CN211039768U - Valve and valve system - Google Patents

Abstract

The present application discloses a valve and a valve system. The valve includes a housing, a valve core, and a diaphragm. The housing has an inlet and an outlet. The valve spool is disposed in the housing. The diaphragm is cylindrical, the diaphragm is arranged in the shell and surrounds the valve core, two ends of the diaphragm are connected to the shell, so that an annular control chamber is formed between the diaphragm and the shell, and the diaphragm can move towards the valve core and away from the valve core, so that the inner side of the diaphragm can abut against and leave the valve core. The valve has the advantages of small overall dimension, simple structure, good sealing performance and high reliability.

Description

Valve and valve system

Technical Field

The present application relates to a valve and valve system, and more particularly, to a valve having a diaphragm and a system using the same.

Background

Generally, a valve includes a diaphragm, a driving rod, a control chamber, a valve core and a valve seat, wherein the driving rod is used for driving the diaphragm and the valve core to move, so that the valve is opened and closed. The control chamber and the flow passage of the valve are partitioned into upper and lower or left and right spaces by the diaphragm, and thus, there is a need for a valve and a valve system having a simpler and more compact structure.

SUMMERY OF THE UTILITY MODEL

Exemplary embodiments of the present application may address at least some of the above-mentioned issues. For example, according to a first aspect of the present application, there is provided a valve comprising:

a housing having an inlet and an outlet;

a valve spool disposed in the housing; and

the diaphragm is cylindrical, the diaphragm is arranged in the shell and surrounds the valve core, two ends of the diaphragm are connected to the shell, so that an annular control chamber is formed between the diaphragm and the shell, and the diaphragm can move towards the valve core and away from the valve core, so that the inner side of the diaphragm can abut against and leave the valve core.

According to the valve of the first aspect described above, in a state where the inner side of the diaphragm is apart from the valve element, an annular communication passage is formed between the inner side of the diaphragm and the valve element.

The valve according to the first aspect described above, wherein the inlet and the outlet form a closable and communicable fluid passage therebetween; wherein when a pressure of the inlet is greater than or equal to a preset value than a pressure in the control chamber, an inner side of the diaphragm is able to move away from the spool, thereby communicating the fluid passage; wherein when a pressure of the inlet is less than a preset value than a pressure in the control chamber, an inner side of the diaphragm is capable of abutting against the spool, thereby closing the fluid passage.

According to the valve of the first aspect, the housing is provided with a control chamber communication port, and the control chamber communication port communicates with the control chamber.

According to the valve of the first aspect, the valve body has a disk shape.

According to the valve of the first aspect, the diaphragm includes an inner layer film, an intermediate layer film, and an outer layer film, the inner layer film, the intermediate layer film, and the outer layer film are all cylindrical, the inner layer film is disposed inside the intermediate layer film, and the outer layer film is disposed outside the intermediate layer film; wherein the inner layer film and the outer layer film are made of rubber, and the middle layer film is made of canvas.

According to the valve of the first aspect, a portion of the diaphragm located between the inlet and the valve element has a truncated cone shape.

According to the valve of the first aspect, a portion of the diaphragm located between the outlet and the valve element has a truncated cone shape.

The valve according to the first aspect above, wherein the housing comprises an inlet end cap, an outlet end cap and a housing body; wherein the housing body is disposed between the inlet end cap and the outlet end cap, one end of the diaphragm is clamped between the inlet end cap and the housing body, and the other end of the diaphragm is clamped between the outlet end cap and the housing body; wherein the housing body is disposed around the diaphragm to form the control chamber between the housing body and the diaphragm.

The valve according to the first aspect described above, further comprising a spool holder disposed inside the housing and connected to the inlet end cap and the outlet end cap; wherein the valve cartridge is supported in the diaphragm by the cartridge holder.

The valve spool support includes a first support and a second support connected to the inlet end cap and the outlet end cap, respectively; the valve further includes a spool connector, the spool being clamped between the first bracket and the second bracket and connected to the first bracket and the second bracket by the spool connector.

The valve according to the first aspect, wherein the inlet end cap is provided with an end cap opening, the end cap opening being in fluid communication with the inlet of the valve.

According to a second aspect of the present application, there is provided a valve system comprising a valve according to the first aspect of the present application; the shell is provided with a control chamber communication port, and the control chamber communication port is communicated with the control chamber; and

and the adjusting device is connected with the control chamber communication port and is used for adjusting the pressure of the control chamber by controlling the fluid in the control chamber.

According to the valve system of the second aspect described above, the valve system further comprises control means arranged to be able to control the opening and closing of the regulating means.

