Unloading valve

Abstract

The utility model relates to the technical field of valves, in particular to an unloading valve. The unloading valve comprises a valve seat, a mounting seat and an adjusting cylinder; the mounting seat is arranged between the valve seat and the adjusting cylinder, two opposite ends of the mounting seat are respectively connected with the valve seat and the adjusting cylinder, and a diaphragm is mounted in the mounting seat; wherein the adjusting cylinder is provided with a mounting hole, the mounting seat is provided with a mounting part, the mounting part extends into the adjusting cylinder from the mounting hole and is fixedly connected with the adjusting cylinder, the mounting part is provided with an expansion section, and the radial size of at least part of the expansion section is larger than that of the mounting hole. According to the unloading valve disclosed by the invention, the expansion section is clamped in the adjusting cylinder, so that the movement trend that the mounting seat and the adjusting cylinder are far away from each other is limited, and the unloading valve has relatively high mounting strength.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, and in particular, to a pressure relief valve. Background Art

[0002] The pressure relief valve can be applied to an air conditioner. When the compressor malfunctions, the refrigerant pressure on the high-pressure side of the refrigeration system is too high, which will cause the compressor to automatically shut down. The compressor is prone to damage under the working conditions of frequent shutdown and startup, seriously affecting the service life of the compressor. Therefore, a pressure relief valve can be introduced into the refrigeration pipeline. When the refrigerant pressure on the high-pressure side of the refrigeration system reaches the set value, the pressure relief valve opens to relieve the pressure of the high-pressure refrigerant, thereby avoiding frequent automatic shutdown of the compressor and protecting the compressor and the refrigeration system.

[0003] In the related art, the adjusting cylinder and the valve seat are connected through a mounting seat. Under the working conditions of frequent opening and closing or large system impact force, loosening is likely to occur, resulting in the failure of the pressure relief valve.

[0004] It should be noted that the information disclosed in the above background art section is only used to enhance the understanding of the background of the present disclosure. Therefore, it may include information that does not constitute the prior art known to those of ordinary skill in the art. Summary of the Utility Model

[0005] The purpose of the present disclosure is to provide a pressure relief valve, which can improve the installation strength of the pressure relief valve.

[0006] The pressure relief valve includes a valve seat, a mounting seat and an adjusting cylinder; the mounting seat is arranged between the valve seat and the adjusting cylinder, and the opposite ends of the mounting seat are respectively connected to the valve seat and the adjusting cylinder, and a diaphragm is installed in the mounting seat;

[0007] Wherein, the adjusting cylinder is provided with a mounting hole, the mounting seat is provided with a mounting portion, the mounting portion extends into the adjusting cylinder from the mounting hole and is fixedly connected to the adjusting cylinder, the mounting portion has an expansion section, and at least part of the radial dimension of the expansion section is larger than the radial dimension of the mounting hole.

[0008] In an exemplary embodiment of the present disclosure, the mounting seat includes an upper cover and a base, the diaphragm is clamped between the upper cover and the base, the mounting portion is arranged on the top of the upper cover, and the base is used for connecting to the valve seat.

[0009] In an exemplary embodiment of the present disclosure, the mounting portion further includes a fitting section, the fitting section is connected to the expansion section and is located on the side close to the diaphragm; the radial dimension of the outer wall surface of the fitting section is less than or equal to the radial dimension of the mounting hole.

[0010] In an exemplary embodiment of the present disclosure, the upper cover has a limiting surface, the fitting section is connected to the limiting surface, and the bottom of the adjusting cylinder abuts against the limiting surface.

[0011] In an exemplary embodiment of the present disclosure, the mounting seat and the adjusting cylinder are welded and connected outside the limiting surface to fix the mounting seat and the adjusting cylinder.

[0012] In an exemplary embodiment of the present disclosure, the radial dimension of the expansion section gradually increases from the valve seat towards the adjusting cylinder.

[0013] In an exemplary embodiment of the present disclosure, the radial direction of the expansion section is parallel to the radial direction of the diaphragm.

[0014] In an exemplary embodiment of the present disclosure, the maximum value of the radial dimension of the expansion section is smaller than the inner diameter of the adjusting cylinder.

