CN109139947B

CN109139947B - Non-penetrating hydraulic valve piston device

Info

Publication number: CN109139947B
Application number: CN201811095450.8A
Authority: CN
Inventors: 邹勇; 王小晨; 黄丽
Original assignee: Jiangsu Jinshi Machinery Group Co ltd
Current assignee: Jiangsu Jinshi Machinery Group Co ltd
Priority date: 2018-09-19
Filing date: 2018-09-19
Publication date: 2023-11-17
Anticipated expiration: 2038-09-19
Also published as: CN109139947A

Abstract

The invention discloses a flat valve system with a non-penetrating piston, which comprises a flat valve, a piston unit driving the flat valve to open or close and arranged at the upper end of the flat valve, and a valve cover unit used for sealing a cover of the flat valve and arranged at two ends of the flat valve; the piston unit further comprises a cavity with a sliding space, a piston body and a valve rod, wherein the piston body is arranged in the cavity and is of an integrated solid structure, the upper end of the valve rod is connected with the piston body, and the lower end of the valve rod is connected with a valve plate arranged in the flat valve. The invention has the beneficial effects that: firstly, the piston is designed to be solid, so that no leakage point exists, and the sealing performance is safe and reliable; secondly, need not design seal groove on the valve rod, the diameter of valve rod can suitably increase, has improved the intensity of valve rod.

Description

Non-penetrating hydraulic valve piston device

Technical Field

The invention relates to the technical field of valve equipment, in particular to a non-penetrating hydraulic valve piston device.

Background

The valve is a pipeline accessory for opening and closing a pipeline, controlling flow direction, adjusting and controlling parameters (temperature, pressure and flow) of a conveying medium, wherein the hydraulic control valve, for short, the hydraulic valve in the hydraulic system is used for controlling and adjusting the flow direction, pressure and flow of oil in the hydraulic system to enable an actuator and a driving working mechanism thereof to obtain a required movement direction, thrust, movement speed and the like, and the actuator is a driving device capable of providing linear or rotary movement, and uses a certain driving energy source and works under the action of a certain control signal, and the actuator uses liquid, gas, electric power or other energy sources and converts the liquid, gas, electric power or other energy sources into driving actions through a motor, a cylinder or other devices to drive a valve rod on the valve to move so as to realize closing and opening of the valve, such as a spherical plug valve, a gate and a piston type valve.

The existing hydraulic valve piston structure is penetrating type, and the penetrating type structure has four defects: firstly, rubber sealing is adopted between the piston and the valve rod, and the rubber material can age after long service time, so that sealing leakage is caused, and certain potential safety hazard exists; secondly, the valve rod has small diameter and low strength, and is easy to break; thirdly, the connection between the piston and the valve rod is easy to loosen, so that the valve is not opened or closed in place; fourthly, the indication rod is easy to loosen and fall off, and if the indication rod cannot be found in time, casualties can occur on site.

Disclosure of Invention

This section is intended to outline some aspects of embodiments of the application and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section as well as in the description of the application and in the title of the application, which may not be used to limit the scope of the application.

The present application has been made in view of the above-described problems occurring in the prior art.

Therefore, the application aims to provide the non-penetrating piston device which has the characteristics of simple structure, reliable sealing performance, long-term use, high valve rod strength, firm connection part, convenience in installation and disassembly, safety and reliability in use and capability of ensuring the valve switch in place.

In order to solve the technical problems, the invention provides the following technical scheme: a flat valve system with non-penetrating type piston comprises a flat valve, a piston unit driving the flat valve to open and close and arranged at the upper end of the flat valve, and a valve cover unit used for sealing a cover of the flat valve and arranged at two ends of the flat valve; the piston unit further comprises a cavity with a sliding space, a piston body and a valve rod, wherein the piston body is arranged in the cavity and is of an integrated solid structure, the upper end of the valve rod is connected with the piston body, and the lower end of the valve rod is connected with a valve plate arranged in the flat valve.

As a preferred embodiment of the flat valve system with non-penetrating piston according to the invention, the valve system comprises: the piston body also comprises an upper mounting cavity and a lower mounting cavity which are arranged at the upper end and the lower end in a non-penetrating way, and an upper fixing piece and a lower fixing piece which are matched with the outlines of the upper mounting cavity and the lower mounting cavity respectively; the indicating rod penetrates through the upper fixing piece, an upper limiting part is arranged at the part, extending out of the tail end of the indicating rod, the upper fixing piece can be embedded into the upper mounting cavity, and the indicating rod abuts against the bottom of the upper mounting cavity through the upper limiting part; the valve rod penetrates through the lower fixing piece and the tail end of the valve rod is limited by the lower limiting part, the lower fixing piece can be embedded into the lower mounting cavity, and the lower limiting part abuts against the top of the lower mounting cavity.

As a preferred embodiment of the flat valve system with non-penetrating piston according to the invention, the valve system comprises: the piston body further comprises fixing holes, clamping pin pieces, adjusting blocks and sealing grooves which are arranged on two sides; the adjusting block is connected with the piston body through threads, the adjusting block is rotated to enable the adjusting block to move up and down, when the adjusting block is located at a proper position, the adjusting block is penetrated by the clamping pin piece, the extending part of the adjusting block can be inserted into the fixing hole to be in threaded fit, the adjusting block can not rotate, the adjusting block is always located at a proper position, and the sealing groove is provided with a sealing ring to act on the inner wall of the cavity.

