CN215891162U

CN215891162U - Z-shaped liquid control valve

Info

Publication number: CN215891162U
Application number: CN202023037584.XU
Authority: CN
Inventors: 张磊
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-12-16
Filing date: 2020-12-16
Publication date: 2022-02-22
Anticipated expiration: 2030-12-16

Abstract

The utility model discloses a Z-shaped liquid control valve. The Z-shaped liquid control valve comprises a cover, a body, a sealing ring groove, a sealing ring, a piston, an end face extending below the piston and a spigot of an inner cavity at the outlet end of the body; the sealing ring groove is arranged on the cover, or on the body, or on the cover and the body simultaneously, or on a seat between the cover and the body simultaneously, or on the cover and the seat simultaneously, or on the seat and the body simultaneously, or on the cover, the seat and the body simultaneously; the sealing ring is arranged in the sealing ring groove, the piston is arranged in the sealing ring, the cover and the body or the cover, the seat and the body are sealed into a whole, and the piston and the extending end face below the piston form a whole. The utility model 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

Z-shaped liquid control valve

Technical Field

The utility model relates to a Z-shaped liquid control valve, in particular to a liquid control valve which can meet the requirements of various liquid flowing working conditions and can be formed by different processing structures and the 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, the diaphragm can be replaced by professional technicians, particularly, the diaphragm of the large-caliber valve is more difficult to replace, and the diaphragm for manufacturing the large-caliber liquid control valve and the processing cost are quite high.

The existing liquid control valve can effectively close and open the valve only by installing the shaft lever and the shaft sleeve to guide and push the interception pressing plate connected with the shaft lever, and the shaft lever and the shaft sleeve are needed, so that scaling phenomenon is easily generated in a lot of liquid, and the valve is easily closed or opened to fail.

The existing liquid control valve only controls the valve in a one-way mode in the flowing direction of liquid during operation, so that 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.

SUMMERY OF THE UTILITY MODEL

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

The Z-shaped liquid control valve comprises a cover, a body, a sealing ring groove, a sealing ring, a piston, an end face extending below the piston and a spigot of an inner cavity at the outlet end of the body. The sealing ring groove is arranged on the cover, the sealing ring is arranged on the cover and the body, the piston is arranged in the sealing ring, a whole body is arranged between the piston and the piston below extension end face, the whole body is arranged between the cover and the body, the piston inner cavity and the body outlet end inner cavity are sealed, the outer ring of the sealing ring is sealed with the sealing ring groove, the inner ring of the sealing ring is sealed with the piston outer ring in a sliding manner, the body inlet end inner cavity is sealed with the body outlet end inner cavity, and the piston below extension end face is matched and sealed with the body outlet end inner cavity spigot after the piston moves. 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 are connected, and guide valves are connected. The Z-shaped liquid control valve has the advantages that the piston inner cavity is connected with the body inlet end inner cavity and the body outlet end inner cavity through the pipelines, the valves are connected, and the pilot valve is connected to form the Z-shaped liquid control valve meeting different working condition requirements.

The piston is characterized in that a sealing surface I is arranged on the extending end face below the piston, the sealing between the outer ring of the sealing ring and the groove of the sealing ring means that the outer ring of the sealing ring is elastically kept to be in contact sealing with the groove of the sealing ring, the static sealing between the inner ring of the sealing ring and the outer ring of the piston and the sliding sealing means that the inner ring of the sealing ring is elastically kept to be in contact static sealing with the outer ring of the piston and sliding sealing with the outer ring of the piston, the outer ring of the sealing ring and the inner ring of the sealing ring have elastic keeping, once the expansion opening of the sealing ring is pressed by liquid, the sealing ring can expand and contract along with the increase and decrease of the liquid pressure, if the expansion opening of the sealing ring is pressed by the liquid pressure in the opposite direction, the sealing ring can not expand and contract along with the increase and decrease of the liquid pressure, the sealing ring is arranged in the groove of the sealing ring, the expansion opening of the sealing ring faces towards the inner cavity of the piston or faces the opposite direction of the inner cavity of the piston, and the cover, the body or the cover, The seat and the body are connected and fixed into a whole in a sealing way, and 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 with a valve or directly connected through a pipeline, the valve is connected, and the pilot valve is connected.

In some embodiments of the utility model, the plane of the sealing ring groove is circular, the structural shape of the cross section is concave, the plane of the sealing ring is circular, the shape of the cross section is V-shaped, the plane of the piston is circular, the shape of the cross section is U-shaped, the plane of the outlet end inner cavity spigot is circular, the inner diameter of the outlet end inner cavity spigot is smaller than the outer diameter of the piston, the ring plane of the sealing ring groove is parallel to the ring plane of the body outlet end inner cavity spigot in interval and the center line position is the same as and vertical to the center line position of the piston arranged in the sealing ring, the outer ring of the piston arranged in the sealing ring is required to be contacted with the inner ring of the sealing ring, the direction of the piston inner diameter opening of the piston arranged in the sealing ring faces the inner cavity of the piston or the opposite direction of the inner cavity of the piston, and the piston is vertically connected and fixed with the extending end face below the piston to form a whole, the lower extension end face is provided with a sealing face, the outer ring of the sealing ring and the sealing ring groove are sealed, the outer ring of the sealing ring is elastically kept to be in contact sealing with the sealing ring groove, the inner ring of the sealing ring and the outer ring of the piston are sealed and slidably sealed, the inner ring of the sealing ring is elastically kept to be in contact sealing with the outer ring of the piston and slidably sealed, once the expansion opening of the sealing ring is pressed by liquid, the sealing ring expands and contracts along with the increase and decrease of the hydraulic pressure, if the expansion opening of the sealing ring is pressed by the liquid in the opposite direction, the sealing ring cannot expand and contract along with the increase and decrease of the hydraulic pressure, the sealing ring is arranged in the sealing ring groove, the expansion opening of the sealing ring faces towards the inner cavity of the piston or in the opposite direction of the inner cavity of the piston, and the cover and the body are fixedly connected into a whole in a sealing way, 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 are connected, and guide valves are connected. The Z-shaped liquid control valve has the advantages that the piston inner cavity is connected with the body inlet end inner cavity and the body outlet end inner cavity through the pipelines, the valves are connected, and the pilot valve is connected to form the Z-shaped liquid control valve meeting different working condition requirements.

Sealing ring groove processing structure and sealing ring assembly structure description:

the following 14 types of seal ring groove processing structures and seal ring assembling structures are provided, but the types of the seal ring groove processing structures and the seal ring assembling structures can be changed according to needs in the manufacturing and installation processes of the valve, but the scope of the utility model is beyond the range of the type change of the seal ring groove processing structures and the seal ring assembling structures of the utility model when the basic structure principle of the utility model is followed.

In some embodiments of the utility model, the sealing ring grooves are processed on the cover, the body and the cover, the processing mode is one of three, the number of the processing sealing ring grooves is 1 or more than 1, the number of the installed sealing rings is the same as that of the processed sealing ring grooves, the types of the installed sealing rings are matched, the cover and the body are fixedly connected into a whole by screws, and the sealing is sealed by sealing strips. The sealing ring groove can also be simultaneously arranged and processed on the cover and the body, or arranged and processed on the seat between the cover and the body, or simultaneously arranged and processed on the cover and the seat, or simultaneously arranged and processed on the seat and the body, or simultaneously arranged and processed on the cover, the seat and the body, or simultaneously arranged on the cover and the body, and the seat between the cover and the body is not arranged. And selecting one from eight processing forms.

In some embodiments of the utility model, a seat is additionally arranged between the cover and the body, the sealing ring grooves are processed on the seat, the cover and the seat, the seat and the body, the cover, the seat and the body, one of five processing modes is selected, the number of the processed sealing ring grooves is 1 or more than 1, the number of the installed sealing rings is the same as that of the processed sealing ring grooves, the types of the installed sealing rings are matched, the cover, the seat and the body are fixedly connected into a whole by screws, and the sealing is sealed by sealing strips.

In some embodiments of the utility model, the sealing ring groove is processed on the I-shaped sealing ring groove seat, the number of the processed sealing ring grooves is 1 or more than 1, the number of the installed sealing rings is the same as that of the processed sealing ring grooves, the types of the installed sealing rings are matched, the I-shaped sealing ring groove seat and the body are fixedly connected into a whole by screws in a sealing way, the sealing is sealed by sealing strips, the cover and the body are fixedly connected into a whole by screws in a sealing way, and the sealing is sealed by sealing strips.

In some embodiments of the utility model, a II-type sealing ring groove seat is additionally arranged between the cover and the body, the sealing ring groove is processed on the II-type sealing ring groove seat, the number of the processed sealing ring grooves is 1 or more than 1, the number of the installed sealing rings is the same as that of the processed sealing ring grooves, the types of the installed sealing rings are matched, the cover, the II-type sealing ring groove seat and the body are fixedly connected into a whole by screws, and the sealing is sealed by sealing strips.

In some embodiments of the present invention, 1 cut-off opening is arranged above or below the sealing ring groove, a ring plane of the cut-off opening is parallel to a ring plane of the sealing ring groove, a center line position is the same, an upper outward extending part of the piston or a lower end surface of the piston is inosculated and sealed with the cut-off opening after the piston moves downwards, meanwhile, a lower extending end surface of the piston is inosculated and sealed with a body outlet end inner cavity cut-off opening, an upper outward extending part of the piston is provided with a sealing surface ii, a lower end surface of the piston is provided with a sealing surface iii, the cover and the body are fixedly connected into a whole by screws, and the sealing is sealed by a sealing strip.

In some embodiments of the present invention, a seat is added between the cover and the body, the seat is provided with a cut-off opening, the ring plane of the cut-off opening is parallel to the ring plane of the sealing ring groove, the center line position is the same, the upper outward extension part of the piston or the lower end surface of the piston is inosculated and sealed with the cut-off opening after the piston moves downwards, meanwhile, the lower extension end surface of the piston is inosculated and sealed with the inner cavity cut-off opening of the body outlet end, the upper outward extension part of the piston is provided with a sealing surface II, the lower end surface of the piston is provided with a sealing surface III, the cover, the seat and the body are fixedly connected into a whole by screws, and the sealing is sealed by sealing strips.

In some embodiments of the utility model, a shaft is mounted on the cover and extends into the inner cavity of the piston, the contact part of the shaft and the cover is sealed, and the shaft can move up and down by rotating the hand wheel.

In some embodiments of the utility model, the valve is equipped with an electric actuator, and the manual opening and closing of the valve is replaced by the electric actuator.

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 and valves, and the connection form of the pilot valve is described as 1:

the piston inner cavity is connected with the body inlet end inner cavity and the body outlet end inner cavity through pipelines, the valve is connected, and the pilot valve is connected to form a Z-shaped liquid control valve which can meet different working condition requirements. The utility model has following 9 connection forms of pipe connection, valve connection and pilot valve connection, but the utility model is not limited to the 9 connection forms of pipe connection, valve connection and pilot valve connection, and the connection forms of pipe connection, valve connection and pilot valve connection which are correspondingly changed can be used for connecting the pipe, the valve and the pilot valve connection according to the requirement of working conditions and meeting the requirement of the required working conditions.

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 and valves, and the connection form of the pilot valve is described as 2:

the manufacturing structure of the utility model can use the pipeline connection, valve connection and pilot valve connection of the utility model to form a Z-shaped liquid control valve meeting the requirements of different working conditions; the utility model also provides a manufacturing structure which is used for correspondingly changing the connection mode of the piston inner cavity, the body inlet end inner cavity and the body outlet end inner cavity according to the working condition requirement, wherein the connection mode comprises the connection of the piston inner cavity, the body inlet end inner cavity and the body outlet end inner cavity through pipelines, the connection of a valve, and the connection of a pilot valve, which can meet the required working condition requirement.

In some embodiments of the utility model, the inner cavity of the piston is connected with a three-way valve through a pipeline I, one outlet of the three-way valve is connected with the inner cavity of the body inlet end through a pipeline I and/or a check valve, and the other outlet of the three-way valve is connected with the inner cavity of the body outlet end through a pipeline I.

In some embodiments of the present invention, the piston inner cavity is connected to the body inlet end inner cavity through a pipe i and an inlet two-way valve i, and the piston inner cavity is connected to the body outlet end inner cavity through a pipe i and an outlet two-way valve ii.

