Pressure regulating valve

Abstract

The pressure regulating valve comprises a valve body, a partition piece, a valve assembly, a communicating channel, a valve seat and a cover body, and the valve body is provided with a liquid inlet flow channel, an opening groove and a liquid outlet flow channel; the valve body is provided with an opening groove, the separator is provided with an annular part, the valve body is further provided with a step part located above the opening groove, the peripheral side part of the annular part is installed on the step part, the pressure regulating valve further comprises an annular sealing part, and the annular sealing part is arranged between the annular part and the step part in a sealing ring mode; the step part is provided with a step face used for supporting the annular part and a step side wall located above the step face, a limiting pin is arranged on the step side wall, a matching groove is formed in the outer side wall of the annular part, and the limiting pin is inserted into the matching groove to limit rotation of the partition piece relative to the valve body. The limiting pin and the matching groove are arranged, the limiting pin and the matching groove are matched to limit rotation of the partition piece relative to the valve body, and therefore the situation that in the installation process, the partition piece rotates relative to the valve body, and consequently sealing of a sealing piece between the partition piece and the valve body fails is avoided.

Description

Technical Field

[0001] This application relates to the field of valve technology, and in particular to a pressure regulating valve. Background Technology

[0002] A pressure regulating valve is a type of valve used to regulate the pressure within a flow channel. It is used to adjust the pressure within the flow channel to the required pressure. However, the fluid in the pipeline system is affected by structures such as the pump body, which can cause the fluid pressure to fluctuate. In this case, it is necessary to control the pressure within the flow channel to the required pressure. Therefore, the pressure regulating valve needs to have the ability to continuously adjust in real time according to changes in the pressure within the flow channel.

[0003] A pressure regulating valve includes a valve body, a cover threaded to it, a diaphragm and a separator between the valve body and the cover, and a pressure regulating assembly located on the upper side of the diaphragm. The valve body, the outer periphery of the separator, the outer periphery of the diaphragm, and the cover are arranged sequentially from bottom to top, and the separator and the outer periphery of the diaphragm are pressed and fixed together by the fit between the cover and the valve body. However, during installation, the cover may cause the separator to rotate via the outer periphery of the diaphragm; simultaneously, the pressure regulating assembly presses the central area of ​​the diaphragm against the separator. Since a seal is provided between the separator and the valve core, the cover may cause the separator to rotate via the pressure regulating assembly, the diaphragm, and the valve core during installation. This will cause circumferential torsion of the seal between the separator and the valve body, affecting the sealing effect between the separator and the valve body. Utility Model Content

[0004] Therefore, it is necessary to provide a pressure regulating valve that can ensure that the installation process does not affect the sealing effect between the separator and the valve body.

[0005] A pressure regulating valve, comprising:

[0006] The valve body is provided with an inlet flow channel, an open slot communicating with the inlet flow channel, and an outlet flow channel;

[0007] A separator has an annular portion, which is installed in the opening groove, and a first cavity is formed between the bottom wall of the annular portion and the inner wall of the opening groove.

[0008] A valve assembly has a diaphragm disposed above an annular portion and a valve core connected to the diaphragm. A second cavity is formed between the diaphragm and a separator. The annular portion has an inner hole on its inner side. The valve core passes through the inner hole and is slidably connected to the inner hole in a sealing manner. The diaphragm can drive the valve core to move up and down as the fluid pressure in the second cavity changes.

[0009] A communication passage is arranged at least partially on the partition, one end of which communicates with the second cavity, and the other end of which communicates with the first cavity or the liquid outlet channel, so as to change the fluid pressure in the second cavity by pressure change in the first cavity or the liquid outlet channel;

[0010] A valve seat is arranged on the valve body or the partition, so as to communicate the first cavity with the liquid outlet channel, and the opening size of the valve seat can be changed by the movement of the valve core;

[0011] A cover body is connected with the valve body, and the outer periphery of the annular part and the outer periphery of the diaphragm are clamped between the cover body and the valve body, a third cavity is arranged between the cover body and the diaphragm, and a pressure regulating assembly cooperating with the valve assembly is arranged in the third cavity;

[0012] The valve body is further provided with a step part above the opening groove, the outer peripheral side part of the annular part is mounted on the step part, the pressure regulating valve further comprises an annular sealing part, the annular sealing part is sealed between the annular part and the step part, the step part is provided with a step surface for supporting the annular part and a step side wall above the step surface, a limiting pin is arranged on the step side wall, a matching groove is arranged on the outer side wall of the annular part, and the limiting pin is inserted into the matching groove to limit the rotation of the partition relative to the valve body.