As a preferred embodiment of the flat valve system with non-penetrating piston according to the invention, the valve system comprises: the upper mounting cavity and the lower mounting cavity are provided with clamping grooves, the upper fixing piece and the lower fixing piece are provided with check rings matched with the clamping grooves, and the check rings can be embedded into the clamping grooves to prevent the loosening of the upper fixing piece and the lower fixing piece.

As a preferred embodiment of the flat valve system with non-penetrating piston according to the invention, the valve system comprises: the piston unit also comprises an upper pressure inlet and a lower pressure inlet which are arranged on the outer side wall, and an upper opening and a lower mounting opening which are arranged at the upper end and the lower end; the upper pressure inlet and the lower pressure inlet are respectively connected with a pressure source, and the piston body is pushed to move in the cavity by different pressures; one end of the indicating rod is connected with the piston body, and the other end of the indicating rod penetrates through the upper opening and is sealed through a sealing block; one end of the valve rod is connected with the piston body, and the other end of the valve rod penetrates through the lower mounting opening and then is connected with the valve plate.

As a preferred embodiment of the flat valve system with non-penetrating piston according to the invention, the valve system comprises: the flat valve further comprises a pipeline, a valve cavity and a valve seat; the valve cavity is communicated with the pipeline in a cross mode, the valve seat is arranged in the valve cavity, and the valve plate is arranged in the valve seat and driven by the valve rod up and down to open and close the valve seat.

As a preferred embodiment of the flat valve system with non-penetrating piston according to the invention, the valve system comprises: the valve cover unit also comprises an upper valve cover and a lower valve cover which are arranged at the upper end and the lower end of the valve cover unit; the upper end of the upper valve cover is provided with a mounting part, the mounting part is inserted into the lower mounting opening and is mounted through threaded fit, and the valve rod penetrates through the upper valve cover to be connected with the valve plate; the lower valve cover further comprises a tail cover connected with the bottom end of the flat valve, a tail cover nested in the tail cover and a tail rod arranged in the tail cover and the tail cover.

As a preferred embodiment of the flat valve system with non-penetrating piston according to the invention, the valve system comprises: the piston is characterized by further comprising a pressure unit, wherein the pressure unit is connected with the upper pressure inlet and the lower pressure inlet through an oil path to push the piston body to move up and down.

As a preferred embodiment of the flat valve system with non-penetrating piston according to the invention, the valve system comprises: the pressure unit comprises a pneumatic hydraulic pump system, a manual pump, an energy accumulator, a control valve and a plurality of pressure indicating instruments; generating a high pressure control fluid by the pneumatic hydraulic pump system and storing the high pressure control fluid in the accumulator; when the hydraulic valve needs to be opened or closed, the high-pressure control liquid from the energy accumulator can open or close a control object connected with the high-pressure control liquid through the control valve; and the manual pump can ensure the normal operation of the system under the condition of cutting off the air source.

As a preferred embodiment of the flat valve system with non-penetrating piston according to the invention, the valve system comprises: the pneumatic hydraulic pump system further comprises an oil atomizer, a pressure regulating valve, a pneumatic hydraulic pump assembly consisting of a pneumatic hydraulic pump, an overflow valve and a stop valve which are connected in sequence; the pneumatic hydraulic pump system is connected with an external air source, and the overflow valve can overflow rapidly, so that the safety of the system is ensured.

The invention has the beneficial effects that: firstly, the piston is designed to be solid, so that no leakage point exists, and the sealing performance is safe and reliable; secondly, a sealing groove is not required to be designed on the valve rod, the diameter of the valve rod can be properly increased, and the strength of the valve rod is improved; thirdly, the piston, the valve rod and the connecting device are prevented from loosening by the retainer ring; fourthly, the piston, the valve rod, the indicating rod, the adjusting nut, the fixing device and the connecting device are connected through threads, so that the structure is simple, and the installation and the disassembly are convenient; fifthly, the indication rod is fixed through the fixing device and the check ring, so that the indication rod is ensured not to fall off; sixthly, the stroke of the piston can be adjusted through an adjusting nut, so that the valve switch is ensured to be in place; and seventhly, two independent power sources are arranged, so that the normal operation of the system can be ensured even if the air source is disconnected, and the overflow valve can overflow rapidly, and the safety of the system is ensured.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. Wherein:

FIG. 1 is a schematic view of the overall structure of a flat valve system with non-penetrating pistons according to a first embodiment of the present invention;

FIG. 2 is a schematic view of a piston body of a flat valve system with a non-penetrating piston according to a second embodiment of the present invention;

FIG. 3 is a schematic view of an exploded view of a piston body of a flat valve system with a non-penetrating piston according to a second embodiment of the present invention;

FIG. 4 is a schematic view showing the overall structure of a piston unit in a flat valve system with non-penetrating pistons according to a second embodiment of the present invention;

FIG. 5 is a schematic view showing the connection of a pressure unit to a piston unit in a flat valve system with a non-penetrating piston according to a third embodiment of the present invention;

FIG. 6 is a schematic diagram of a pressure unit in a flat valve system with non-penetrating pistons according to a third embodiment of the present invention;

FIG. 7 is a schematic view showing the overall structure of a safety shield in a flat valve system with a non-penetrating piston according to a fourth embodiment of the present invention;

fig. 8 is a schematic cross-sectional view of a safety shield in a flat valve system with a non-penetrating piston according to a fourth embodiment of the present invention.

Detailed Description

So that the manner in which the above recited objects, features and advantages of the present invention can be understood in detail, a more particular description of the invention, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways other than those described herein, and persons skilled in the art will readily appreciate that the present invention is not limited to the specific embodiments disclosed below.

