CN115962319A

CN115962319A - Non-diaphragm shaft sleeve spring liquid control valve

Info

Publication number: CN115962319A
Application number: CN202111275946.5A
Authority: CN
Inventors: 张磊
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-12-16
Filing date: 2021-10-29
Publication date: 2023-04-14

Abstract

The invention discloses a diaphragm-free shaft sleeve spring liquid control valve which comprises a cover, a body, a piston cylinder inner ring, a piston seal ring groove, a piston seal ring, a seal ring groove, an extending end face below the piston, a spigot of an inner cavity at an outlet end of the body, wherein the piston cylinder inner ring is arranged on the cover, arranged on the body or arranged on the cover and the body, the piston seal ring groove is arranged on the piston, the piston seal ring is arranged on the piston seal ring groove, the seal ring groove is arranged on the cover, arranged on the body or arranged on the cover and the body, the seal ring is arranged in the seal ring groove, the piston is arranged in the piston cylinder inner ring and the seal ring, a whole body is formed between the piston and the extending end face below the piston, and the cover and the body are sealed into a whole body. The invention does not need to use a diaphragm, a shaft lever, a shaft sleeve and a spring, and has simple structure and small head loss.

Description

Non-diaphragm shaft sleeve spring liquid control valve

Technical Field

The invention relates to a diaphragm-free liquid control valve with a shaft sleeve and a spring, in particular to a diaphragm-free liquid control valve with a shaft sleeve and a spring, which can meet the flowing working condition requirements of various liquids and can be formed by different processing structures and assembling forms of sealing rings.

Background

The existing liquid control valve needs to use a diaphragm, a shaft lever, a shaft sleeve and a spring; the flowing direction of the liquid can only control the valve in one way during operation; the static liquid flow cannot be set under the conditions required by the working conditions.

The existing liquid control valve is provided with a diaphragm to push a cut-off pressing plate connected with a shaft rod to close and open the valve, once the diaphragm is damaged and replaced quite difficultly, a professional technician is required to replace the diaphragm, particularly, the diaphragm is more difficult to replace for the large-caliber valve, and the cost for manufacturing the diaphragm of the large-caliber liquid control valve and processing the diaphragm is quite high.

The existing liquid control valve needs to be provided with a shaft lever and a shaft sleeve to guide and push a closure pressing plate connected with the shaft lever to effectively close and open the valve, and because the shaft lever and the shaft sleeve need to be arranged, the scaling phenomenon is easily generated in a large amount of liquid, and the valve is easily closed or opened to lose efficacy.

The prior liquid control valve only can control the valve in a one-way mode in the flowing direction of liquid during operation, so the application range has a plurality of limitations.

The existing liquid control valve needs to use a spring to reset and increase the stability when the valve is closed, and the elasticity of the spring can cause certain pressure loss of the starting pressure for opening the valve, so that the starting pressure requirement is large, the head loss of the valve is large, and the valve can only be used in a specific working condition.

Disclosure of Invention

The liquid control valve of the non-diaphragm shaft sleeve spring overcomes the technical defects of the current liquid control valve, and forms a brand-new liquid control valve of the non-diaphragm shaft sleeve spring, which can meet the requirements of various liquid flowing working conditions, by processing and assembling types through different structures without using diaphragms, shafts, shaft sleeves and springs. Under the condition that the working condition needs, the liquid flowing direction can pass through the liquid control valve without the diaphragm shaft sleeve spring in a one-way or two-way mode, and the liquid control valve without the diaphragm shaft sleeve spring is closed in a one-way or two-way mode; the diaphragm-free shaft-sleeve spring liquid control valve can set the static liquid flow under the condition of working condition requirement.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

a diaphragm-free shaft sleeve spring liquid control valve comprises a cover, a body, a piston cylinder inner ring, a piston seal ring groove, a piston seal ring, a hole seal ring groove, an extending end face below the piston and a body outlet end inner cavity spigot; the structure is characterized in that:

the piston sealing ring groove is arranged on the piston, the piston sealing ring is arranged in the piston sealing ring groove, the hole sealing ring is arranged in the hole sealing ring groove, and the piston is arranged in the inner ring of the piston cylinder and the hole sealing ring;

the arrangement mode of the inner ring of the piston cylinder adopts one of the following seven forms:

is arranged at the position of the piston corresponding to the cover,

is arranged at the position of the piston corresponding to the body,

at the same time, the piston is arranged at the position corresponding to the cover and the body,

is arranged on the position of the piston corresponding to the seat, wherein the seat is arranged between the cover and the body,

at the same time, the piston is arranged at the position corresponding to the cover and the seat,

at the same time, the piston is arranged at the position corresponding to the seat and the body,

at the same time, the piston is arranged at the position corresponding to the cover, the seat and the body;

the arrangement mode of the hole sealing ring groove adopts one of the following seven modes:

is arranged on the cover, and is provided with a plurality of grooves,

is arranged on the body and is provided with a plurality of grooves,

and are arranged on the cover and the body at the same time,

is arranged on the seat and is provided with a plurality of grooves,

are arranged on the cover and the seat at the same time,

is arranged on the seat and the body at the same time,

set up simultaneously on lid, seat and the body:

the piston and the extending end surface below the piston are integrated, and the cover and the body or the cover, the seat and the body are sealed into a whole;

the inner ring of the piston sealing ring is sealed with the piston sealing ring groove, the outer ring of the hole sealing ring is sealed with the hole sealing ring groove, the outer ring of the piston sealing ring and the inner ring of the piston cylinder as well as the inner ring of the hole sealing ring and the outer ring of the piston are statically sealed and slidably sealed, so that the inner cavity of the piston and the inner cavity of the body outlet end are sealed;

the body is provided with a body outlet end inner cavity and a body inlet end inner cavity, and the extending end surface below the piston is matched and sealed with a body outlet end inner cavity spigot after the piston moves, so that the body outlet end inner cavity and the body inlet end inner cavity are sealed.

The invention does not need to use the diaphragm, the shaft lever, the shaft sleeve and the spring of the existing hydraulic valve, and has simple structure and small head loss.

According to the embodiment of the invention, the invention can be further optimized, and the following is the technical scheme formed after optimization:

in one preferred embodiment, the cross section of the inner ring of the piston cylinder is circular, the cross section of the piston is circular, the longitudinal section of the piston is U-shaped, the cross sections of the piston sealing ring groove and the hole sealing ring groove are circular, the longitudinal section of the piston sealing ring groove and the hole sealing ring groove are concave, the cross sections of the piston sealing ring and the hole sealing ring are circular, the longitudinal section of the piston sealing ring groove and the hole sealing ring groove are V-shaped, and the cross section of the body outlet end inner cavity spigot is circular.

In one preferred embodiment, the inner diameter of the body outlet end inner cavity spigot is smaller than the outer diameter of the piston, the ring planes of the piston sealing ring groove and the hole sealing ring groove are parallel to the ring plane spacing of the body outlet end inner cavity spigot, the center line positions of the piston are the same, the piston is arranged in a piston cylinder inner ring and a hole sealing ring, the ring plane center positions of the piston cylinder inner ring and the hole sealing ring groove are the same as the center line positions of the piston above and below, the outer ring of the piston sealing ring is contacted with the piston cylinder inner ring, the inner ring of the hole sealing ring is contacted with the piston outer ring, the piston inner diameter opening of the piston faces towards the inner cavity of the piston or the opposite direction of the inner cavity of the piston, and the piston and the extending end face below the piston are vertically connected and fixed into a whole; the lower extending end face of the piston is provided with a sealing face, the inner ring of the piston sealing ring and the groove of the piston sealing ring as well as the outer ring of the hole sealing ring and the groove of the hole sealing ring are in contact sealing with elastic retention, and the outer ring of the piston sealing ring and the inner ring of the piston cylinder as well as the inner ring of the hole sealing ring and the outer ring of the piston are in static contact sealing and sliding contact sealing with elastic retention; the piston sealing ring and the hole sealing ring have elastic retention, once the direction of the expansion opening is pressurized by liquid, the piston sealing ring and the hole sealing ring expand and stretch along with the increase and decrease of the hydraulic pressure, and if the direction of the expansion opening is pressurized by the hydraulic pressure, the piston sealing ring and the hole sealing ring do not expand and stretch along with the increase and decrease of the hydraulic pressure; the direction of the expansion openings of the piston sealing ring and the hole sealing ring faces towards the inner cavity of the piston or the direction opposite to the inner cavity of the piston, and the cover and the body are connected and fixed into a whole in a sealing mode.

In one preferred embodiment, the hole sealing ring groove is arranged on the piston, the number of the piston sealing ring groove and the hole sealing ring groove is 1 to more than 1, the number of the piston sealing ring and the hole sealing ring is the same as that of the piston sealing ring groove and the hole sealing ring groove, the number of the piston sealing ring and the hole sealing ring groove is matched with that of the piston sealing ring groove and the hole sealing ring groove, the piston sealing ring groove and the hole sealing ring groove are in the same number and are in the same type, the cover and the body or the cover, the base and the body are in sealing connection through screws to form a whole, and sealing is sealed through sealing strips.

In one preferred embodiment, the cap is fitted with a shaft extending into the interior cavity of the piston, the shaft being sealed from contact with the cap.

In one preferred embodiment, the inner cavity of the piston and the inner cavity of the body inlet end, and the inner cavity of the piston and the inner cavity of the body outlet end are connected through a pipeline with a valve or directly connected through a pipeline.

In one preferred embodiment, the valve is provided with an electric actuator, and the electric actuator performs valve opening and closing.

In one preferred embodiment, the inner cavity of the piston is connected with a three-way valve through a pipeline, one outlet of the three-way valve is connected into the inner cavity at the inlet end through a pipeline connector, and the other outlet of the three-way valve is connected into the inner cavity at the outlet end through a pipeline connector;

or alternatively

The inner cavity of the piston is connected with a three-way valve through a pipeline, one outlet of the three-way valve is connected into the inner cavity of the inlet end through a pipeline and a check valve connector, and the other outlet of the three-way valve is connected into the inner cavity of the outlet end through a pipeline connector.

In one preferred embodiment, the inner cavity of the piston is communicated with the inner cavity of the inlet end of the two-way valve connector through a pipeline, and the inner cavity of the piston is communicated with the inner cavity of the outlet end of the two-way valve connector through a pipeline;

or

The inner cavity of the piston is communicated with the inner cavity of the inlet end through a pipeline, an inlet end two-way valve and a semi-closed check valve connector, and the inner cavity of the piston is communicated with the inner cavity of the outlet end through a pipeline, an outlet end two-way valve and a semi-closed check valve connector.

In one preferred embodiment, the inner cavity of the piston is connected with a tee joint I through a two-way valve I, two outlets of the tee joint I are respectively provided with a check valve, wherein the outlet of one check valve is connected into the inner cavity at the inlet end through a pipeline connector, and the outlet of the other check valve is connected into the inner cavity at the outlet end through a pipeline connector; the inner cavity of the piston is connected with a tee joint II through a two-way valve II, two outlets of the tee joint II are respectively provided with a check valve, the outlet of one check valve is connected with the inner cavity of the inlet end of the valve body through a pipeline, and the outlet of one check valve is connected with the inner cavity of the outlet end of the valve body through a pipeline connector.

In one preferred embodiment, the inner cavity of the piston is connected with the inner cavity of the inlet end through a pipeline and an inlet end two-way valve, the inner cavity of the piston is connected with the ball float valve through an outlet end two-way valve and a pipeline, and the flange of the inner cavity of the outlet end of the piston is connected with the pipeline to the liquid pool.

In one preferred embodiment, the inner cavity of the piston is connected with one outlet of a hand wheel three-way pilot valve through a check valve and a pipeline, the other outlet of the hand wheel three-way pilot valve is connected with a liquid inlet end of the pump through a pipeline, an inlet of the hand wheel three-way pilot valve is connected with the inner cavity of the inlet end through a pipeline and an inlet end two-way valve connector, the hand wheel three-way pilot valve is provided with a hand wheel, and the inner cavity of the piston is connected with the inner cavity of the outlet end through a pipeline and an outlet end two-way valve connector.

In one preferred embodiment, the inner cavity of the piston is connected with an inlet of the two-way valve through a pipeline, the outlet of the two-way valve passes through an outlet two-way valve and an outlet inner cavity of the pipeline connector, the inner cavity of the piston passes through a pipeline and an inlet two-way valve connector and enters the inner cavity of the pipeline connector, and the top of the two-way valve is provided with a screw rod.

In one preferred embodiment, the inner cavity of the piston is connected with one outlet of the three-way pilot valve through a pipeline, the other outlet of the three-way pilot valve passes through an outlet two-way valve and an outlet inner cavity of the pipeline connector, the body inlet inner cavity passes through an inlet two-way valve and a pipeline and is connected with the inlet of the three-way pilot valve, the inner cavity of the piston passes through a two-way valve III and an outlet inner cavity of the pipeline connector, and the top of the three-way pilot valve is provided with a screw rod.