[0013] Since the pressure regulating valve of the application is provided with the limiting pin and the matching groove, the limiting pin and the matching groove limit the rotation of the partition relative to the valve body, so that after the partition is mounted on the valve body during the installation of the pressure regulating valve, the relative position of the partition and the valve body is limited by the limiting pin, and then the installation of the pressure regulating assembly, the cover body and other structures will not drive the partition to rotate, so that the rotation of the partition relative to the valve body is avoided, and the torsion and deformation of the annular sealing part caused by the rotation of the partition relative to the valve body are avoided, and the poor sealing effect or even the sealing failure between the partition and the valve body caused by the torsion and deformation of the annular sealing part is avoided.

[0014] In one embodiment, the annular sealing part is axially pressed between the partition and the valve body, the part of the limiting pin inserted into the matching groove is defined as a limiting part, the height of the limiting part of the limiting pin in the axial direction of the valve body is D1, the height of the matching groove in the axial direction of the valve body is D2, and D2>D1.

[0015] Thus, the annular seal is axially pressed between the partition and the valve body, and the annular seal can be pressed by the axial abutting force between the partition and the valve body, so that the annular seal has sufficient force with the partition and the valve body, thereby ensuring that the partition and the annular seal have good sealing effect. The arrangement of D2>D1 enables the limiting pin to be more easily inserted into the matching groove, thereby facilitating installation. After the partition is installed on the valve body and the limiting pin is inserted into the matching groove, the partition has a distance that can be moved up and down, thereby adjusting the pressure of the annular seal on the partition, so that the annular seal between the partition and the valve body can be uniformly pressed and sealed. During installation, the cooperation between the matching groove and the limiting pin can avoid the situation that the compression amount of the annular seal at each position is locally poor in sealing effect and prone to leakage, thereby ensuring the sealing effect of the annular seal.

[0016] In one of the embodiments, the limiting portion is in a cylindrical structure, and the matching groove is a cylindrical groove, wherein D2<2D1.

[0017] Thus, the limiting portion is in a cylindrical structure, and the matching groove is a cylindrical groove, which is easy to process. D2<2D1 can avoid the angle of the partition relative to the valve body being too large, thereby avoiding affecting the sealing of the annular seal.

[0018] In one of the embodiments, the matching groove extends axially on the outer wall of the annular portion, and the outer wall of the limiting portion opposite side and the inner wall of the matching groove are in abutment in the circumferential direction of the annular portion.

[0019] Thus, the cooperation of the matching groove and the limiting pin can enable the partition and the valve body to move only axially, so that after the limiting pin is inserted into the matching groove, the partition cannot rotate relative to the valve body, thereby avoiding the rotation of the partition affecting the sealing effect of the annular seal. Since the partition can move axially relative to the valve body, the annular seal can be uniformly compressed in the circumferential direction during installation.

[0020] In one of the embodiments, the communication passage is in communication with the liquid outlet flow channel, the partition includes a cylinder portion extending from the bottom end of the annular portion and surrounding the outside of the valve core, the inner hole is provided through the cylinder portion, and an inner cavity is formed between the inner hole side wall and the valve core, the side wall of the cylinder portion is provided with a through groove in communication with the inner cavity and the first cavity, and the bottom end of the cylinder portion constitutes the valve seat to communicate the inner cavity with the liquid outlet flow channel. By communicating the communication passage with the liquid outlet flow channel, the pressure inside the second cavity can change with the change of the liquid outlet flow channel, thereby adjusting the pressure of the liquid outlet flow channel.

[0021] Or, the communication passage is arranged in communication with the first cavity, the valve seat is formed on the valve body, and the bottom end of the valve core penetrates the partition and is arranged in cooperation with the valve seat. By arranging the communication passage in communication with the first cavity, the pressure in the second cavity can be changed along with the pressure change of the first cavity and the liquid inlet flow channel, so that the pressure of the first cavity and the liquid inlet flow channel can be adjusted.

[0022] In one of the embodiments, the stepped side wall of the valve body is provided with a penetrating plug slot, the limiting pin has a first end and a second end, the first end of the limiting pin is fixed in the plug slot, and the second end of the limiting pin extends from the inside of the valve body and is inserted into the cooperation slot.

[0023] The embodiment is provided with the penetrating plug slot, so that the limiting pin can be installed in the valve body and the partition.

[0024] In one of the embodiments, the cover body is arranged outside the valve body, and the cover body covers the plug slot.