Further, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic can be included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.

Further, in describing the embodiments of the present invention in detail, the cross-sectional view of the device structure is not partially enlarged to a general scale for convenience of description, and the schematic is only an example, which should not limit the scope of protection of the present invention. In addition, the three-dimensional dimensions of length, width and depth should be included in actual fabrication.

Also in the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper, lower, inner and outer", etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first, second, or third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The terms "mounted, connected, and coupled" should be construed broadly in this disclosure unless otherwise specifically indicated and defined, such as: can be fixed connection, detachable connection or integral connection; it may also be a mechanical connection, an electrical connection, or a direct connection, or may be indirectly connected through an intermediate medium, or may be a communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

Example 1

As shown in fig. 1, a schematic diagram of the overall structure of the flat valve system with non-penetrating piston of the present embodiment is shown, including a flat valve 100, a piston unit 200, and a valve cover unit 300. Specifically, the system includes a flat valve 100, a piston unit 200 driving the flat valve 100 to be opened or closed and provided at an upper end thereof, and a valve cover unit 300 for closing the flat valve 100 and provided at both ends thereof. Further, the flat valve 100 is a sliding valve with parallel shutters as a closing member, which may be a single shutter or a double shutter with a spreader mechanism therebetween, the pressing force of the shutters to the valve seat is controlled by the pressure of the medium acting on the floating shutter or the floating valve seat, and if it is a double shutter flat gate valve, the spreader mechanism between the two shutters can supplement the pressing force, and the flat gate valve may be classified into a manual flat gate valve, a pneumatic flat gate valve and an electric flat gate valve in a driving manner. In this embodiment, the piston unit 200 is a single valve plate, and drives the flat valve 100 to open or close, because the piston unit 200 adopts hydraulic pressure as power, the rubber material is used as much as possible, after all, the rubber material is aged after the service time is long, so that the sealing leakage is caused, and a certain potential safety hazard exists. It should be noted that, the piston body 202 can slide up and down in the cavity 201, and the pressure in the cavity 201 is increased by injecting hydraulic pressure into one end of the cavity 201, so as to push the piston body 202 to move toward the end with smaller pressure, and vice versa, and the valve cover unit 300 is shown in the figure and is mounted at two ends of the flat valve 100 in a bolt-fixing manner.

Further, in the present embodiment, the flat valve 100 further includes a pipe 102, a valve cavity 103, and a valve seat 104; the valve cavity 103 is communicated with the pipeline 102 in a cross manner, the valve seat 104 is arranged in the valve cavity 103, the valve plate 101 is arranged in the valve seat 104 and driven up and down by the valve rod 203, the valve seat 104 is opened and closed, and the valve cover unit 300 further comprises an upper valve cover 301 and a lower valve cover 302 which are arranged at the upper end and the lower end of the valve cover unit; the upper end of the upper valve cover 301 is provided with a mounting part 301a, the mounting part 301a is inserted into the lower mounting opening 208 to be mounted through screw thread fit, and the valve rod 203 passes through the upper valve cover 301 to be connected with the valve plate 101; lower deck lid 302 also includes a tail cap 302a attached to the bottom end of flat valve 100, a tail cap 302b nested within tail cap 302a, and a tail stem 302c positioned within tail cap 302a and tail cap 302 b. The purpose of the tail rod 302c is to balance the force of the valve plate 101 in the case of pressure in the valve chamber 103, so as to ensure the valve to be in a fully opened or fully closed state and prevent the valve plate from being moved upwards due to the pressure of the medium.

Example 2

Referring to the illustrations of fig. 2 to 4, in order to achieve a more stable connection of the piston and the valve stem member in the present embodiment, loosening in the up-down direction is less likely to occur, unlike the first embodiment in that: the piston body 202 further includes upper and lower mounting cavities 202a and 202b, which are provided at upper and lower ends thereof without penetration, and upper and lower fixing members 202c and 202d, which are respectively matched with the cavity profiles thereof. Specifically, the system includes a flat valve 100, a piston unit 200 driving the flat valve 100 to be opened or closed and provided at an upper end thereof, and a valve cover unit 300 for closing the flat valve 100 and provided at both ends thereof. Further, the flat valve 100 is a sliding valve with parallel shutters as a closing member, which may be a single shutter or a double shutter with a spreader mechanism therebetween, the pressing force of the shutters to the valve seat is controlled by the pressure of the medium acting on the floating shutter or the floating valve seat, and if it is a double shutter flat gate valve, the spreader mechanism between the two shutters can supplement the pressing force, and the flat gate valve may be classified into a manual flat gate valve, a pneumatic flat gate valve and an electric flat gate valve in a driving manner. In this embodiment, the piston unit 200 is a single valve plate, and drives the flat valve 100 to open or close, because the piston unit 200 adopts hydraulic pressure as power, the rubber material is used as much as possible, after all, the rubber material is aged after the service time is long, so that the sealing leakage is caused, and a certain potential safety hazard exists. It should be noted that, the piston body 202 can slide up and down in the cavity 201, and the pressure in the cavity 201 is increased by injecting hydraulic pressure into one end of the cavity 201, so as to push the piston body 202 to move toward the end with smaller pressure, and vice versa, and the valve cover unit 300 is shown in the figure and is mounted at two ends of the flat valve 100 in a bolt-fixing manner. Further, in the present embodiment, the flat valve 100 further includes a pipe 102, a valve cavity 103, and a valve seat 104; the valve cavity 103 is communicated with the pipeline 102 in a cross manner, the valve seat 104 is arranged in the valve cavity 103, the valve plate 101 is arranged in the valve seat 104 and driven up and down by the valve rod 203, the valve seat 104 is opened and closed, and the valve cover unit 300 further comprises an upper valve cover 301 and a lower valve cover 302 which are arranged at the upper end and the lower end of the valve cover unit; the upper end of the upper valve cover 301 is provided with a mounting part 301a, the mounting part 301a is inserted into the lower mounting opening 208 to be mounted through screw thread fit, and the valve rod 203 passes through the upper valve cover 301 to be connected with the valve plate 101; lower deck lid 302 also includes a tail cap 302a attached to the bottom end of flat valve 100, a tail cap 302b nested within tail cap 302a, and a tail stem 302c positioned within tail cap 302a and tail cap 302 b. The purpose of the tail rod 302c is to balance the force of the valve plate 101 under the condition that the valve cavity 103 has pressure, so that the valve plate is in a fully opened or fully closed state, and the valve plate is prevented from moving upwards due to the pressure of the medium.