The technical scheme of the invention is further explained in detail as follows:

the invention relates to a diaphragm-free shaft sleeve spring liquid control valve of a shaft rod, which comprises a cover, a body, a piston cylinder inner ring, a piston seal ring groove, a piston seal ring, a hole seal ring groove, an extending end surface below the piston and a body outlet end inner cavity spigot, and is characterized in that: the inner ring of the piston cylinder is arranged on the cover, the body and the cover and the body, the piston seal ring groove is arranged on the piston, the piston seal ring is arranged on the piston seal ring groove, the hole seal ring groove is arranged on the cover and the body, the hole seal ring is arranged in the hole seal ring groove on the cover and the body, the piston is arranged in the inner ring of the piston cylinder and the hole seal ring, the piston and the lower extending end surface of the piston are integrated, the cover and the body are sealed into a whole, the inner ring of the piston seal ring is sealed with the piston seal ring groove and the outer ring of the hole seal ring is sealed with the hole seal ring groove, and the outer ring of the piston seal ring and the inner ring of the piston cylinder and the inner ring of the hole seal ring and the outer ring of the piston are statically sealed and slidably sealed, so that the inner cavity of the piston and the inner cavity of the body outlet end are sealed; the lower extending end surface of the piston is matched and sealed with the spigot of the inner cavity of the body outlet end after the piston moves, and the inner cavity of the body inlet end and the inner cavity of the body outlet end are sealed; the inner cavity of the piston is connected with the inner cavity of the body inlet end and the inner cavity of the body outlet end through a pipeline, a valve or a pilot valve.

The processing structure of the inner ring of the piston cylinder, the groove of the piston seal ring and the groove of the hole seal ring and the assembly structure description of the piston seal ring and the hole seal ring are as follows:

the processing structure of the piston cylinder inner ring, the piston seal ring groove and the hole seal ring groove and the assembling structure of the piston seal ring and the hole seal ring have the following 5 structural forms, but in the manufacturing and installing process of the valve, the processing structure of the piston cylinder inner ring and the piston seal ring groove and the assembling structure of the piston seal ring and the hole seal ring can be set and changed according to requirements, but under the condition of following the basic structural principle of the invention, the form change range exceeding the processing structure of the piston cylinder inner ring, the piston seal ring groove and the hole seal ring groove and the assembling structure of the piston seal ring and the hole seal ring is also the protection range of the invention.

When a base is not arranged, the inner ring of the piston cylinder is processed on the cover, the piston seal ring groove is processed on the body, the inner ring of the piston cylinder is processed on the body, the piston seal ring groove is processed on the cover, the inner ring of the piston cylinder is processed on the cover and the body, the piston seal ring groove is processed on the cover and the body, the processing mode is selected from one of three, the hole seal ring groove is processed on the piston, the number of the processed piston seal ring grooves and the number of the processed hole seal ring grooves are more than 1 to 1, the number of the installed piston seal rings and the number of the installed hole seal rings are the same as the number of the processed piston seal ring grooves and the number of the processed hole seal ring grooves, the types of the installed piston seal rings and the installed hole seal rings are matched, the cover and the body are fixedly connected into a whole by screws, and sealing is sealed by adopting sealing strips.

When a base is arranged, the base is additionally arranged between the cover and the body, the inner ring of the piston cylinder is machined on the base, the piston seal ring groove is machined on the cover and the body, the inner ring of the piston cylinder is machined on the cover and the body, the piston seal ring groove is machined on the base, the machining mode is selected from two, the hole seal ring groove is machined on the piston, the number of the machined piston seal ring grooves and the number of the machined hole seal ring grooves are 1-1, the number of the installed piston seal rings and the number of the installed hole seal rings are the same as the number of the machined piston seal ring grooves and the number of the machined hole seal ring grooves, the installed piston seal rings and the installed hole seal rings are matched in model, the cover, the base and the body are fixedly connected into a whole through screws, and sealing is realized through sealing strips.

The diaphragm-free shaft rod shaft sleeve spring liquid control valve is characterized in that a shaft rod is arranged on the cover and extends into an inner cavity of the piston, the contact part of the shaft rod and the cover is sealed, and the shaft rod can move up and down by rotating a hand wheel.

The valve is provided with an electric actuator, and the valve is opened and closed by the electric actuator.

The invention describes the connection mode of the inner cavity of the piston, the inner cavity of the body inlet end and the inner cavity of the body outlet end through pipelines, valves or pilot valves:

the inner cavity of the piston is connected with the inner cavity of the body inlet end and the inner cavity of the body outlet end through pipelines, valves or pilot valves to form a liquid control valve meeting different working condition requirements. The pipe connection, valve connection or pilot valve connection form of the invention has the following 9 connection forms, but the pipe connection, valve connection or pilot valve connection of the invention is not limited to the 9 connection forms, and the connection forms of the pipe connection, valve connection or pilot valve connection which can be correspondingly changed to meet the requirements of the required working conditions for the pipe connection, valve connection or pilot valve connection can be made between the inner cavity of the piston of the invention and the inner cavity of the body inlet end and the inner cavity of the body outlet end through the pipe connection, the valve connection or the pilot valve connection according to the requirements of the working conditions under the condition of following the basic structure principle of the invention are also the protection scope of the invention.

The inner cavity of the piston is connected with a three-way valve through a pipeline, one outlet of the three-way valve is connected into the inner cavity of the inlet end through a pipeline connector, and the other outlet of the three-way valve is connected with the inner cavity of the outlet end through a pipeline connector.

The diaphragm-free shaft rod shaft sleeve spring liquid control valve is characterized in that the inner cavity of the piston is connected into the inner cavity through a pipeline and an inlet two-way valve connector, and the inner cavity of the piston is connected into an outlet inner cavity through a pipeline and an outlet two-way valve connector.

The diaphragm-free shaft rod shaft sleeve spring liquid control valve is characterized in that the inner cavity of the piston passes through a pipeline and an inlet end two-way valve and semi-closed check valve connector inlet end inner cavity, and the inner cavity of the piston passes through a pipeline and an outlet end two-way valve and semi-closed check valve connector outlet end inner cavity.

The inner cavity of the piston is connected with a tee through a two-way valve, a check valve is installed at two outlets of the tee, the outlet of the check valve is connected into the inner cavity through a pipeline connector, the outlet of the check valve is connected out of the inner cavity through a pipeline connector, the inner cavity of the piston is connected with the tee through the two-way valve, the two outlets of the tee are both provided with the check valve, the outlet of the check valve is connected with the inner cavity of the valve body through a pipeline, and the outlet of the check valve is connected out of the inner cavity through a pipeline connector.

The diaphragm-free shaft rod shaft sleeve spring liquid control valve is characterized in that the inner cavity of the piston is connected into the inner cavity through a pipeline and an inlet two-way valve connector, the inner cavity of the piston is connected with a ball float valve through an outlet two-way valve and a pipeline, and the flange of the inner cavity of the body outlet is connected with the pipeline to a liquid pool.

The diaphragm-free shaft sleeve spring liquid control valve is characterized in that the inner cavity of the piston is connected with one outlet of a hand wheel three-way pilot valve through a check valve and a pipeline, the other outlet of the hand wheel three-way pilot valve is connected with the liquid inlet end of a pump through a pipeline, the inlet of the hand wheel three-way pilot valve is connected with the inner cavity of the inlet end two-way valve connector through a pipeline, a hand wheel is arranged on the hand wheel three-way pilot valve, and the inner cavity of the piston is connected with the inner cavity of the outlet end two-way valve connector through a pipeline.

The diaphragm-free shaft rod shaft sleeve spring liquid control valve is characterized in that an inner cavity of a piston is connected with an inlet of a two-way valve through a pipeline, an outlet of the two-way valve passes through an outlet two-way valve and an outlet inner cavity of a pipeline connector, an inner cavity of the piston passes through a pipeline and an inlet two-way valve connector and enters an inner cavity, and a screw rod is arranged at the top of the two-way valve.

The diaphragm-free shaft sleeve spring liquid control valve is characterized in that the inner cavity of the piston is connected with one outlet of the three-way pilot valve through a pipeline, the other outlet of the three-way pilot valve is connected with the inlet of the three-way pilot valve through an outlet two-way valve and an outlet inner cavity of a pipeline connector, the inner cavity of the body inlet is connected with the inlet of the three-way pilot valve through an inlet two-way valve and a pipeline connector, the inner cavity of the piston is connected with the outlet inner cavity of the two-way valve and the outlet inner cavity of the pipeline connector, and the top of the three-way pilot valve is provided with a screw.

By using the liquid control valve without the diaphragm, the processing structure and the assembling method of the liquid control valve can enable the diaphragm of the liquid control valve to be replaced by the sealing ring, and navigation of the shaft lever and the shaft sleeve is not needed, so that the assembly is convenient; after the liquid control valve without the diaphragm shaft sleeve spring is installed and used, if a sealing ring and a piston are damaged, due to the unique manufacturing and assembling method, the liquid control valve is extremely convenient to maintain and does not need to be replaced by professional technicians, and therefore the service life of the liquid control valve without the diaphragm shaft sleeve spring can be basically the same as that of a pipeline.

The diaphragm-free shaft sleeve spring liquid control valve reduces the failure rate of the liquid control valve due to the unique design, and increases and expands the application range of the liquid control valve.

In the aspect of manufacturing, the liquid control valve without the diaphragm, the shaft lever and the shaft sleeve has the advantages that the manufacturing is simple and the cost is reduced because the liquid control valve is free of the diaphragm, the shaft lever and the shaft sleeve; especially, the equipment grade required for manufacturing the large-opening liquid control valve can be greatly reduced, so that the liquid control valve with an ultra-large diameter can be manufactured.

The structure and the assembly method of the liquid control valve without the diaphragm, the shaft sleeve and the spring of the diaphragm shaft can enable the liquid control valve to be a single component to be assembled on site, and particularly can greatly reduce the transportation and installation cost in the transportation and installation of large valves.

The structure of the liquid control valve without the diaphragm, the shaft lever, the shaft sleeve and the spring can ensure that the liquid control valve does not need to be provided with the diaphragm, the shaft lever, the shaft sleeve and the spring; the liquid can pass through the valve in one or two directions, and the valve is closed in one or two directions; the liquid flow and pressure can be dynamically and statically controlled, so that the application range of the liquid control valve can meet the technical and performance requirements of valves such as gate valves, butterfly valves, stop valves, flow limiting valves, check valves, ball float valves, pressure reducing valves, pressure relief valves, electric valves and the like, and the intelligent control of liquid flow is particularly easy to realize.

Drawings

FIG. 1 is a schematic diagram of the basic structure of a first diaphragm-free shaft sleeve spring fluid control valve; wherein a) the body and its partially enlarged groove are in elevation and section, b) the cover is in elevation and section, c) the first piston and its lower extending end piece and its piston partially enlarged groove are in elevation and section, d) the second piston and its lower extending end piece and its piston are in elevation and section, e) the sealing ring and its partially enlarged elevation and section, f) the sealing ring of the piston and its partially enlarged elevation and section, g) the valve embodiment is in elevation and section schematically.

FIG. 2 is a schematic diagram of the basic structure of a second diaphragm-free shaft sleeve spring fluid control valve; wherein a) a front section of the body, b) a front section of the cover and its partly enlarged groove, c) a front section of the first piston and the lower extending end piece and its piston enlarged groove, d) a front section of the second piston and the lower extending end piece and its piston, e) a piston sealing ring and its partly enlarged front section, f) a sealing ring and its partly enlarged front section, g) a front section of the valve embodiment.

FIG. 3 is a schematic diagram of the basic structure of a third diaphragm-free shaft sleeve spring liquid control valve: wherein a) an elevational view of the body, b) an elevational view of the cover and its partially enlarged groove, c) an elevational view of the first piston and its lower extending end piece and its piston partially enlarged groove, d) an elevational view of the second piston and its lower extending end piece and its piston, e) a sealing ring and its partially enlarged elevational view, f) a sealing ring and its partially enlarged elevational view, g) a piston sealing ring and its partially enlarged elevational view, h) a piston sealing ring and its partially enlarged elevational view, i) an elevational view of the valve embodiment, is schematically depicted in cross section.

Fig. 4 is a schematic diagram of the basic structure of a fourth diaphragm-free shaft sleeve spring liquid control valve, and a schematic diagram of a front section of an embodiment of the valve.

FIG. 5 is a schematic diagram of the basic structure of a fifth diaphragm-free shaft-sleeve spring fluid control valve; wherein a) the front section view of the body and its locally enlarged concave groove, b) the front section view of the cover, c) the front section view of the first piston and its below-extending end-face entity and its piston locally enlarged concave groove, d) the front section view of the second piston and its below-extending end-face entity and its U-shaped piston, e) the sealing ring and its V-shaped locally enlarged front section view, f) the piston sealing ring and its V-shaped locally enlarged front section view, g) the front section view of the valve embodiment.

FIG. 6 is a schematic diagram of the basic structure of a sixth diaphragm-free shaft sleeve spring liquid control valve; wherein a) an elevational cross-section of the body, b) an elevational cross-section of the cover and its partially enlarged concave groove, c) an elevational cross-section of the first piston and its lower extending end-face entity and its piston partially enlarged concave groove, d) an elevational cross-section of the second piston and its lower extending end-face entity and its U-shaped piston, e) a sealing ring and its V-shaped partially enlarged elevational cross-section, f) a piston sealing ring and its V-shaped partially enlarged elevational cross-section, g) an elevational cross-section schematic of an embodiment of the valve.