[0025] In this way, the end of the plug slot can be blocked by the cover body, so as to prevent the limiting pin from being pulled out from the end of the plug slot away from the partition.

[0026] In one of the embodiments, the first end of the limiting pin is in interference fit with the plug slot.

[0027] In this way, the limiting pin can be prevented from being pulled out from the plug slot due to loosening, so as to ensure the effective limiting of the partition by the limiting pin.

[0028] In one of the embodiments, when the second end of the limiting pin is in contact with the bottom wall of the cooperation slot, the distance between the first end of the limiting pin and the cover body is L1, the depth of the cooperation slot is L2, and L2>L1.

[0029] In this way, when the first end of the limiting pin moves to the outer wall of the valve body, the limiting pin still extends into the cooperation slot, so as to prevent the limiting pin from being pulled out from the cooperation slot.

[0030] In one of the embodiments, the cover body includes a cover main body and an abutting piece, the cover main body realizes the pressurization of the diaphragm and the partition through the abutting piece; the top end of the valve body is provided with a clamping slot, the abutting piece is provided with a clamping part, the clamping part is clamped in the clamping slot, so as to limit the rotation of the abutting piece relative to the valve body.

[0031] Therefore, when the cover body is installed, the abutting piece is installed first, and the abutting piece can only move along the axial direction of the valve body and cannot rotate relative to the valve body through the cooperation of the clamping portion and the clamping groove, so that the abutting piece can be installed along the axial direction of the valve body. Then, the cover body is installed, even if the cover body and the valve body are connected in rotation, the installation of the cover body will not drive the abutting piece to rotate, thereby avoiding the abutting piece driving the diaphragm and the partition to rotate, and also avoiding the abutting piece rotating relative to the diaphragm, causing the diaphragm to be cut or the diaphragm to be twisted in the circumferential direction, thereby avoiding the service life of the diaphragm being shortened.

[0032] In one of the embodiments, the valve body is provided with a shaped groove below the stepped surface.

[0033] By providing the shaped groove, the thickness of the valve body below the stepped surface can be avoided to be too large to easily process the stepped surface flat, that is, the flatness of the stepped surface is ensured, thereby ensuring the consistency of the compression rate of the annular seal between the partition and the valve body, and further ensuring the sealing effect between the partition and the valve body. BRIEF DESCRIPTION OF DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0035] Figure 1 It is a side view structural schematic diagram of the pressure regulating valve of the first embodiment of the present application;

[0036] Figure 2 It is a top view structural schematic diagram of the pressure regulating valve of the first embodiment of the present application;

[0037] Figure 3 It is a side view structural schematic diagram of the pressure regulating valve of the first embodiment of the present application; Figure 2 It is a sectional view along line A-A;

[0038] Figure 4 It is a sectional view along line B-B; Figure 2 It is a sectional view along line B-B;

[0039] Figure 5 It is a sectional view along line B-B; Figure 4 It is a sectional view along line B-B;

[0040] Figure 6 It is a sectional view along line B-B;

[0041] Figure 7 It is a sectional view along line B-B;

[0042] Figure 8 This is a side view of the partition structure according to Embodiment 1 of this application;

[0043] Figure 9 This is a cross-sectional structural diagram of Embodiment 2 of this application;

[0044] Figure 10 This is a schematic diagram of the separated side structure in Embodiment 3 of this application.

[0045] Reference numerals: 10, valve body; 101, inlet channel; 102, outlet channel; 103, opening groove; 104, first chamber; 11, stepped portion; 111, stepped surface; 112, stepped sidewall; 12, pin groove; 13, snap-fit ​​groove; 14, forming groove; 20, separator; 201, second chamber; 21, annular portion; 211, inner hole; 212, mating groove; 22, cylindrical portion; 23, inner cavity; 24, through groove; 30, valve assembly; 31, diaphragm; 32, valve core; 40, connecting channel; 50, valve seat; 60, cover body; 601, third chamber; 61, cover body; 62, abutment; 621, snap-fit ​​portion; 70, pressure regulating assembly; 80, annular seal; 90, limiting pin; 901, first end; 902, second end; 91, limiting portion. Detailed Implementation

[0046] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0047] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application's specification are for illustrative purposes only and do not represent the only possible implementation.