Further, the indicating rod 204 penetrates through the upper fixing member 202c, and the part of the indicating rod extending from the tail end is provided with an upper limiting part 204a, the upper fixing member 202c can be embedded into the upper mounting cavity 202a, and the indicating rod is propped against the bottom of the upper mounting cavity 202a through the upper limiting part 204 a; the valve rod 203 penetrates through the lower fixing member 202d and is limited at the tail end by the lower limiting portion 203a, and the lower fixing member 202d can be embedded into the lower mounting cavity 202b and abuts against the top of the lower mounting cavity 202b through the lower limiting portion 203 a. It should be noted that, when the outline formed by the two indicating rods 204 after penetrating through the upper fixing member 202c is adapted to the inner cavity space of the upper mounting cavity 202a, and the inner cavity space is in a three-stage step structure with gradually decreasing inner diameter, each step is in contact with the upper fixing member 202c, and the upper fixing member 202c and the upper mounting cavity 202a are mounted by threaded fit, i.e. the upper fixing member 202c and the upper mounting cavity 202a have male and female nuts respectively or vice versa, and the same applies to the lower fixing member 202 d.

Further, in order to prevent the upper fixing member 202c and the lower fixing member 202d from loosening after being respectively inserted into the upper mounting cavity 202a and the lower mounting cavity 202b, in this embodiment, the inner side walls of the upper mounting cavity 202a and the lower mounting cavity 202b are provided with the clamping grooves 202i, the upper fixing member 202c and the lower fixing member 202d are provided with the retainer rings 202d-1 which are matched with the clamping grooves 202i, and the retainer rings 202d-1 can be inserted into the clamping grooves 202i to prevent the upper fixing member 202c and the lower fixing member 202d from loosening. It should be noted that, after the retainer 202d-1 has a certain elasticity and the rotating upper fixing member 202c is installed in the upper installation cavity 202a and is in place, the retainer 202d-1 can be first retracted into the upper installation cavity 202a by using pliers, and it is obvious to those skilled in the art that, of course, the retainer 202d-1 can be first retracted into the upper fixing member 202c by using pliers, and then the rotating upper fixing member 202c is installed in the upper installation cavity 202a, when the retainer 202d-1 enters the upper installation cavity 202a to be blocked, the pliers are released again, and the retainer 202d-1 is deformed to be blocked in the blocking groove 202i due to the elasticity.

Further, in this embodiment, the piston body 202 further includes fixing holes 202e, locking pin members 202f, adjusting blocks 202g and sealing grooves 202h disposed on both sides; the adjusting block 202g is connected with the piston body 202 through threads, the adjusting block 202g is rotated to enable the adjusting block 202g to move up and down, when the adjusting block 202g is located at a proper position, the adjusting block 202g is penetrated through the adjusting block 202g by using a clamping pin member 202f, the extending part of the adjusting block can be inserted into a fixing hole 202e to be matched with threads, the adjusting block 202g cannot rotate and is always located at a proper position, and the adjusting block 202g is connected with the piston body 202 through threads, and is an annular block, which is sleeved on the piston body 202, and the contacted part of the adjusting block 202g and the piston body is provided with a mutually matched threaded structure. And seal groove 202h sets up the effect of sealing washer and cavity 201 inner wall and prevents the leakage of hydraulic oil.

Still further, the present embodiment is also different from the previous embodiment in that: the piston unit 200 further includes an upper pressure inlet 205, a lower pressure inlet 206, and an upper opening 207 and a lower mounting opening 208 provided at upper and lower ends; the upper pressure inlet 205 and the lower pressure inlet 206 are respectively connected with a pressure source, and the piston body 202 is pushed to move in the cavity 201 by different pressures; one end of the indication rod 204 is connected with the piston body 202, and the other end passes through the upper opening 207 and is sealed by the sealing block 207a to prevent leakage; the valve rod 203 has one end connected to the piston body 202 and the other end connected to the valve plate 101 after passing through the lower mounting port 208, and the valve rod 203 is sealed in the lower mounting port 208 by the same sealing structure as the sealing block 207 a. It should be noted that, the mounting portion 301a is inserted into the lower mounting opening 208 and is mounted by threaded fit, and the threaded mounting manner is also adopted, which can be realized by referring to the prior art, and the upper pressure inlet 205, the lower pressure inlet 206 and the external pressure source are connected, and the cavity 201 is divided into an upper cavity and a lower cavity by the piston body 202, the upper pressure inlet 205 is communicated with the upper cavity, the lower pressure inlet 206 is communicated with the lower cavity, and when the pressure in the upper cavity is inconsistent with the pressure in the lower cavity, the piston body 202 is driven to move towards the end with smaller pressure, so that the movement of driving the valve rod is realized.