FIG. 7 is a schematic diagram of the basic structure of a seventh diaphragm-free shaft sleeve spring liquid control valve; wherein a) the body and its locally enlarged concave groove section front view, b) the cover and its locally enlarged concave groove section front view, c) the first piston and its below extending end face entity and its piston locally enlarged concave groove section front view, d) the second piston and its below extending end face entity and its U-shaped piston section front view, e) the sealing ring and its V-shaped locally enlarged section front view, f) the sealing ring and its V-shaped locally enlarged section front view, g) the piston sealing ring and its V-shaped locally enlarged section front view, h) the piston sealing ring and its V-shaped locally enlarged section front view, i) the valve embodiment section front view.

FIG. 8 is a schematic diagram of the basic structure of an eighth non-diaphragm shaft-sleeve spring fluid control valve; valve embodiments and partially enlarged front sectional views thereof.

FIG. 9 is a schematic view of a seal ring groove machining structure and a seal ring assembling structure of a ninth diaphragm-free shaft sleeve spring liquid control valve; wherein a) the body and its partially enlarged concave groove are in elevation and section, b) the cover is in elevation and section, c) the first piston and its lower extending end surface entity and its piston partially enlarged concave groove are in elevation and section, d) the second piston and its lower extending end surface entity are in elevation and section, e) the sealing ring and its V-shaped partially enlarged elevation and section, f) the piston sealing ring and its V-shaped partially enlarged elevation and section, g) the valve embodiment and its partially enlarged elevation and section are schematically illustrated.

FIG. 10 is a schematic view of a tenth seal groove machining structure and a seal assembly structure of a diaphragm-free shaft sleeve spring liquid control valve; wherein a) a front section view of the body, b) a front section view of the cover and its partially enlarged concave groove, c) a front section view of the first piston and its lower extending end surface entity and its piston partially enlarged concave groove, d) a front section view of the second piston and its lower extending end surface entity, e) a piston sealing ring and its V-shaped partially enlarged front section view, f) a sealing ring and its V-shaped partially enlarged front section view, g) a valve embodiment and its partially enlarged front section view are schematically illustrated.

FIG. 11 is a groove forming structure and a packing assembly structure of an eleventh packing for a diaphragm-less spindle sleeve spring fluid control valve; wherein a) the body and its locally enlarged concave groove section, b) the cover and its locally enlarged concave groove section, c) the first piston and its lower extending end surface entity and its piston locally enlarged concave groove section, d) the second piston and its lower extending end surface entity section, e) the sealing ring and its V-shaped locally enlarged section, f) the sealing ring and its V-shaped locally enlarged section, g) the piston sealing ring and its V-shaped locally enlarged section, h) the piston sealing ring and its V-shaped locally enlarged section, i) the valve embodiment and its locally enlarged section.

FIG. 12 is a schematic view of a seal ring groove machining structure and a seal ring assembling structure of a twelfth diaphragm-free shaft sleeve spring liquid control valve; wherein a) a front section view of the body, b) a front section view of the cover, c) a front section view of the first piston and the lower extending end surface entity and its piston locally enlarged concave groove, d) a front section view of the second piston and the lower extending end surface entity, e) a front section view of the seat and its locally enlarged concave groove, f) a piston sealing ring and its locally enlarged front section view, g) a sealing ring and its locally enlarged front section view, h) a piston sealing ring and its locally enlarged front section view, i) a valve embodiment and its locally enlarged front section view.

FIG. 13 is a schematic view of a seal ring groove machining structure and a seal ring assembling structure of a thirteenth diaphragm-free shaft sleeve spring liquid control valve; wherein a) the body and its locally enlarged concave groove are in elevation and section, b) the cover and its locally enlarged concave groove are in elevation and section, c) the first piston and the lower extending end surface entity and its piston locally enlarged concave groove are in elevation and section, d) the second piston and the lower extending end surface entity are in elevation and section, e) the seat is in elevation and section, f) the sealing ring and its V-shaped locally enlarged elevation and section, g) the piston sealing ring and its V-shaped locally enlarged elevation and section, h) the sealing ring and its V-shaped locally enlarged elevation and section, i) the valve embodiment and its locally enlarged elevation and section.

FIG. 14 is a schematic diagram of a constrictor valve configuration for a diaphragm-free shaft-sleeve spring liquid control valve basic configuration.

FIG. 15 is a schematic diagram of an alternative restrictor valve configuration for the diaphragm-less spindle sleeve spring fluid control valve basic configuration.

Fig. 16 is a schematic diagram of an electric valve configuration for a diaphragm-less spindle sleeve spring liquid control valve basic configuration.

Fig. 17 is a schematic diagram of an alternative diaphragm-less spindle sleeve spring liquid control valve basic structure electric valve configuration.

FIG. 18 is a schematic diagram of a one-way single shut-off valve for a diaphragm-free shaft sleeve spring fluid control valve.

FIG. 19 is a schematic diagram of a one-way dual shut-off valve for a diaphragm-free shaft sleeve spring fluid control valve.

FIG. 20 is a schematic diagram of a non-diaphragm, spool-sleeve, spring-loaded check and shut-off valve for a fluid control valve.

FIG. 21 is a schematic diagram of a two-way single shut-off valve for a diaphragm-free spindle sleeve spring fluid control valve.

FIG. 22 is a schematic diagram of a two-way dual shut-off valve for a diaphragm-free shaft sleeve spring fluid control valve.

FIG. 23 is a schematic diagram of a diaphragm-free shaft sleeve spring liquid control valve float valve.

FIG. 24 is a schematic diagram of a diaphragm-free shaft-sleeve spring fluid control valve constrictor and check valve.

FIG. 25 is a schematic diagram of a pressure reducing and stabilizing valve for a diaphragm-free shaft sleeve spring liquid control valve.

FIG. 26 is a schematic diagram of a diaphragm-less spindle sleeve spring relief valve for a fluid control valve.

Description of the drawings:

the valve comprises a cover 1, a seat 2, a body 3, a piston cylinder inner ring 4, a piston 5, a piston seal ring groove 6, a piston seal ring 7, a hole seal ring 8, a hole seal ring groove 9, a piston lower extension end face 10, a body outlet end inner cavity spigot 11, an inner cavity 12 of the piston, a body outlet end inner cavity 13, an inner ring 14 of the piston seal ring, an outer ring 15 of the hole seal ring, an outer ring 16 of the piston seal ring, an inner ring 17 of the hole seal ring, an outer ring 18 of the piston, a body inlet end inner cavity 19, a U-shaped 20, a concave type 21, a V-shaped 22, a piston inner diameter opening 23, a sealing surface 24, an expansion opening 25, a screw 26, a sealing strip 27, a shaft rod 28, a hand wheel 29, a pipeline 30, a first valve 31, a second valve 32, a three-way valve 33, a check valve 34, an inlet two-way valve 35, an outlet end two-way valve 36, a semi-closing check valve 37, a two-way valve I38, a three-way I39, a two-way valve II 40, a three-way II 41, a floating valve 42, a flange 43 of the body outlet end inner cavity, a pipeline 44, a liquid tank 45, a hand wheel 46, a pump 47, a three-way inlet valve 48, a liquid three-way pilot valve 48, a three-way valve III, a screw actuator 51, a screw actuator 52, a hand wheel actuator 52, and an electric hand wheel actuator 52.

Detailed Description

Example 1

The invention relates to a diaphragm-free shaft sleeve spring liquid control valve, which comprises a cover 1, a body 3, a piston cylinder inner ring 4, a piston 5, a piston seal ring groove 6, a piston seal ring 7, a hole seal ring 8, a hole seal ring groove 9, an extending end surface 10 below the piston and a body outlet end inner cavity spigot 11, and is characterized in that: the piston cylinder inner ring 4 is arranged on the cover 1, the body 3, the cover 1 and the body 3, the piston seal ring groove 6 is arranged on the piston 5, the piston seal ring 7 is arranged on the piston seal ring groove 6, the hole seal ring groove 9 is arranged on the cover 1, the body 3 and the cover 1 and the body 3, the hole seal ring 8 is arranged in the hole seal ring groove 9, the piston 5 is arranged in the piston cylinder inner ring 4 and the hole seal ring 8, the piston 5 and the piston lower extension end face 10 are integrated, the cover 1 and the body 3 are sealed into a whole, the inner ring 14 of the piston seal ring and the piston seal ring groove 6 as well as the outer ring 15 of the hole seal ring and the hole seal ring groove 9 are sealed, the outer ring 16 of the piston seal ring and the piston cylinder inner ring 4 as well as the inner ring 17 of the hole seal ring and the piston outer ring 18 are statically sealed and slidably sealed, so that the inner cavity 12 of the piston and the body outlet end inner cavity 13 are sealed, and the piston lower extension end face 10 is matched with the body outlet end inner cavity stop port 11 after the piston 5 moves, and the body outlet end is sealed with the inner cavity 13. The inner cavity 12 of the piston is connected with the inner cavity 19 of the body inlet end and the inner cavity 13 of the body outlet end through a pipeline, a valve or a guide valve.

Example 2

The diaphragm-free shaft sleeve spring liquid control valve is characterized in that as shown in figures 5, 6, 7 and 8, the plane of the piston cylinder inner ring 4 is circular, the plane of the piston 5 is circular, the section of the piston 5 is U-shaped 20, the planes of the piston seal ring groove 6 and the hole seal ring groove 9 are circular, the section of the piston seal ring groove 6 and the hole seal ring groove 9 is concave 21, the planes of the piston seal ring 7 and the hole seal ring 8 are circular, the section of the piston seal ring 8 is V-shaped 22, the plane of the body outlet end inner cavity spigot 11 is circular, the inner diameter of the body outlet end inner cavity spigot 11 is smaller than the outer diameter of the piston 5, the ring planes of the piston seal ring groove 6 and the hole seal ring groove 9 are parallel to the ring plane space of the body outlet end inner cavity spigot 11, the center line positions are the same, the center line positions of the ring planes of the piston cylinder inner ring 4 and the hole seal ring groove 9 are the same as and vertical to the center line positions of the upper and lower parts of the piston 5 arranged in the piston cylinder inner ring 4 and the hole seal ring 8, the piston 5 is arranged in a piston cylinder inner ring 4 and a hole sealing ring 8, an outer ring 16 of the piston sealing ring is in contact with the piston cylinder inner ring 4 and an inner ring 17 of the hole sealing ring is in contact with a piston outer ring 18, the direction of a piston inner diameter opening 23 of the piston 5 arranged in the piston cylinder inner ring 4 and the hole sealing ring 8 faces towards an inner cavity 12 of the piston or the direction opposite to the inner cavity 12 of the piston, the piston 5 is vertically connected and fixed with a piston lower extending end face 10 into a whole, a sealing face 24 is arranged on the piston lower extending end face 10, an inner ring 14 of the piston sealing ring and a piston sealing ring groove 6 as well as an outer ring 15 of the hole sealing ring and a hole sealing ring groove 9 are in contact sealing with elastic retention, and the outer ring 16 of the piston sealing ring and the piston cylinder inner ring 4 as well as the outer ring 17 of the hole sealing ring and the piston outer ring 18 are in contact sealing with elastic retention The piston sealing ring 7 and the hole sealing ring 8 have elastic holding, once the expansion opening 25 is pressed by liquid, the piston sealing ring 7 and the hole sealing ring 8 expand and contract along with the increase and decrease of the hydraulic pressure, if the expansion opening 25 is pressed by the hydraulic pressure in the opposite direction, the piston sealing ring 7 and the hole sealing ring 8 do not expand and contract along with the increase and decrease of the hydraulic pressure, the piston sealing ring 7 and the hole sealing ring 8 are arranged in the piston sealing ring groove 6 and the hole sealing ring groove 9, the expansion opening 25 is in the direction towards the inner cavity 12 of the piston or in the opposite direction towards the inner cavity 12 of the piston, and the cover 1 and the body 3 are connected and fixed into a whole in a sealing way. The inner cavity 12 of the piston is connected with the inner cavity 19 of the body inlet end and the inner cavity 13 of the body outlet end through pipelines, valves or pilot valves.

The specific description is as follows: the structure of the liquid control valve without the diaphragm, the shaft lever, the shaft sleeve and the spring can ensure that the liquid control valve without the diaphragm, the shaft lever, the shaft sleeve and the spring is not required to be installed; the liquid can pass through the non-diaphragm shaft sleeve spring liquid control valve in two directions; the liquid control valve with no diaphragm, shaft sleeve and spring can close the liquid passage in two directions.

The working principle is as follows: as shown in fig. 1, 2, 3, 4, 5, 6, 7 and 8.