In some embodiments of the present invention, the inner cavity of the piston is connected to the inner cavity of the inlet end through a pipeline i, an inlet two-way valve i, and a semi-closed check valve connector, and the inner cavity of the piston is connected to the inner cavity of the outlet end through a pipeline i, an outlet two-way valve ii, and a semi-closed check valve connector.

In some embodiments of the utility model, the inner cavity of the piston is connected with a tee joint I through a two-way valve IV, two outlets of the tee joint I are both provided with a check valve, the outlet of one check valve enters the inner cavity of the inlet end through a connector of a pipeline I, and the outlet of the other check valve enters the inner cavity of the outlet end through a connector of a pipeline I; the inner cavity of the piston is connected with a tee joint II through a two-way valve V, 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 I, and the outlet of the other check valve is connected with the inner cavity of the outlet end of the connector through a pipeline I.

In some embodiments of the utility model, the piston inner cavity is connected with the inlet end inner cavity through a pipeline I and an inlet end two-way valve I, the piston inner cavity is connected with the ball float valve through an outlet end two-way valve II and a pipeline I, and a flange of the body outlet end inner cavity is connected with the pipeline II to the liquid pool.

In some embodiments of the utility model, the piston cavity is connected with one outlet of a three-way pilot valve I through a check valve and a pipeline I, the other outlet of the three-way pilot valve I is connected with a liquid inlet end of a pump through a pipeline I, an inlet of the three-way pilot valve I is connected with the inlet cavity of the inlet end two-way valve I through a pipeline I, and the piston cavity is connected with the outlet cavity of the outlet end two-way valve II through a pipeline I.

In some embodiments of the present invention, the piston cavity is connected to an inlet of a two-way valve through a pipe i, an outlet of the two-way valve is connected to an outlet cavity of a connector of the pipe i through an outlet two-way valve ii, and the inner cavity of the piston is connected to an inlet cavity through a connector of the pipe i and an inlet two-way valve i, and a screw is arranged on the top of the two-way valve.

In some embodiments of the utility model, the inner cavity of the piston is connected with one outlet of a three-way pilot valve II through a pipeline I, the other outlet of the three-way pilot valve II is connected with the outlet of the three-way pilot valve II through an outlet two-way valve II and an outlet inner cavity of a connector of the pipeline I, the inner cavity of the body inlet is connected with the inlet of the three-way pilot valve II through an inlet two-way valve I and a pipeline I, the inner cavity of the piston is connected with the outlet inner cavity of the connector of the pipeline I through a two-way valve III, and the top of the three-way pilot valve II is provided with a screw rod.

By using the Z-shaped liquid control valve, the processing structure and the assembling method can enable the diaphragm of the Z-shaped liquid control valve to be replaced by the sealing ring, and navigation of a shaft lever and a shaft sleeve can be omitted, so that the assembling is convenient; after the Z-shaped liquid control valve is installed and used, if a sealing ring and a piston are damaged, due to the unique manufacturing and assembling method, the Z-shaped 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 Z-shaped liquid control valve can be basically the same as that of a pipeline.

The Z-shaped liquid control valve reduces the fault rate of the Z-shaped liquid control valve due to the unique design, and increases and expands the application range of the Z-shaped liquid control valve.

In the aspect of manufacturing, the Z-shaped liquid control valve has the advantages that the manufacturing is simple and the cost is reduced because the Z-shaped liquid control valve is free of the diaphragm, the shaft rod and the shaft sleeve; especially, the equipment grade required for manufacturing the large-opening Z-shaped liquid control valve can be greatly reduced, so that the Z-shaped liquid control valve with the ultra-large diameter can be manufactured.

The structure and the assembly method of the Z-shaped liquid control valve can enable the Z-shaped 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 Z-shaped liquid control valve can ensure that the Z-shaped liquid control valve does not need to be provided with a diaphragm, a shaft lever, a shaft sleeve and a 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 Z-shaped 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 Z-type liquid control valve; wherein a) an elevational view of the body, b) an enlarged partial elevational view of the cover and slot, c) a general elevational view of the piston and extended end face, d) a sealing ring and enlarged partial elevational view thereof, e) an elevational view of an embodiment of the valve.

FIG. 2 is a schematic diagram of the basic structure of a second Z-type liquid control valve; wherein a) the body and the groove are partly enlarged in cross-section, b) the cover is in cross-section, c) the piston and the extension end face are in cross-section, d) the sealing ring and its partly enlarged cross-section, e) the valve embodiment is schematically illustrated in cross-section.

FIG. 3 is a schematic diagram of the basic structure of a third Z-type liquid control valve; wherein a) the body is in front section, b) the cover is in front section, c) the piston and the extension end face are in whole in front section, d) the valve embodiment and the sealing ring and groove are partially enlarged in front section and are schematically shown in cross section.

Fig. 4 is a schematic diagram of the basic structure of a fourth Z-type liquid control valve, which is 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 Z-type liquid control valve; wherein a) an elevational cross-section of the body, b) an enlarged partial elevational cross-section of the cap and the concave groove, c) an elevational cross-section of the piston and the extended end surface as a whole and of the U-shaped piston, d) a V-shaped sealing ring and an enlarged partial elevational cross-section thereof, e) an elevational cross-section schematic of an embodiment of the valve.

FIG. 6 is a schematic diagram of the basic structure of a sixth Z-type liquid control valve; wherein a) the body and the concave groove are partly enlarged in elevation and section, b) the cover is enlarged in elevation and section, c) the piston and the extended end surface as a whole and the U-shaped piston are enlarged in elevation and section, d) the sealing ring and its partly enlarged elevation and section, e) the valve embodiment is schematically illustrated in elevation and section.

FIG. 7 is a schematic diagram of the basic structure of a seventh Z-type liquid control valve; an enlarged cross-sectional view of an embodiment of the valve and a portion of the concave groove.

FIG. 8 is a schematic diagram of the basic structure of an eighth Z-type liquid control valve; valve embodiment and sealing washer inflation mouth part enlarge cross-section schematic diagram.

FIG. 9 is a schematic view of a seal ring groove machining structure and a seal ring assembly structure of a ninth Z-shaped fluid control valve; wherein a) an elevational cross-section of the body, b) an elevational cross-section of the cap, c) an elevational cross-section of the piston and extended end face ensemble and U-shaped piston, d) a seal ring and a partially enlarged elevational cross-section thereof, e) an elevational cross-section of an embodiment of the valve and a partially enlarged view of the concave groove.

FIG. 10 is a schematic view of a seal ring groove machining structure and a seal ring assembling structure of a tenth Z-shaped liquid control valve; wherein a) an elevational cross-section of the body, b) an elevational cross-section of the cap, c) an elevational cross-section of the piston and extended end face ensemble and U-shaped piston, d) a seal ring and a partially enlarged elevational cross-section thereof, e) an elevational cross-section of an embodiment of the valve and a partially enlarged view of the concave groove.

FIG. 11 is a seal ring groove machining structure and a seal ring assembling structure of an eleventh Z-shaped liquid control valve; wherein a) an elevational cross-section of the body, b) an elevational cross-section of the cap, c) an elevational cross-section of the piston and extended end face ensemble and U-shaped piston, d) a seal ring and a partially enlarged elevational cross-section thereof, e) an elevational cross-section of an embodiment of the valve and a partially enlarged view of the concave groove.

FIG. 12 is a schematic view of a seal ring groove machining structure and a seal ring assembling structure of a twelfth type of Z-shaped liquid control valve; a) an elevational cross-section of the body, b) an elevational cross-section of the cover, c) an elevational cross-section of the piston and extended end face ensemble and the U-shaped piston, d) an elevational cross-section of the seat, e) a sealing ring and a partially enlarged elevational cross-section thereof, f) an elevational cross-section of the valve embodiment and a partially enlarged view of the concave groove.

FIG. 13 is a schematic view of a gasket groove machining structure and a gasket mounting structure of a thirteenth type Z-shaped fluid control valve; a) an elevational cross-section of the body, b) an elevational cross-section of the cover, c) an elevational cross-section of the piston and extended end face ensemble and the U-shaped piston, d) an elevational cross-section of the seat, e) a sealing ring and a partially enlarged elevational cross-section thereof, f) an elevational cross-section of the valve embodiment and a partially enlarged view of the concave groove.

FIG. 14 is a schematic view of a seal ring groove machining structure and a seal ring assembly structure of a fourteenth Z-shaped fluid control valve; a) an elevational cross-section of the body, b) an elevational cross-section of the cover, c) an elevational cross-section of the piston and extended end face ensemble and the U-shaped piston, d) an elevational cross-section of the seat, e) a sealing ring and a partially enlarged elevational cross-section thereof, f) an elevational cross-section of the valve embodiment and a partially enlarged view of the concave groove.

FIG. 15 is a schematic view of a seal ring groove machining structure and a seal ring assembling structure of a fifteenth type of Z-shaped liquid control valve; a) an elevational cross-section of the body, b) an elevational cross-section of the cover, c) an elevational cross-section of the piston and extended end face ensemble and the U-shaped piston, d) an elevational cross-section of the seat, e) a sealing ring and a partially enlarged elevational cross-section thereof, f) an elevational cross-section of the valve embodiment and a partially enlarged view of the concave groove.

FIG. 16 is a schematic view of a seal ring groove machining structure and a seal ring assembling structure of a sixteenth type Z fluid control valve; a) an elevational cross-section of the body, b) an elevational cross-section of the cover, c) an elevational cross-section of the piston and extended end face ensemble and the U-shaped piston, d) an elevational cross-section of the seat, e) a sealing ring and a partially enlarged elevational cross-section thereof, f) an elevational cross-section of the valve embodiment and a partially enlarged view of the concave groove.

FIG. 17 is a schematic view of a seal ring groove machining structure and a seal ring assembling structure of a seventeenth Z-shaped liquid control valve; a) an elevational cross-section of the body, b) an elevational cross-section of the cover, c) an elevational cross-section of the piston and extended end face ensemble and the U-shaped piston, d) an elevational cross-section of the seat, e) a sealing ring and a partially enlarged elevational cross-section thereof, f) an elevational cross-section of the valve embodiment and a partially enlarged view of the concave groove.

FIG. 18 is a seal ring groove machining structure and a seal ring assembling structure of an eighteenth Z-shaped liquid control valve; a) an elevational cross-section of the body, b) an elevational cross-section of the cover, c) an elevational cross-section of the piston and extended end face ensemble and the U-shaped piston, d) an elevational cross-section of the seat, e) a sealing ring and a partially enlarged elevational cross-section thereof, f) an elevational cross-section of the valve embodiment and a partially enlarged view of the concave groove.

FIG. 19 is a schematic view of a basic double-stop valve structure of a Z-type liquid control valve; a) an elevational cross-section of the body, b) an elevational cross-section of the cap, c) an elevational cross-section of the piston and extended end face ensemble and U-shaped piston, d) a seal ring and its partially enlarged elevational cross-section, e) an elevational cross-section of the valve embodiment and a partially enlarged view of the concave groove, seal ring, and upper stop.

FIG. 20 is a schematic view of a double-stop valve in basic configuration for a Z-type fluid control valve; a) an elevational cross-section of the body, b) an elevational cross-section of the cap, c) an elevational cross-section of the piston and extended end face ensemble and U-shaped piston, d) a seal ring and its partially enlarged elevational cross-section, e) an elevational cross-section of the valve embodiment and a partially enlarged view of the concave groove, seal ring, and upper stop.

FIG. 21 is a schematic view of a double-stop valve configuration of an alternative Z-type fluid control valve basic configuration; a) an elevational cross-section of the body, b) an elevational cross-section of the cap, c) an elevational cross-section of the piston and extended end face ensemble and U-shaped piston, d) an elevational cross-section of the seat, e) a sealing ring and its partially enlarged elevational cross-section, f) an elevational cross-section of the valve embodiment and a partially enlarged view of the concave groove, sealing ring, upper stop.

FIG. 22 is a schematic view of a dual-stop valve of another basic Z-type configuration; a) an elevational cross-section of the body, b) an elevational cross-section of the cap, c) an elevational cross-section of the piston and extended end face ensemble and U-shaped piston, d) an elevational cross-section of the seat, e) a sealing ring and its partially enlarged elevational cross-section, f) an elevational cross-section of the valve embodiment and a partially enlarged view of the concave groove, sealing ring, upper stop.