Example 3

Referring to fig. 5 to 6, the present embodiment adopts a hydraulic driving manner, so, unlike the above embodiment, a pressure unit 400 connected to a piston is further provided, where the pressure unit 400 is connected to the upper pressure inlet 205 and the lower pressure inlet 206 through an oil path, so as to push the piston body 202 to move up and down, and the oil path may be, for example, a pressure-resistant rubber hose line with a path sandwiching a layer of steel wire, and the length may be selected by a user. Specifically, the system includes a flat valve 100, a piston unit 200 driving the flat valve 100 to be opened or closed and provided at an upper end thereof, and a valve cover unit 300 for closing the flat valve 100 and provided at both ends thereof. Further, the flat valve 100 is a sliding valve with parallel shutters as a closing member, which may be a single shutter or a double shutter with a spreader mechanism therebetween, the pressing force of the shutters to the valve seat is controlled by the pressure of the medium acting on the floating shutter or the floating valve seat, and if it is a double shutter flat gate valve, the spreader mechanism between the two shutters can supplement the pressing force, and the flat gate valve may be classified into a manual flat gate valve, a pneumatic flat gate valve and an electric flat gate valve in a driving manner. In this embodiment, the piston unit 200 is a single valve plate, and drives the flat valve 100 to open or close, because the piston unit 200 adopts hydraulic pressure as power, the rubber material is used as much as possible, after all, the rubber material is aged after the service time is long, so that the sealing leakage is caused, and a certain potential safety hazard exists. It should be noted that, the piston body 202 can slide up and down in the cavity 201, and the pressure in the cavity 201 is increased by injecting hydraulic pressure into one end of the cavity 201, so as to push the piston body 202 to move toward the end with smaller pressure, and vice versa, and the valve cover unit 300 is shown in the figure and is mounted at two ends of the flat valve 100 in a bolt-fixing manner. Further, in the present embodiment, the flat valve 100 further includes a pipe 102, a valve cavity 103, and a valve seat 104; the valve cavity 103 is communicated with the pipeline 102 in a cross manner, the valve seat 104 is arranged in the valve cavity 103, the valve plate 101 is arranged in the valve seat 104 and driven up and down by the valve rod 203, the valve seat 104 is opened and closed, and the valve cover unit 300 further comprises an upper valve cover 301 and a lower valve cover 302 which are arranged at the upper end and the lower end of the valve cover unit; the upper end of the upper valve cover 301 is provided with a mounting part 301a, the mounting part 301a is inserted into the lower mounting opening 208 to be mounted through screw thread fit, and the valve rod 203 passes through the upper valve cover 301 to be connected with the valve plate 101; lower deck lid 302 also includes a tail cap 302a attached to the bottom end of flat valve 100, a tail cap 302b nested within tail cap 302a, and a tail stem 302c positioned within tail cap 302a and tail cap 302 b. The purpose of the tail rod 302c is to balance the force of the valve plate 101 in the case of pressure in the valve chamber 103, so as to ensure the valve to be in a fully opened or fully closed state and prevent the valve plate from being moved upwards due to the pressure of the medium.

Further, in this embodiment, the piston body 202 further includes fixing holes 202e, locking pin members 202f, adjusting blocks 202g and sealing grooves 202h disposed on both sides; the adjusting block 202g is connected with the piston body 202 through threads, the adjusting block 202g is rotated to enable the adjusting block 202g to move up and down, when the adjusting block 202g is located at a proper position, the adjusting block 202g is penetrated by the clamping pin piece 202f, the extending part of the adjusting block can be inserted into the fixing hole 202e to be matched with the threads, the adjusting block 202g can not rotate, the adjusting block 202g is always located at a proper position, the adjusting block 202g is rotated to enable the piston stroke to be shortened or lengthened, the movement stroke of the piston is finely adjusted, and finally the purpose is to enable the center of a valve plate hole to be aligned with the center of a valve body channel, so that the drift diameter gauge can pass through a valve. And seal groove 202h sets up the effect of sealing washer and cavity 201 inner wall and prevents the leakage of hydraulic oil.

Still further, the present embodiment is also different from the previous embodiment in that: the piston unit 200 further includes an upper pressure inlet 205, a lower pressure inlet 206, and an upper opening 207 and a lower mounting opening 208 provided at upper and lower ends; the upper pressure inlet 205 and the lower pressure inlet 206 are respectively connected with a pressure source, and the piston body 202 is pushed to move in the cavity 201 by different pressures; one end of the indication rod 204 is connected with the piston body 202, and the other end passes through the upper opening 207 and is sealed by the sealing block 207a to prevent leakage; one end of the valve rod 203 is connected to the piston body 202, and the other end is connected to the valve plate 101 after passing through the lower mounting port 208. It should be noted that, the mounting portion 301a is inserted into the lower mounting opening 208 and is mounted by threaded fit, and the threaded mounting manner is also adopted, which can be realized by referring to the prior art, and the upper pressure inlet 205, the lower pressure inlet 206 and the external pressure source are connected, and the cavity 201 is divided into an upper cavity and a lower cavity by the piston body 202, the upper pressure inlet 205 is communicated with the upper cavity, the lower pressure inlet 206 is communicated with the lower cavity, and when the pressure in the upper cavity is inconsistent with the pressure in the lower cavity, the piston body 202 is driven to move towards the end with smaller pressure, so that the movement of driving the valve rod is realized.