1. The inner cavity 12 of the piston, the inner cavity 19 of the body inlet end and the inner cavity 13 of the body outlet end are connected through the pipeline 30, the first valve 31 and the second valve 32, when liquid flows from the inner cavity 19 of the body inlet end to the inner cavity 13 of the body outlet end, the first valve 31 on the side of the inner cavity 19 of the body inlet end is closed, the second valve 32 on the side of the inner cavity 13 of the body outlet end is opened, the liquid in the inner cavity 19 of the body inlet end cannot enter the inner cavity 12 of the piston, the extending end surface 10 below the piston is pushed by the liquid in the inner cavity 19 of the body inlet end to leave the spigot 11 of the inner cavity of the body outlet end, the liquid in the inner cavity 19 of the body inlet end enters the inner cavity 13 of the body outlet end through the spigot 10 of the inner cavity of the body outlet end, because the inner cavity 12 of the piston is communicated with the inner cavity 13 of the body outlet end, the pressure of the liquid in the inner cavity 12 of the piston is the same as that in the inner cavity 10 of the body outlet end, the liquid in the body inlet end inner cavity 19 can enter the body outlet end inner cavity 13 through the body outlet end inner cavity spigot 10 only depending on the whole weight of the piston 5 vertically and fixedly connected with the piston lower extending end face 10 and the resistance caused by the friction of the outer ring 16 of the piston seal ring and the piston cylinder inner ring 4 as well as the inner ring 17 of the hole seal ring and the piston outer ring 18 with elastically maintained contact seal and sliding contact seal, because the elasticity of the contact seal and the sliding contact seal of the outer ring 16 of the piston seal ring and the piston cylinder inner ring 4 as well as the inner ring 17 of the hole seal ring and the piston outer ring 18 is very small when the piston seal ring 8 and the hole seal ring 7 are not pressurized by the liquid, the resistance caused by the friction is also small, and the liquid in the body inlet end inner cavity 19 can overcome the pressure loss of the resistance caused by the whole weight of the piston 5 vertically and fixedly connected with the piston lower extending end face 10 and the friction of the sliding contact seal of the outer ring 16 of the piston seal ring and the piston cylinder inner ring 4 as well as the inner ring 17 of the hole seal ring and the piston outer ring 18, the liquid in the inner cavity 19 of the body inlet end can flow into the inner cavity 13 of the body outlet end, so that the pressure loss of the liquid flowing through the spigot 11 of the inner cavity of the body outlet end and entering the inner cavity 13 of the body outlet end is very small, the starting pressure of the liquid control valve of the diaphragm-free shaft sleeve spring is very small, and the application working condition range of the liquid control valve of the diaphragm-free shaft sleeve spring is large.

2. The inner cavity 12, the body inlet end inner cavity 19 and the body outlet end inner cavity 13 of the piston are connected through a pipeline 30, a first valve 31 and a second valve 32, when liquid flows from the body inlet end inner cavity 19 to the body outlet end inner cavity 13, the first valve 31 on the side of the body inlet end inner cavity 19 is opened, the second valve 32 on the side of the body outlet end inner cavity 13 is closed, the liquid in the body inlet end inner cavity 19 enters the inner cavity 12 of the piston, the inner cavity 12 of the piston is not communicated with the body outlet end inner cavity 13, the liquid pressure in the inner cavity 12 of the piston is the same as that in the body inlet end inner cavity 19, the liquid pressure in the body outlet end inner cavity 13 overcomes the resistance caused by the friction of the contact seal and the sliding contact seal of the elastic holding between the whole weight of the piston 5 and the extending end surface 10 below the piston and the outer ring 16 of the piston seal ring and the piston cylinder inner ring 4 and between the inner ring 17 of the hole seal ring and the piston outer ring 18, therefore, a very small pressure difference exists between the liquid pressure in the inner cavity 19 of the body inlet end and the liquid pressure in the inner cavity 13 of the body outlet end, the elasticity of the contact seal and the sliding contact seal of the outer ring 16 of the piston seal ring and the inner ring 4 of the piston cylinder and the elasticity of the contact seal and the sliding contact seal of the inner ring 17 of the hole seal ring and the outer ring 18 of the piston are very small when the piston seal ring 8 and the hole seal ring 7 are not pressed by the liquid, the resistance caused by friction is small, the outer ring 16 of the piston seal ring and the inner ring 4 of the piston cylinder and the inner ring 17 of the hole seal ring and the outer ring 18 of the piston are elastically maintained, the liquid cannot leak into the inner cavity 13 of the body outlet end, and the area of the outer ring of the piston 5 is larger than the area of the inner ring of the spigot 11 of the body outlet end, so the piston 5 moves downwards after being pressed, the distance between the piston lower extension end face 10 and the body outlet end inner cavity spigot 11 is gradually close when the piston 5 moves downwards, the liquid pressure difference between the body inlet end inner cavity 19 and the body outlet end inner cavity 13 is gradually increased, in the process that the liquid pressure is gradually increased, the direction of the expansion opening 25 is pressed by liquid to form the piston sealing ring 7 and the hole sealing ring 8 to expand along with the increase of the hydraulic pressure, at the moment, the piston sealing ring 7 tends to an expansion state in the piston sealing ring groove 6 and the hole sealing ring 8 in the hole sealing ring groove 9, and after the piston sealing ring 7 and the hole sealing ring 8 expand, a circle of annular force is formed between the piston cylinder inner ring 4 and the piston sealing ring groove 6 and between the hole sealing ring groove 9 and the piston outer ring 18 to enable the piston 5 to tend to be vertical to the plane circles of the piston cylinder inner ring 4 and the hole sealing ring groove 9, so that the piston lower extension end face 10 and the body outlet end inner cavity spigot 11 are kept in a parallel position; the piston 5 continues to move downwards, and the friction resistance between the outer ring 16 of the piston sealing ring and the inner ring 4 of the piston cylinder and between the inner ring 17 of the hole sealing ring and the outer ring 18 of the piston are in sliding contact sealing is increased due to the expansion of the piston sealing ring 7 and the hole sealing ring 8, so that the piston 5 is ensured not to shake when the distance between the extending end face 10 below the piston and the body outlet end inner cavity spigot 11 is close after the piston 5 moves downwards, and the valve is enabled to achieve the purposes that the extending end face 10 below the piston is parallel to the body outlet end inner cavity spigot 11 and the vibration-free anastomosis sealing is realized.

3. The inner cavity 12, the body inlet end inner cavity 19 and the body outlet end inner cavity 13 of the piston are connected through the pipeline 30, the first valve 31 and the second valve 32, when liquid flows from the body outlet end inner cavity 13 to the body inlet end inner cavity 19, the first valve 31 on the side of the body inlet end inner cavity 19 is opened, the second valve 32 on the side of the body outlet end inner cavity 13 is closed, the liquid in the body outlet end inner cavity 13 can not enter the inner cavity 12 of the piston, the liquid in the inner cavity 12 of the piston can flow into the valve body inlet end inner cavity 19 through the pipeline 30 and the first valve 31 on the side of the inlet end inner cavity 19, the liquid pressure in the inner cavity 12 of the piston is the same as the liquid pressure in the body inlet end inner cavity 19, and the area of the outer ring of the piston 5 is larger than the area of the inner ring of the body outlet end inner cavity spigot 11, as long as the liquid pressure in the inner cavity 13 of the body outlet end is greater than the liquid pressure in the inner cavity 19 of the inlet end, the resistance caused by the friction between the piston 5 and the vertically fixed connection of the extension end face 10 below the piston and the friction between the outer ring 16 of the piston sealing ring and the inner ring 4 of the piston cylinder as well as the inner ring 17 of the hole sealing ring and the outer ring 18 of the piston in sliding contact and sealing can be overcome, the piston 5 is pushed by the liquid in the inner cavity 13 of the body outlet end to move upwards, the extension end face 10 below the piston leaves the spigot 11 of the inner cavity of the body outlet end when the piston 5 moves upwards, the liquid in the inner cavity 13 of the body outlet end flows into the inner cavity 19 of the body inlet end through the spigot 11 of the inner cavity of the body outlet end, and the valve is opened; during the opening process of the valve, the liquid pressure in the inner cavity 13 of the body outlet end and the liquid pressure difference in the inner cavity 19 of the body inlet end are closer and closer, the direction of the expansion port 25 is stressed by liquid, the piston seal ring 7 and the hole seal ring 8 expand and contract along with the reduction of the hydraulic pressure, when the piston 5 moves to the point that the overall weight of the piston 5 vertically and fixedly connected with the lower extending end surface 10 of the piston and the resistance caused by the friction between the outer ring 16 of the piston seal ring and the sliding contact seal of the inner ring 17 of the hole seal ring and the outer ring 18 of the piston are large, the piston 5 does not move upwards, so as long as the conveying pressure in two flow directions of the liquid is the same, the opening degree of the valve is determined by the overall weight of the piston 5 vertically and fixedly connected with the lower extending end surface 10 of the piston and the resistance caused by the friction between the outer ring 16 of the piston seal ring and the inner ring 4 of the piston cylinder and the sliding contact seal of the inner ring 17 of the hole seal ring and the outer ring 18 of the piston, therefore, the valve can realize the flow from the inner cavity 13 of the body outlet end to the inner cavity 13 to the inner cavity 19 of the body inlet end, and the pressure loss of the body outlet end is also small, and the pressure loss of the inner cavity of the body outlet end of the valve can realize the bidirectional pressure loss of the bidirectional control rod under the bidirectional control rod, and the bidirectional pressure of the bidirectional pressure control rod of the bidirectional valve can be small.

4. The inner cavity 12 of the piston, the inner cavity 19 of the body inlet end and the inner cavity 13 of the body outlet end are connected through the pipeline 30, the first valve 31 and the second valve 32, when liquid flows from the inner cavity 13 of the body outlet end to the inner cavity 19 of the body inlet end, the first valve 31 on the side of the inner cavity 19 of the body inlet end is closed, the second valve 32 on the side of the inner cavity 13 of the body outlet end is opened, the liquid in the inner cavity 13 of the body outlet end enters the inner cavity 12 of the piston, the liquid in the inner cavity 12 of the piston can not flow into the inner cavity 19 of the valve body through the pipeline 30 and the first valve 31 on the side of the inner cavity 19 of the inlet end, and the liquid pressure in the inner cavity 12 of the piston is the same as the liquid pressure in the inner cavity 13 of the body outlet end, as long as the overall weight of the piston 5 vertically and fixedly connected with the lower extension end face 10 of the piston can overcome the resistance caused by the friction between the outer ring 16 of the piston sealing ring and the inner ring 4 of the piston cylinder and the sliding contact and sealing between the inner ring 17 of the hole sealing ring and the outer ring 18 of the piston, the piston 5 can move downwards, because the outer ring 16 of the piston sealing ring has elasticity to keep the elasticity of the contact and sealing between the outer ring 16 of the piston sealing ring and the inner ring 4 of the piston cylinder and the inner ring 17 of the hole sealing ring to be minimum when the piston sealing ring 7 and the hole sealing ring 8 are not pressed by liquid, the resistance caused by the friction is small, the piston 5 can move downwards under the action of self weight, the lower extension end face 10 of the piston is matched with the spigot 11 of the cavity at the body outlet end to seal and cut off the liquid flow direction of the cavity 13 at the body inlet end, the valve is closed, and the two-way closing of the liquid control valve of the non-diaphragm shaft rod shaft sleeve spring is realized.

Example 3

The diaphragm-free shaft sleeve spring liquid control valve is characterized in that a piston cylinder inner ring 4 is processed on a cover 1, a piston seal ring groove 6 is processed on a body 3, the piston cylinder inner ring 4 is processed on the body 3, the piston seal ring groove 6 is processed on the cover 1, the piston cylinder inner ring 4 is processed on the cover 1, the body 3, the piston seal ring groove 6 is processed on the cover 1, the body 3, the processing mode is one of three, a hole seal ring groove 9 is processed on a piston 5, the processed piston seal ring groove 6 and the processed hole seal ring groove 9 are 1 to more than 1 in number, the number of the installed piston seal rings 7 and the number of the installed hole seal rings 8 are the same as the number of the processed piston seal ring groove 6 and the processed hole seal ring groove 9, the installed hole seal ring grooves are matched in type, the cover 1 and the body 3 are fixedly connected into a whole by adopting a screw 26, and the seal is sealed by adopting a sealing strip 27, as shown in figures 9, 10 and 11.

Example 4

The diaphragm-free shaft sleeve spring liquid control valve is characterized in that a base 2 is additionally arranged between the cover 1 and the body 3, a piston cylinder inner ring 4 is processed on the base 2, a piston seal ring groove 6 is processed on the cover 1 and the body 3, the piston cylinder inner ring 4 is processed on the cover 1 and the body 3, the piston seal ring groove 6 is processed on the base 2, the processing mode is selected from two, a hole seal ring groove 9 is processed on a piston 5, the processed piston seal ring groove 6 and the processed hole seal ring groove 9 are 1-1 in number, the number of the installed piston seal rings 7 and the number of the installed hole seal rings 8 are the same as the number of the processed piston seal ring grooves 6 and the processed hole seal ring grooves 9, the piston seal rings are matched in type, the cover 1, the base 2 and the body 3 are fixedly connected into a whole by screws 26, and sealing is sealed by sealing strips 27. As shown in fig. 12 and 13.

Example 5

In the diaphragm-free shaft sleeve spring liquid control valve, a shaft 28 is arranged on the cover 1 and extends to the inner cavity 12 of the piston, the contact part between the shaft 28 and the cover 1 is sealed, and the shaft 28 can move up and down by rotating a hand wheel 29, as shown in fig. 14 and 15.