FIG. 23 is a schematic diagram of a basic construction of a Z-type fluid control valve for a constrictor valve;

FIG. 24 is a schematic diagram of an alternative construction of a constrictor valve for the basic Z-shaped liquid control valve;

FIG. 25 is a schematic diagram of a basic construction of an electric valve for a Z-type liquid control valve;

FIG. 26 is a schematic diagram of an alternative Z-type liquid control valve basic configuration for an electrically operated valve;

FIG. 27 is a schematic view of a one-way single shut-off valve for a Z-type fluid control valve;

FIG. 28 is a schematic diagram of a one-way double shut-off valve for a Z-type liquid control valve;

FIG. 29 is a schematic view of a check valve and shut-off valve of a Z-type fluid control valve;

FIG. 30 is a schematic diagram of a two-way single shut-off valve for a Z-type fluid control valve;

FIG. 31 is a schematic diagram of a two-way double shut-off valve for a Z-type liquid control valve;

FIG. 32 is a schematic view of a float valve of a Z-type liquid control valve;

FIG. 33 is a schematic view of a Z-shaped fluid control valve restrictor and check valve;

FIG. 34 is a schematic diagram of a pressure reducing and stabilizing valve of a Z-type liquid control valve;

FIG. 35 is a schematic diagram of a Z-type fluid control valve relief valve.

Description of the drawings:

the sealing structure comprises a cover 1, a seat 2, a body 3, a sealing ring groove 4, a sealing ring 5, a piston 6, a piston inner cavity 7, a body outlet end inner cavity 8, an outer ring 9 of the sealing ring, an inner ring 10 of the sealing ring, a piston outer ring 11, a body inlet end inner cavity 12, a piston lower extension end face 13, a body outlet end inner cavity spigot 14, a pipeline I15, a valve I16, a three-way valve 17, a check valve 18, an inlet two-way valve I19, an outlet two-way valve II 20, a three-way valve I21, a three-way valve II 22, a floating ball valve 23, a flange 24 of the body outlet end inner cavity, a pipeline II 25, a liquid pool 26, a three-way pilot valve I27, a liquid inlet end 28, a hand wheel 29, a two-way pilot valve 30, a screw 31, a three-way pilot valve II32, a two-way valve III 33, a semi-closing check valve 34, a pump 35, a two-way valve IV 36, a two-way valve V37, a sealing face I38, a screw 39, a stop 40, an upper outward extension part 41, a lower end face 42, a lower end face 43, a lower end face 42, a lower end face and a sealing face, The valve comprises a shaft rod 44, a rotating hand wheel 45, a T-shaped sealing ring groove seat 46, a II-shaped sealing ring groove seat 47, a sealing ring expansion opening 48, a concave shape 49, a V-shaped shape 50, a piston inner diameter opening 51, a sealing strip 52, a sealing surface II 53, a sealing surface III 54, a screw 55, a U-shaped shape 56 and a valve II 57.

Detailed Description

The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. For convenience of description, the words "upper", "lower", "left" and "right" in the following description are used only to indicate the correspondence between the upper, lower, left and right directions of the drawings themselves, and do not limit the structure.

Example 1

As shown in fig. 1, 2, 3 and 4, the Z-shaped liquid control valve of the utility model comprises a cover 1, a body 3, a sealing ring groove 4, a sealing ring 5, a piston 6, a piston lower extending end surface 13 and a body outlet end inner cavity spigot 14. The sealing ring groove 4 is arranged on the cover 1, the body 3 and the

covers

1 and 3, the sealing ring 5 is arranged in the sealing ring groove 4, the piston 6 is arranged in the sealing ring 5, a whole body is arranged between the piston 6 and the piston lower extending end surface 13, the cover 1 and the body 3 are sealed into a whole body, the piston inner cavity 7 and the body outlet end inner cavity 8 are sealed, the outer ring 9 of the sealing ring is sealed with the sealing ring groove 4, the inner ring 10 of the sealing ring is sealed with the piston outer ring 11 in a sliding manner, the body inlet end inner cavity 12 and the body outlet end inner cavity 8 are sealed, and the piston lower extending end surface 13 is matched with the body outlet end inner cavity spigot 14 after the piston 6 moves for sealing. The piston inner cavity 7 is connected with the body inlet end inner cavity 12 and the body outlet end inner cavity 8 through a pipeline, a valve or a pilot valve.

Example 2

In the above Z-shaped liquid control valve, as shown in fig. 5, 6, 7, and 8, the plane of the sealing ring groove 4 is circular, the cross-sectional structural shape is concave 49, the plane of the sealing ring 5 is circular, the cross-sectional shape is V-shaped 50, the plane of the piston 6 is circular, the cross-sectional shape is U-shaped 56, the plane of the outlet end inner cavity spigot 14 is circular, the inner diameter of the outlet end inner cavity spigot 14 is smaller than the outer diameter of the piston 6, the ring plane of the sealing ring groove 4 is parallel to the ring plane of the body outlet end inner cavity spigot 14 at a distance and at a same center line position, the center line position of the ring plane of the sealing ring groove 4 is the same as and perpendicular to the center line position of the piston 6 disposed in the sealing ring 5, the piston 6 is disposed in the sealing ring 5, the outer ring 11 of the piston needs to contact with the inner ring 10 of the sealing ring, and the piston inner diameter 51 of the piston (6) disposed in the sealing ring 5 is oriented toward the piston inner cavity 7 or oriented toward the piston inner cavity 7 In the opposite direction, the piston 6 and the piston lower extension end surface 13 are vertically connected and fixed into a whole, the lower extension end surface 13 is provided with a sealing surface I38, the outer ring 9 of the sealing ring and the sealing ring groove 4 are sealed, the outer ring 9 of the sealing ring has elastic holding to be in contact with the sealing ring groove 4, the inner ring 10 of the sealing ring and the piston outer ring 11 are sealed and slide-sealed, the inner ring 10 of the sealing ring and the piston outer ring 11 have elastic holding, once the sealing ring expansion opening 48 is pressed by liquid, the sealing ring 4 expands and contracts along with the increase and decrease of the liquid pressure, if the sealing ring expansion opening 48 is pressed by the liquid in the opposite direction, the sealing ring 4 does not expand and contract along with the increase and decrease of the liquid pressure, the sealing ring 5 is arranged in the sealing ring groove 4, the direction of the expansion opening 48 of the sealing ring faces towards the inner cavity 7 of the piston or the direction opposite to the inner cavity 7 of the piston, and the cover 1 and the body 3 are connected and fixed into a whole in a sealing way. The piston cavity 7 is connected with the body inlet end cavity 12 and the body outlet end cavity 8 through pipelines, valves and pilot valves.

The specific description is as follows: the structure of the Z-shaped liquid control valve can ensure that the Z-shaped liquid control valve does not need to be provided with a diaphragm, a shaft lever, a shaft sleeve and a spring; liquid can pass through the Z-shaped liquid control valve in two directions; the Z-shaped liquid control valve can close the liquid passing through in two directions.

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

1. The piston inner cavity 7, the body inlet end inner cavity 12 and the body outlet end inner cavity 8 are connected through a pipeline I15, a valve I16 and a valve II 57, when liquid flows from the body inlet end inner cavity 12 to the body outlet end inner cavity 8, the valve I16 on the side of the body inlet end inner cavity 12 is closed, the valve II 57 on the side of the body outlet end inner cavity 8 is opened, the liquid in the body inlet end inner cavity 12 cannot enter the piston inner cavity 7, the extending end face 13 below the piston leaves the body outlet end inner cavity spigot 14 under the pushing of the liquid in the body inlet end inner cavity 12, the liquid in the body inlet end inner cavity 12 enters the body outlet end inner cavity 8 through the body outlet end inner cavity spigot 14, the piston inner cavity 7 is communicated with the body outlet end inner cavity 8, the liquid pressure in the piston inner cavity 7 and the body outlet end inner cavity 8 is the same, and the liquid in the body inlet end inner cavity 12 can enter the body outlet end inner cavity 8 through the body outlet end inner cavity spigot 14 only depending on the integral weight of the piston 6 vertically and fixedly connected with the extending end face 13 below the piston and the inner ring 10 has elasticity The resistance caused by the friction of the contact seal and the sliding contact seal with the outer ring 11 of the piston is kept, because the inner ring 10 of the sealing ring 5 has the elasticity of elastically keeping the contact seal with the outer ring 11 of the piston when the sealing ring is not pressed by liquid, the resistance caused by the friction is small, the liquid in the inner cavity 12 of the body inlet end can overcome the integral weight of the vertical fixed connection between the piston 6 and the extending end surface 13 below the piston and the pressure loss of the resistance caused by the friction of the elastic keeping of the inner ring 10 of the sealing ring and the contact seal and the sliding contact seal with the outer ring 11 of the piston, and the liquid in the inner cavity 12 of the body inlet end can flow into the inner cavity 8 of the body outlet end, therefore, the pressure loss of the liquid flowing through the body outlet end inner cavity spigot 14 and entering the body outlet end inner cavity 8 is small, the starting pressure of the Z-shaped liquid control valve is extremely small, and the use working condition range of the Z-shaped liquid control valve is large.

2. The piston inner cavity 7, the body inlet end inner cavity 12 and the body outlet end inner cavity 8 are connected through a pipeline I15, a valve I16 and a valve II 57, when liquid flows to the body outlet end inner cavity 8 from the body inlet end inner cavity 12, the valve I16 on the side of the body inlet end inner cavity 12 is opened, the valve II 57 on the side of the body outlet end inner cavity 8 is closed, the liquid in the body inlet end inner cavity 12 enters the piston inner cavity 7, the piston inner cavity 7 is not communicated with the body outlet end inner cavity 8, the liquid pressure in the piston inner cavity 7 and the liquid pressure in the valve body inlet end inner cavity 12 are the same, the liquid pressure in the body outlet end inner cavity 8 can enter the body outlet end inner cavity 8 by overcoming the resistance brought by the fact that the liquid pressure in the body inlet end inner cavity 12 overcomes the integral weight of the piston 6 and the piston lower extension end face 13 which are vertically and the inner ring 10 of the sealing ring has elastic force to keep the sliding contact and the sealing with the piston outer ring 11, and therefore the liquid pressure in the body inlet end inner cavity 12 and the body outlet end inner cavity 8 have a minimum value Because the inner ring 10 of the sealing ring has the elasticity which elastically keeps the contact sealing with the outer ring 11 of the piston to be extremely small, the friction of the sliding contact sealing of the outer ring 11 of the piston is small, the outer ring 11 of the sealing ring and the inner ring 10 of the sealing ring have the elasticity which keeps the contact sealing with the outer ring 11 of the piston to be elastically kept, liquid can not leak into the inner cavity 8 of the outlet end of the body, because the area of the outer ring of the piston 6 is larger than the area of the inner ring of the spigot 14 of the inner cavity of the outlet end of the body, the piston 6 moves downwards after being pressed, the distance between the extension end surface 13 below the piston and the spigot 14 of the inner cavity of the outlet end of the body is gradually close when the piston 6 moves downwards, the liquid pressure difference between the inner cavity 12 of the inlet end of the body and the spigot 8 of the outlet end of the body is gradually increased, and in the process of the gradually increasing of the liquid pressure, the sealing ring 5 expands along with the increase of the liquid pressure under the pressure applied to the direction of the expansion port 48 of the liquid, at the moment, the sealing ring 5 tends to the expansion state in the groove 4 of the sealing ring, after the sealing ring 5 expands, a ring-shaped force is formed between the sealing ring groove 4 and the sealing ring 5, so that the piston 6 is perpendicular to the plane circle of the sealing ring groove 4, and the extending end surface 13 below the piston and the spigot 14 of the inner cavity of the outlet end of the body are kept in parallel at a distance; the piston 6 continues to move downwards, and the friction resistance between the sliding contact seal of the inner ring 10 of the sealing ring and the outer ring 11 of the piston is increased due to the expansion of the sealing ring 5, so that the piston 6 cannot shake when the distance between the piston below extension end face 13 and the body outlet end inner cavity spigot 14 is close after the piston 6 moves downwards, and the valve is in a vibration-free fit seal mode, so that the Z-shaped liquid control valve does not need to use a spring to reset and increase the stability when the valve is closed, and the diaphragm shaft lever shaft sleeve to ensure that the below extension end face 13 and the valve body outlet end inner cavity spigot 14 are in parallel fit seal.