[0048] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0049] In the present application, unless specifically stated and limited otherwise, a first feature "on", "under", or "below" a second feature can mean that the first feature is in direct contact with the second feature, or the first feature is in indirect contact with the second feature through an intermediate medium. Moreover, the first feature "above", "over", and "on top of" the second feature can mean that the first feature is directly above or obliquely above the second feature, or only means that the first feature is horizontally higher than the second feature. The first feature "below", "under", and "underneath" the second feature can mean that the first feature is directly below or obliquely below the second feature, or only means that the first feature is horizontally lower than the second feature.

[0050] Unless otherwise defined, all technical and scientific terms used in the specification of the present application have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terminology used in the specification of the present application is for the purpose of describing specific embodiments only and is not intended to be limiting of the present application. The term "and / or" used in the specification of the present application includes any and all combinations of one or more related items.

[0051] Embodiment one

[0052] Please refer to Figures 1 to 3 The present application provides a pressure regulating valve, comprising a valve body 10, a partition 20, a valve assembly 30, a communication channel 40, a valve seat 50, and a cover 60.

[0053] The valve body 10 is provided with an inlet flow channel 101, an open groove 103 in communication with the inlet flow channel 101, and an outlet flow channel 102. The partition 20 has an annular portion 21 installed in the open groove 103, and a first cavity 104 is formed between the bottom wall of the annular portion 21 and the inner wall of the open groove 103. The valve assembly 30 has a diaphragm 31 arranged above the annular portion 21 and a valve core 32 connected to the diaphragm 31, and a second cavity 201 is formed between the diaphragm 31 and the partition 20. The inner side of the annular portion 21 has an inner hole 211, the valve core 32 penetrates the inner hole 211 and is in sealed sliding connection with the inner hole 211, and the diaphragm 31 can drive the valve core 32 to move up and down with the change of fluid pressure in the second cavity 201. It is worth mentioning that "sealed sliding connection" means that the two components are in sliding fit, and the sliding fit forms a sealed connection to prevent fluid from leaking from the sliding fit.

[0054] The communication channel 40 is at least partially arranged on the partition 20 to communicate the second cavity 201 and the outlet flow channel 102. As shown in Figure 3 The communication channel 40 is in communication with the second cavity 201 at one end and the outlet flow channel 102 at the other end, so that when the pressure in the outlet flow channel 102 changes, the fluid pressure in the second cavity 201 will also change.

[0055] Please refer toFigure 3 The valve seat 50 is arranged on the partition 20 to communicate the first cavity 104 with the outlet flow channel 102, and the valve core 32 is movable to change the opening size of the valve seat 50. The cover 60 is connected with the valve body 10, and the outer periphery of the annular part 21 and the outer periphery of the diaphragm 31 are clamped between the cover 60 and the valve body 10. A third cavity 601 is arranged between the cover 60 and the diaphragm 31, and a pressure regulating assembly 70 is arranged in the third cavity 601 to cooperate with the valve assembly 30.

[0056] Further, referring to Figures 3 to 6 The valve body 10 further comprises a step part 11 arranged above the opening groove 103, and the outer peripheral side of the annular part 21 is mounted on the step part 11. The pressure regulating valve further comprises an annular sealing part 80, which is annularly arranged between the annular part 21 and the step part 11. Specifically, the annular sealing part 80 can be arranged between the outer side wall of the annular part 21 and the step part 11, or can be arranged between the bottom wall of the annular part 21 and the step part 11.

[0057] Referring to Figure 6 The step part 11 comprises a step surface 111 and a step side wall 112 arranged above the step surface 111. Referring to Figure 5 The step side wall 112 is provided with a limiting pin 90, and a cooperating groove 212 is arranged on the outer side wall of the annular part 21. The limiting pin 90 is inserted into the cooperating groove 212 to limit the rotation of the partition 20 relative to the valve body 10.

[0058] The installation process of the pressure regulating valve is as follows: first, the valve core 32 is connected with the diaphragm 31 to form the valve assembly 30 after passing through the partition 20, then the sealing part, the partition 20 assembled with the valve assembly 30 are installed into the valve body 10, then the limiting pin 90 is inserted into the cooperating groove 212, then the pressure regulating assembly 70 is installed above the valve assembly 30, and finally the cover 60 is connected to the valve body 10.

[0059] Since the pressure regulating valve of the present application is provided with the limiting pin 90 and the cooperating groove 212, the limiting pin 90 and the cooperating groove 212 cooperate to limit the rotation of the partition 20 relative to the valve body 10. Therefore, in the installation process of the aforementioned pressure regulating valve, after the partition 20 is installed in the valve body 10, the relative position of the partition 20 and the valve body 10 is limited by the limiting pin 90, and then the installation of the pressure regulating assembly 70, the cover 60 and other structures will not drive the partition 20 to rotate, thereby avoiding the sealing failure of the sealing part between the partition 20 and the valve body 10 caused by the rotation of the partition 20 relative to the valve body 10.