[0015] In an exemplary embodiment of the present disclosure, the maximum radius a of the expansion section and the radius b of the mounting hole satisfy a / b≥1.2.

[0016] In an exemplary embodiment of the present disclosure, the valve seat is provided with a first flow port and a second flow port, a valve core is arranged in the valve seat, the unloading valve further includes a first elastic member and a plug, the first elastic member is located in the adjusting cylinder, the plug is located at one end of the first elastic member close to the valve core, and opposite sides of the diaphragm are respectively in contact with the plug and the valve core.

[0017] In an exemplary embodiment of the present disclosure, the plug includes a top plate, a steel ball and a steel ball seat. Among them, the lower end of the first elastic member cooperates with the top plate, the lower end surface of the top plate acts on the steel ball seat through the steel ball, and the bottom of the steel ball seat is in contact with the diaphragm; among them, the upper cover has a through opening to enable the plug to pass through the upper cover.

[0018] In an exemplary embodiment of the present disclosure, a second elastic member is sleeved on the outer periphery of the valve core, and the second elastic member is used to make the valve core have a tendency to move towards the adjusting cylinder.

[0019] For the unloading valve of the present disclosure, by providing a mounting hole at the bottom of the adjusting cylinder, the mounting portion extends into the mounting hole, and the expansion section is clamped in the adjusting cylinder, thereby limiting the movement tendency of the mounting seat and the adjusting cylinder to move away from each other. Therefore, it has a high installation strength, the connection between the adjusting cylinder and the mounting seat is not easy to loosen, has a better seismic resistance effect, and has better stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings herein are incorporated into the specification and constitute a part of this specification, showing embodiments consistent with the present disclosure, and are used together with the specification to explain the principles of the present disclosure. Obviously, the accompanying drawings in the following description are only some embodiments of the present disclosure. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0021] To better understand the present disclosure, reference may be made to the embodiments shown in the following drawings. The components in the drawings are not necessarily to scale, and related elements may be omitted to emphasize and clearly illustrate the technical features of the present disclosure. Additionally, related elements or components may have different arrangements known in the art. Further, in the drawings, the same reference numerals denote the same or similar components in each drawing. Among them:

[0022] Figure 1 Schematic diagram of an exemplary embodiment of the unloading valve of the present disclosure;

[0023] Figure 2 Schematic diagram of the adjusting cylinder in an exemplary embodiment of the unloading valve of the present disclosure;

[0024] Figure 3 Schematic diagram of the cooperation between the mounting portion and the adjusting cylinder in an exemplary embodiment of the unloading valve of the present disclosure.

[0025] The descriptions of the reference numerals are as follows:

[0026] 1. Valve seat; 101. First flow port; 102. Second flow port; 11. Inlet pipe; 12. Outlet pipe; 13. Spool; 14. Second elastic member; 2. Mounting seat; 201. Expansion section; 202. Fitting section; 21. Mounting portion; 22. Upper cover; 220. Limiting surface; 23. Base; 3. Adjusting cylinder; 301. Mounting hole; 31. First elastic member; 32. Plug; 321. Top plate; 322. Steel ball; 323. Steel ball seat; 33. Adjusting nut; 34. Adjusting screw; 4. Diaphragm. Specific embodiments

[0027] Next, the technical solutions in the exemplary embodiments of the present disclosure will be clearly and completely described in conjunction with the drawings in the exemplary embodiments of the present disclosure. The exemplary embodiments described herein are only for illustrative purposes and are not intended to limit the protection scope of the present disclosure. Therefore, it should be understood that various modifications and changes can be made to the exemplary embodiments without departing from the protection scope of the present disclosure.

[0028] Unless otherwise specified or stated, the technical terms or scientific terms used in the present disclosure should have the ordinary meaning understood by those of ordinary skill in the art to which the present disclosure pertains. For example, "connection" can be a fixed connection, a movably connected, an integrally connected, a detachable connection, a directly connected, or an indirectly connected through an intermediate medium. The terms "comprising" and "having" are used to indicate an open-ended inclusion meaning and mean that there may be additional elements / components / etc. in addition to the listed elements / components / etc.; the terms "first" and "second", etc. are only used as labels and are not a limitation on the quantity of their objects.