In the valve system according to the second aspect, the housing is provided with an end cap opening, the end cap opening being in fluid communication with the inlet of the valve; the regulating device has a regulating device inlet and a regulating device outlet; the opening of the end cover is connected with the inlet of the adjusting device, and the communication port of the control chamber is connected with the inlet of the adjusting device; wherein when the regulating means is open fluid in the control chamber is able to flow out through the regulating means outlet and when the regulating means is closed fluid at the inlet of the valve is able to flow into the control chamber.

The valve has the advantages of small overall dimension, simple structure, good sealing performance and high reliability. The valve can respond to the pressure change in the pipeline in the valve system rapidly in the operation of the valve system, and the stability is high.

Drawings

These and other features and advantages of the present application may be better understood by reading the following detailed description with reference to the drawings, in which like characters represent like parts throughout the drawings, wherein:

FIG. 1A is a perspective view of a valve according to one embodiment of the present application;

FIG. 1B is an exploded view of the valve shown in FIG. 1A;

FIG. 1C is an axial cross-sectional view of the valve shown in FIG. 1A;

FIG. 2 is an axial cross-sectional view of the inlet end cap, outlet end cap and spool support in an assembled state;

FIG. 3 is an axial cross-sectional view of the diaphragm in the valve shown in FIG. 1B and a partial enlarged view thereof;

FIG. 4A is an axial cross-sectional view of the valve of FIG. 1A in an open state;

FIG. 4B is a cross-sectional view of the valve taken along section line A-A in FIG. 4A;

FIG. 5A is an axial cross-sectional view of the valve of FIG. 1A in a closed state;

FIG. 5B is a cross-sectional view of the valve taken along section line B-B in FIG. 5A;

FIG. 6 is a schematic illustration of a valve system using the valve shown in FIG. 1A according to one embodiment of the present application;

FIG. 7 is a schematic view of the valve system of FIG. 6 with the valves in an open position;

FIG. 8 is a schematic illustration of a valve system using the valve shown in FIG. 1A according to yet another embodiment of the present application;

fig. 9 is a schematic view showing a state of the valve system when the valve is opened in the valve system shown in fig. 8.

Detailed Description

Various embodiments of the present application will now be described with reference to the accompanying drawings, which form a part hereof. It should be understood that although directional terms, such as "upper", "lower", "left", "right", "inner" and "outer", are used herein to describe various example structural portions and elements of the present application, these terms are used herein for convenience of description only and are determined based on example orientations shown in the drawings. Because the embodiments disclosed herein can be arranged in a variety of orientations, these directional terms are used for purposes of illustration only and are not to be construed as limiting. In the following drawings, like parts are given like reference numerals and similar parts are given like reference numerals.

FIG. 1A is a perspective view of a valve 100 according to one embodiment of the present application; FIG. 1B is an exploded view of the valve 100 shown in FIG. 1A; FIG. 1C is an axial cross-sectional view of the valve 100 shown in FIG. 1A. As shown in fig. 1A-1C, the valve 100 includes a housing 106, a poppet 124, a poppet support, and a diaphragm 126. The housing 106 is substantially cylindrical and has an axis X. The housing 106 has an inlet 102 and an outlet 104, and fluid can flow from the inlet 102 into the valve 100 and out through the outlet 104. The spool 124 is supported within the housing 106 by a spool support. The diaphragm 126 is generally cylindrical and is disposed within the housing 106 and around the valve core 124. The diaphragm 126 is attached at both ends to the housing 106 such that a control chamber 188 is formed between the diaphragm 126 and the housing 106.

Specifically, the housing 106 includes an inlet end cap 112, an outlet end cap 114, and a housing body 116. The inlet and outlet end caps 112 and 114 are respectively provided at left and right ends of the housing body 116, and the housing body 116 is provided between the inlet and outlet end caps 112 and 114.

The inlet end cap 112 includes an inlet end cap body 152 and a connector 162. The inlet end cap body 152 is cylindrical and has an annular recess 167 in the right end side wall thereof for connecting the inlet end cap 112 to the diaphragm 126. The connecting portion 162 is provided at the left end of the inlet end cover body 152 and extends vertically in the radial direction of the inlet end cover body 152. Eight through holes 172 are provided in the connecting portion 162 for connecting the inlet 102 of the valve 100 with an external pipe. The upper portion of the inlet end cap 112 is also provided with an end cap opening 128. The end cap opening 128 extends in a vertical direction and communicates with the inlet 102 of the valve 100 such that fluid flowing into the inlet 102 can flow out of the end cap opening 128.

The outlet end cap 114 is of similar construction to the inlet end cap 112. Specifically, the outlet endcap 114 includes an outlet endcap body 154 and a connecting portion 164. The outlet cap body 154 is cylindrical, and has an annular groove 168 (see the enlarged view of part a in fig. 1B) formed in a sidewall of a left end thereof for connecting the outlet cap 114 with the diaphragm 126. The connecting portion 164 is provided at the right end of the outlet head body 154 and extends vertically in the radial direction of the outlet head body 154. Eight through holes 174 are provided in the connecting portion 164 for connecting the outlet 104 of the valve 100 with an external pipe.