The pressure unit 400 in this embodiment includes a pneumatic hydraulic pump system, a manual pump, an accumulator, a control valve, and a plurality of pressure indicators (including a gas source meter, a barometer, and an oil pressure meter); the opening and closing pipelines of the control valve are respectively connected with the upper pressure inlet 205 and the lower pressure inlet 206 through oil pipelines, and different pressures are injected to realize the driving control of the piston body 202. Generating high-pressure control liquid by a pneumatic hydraulic pump system and storing the high-pressure control liquid in an energy accumulator; when the hydraulic valve needs to be opened or closed, the high-pressure control liquid from the energy accumulator can be used for opening or closing a control object connected with the high-pressure control liquid through the control valve; the manual pump can ensure the normal operation of the system under the condition of cutting off the air source; the pneumatic hydraulic pump system also comprises an oil atomizer, a pressure regulating valve, a pneumatic hydraulic pump assembly consisting of a pneumatic hydraulic pump, an overflow valve and a stop valve which are connected in sequence; the pneumatic hydraulic pump system is connected with an external air source, and the overflow valve can overflow rapidly, so that the safety of the system is ensured.

It should be further noted that, referring to the drawings, the control object of this embodiment includes three control objects, all connected to the control valve, where the oil mist device is an existing device, in the pneumatic fluid transmission system, the power is transmitted and controlled by the compressed air in the closed loop, where the air medium needs to be lubricated, the oil mist device is a device designed to add the required lubricant into the air flow, and is a special oil injection device, which atomizes the lubricant and injects the lubricant into the air flow, and flows into the part that needs to be lubricated along with the compressed air, so as to achieve the purpose of lubrication. The pressure regulating valve, the overflow valve and the stop valve can all adopt existing valves. A manual pump is also a manually operated pump, for example, a one-way manual oil pump is a small hydraulic pump station which converts manual mechanical energy into hydraulic energy. Control valves are also known to consist of two main assemblies: valve body assemblies and actuator assemblies (or actuator systems) are divided into four major families: the single-seat series control valve, the double-seat series control valve, the sleeve series control valve and the self-operated series control valve can control the on-off of the pipeline.

Example 4

As shown in fig. 7 to 8, referring to the above embodiment, an upper opening 207 is provided above the piston unit 200, and one end of the indication rod 204 is connected to the piston body 202, and the other end thereof slides up and down through the upper opening 207, and when the piston operates, since the upper opening 207 is exposed to the air, a large amount of dust particles in the air in a severe environment can fall into the upper opening 207, so that the movement abrasion of the indication rod 204 and the upper opening 207 is increased due to the dust falling into the relative movement gap therebetween, and even if the lubricant is added, a certain amount of particle abrasion is also provided, which seriously affects the use effect and the service life of the piston. Therefore, in order to effectively reduce abrasion caused by dust falling down at the upper opening 207, the present embodiment is different from the above-described embodiment in that: the safety shield 500 is arranged above the upper opening 207, the safety shield 500 is used for dust prevention of the upper opening 207, and the indication rod 204 is exposed to the outside to continuously make telescopic movement, so that a certain safety threat is provided for an external operator, the safety shield 500 also has a safety protection effect for the indication rod 204, and it is also required to be explained here that the installation mode between the safety shield 500 and the upper opening 207 is realized by adopting the prior art, for example, the bottom of the safety shield 500 is provided with a groove with an inward opening and a female thread on the inner surface, and meanwhile, an upward protruding extension part of the upper opening 207 is exactly correspondingly inserted into the groove with the female thread, and the male thread is arranged on the outer side wall of the upper opening 207 to be matched with the groove with the female thread, so that the installation between the two can be realized when the safety shield 500 is rotated onto the upper opening 207; for example, after the safety shield 500 is directly sleeved on the upper opening 207, bolts are disposed around the bottom surface of the safety shield 500, and the bottom surface of the safety shield 500 and the upper top surface of the piston unit 200 that are in contact with each other are mounted and connected by the bolts, and the above mounting manner can be completely implemented by those skilled in the art in combination with the prior art, so this portion of this embodiment is not illustrated in the drawings.

Further, the safety protection cover 500 further comprises a cover body 501, a linkage assembly 502 arranged in the cover body 501 and a turnover assembly 503 connected with the linkage assembly 502 and arranged on the outer side of the cover body 501, the linkage assembly 502 is connected with the indicating rod 204, the indicating rod 204 moves up and down along with the piston body 202, so that the linkage assembly 502 is driven to be linked, the left side end of the linkage assembly 502 is abutted against the turnover assembly 503, the turnover assembly 503 is abutted against and turned over along with the movement of the piston, and the safety protection cover can be further used for indicating the movement stroke of the piston.