3. The piston inner cavity 7, the body inlet end inner cavity 12 and the body outlet end inner cavity 8 are connected through a pipeline I15, a valve I16 and a valve II 57, when liquid flows to the body inlet end inner cavity 12 from the body outlet end inner cavity 8, the valve I16 on the side of the body inlet end inner cavity 12 is opened, the valve II 57 on the side of the body outlet end inner cavity 8 is closed, the liquid in the body outlet end inner cavity 8 cannot enter the piston inner cavity 7, the liquid in the piston inner cavity 7 can flow into the valve body inlet end inner cavity 12 through the pipeline I15 and the valve I16 on the side of the inlet end inner cavity 12, the liquid pressure in the piston inner cavity 7 is the same as the liquid pressure in the body inlet end inner cavity 12, and as the area of an outer ring of the piston 6 is larger than the area of an inner ring of the body outlet end inner cavity spigot 14, as long as the liquid pressure in the body outlet end inner cavity 8 is larger than the liquid pressure in the inlet end inner cavity 12, the whole weight of the piston 6 vertically and the sealing ring 10 of the sealing ring which is fixedly connected with the extending end 13 below the piston and the piston outer ring 11 can be kept in sliding contact with the piston outer ring 11 elastically The resistance brought by the friction between the seals, the piston 6 is pushed by the liquid in the inner cavity 8 of the outlet end of the body to move upwards, the extending end surface 13 below the piston leaves the spigot 14 of the inner cavity of the outlet end of the body when the piston 6 moves upwards, the liquid in the inner cavity 8 of the outlet end of the body flows into the inner cavity 12 of the inlet end of the body through the spigot 14 of the inner cavity of the outlet end of the body, and the valve is opened; in the opening process of the valve, the liquid pressure in the inner cavity 8 at the body outlet end and the liquid pressure difference in the inner cavity 12 at the body inlet end are closer and closer, the sealing ring 4 expands and contracts along with the reduction of the hydraulic pressure under the action of the liquid pressure, when the piston 6 moves to the whole weight of the piston 6 vertically and fixedly connected with the extending end surface 13 below the piston and the resistance caused by the friction between the elastic keeping and the sliding contact and sealing of the inner ring 10 of the sealing ring and the outer ring 11 of the piston, the piston 6 does not move upwards any more, so as long as the conveying pressure of the two liquid flow directions is the same, the opening degree of the valve is determined by the whole weight of the piston 6 vertically and fixedly connected with the extending end surface 13 below the piston and the resistance caused by the friction between the elastic keeping and the sliding contact and sealing of the outer ring 11 of the inner ring 10 of the sealing ring, therefore, the valve can realize the flow from the inner cavity 8 at the body outlet end to the inner cavity 12 at the body inlet end, and the pressure loss of the liquid flowing from the body outlet end inner cavity 8 to the body inlet end inner cavity 12 is small, so that the Z-shaped liquid control valve realizes bidirectional circulation under the condition of small pressure loss.

4. The piston inner cavity 7, the body inlet end inner cavity 12 and the body outlet end inner cavity 8 are connected through a pipeline I15, a valve I16 and a valve II 57, when liquid flows to the body inlet end inner cavity 12 from the body outlet end inner cavity 8, the valve I16 on the side of the body inlet end inner cavity 12 is closed, the valve II 57 on the side of the body outlet end inner cavity 8 is opened, the liquid in the body outlet end inner cavity 8 enters the piston inner cavity 7, the liquid in the piston inner cavity 7 cannot flow into the valve body inlet end inner cavity 12 through the pipeline I15 and the valve I16 on the side of the inlet end inner cavity 12, the liquid pressure in the piston inner cavity 7 is the same as the liquid pressure in the body outlet end inner cavity 8 at the moment, as long as the overall weight of the piston 6, which is vertically and fixedly connected with the extending end surface 13 below the piston, can overcome the resistance brought by the elastic retention of the inner ring 10 of the sealing ring and the sliding contact seal between the piston outer ring 11, the inner ring 10 of the sealing ring can be kept in contact with the piston outer ring 11 in an elastic manner when the sealing ring 5 is not pressurized by the liquid The elasticity of the seal is extremely small, the resistance caused by friction is small, the piston 6 can move downwards under the action of self weight, the extending end face 13 below the piston is matched with the body outlet end inner cavity spigot 14 after the piston 6 moves downwards to seal and cut off the liquid in the valve body outlet end inner cavity 8 from flowing to the body inlet end inner cavity 12, the valve is closed, and the Z-shaped liquid control valve can be closed in two directions.

Example 3

In the Z-shaped liquid control valve, the sealing ring grooves 4 are processed on the cover 1, the body 3 and the covers 1 and the body 3, one of three processing modes is selected, the number of the processing sealing ring grooves 4 is 1 or more than 1, the number of the installed sealing rings 5 is the same as that of the processed sealing ring grooves 4, the types of the installed sealing rings are matched, the covers 1 and the body 3 are fixedly connected into a whole by screws 39, and the sealing is sealed by sealing strips 52, as shown in fig. 9, 10 and 11.

Example 4

In the Z-shaped liquid control valve, the seat 2 is additionally arranged between the cover 1 and the body 3, the sealing ring groove 4 is processed on the seat 2, the cover 1 and the seat 2, the seat 2 and the body 3, the cover 1, the seat 2 and the body 3, the processing mode is one of five, the number of the processing sealing ring grooves 4 is 1 or more, the number of the installed sealing rings 5 is the same as that of the processed sealing ring grooves 4, the types of the installed sealing rings are matched, the cover 1, the seat 2 and the body 3 are fixedly connected into a whole by screws 39, and the sealing is sealed by sealing strips 52, as shown in fig. 12, 13, 14, 15 and 16.

Example 5

In the Z-shaped liquid control valve, the sealing ring groove 4 is processed on the i-shaped sealing ring groove seat 46, the number of the processed sealing ring grooves 4 is 1 or more than 1, the number of the installed sealing rings 5 is the same as that of the processed sealing ring grooves 4, the models of the installed sealing rings are matched, the i-shaped sealing ring groove seat 46 and the body 3 are fixedly connected into a whole by adopting the screws 55, the sealing is sealed by adopting the sealing strips 52, the cover 1 and the body 3 are fixedly connected into a whole by adopting the screws 39, and the sealing is sealed by adopting the sealing strips 52, as shown in fig. 17.

Example 6

In the above-mentioned Z type liquid control valve, increase II type sealing washer groove seat 47 between lid 1, the body 3, sealing washer groove 4 processing is on II type sealing washer groove seat 47, and the processing quantity is 1 or more than 1, and the 5 quantity of the sealing washer of installation is the same with the 4 quantity of the sealing washer groove of processing, the model matches, sealed connection adopts screw 39 fixed connection to become a whole between lid 1, II type sealing washer groove seat 47, the body 3, and sealed sealing strip 52 that adopts, as shown in fig. 18.

Example 7

In the Z-shaped liquid control valve, 1 cut-off port 40 is arranged above or below the sealing ring groove 4, the ring plane of the cut-off port 40 is parallel to the ring plane of the sealing ring groove 4, the center line position is the same, the upper outwardly extending part 41 of the piston 6 or the lower end face 42 of the piston 6 is matched and sealed with the cut-off port 40 after the piston 6 moves downwards, meanwhile, the lower extending end face 13 of the piston is matched and sealed with the body outlet end inner cavity port 14, the upper outwardly extending part 41 of the piston 6 is provided with a sealing face ii 53, the lower end face 42 of the piston 6 is provided with a sealing face iii 54, the cover 1 and the body 3 are fixedly connected into a whole by a screw 39, and the sealing is sealed by a sealing strip 52, as shown in fig. 19 and fig. 20.

Example 8

In the above Z-type liquid control valve, the seat 2 is added between the cover 1 and the body 3, the seat 2 is provided with a cut-off port 40, the ring plane of the cut-off port 40 is parallel to the ring plane of the sealing ring groove 4, the center line position is the same, the upper outwardly extending part 41 of the piston 6 or the lower end face 42 of the piston 6 fits with the cut-off port 40 for sealing after the piston 6 moves downwards, meanwhile, the lower extending end face 13 of the piston fits with the body outlet end inner cavity stop 14 for sealing, the upper outwardly extending part 41 of the piston 6 is provided with a sealing face ii 53, the lower end face 42 of the piston 6 is provided with a sealing face iii 54, the cover 1, the seat 2 and the body 3 are fixedly connected into a whole by screws 39, and the sealing is sealed by a sealing strip 52, as shown in fig. 21 and 22.

Example 9

In the Z-shaped liquid control valve, a shaft rod 44 is arranged on the cover 1 and extends into the piston inner cavity 7, the contact part of the shaft rod 44 and the cover 1 is sealed, and the shaft rod 44 can move up and down through a rotating hand wheel 45. As shown in fig. 23 and 24.

Further details of example 1, example 2, example 3, example 4, example 5, example 6, example 7, example 8 and example 9 are as follows:

detailed description 1

In the Z-shaped liquid control valve, when the sealing ring 5 is installed, the sealing ring 5 needs 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 12 of the body inlet end to the inner cavity 8 of the body outlet end, the direction of the expansion port 48 of the sealing ring is installed towards the inner cavity 7 of the piston, under the working condition, the liquid only needs to flow from the inner cavity 8 of the body outlet end to the inner cavity 12 of the body inlet end, and the direction of the expansion port 48 of the sealing ring is installed towards the opposite direction of the inner cavity 7 of the piston; the working condition requires that the liquid flows in two directions, and when the sealing ring 5 is installed, the sealing ring 5 facing the piston inner cavity 7 needs to be provided with sealing ring expansion openings 48 in two directions; the working condition only requires that the Z-shaped liquid control valve is opened and closed in one way, the number of the mounting sealing rings 5 is 1 or more than 1, if the two directions are required to be opened and closed, the number of the mounting sealing rings 5 is 2 to more than 2; through the processing structure of different sealing ring grooves 4 and the assembling form of the sealing ring 5, the requirements of various working conditions on the Z-shaped liquid control valve can be met.

Detailed description 2:

when the piston 6 and the piston lower extension end surface 13 are vertically connected and fixed into a whole, the direction of the piston inner diameter opening 51 of the piston 6 faces the piston inner cavity 7 or the direction opposite to the piston inner cavity 7 is connected and fixed, so that the requirement of the Z-shaped liquid control valve on the working condition can be met.

Description of the details 3:

in the Z-shaped liquid control valve, the sealing ring seat and the piston of the valve can be replaced in a set by adopting the structural forms shown in fig. 17 and 18, and other parts of the Z-shaped liquid control valve do not need to be replaced after the piston and the sealing ring seat are damaged. Due to the unique manufacturing and assembling method, the Z-shaped liquid control valve is extremely convenient to maintain and does not need to be replaced by professional technicians, so that the service life of the Z-shaped liquid control valve can be basically the same as that of a pipeline.

Detailed description 4:

in the Z-type liquid control valve, the sealing effect of the valve can be further improved by adopting the structural forms of fig. 19, 20, 21 and 22.

The working principle is as follows:

1. as shown in fig. 19 and 21, the liquid flows from the body inlet end inner cavity 12 to the body outlet end inner cavity 8, the outward extending part 41 of the upper end surface of the piston fits and seals with the stop port 40 after the piston 6 moves downward, and simultaneously the downward extending end surface 13 of the piston fits and seals with the body outlet end inner cavity stop port 14 to cut off the liquid flowing from the body inlet end inner cavity 12 to the body outlet end inner cavity 8, and the valve is closed; a cut-off opening 40 is processed above a sealing ring groove 4, when the lower end face 42 of the piston is matched and sealed with the cut-off opening 40 after the piston 6 moves downwards, liquid in the piston inner cavity 7 is sealed at the position, and the cut-off opening is sealed, so that the abrasion of the seal of the cut-off opening is extremely small, the seal is better along with the increase of the using time, and the liquid which does not leak can not permeate into the inner cavity 8 of the body outlet end, and the valve is completely sealed without permeation.

2. As shown in fig. 20 and 22, in the Z-shaped liquid control valve lower double-stop valve, liquid flows from the body inlet end inner cavity 12 to the body outlet end inner cavity 8, the lower end face 42 of the piston is matched and sealed with the stop port 40 after the piston 6 moves downwards, meanwhile, the lower extending end face 13 of the piston is matched and sealed with the body outlet end inner cavity stop port 14 to cut off the liquid flowing from the body inlet end inner cavity 12 to the body outlet end inner cavity 8, and the valve is closed; a cut-off port 40 is processed below a sealing ring groove 4, when the lower end face 42 of the piston is matched and sealed with the cut-off port 40 after the piston 6 moves downwards, liquid in the inner cavity 7 of the piston is sealed at the position, and the cut-off port is sealed, so that the abrasion of the seal of the cut-off port is extremely small, the seal is better along with the increase of the using time, and liquid which does not leak permeates into the inner cavity 8 of the outlet end of the body, and the valve is completely sealed without permeation.