The housing body 116 is cylindrical, and the left and right ends thereof are tapered toward the axis X such that the middle portion of the housing body 116 has a larger diameter than the left and right ends thereof, so that the housing body 116 cooperates with the diaphragm 126 to form the control chamber 188. The housing body 116 has a thickness. The left and right annular side walls are respectively provided with an annular groove 156 and a groove 157 (see the enlarged part of part B in fig. 1B), and the groove 156 and the groove 157 are respectively used for connecting with the left and right ends of the diaphragm 126. The housing body 116 is provided at a middle portion thereof with a control chamber communication port 122 for communication with the control chamber 188.

Fig. 2 is an axial cross-sectional view of the inlet end cap 112, the outlet end cap 114, and the poppet support in an assembled state to better show structural details in the poppet support. As shown in fig. 2, the valve 100 also includes a spool support for supporting the spool 124 inside the housing 106 and a spool connection for connecting the spool 124 to the spool support. The spool holder includes a first holder 132 and a second holder 134.

The first bracket 132 includes a first spool abutting portion 194, six first claw portions 192, and a first reinforcing portion 196. The first spool abutting portion 194 is substantially annular. With a through hole 212 in the middle for receiving a spool connection. One side of the first spool abutting portion 194 is for pressing the spool 124, and the other side of the first spool abutting portion 194 is for connecting six first claw portions 192. Each of the six first claw portions 192 is elongated. One ends of the six first pawls 192 are evenly arranged on the first spool abutting portion 194 in the circumferential direction, and the other ends of the six first pawls 192 are evenly connected with the inlet end cover 112 in the circumferential direction. The first reinforcement 196 is generally a left-hand raised annular portion with a through hole 202 in the middle for receiving a spool connector. The convex structure of the first reinforcing portion 196 is provided near the first spool abutting portion 194 and is connected to each of the six first claw portions 192 to reinforce the support strength of the six first claw portions 192, so that the first bracket 132 can stably support the spool 124 inside the housing 106 through the spool connection.

Similarly, the second bracket 134 includes a second spool abutment portion 195, six second claw portions 193, and a second reinforcement portion 197. The second spool abutting portion 195 is substantially annular. With a through hole 213 in the middle for receiving a spool connection. One side of the second spool abutting portion 195 is used to press the spool 124, and the other side of the second spool abutting portion 195 is used to connect six second claw portions 193. Each of the six second claw portions 193 is elongated. One ends of the six second claw portions 193 are uniformly arranged on the second spool abutting portion 195 in the circumferential direction, and the other ends of the six second claw portions 193 are uniformly connected with the outlet cover 114 in the circumferential direction. The second reinforcement 197 is substantially in the shape of a ring projecting toward the right, and has a through hole 203 in the middle thereof for receiving a spool connector. The convex structure of the second reinforcement portion 197 is provided near the second spool abutment portion 195 and is connected to each of the six second claw portions 193 to reinforce the support strength of the six second claw portions 193, so that the second bracket 134 can stably support the spool 124 inside the housing 106 through the spool connection.

Although in the embodiment of the present application, the first bracket 132 is formed integrally with the inlet end cap 112, and the second bracket 134 is formed integrally with the outlet end cap 114. It will be appreciated by those skilled in the art that the first and second brackets 132, 134 may be connected to the inlet and outlet end caps 112, 114, respectively, by other connection means.

With continued reference to fig. 1A-1C, the valve 100 also includes a disk-shaped valve core 124. The spool 124 is disposed coaxially with the housing 106. The disc has a thickness. The valve core 124 has a circular arc shape in the circumferential direction so as to be better fitted with the diaphragm 126. The center of the spool 124 has a through hole 125 in the axial direction to receive a spool connector so that the spool 124 is connected to the spool holder.

FIG. 3 is an axial cross-sectional view of the diaphragm 126 in the valve 100 shown in FIG. 1A and a partial enlarged view thereof. As shown in fig. 3, the diaphragm 126 is substantially cylindrical. Which includes an inner film 312, an intermediate film 314, and an outer film 316 having a cylindrical shape (see a partially enlarged view of a portion C in fig. 3). Wherein the inner film 312 is disposed inside the middle film 314 and the outer film 316 is disposed outside the middle film 314. Specifically, the inner film 312 includes a middle portion 322, a left inclined portion 324, a right inclined portion 325, a left connecting portion 326, and a right connecting portion 327. Middle portion 322 is substantially cylindrical. The inside diameter of the middle portion 322 is smaller than the outside diameter of the valve core 124 so that the inner membrane 312 can rest on the valve core 124 when the valve core 124 is installed in the diaphragm 126. The left inclined portion 324 extends obliquely outward from the left side of the middle portion 322. The acute angle between the left angled portion 324 and the middle portion 322 is θ 1. The left connecting portion 326 extends radially outward from the left side of the left inclined portion 324. The left connecting portion 326 is further provided with a protrusion 328 protruding to the left in the circumferential direction. The projection 328 can mate with the groove 167 in the inlet end cap 112 such that the projection 328 can be received in the groove 167.