[0060] Referring to Figure 3 and Figure 4The pressure regulating assembly 70 is arranged on the inner periphery of the diaphragm 31 and the upper end of the valve core 32. The pressure regulating assembly 70 is an elastic assembly. When the upward pressure is greater than the elastic force of the elastic assembly, the pressure regulating assembly 70 is compressed. When the upward pressure is less than the elastic force of the elastic assembly, the elastic assembly pushes the inner periphery of the diaphragm 31 and the valve core 32 to move downward. Of course, in other embodiments, the pressure regulating assembly 70 can also be a gas pressure regulating structure, that is, by adjusting the gas pressure at the top end of the diaphragm 31 to adjust the force at the top end of the diaphragm 31.

[0061] Please refer to Figure 3 The communication channel 40 is arranged in communication with the liquid outlet flow channel 102. The partition 20 includes a cylindrical portion 22 extending from the bottom end of the annular portion 21 and surrounding the outside of the valve core 32. The inner hole 211 is arranged through the cylindrical portion 22, and the inner hole 211 side wall and the valve core 32 form an inner cavity 23. The cylindrical portion 22 side wall is provided with a through groove 24 in communication with the inner cavity 23 and the first cavity 104. The bottom end of the cylindrical portion 22 constitutes a valve seat 50 to communicate the inner cavity 23 and the liquid outlet flow channel 102. In this embodiment, the fluid enters the first cavity 104 from the liquid inlet flow channel 101, enters the inner cavity 23 through the through groove 24, and flows from the inner cavity 23 to the liquid outlet flow channel 102 through the valve seat 50. Since the communication channel 40 communicates the liquid outlet flow channel 102 and the second cavity 201, the fluid pressure in the liquid outlet flow channel 102 affects the fluid pressure in the second cavity 201. When the fluid pressure in the liquid outlet flow channel 102 decreases, the fluid pressure in the second cavity 201 decreases. When the downward force of the pressure regulating assembly 70 on the diaphragm 31 is greater than the upward pressure of the fluid in the second cavity 201 on the diaphragm 31, the pressure regulating assembly 70 pushes the inner periphery of the diaphragm 31 and the valve core 32 to move downward, so that the opening degree of the valve seat 50 increases, and the pressure drop at the valve seat 50 decreases, and the fluid pressure in the liquid outlet flow channel 102 increases. Conversely, the same is true. Finally, the fluid pressure in the liquid outlet flow channel 102 is stabilized in a predetermined pressure range, and the fluid pressure in the liquid outlet flow channel 102 will not fluctuate sharply due to the fluctuation of the pipeline pressure. The pressure regulating valve can reduce the fluid pressure and keep the fluid pressure stable, so that the pipeline system connected with the liquid outlet flow channel 102 can have a relatively small and stable fluid input source.

[0062] Please refer to Figure 5In the embodiment, the annular seal 80 is axially pressed between the partition 20 and the valve body 10, that is, the annular seal 80 is pressed between the stepped surface 111 and the bottom wall of the annular portion 21. In this way, the pressure of the partition 20 on the annular seal 80 can be adjusted by adjusting the axial relative position of the partition 20 and the valve body 10, so that the annular seal 80 can be tightly pressed between the bottom wall of the annular portion 21 of the partition 20 and the stepped surface 111, thereby forming a good seal. Of course, in other embodiments, the annular seal 80 can also be pressed between the stepped side wall 112 and the outer side wall of the annular portion 21.

[0063] As shown in Figure 5 Further, the part of the limiting pin 90 inserted into the matching groove 212 is defined as the limiting portion 91, the height of the limiting portion 91 of the limiting pin 90 in the axial direction of the valve body 10 is D1, the height of the matching groove 212 in the axial direction of the valve body 10 is D2, and D2>D1. In this way, the limiting pin 90 is easier to be inserted into the matching groove 212, thereby facilitating installation. After the partition 20 is installed on the valve body 10 and the limiting pin 90 is inserted into the matching groove 212, the partition 20 has a distance that can be moved up and down, thereby the pressure of the partition 20 on the annular seal 80 can be adjusted, so that the annular seal 80 between the partition 20 and the valve body 10 can be uniformly pressed and sealed, thereby ensuring the sealing effect of the annular seal 80. Thus, it can be avoided that because of the cooperation between the limiting pin 90 and the matching groove 212, the side of the partition 20 close to the limiting pin 90 cannot move downward, while the rest part can move a small distance in the axial direction, thereby causing the pressure on different parts of the annular seal 80 to be different, and further causing the leakage of the annular seal 80