Description of the details 5:

if the flow rate is to be statically adjusted, the structural form of fig. 23 and 24 is preferably adopted.

The working principle is as follows:

in the Z-shaped liquid control valve flow-limiting valve shown in fig. 23 and 24, the piston 6 has two installation forms, and the piston inner diameter opening 51 of the piston 6 placed in the sealing ring 5 is towards the piston inner cavity 7 or the opposite direction of the piston inner cavity 7; the shaft lever 44 can move up and down by rotating the hand wheel 45, the shaft lever 44 is moved to a set position, and the piston 6 can be propped by the shaft lever 44 after rising and can not rise any more, so that the lower extension end surface 13 of the piston and the body outlet end inner cavity spigot 14 can be kept at a set fixed opening, the flow between the lower extension end surface 13 of the piston and the body outlet end inner cavity spigot 14 is limited, and static flow limitation is realized.

Example 10

In the Z-type liquid control valve, the electric actuator 43 is attached to the valve, and the valve is opened and closed by the attached electric actuator 43, as shown in fig. 25 and 26.

The specific description is as follows:

the electric actuator 43 is used for opening and closing the valve, and the electric actuator 43 is used for replacing manual operation to open and close the valve, so that the control of the Z-shaped liquid control valve can be realized remotely: once the power is off, the actuator 43 can be removed and the valve opened and closed with conventional tools.

Example 11

In the above Z-shaped liquid control valve with single-way shutoff, the piston cavity 7 is connected to the three-way valve 17 through the pipe i 15, one outlet of the three-way valve 17 is connected to the valve body inlet cavity 12 through the pipe i 15, and the other outlet is connected to the valve body outlet cavity 8 through the pipe i 15, as shown in fig. 27.

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. 27.

The working principle is as follows:

1. when liquid flows from the body inlet end inner cavity 12 to the body outlet end inner cavity 8, the switch position of the three-way ball valve 17 is arranged between the piston inner cavity 7 and the body inlet end inner cavity 12 to be closed, the piston inner cavity 7 and the body outlet end inner cavity 8 are opened, the liquid in the body inlet end inner cavity 12 cannot enter the piston inner cavity 7 through the pipeline I15 and the three-way ball valve 17, meanwhile, the liquid in the piston inner cavity 7 can enter the body outlet end inner cavity 8 through the three-way ball valve 17 and the pipeline I15, at the moment, the piston 6 cannot be pressed, the extending end face 13 below the piston leaves the body outlet end inner cavity spigot 14 under the pushing of the liquid in the body inlet end inner cavity 12, the liquid in the body inlet end inner cavity 12 enters the body outlet end inner cavity 8 through the body outlet end inner cavity spigot 14, and the valve is opened; the switch position of a three-way ball valve 17 is arranged in a piston inner cavity 7 and a body inlet end inner cavity 12 to be opened, the piston inner cavity 7 and a body outlet end inner cavity 8 are closed, liquid in the body inlet end inner cavity 12 enters the piston inner cavity 7 through a pipeline I15 and the three-way ball valve 17, meanwhile, the liquid in the piston inner cavity 7 cannot enter the body outlet end inner cavity 8 through the three-way ball valve 17 and a pipeline I15, the piston 6 moves downwards under pressure because the area of an outer ring of the piston 6 is larger than that of an inner ring of a body outlet end inner cavity spigot 14, an extending end face 13 below the piston is matched with the body outlet end inner cavity spigot 14 after the piston 6 moves downwards to seal and cut off the liquid flowing from the body inlet end inner cavity 12 to the body outlet end inner cavity 8, and the valve is closed.

2. When liquid flows from the body outlet end inner cavity 8 to the body inlet end inner cavity 12, the switch position of the three-way ball valve 17 is arranged between the piston inner cavity 7 and the body inlet end inner cavity 12 and the piston inner cavity 7 and the body outlet end inner cavity 8 are opened, the liquid in the valve body outlet end inner cavity 8 enters the piston inner cavity 7 through the pipeline I15 and the three-way ball valve 17, meanwhile, the liquid in the piston inner cavity 7 cannot enter the valve body inlet end inner cavity 12 through the three-way ball valve 17 and the pipeline I15, when the liquid pressure in the piston inner cavity 7 is the same as the liquid pressure in the body outlet end inner cavity 8, the piston 6 moves downwards under the action of self weight, the extending end surface 13 below the piston is matched with the body outlet end inner cavity spigot 14 after the piston 6 moves downwards to seal and cut off the liquid flowing from the body outlet end inner cavity 8 to the body inlet end inner cavity 12, and the valve is closed; the switch position of a three-way ball valve 17 is arranged in a piston inner cavity 7 and a body inlet end inner cavity 12 to be opened, the piston inner cavity 7 and a body outlet end inner cavity 8 are closed, liquid in the body outlet end inner cavity 8 cannot enter the piston inner cavity 7 through a pipeline I15 and the three-way ball valve 17, meanwhile, the liquid in the piston inner cavity 7 enters the body inlet end inner cavity 12 through the three-way ball valve 17 and a pipeline I15, the piston 6 is pushed by the liquid in the body outlet end inner cavity 8 to move upwards due to the fact that the area of an outer ring of the piston 6 is larger than that of an inner ring of the body outlet end inner cavity spigot 14, an extending end face 13 below the piston leaves the body outlet end inner cavity spigot 14 when the piston 6 moves upwards, the liquid in the body outlet end inner cavity 8 flows into the body inlet end inner cavity 12 through the body outlet end inner cavity spigot 14, and the valve is opened.

3. The specific description is as follows: when liquid flows from the inner cavity 12 of the body inlet end to the inner cavity 8 of the body outlet end, or when liquid flows from the inner cavity 8 of the body outlet end to the inner cavity 12 of the body inlet end, after the three-way ball valve 17 is operated, the liquid can only flow in one direction, but not in the other direction, so that the three-way ball valve only has the functions of one-way flow and one-way flow interception.

Example 12

In the Z-shaped liquid control valve one-way double intercepting valve, the piston inner chamber 7 is connected with the three-way valve 17 through the pipeline i 15, one outlet of the three-way valve 17 is connected with the valve body inlet inner chamber 12 through the pipeline i 15 and the check valve 18, and the other outlet is connected with the valve body outlet inner chamber 8 through the pipeline i 15, as shown in fig. 28.

The specific description is as follows: this embodiment can employ any of the configurations of the present invention to assemble pipes and valves in accordance with the principles of the present invention as shown in fig. 28.

1. When liquid flows from the inner cavity 12 of the body inlet end to the inner cavity 8 of the body outlet end, the switch position of the three-way ball valve 17 is arranged between the inner cavity 7 of the piston and the inner cavity 12 of the body inlet end to be closed, the inner cavity 7 of the piston and the inner cavity 8 of the body outlet end are opened, the liquid in the inner cavity 12 of the body inlet end cannot enter the inner cavity 7 of the piston through the pipeline I15, the check valve 18 and the three-way ball valve 17, meanwhile, the liquid in the inner cavity 7 of the piston can enter the inner cavity 8 of the body outlet end through the three-way ball valve 17 and the pipeline I15, at the moment, the piston 6 cannot be pressed, the extending end surface 13 below the piston leaves the spigot 14 of the inner cavity 12 of the body outlet end under the pushing of the liquid in the inner cavity 12 of the body inlet end, the liquid in the inner cavity 12 of the body inlet end enters the inner cavity 8 of the body outlet end through the spigot 14 of the inner cavity of the body outlet end, and the valve is opened; the switch position of a three-way ball valve 17 is arranged in a piston inner cavity 7 and a body inlet end inner cavity 12 to be opened, the piston inner cavity 7 and a valve body outlet end inner cavity 8 are closed, liquid in the body inlet end inner cavity 12 enters the piston inner cavity 7 through a pipeline I15, a check valve 18 and the three-way ball valve 17, meanwhile, the liquid in the piston inner cavity 7 cannot enter the body outlet end inner cavity 8 through the three-way ball valve 17 and the pipeline I15, the piston 6 moves downwards under pressure because the area of an outer ring of the piston 6 is larger than that of an inner ring of a body outlet end inner cavity spigot 14, an extending end face 13 below the piston is matched with the body outlet end inner cavity spigot 14 after the piston 6 moves downwards to seal and cut off the liquid flowing from the body inlet end inner cavity 12 to the body outlet end inner cavity 8, and the valve is closed.

2. When liquid flows from the body outlet end inner cavity 8 to the body inlet end inner cavity 12, the switch position of the three-way ball valve 17 is arranged between the piston inner cavity 7 and the body inlet end inner cavity 12 and is closed, the piston inner cavity 7 and the body outlet end inner cavity 8 are opened, the liquid in the body outlet end inner cavity 8 enters the piston inner cavity 7 through the pipeline I15 and the three-way ball valve 17, meanwhile, the liquid in the piston inner cavity 7 cannot enter the body inlet end inner cavity 12 through the three-way ball valve 17, the check valve 18 and the pipeline I15, when the liquid pressure in the piston inner cavity 7 is the same as the liquid pressure in the body outlet end inner cavity 8, the piston 6 moves downwards under the action of self weight, the extending end surface 13 below the piston is matched with the body outlet end inner cavity spigot 14 after the piston 6 moves downwards to seal and cut off the liquid flowing from the body outlet end inner cavity 8 to the body inlet end inner cavity 12, and the valve is closed; the switch position of the three-way ball valve 17 is arranged in the piston inner cavity 7 and the body inlet end inner cavity 12 to be opened, the piston inner cavity 7 and the body outlet end inner cavity 8 are closed, liquid in the body outlet end inner cavity 8 passes through the pipeline I15, the three-way ball valve 17 cannot enter the piston inner cavity 7, meanwhile, liquid in the piston inner cavity 7 passes through the three-way ball valve 17, the check valve 18 and the pipeline I15 and cannot enter the body inlet end inner cavity 12, therefore, the piston 6 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 13

In the check valve and shutoff valve of the Z-shaped liquid control valve, the inner cavity 7 of the piston is connected with the inlet end inner cavity 12 through the pipeline I15 and the inlet end two-way valve I19, and the inner cavity 7 of the piston is connected with the outlet end inner cavity 8 through the pipeline I15 and the outlet end two-way valve II 20, as shown in fig. 29.

The specific description is as follows: this embodiment can employ any of the configurations of the present invention to assemble pipes and valves in accordance with the principles of the present invention as shown in fig. 29.

The working principle is as follows:

1. when liquid flows from the body inlet end inner cavity 12 to the body outlet end inner cavity 8, the inlet end two-way valve I19 is closed, the outlet end two-way valve II 20 is opened, the liquid in the body inlet end inner cavity 12 cannot flow into the piston inner cavity 7, the liquid in the piston inner cavity 7 can flow into the body outlet end inner cavity 8 through the pipeline I15 and the outlet end two-way valve II 20, at the moment, the piston 6 cannot be pressed, the extending end surface 13 below the piston leaves the body outlet end inner cavity spigot 14 under the pushing of the liquid in the valve body inlet end inner cavity 12, the liquid in the body inlet end inner cavity 12 enters the body outlet end inner cavity 8 through the valve body outlet end inner cavity spigot 14, and the valve is opened; when liquid flows from the body outlet end inner cavity 8 to the valve body inlet end inner cavity 12, the liquid pressure in the piston inner cavity 7 depends on the liquid in the body outlet end inner cavity 8 entering the piston inner cavity 7, when the liquid pressure in the piston inner cavity 7 is the same as the liquid pressure in the body outlet end inner cavity 8, the piston 6 can move downwards under the action of self weight, the extending end surface 13 below the piston is matched with the body outlet end inner cavity spigot 14 after the piston 6 moves downwards to seal and cut off the liquid flow of the valve body outlet end inner cavity 8 to the body inlet end inner cavity 12, 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 8 to the body inlet end inner cavity 12, the outlet end two-way valve II 20 is closed, the inlet end two-way valve I19 is opened, the liquid in the body outlet end inner cavity 8 cannot flow into the piston inner cavity 7, the liquid in the piston inner cavity 7 can flow into the valve body inlet end inner cavity 12 through the pipeline I15 and the inlet end two-way valve I19, the piston 6 is pushed to move upwards by the liquid in the valve body outlet end inner cavity 8 due to the fact that the area of an outer ring of the piston 6 is larger than the area of an inner ring of the body outlet end inner cavity spigot 14, the piston lower extending end face 13 is separated from the body outlet end inner cavity spigot 14 when the piston 6 moves upwards, the liquid in the body outlet end inner cavity 8 flows into the body inlet end inner cavity 12 through the body outlet end inner cavity spigot 14, and the valve is opened; when liquid flows from the body inlet end inner cavity 12 to the body outlet end inner cavity 8, the liquid pressure in the piston inner cavity 7 depends on the liquid in the body inlet end inner cavity 12 entering the piston inner cavity 7, when the pressure in the piston inner cavity 7 is the same as the body inlet end inner cavity 12, the piston 6 can move downwards under the action of the liquid pressure because the area of the outer ring of the piston 6 is larger than the area of the inner ring of the body outlet end inner cavity spigot 14, the extending end surface 13 below the piston is matched with the valve body outlet end inner cavity spigot 14 after the piston 6 moves downwards to seal and cut off the liquid in the body inlet end inner cavity 12 from flowing to the body outlet end inner cavity 8, and the valve is closed to achieve the purpose of non-return.