Further specific description of examples 1, 2, 3, 2, 4 and 5

Detailed description 1:

when the piston sealing ring 7 and the hole sealing ring 8 are installed, the piston sealing ring 7 and the hole sealing ring 8 need to be installed according to the flowing direction requirement of liquid, under the working condition, the liquid only needs to flow from the inner cavity 19 of the body inlet end to the inner cavity 13 of the body outlet end, the direction of the expansion port 25 faces to the inner cavity 12 of the piston, under the working condition, the liquid only needs to flow from the inner cavity 13 of the body outlet end to the inner cavity 19 of the body inlet end, and the direction of the expansion port 25 faces to the opposite direction of the inner cavity 12 of the piston; when the working condition requires that liquid flows in two directions, and the piston sealing ring 7 and the hole sealing ring 8 face the inner cavity 12 of the piston, the piston sealing ring 7 and the hole sealing ring 8 need to be provided with expansion ports 25 in two directions; through the processing structure of different piston seal ring grooves 6 and hole seal ring grooves 9 and the assembly form of the piston seal ring 7 and the hole seal ring 8, the requirement of various working conditions on the diaphragm-free shaft sleeve spring liquid control valve can be met.

Detailed description 2:

when the piston 5 and the piston lower extension end face 10 are vertically connected and fixed into a whole, the piston inner diameter opening 23 of the piston 5 is connected and fixed towards the inner cavity 12 of the piston or towards the opposite direction of the inner cavity 12 of the piston, so that the requirement of the diaphragm-free shaft rod shaft sleeve spring liquid control valve on the working condition can be met.

Specific description 3:

if the flow rate is to be statically adjusted, the structure forms of the figures 14 and 15 are provided.

The working principle is as follows:

in the diaphragm-free shaft sleeve spring liquid control valve flow limiting valve shown in fig. 14 and 15, the piston 5 has two installation forms, and the piston inner diameter opening 23 of the piston 5 placed in the piston sealing ring 7 and the hole sealing ring 8 faces towards the inner cavity 12 of the piston or the opposite direction of the inner cavity 12 of the piston; the shaft lever 28 can move up and down by rotating the hand wheel 29, the shaft lever 28 is moved to a set position, and the piston 5 can be propped by the shaft lever 28 after rising and can not rise any more, so that the lower extension end surface 10 of the piston and the body outlet end inner cavity spigot 11 can be kept at a set fixed opening, the flow between the lower extension end surface 10 of the piston and the body outlet end inner cavity spigot 11 is limited, and static flow limitation is realized.

Example 6

The diaphragm-free shaft-shaft sleeve spring liquid control valve is provided with an electric actuator 54, and the electric actuator 54 is used for executing valve opening and closing, as shown in figures 16 and 17.

The specific description is as follows:

the electric actuator 54 is used for opening and closing the valve, and the electric actuator 54 is used for replacing manual operation to open and close the valve, so that the control of the liquid control valve without the diaphragm shaft sleeve spring can be realized remotely: once the power is removed, actuator 54 can be removed and the valve opened and closed with conventional tools.

Example 7

The one-way single-shutoff valve of the liquid control valve without the diaphragm, the shaft sleeve and the spring of the diaphragm shaft is characterized in that the inner cavity 12 of the piston is connected with a three-way valve 33 through a pipeline 30, one outlet of the three-way valve 33 is connected into the inner cavity 19 at the inlet end through a pipeline 30 connector, and the other outlet is connected into the inner cavity 13 at the outlet end through a pipeline 30 connector. As shown in fig. 18.

The specific description is as follows: this embodiment can be used to assemble pipes and valves using any one of the basic structures and the machining form of the seal groove and the seal assembling structure of the present invention, as shown in fig. 18.

The specific description is as follows: the present embodiment can adopt any basic structure and processing structure of the piston cylinder inner ring, the piston seal groove and the hole seal groove and assembling structure of the piston seal and the hole seal in the invention to match pipelines and valves under the condition of following the basic principle of the invention, as shown in fig. 19.

1. When liquid flows from the inner cavity 19 of the body inlet end to the inner cavity 13 of the body outlet end, the switch position of the three-way ball valve 33 is arranged in the inner cavity 12 of the piston and the inner cavity 19 of the body inlet end to be closed, the inner cavity 12 of the piston and the inner cavity 13 of the body outlet end are opened, the liquid in the inner cavity 19 of the body inlet end cannot enter the inner cavity 12 of the piston through the pipeline 30 and the three-way ball valve 33, meanwhile, the liquid in the inner cavity 12 of the piston can enter the inner cavity 13 of the body outlet end through the three-way ball valve 33 and the pipeline 30, the piston 5 cannot be pressed at the moment, the extending end face 10 below the piston leaves the spigot 11 of the inner cavity 19 of the body outlet end under the pushing of the liquid in the inner cavity 19 of the body inlet end, the liquid in the inner cavity 19 of the body inlet end enters the inner cavity 13 of the body outlet end through the spigot 11 of the inner cavity of the body outlet end, and the valve is opened; the switch position of a three-way ball valve 33 is arranged in an inner cavity 12 of a piston and an inner cavity 19 of a body inlet end to be opened, the inner cavity 12 of the piston and an inner cavity 13 of the body outlet end are closed, liquid in the inner cavity 19 of the body inlet end enters the inner cavity 12 of the piston through a pipeline 30 and the three-way ball valve 33, meanwhile, the liquid in the inner cavity 12 of the piston cannot enter the inner cavity 13 of the body outlet end through the three-way ball valve 33 and the pipeline 30, the piston 5 moves downwards under pressure because the area of an outer ring of the piston 5 is larger than that of an inner ring of a spigot 11 of the inner cavity of the body outlet end, an extending end face 10 below the piston is matched with the spigot 11 of the inner cavity of the body outlet end after the piston 5 moves downwards to cut off the liquid flowing from the inner cavity 19 of the body inlet end to the inner cavity 13 of the body outlet end, and the valve is closed.

2. When liquid flows from the inner cavity 13 of the body outlet end to the inner cavity 19 of the body inlet end, the switch position of the three-way ball valve 33 is arranged in the inner cavity 12 of the piston and the inner cavity 19 of the body inlet end to be closed, the inner cavity 12 of the piston and the inner cavity 13 of the body outlet end are opened, the liquid in the inner cavity 13 of the valve body outlet end enters the inner cavity 12 of the piston through the pipeline 30 and the three-way ball valve 33, meanwhile, the liquid in the inner cavity 12 of the piston cannot enter the inner cavity 19 of the valve body inlet end through the three-way ball valve 33 and the pipeline 30, when the liquid pressure in the inner cavity 12 of the piston is the same as the liquid pressure in the inner cavity 13 of the body outlet end, the piston 5 moves downwards under the action of self-weight, the extending end face 10 below the piston is matched with the spigot 11 of the inner cavity of the body outlet end after the piston 5 moves downwards to seal and cut off the liquid flowing from the inner cavity 13 of the body outlet end to the inner cavity 19 of the body inlet end, and the valve is closed; the switch position of the three-way ball valve 33 is arranged in the inner cavity 12 of the piston and the inner cavity 19 of the body inlet end to be opened, the inner cavity 12 of the piston and the inner cavity 13 of the body outlet end are closed, liquid in the inner cavity 13 of the body outlet end cannot enter the inner cavity 12 of the piston through the pipeline 30 and the three-way ball valve 33, meanwhile, liquid in the inner cavity 12 of the piston enters the inner cavity 19 of the body inlet end through the three-way ball valve 33 and the pipeline 30, because the area of the outer ring of the piston 5 is larger than that of the inner ring of the spigot 11 of the inner cavity of the body outlet end, the piston 5 is pushed by the liquid in the inner cavity 13 of the body outlet end to move upwards, the extending end face 10 below the piston leaves the spigot 11 of the inner cavity of the body outlet end when the piston 5 moves upwards, the liquid in the inner cavity 13 of the body outlet end flows into the inner cavity 19 of the body inlet end through the spigot 11 of the inner cavity of the body outlet end, and the valve is opened.

3. The specific description is as follows: when liquid flows from the body inlet end inner cavity 19 to the body outlet end inner cavity 13 or when liquid flows from the body outlet end inner cavity 13 to the body inlet end inner cavity 19, after the three-way ball valve 33 is operated, the liquid flow direction can only be towards one direction, and the other direction is not, so that the three-way ball valve only has the functions of one-way communication and one-way interception.

Example 8

In the one-way double-throttle valve of the liquid control valve without the diaphragm shaft sleeve and the spring, the inner cavity 12 of the piston is connected with a three-way valve 33 through a pipeline 30, one outlet of the three-way valve 33 is connected with an inlet end inner cavity 19 through the pipeline 30 and a check valve 34, and the other outlet is connected with an outlet end inner cavity 13 through the pipeline 30, as shown in fig. 19.

The specific description is as follows: the present embodiment can adopt any basic structure and processing structure of the piston cylinder inner ring, the piston seal groove and the hole seal groove and assembling structure of the piston seal and the hole seal in the invention to match the pipeline and the valve under the condition of following the basic principle of the invention, as shown in fig. 19.

1. When liquid flows from the body inlet end inner cavity 19 to the body outlet end inner cavity 13, the switch position of the three-way ball valve 33 is arranged between the inner cavity 12 of the piston and the body inlet end inner cavity 19 to be closed, the inner cavity 12 of the piston and the body outlet end inner cavity 13 are opened, the liquid in the body inlet end inner cavity 19 cannot enter the inner cavity 12 of the piston through the pipeline 30, the check valve 34 and the three-way ball valve 33, meanwhile, the liquid in the inner cavity 12 of the piston can enter the body outlet end inner cavity 19 through the three-way ball valve 33 and the pipeline 30, at the moment, the piston 5 cannot be pressed, the extending end face 10 below the piston leaves the valve body outlet end inner cavity spigot 11 under the pushing of the liquid in the body inlet end inner cavity 19, the liquid in the body inlet end inner cavity 19 enters the body outlet end inner cavity 13 through the outlet end inner cavity spigot 11, and the valve is opened; the switch position of the three-way ball valve 33 is arranged in the inner cavity 12 of the piston and the inner cavity 19 of the body inlet end to be opened, the inner cavity 12 of the piston and the inner cavity 13 of the valve body outlet end to be closed, liquid in the inner cavity 19 of the body inlet end enters the inner cavity 12 of the piston through the pipeline 30, the check valve 34 and the three-way ball valve 33, meanwhile, the liquid in the inner cavity 12 of the piston cannot enter the inner cavity 13 of the body outlet end through the three-way ball valve 33 and the pipeline 30, the piston 5 moves downwards under pressure because the area of the outer ring of the piston 5 is larger than that of the inner ring of the body outlet end inner cavity spigot 11, the extending end face 10 below the piston matches with the body outlet end inner cavity spigot 11 after the piston 5 moves downwards to seal and cut off the liquid flowing from the inner cavity 19 of the body inlet end to the inner cavity 13 of the body outlet end, and the valve is closed.

2. When liquid flows from the body outlet end inner cavity 13 to the body inlet end inner cavity 19, the switch position of the three-way ball valve 33 is arranged between the inner cavity 12 of the piston and the body inlet end inner cavity 19 and the inner cavity 12 of the piston and the body outlet end inner cavity 13 are opened, the liquid in the body outlet end inner cavity 12 enters the inner cavity 12 of the piston through the pipeline 30 and the three-way ball valve 33, meanwhile, the liquid in the inner cavity 12 of the piston cannot enter the body inlet end inner cavity 19 through the three-way ball valve 33, the check valve 34 and the pipeline 30, when the liquid pressure in the inner cavity 12 of the piston is the same as the liquid pressure in the body outlet end inner cavity 13, the piston 5 moves downwards under the action of self weight, the extending end face 10 below the piston is matched with the body outlet end inner cavity spigot 11 after the piston 5 moves downwards to seal and cut off the liquid flowing from the body outlet end inner cavity 13 to the body inlet end inner cavity 19, and the valve is closed; the switch position of the three-way ball valve 33 is arranged in the inner cavity 12 of the piston and the inner cavity 19 of the body inlet end to be opened, the inner cavity 12 of the piston and the inner cavity 13 of the body outlet end are closed, liquid in the inner cavity 13 of the body outlet end cannot enter the inner cavity 12 of the piston through the pipeline 30 and the three-way ball valve 33, and liquid in the inner cavity 12 of the piston cannot enter the inner cavity 19 of the body inlet end through the three-way ball valve 33, the check valve 34 and the pipeline 30, so that the piston 5 cannot be pressed to move, the valve cannot be opened, and the purposes of one-way communication and two-way flow stopping are achieved.

Example 9

The non-diaphragm shaft sleeve spring liquid control valve is a check valve and a shutoff valve, the inner cavity 12 of the piston is connected with the inlet end inner cavity 19 through a pipeline 30 and an inlet end two-way valve 35, and the inner cavity 12 of the piston is connected with the outlet end inner cavity 13 through a pipeline 30 and an outlet end two-way valve 36. As shown in fig. 20.

The specific description is as follows: the present embodiment can adopt any basic structure and processing structure of the piston cylinder inner ring, the piston seal groove and the hole seal groove and assembling structure of the piston seal and the hole seal in the invention to match the pipeline and the valve under the condition of following the basic principle of the invention, as shown in fig. 20.