[0064] As shown in Figure 5 and Figure 8 In an embodiment, the limiting portion 91 is a cylindrical structure, and the matching groove 212 is a cylindrical groove, so that the height D1 of the limiting portion 91 of the limiting pin 90 in the axial direction of the valve body 10 is the diameter of the limiting portion 91, and the height D2 of the matching groove 212 in the axial direction of the valve body 10 is the inner diameter of the matching groove 212. Further, D2<2D1. The limiting portion 91 is provided in a cylindrical structure, and the matching groove 212 is provided in a cylindrical groove, which is easy to process. D2<2D1 can avoid that the angle of the partition 20 relative to the valve body 10 is too large, thereby avoiding affecting the sealing of the annular seal 80. Of course, in other embodiments, the limiting portion 91 can also be other shapes of cylinders, and the matching groove 212 can also be other shapes of grooves.

[0065] As shown in Figure 5The stepped side wall 112 of the valve body 10 is provided with a through pin slot 12, the limiting pin 90 has a first end 901 and a second end 902, the first end 901 of the limiting pin 90 is fixed in the pin slot 12, and the second end 902 of the limiting pin 90 extends from the inside of the valve body 10 and is inserted into the matching slot 212. During installation, the partition 20 can be first installed in the valve body 10, then the limiting pin 90 is inserted into the pin slot 12, and finally the limiting pin 90 is pushed so that the second end 902 of the limiting pin 90 extends into the matching slot 212. It can be seen that, in this embodiment, by providing the through pin slot 12, the limiting pin 90 is conveniently installed in the valve body 10 and the partition 20.

[0066] Further, the first end 901 of the limiting pin 90 and the pin slot 12 are in interference fit. In this way, the limiting pin 90 can be prevented from loosening and coming out of the pin slot 12, thereby ensuring the effective limiting of the partition 20 by the limiting pin 90. Figure 6 As shown in the figure, after the first end 901 of the limiting pin 90 is completely inserted into the pin slot 12, the limiting pin 90 cannot be disassembled, that is, the partition 20 and the valve body 10 are integrally arranged, thereby realizing that the valve body is suitable for some high-purity valve bodies. For valve bodies applied to ultrapure water or high-purity chemical fluids, it is necessary to ensure the high purity of the valve body. Therefore, it is expected that the valve body will not be disassembled after installation or cannot be disassembled, thereby avoiding pollution of the inside of the valve body caused by disassembly.

[0067] Further, the first end 901 and the second end 902 of the limiting pin 90 are tapered in a direction away from each other. In this way, the two ends of the limiting pin 90 are conveniently installed in the pin slot 12, and the limiting pin 90 is conveniently inserted into the matching slot 212. Moreover, both ends are provided with tapered portions, so that the two ends of the limiting pin 90 do not need to be distinguished during installation, and the installation is more convenient.

[0068] Further, please refer to Figure 4 and Figure 5 The cover 60 is sleeved outside the valve body 10, and the cover 60 covers the pin slot 12. In this way, the end of the pin slot 12 can be blocked and limited by the cover 60, thereby preventing the limiting pin 90 from coming out of the end of the pin slot 12 away from the partition 20. In this embodiment, the cover 60 and the valve body 10 are threadedly connected, and the pin slot 12 is arranged on the threaded portion of the valve body 10.

[0069] Please refer to Figure 5 When the second end 902 of the limiting pin 90 contacts the bottom wall of the matching slot 212, the distance between the first end 901 of the limiting pin 90 and the cover 60 is L1, and the depth of the matching slot 212 is L2, L2>L1. In this way, when the first end 901 of the limiting pin 90 moves to the outer wall of the valve body 10, the limiting pin 90 still extends into the matching slot 212, thereby avoiding the situation that the limiting pin 90 comes out of the matching slot 212.