More specifically, the cover 501 is cylindrical, the side wall of the cover is provided with an extending groove 501a, a shielding plate 501b is arranged above the extending groove 501a, the shielding plate 501b is limited by a longitudinal guide rail 501b-1 arranged on the inner wall of the cover 501, the longitudinal guide rail 501b-1 is an L-shaped shielding plate which can slide longitudinally in the guide rail, and the transverse width of the shielding plate 501b is larger than the transverse notch width of the extending groove 501a, so that when the shielding plate 501b descends, the corresponding part of the notch of the extending groove 501a can be shielded, and dust can be effectively reduced from entering the cover 501 from the extending groove 501 a; and a support plate 501c extending along the lower direction of the extending groove 501a and used for supporting the linkage assembly 502, where the linkage assembly 502 includes a docking rod 502a, a lifting plate 502b, a first linkage rod 502c, a second linkage rod 502d and a collision roller 502e, it should be noted that, after the docking rod 502a is inserted into the indicating rod 204 and is installed in a threaded manner, the docking rod 502a can move up and down synchronously with the indicating rod 204, the installation manner refers to the installation between the safety shield 500 and the upper opening 207, and it is easy to find out by those skilled in the art that, when the safety shield 500 is inserted into the upper opening 207 for rotation installation, the docking rod 502a can be inserted into the indicating rod 204 for synchronous rotation installation, and of course, after the safety shield 500 is inserted into the upper opening 207 for a certain distance, the docking rod 502a and the indicating rod 204 can be inserted into the upper opening 204 for screw-thread engagement or synchronization can be achieved by setting up and down different modes. Further, the top end of the docking rod 502a is connected to the lifting plate 502b, so that the indication rod 204, the docking rod 502a and the lifting plate 502b can keep synchronous up-and-down movement; one end of the first linkage rod 502c is hinged to the lifting plate 502b through the first shaft seat 502c, the other end of the first linkage rod 502c is hinged to one end of the second linkage rod 502d through the abutting roller 502e, and the other end of the second linkage rod 502d is hinged to the supporting plate 501c through the second shaft seat 502d-1, so that when the indicating rod 204, the abutting rod 502a and the lifting plate 502b synchronously press downwards, the abutting roller 502e is pressed to extend out of the extending groove 501a and abut against the inner wall of the overturning assembly 503, the continuously pressing downwards process always abuts against the overturning assembly 503 outwards, and when the same is moved upwards, the abutting roller 502e stretches inwards, and the overturning assembly 503 cannot receive outwards abutting force. Further, the turnover assembly 503 includes a torsion spring rotating shaft 503a disposed at the bottom, and it should be noted that the torsion spring rotating shaft 503a adopts a rotating shaft with a torsion force of a spring in the prior art, and in this embodiment, when the abutting roller 502e retracts inward, a restoring force is generated by the torsion spring rotating shaft 503a to make the turnover assembly 503 have a tendency to rotate inward.

In the initial state of the embodiment, when the valve is in the open state, the piston body 202 is located above the cavity 201, and it should be noted that the valve opening includes two states of being completely opened or not completely opened, and obviously, the indication rod 204 is at the most distal end in the upward movement direction when completely opened, and it is not easy to understand that the indication rod is in the half way when not completely opened, so when the valve is completely opened, the corresponding turnover assembly 503 is in the vertical state, the spring of the torsion spring rotating shaft 503a is in the state of not deforming, and in order for an operator to know the state at a glance, the indication mark, for example, the "open" character adopted in the embodiment is arranged on the outer side wall of the turnover assembly 503.

Further, when the piston body 202 moves gradually downwards and corresponds to the gradual closing of the flat valve 100, and simultaneously the downward movement of the piston body 202 drives the downward movement of the indication rod 204, the butt joint rod 502a and the lifting plate 502b, the abutting roller 502e is pressed downwards, due to the hinged arrangement of all the fulcrums of the linkage assembly 502, the abutting roller 502e is abutted to the inner wall of the overturning assembly 503 from the extension of the extension groove 501a, the abutting roller is overturned downwards by taking the torsion spring rotating shaft 503a as the fulcrums, the included angle formed by the overturning assembly 503 and the cover body 501 is continuously increased, the spring in the torsion spring rotating shaft 503a is deformed, the overturning assembly 503 has a rotating trend, and when the first linkage rod 502c descends, the space above the first linkage rod 502c is enlarged, and the shielding plate 501b descends under the action of gravity to shield the part of the extension groove 501 a. Conversely, when the valve is in a closed to open demand, the indicator stem 204 moves upward, turning the rotational trend of the assembly 503 until it is fully open. Similarly, when the first link lever 502c is raised, the shielding plate 501b is pressed upward against it, so that the shielding plate 501b is raised, and the amount of dust particles in the drop housing 501 is appropriately reduced. According to the above-mentioned technical personnel, it is easy to find that in this embodiment, the opening degree of the valve plate of the flat valve 100 can be indicated by the angle formed by the turning component 503 and the cover 501 corresponding to the ascending or descending distance of the indication rod 204, for example, the simplest angle formed by the turning component 503 being 0 when the valve is completely opened is vertical, and the indication rod 204 being at the far-end of the upward movement, so that the characteristic value of half of the valve opening is vertical and the characteristic value of half of the valve opening is completely closed, and similarly, the same can be found by half of the value, and by pushing the value, the actual requirement of the user on the opening degree of the valve can be calculated and the indication of the specific value or the approximate indication can be carried out.

It should be noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present invention may be modified or substituted without departing from the spirit and scope of the technical solution of the present invention, which is intended to be covered in the scope of the claims of the present invention.