Similarly, a right inclined portion 325 extends obliquely outward from the right side of the middle portion 322. The acute angle between the right inclined portion 325 and the middle portion 322 is θ 2, and the acute angle θ 2 is equal to the acute angle θ 1. The right connecting portion 327 extends radially outward from the right side of the right inclined portion 325. The right connecting portion 327 is further provided with a protruding portion 329 protruding to the right side in the circumferential direction. The projection 329 can mate with the groove 168 on the outlet end cap 114 such that the projection 329 can be received in the groove 168.

It will be understood by those skilled in the art that although the acute angle θ 1 is equal to the acute angle θ 2 in the present application, the acute angle θ 1 may be different from the acute angle θ 2 in other embodiments.

The intermediate film 314 includes a middle portion 332, a left inclined portion 334, a right inclined portion 335, a left connecting portion 336, and a right connecting portion 337. The middle portion 332 is generally cylindrical. The left inclined portion 334 extends obliquely outward from the left side of the middle portion 332. The left connecting portion 336 is bent and extends radially outward from the left side of the left inclined portion 334 and then extends to the right side. The left connecting portion 336 is closely attached to the left connecting portion 326 of the inner film 312. Similarly, a right inclined portion 335 extends obliquely outward from the right side of the middle portion 332. The right connecting portion 337 has a bent shape, and extends outward in a radial direction from the right side of the right inclined portion 335 and then extends to the left side. The right connecting portion 337 is in close contact with the right connecting portion 327 of the inner film 312.

The outer layer film 316 includes a middle portion 342, a left inclined portion 344, a right inclined portion 345, a left connection portion 346, and a right connection portion 347. The middle portion 342 is generally cylindrical. The left inclined portion 344 extends obliquely outward from the left side of the middle portion 342. The left connecting portion 346 has a bent shape, and extends radially outward from the left side of the left inclined portion 344 and then extends to the right side. The left connecting portion 346 is further provided with a projecting portion 348 projecting to the right side in the circumferential direction. The projection 348 can mate with the groove 156 on the housing body 116 such that the projection 348 can be received in the groove 156. The left connecting portion 346 is closely attached to the left connecting portion 336 of the interlayer film 314.

Similarly, a right inclined portion 345 extends obliquely outward from the right side of the middle portion 342. The right connecting portion 347 has a bent shape, and extends radially outward from the right side of the right inclined portion 345 and then extends leftward. The right connecting portion 347 is further provided with a projection 349 projecting to the left side in the circumferential direction. The projection 349 can mate with the recess 157 on the housing body 116 such that the projection 349 can be received in the recess 157. The right connecting portion 349 is closely attached to the right connecting portion 337 of the interlayer film 314.

It will be understood by those skilled in the art that although the inner film 312, the intermediate film 314, and the outer film 316 are disposed in close proximity in the present application, the inner film 312, the intermediate film 314, and the outer film 316 may not be disposed in close proximity to each other, but may have voids therebetween.

It will also be understood by those skilled in the art that the intermediate layer film 314 and the outer layer film 316 may be formed in a straight tube shape without having the left and right inclined portions.

Further, the inner film 312, the intermediate film 314, and the outer film 316 of the diaphragm 126 may be separately manufactured and then assembled together, or may be integrally manufactured.

The diaphragm 126 is configured to be deformable due to different pressures experienced by both sides of the diaphragm 126 (i.e., the inner side of the inner film 312 and the outer side of the outer film 316). Specifically, the diaphragm 126 is configured to be movable toward and away from the valve core 124 so that the inner side of the diaphragm 126 can abut against and move away from the valve core 124. When the inner side of the diaphragm 126 moves away from the valve element 124, the fluid path between the inlet 102 and the outlet 104 is open and fluid can enter the valve 100 from the inlet 102 and exit the outlet 104. When the inner side of the diaphragm 126 abuts against the valve core 124, the part of the diaphragm 126 between the inlet 102 and the valve core 124 is in the shape of a truncated cone, and the part of the diaphragm 126 between the outlet 104 and the valve core 124 is also in the shape of a truncated cone. The fluid path between the inlet 102 and the outlet 104 is closed and fluid entering the valve 100 from the inlet 102 cannot exit the outlet 104.