[0070] Please refer to Figure 3 and Figure 4 , the cover body 60 comprises a cover main body 61 and an abutting piece 62, the cover main body 61 realizes pressurization to the diaphragm 31 and the partition piece 20 through the abutting piece 62; wherein, as shown in Figure 7 , the valve body 10 is provided with a clamping groove 13 at the top end, the abutting piece 62 is provided with a clamping part 621, the clamping part 621 is clamped in the clamping groove 13 to limit the rotation of the abutting piece 62 relative to the valve body 10. In this way, when installing the cover body 60, the abutting piece 62 is installed first, and the cooperation of the clamping part 621 and the clamping groove 13 makes the abutting piece 62 only move along the axial direction of the valve body 10, and cannot rotate relative to the valve body 10, so that the abutting piece 62 can be installed along the axial direction of the valve body 10, and then the cover main body 61 is installed, even if the cover main body 61 and the valve body 10 are connected in rotation, the installation of the cover main body 61 will not drive the abutting piece 62 to rotate, thereby avoiding the abutting piece 62 driving the diaphragm 31 and the partition piece 20 to rotate, and also avoiding the abutting piece 62 rotating relative to the diaphragm 31, causing the diaphragm 31 to be cut or the diaphragm 31 to be twisted in the circumferential direction, thereby avoiding the shortening of the service life of the diaphragm 31 caused thereby.

[0071] In this embodiment, the clamping part 621 is a protrusion provided on the side wall of the abutting piece 62, and the clamping groove 13 is a groove provided on the top end of the valve body 10, which is very simple in structure and easy to process.

[0072] Further, please refer to Figure 6 , the valve body 10 is provided with a shaped groove 14 below the stepped surface 111. By providing the shaped groove 14, the thickness of the valve body 10 below the stepped surface 111 can be avoided to be too large to cause forming defects in processing, thereby ensuring the flatness of the stepped surface 111, thereby ensuring the consistency of the compression rate of the annular sealing member 80 between the partition piece 20 and the valve body 10, and further ensuring the sealing effect between the partition piece 20 and the valve body 10.

[0073] Embodiment two

[0074] The difference from embodiment one is that:

[0075] The communication channel 40 is used to communicate the second cavity 201 and the first cavity 104, as shown in Figure 9 , in this embodiment, one end of the communication channel 40 communicates with the second cavity 201, and the other end communicates with the first cavity 104, so as to change the fluid pressure in the second cavity 201 through the pressure change in the first cavity 104.

[0076] Please refer to Figure 9In this embodiment, the valve seat 50 is formed on the valve body 10, and the bottom end of the valve core 32 penetrates the partition 20 and is arranged in cooperation with the valve seat 50. In this embodiment, the fluid enters the first cavity 104 from the inlet flow channel 101, and the fluid in the first cavity 104 flows to the outlet flow channel 102 through the valve seat 50. Since the communication passage 40 communicates the first cavity 104 and the second cavity 201, the fluid pressure in the inlet flow channel 101 can affect the fluid pressure in the second cavity 201. When the fluid pressure in the inlet flow channel 101 rises, the fluid pressure in the second cavity 201 rises accordingly. When the downward force of the pressure regulating assembly 70 on the diaphragm 31 is less than the fluid pressure in the second cavity 201, the diaphragm 31 will press the pressure regulating assembly 70 upward and move the valve core 32 upward, so that the opening degree of the valve seat 50 increases, and the fluid pressure in the inlet flow channel 101 decreases. Conversely, the same is true. Ultimately, the fluid pressure in the inlet flow channel 101 is stabilized within a predetermined pressure range, and the fluid pressure in the inlet flow channel 101 will not fluctuate sharply due to fluctuations in the pipeline pressure. Through the valve body, the pressure of the pipeline part connected with the inlet flow channel 101 can be stabilized.

[0077] Embodiment three

[0078] The difference between this embodiment and the first or second embodiment is that:

[0079] Referring to Figure 10 In this embodiment, the matching groove 212 is arranged to extend axially on the outer wall of the annular part 21, and the outer wall of the limiting pin 90 and the inner wall of the matching groove 212 abut in the circumferential direction of the annular part 21. In this way, the matching of the matching groove 212 and the limiting pin 90 can realize the axial movement between the partition 20 and the valve body 10, so that after the limiting pin 90 is inserted into the matching groove 212, the partition 20 cannot rotate relative to the valve body 10, thereby avoiding the influence of the rotation of the partition 20 on the sealing effect of the annular seal 80, and ensuring that the partition 20 can move axially to ensure that the annular seal 80 can be uniformly pressed to ensure the sealing effect of the annular seal 80.

[0080] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description simple, all possible combinations of the technical features in the above-mentioned embodiments are not described, but as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope of the present application.