3. The specific description is as follows: when liquid flows from the body inlet end inner cavity 12 to the body outlet end inner cavity 8 or when liquid flows from the body outlet end inner cavity 8 to the body inlet end inner cavity 12, the inlet end two-way valve I19 and the outlet end two-way valve II 20 are operated, one two-way valve 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 14

In the two-way single-shutoff valve of the Z-shaped liquid control valve, the piston inner cavity 7 is connected with the inlet inner cavity 12 through the pipeline i 15, the inlet two-way valve i 19 and the half-closed check valve 34, and the piston inner cavity 7 is connected with the outlet inner cavity 8 through the pipeline i 15, the outlet two-way valve ii 20 and the half-closed check valve 34, as shown in fig. 30.

The specific description is as follows: this embodiment can employ any of the configurations of the present invention to assemble pipes and valves in accordance with the principles of the present invention as shown in fig. 30.

The working principle is as follows:

1. when liquid flows from the body inlet end inner cavity 12 to the body outlet end inner cavity 8, the inlet end two-way valve I19 and the outlet end two-way valve II 20 are opened, the semi-closed check valve 34 arranged on the pipeline I15 of the body inlet end inner cavity 12 is closed by half in a non-return manner, the semi-closed check valve 34 arranged on the pipeline I15 of the body outlet end inner cavity 8 is fully opened, the liquid in the body inlet end inner cavity 12 enters the piston inner cavity 7 through the pipeline I15, the semi-closed check valve 34, the inlet end two-way valve I19 and the pipeline I15, because the semi-closed check valve 34 arranged on the pipeline I15 of the body outlet end inner cavity 8 is fully opened, the amount of the liquid entering the piston inner cavity 7 is smaller than the amount flowing to the body outlet end inner cavity 8, the piston 6 cannot be pressed, the extending end surface 13 below the piston leaves the body outlet end inner cavity seam allowance 14 under the push of the liquid in the body inlet end inner cavity 12, and the liquid in the body inlet end inner cavity 12 enters the body outlet end inner cavity 8 through the body outlet end inner cavity seam allowance 14, opening a valve; opening the inlet two-way valve I19, closing the outlet two-way valve II 20, at this time, half of the check valve 34 installed on the pipeline I15 of the inner cavity 12 of the inlet valve body is closed in a check mode, and all the check valves are not closed, so that liquid in the inner cavity 12 of the inlet valve body can enter the inner cavity 7 of the piston through the half-closed check valve 34, the inlet two-way valve I19 and the pipeline I15, and due to the fact that the outlet two-way valve II 20 is closed, the liquid in the inner cavity 12 of the inlet valve body cannot flow into the inner cavity 8 of the outlet valve body, the area of an outer ring of the piston 6 is larger than that of an inner ring of the spigot 14 of the outlet valve body, the piston 6 moves downwards under pressure, the extension end face 13 below the piston and the spigot 14 of the outlet valve body are matched with the spigot 14 of the outlet end inner cavity to seal and cut off the liquid flowing from the inner cavity 12 of the inlet valve body to the outlet end inner cavity 8, and the valve is closed.

2. When liquid flows from the body outlet end inner cavity 8 to the body inlet end inner cavity 12, the inlet end two-way valve I19 and the outlet end two-way valve II 20 are opened, the semi-closed check valve 34 installed on the pipeline I15 of the body outlet end inner cavity 8 is closed in a non-return mode by a half, the semi-closed check valve 34 installed on the pipeline I15 of the body inlet end inner cavity 12 is fully opened, the liquid in the body outlet end inner cavity 8 enters the piston inner cavity 7 through the pipeline I15, the semi-closed check valve 34, the outlet end two-way valve II 20 and the pipeline I15, because the semi-closed check valve 34 installed on the pipeline I15 of the body inlet end inner cavity 12 is fully opened, the amount of the liquid entering the piston inner cavity 7 is smaller than the amount flowing into the body inlet end inner cavity 12, because the area of an outer ring of the piston 6 is larger than the area of an inner ring of the body outlet end inner cavity spigot 14, the piston 6 is pushed by the liquid of the body outlet end inner cavity 8 to move upwards, the extension end surface 13 below the piston leaves the body outlet end inner cavity spigot 14 when the piston 6 moves upwards, the liquid in the inner cavity 8 of the body outlet end flows into the inner cavity 12 of the body inlet end through the spigot 14 of the inner cavity of the body outlet end, and the valve is opened; the inlet end two-way valve I19 is closed, the outlet end two-way valve II 20 is opened, at the moment, the half-closed check valve 34 installed on the pipeline I15 of the valve body outlet end inner cavity 8 is half closed and is not completely closed, so that liquid in the valve body outlet end inner cavity 8 can enter the piston inner cavity 7 through the pipeline I15, the half-closed check valve 34, the outlet end two-way valve II 20 and the pipeline I15, due to the fact that the inlet end two-way valve I19 is closed, the liquid in the body outlet end inner cavity 8 cannot flow to the body inlet end inner cavity 12 from the piston inner cavity 7, when the liquid pressure in the piston inner cavity 7 is the same as the liquid pressure in the body outlet end inner cavity 8, the piston 6 can move downwards under the action of self weight, the extending end face 13 below the piston is matched with the body outlet end inner cavity spigot 14 after the piston 6 moves downwards, the liquid in the body outlet end inner cavity 8 is sealed and cut off, the liquid in the body outlet end inner cavity 8 flows to the valve body inlet end inner cavity 12, and the valve is closed.

3. The specific description is as follows: when liquid flows to the body outlet end inner cavity 8 from the body inlet end inner cavity 12 or when liquid flows to the body inlet end inner cavity 12 from the body outlet end inner cavity 8, the inlet end two-way valve I19 and the outlet end two-way valve II 20 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 be intercepted in one direction.

Example 15

In the above two-way double-shutoff valve of the Z-shaped liquid control valve, the piston inner chamber 7 is connected with a tee joint i 21 through a two-way valve iv 36, two outlets of the tee joint i 21 are respectively provided with a check valve 18, an outlet of the check valve 18 is connected into the inner chamber 12 through a pipeline i 15 connector, an outlet of the check valve 18 is connected into the inner chamber 8 through a pipeline i 15 connector, the piston inner chamber 7 is connected with a tee joint ii 22 through a two-way valve v 37, two outlets of the tee joint ii 22 are respectively provided with a check valve 18, an outlet of the check valve 18 is connected into the inner chamber 12 through a pipeline i 15 connector, and an outlet of the check valve 18 is connected into the inner chamber 8 through a pipeline i 15 connector, as shown in fig. 31.

The specific description is as follows: this embodiment can employ any of the configurations of the present invention to assemble pipes and valves in accordance with the principles of the present invention as shown in fig. 31.

The working principle is as follows:

1. when the liquid flows from the body inlet end inner cavity 12 to the body outlet end inner cavity 8, the two-way valve IV 36 is closed, the two-way valve V37 is opened, and under the state, the two-way valve IV 36 cuts off the liquid of the body inlet end inner cavity 12 and the body outlet end inner cavity 8 connected with the tee joint I21 and enters the piston inner cavity 7; the two-way valve V37 is in an open state, a tee joint II 22 connected with the two-way valve V37 is connected with the body inlet end inner cavity 12 through a check valve 18 and a pipeline I15, but the check valve 18 is used for stopping the body inlet end inner cavity 12, so that liquid in the body inlet end inner cavity 12 cannot enter the piston inner cavity 7; the two-way valve V37 is in an open state, the three-way valve II 22 connected with the two-way valve V37 does not stop the liquid in the piston inner cavity 7 through the check valve 18 and the check valve 18 of the outlet end inner cavity 8 of the connector I15, so that the liquid in the piston inner cavity 7 can flow into the body outlet end inner cavity 8 through the two-way valve V37 and the three-way valve II 22 through the check valve 18 and the pipeline I15, at the moment, the piston 6 cannot be pressed, the extending end surface 13 below the piston leaves the body outlet end inner cavity spigot 14 under the pushing of the liquid in the body inlet end inner cavity 12, the liquid in the body inlet end inner cavity 12 enters the body outlet end inner cavity 8 through the body outlet end inner cavity spigot 14, and the valve is opened.

2. When the liquid flows from the body outlet end inner cavity 8 to the body inlet end inner cavity 12, the two-way valve IV 36 is closed, the two-way valve V37 is opened, and under the state, the two-way valve IV 36 cuts off the liquid of the body inlet end inner cavity 12 and the body outlet end inner cavity 8 connected with the tee joint I21 and enters the piston inner cavity 7; the two-way valve V37 is in an open state, a tee joint II 22 connected with the two-way valve V37 is connected with the outlet end inner cavity 8 through a check valve 18 and a pipeline I15, but the check valve 18 is used for checking the outlet end inner cavity 8, so that liquid in the outlet end inner cavity 8 cannot enter the piston inner cavity 7; the two-way valve V37 is in an open state, the three-way valve II 22 connected with the two-way valve V37 is connected with the check valve 18 of the inlet end inner cavity 12 through the check valve 18 and the pipeline I15 and does not return liquid in the piston inner cavity 7, so that the liquid in the piston inner cavity 7 can flow into the body inlet end inner cavity 12 through the two-way valve V37 and the three-way valve II 22 through the check valve 18 and the pipeline I15, the piston 6 is pushed by the liquid in the body outlet end inner cavity 8 to move upwards due to the fact that the area of an outer ring of the piston 6 is larger than that of an inner ring of the body outlet end inner cavity spigot 14, the piston lower extending end face 13 leaves the body outlet end inner cavity spigot 14 when the piston 6 moves upwards, the liquid in the body outlet end inner cavity 8 flows into the body inlet end inner cavity 12 through the body outlet end inner cavity spigot 14, and the valve is opened.

3. When liquid flows from the body inlet end inner cavity 12 to the body outlet end inner cavity 8, the two-way valve IV 36 is opened, the two-way valve V37 is closed, under the condition, the two-way valve V37 cuts off the liquid in the body inlet end inner cavity 12 and the body outlet end inner cavity 8 which are connected by the tee joint II 22, and the liquid enters the piston inner cavity 7, the two-way valve IV 36 is in an open state, the tee joint I21 connected with the two-way valve IV 36 is connected with the outlet end inner cavity 8 through the check valve 18 and the pipeline I15, but the check valve 18 is used for checking the liquid in the piston inner cavity 8, so that the liquid in the body inlet end inner cavity 12 cannot enter the body outlet end inner cavity 8, the two-way valve IV 36 is in an open state, the tee joint I21 connected with the two-way valve IV 36 enters the body inner cavity 12 through the check valve 18 and the pipeline I15, but the check valve 18 is used for checking the liquid in the body inlet end inner cavity 12, so that the liquid in the body inlet end inner cavity 12 can enter the piston inner cavity 7, because the area of the outer ring of the piston 6 is larger than that of the inner ring of the body outlet end inner cavity spigot 14, the piston 6 moves downwards under pressure, the extending end surface 13 below the piston is matched with the body outlet end inner cavity spigot 14 after the piston 6 moves downwards to seal and cut off the liquid flowing from the body inlet end inner cavity 12 to the body outlet end inner cavity 8, and the valve is closed.