In the embodiment of the present application, the inner film 312 and the outer film 316 are made of rubber, and the intermediate film 314 is made of canvas. The canvas has a large strength and can support the inner film 312 and the outer film 316 made of rubber. In addition, the canvas also has the characteristic of ventilation. When the inner and outer sides of the diaphragm 126 are pressurized, air in the gaps between the inner, middle and outer membranes 312, 314, 316 may be vented to the exterior of the valve 100 via the canvas, thereby allowing the inner, middle and outer membranes 312, 314, 316 to be snug.

With continued reference to fig. 1A-1C, the valve 100 also includes a spool connection for connecting the spool 124 to the spool support (i.e., the first support 132 and the second support 134). Specifically, the spool connection includes a rod 144 threaded at both ends, a nut 146, and a nut 148. The rod 144 passes through the through- holes 202, 212, 125 on the first bracket 132, and the through- holes 203, 213 on the second bracket 134. The nut 146 and the nut 148 are respectively disposed on the left side of the first reinforcement 196 and the right side of the second reinforcement 197 and are fitted over the rod 144. Nuts 146 and 148 cooperate with threads on rod 144 such that spool 124 is coupled to first bracket 132 and second bracket 134 while also clamping both ends of diaphragm 126 between inlet end cap 112 and housing body 116, and outlet end cap 114 and housing body 116, respectively, such that diaphragm 126 is coupled to housing 106.

Further, the valve 100 includes a first protective ring 108 and a second protective ring 109. The first protection ring 108 and the second protection ring 109 are respectively fitted over both ends of the case body 116 and cover a portion of the diaphragm 126 exposed from the case 106, thereby protecting the portion of the diaphragm 126 exposed from the case 106 from being damaged.

It will be appreciated by those skilled in the art that although the present application is described as being coupled to the housing 106 by way of the diaphragm 126 being clamped at both ends by the housing 106, other ways of coupling the diaphragm 126 to the housing 106 are within the scope of the present application.

FIG. 4A is an axial cross-sectional view of the valve 100 of FIG. 1A in an open state of the valve 100; fig. 4B is a cross-sectional view of the valve 100 taken along section line a-a in fig. 4A. To clearly illustrate the relative positional relationship of the diaphragm 126 and the valve core 124, only the housing 106, the diaphragm 126, and the valve core 124 are shown in fig. 4A-4B. As shown in fig. 4A-4B, when the pressure PA at the inlet 102 and the pressure PB in the control chamber 188 satisfy: PA-PB ≧ preset value, the pressure differential across diaphragm 126 can cause diaphragm 126 to move away from spool 124 and toward control chamber 188. In a state where the inner side of the diaphragm 126 is separated from the valve element 124, a communication passage 402 is formed between the inner side of the diaphragm 126 and the circumferential outer surface of the valve element 124. At this time, the fluid passage between the inlet 102 and the outlet 104 is communicated by the communication passage 402, so that the fluid flowing in from the inlet 102 can flow out of the outlet 104 through the fluid passage.

Since the diaphragm 126 is cylindrical, the force applied to the inside of the diaphragm 126 is uniform to the force applied to the outside of the diaphragm 126. When the pressure at the inlet 102 is greater than or equal to the preset value than the pressure in the control chamber 188, the movement of the diaphragm 126 toward the control chamber 188 is uniform in the circumferential direction. Since the valve body 124 has a disk shape, the communication passage 402 has an annular shape.

FIG. 5A is an axial cross-sectional view of the valve 100 of FIG. 1A in a closed state of the valve 100; fig. 5B is a cross-sectional view of the valve 100 taken along section line B-B in fig. 5A. To clearly illustrate the relative positional relationship of the diaphragm 126 and the valve core 124, only the housing 106, the diaphragm 126, and the valve core 124 are shown in fig. 5A-5B. As shown in fig. 5A-5B, when the pressure PA at the inlet 102 and the pressure PB in the control chamber 188 satisfy: PA-PB < the preset value, the diaphragm 126 abuts against the spool 124 so that no communication passage 402 is formed between the inner side of the diaphragm 126 and the spool 124. The fluid path between the inlet 102 and the outlet 104 is closed such that fluid cannot flow out of the outlet 104 after entering the valve 100 from the inlet 102.

As an example, the preset value is 0.05MPa-2.5 MPa.