[0081] The above-mentioned embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the patent scope of the application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. A pressure regulating valve, comprising: The valve body is provided with an inlet flow channel, an open slot communicating with the inlet flow channel, and an outlet flow channel; A separator has an annular portion, which is installed in the opening groove, and a first cavity is formed between the bottom wall of the annular portion and the inner wall of the opening groove. A valve assembly has a diaphragm disposed above an annular portion and a valve core connected to the diaphragm. A second cavity is formed between the diaphragm and a separator. The annular portion has an inner hole on its inner side. The valve core passes through the inner hole and is slidably connected to the inner hole in a sealing manner. The diaphragm can drive the valve core to move up and down as the fluid pressure in the second cavity changes. A connecting channel, at least partially disposed on the separator, is configured to connect one end to the second cavity and the other end to the first cavity or the liquid outlet channel, so as to change the fluid pressure in the second cavity by means of pressure changes in the first cavity or the liquid outlet channel; The valve seat is mounted on the valve body or partition to connect the first chamber with the liquid outlet channel. The movement of the valve core can change the opening size of the valve seat. The cover is connected to the valve body and clamps the outer periphery of the annular part and the outer periphery of the diaphragm between the cover and the valve body. A third cavity is formed between the cover and the diaphragm, and a pressure regulating component that cooperates with the valve assembly is provided in the third cavity. The valve body is characterized by having a stepped portion located above the opening groove, with the outer peripheral portion of the annular portion mounted on the stepped portion. The pressure regulating valve also includes an annular seal, the sealing ring of which is disposed between the annular portion and the stepped portion; The stepped portion is provided with a stepped surface for supporting the annular portion and a stepped sidewall located above the stepped surface. A limiting pin is provided on the stepped sidewall, and a mating groove is provided on the outer sidewall of the annular portion. The limiting pin is inserted into the mating groove to restrict the rotation of the separator relative to the valve body.

2. The pressure regulating valve according to claim 1, characterized in that, The annular seal is axially pressed between the separator and the valve body. The portion into which the limiting pin is inserted is defined as the limiting part. The height of the limiting part of the limiting pin in the axial direction of the valve body is D1, and the height of the mating groove in the axial direction of the valve body is D2, where D2 > D1.

3. The pressure regulating valve according to claim 2, characterized in that, The limiting part is a cylindrical structure, and the mating groove is a cylindrical groove, wherein D2 < 2D1.

4. The pressure regulating valve according to claim 2, characterized in that, The mating groove extends axially on the outer wall of the annular portion, and in the circumferential direction of the annular portion, the outer wall of the limiting portion on the opposite side abuts against the inner wall of the mating groove.

5. The pressure regulating valve according to claim 1, characterized in that, The connecting channel is connected to the liquid outlet channel. The separator includes a cylindrical portion extending from the bottom end of the annular portion and surrounding the outside of the valve core. The inner hole is provided through the cylindrical portion, and an inner cavity is formed between the inner hole sidewall and the valve core. A through groove is opened on the sidewall of the cylindrical portion to connect the inner cavity and the first cavity. The bottom end of the cylindrical portion forms the valve seat to connect the inner cavity and the liquid outlet channel. Alternatively, the connecting channel is connected to the first cavity, the valve seat is formed on the valve body, and the bottom end of the valve core passes through the separator and is configured to cooperate with the valve seat.

6. The pressure regulating valve according to claim 1, characterized in that, The stepped sidewall of the valve body is provided with a through pin groove. The limiting pin has a first end and a second end. The first end of the limiting pin is fixed in the pin groove, and the second end of the limiting pin extends out from the inside of the valve body and is inserted into the mating groove.

7. The pressure regulating valve according to claim 6, characterized in that, The cover is fitted onto the outside of the valve body, and the cover covers the pin groove.

8. The pressure regulating valve according to claim 6, characterized in that, The first end of the limiting pin and the pin groove are interference-fitted.

9. The pressure regulating valve according to claim 5, characterized in that, When the second end of the limiting pin contacts the bottom wall of the mating groove, the distance between the first end of the limiting pin and the cover is L1, and the depth of the mating groove is L2, where L2 > L1.

10. The pressure regulating valve according to claim 1, characterized in that, The cover includes a cover body and an abutment member, wherein the cover body applies pressure to the diaphragm and the separator through the abutment member; The valve body has a snap-fit ​​groove at its top end, and the abutment has a snap-fit ​​part. The snap-fit ​​part snaps into the snap-fit ​​groove to restrict the rotation of the abutment relative to the valve body.

11. The pressure regulating valve according to claim 1, characterized in that, The valve body has a forming groove below the stepped surface.

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