[0029] Further, it should be understood that the orientation terms such as "top / bottom", "upper / lower", "inner / outer", etc. described in the exemplary embodiments of the present disclosure are only for convenience, for example, described according to the angles shown in the drawings, or based on the general understanding of the unloading valve in the art, and should not be construed as a limitation on the exemplary embodiments of the present disclosure. For example, referring to the drawings, for the unloading valve, the direction of the adjusting cylinder 3 - mounting seat 2 - valve seat 1 is from top to bottom. The "bottom" of a certain component refers to its lower end, and the "top" refers to its top end. Those skilled in the art can know that when the absolute position of the object being described changes, the relative position relationship may also change accordingly. For example, after rotating the structure of the unloading valve in the exemplary embodiment of the present disclosure or changing the observation direction and perspective, "upper" may also become "lower" or "left", "right", and such changes will not cause obstacles to the understanding of those skilled in the art.

[0030] The present disclosure provides an unloading valve. Refer to Figure 1 the schematic diagram of an exemplary embodiment of the shown unloading valve. The unloading valve includes a valve seat 1, a mounting seat 2, and an adjusting cylinder 3; the mounting seat 2 is provided between the valve seat 1 and the adjusting cylinder 3, and the opposite ends of the mounting seat 2 are respectively connected to the valve seat 1 and the adjusting cylinder 3. A diaphragm 4 is installed in the mounting seat 2. Among them, the adjusting cylinder 3 is provided with a mounting hole 301, the mounting seat 2 is provided with a mounting portion 21, the mounting portion 21 extends into the adjusting cylinder 3 from the mounting hole 301 and is fixedly connected to the adjusting cylinder 3. The mounting portion 21 has an expansion section 201, and at least part of the radial dimension of the expansion section 201 is larger than the radial dimension of the mounting hole 301.

[0031] For the unloading valve of the present disclosure, by providing the mounting hole 301 in the adjusting cylinder 3, the mounting portion 21 extends into the mounting hole 301, and at least part of the radial dimension of the expansion section 201 is larger than the radial dimension of the mounting hole 301, it can be clamped in the adjusting cylinder 3, thereby limiting the movement tendency of the mounting seat 2 and the adjusting cylinder 3 to move away from each other. Therefore, it has a high installation strength, the connection between the adjusting cylinder 3 and the mounting seat 2 is not easy to loosen, has a better anti-seismic effect, and better stability.

[0032] Specifically, refer to Figure 1 the shown. Exemplarily, a structure of an unloading valve is provided. The valve seat 1 is provided with a first flow port 101 and a second flow port 102. The first flow port 101 is used to be connected to the inlet pipe 11, and the second flow port 102 is used to be connected to the outlet pipe 12, or the first flow port 101 is used to be connected to the outlet pipe 12, and the second flow port 102 is used to be connected to the inlet pipe 11. A valve core 13 is arranged in the valve seat 1; a first elastic member 31 is arranged in the adjusting cylinder 3, and a top plug 32 is arranged on the side of the first elastic member 31 close to the valve seat 1; the opposite sides of the diaphragm 4 are respectively in contact with the top plug 32 and the valve core 13.

[0033] Figure 2A schematic diagram of an adjusting cylinder 3 is shown. The adjusting cylinder 3 can be a hollow cylindrical barrel, and a circular mounting hole 301 can be provided at the bottom of the adjusting cylinder 3. In an exemplary embodiment of the present disclosure, reference Figure 1 As shown, a second elastic member 14 is sleeved on the outer periphery of the valve core 13, and the second elastic member 14 is used to make the valve core 13 tend to move in the direction of the adjusting cylinder 3. For example, the first elastic member 31 and the second elastic member 14 can both be springs, or elastic clamping plates, etc. The working process of the unloading valve can be as follows:

[0034] When the system pressure does not reach the opening pressure set by the unloading valve, the pressure of the first elastic member 31 acts on the plug 32, acts on the upper surface of the diaphragm 4 through the plug 32, and holds the valve core 13, so that the unloading valve is in a closed state; when the system pressure reaches / is higher than the opening pressure set by the unloading valve, the fluid at the inlet pipe 11 reaches the mounting seat 2 from the valve cavity of the valve seat 1 and acts on the lower surface of the diaphragm 4. At this time, the medium pressure received by the diaphragm 4 is higher than the elastic force exerted by the first elastic member 31 through the plug 32. The diaphragm 4 is concave upward under the action of the medium pressure, and the second elastic member 14 drives the valve core 13 to open the valve port, so that the fluid flows out through the valve port via the outlet pipe 12 (flows to the low-pressure circuit) to achieve unloading.

[0035] Specifically, referring to Figure 3 the schematic diagram of the cooperation between the mounting portion 21 and the adjusting cylinder 3 shown. For the convenience of understanding, Figure 3 only the valve seat 1, the mounting seat 2, the adjusting cylinder 3 and the diaphragm 4 are shown. In an exemplary embodiment of the present disclosure, the mounting seat 2 includes an upper cover 22 and a base 23, and the diaphragm 4 is clamped between the upper cover 22 and the base 23. The adjusting cylinder 3, the upper cover 22, the base 23 and the valve seat 1 can be welded together from top to bottom to enhance the connection strength.

[0036] The mounting portion 21 is provided at the top of the upper cover 22, and the base 23 is used to connect with the valve seat 1. Referring to Figure 1 and Figure 3 shown, in an exemplary embodiment of the present disclosure, the plug 32 includes a top plate 321, a steel ball 322 and a steel ball seat 323. Among them, the lower end of the first elastic member 31 cooperates with the top plate 321, the lower end surface of the top plate 321 acts on the steel ball seat 323 through the steel ball 322, and the bottom of the steel ball seat 323 contacts the diaphragm 4; among them, the upper cover 22 has a through opening to enable the plug 32 to pass through from inside the upper cover 22.

[0037] Specifically, for example, a round hole for placing the steel ball 322 is provided at the center of the upper end surface of the steel ball seat 323, a groove for cooperating with the spherical surface of the steel ball 322 protruding from the steel ball seat 323 is provided on the lower end surface of the top plate 321, and a boss can be provided on the upper end surface of the top plate 321 to sleeved the first elastic member 31 through the boss. Exemplarily, in an exemplary embodiment of the present disclosure, referenceFigure 1 As described above, an adjusting nut 33 is provided at the top of the first elastic member 31. The first elastic member 31 abuts against the adjusting nut 33. The adjusting nut 33 can cooperate with an adjusting screw 34. By rotating the adjusting screw 34, the position of the adjusting nut 33 in the adjusting cylinder 3 can be changed, so that the adjusting nut 33 moves up and down in the adjusting cylinder 3, and the compression state of the first elastic member 31 can be changed. That is, it can be used to adjust the opening pressure of the unloading valve.

[0038] In an exemplary embodiment of the present disclosure, referring to Figure 1 and Figure 3 as shown, the mounting portion 21 further includes a fitting section 202. The fitting section 202 is connected to the expansion section 201 and is located on the side close to the diaphragm 4. The radial dimension of the outer wall surface of the fitting section 202 is smaller than the radial dimension of the mounting hole 301, or the radial dimension of the outer wall surface of the fitting section 202 is equal to the radial dimension of the mounting hole 301. Specifically, the mounting portion 21 cooperates with the mounting hole 301 through the fitting section 202, and limits the relative axial displacement of the mounting seat 2 and the adjusting cylinder 3 through the expansion section 201.