1. When liquid flows from the body inlet end inner cavity 19 to the body outlet end inner cavity 13, the inlet end two-way valve 35 is closed, the outlet end two-way valve 36 is opened, the liquid in the body inlet end inner cavity 19 cannot flow into the inner cavity 12 of the piston, the liquid in the inner cavity 12 of the piston can flow into the body outlet end inner cavity 12 through the pipeline 30 and the outlet end two-way valve 36, at the moment, the piston 5 cannot be pressed, the extending end face 10 below the piston leaves the body outlet end inner cavity spigot 11 under the pushing of the liquid in the valve body inlet end inner cavity 19, the liquid in the body inlet end inner cavity 19 enters the body outlet end inner cavity 13 through the valve body outlet end inner cavity spigot 11, and the valve is opened; when liquid flows from the inner cavity 13 of the body outlet end to the inner cavity 19 of the valve body inlet end, the liquid pressure in the inner cavity 12 of the piston depends on the liquid in the inner cavity 13 of the body outlet end entering the inner cavity 12 of the piston, when the liquid pressure in the inner cavity 12 of the piston is the same as the liquid pressure in the inner cavity 13 of the body outlet end, the piston 5 can move downwards under the action of self weight, the extending end surface 10 below the piston is matched with the spigot 11 of the inner cavity of the body outlet end after the piston 5 moves downwards to seal and cut off the liquid in the inner cavity 13 of the valve body outlet end from flowing to the inner cavity 19 of the body inlet end, and the valve is closed, so that the purpose of non-return is achieved.

2. When liquid flows from the body outlet end inner cavity 13 to the body inlet end inner cavity 19, the outlet end two-way valve 36 is closed, the inlet end two-way valve 35 is opened, the liquid in the body outlet end inner cavity 13 cannot flow into the inner cavity 12 of the piston, the liquid in the inner cavity 12 of the piston can flow into the valve body inlet end inner cavity 19 through the pipeline 30 and the inlet end two-way valve 35, the piston 5 is pushed by the liquid in the valve body outlet end inner cavity 13 to move upwards due to the fact that the area of an outer ring of the piston 5 is larger than that of an inner ring of the body outlet end inner cavity spigot 11, the piston lower extending end face 10 is separated from the body outlet end inner cavity spigot 11 when the piston 5 moves upwards, the liquid in the body outlet end inner cavity 13 flows into the body inlet end inner cavity 19 through the body outlet end inner cavity spigot 11, and the valve is opened; when liquid flows from the inner cavity 19 of the body inlet end to the inner cavity 13 of the body outlet end, the pressure of the liquid in the inner cavity 12 of the piston depends on the size of the liquid in the inner cavity 19 of the body inlet end entering the inner cavity 12 of the piston, when the pressure in the inner cavity 12 of the piston is the same as the pressure in the inner cavity 19 of the body inlet end, because the area of the outer ring of the piston 5 is larger than that of the inner ring of the inner cavity spigot 11 of the body outlet end, the piston 5 can move downwards under the action of the liquid pressure, the extending end surface 10 below the piston is matched with the spigot 11 of the inner cavity of the body outlet end after the piston 5 moves downwards to seal and cut off the liquid in the inner cavity 19 of the body inlet end from flowing to the inner cavity 13 of the body outlet end, and the valve is closed, so that the purpose of non-return is achieved.

3. The specific description is as follows: when liquid flows from the body inlet end inner cavity 19 to the body outlet end inner cavity 13, or when liquid flows from the body outlet end inner cavity 13 to the body inlet end inner cavity 19, the inlet end two-way valve 35 and the outlet end two-way valve 36 are operated, one of the two-way valves is opened, the other two-way valve is closed, and one liquid flowing direction is closed, so that the liquid flow stopping and intercepting functions are achieved.

Example 10

The diaphragm-free shaft-rod shaft-sleeve spring liquid control valve is a two-way single-shutoff valve, an inner cavity 12 of a piston is connected with an inlet inner cavity 19 through a pipeline 30, an inlet two-way valve 35 and a semi-closed check valve 37, and the inner cavity 12 of the piston is connected with an outlet inner cavity 13 through the pipeline 30, an outlet two-way valve 36 and the semi-closed check valve 37, as shown in fig. 21.

The specific description is as follows: the present embodiment can adopt any basic structure and processing structure of the piston cylinder inner ring, the piston seal groove and the hole seal groove and assembling structure of the piston seal and the hole seal in the invention to match pipelines and valves under the condition of following the basic principle of the invention, as shown in fig. 21.

1. When liquid flows from the body inlet end inner cavity 19 to the body outlet end inner cavity 13, the inlet end two-way valve 35 and the outlet end two-way valve 36 are opened, at this time, the semi-closed check valve 37 arranged on the pipeline 30 of the body inlet end inner cavity 19 is closed in a non-return mode by a half, the semi-closed check valve 37 arranged on the pipeline 30 of the body outlet end inner cavity 13 is fully opened, the liquid in the body inlet end inner cavity 19 enters the inner cavity 12 of the piston through the pipeline 30, the semi-closed check valve 37, the inlet end two-way valve 35 and the pipeline 30, because the semi-closed check valve 37 arranged on the pipeline 30 of the body outlet end inner cavity 13 is fully opened, the amount of the liquid entering the inner cavity 12 of the piston is smaller than the amount flowing into the body outlet end inner cavity 13, the piston 5 cannot be pressed, the extending end face 10 below the piston leaves the body outlet end inner cavity spigot 11 under the push of the liquid in the body inlet end inner cavity 19, the liquid in the body inlet end inner cavity 19 enters the body outlet end inner cavity 13 through the body outlet end inner cavity spigot 11, and the valve is opened; opening the inlet two-way valve 35, closing the outlet two-way valve 36, wherein at this time, half-closed check valve 37 mounted on the pipeline 30 of the valve body inlet inner cavity 19 is half of check closed without all check, so that the liquid in the valve body inlet inner cavity 19 can enter the inner cavity 12 of the piston through the half-closed check valve 37, the inlet two-way valve 35 and the pipeline 30, because the outlet two-way valve 36 is closed, the liquid in the valve body inlet inner cavity 19 cannot flow into the valve body outlet inner cavity 13, the area of the outer ring of the piston 5 is larger than that of the inner ring of the valve body outlet inner cavity spigot 11, the piston 5 moves downwards under pressure, the extension end face 10 below the piston matches with the valve body outlet inner cavity spigot 11 after the piston 5 moves downwards to seal and cut off the liquid flowing from the valve body inlet inner cavity 19 to the valve body outlet inner cavity 13, and the valve is closed.

2. When liquid flows from the body outlet end inner cavity 13 to the body inlet end inner cavity 19, the inlet end two-way valve 35 and the outlet end two-way valve 36 are opened, the semi-closed check valve 37 mounted on the pipeline 30 of the body outlet end inner cavity 13 is closed by a half in a non-return manner, the semi-closed check valve 37 mounted on the pipeline 30 of the body inlet end inner cavity 19 is fully opened, the liquid in the body outlet end inner cavity 13 enters the inner cavity 12 of the piston through the pipeline 30, the semi-closed check valve 37, the outlet end two-way valve 36 and the pipeline 30, because the semi-closed check valve 37 mounted on the pipeline 30 of the body inlet end inner cavity 19 is fully opened, the amount of the liquid entering the inner cavity 12 of the piston is smaller than the amount flowing to the body inlet end inner cavity 19, because the area of the outer ring of the piston 5 is larger than the area of the inner ring of the body outlet end inner cavity spigot 11, the piston 5 is pushed by the liquid in the body outlet end inner cavity 13 to move upwards, the piston lower extending end surface 10 leaves the body outlet end inner cavity spigot 11 when the piston 5 moves upwards, and the liquid in the body outlet end inner cavity 13 flows to the body inlet end inner cavity 19 through the body outlet end inner cavity spigot 11 and opens the valve 19; closing the inlet two-way valve 35, opening the outlet two-way valve 36, and at this time, half of the half-closed check valve 37 mounted on the pipeline 30 of the valve body outlet inner cavity 13 is closed, but not completely closed, so that the liquid in the valve body outlet inner cavity 13 can enter the inner cavity 12 of the piston through the pipeline 30, the half-closed check valve 37, the outlet two-way valve 36 and the pipeline 30, because the inlet two-way valve 35 is closed, the liquid in the body outlet inner cavity 13 can not flow to the body inlet inner cavity 19 from the inner cavity 12 of the piston, when the liquid pressure in the inner cavity 12 of the piston is the same as the liquid pressure in the body outlet inner cavity 13, the piston 5 can move downwards under the action of the self weight, the extending end surface 10 below the piston matches with the body outlet inner cavity spigot 11 after the piston 5 moves downwards, the liquid in the body outlet inner cavity 13 is sealed and cut off to flow to the valve body inlet inner cavity 19, and the valve is closed.

3. The specific description is as follows: when liquid flows to the body inlet end inner cavity 13 from the body inlet end inner cavity 19 or when liquid flows to the body inlet end inner cavity 19 from the body outlet end inner cavity 13, the inlet end two-way valve 35 and the outlet end two-way valve 36 are opened, the liquid can pass through the valves in two directions, one of the two-way valves is closed, the liquid in one direction can be closed, and therefore the valve has the function that the liquid can pass through the valves in two directions and is intercepted in one direction.

Example 11

According to the diaphragm-free shaft sleeve spring liquid control valve bidirectional double-shutoff valve, an inner cavity 12 of a piston is connected with a tee joint I39 through a two-way valve I38, two outlets of the tee joint I39 are respectively provided with a check valve 34, an outlet of one check valve 34 is connected with an inlet end inner cavity 19 through a pipeline 30 connector, an outlet of one check valve 34 is connected with an outlet end inner cavity 13 through a pipeline 30 connector, the inner cavity 12 of the piston is connected with a tee joint II 41 through a two-way valve II 40, two outlets of the tee joint II 41 are respectively provided with one check valve 34, an outlet of one check valve 34 is connected with the inlet end inner cavity 19 of a valve body through a pipeline 30, and an outlet of one check valve 34 is connected with the outlet end inner cavity 13 through a pipeline 30 connector, as shown in fig. 22.

The specific description is as follows: the present embodiment can adopt any basic structure and processing structure of the piston cylinder inner ring, the piston seal groove and the hole seal groove and assembling structure of the piston seal and the hole seal in the invention to match the pipeline and the valve under the condition of following the basic principle of the invention, as shown in fig. 22.

1. When the liquid flows from the body inlet end inner cavity 19 to the body outlet end inner cavity 13, the two-way valve I38 is closed, the two-way valve II 40 is opened, and under the state, the two-way valve I38 cuts off the liquid of the body inlet end inner cavity 19 and the body outlet end inner cavity 13 connected with the three-way valve I39 and enters the inner cavity 12 of the piston; the two-way valve II 40 is in an open state, the tee joint II 41 connected with the two-way valve II 40 is connected with the body inlet end inner cavity 19 through the check valve 34 and the pipeline 30, but the check valve 34 is used for stopping the body inlet end inner cavity 19, so that liquid in the body inlet end inner cavity 19 cannot enter the inner cavity 12 of the piston; the two-way valve II 40 is in an open state, the three-way valve II 41 connected with the two-way valve II 40 does not check the liquid in the inner cavity 12 of the slave piston through the check valve 34 and the check valve 34 of the outlet end inner cavity 13 of the pipeline 30 connector, so that the liquid in the inner cavity 12 of the piston can flow into the body outlet end inner cavity 13 through the two-way valve II 40 and the three-way valve II 41 through the check valve 34 and the pipeline 30, the piston 5 cannot be pressed at the moment, the extending end face 10 below the piston leaves the body outlet end inner cavity spigot 11 under the pushing of the liquid in the body inlet end inner cavity 19, the liquid in the body inlet end inner cavity 19 enters the body outlet end inner cavity 13 through the body outlet end inner cavity spigot 11, and the valve is opened.

2. When the liquid flows from the body outlet end inner cavity 13 to the body inlet end inner cavity 19, the two-way valve I38 is closed, the two-way valve II 40 is opened, and under the state, the two-way valve I38 cuts off the liquid in the body inlet end inner cavity 19 and the body outlet end inner cavity 13 which are connected by the three-way valve I39, and the liquid enters the inner cavity 12 of the piston; the two-way valve II 40 is in an open state, a tee joint II 41 connected with the two-way valve II 40 is connected with the inner cavity 13 at the outlet end of the valve body through the check valve 34 and the pipeline 30, but the check valve 34 stops the check of the inner cavity 13 at the outlet end of the valve body, so that liquid in the inner cavity 13 at the outlet end of the valve body cannot enter the inner cavity 12 of the piston; the two-way valve II 40 is in an open state, the three-way valve II 41 connected with the two-way valve II 40 is connected with the check valve 34 of the inlet end inner cavity 19 through the check valve 34 and the pipeline 30 and does not return liquid in the inner cavity 12 of the piston, so that the liquid in the inner cavity 12 of the piston can flow into the body inlet end inner cavity 19 through the two-way valve II 40 and the three-way valve II 41 through the check valve 34 and the pipeline 30, the piston 5 is pushed by the liquid in the body outlet end inner cavity 13 to move upwards due to the fact that the area of the outer ring of the piston 5 is larger than that of the inner ring of the body outlet end inner cavity spigot 11, the piston lower extending end face 10 leaves the body outlet end inner cavity spigot 11 when the piston 5 moves upwards, the liquid in the body outlet end inner cavity 13 flows into the body inlet end inner cavity 19 through the body outlet end inner cavity spigot 11, and the valve is opened.