In the valve 100 of the present application, the diaphragm 126 may function as both a seal and a moving member. As a seal, on the one hand, the valve 100 uses a mounting in which both ends of the diaphragm 126 are clamped between the inlet end cap 112 and the housing body 116, and the outlet end cap 114 and the housing body 116, respectively. The assembly mode is simple, the leakage points are easy to occur, the diaphragm 126 is simple in structure, good sealing performance can be guaranteed, and reliability is high. On the other hand, the opening and closing of the valve 100 is controlled by utilizing the characteristic that the diaphragm 126 can move in the circumferential direction so as to form the communication passage 402 with or without forming the communication passage 402 with the valve spool 124. When the diaphragm 126 abuts against the valve core 124, an annular sealing pair is formed between the diaphragm 126 and the valve core 124 to achieve reliable sealing. The diaphragm 126 is the only moving part in the valve 100. The annular configuration of the control chamber 188 ensures a straight-through passage, which enables a smaller flow loss while effectively reducing the overall size of the valve 100.

Fig. 6 is a schematic illustration of a valve system 600 using the valve 100 shown in fig. 1A according to one embodiment of the present application. The valve system 600 includes the valve 100, a bi-directional pump 602, and a connecting conduit 622. The valve 100 is connected to an external pipe, which contains a fluid therein. Fluid flows into the valve 100 from the inlet 102.

The bidirectional pump 602 has a first communication port 604 and a second communication port 606. The second communication port 606 is connected to a source of control fluid (not shown). The fluid source is used to provide control fluid into the control chamber 188 and can receive control fluid from the control chamber 188. The connection pipe 622 has a first communication port 631 and a second communication port 632. The first communication port 631 is connected to the control chamber communication port 122, and the second communication port 632 is connected to the first communication port 604 of the bidirectional pump 602. When bi-directional pump 602 is turned on in the forward direction, bi-directional pump 602 may flow control fluid into control chamber 188 through connecting conduit 622. When the bi-directional pump 602 is turned on in reverse, the bi-directional pump 602 may exhaust the control fluid in the control chamber 188 through the connecting conduit 622. The end cap opening 128 on the valve 100 is blocked by the seal 614 so that fluid flowing into the valve 100 from the inlet 102 cannot flow out of the end cap opening 128.

In addition, the valve system 600 further includes a control device 612. The control device 612 is communicatively coupled to the bi-directional pump 602 to control the specific flow direction of the bi-directional pump 602. The control device 612 may cause the bi-directional pump 602 to turn on in either a forward direction or a reverse direction depending on the various signals received.

The state of the valve system 600 when the valve 100 is in the closed state is described below with reference to fig. 6. Specifically, the control device 612 receives the forward enable signal and then turns the bi-directional pump 602 on in the forward direction. The bi-directional pump 602 is turned on in the forward direction, sending control fluid into the control chamber 188 and allowing the pressure PA at the inlet 102 and the pressure PB in the control chamber 188 to satisfy: PA-PB < predetermined value. The diaphragm 126 now abuts against the valve core 124 so that no communication passage 402 is formed between the inner side of the diaphragm 126 and the valve core 124, thereby placing the valve 100 in the closed state.

Fig. 7 is a state diagram of the valve system 600 in the valve system 600 shown in fig. 6 when the valve 100 is in an open state. As shown in fig. 7, the control device 612 turns on the bi-directional pump 602 in a reverse direction upon receiving the reverse turn on signal. The bi-directional pump 602 is turned on in reverse, draining control fluid in the control chamber 188 out of the control chamber 188 through the bi-directional pump 602, and allowing the pressure PA at the inlet 102 and the pressure PB in the control chamber 188 to satisfy: PA-PB is greater than or equal to the preset value. At this point, the diaphragm 126 moves toward the outside, causing the inside of the diaphragm 126 to move away from the valve element 124. A communication passage 402 is formed between the inner side of the diaphragm 126 and the spool 124. The fluid path between the inlet 102 and the outlet 104 is communicated by a communication channel 402 through which fluid flowing from the inlet 102 flows out of the outlet 104 of the valve 100.

It will be appreciated by those skilled in the art that the bi-directional pump 602 may include an off state in addition to forward and reverse opening. When the pressure in control chamber 188 can be maintained, control device 612 may send a shut down signal to bi-directional pump 602, thereby shutting down bi-directional pump 602.

It should be noted that although the valve system 600 uses two kinds of fluids, the control fluid and the fluid may be the same kind of fluid or different kinds of fluids.

Fig. 8 is a schematic diagram of a valve system 800 using the valve 100 shown in fig. 1A according to yet another embodiment of the present application. The valve system 800 includes a valve 100, a solenoid valve 802, and a connecting conduit 822. The valve 100 is connected to an external pipe, which contains a fluid therein. Fluid flows into the valve 100 from the inlet 102.

The solenoid valve 802 has a first communication port 804 and a second communication port 806. The second communication port 806 may be in communication with the atmosphere for exhausting the fluid. The solenoid valve 802 has an open state and a closed state. When the solenoid valve 802 is open, fluid is able to flow from the first communication port 804 to the second communication port 806 of the solenoid valve 802. When the solenoid valve 802 is closed, however, fluid cannot flow from the first communication port 804 to the second communication port 806 of the solenoid valve 802.