[0039] In an exemplary embodiment of the present disclosure, referring to Figure 1 and Figure 3 as shown, the radial dimension of the expansion section 201 gradually increases from the valve seat 1 towards the adjusting cylinder 3. At the position where the expansion section 201 is connected to the fitting section 202, that is, the bottom of the expansion section 201, the radial dimension of the expansion section 201 is the smallest; at the top of the expansion section 201, the radial dimension of the expansion section 201 is the largest. The radial dimension of at least part of the expansion section 201 is larger than the radial dimension of the mounting hole 301. It can be that the radial dimension of the bottom of the expansion section 201 is equal to the radial dimension of the mounting hole 301, and the bottom of the expansion section 201 is clamped in the adjusting cylinder 3; or it can be that the radial dimension of the bottom of the expansion section 201 is smaller than the radial dimension of the mounting hole 301, and the radial dimension of the top of the expansion section 201 is larger than the radial dimension of the mounting hole 301, and the expansion section 201 is clamped in the adjusting cylinder 3 through the middle part between the bottom and the top.

[0040] In an exemplary embodiment of the present disclosure, the radial direction of the expansion section 201 is parallel to the radial direction of the diaphragm 4. Referring to Figure 1 as shown, the expansion direction of the expansion section 201 can be along the radial direction of the diaphragm 4. The radial direction of the diaphragm 4 described in the present disclosure refers to the radial direction of the diaphragm 4 when the mounting seat 2 maintains the diaphragm 4 in a balanced state, for example, in a state without fluid pressure, or in a state where the fluid pressures on both sides of the diaphragm 4 are equal. Exemplarily, the radial direction of the expansion section 201 is parallel to the radial direction of the adjusting cylinder 3.

[0041] In an exemplary embodiment of the present disclosure, referring to Figure 1 and Figure 3As shown, the maximum radial dimension of the expansion section 201 is smaller than the inner diameter of the adjustment cylinder 3. The expansion section 201 does not contact the inner wall of the adjustment cylinder 3, which is beneficial to the smooth formation of the expansion section 201 in the process and is not likely to affect the movement of the top plug 32.

[0042] Specifically, in an exemplary embodiment of the present disclosure, the maximum radius a of the expansion section 201 and the radius b of the mounting hole 301 satisfy a / b≥1.2, which can enable the expansion section 201 to have a good limiting effect. Further, in an exemplary embodiment of the present disclosure, the maximum radius a of the expansion section 201 and the radius b of the mounting hole 301 satisfy (a - b) / b≤1.5.

[0043] Exemplarily, the expansion section 201 can be formed after the mounting portion 21 is inserted into the mounting hole 301 through the fitting section 202. For example, after the mounting portion 21 extends into the mounting hole 301 through the fitting section 202 and enters the interior of the adjustment cylinder 3, the upper cover 22 is expanded and deformed outward by riveting to form the expansion section 201, so as to lock the upper cover 22 and the adjustment cylinder 3.

[0044] In an exemplary embodiment of the present disclosure, the upper cover 22 has a limiting surface 220, the fitting section 202 is connected to the limiting surface 220, and the bottom of the adjustment cylinder 3 abuts against the limiting surface 220. Refer to Figure 1 and Figure 3 As shown, the top limiting surface 220 of the upper cover 22 can be an annular plane, the fitting section 202 protrudes from the top of the upper cover 22, the fitting section 202 can be parallel to the adjustment cylinder 3 and perpendicular to the limiting surface 220 at the top of the upper cover 22. The bottom of the adjustment cylinder 3 abuts against the limiting surface 220, which can make the connection between the adjustment cylinder 3 and the upper cover 22 more firm and stable.

[0045] Exemplarily, the mounting seat 2 is fixedly connected to the adjustment cylinder 3 by welding, and the welding position can be located outside the limiting surface 220, at the position where the bottom of the adjustment cylinder 3 abuts against the limiting surface 220, so as to fix the mounting seat 2 and the adjustment cylinder 3. In an exemplary embodiment of the present disclosure, the welding method between the mounting seat 2 and the adjustment cylinder 3 can adopt orbital welding, making the connection more reliable. In addition, the welding process of the mounting seat 2 and the adjustment cylinder 3 can be located after the formation of the expansion section 201. During the process of orbital welding to weld the adjustment cylinder 3 and the mounting seat 2 into one body, the expansion section 201 can ensure the relative fixation of the mounting seat 2 and the adjustment cylinder 3, having strong connection stability, thereby avoiding the relative position deviation of the two caused by the impact during the welding process, affecting the connection accuracy, and achieving a better welding connection effect.