3. When liquid flows from the body inlet end inner cavity 19 to the body outlet end inner cavity 13, the two-way valve I38 is opened, the two-way valve ii 40 is closed, in this state, the two-way valve ii 40 disconnects the liquid in the body inlet end inner cavity 19 and the body outlet end inner cavity 13 connected by the three-way valve ii 41, and enters the inner cavity 12 of the piston, the two-way valve I38 is in an open state, the three-way valve I39 connected to the two-way valve I38 is connected to the outlet end inner cavity 13 through the check valve 34 and the pipeline 30, but the check valve 34 does not check the liquid in the inner cavity 12 of the piston, so that the liquid in the body inlet end inner cavity 19 cannot enter the body outlet end inner cavity 13, the two-way valve I38 is in an open state, the area of the ring of the piston 5 is larger than the area of the ring of the body outlet end inner cavity 11, the volume of the piston 5 moves downward under the pressure, and the piston 5 moves to close the inner cavity 12 of the piston after the liquid outlet end cavity 13 is closed, and the piston 5 moves downward under the pressure.

4. When liquid flows from the body inlet end inner cavity 13 to the body inlet end inner cavity 19, the two-way valve I38 is opened, the two-way valve II 40 is closed, in this state, the two-way valve I38 cuts off the liquid in the body inlet end inner cavity 19 and the body outlet end inner cavity 13 which are connected by the three-way valve I39, the two-way valve I38 is in an open state, the three-way valve I39 connected with the two-way valve I38 is connected with the body inlet end inner cavity 19 through the check valve 34 and the pipeline 30, but the check valve 34 does not check the liquid in the inner cavity 12 of the piston, so the liquid in the body outlet end inner cavity 13 cannot enter the body inlet end inner cavity 19, the two-way valve I38 is in an open state, the three-way valve I39 connected with the two-way valve I38 passes through the check valve 34 and the connector outlet end inner cavity 13 of the pipeline 30, but the check valve 34 does not check the liquid in the body outlet end inner cavity 13, so the liquid in the body outlet end inner cavity 13 can enter the inner cavity 12 of the piston, when the liquid pressure in the inner cavity 12 of the piston is the same as the liquid pressure in the body outlet end inner cavity 13, the body, the piston 5 moves downwards under the self-weight, and the effect of the piston 5, the piston 5 moves to close the end inner cavity 11, and the end inner cavity 11 after the liquid flows to close the end inner cavity 11 and the end of the piston, and the end cavity 11.

5. The specific description is as follows: when liquid flows from the body inlet end inner cavity 19 to the body outlet end inner cavity 13 or when liquid flows from the body outlet end inner cavity 13 to the body inlet end inner cavity 19, the two-way valve I38 is closed, the two-way valve II 40 is opened, and the fluid can flow in two directions; the two-way valve I38 is opened, the two-way valve II 40 is closed, and the valves can be closed in both directions. Therefore, the valve has the functions of enabling liquid to pass through the valve in two directions and stopping the flow in two directions.

Example 12

In the diaphragm-free shaft sleeve spring liquid control valve float valve, the inner cavity 12 of the piston is connected with the inlet end inner cavity 19 through the pipeline 30 and the inlet end two-way valve 35, the inner cavity 12 of the piston is connected with the float valve 42 through the outlet end two-way valve 36 and the pipeline 30, and the flange 43 of the body outlet end inner cavity is connected with the pipeline 44 to the liquid pool 45, as shown in fig. 23.

The specific description is as follows: the embodiment can adopt any one basic structure, a piston cylinder inner ring, a piston seal ring groove, a machining structure of a hole seal ring groove and an assembling structure of a piston seal ring and a hole seal ring to be matched with a pipeline and a valve under the condition of following the basic principle of the invention. As shown in fig. 23.

Liquid flows from the body inlet end inner cavity 19 to the body outlet end inner cavity 13, the inlet end two-way valve 35 and the outlet end two-way valve 36 are opened, the opening degree of the inlet end two-way valve 35 is smaller than that of the outlet end two-way valve 36, the liquid in the body inlet end inner cavity 19 enters the inner cavity 12 of the piston through the pipeline 30 and the inlet end two-way valve 35, and then enters the air in the liquid pool 45 through the outlet end two-way valve 36, the pipeline 30 and the ball float valve 42, at the moment, the piston 5 cannot be pressed, the extending end face 10 below the piston leaves the body outlet end inner cavity spigot 11 under the pushing of the liquid in the body inlet end inner cavity 19, the liquid in the body inlet end inner cavity 19 enters the body outlet end inner cavity 13 through the body outlet end inner cavity spigot 11, and enters the liquid pool 45 through the pipeline 44 connected with the flange 43 of the body outlet end inner cavity; when the liquid in the liquid pool 45 rises to the float valve 42, the float valve 42 is closed, the liquid in the body inlet end inner cavity 19 enters the inner cavity 12 of the piston through the inlet end two-way valve 35 and the pipeline 30, and then the liquid cannot enter the air in the liquid pool 45 through the outlet end two-way valve 36, the pipeline 30 and the float valve 42, because the area of the outer ring of the piston 5 is larger than that of the inner ring of the body outlet end inner cavity spigot 11, the piston 5 moves downwards under pressure, the piston lower extension end surface 10 is matched with the body outlet end inner cavity spigot 11 after the piston 5 moves downwards to seal and cut off the liquid flowing from the body inlet end inner cavity 19 to the body outlet end inner cavity 13, and the valve is closed.

Example 13

The diaphragm-free shaft rod shaft sleeve spring liquid control valve is a flow limiting valve and a check valve, an inner cavity 12 of a piston is connected with one outlet of a hand wheel three-way pilot valve 46 through a check valve 34 and a pipeline 30, the other outlet of the hand wheel three-way pilot valve 46 is connected with a liquid inlet 48 of a pump 47 through the pipeline 30, an inlet of the hand wheel three-way pilot valve 46 is connected with an inlet inner cavity 19 through the pipeline 30 and an inlet two-way valve 35 connector, a hand wheel 49 is arranged on the hand wheel three-way pilot valve 46, and the inner cavity 12 of the piston is connected with an outlet inner cavity 13 through the pipeline 30 and an outlet two-way valve 36 connector. As shown in fig. 24.

The specific description is as follows: the present embodiment can adopt any basic structure and processing structure of the piston cylinder inner ring, the piston seal groove and the hole seal groove and assembling structure of the piston seal and the hole seal groove in the invention, and pipes, valves and pilot valves are matched under the condition of following the basic principle of the invention, as shown in fig. 24.

The working principle is as follows:

1. starting the pump 47, allowing the liquid to flow from the body inlet end inner cavity 19 to the body outlet end inner cavity 13, opening the inlet end two-way valve 35 and the outlet end two-way valve 36, and setting the opening degree of the inlet end two-way valve 35 to be smaller than that of the outlet end two-way valve 36, so that the piston 5 cannot be pressed, the end surface 10 extending below the piston leaves the body outlet end inner cavity spigot 11 under the pushing of the liquid in the body inlet end inner cavity 19, the liquid in the body inlet end inner cavity 19 enters the body outlet end inner cavity 13 through the body outlet end inner cavity spigot 11, and the valve is opened; the pressure of the inner cavity 13 at the outlet end of the valve body is ensured to be at a set value by adjusting the hand wheel 49 to ensure that the flow rate of the liquid in the inlet end 48 of the pump 47, which enters the hand wheel three-way pilot valve 46 through the pipeline 30 and the check valve 34, enters the inner cavity 12 of the piston; when the liquid flow in the inlet end 48 of the pump 47 changes, the sensing die in the hand wheel three-way pilot valve 46 controls the liquid entering the inner cavity 12 of the piston through the pipeline 30 and the check valve 34, so that the opening degree of the piston 5 changes, the pressure in the inner cavity 13 of the outlet end of the body cannot change along with the change of the liquid flow in the inlet end 48 of the pump 47, and the purpose of flow limitation is achieved.

2. When the pump 47 is turned off and the liquid flows from the body outlet end inner cavity 13 to the body inlet end inner cavity 19, the check valve 34 does not check the inner cavity 12 of the piston, the liquid in the inner cavity 12 of the piston does not flow to the body inlet end inner cavity 19 through the check valve 34, the pipeline 30, the hand wheel three-way pilot valve 46 and the inlet two-way valve 35 and does not flow to the inlet end 48 of the pump 47 through the pipeline 30, the liquid in the body outlet end inner cavity 13 enters the inner cavity 12 of the piston through the outlet two-way valve 36 and the pipeline 18, when the liquid pressure in the inner cavity 12 of the piston is the same as the liquid pressure in the body outlet end inner cavity 13, the piston 5 moves downwards under the action of the dead weight, the extending end surface 10 below the piston is matched with the body outlet end inner cavity spigot 11 after the piston 5 moves downwards to seal and cut off the liquid flowing from the body outlet end inner cavity 13 to the body inlet end inner cavity 19, and the valve is closed, so that the purpose of check is achieved.

Example 14

The diaphragm-free shaft sleeve spring liquid control valve pressure reducing and stabilizing valve is characterized in that an inner cavity 12 of a piston is connected with one inlet of a two-way valve 50 through a pipeline 30, an outlet of the two-way valve 50 passes through an outlet two-way valve 36 and an outlet inner cavity 13 of a pipeline 30 connector, the inner cavity 12 of the piston passes through a pipeline 30 and an inlet two-way valve 35 connector and enters an inner cavity 19, and a screw 51 is arranged at the top of the two-way valve 50. As shown in fig. 25.

The specific description is as follows: the present embodiment can adopt any basic structure and processing structure of the piston cylinder inner ring, the piston seal groove and the hole seal groove and assembling structure of the piston seal and the hole seal groove in the invention, and pipes, valves and pilot valves are matched under the condition of following the basic principle of the invention, as shown in fig. 25.

The working principle is as follows:

liquid flows from the body inlet end inner cavity 19 to the body outlet end inner cavity 13, the inlet end two-way valve 35 and the outlet end two-way valve 36 are opened, the opening degree of the inlet end two-way valve 35 is set to be smaller than that of the outlet end two-way valve 36, at the moment, the piston 5 is not pressed, the extending end face 10 below the piston is pushed by the liquid in the body inlet end inner cavity 19 to leave the body outlet end inner cavity spigot 11, the liquid in the body inlet end inner cavity 19 enters the body outlet end inner cavity 13 through the body outlet end inner cavity spigot 11, and the valve is opened; the flow rate of the liquid in the inner cavity 12 of the piston into the body outlet end inner cavity 13 through the outlet end two-way valve 36 can be set to a value by adjusting the screw rod 51 on the two-way valve 50, so that the liquid pressure of the body outlet end inner cavity 13 is fixed at a set value; when the liquid pressure in the body outlet end cavity 13 changes, the sensing module in the two-way valve 50 can control the flow entering the body outlet end cavity 13 from the inner cavity 12 of the piston, so that the opening degree of the piston 5 changes along with the change of the liquid pressure in the body outlet end cavity 13, and the purposes of pressure reduction and pressure stabilization are achieved.

Example 15

The diaphragm-free shaft rod shaft sleeve spring liquid control valve relief valve is characterized in that an inner cavity 12 of a piston is connected with one outlet of a three-way pilot valve 52 through a pipeline 30, the other outlet of the three-way pilot valve 52 is connected with an outlet inner cavity 13 through an outlet two-way valve 36 and a pipeline 30, an inlet inner cavity 19 of a body inlet is connected with an inlet of the three-way pilot valve 52 through an inlet two-way valve 35 and the pipeline 30, the inner cavity 12 of the piston is connected with the outlet inner cavity 13 through a two-way valve III 53 and a pipeline 30, and a screw 51 is arranged at the top of the three-way pilot valve 52. As shown in fig. 26.

The specific description is as follows: the present embodiment can adopt any basic structure and processing structure of the piston cylinder inner ring, the piston seal groove and the hole seal groove and assembling structure of the piston seal and the hole seal groove in the invention, and pipes, valves and pilot valves are matched under the condition of following the basic principle of the invention, as shown in fig. 26.

The working principle is as follows:

1. the liquid flows from the body outlet end inner cavity 13 to the body inlet end inner cavity 19, and the inlet end two-way valve 35, the outlet end two-way valve 36 and the two-way valve III 53 are opened; the liquid in the inner cavity 13 of the body outlet end enters the inner cavity 12 of the piston through the pipeline 30 and the two-way valve III 53 and enters the three-way pilot valve 52 through the pipeline 30 and the outlet end two-way valve 36; when the pressure in the body outlet end inner cavity 13 rises to a set value, the top screw 51 of the three-way pilot valve 52 is adjusted to a certain position, when the pressure in the body outlet end inner cavity 13 enters the three-way pilot valve 52 through the pipeline 30 and the outlet end two-way valve 36 to open the pipeline of the three-way pilot valve 32 connecting the pipeline 30 and the inlet end two-way valve 35, the inner cavity 12 of the communicating piston enters the pipeline of the three-way pilot valve 52 through the pipeline 30 to discharge the liquid in the inner cavity 12 of the piston into the body inlet end inner cavity 19, the liquid quantity of the liquid in the body outlet end inner cavity 13 entering the inner cavity 12 of the piston from the pipeline 30 and the two-way valve III 53 is set to be smaller than the liquid quantity discharged into the body inlet end inner cavity 19 from the inner cavity 12 of the piston, because the outer ring area of the piston 5 is larger than the inner ring area of the body outlet end inner cavity spigot 11, the piston 5 is pushed by the liquid in the body outlet end inner cavity 13 to move upwards, the piston lower extension end surface 10 leaves the body outlet end inner cavity 11 when the piston 5 moves upwards, and the purpose of opening the pressure relief valve inner cavity 19 is achieved.