4. When liquid flows from the body inlet end inner cavity 8 to the body outlet end inner cavity 12, the two-way valve IV 36 is opened, the two-way valve V37 is closed, under the condition, the two-way valve V37 cuts off the liquid in the body inlet end inner cavity 12 and the body outlet end inner cavity 8 which are connected by the tee joint II 22, and the liquid enters the piston inner cavity 7, the two-way valve IV 36 is in an open state, the tee joint I21 connected with the two-way valve IV 36 enters the body inlet end inner cavity 12 through the check valve 18 and the pipeline I15, but the check valve 18 does not check the liquid in the piston inner cavity 7, so the liquid in the body outlet end inner cavity 8 cannot enter the body inlet end inner cavity 12, the two-way valve IV 36 is in an open state, the tee joint I21 connected with the two-way valve IV 36 passes through the check valve 18 and the pipeline I15 and the connector outlet end inner cavity 8, but the check valve 18 does not check the liquid in the body outlet end inner cavity 8, so the liquid in the body outlet end inner cavity 8 can enter the piston inner cavity 7, when the liquid pressure in the piston inner cavity 7 is the same as the liquid pressure in the body outlet end inner cavity 8, the piston 6 moves downwards under the action of self weight, the extending end surface 13 below the piston is matched with the body outlet end inner cavity spigot 14 after the piston 6 moves downwards to seal and cut off the liquid flowing from the body outlet end inner cavity 8 to the body inlet end inner cavity 12, and the valve is closed.

5. The specific description is as follows: when liquid flows from the body inlet end inner cavity 12 to the body outlet end inner cavity 8 or when liquid flows from the body outlet end inner cavity 8 to the body inlet end inner cavity 12, the two-way valve IV 36 is closed, the two-way valve V37 is opened, and the fluid can flow in two directions; the two-way valve IV 36 is opened, the two-way valve V37 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 16

In the Z-shaped liquid control valve ball cock, the piston cavity 7 is connected with the inlet cavity 12 through the pipe i 15 and the inlet two-way valve i 19, the piston cavity 7 is connected with the ball cock 23 through the outlet two-way valve ii 20 and the pipe i 15, and the flange 24 of the body outlet cavity is connected with the pipe ii 25 to the liquid pool 26, as shown in fig. 32.

The specific description is as follows: this embodiment can employ any of the configurations of the present invention to assemble pipes and valves in accordance with the principles of the present invention, as shown in fig. 32.

The working principle is as follows:

liquid flows from the body inlet end inner cavity 12 to the body outlet end inner cavity 8, the inlet end two-way valve I19 and the outlet end two-way valve II 20 are opened, the opening degree of the inlet end two-way valve I19 is set to be smaller than that of the outlet end two-way valve II 20, the liquid in the body inlet end inner cavity 12 enters the piston inner cavity 7 through the pipeline I15 and the inlet end two-way valve I19 and then enters the air of the liquid pool 26 through the outlet end two-way valve II 20, the pipeline I15 and the ball float valve 23, at the moment, the piston 6 cannot be pressed, the extending end face 13 below the piston leaves the body outlet end inner cavity spigot 14 under the pushing of the liquid in the body inlet end inner cavity 12, the liquid in the body inlet end inner cavity 12 enters the body outlet end inner cavity 8 through the body outlet end inner cavity spigot 14, and enters the liquid pool 26 through the pipeline II 25 connected with the flange 24 of the body outlet end inner cavity; when the liquid in the liquid pool 26 rises to the float valve 23, the float valve 23 is closed, the liquid in the body inlet end inner cavity 12 enters the piston inner cavity 7 through the inlet end two-way valve I19 and the pipeline I15, then the liquid cannot enter the air in the liquid pool 26 through the outlet end two-way valve II 20, the pipeline I15 and the float valve 23, the piston 6 moves downwards under pressure because the area of the outer ring of the piston 6 is larger than the area of the inner ring of the body outlet end inner cavity spigot 14, the piston lower extending end surface 13 is matched with the body outlet end inner cavity spigot 14 after the piston 6 moves downwards to seal and cut off the liquid flowing from the body inlet end inner cavity 12 to the body outlet end inner cavity 8, and the valve is closed.

Example 17

The Z-shaped liquid control valve flow limiting valve is also a check valve, a piston cavity 7 is connected with one outlet of a three-way pilot valve I27 through a check valve 18 and a pipeline I15, the other outlet of the three-way pilot valve I27 is connected with a liquid inlet 28 of a pump 35 through a pipeline I15, an inlet of a three-way pilot valve I27 is connected with an inlet cavity 12 through a pipeline I15 and an inlet two-way valve I19, a hand wheel 29 is arranged on a three-way pilot valve I27, and the piston cavity 7 is connected with an outlet cavity 8 through a pipeline I15 and an outlet two-way valve II 20, as shown in 33.

The three-way pilot valve I27 in this embodiment is a hand wheel three-way pilot valve.

The specific description is as follows: this embodiment can employ an optional configuration of the present invention to assemble the tubing, valve, pilot valve, as shown in fig. 33, while following the principles of the present invention.

The working principle is as follows:

1. starting the pump 35, allowing liquid to flow from the body inlet end inner cavity 12 to the body outlet end inner cavity 8, opening the inlet end two-way valve I19 and the outlet end two-way valve II 20, and setting the opening degree of the inlet end two-way valve I19 to be smaller than that of the outlet end two-way valve II 20, so that the piston 6 cannot be pressed, the end surface 13 extending below the piston leaves the body outlet end inner cavity spigot 14 under the pushing of the liquid in the body inlet end inner cavity 12, the liquid in the body inlet end inner cavity 12 enters the body outlet end inner cavity 8 through the body outlet end inner cavity spigot 14, and the valve is opened; the hand wheel 29 is adjusted to ensure that the flow rate of the liquid in the inlet end 28 of the pump 35 entering the three-way pilot valve I27 through the pipeline I15 and the check valve 18 entering the piston cavity 7 ensures that the pressure in the outlet cavity 8 of the valve body is at a set value; when the liquid flow in the inlet end 28 of the pump 35 changes, the sensing die in the three-way pilot valve I27 controls the liquid entering the piston cavity 7 through the pipeline I15 and the check valve 18, so that the opening degree of the piston 6 changes, the pressure in the body outlet cavity 8 is ensured not to change along with the change of the liquid flow in the inlet end 28 of the pump 35, and the purpose of flow limitation is achieved.

2. The pump 35 is closed, liquid flows from the body outlet end inner cavity 8 to the body inlet end inner cavity 12, because the check valve 18 performs check on the piston inner cavity 7, the liquid in the piston inner cavity 7 cannot flow to the body inlet end inner cavity 12 through the check valve 18, the pipeline I15, the three-way pilot valve I27 and the inlet two-way valve I19, and cannot flow to the inlet end 28 of the pump 35 through the pipeline I15, the liquid in the body outlet end inner cavity 8 enters the piston inner cavity 7 through the outlet two-way valve II 20 through the pipeline I15, when the liquid pressure in the piston inner cavity 7 is the same as the liquid pressure in the body outlet end inner cavity 8, the piston 6 moves downwards under the action of self weight, the extending end face 13 below the piston is matched with the body outlet end inner cavity spigot 14 after the piston 6 moves downwards to seal and cut off the liquid flowing from the body outlet end inner cavity 8 to the body inlet end inner cavity 12, and the valve is closed, so that the purpose of check is achieved.

Example 18

In the pressure reducing and stabilizing valve of the Z-shaped liquid control valve, the piston cavity 7 is connected with an inlet of the two-way valve 30 through the pipeline i 15, an outlet of the two-way valve 30 is connected with the outlet cavity 8 through the outlet two-way valve ii 20 and the pipeline i 15, the piston cavity 7 is connected with the inlet cavity 12 through the pipeline i 15 and the inlet two-way valve i 19, and the top of the two-way valve 30 is provided with the screw rod 31 as shown in fig. 34.

The specific description is as follows: this embodiment can employ an optional configuration of the present invention to assemble the tubing, valve, pilot valve, as shown in fig. 34, while following the principles of the present invention.

The working principle is as follows:

liquid flows from the body inlet end inner cavity 12 to the body outlet end inner cavity 8, the inlet end two-way valve I19 and the outlet end two-way valve II 20 are opened, the opening degree of the inlet end two-way valve I19 is set to be smaller than that of the outlet end two-way valve II 20, at the moment, the piston 6 cannot be pressed, the extending end face 13 below the piston is pushed by the liquid in the body inlet end inner cavity 12 to leave the body outlet end inner cavity spigot 14, the liquid in the body inlet end inner cavity 12 enters the body outlet end inner cavity 8 through the body outlet end inner cavity spigot 14, and the valves are opened; the flow rate of the liquid in the piston cavity 7 entering the body outlet cavity 8 through the outlet two-way valve II 20 can be set at a value by adjusting the screw rod 31 on the two-way valve 30, so that the liquid pressure in the body outlet cavity 8 is fixed at a set value; when the liquid pressure in the body outlet end cavity 8 changes, the induction module in the two-way valve 30 can control the flow entering the body outlet end cavity 8 from the piston cavity 7, so that the opening degree of the piston 6 changes along with the change of the liquid pressure in the body outlet end cavity 8, and the purposes of pressure reduction and pressure stabilization are achieved.

Example 19

In the Z-shaped liquid control valve relief valve, the piston cavity 7 is connected with one outlet of the three-way pilot valve II32 through the pipeline I15, the other outlet of the three-way pilot valve II32 is connected with the inlet of the three-way pilot valve II32 through the outlet two-way valve II 20 and the outlet cavity 8 of the pipeline I15 connector, the body inlet cavity 12 is connected with the inlet of the three-way pilot valve II32 through the inlet two-way valve I19 and the pipeline I15, the piston cavity 7 is connected with the outlet cavity 8 of the pipeline I15 connector through the two-way valve III 33, and the top of the three-way pilot valve II32 is provided with the screw 31 as shown in figure 35.

The specific description is as follows: this embodiment can employ an optional configuration of the present invention to assemble the tubing, valve, pilot valve, as shown in fig. 35, while following the principles of the present invention.

The working principle is as follows:

1. liquid flows from the body outlet end inner cavity 8 to the body inlet end inner cavity 12, and the inlet end two-way valve I19, the outlet end two-way valve II 20 and the two-way valve III 33 are opened; liquid in the inner cavity 8 of the body outlet end enters the piston inner cavity 7 through the pipeline I15 and the two-way valve III 33 and enters the three-way pilot valve II32 through the pipeline I15 and the outlet end two-way valve II 20; adjusting the top screw 31 of the three-way pilot valve II32 to a certain position, when the pressure in the body outlet cavity 8 rises to a set value, the liquid pressure in the body outlet cavity 8 enters the three-way pilot valve II32 through the pipeline I15 and the outlet two-way valve II 20 to open the pipeline of the three-way pilot valve II32 to connect the pipeline I15 and the inlet two-way valve I19, the liquid in the piston cavity 7 enters the pipeline of the three-way pilot valve II32 through the pipeline I15 to drain the liquid in the piston cavity 7 into the body inlet cavity 12, the liquid amount of the liquid in the body outlet cavity 8 entering the piston cavity 7 from the pipeline I15 and the two-way valve III 33 is set to be smaller than the liquid amount drained from the piston cavity 7 into the body inlet cavity 12, because the area of the outer ring of the piston 6 is larger than the area of the inner ring of the body outlet cavity spigot 14, the piston 6 is pushed by the liquid in the body outlet cavity 8 to move upwards, the extension end face 13 below the piston leaves the body outlet cavity spigot 14 when the piston 6 moves upwards, the liquid in the inner cavity 8 of the body outlet end flows into the inner cavity 12 of the body inlet end through the spigot 14 of the inner cavity of the body outlet end, and the valve is opened to achieve the purpose of pressure relief.

2. When the liquid pressure in the valve body outlet end inner cavity 8 is lower than the set value, the liquid pressure in the valve body outlet end inner cavity 8 can not open the pipeline connecting the three-way pilot valve II32 with the pipeline I15 and the inlet two-way valve I19 and the pipeline connecting the piston inner cavity 7 with the three-way pilot valve II32 through the pipeline I15 after the liquid pressure in the three-way pilot valve II32 is lower than the set value, so that the liquid in the piston inner cavity 7 can not be discharged into the body inlet end inner cavity 12, but the liquid in the body outlet end inner cavity 8 can enter the piston inner cavity 7 through the pipeline I15 and the two-way valve III 33, when the liquid pressure in the piston inner cavity 7 is the same as the liquid pressure in the body outlet end inner cavity 8, the piston 6 moves downwards under the action of the self weight, the extending end surface 13 below the piston moves downwards to be matched with the valve body outlet end inner cavity spigot 14 to seal and cut off the liquid flowing to the body inlet end inner cavity 12 from the body outlet end inner cavity 8, the valve is closed and no pressure is released.