[0046] Other embodiments of the present disclosure will be readily apparent to those skilled in the art upon consideration of the specification and practice of the utility model disclosed herein. The present disclosure is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include known common general knowledge or conventional technical means in the technical field not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of the present disclosure are pointed out by the appended claims.

[0047] It should be understood that the present disclosure is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of protection of the present disclosure is only limited by the appended claims.

Claims

1. A pressure relief valve, characterized in that, It includes a valve seat (1), a mounting seat (2) and an adjusting cylinder (3). The mounting seat (2) is arranged between the valve seat (1) and the adjusting cylinder (3), and the opposite ends of the mounting seat (2) are respectively connected to the valve seat (1) and the adjusting cylinder (3). A diaphragm (4) is installed in the mounting seat (2). Among them, the adjusting cylinder (3) is provided with a mounting hole (301), and the mounting seat (2) is provided with a mounting portion (21). The mounting portion (21) extends into the adjusting cylinder (3) from the mounting hole (301) and is fixedly connected to the adjusting cylinder (3). The mounting portion (21) has an expansion section (201), and at least part of the radial dimension of the expansion section (201) is larger than the radial dimension of the mounting hole (301).

2. The unloading valve according to claim 1, characterized in that, The mounting seat (2) includes an upper cover (22) and a base (23). The diaphragm (4) is clamped between the upper cover (22) and the base (23). The mounting portion (21) is arranged on the top of the upper cover (22), and the base (23) is used to be connected to the valve seat (1).

3. The unloading valve according to claim 2, wherein, The mounting portion (21) further includes a fitting section (202). The fitting section (202) is connected to the expansion section (201) and is located on the side close to the diaphragm (4). The radial dimension of the outer wall surface of the fitting section (202) is less than or equal to the radial dimension of the mounting hole (301).

4. The unloading valve according to claim 3, characterized in that, The upper cover (22) has a limiting surface (220). The fitting section (202) is connected to the limiting surface (220), and the bottom of the adjusting cylinder (3) abuts against the limiting surface (220).

5. The unloading valve according to claim 4, characterized in that, The mounting seat (2) and the adjusting cylinder (3) are welded and connected outside the limiting surface (220) to fix the mounting seat (2) and the adjusting cylinder (3).

6. The unloading valve according to claim 1, characterized in that, The radial dimension of the expansion section (201) gradually increases from the valve seat (1) to the direction of the adjusting cylinder (3).

7. The unloading valve according to claim 1, characterized in that, The radial direction of the expansion section (201) is parallel to the radial direction of the diaphragm (4).

8. The unloading valve according to claim 1, characterized in that, The maximum value of the radial dimension of the expansion section (201) is less than the inner diameter of the adjusting cylinder (3).

9. The unloading valve according to claim 1, characterized in that, The maximum radius a of the expansion section (201) and the radius b of the mounting hole (301) satisfy a / b≥1.

2.

10. The unloading valve according to claim 2, wherein, The valve seat (1) is provided with a first flow port (101) and a second flow port (102). A valve core (13) is arranged in the valve seat (1). The unloading valve further includes a first elastic member (31) and a plug (32). The first elastic member (31) is located in the adjusting cylinder (3), and the plug (32) is located at one end of the first elastic member (31) close to the valve core (13). The opposite sides of the diaphragm (4) are respectively in contact with the plug (32) and the valve core (13).

11. The unloading valve according to claim 10, characterized in that, The top plug (32) includes a top plate (321), a steel ball (322) and a steel ball seat (323). Among them, the lower end of the first elastic member (31) is matched with the top plate (321), the lower end surface of the top plate (321) acts on the steel ball seat (323) through the steel ball (322), and the bottom of the steel ball seat (323) is in contact with the diaphragm (4); among them, the upper cover (22) has a through opening to enable the top plug (32) to pass out of the upper cover (22).

12. The unloading valve according to claim 10, characterized in that, A second elastic member (14) is sleeved on the outer periphery of the valve core (13), and the second elastic member (14) is used to make the valve core (13) tend to move in the direction of the adjusting cylinder (3).

Images