The connecting pipe 822 has a first communication port 832, a second communication port 834, and a third communication port 836. The first communication port 832 of the connecting conduit 822 is connected with the end cap opening 128. Second communication port 834 of connecting conduit 822 is connected to control chamber communication port 122 and communicates with control chamber 188. The third communication port 836 of the connection pipe 822 is connected to the first communication port 804 of the solenoid valve 802.

In addition, the valve system 600 further includes a control device 612. The control device 612 is communicatively coupled to the solenoid valve 802 to control the opening and closing of the solenoid valve 802. The control device 612 may cause the solenoid valve 802 to operate in an open or closed state based on the various signals received.

The state of the valve system 600 when the valve 100 is closed is described below with reference to fig. 8. Specifically, the control device 612 receives the close signal and closes the solenoid valve 802. When the solenoid valve 802 is closed, fluid flows from the head cover opening 128 into the control chamber 188 through the connecting conduit 822 and causes the pressure PA at the inlet 102 and the pressure PB in the control chamber 188 to satisfy: PA-PB < predetermined value. The diaphragm 126 now abuts against the valve core 124 so that no communication passage 402 is formed between the inner side of the diaphragm 126 and the valve core 124, thereby placing the valve 100 in the closed state.

Fig. 9 is a schematic view of the valve system 800 shown in fig. 8 when the valve 100 is opened. As shown in fig. 9, the control device 612 receives the opening signal and opens the solenoid valve 802. When the solenoid valve 802 is open, fluid at the inlet 102 will flow from the end cap opening 128 out of the second communication port 806 of the solenoid valve 802 through the connecting conduit 822 due to the lower pressure at the second communication port 806 of the solenoid valve 802. When fluid flows in the connecting duct 822, low pressure is generated near the flowing fluid. The adsorption effect created by the low pressure affects the surrounding fluid. More specifically, when the fluid flows from point a to point b, a low pressure is generated near the fluid, and the adsorption effect generated by the low pressure acts on the fluid at point c, so that the fluid at point c continuously flows to point b. This causes fluid in control chamber 188 to continue to flow out of control chamber 188 through control chamber communication port 122. As fluid in control chamber 188 flows out of control chamber 188, the pressure in control chamber 188 decreases. When the pressure PA at the inlet 102 and the pressure PB in the control chamber 188 satisfy: PA-PB is larger than or equal to the preset value, the diaphragm 126 moves towards the outer side, so that the inner side of the diaphragm 126 is separated from the valve core 124, and a communication channel 402 is formed between the inner side of the diaphragm 126 and the valve core 124. The fluid path between the inlet 102 and the outlet 104 is communicated by a communication channel 402 through which fluid flowing from the inlet 102 flows out of the outlet 104 of the valve 100.

It should be noted that the smaller end cap openings 128 compared to the pipe diameters of the inlet 102 and outlet 104 of the valve 100 ensure that the main fluid in the outside pipe flows through the inlet 102 and outlet 104 of the valve 100.

Those skilled in the art will appreciate that the degree to which the inner side of the diaphragm 126 is displaced from the valve spool 124 may be further controlled when controlling the opening of the solenoid valve 802, thereby controlling the opening of the valve 100.

The valve system 800 shown in fig. 8-9 is simpler in control structure than the valve system 600 shown in fig. 6-7, and the opening and closing of the valve 100 can be controlled using a solenoid valve 802 having an opening and closing. Which reduces the power plant setup and thus the cost of the control device. In another embodiment, other devices such as an ejector may be provided to achieve the control effect of the solenoid valve 802, as will be appreciated by those skilled in the art.

Further, the valve system 800 shown in fig. 8-9 utilizes fluid flowing between the inlet 102 and the outlet 104 of the valve 100 to enter the control chamber 188, without the need to obtain control fluid from other sources, which also reduces costs, as compared to the valve system 600 shown in fig. 6-7.

Although bi-directional pump 602 and solenoid valve 802 are exemplified as the regulating device to regulate the pressure in control chamber 188, it will be appreciated by those skilled in the art that other devices or piping structures may also function as the regulating device to regulate the pressure in control chamber 188 to control the opening and closing of valve 100.

The valve 100 in the valve system of the present application can rapidly respond to a pressure change in the pipe in the valve system to open and close the valve 100, and stability is high.

While only certain features of the application have been illustrated and described herein, many modifications and changes will occur to those skilled in the art. It is, therefore, to be understood that the appended claims are intended to cover all such modifications and changes as fall within the true spirit of the application.