The above-described embodiments are set forth so that this disclosure will be thorough and complete, and will not be limited by any theory presented in the preceding claims, which may suggest themselves to those skilled in the art after reading this disclosure and all equivalents thereof that fall within the scope of the utility model as defined in the claims appended hereto.

Claims

1. A Z-shaped liquid control valve comprises a cover (1), a body (3), a sealing ring groove (4), a sealing ring (5), a piston (6), an end surface (13) extending below the piston and a spigot (14) of an inner cavity of an outlet end of the body; the method is characterized in that: the arrangement mode of the sealing ring groove (4) adopts one of the following seven modes:

is arranged on the cover (1),

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) between the cover (1) and the body (3),

are arranged on the cover (1) and the seat (2) simultaneously,

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 sealing ring (5) is arranged in the sealing ring groove (4), the piston (6) is arranged in the sealing ring (5), the cover (1) and the body (3) or the cover (1), the seat (2) and the body (3) are sealed into a whole, and the piston (6) and an extending end surface (13) below the piston form a whole; the cover (1) is internally provided with a piston inner cavity (7), and the body (3) is provided with a body inlet end inner cavity (12) and a body outlet end inner cavity (8); a body outlet end inner cavity spigot (14) is arranged between the body inlet end inner cavity (12) and the body outlet end inner cavity (8);

the outer ring (9) of the sealing ring is sealed with the sealing ring groove (4), and the inner ring (10) of the sealing ring is statically sealed and slidably sealed with the outer ring (11) of the piston, so that the inner cavity (7) of the piston is sealed with the inner cavity (8) of the outlet end of the piston;

and the extending end surface (13) below the piston is matched and sealed with the spigot (14) of the inner cavity of the outlet end of the body after the piston (6) moves, so that the inner cavity (12) of the inlet end of the body and the inner cavity (8) of the outlet end of the body are sealed.

2. The Z-type liquid control valve of claim 1, wherein: the plane of the sealing ring groove (4) is circular, the structural shape of the cross section is concave (49), the plane of the sealing ring (5) is circular, the shape of the cross section is V-shaped (50), the plane of the piston (6) is circular, the shape of the cross section is U-shaped (56), and the plane of the outlet end inner cavity spigot (14) is circular.

3. The Z-type liquid control valve of claim 2, wherein: the inner diameter of play end inner chamber tang (14) is less than the external diameter of piston (6), the circle plane of sealing washer groove (4) with the circle plane interval of body play end inner chamber tang (14) is parallel, the coincidence of central line position, the circle plane central line position of sealing washer groove (4) with arrange in the coincidence of central line position of piston (6) in sealing washer (5), when sealing washer (5) were arranged in piston (6) piston outer lane (11) and inner circle (10) contact of sealing washer are arranged in the direction of piston inner diameter mouth (51) of piston (6) in sealing washer (5) is towards piston inner chamber (7) or towards the opposite direction of piston inner chamber (7).

4. The Z-type liquid control valve of claim 2, wherein: the piston (6) and the piston lower extension end face (13) are vertically connected and fixed into a whole, the piston lower extension end face (13) is provided with a sealing face I (38), the sealing of the outer ring (9) of the sealing ring and the sealing ring groove (4) means that the outer ring (9) of the sealing ring has elastic retention and is in contact sealing with the sealing ring groove (4), the static sealing and sliding sealing of the inner ring (10) of the sealing ring and the piston outer ring (11) means that the inner ring (10) of the sealing ring has elastic retention and is in contact static sealing and sliding sealing with the piston outer ring (11), the outer ring (9) of the sealing ring and the inner ring (10) of the sealing ring have elastic retention, once the sealing ring expansion port (48) is pressed by liquid, the sealing ring (5) can expand and stretch along with the increase and decrease of the liquid pressure, and if the sealing ring expansion port (48) is pressed by the liquid pressure, the sealing ring (5) can not expand and stretch along with the increase of the liquid pressure in the opposite direction, The expansion and the contraction are reduced, the sealing ring (5) is arranged in the sealing ring groove (4), and the direction of the sealing ring expansion opening (48) faces towards the piston inner cavity (7) or the direction opposite to the piston inner cavity (7).

5. The Z-type liquid control valve of claim 1, wherein: the sealing ring is characterized in that the number of the sealing ring grooves (4) is 1 or more than 1, the number of the installed sealing rings (5) is the same as that of the sealing ring grooves (4), the sealing rings are matched in type, the cover (1) and the body (3) are connected in a sealing mode and fixedly connected into a whole through fasteners, and the sealing is sealed through sealing strips (52).

6. The Z-type liquid control valve of claim 1, wherein: the sealing ring groove (4) is processed on the I-shaped sealing ring groove seat (46), the number of the processed sealing ring grooves (4) is 1 or more than 1, the number of the installed sealing rings (5) is the same as that of the processed sealing ring grooves (4), the models of the installed sealing rings are matched, the I-shaped sealing ring groove seat (46) and the body (3) are connected in a sealing mode and fixedly connected into a whole through fasteners, sealing is sealed through the sealing strips (52), the cover (1) and the body (3) are connected in a sealing mode through the fasteners and fixedly connected into a whole, and sealing is sealed through the sealing strips (52).

7. The Z-type liquid control valve of claim 1, wherein: increase II type sealing washer groove seat (47) between lid (1), body (3), sealing washer groove (4) are processed on II type sealing washer groove seat (47), and the quantity of processing sealing washer groove (4) is 1 or more than 1, and the sealing washer (5) quantity of installation is the same with the sealing washer groove (4) quantity of processing, the model matches, sealing connection adopts fastener fixed connection to become a whole between lid (1), II type sealing washer groove seat (47), body (3), and is sealed to adopt sealing strip (52) to seal.

8. The Z-type liquid control valve of claim 1, wherein:

the sealing ring is characterized in that 1 cut-off opening (40) is arranged above or below the sealing ring groove (4), the ring plane of the cut-off opening (40) is parallel to the ring plane of the sealing ring groove (4) in interval and the center line position of the cut-off opening coincides with the ring plane of the sealing ring groove, the upper outwards extending part (41) of the piston (6) or the lower end face (42) of the piston (6) is matched and sealed with the cut-off opening (40) after the piston (6) moves downwards, meanwhile, the lower extending end face (13) of the piston is matched and sealed with the body outlet end inner cavity cut-off opening (14), the upper outwards extending part (41) of the piston (6) is provided with a sealing face II (53), the lower end face (42) of the piston (6) is provided with a sealing face III (54), the cover (1) and the body (3) are fixedly connected into a whole by adopting a fastening piece in a sealing mode, and the sealing is sealed by adopting a sealing strip (52).

9. The Z-type liquid control valve of claim 1, wherein:

the sealing structure is characterized in that a cut-off opening (40) is formed in the seat (2), the ring plane of the cut-off opening (40) is parallel to the ring plane of the sealing ring groove (4) in distance, the center line positions of the cut-off opening coincide, an upward outwards extending part (41) of the piston (6) or a lower end face (42) of the piston (6) is matched and sealed with the cut-off opening (40) after the piston (6) moves downwards, meanwhile, a downward extending end face (13) of the piston is matched and sealed with a body outlet end inner cavity cut-off opening (14), a sealing face II (53) is formed in the upward outwards extending part (41) of the piston (6), a sealing face III (54) is formed in the lower end face (42) of the piston (6), the cover (1), the seat (2) and the body (3) are fixedly connected into a whole through fasteners in a sealing mode, and sealing is sealed through a sealing strip (52).

10. The Z-type liquid control valve of claim 1, wherein:

a shaft rod (44) extending into the piston inner cavity (7) is arranged on the cover (1), the contact part of the shaft rod (44) and the cover (1) is sealed, and the shaft rod (44) can axially move relative to the cover (1).

11. The Z-type liquid control valve of claim 1, wherein:

the piston inner cavity (7) is connected with the body inlet end inner cavity (12) and the piston inner cavity (7) is connected with the body outlet end inner cavity (8) through a pipeline with a valve or directly connected through a pipeline.

12. The Z-type liquid control valve of claim 11, wherein:

the valve is provided with an electric actuator (43), and the electric actuator (43) performs valve opening and closing.

13. The Z-type liquid control valve according to any one of claims 1 to 12, wherein:

piston inner chamber (7) are through I (15) connection tee bend valve (17) of pipeline, and an export of tee bend valve (17) is through I (15) of pipeline and/or check valve (18) connection body entry end inner chamber (12), another export of tee bend valve (17) is through I (15) connector play end inner chamber (8) of pipeline.

14. The Z-type liquid control valve according to any one of claims 1 to 12, wherein:

the piston inner cavity (7) is connected with the body inlet end inner cavity (12) through a pipeline I (15) and an inlet end two-way valve I (19), and the piston inner cavity (7) is connected with the body outlet end inner cavity (8) through a pipeline I (15) and an outlet end two-way valve II (20); or

Piston inner chamber (7) are through pipeline I (15), input end two-way valve I (19), half close check valve (34) connector input end inner chamber (12), piston inner chamber (7) are through pipeline I (15), output end two-way valve II (20), half close check valve (34) connector output end inner chamber (8).

15. The Z-type liquid control valve according to any one of claims 1 to 12, wherein:

the piston inner cavity (7) is connected with a tee joint I (21) through a two-way valve IV (36), two outlets of the tee joint I (21) are respectively provided with a check valve (18), the outlet of one check valve (18) is connected into the end inner cavity (12) through a pipeline I (15) and the outlet of the other check valve (18) is connected into the end inner cavity (8) through a pipeline I (15);

the piston inner cavity (7) is connected with a tee joint II (22) through a two-way valve V (37), two outlets of the tee joint II (22) are respectively provided with a check valve (18), the outlet of one check valve (18) is connected with the valve body inlet end inner cavity (12) through a pipeline I (15), and the outlet of the other check valve (18) is connected with the outlet end inner cavity (8) through a pipeline I (15).

16. The Z-type liquid control valve according to any one of claims 10-12, wherein:

piston inner chamber (7) are through I (15) of pipeline, the I (19) connector entry end inner chamber (12) of entry end two-way valve, piston inner chamber (7) are through II (20) of delivery end two-way valve, pipeline I (15) connection ball-cock assembly (23), flange (24) connecting tube II (25) to liquid pool (26) of body delivery end inner chamber.

17. The Z-type liquid control valve according to any one of claims 1 to 12, wherein:

piston inner chamber (7) are through an export that check valve (18), pipeline I (15) connect tee bend pilot valve I (27), another export of tee bend pilot valve I (27) is through liquid admission end (28) of pipeline I (15) connection pump (35), the entry of tee bend pilot valve I (27) is through pipeline I (15), admission end two-way valve I (19) connector admission end inner chamber (12), piston inner chamber (7) are through pipeline I (15), the II (20) connector outlet end inner chamber (8) of outlet end two-way valve.

18. The Z-type liquid control valve according to any one of claims 1 to 12, wherein:

the piston inner cavity (7) is connected with an inlet of a two-way valve (30) through a pipeline I (15), an outlet of the two-way valve (30) passes through an outlet two-way valve II (20) and an outlet inner cavity (8) of a connector of the pipeline I (15), the piston inner cavity (7) passes through the pipeline I (15) and an inlet two-way valve I (19) and is connected with an inlet inner cavity (12), and the top of the two-way valve (30) is provided with a screw rod (31); or

The piston inner chamber (7) is connected with an outlet of the three-way pilot valve II (32) through the pipeline I (15), the other outlet of the three-way pilot valve II (32) is connected with the outlet inner chamber (8) through the outlet two-way valve II (20) and the pipeline I (15), the body inlet inner chamber (12) is connected with an inlet of the three-way pilot valve II (32) through the inlet two-way valve I (19) and the pipeline I (15), the piston inner chamber (7) is connected with the outlet inner chamber (8) through the two-way valve III (33) and the pipeline I (15), and the top of the three-way pilot valve II (32) is provided with a screw rod (31).