Claims

1. A flat valve system having a non-penetrating piston, characterized by: comprises a flat valve (100), a piston unit (200) which drives the flat valve (100) to open or close and is arranged at the upper end of the flat valve, and a valve cover unit (300) which is used for sealing the flat valve (100) and is arranged at the two ends of the flat valve;

the piston unit (200) further comprises a cavity (201) with a sliding space, a piston body (202) and a valve rod (203), wherein the piston body (202) is arranged in the cavity (201) and is of an integrated solid structure, the upper end of the valve rod (203) is connected with the piston body (202), and the lower end of the valve rod is connected with a valve plate (101) arranged in the flat valve (100);

the piston body (202) further comprises an upper mounting cavity (202 a) and a lower mounting cavity (202 b) which are arranged at the upper end and the lower end in a non-penetrating way, and an upper fixing piece (202 c) and a lower fixing piece (202 d) which are matched with the outlines of the upper mounting cavity and the lower mounting cavity respectively;

The indicating rod (204) penetrates through the upper fixing piece (202 c) and an upper limiting part (204 a) is arranged at the part, extending out of the tail end of the indicating rod, of the upper fixing piece (202 c), the upper fixing piece (202 c) can be embedded into the upper mounting cavity (202 a), and the indicating rod is abutted against the bottom of the upper mounting cavity (202 a) through the upper limiting part (204 a);

the valve rod (203) penetrates through the lower fixing piece (202 d) and the tail end of the valve rod is limited by the lower limiting part (203 a), the lower fixing piece (202 d) can be embedded into the lower mounting cavity (202 b), and the valve rod is propped against the top of the lower mounting cavity (202 b) through the lower limiting part (203 a);

the piston body (202) further comprises fixing holes (202 e), clamping pin pieces (202 f), adjusting blocks (202 g) and sealing grooves (202 h) which are arranged on two sides;

the adjusting block (202 g) is connected with the piston body (202) through threads, the adjusting block (202 g) is rotated to enable the adjusting block to move up and down, when the adjusting block (202 g) is located at a proper position, the adjusting block (202 g) is penetrated by the clamping pin piece (202 f), the extending part of the adjusting block can be inserted into the fixing hole (202 e) in a threaded fit mode, so that the adjusting block (202 g) can not rotate, the sealing groove (202 h) is always located at the proper position, and the sealing ring is arranged to act with the inner wall of the cavity (201);

Clamping grooves (202 i) are formed in the inner side walls of the upper mounting cavity (202 a) and the lower mounting cavity (202 b), check rings (202 d-1) matched with the clamping grooves (202 i) are arranged on the upper fixing piece (202 c) and the lower fixing piece (202 d), and the check rings (202 d-1) can be embedded into the clamping grooves (202 i) to prevent the upper fixing piece (202 c) and the lower fixing piece (202 d) from loosening;

the piston unit (200) further comprises an upper pressure inlet (205) and a lower pressure inlet (206) which are arranged on the outer side wall, and an upper opening (207) and a lower mounting opening (208) which are arranged on the upper end and the lower end;

the upper pressure inlet (205) and the lower pressure inlet (206) are respectively connected with a pressure source, and the piston body (202) is pushed to move in the cavity (201) by different pressures; one end of the indicating rod (204) is connected with the piston body (202), and the other end of the indicating rod passes through the upper opening (207) and is sealed by a sealing block (207 a); one end of the valve rod (203) is connected with the piston body (202), and the other end of the valve rod passes through the lower mounting port (208) and then is connected with the valve plate (101).

2. A flat valve system with non-penetrating piston according to claim 1, wherein: the flat valve (100) further comprises a pipeline (102), a valve cavity (103) and a valve seat (104);

The valve cavity (103) is communicated with the pipeline (102) in a cross mode, the valve seat (104) is arranged in the valve cavity (103), the valve plate (101) is arranged in the valve seat (104) and driven by the valve rod (203) up and down, and opening and closing of the valve seat (104) are achieved.

3. A flat valve system with non-penetrating piston according to claim 2, wherein: the valve cover unit (300) further comprises an upper valve cover (301) and a lower valve cover (302) which are arranged at the upper end and the lower end of the valve cover unit;

the upper end of the upper valve cover (301) is provided with a mounting part (301 a), the mounting part (301 a) is inserted into the lower mounting opening (208) and is mounted through threaded fit, and the valve rod (203) passes through the upper valve cover (301) to be connected with the valve plate (101);

the lower valve cover (302) further comprises a tail cover (302 a) connected with the bottom end of the flat valve (100), a tail cover (302 b) nested in the tail cover (302 a) and a tail rod (302 c) arranged in the tail cover (302 a) and the tail cover (302 b).

4. A flat valve system with non-penetrating piston according to claim 3, wherein: the piston comprises a piston body (202) and is characterized by further comprising a pressure unit (400), wherein the pressure unit (400) is connected with the upper pressure inlet (205) and the lower pressure inlet (206) through an oil path route to push the piston body (202) to move up and down.

5. A flat valve system with non-penetrating piston according to claim 4, wherein: the pressure unit (400) comprises a pneumatic hydraulic pump system, a manual pump, an energy accumulator, a control valve and a plurality of pressure indicating instruments;

generating a high pressure control fluid by the pneumatic hydraulic pump system and storing the high pressure control fluid in the accumulator;

when the hydraulic valve needs to be opened or closed, the high-pressure control liquid from the energy accumulator can open or close a control object connected with the high-pressure control liquid through the control valve; and the manual pump can ensure the normal operation of the system under the condition of cutting off the air source.

6. A flat valve system with non-penetrating piston according to claim 5, wherein: the pneumatic hydraulic pump system further comprises an oil atomizer, a pressure regulating valve, a pneumatic hydraulic pump assembly consisting of a pneumatic hydraulic pump, an overflow valve and a stop valve which are connected in sequence; the pneumatic hydraulic pump system is connected with an external air source, and the overflow valve can overflow rapidly, so that the safety of the system is ensured.