2. When the liquid pressure in the valve body outlet end inner cavity 13 is lower than the set value, the liquid pressure in the body outlet end inner cavity 13 cannot open the pipeline of the three-way pilot valve 52 connected with the pipeline 30 and the inlet two-way valve 35 through the pipeline 30 and the liquid pressure in the outlet two-way valve 36 and the pipeline of the three-way pilot valve 52 connected with the inner cavity 12 of the piston through the pipeline 30, so that the liquid in the inner cavity 12 of the piston cannot be discharged into the body inlet end inner cavity 19, but the liquid in the body outlet end inner cavity 13 can enter the inner cavity 12 of the piston through the pipeline 30 and the two-way valve III 53, when the liquid pressure in the inner cavity 12 of the piston is the same as the liquid pressure in the body outlet end inner cavity 13, the piston 5 moves downwards under the self-weight effect, the extending end surface 10 below the piston moves downwards to be matched with the valve body outlet end inner cavity spigot 11 to seal and cut off the liquid flowing to the body outlet end inner cavity 13 to the body inlet end inner cavity 19, the valve is closed, and the valve is not released.

Claims

1. A diaphragm-free shaft sleeve spring liquid control valve comprises a cover (1), a body (3), a piston cylinder inner ring (4), a piston (5), a piston seal ring groove (6), a piston seal ring (7), a hole seal ring (8), a hole seal ring groove (9), an extending end face (10) below the piston and a body outlet end inner cavity spigot (11); the method is characterized in that:

the piston sealing ring groove (6) is formed in the piston (5), the piston sealing ring (7) is installed in the piston sealing ring groove (6), the hole sealing ring (8) is installed in the hole sealing ring groove (9), and the piston (5) is arranged in the piston cylinder inner ring (4) and the hole sealing ring (8);

the arrangement mode of the piston cylinder inner ring (4) adopts one of the following seven forms:

is arranged on the position of the piston (55) corresponding to the cover (1),

is arranged at the position of the piston (55) corresponding to the body (3),

at the same time, the piston (55) is arranged at the position corresponding to the cover (1) and the body (3),

is arranged at the position where the piston (55) corresponds to the seat (2), wherein the seat (2) is positioned between the cover (1) and the body (3),

at the same time, the piston (55) is arranged at the position corresponding to the cover (1) and the seat (2),

at the same time, the piston (55) is arranged at the position corresponding to the seat (2) and the body (3),

the piston (55) is arranged at the position corresponding to the cover (1), the seat (2) and the body (3);

the arrangement mode of the hole sealing ring groove (9) adopts one of the following seven modes:

is arranged on the cover (1) and is provided with a plurality of grooves,

is arranged on the body (3),

is arranged on the cover (1) and the body (3) at the same time,

is arranged on the seat (2) and is provided with a plurality of grooves,

are arranged on the cover (1) and the seat (2) at the same time,

are arranged on the seat (2) and the body (3) at the same time,

set up simultaneously on lid (1), seat (2) and body (3):

the piston (5) and the extending end surface (10) below the piston are integrated, and the cover (1) and the body (3) or the cover (1), the seat (2) and the body (3) are sealed into a whole;

the inner ring (14) of the piston sealing ring is sealed with the piston sealing ring groove (6), the outer ring (15) of the hole sealing ring is sealed with the hole sealing ring groove (9), and the outer ring (16) of the piston sealing ring is statically sealed and slidably sealed with the inner ring (4) of the piston cylinder and the inner ring (17) of the hole sealing ring is sealed with the outer ring (18) of the piston, so that the inner cavity (12) of the piston is sealed with the inner cavity (13) of the outlet end of the piston;

the body (3) is provided with a body outlet end inner cavity (13) and a body inlet end inner cavity (19), and an extending end face (10) below the piston is matched and sealed with a body outlet end inner cavity spigot (11) after the piston (5) moves, so that the body outlet end inner cavity (13) and the body inlet end inner cavity (19) are sealed.

2. The diaphragm-free shaft sleeve spring liquid control valve of claim 1, wherein:

the cross section of the piston cylinder inner ring (4) is circular, the cross section of the piston (5) is circular, the longitudinal section of the piston is U-shaped (20), the cross sections of the piston sealing ring groove (6) and the hole sealing ring groove (9) are circular, the longitudinal section of the piston sealing ring groove is concave (21), the cross sections of the piston sealing ring (7) and the hole sealing ring (8) are circular, the longitudinal section of the piston sealing ring groove and the hole sealing ring groove are V-shaped (22), and the cross section of the body outlet end inner cavity spigot (11) is circular.

3. The diaphragm-free shaft sleeve spring liquid control valve of claim 1, wherein:

the inner diameter of the body outlet end inner cavity spigot (11) is smaller than the outer diameter of the piston (5), the ring planes of the piston seal ring groove (6) and the hole seal ring groove (9) are parallel to the ring plane space of the body outlet end inner cavity spigot (11), the center line positions are the same, the piston (5) is arranged in the piston cylinder inner ring (4) and the hole seal ring (8), the ring plane center positions of the piston cylinder inner ring (4) and the hole seal ring groove (9) are the same as the center line positions of the upper part and the lower part of the piston (5), the outer ring (16) of the piston seal ring is in contact with the piston cylinder inner ring (4) and the inner ring (17) of the hole seal ring is in contact with the piston outer ring (18), the piston inner diameter opening (23) of the piston (5) faces towards the inner cavity (12) of the piston or faces towards the opposite direction of the inner cavity (12) of the piston, and the piston (5) and the extending end face (10) below the piston are vertically connected and fixed into a whole; a sealing surface (24) is arranged on an extending end surface (10) below the piston, an inner ring (14) of the piston sealing ring and a piston sealing ring groove (6) as well as an outer ring (15) of the hole sealing ring and a hole sealing ring groove (9) are in contact sealing with elastic maintenance, and an outer ring (16) of the piston sealing ring and a piston cylinder inner ring (4) as well as an inner ring (17) of the hole sealing ring and a piston outer ring (18) are in static contact sealing and sliding contact sealing with elastic maintenance; the piston sealing ring (7) and the hole sealing ring (8) have elastic retention, once the direction of the expansion opening (25) is pressed by liquid, the piston sealing ring (7) and the hole sealing ring (8) expand and stretch along with the increase and decrease of the hydraulic pressure, and if the expansion opening (25) is pressed by the hydraulic pressure in the opposite direction, the piston sealing ring (7) and the hole sealing ring (8) cannot expand and stretch along with the increase and decrease of the hydraulic pressure; the direction of the expansion opening (25) of the piston sealing ring (7) and the hole sealing ring (8) faces towards the inner cavity (12) of the piston or the direction opposite to the inner cavity (12) of the piston, and the cover (1) and the body (3) are connected and fixed into a whole in a sealing mode.

4. The diaphragm-free shaft sleeve spring liquid control valve of claim 1, wherein:

the piston sealing ring sealing structure is characterized in that the hole sealing ring grooves (9) are formed in the piston (5), the number of the piston sealing ring grooves (6) and the number of the hole sealing ring grooves (9) are more than 1, the number of the piston sealing rings (7) and the number of the hole sealing rings (8) are the same as that of the piston sealing ring grooves (6) and the number of the hole sealing ring grooves (9), the number of the hole sealing rings is matched with that of the hole sealing ring grooves (9), the number of the hole sealing rings is the same as that of the hole sealing ring grooves (6), the number of the hole sealing ring grooves (9), the number of the hole sealing rings is matched with that of the hole sealing ring grooves (9), the cover (1) and the body (3) or the cover (1), the seat (2) and the body (3) are fixedly connected into a whole through screws (26), and sealing is sealed through the sealing strips (27).

5. The diaphragm-free shaft sleeve spring liquid control valve of claim 1, wherein:

the cover (1) is provided with a shaft rod (28) extending into the inner cavity (12) of the piston, and the contact part of the shaft rod (28) and the cover (1) is sealed.

6. The diaphragm-free shaft sleeve spring liquid control valve of claim 5, wherein:

the inner cavity (12) of the piston is connected with the inner cavity (19) of the body inlet end, and the inner cavity (12) of the piston is connected with the inner cavity (13) of the body outlet end through pipelines with valves or directly connected through pipelines.

7. The diaphragm-free shaft sleeve spring liquid control valve of claim 6, wherein:

an electric actuator (54) is installed on the valve, and the electric actuator (54) executes valve opening and closing.

8. The diaphragm-free shaft sleeve spring liquid control valve of any one of claims 1-7, wherein:

the inner cavity (12) of the piston is connected with a three-way valve (33) through a pipeline (30), one outlet of the three-way valve (33) is connected into the inner cavity (19) through the pipeline (30), and the other outlet is connected into the inner cavity (13) through the pipeline (30);

or

The inner cavity (12) of the piston is connected with a three-way valve (33) through a pipeline (30), one outlet of the three-way valve (33) is connected with the inlet end inner cavity (19) through the pipeline (30) and a check valve (34), and the other outlet is connected with the outlet end inner cavity (13) through the pipeline (30).

9. The diaphragm-free shaft sleeve spring liquid control valve of any one of claims 1-7, wherein:

the inner cavity (12) of the piston is connected with the inlet end inner cavity (19) through a pipeline (30) and an inlet end two-way valve (35), and the inner cavity (12) of the piston is connected with the outlet end inner cavity (13) through a pipeline (30) and an outlet end two-way valve (36);

or

The inner cavity (12) of the piston is connected with the inlet end inner cavity (19) through a pipeline (30), an inlet end two-way valve (35) and a half-closing check valve (37), and the inner cavity (12) of the piston is connected with the outlet end inner cavity (13) through a pipeline (30), an outlet end two-way valve (36) and a half-closing check valve (37).

10. The diaphragm-free shaft sleeve spring liquid control valve of any one of claims 1-7, wherein:

the inner cavity (12) of the piston is connected with a tee joint I (39) through a two-way valve I (38), two outlets of the tee joint I (39) are respectively provided with a check valve (34), the outlet of one check valve (34) is connected into the inner cavity (19) through a pipeline (30) and the inlet of the other check valve (34) is connected into the inner cavity (13) through a pipeline (30);

the inner cavity (12) of the piston is connected with a tee joint II (41) through a two-way valve II (40), two outlets of the tee joint II (41) are respectively provided with a check valve (34), the outlet of one check valve (34) is connected with the inner cavity (19) of the inlet end of the valve body through a pipeline (30), and the outlet of one check valve (34) is connected with the inner cavity (13) of the outlet end of the connector through a pipeline (30).

11. The diaphragm-free shaft sleeve spring liquid control valve of any one of claims 1-7, wherein:

the inner cavity (12) of the piston is connected with the inlet end inner cavity (19) through a pipeline (30) and an inlet end two-way valve (35), the inner cavity (12) of the piston is connected with a ball float valve (42) through an outlet end two-way valve (36) and the pipeline (30), and a flange (43) of the body outlet end inner cavity is connected with a pipeline (44) to a liquid pool (45).

12. The diaphragm-free shaft sleeve spring liquid control valve of any one of claims 1-7, wherein:

the utility model discloses a hydraulic pump, including hand wheel tee bend pilot valve (47), hand wheel tee bend inner chamber (12), the export of hand wheel tee bend pilot valve (46) is connected through check valve (34), pipeline (30) in inner chamber (12) of piston, another export of hand wheel tee bend pilot valve (46) is through liquid inlet end (48) of pipeline (30) connection pump (47), the entry of hand wheel tee bend pilot valve (46) is through pipeline (30), inlet end two way valve (35) connector inlet end inner chamber (19), there is a hand wheel (49) on hand wheel tee bend pilot valve (46), inner chamber (12) of piston are through pipeline (30), outlet end two way valve (36) connector outlet end inner chamber (13).

13. The diaphragm-free shaft sleeve spring liquid control valve of any one of claims 1-7, wherein:

the inner cavity (12) of the piston is connected with an inlet of a two-way valve (50) through a pipeline (30), an outlet of the two-way valve (50) is connected with an outlet inner cavity (13) through an outlet two-way valve (36) and a pipeline (30), the inner cavity (12) of the piston is connected with an inlet inner cavity (19) through a pipeline (30) and an inlet two-way valve (35), and the top of the two-way valve (50) is provided with a screw rod (51).

14. The diaphragm-free shaft sleeve spring liquid control valve of any one of claims 1-7, wherein:

the inner cavity (12) of the piston is connected with one outlet of the three-way pilot valve (52) through a pipeline (30), the other outlet of the three-way pilot valve (52) is connected with the outlet inner cavity (13) through an outlet two-way valve (36) and a pipeline (30), the body inlet inner cavity (19) is connected with the inlet of the three-way pilot valve (52) through an inlet two-way valve (35) and the pipeline (30), the inner cavity (12) of the piston is connected with the outlet inner cavity (13) through a two-way valve III (53) and the pipeline (30), and the top of the three-way pilot valve (52) is provided with a screw rod (51).