Claims (15)

1. A valve (100) characterized by comprising:

a housing (106), the housing (106) having an inlet (102) and an outlet (104);

a valve cartridge (124), the valve cartridge (124) disposed in the housing (106); and

a diaphragm (126), the diaphragm (126) being cylindrical, the diaphragm (126) being disposed in the housing (106) and surrounding the valve element (124), both ends of the diaphragm (126) being connected to the housing (106) such that an annular control chamber (188) is formed between the diaphragm (126) and the housing (106), the diaphragm (126) being movable toward and away from the valve element (124) such that an inner side of the diaphragm (126) can abut against and move away from the valve element (124).

2. The valve (100) of claim 1, wherein:

in a state where the inner side of the diaphragm (126) is apart from the valve element (124), an annular communication passage (402) is formed between the inner side of the diaphragm (126) and the valve element (124).

3. The valve (100) of claim 1, wherein:

a closable and communicable fluid passage is formed between the inlet (102) and the outlet (104);

wherein the inner side of the diaphragm (126) is able to move away from the spool (124) to communicate with the fluid passage when the pressure of the inlet (102) is greater than or equal to a preset value than the pressure in the control chamber (188);

wherein the inner side of the diaphragm (126) is capable of abutting against the valve spool (124) when the pressure of the inlet (102) is less than a preset value than the pressure in the control chamber (188), thereby closing the fluid passage.

4. The valve (100) of claim 1, wherein:

the shell (106) is provided with a control chamber communication port (122), and the control chamber communication port (122) is communicated with the control chamber (188).

5. The valve (100) of claim 1, wherein:

the valve core (124) is disc-shaped.

6. The valve (100) of claim 1, wherein:

the diaphragm (126) comprises an inner layer film (312), an intermediate layer film (314) and an outer layer film (316), wherein the inner layer film (312), the intermediate layer film (314) and the outer layer film (316) are all cylindrical, the inner layer film (312) is arranged inside the intermediate layer film (314), and the outer layer film (316) is arranged outside the intermediate layer film (314);

wherein the inner layer membrane (312) and the outer layer membrane (316) are made of rubber, and the intermediate layer membrane (314) is made of canvas.

7. The valve (100) of claim 1, wherein:

the part of the diaphragm (126) between the inlet (102) and the valve core (124) is in a truncated cone shape.

8. The valve (100) of claim 7, wherein:

the part of the membrane (126) between the outlet (104) and the valve core (124) is in a truncated cone shape.

9. The valve (100) of claim 1, wherein:

the housing (106) includes an inlet end cap (112), an outlet end cap (114), and a housing body (116);

wherein the housing body (116) is disposed between the inlet end cap (112) and the outlet end cap (114), one end of the diaphragm (126) is sandwiched between the inlet end cap (112) and the housing body (116), and the other end of the diaphragm (126) is sandwiched between the outlet end cap (114) and the housing body (116);

wherein the housing body (116) is disposed around the diaphragm (126) to form the control chamber (188) between the housing body (116) and the diaphragm (126).

10. The valve (100) of claim 9, further comprising:

a poppet support disposed inside the housing (106) and connected to the inlet end cap (112) and the outlet end cap (114);

wherein the poppet (124) is supported in the diaphragm (126) by the poppet support.

11. The valve (100) of claim 10, wherein:

the poppet support includes a first support (132) and a second support (134), the first support (132) and the second support (134) being connected to the inlet end cap (112) and the outlet end cap (114), respectively;

the valve (100) further includes a spool connection, the spool (124) being sandwiched between the first bracket (132) and the second bracket (134) and connected to the first bracket (132) and the second bracket (134) by the spool connection.

12. The valve (100) of claim 9, wherein:

an end cap opening (128) is provided on the inlet end cap (112), the end cap opening (128) being in fluid communication with the inlet (102) of the valve (100).

13. A valve system characterized by comprising:

the valve (100) of any of claims 1 to 12;

wherein a control chamber communication port (122) is arranged on the shell (106), and the control chamber communication port (122) is communicated with the control chamber (188); and

a regulating device connected to the control chamber communication port (122) for regulating the pressure of the control chamber (188) by controlling the fluid in the control chamber (188).

14. The valve system of claim 13, further comprising:

a control device (612), the control device (612) being arranged to be able to control the opening and closing of the adjustment device.

15. The valve system of claim 13, wherein:

an end cap opening (128) provided on the housing (106), the end cap opening (128) being in fluid communication with the inlet (102) of the valve (100);

the regulating device has a regulating device inlet and a regulating device outlet;

wherein the end cap opening (128) is connected to the regulator inlet and the control chamber communication port (122) is connected to the regulator inlet;

wherein when the regulating device is open fluid within the control chamber (188) is able to flow out through the regulating device outlet and when the regulating device is closed fluid at the inlet (102) of the valve (100) is able to flow into the control chamber (188).

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