Middle-high pressure relief valve

Abstract

The utility model discloses a middle-high pressure relief valve which comprises a valve body and a valve core, the valve core is arranged in the valve body, the middle-high pressure relief valve further comprises an extrusion spring, the extrusion spring is arranged on the outer wall of the valve core and used for pushing the valve core, the cap is arranged at one end of the valve body and used for limiting movement of the valve core, and an end cover is arranged at the other end of the valve body and used for limiting movement of the valve core. The end cover is arranged at one end of the cover cap, the end cover is used for limiting movement of the cover cap, the fixing ring is arranged at one end of the valve body, and the fixing ring is used for installing the end cover. By means of the design of the end cover and the fixing ring, the fixing ring is fixedly connected with the end, close to the cover cap, of the valve body, the end cover is limited between the valve body and the fixing ring, the cover cap is blocked, when the cover cap is used for a long time and rotates, the cover cap cannot move out of the valve body under the limitation of the end cover, and the valve body is protected. The limiting effect of the cap on the extrusion spring is guaranteed, and the extrusion spring keeps extruding the valve element.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure relief valves, and particularly relates to a medium-high pressure relief valve. Background Art

[0002] When the pressure relief valve is working, the medium mainly pushes the valve core, causing a gap between the valve core and the valve body. Thus, the medium flows into the interior of the valve body from the gap and then discharges from the discharge port of the valve body. When the pressure of the medium on the valve core weakens, the spring will push the valve core to eliminate the gap between the valve core and the valve body, thereby achieving the function of maintaining the internal pressure of the system. When the valve core and the spring are installed, a cap is installed at one end of the valve body to limit the movement of the spring, so that the cap and the valve core squeeze the spring. The connection between the cap and the valve body usually adopts a threaded connection. Under the long-term pushing action of the medium or the spring, the cap will gradually rotate and loosen, causing the cap to gradually move out of the valve body, resulting in a smaller extrusion force on the spring, a weakened acting force of the spring on the valve core, affecting the seal between the valve core and the valve body, and further causing a decrease in the internal pressure of the system. Content of the Utility Model

[0003] The purpose of the utility model is to provide a medium-high pressure relief valve to solve the problems raised in the above background art.

[0004] To achieve the above purpose, the utility model provides the following technical scheme: a medium-high pressure relief valve, including a valve body and a valve core, the valve core is arranged inside the valve body, and further includes:

[0005] An extrusion spring, the extrusion spring is arranged on the outer wall of the valve core, and the extrusion spring is used to push the valve core;

[0006] A cap, the cap is arranged at one end of the valve body, and the cap is used to limit the movement of the valve core;

[0007] An end cover, the end cover is arranged at one end of the cap, and the end cover is used to limit the movement of the cap;

[0008] A fixing ring, the fixing ring is arranged at one end of the valve body, and the fixing ring is used for the installation of the end cover.

[0009] Preferably, one side of the fixing ring is fixedly connected to one end of the valve body, the end cover is arranged between the opposite sides of the valve body and the fixing ring, the vertical cross-section of the fixing ring is in a hook shape, and a pressure relief port is arranged on one side of the end cover.

[0010] Preferably, a feed port for the medium to enter is arranged at the other end of the valve body, and a discharge port for the medium to discharge is arranged at the top of the valve body.

[0011] Preferably, a filter screen for filtering medium debris is fixedly connected inside the feed port.

[0012] Preferably, an installation cavity for installing a valve core is formed inside the valve body, and the feed inlet and the discharge outlet are respectively and communicatively connected to the installation cavity.

[0013] Preferably, an assembly thread is provided at one end of the inner wall of the installation cavity, and an installation thread is provided on the outer wall of the cap, and the assembly thread and the installation thread are engaged with each other.

[0014] Preferably, the compression spring is sleeved on the outer wall of the valve core, a groove for installing the compression spring is provided at one end of the cap, an insertion hole for slidably inserting and connecting the valve core is provided at the other end of the cap, and a rotation groove for rotating the cap is provided at the other end of the cap.

[0015] Technical effects and advantages of the present utility model:

[0016] With the design of the end cap and the fixing ring, the fixing ring is fixedly connected to one end of the valve body close to the cap, so that the end cap is restricted between the valve body and the fixing ring, thereby forming a block for the cap. When the cap is used for a long time and rotates, under the restriction of the end cap, the cap cannot be removed from the valve body, so that the restricting effect of the cap on the compression spring can be ensured, and the compression spring can keep pressing on the valve core. Description of the drawings

[0017] Figure 1 It is the first overall three-dimensional structure diagram of the present utility model.

[0018] Figure 2 It is the second overall three-dimensional structure diagram of the present utility model.

[0019] Figure 3 It is the overall front view sectional structure diagram of the present utility model.

[0020] Figure 4 It is the three-dimensional structure diagram of the cap of the present utility model.

[0021] In the figure: 1, valve body; 2, feed inlet; 3, discharge outlet; 4, valve core; 5, compression spring; 6, cap; 7, end cap; 8, fixing ring; 9, pressure relief port; 10, rotation groove; 11, filter screen. Detailed implementation manners

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0023] The present utility model provides a medium and high pressure relief valve as Figures 1-4 shown, which includes a valve body 1 and a valve core 4. The valve core 4 is arranged inside the valve body 1, and further includes:

[0024] A compression spring 5 is arranged on the outer wall of the valve core 4 and is used to push the valve core 4;

[0025] A cap 6 is arranged at one end of the valve body 1 and is used to limit the movement of the valve core 4;

[0026] An end cover 7 is arranged at one end of the cap 6 and is used to limit the movement of the cap 6;

[0027] A fixing ring 8 is arranged at one end of the valve body 1 and is used for the installation of the end cover 7.

[0028] Specifically, one side of the fixing ring 8 is fixedly connected to one end of the valve body 1. The end cover 7 is arranged between the opposite sides of the valve body 1 and the fixing ring 8. The vertical cross-section of the fixing ring 8 is in a hook shape, and a relief port 9 is opened on one side of the end cover 7.

[0029] Furthermore, the fixing ring 8 is a metal ring. A placement groove is opened on the side of the fixing ring 8 facing the valve body 1. The size of the placement groove is adapted to the end cover 7. The part of the fixing ring 8 in contact with the valve body 1 is fixed by welding, so as to limit the end cover 7 between the fixing ring 8 and the valve body 1. The relief port 9 opened on one side of the end cover 7 is used to assist in the pressure relief inside the installation cavity. The size of the relief port 9 is 1.1 times the size of the insertion hole. The end cover 7 is a metal disc, so that the end cover 7 plays a role in restricting and blocking the cap 6, preventing the cap 6 from screwing out of the valve body 1 and causing a change in the elastic force of the compression spring 5.

[0030] Specifically, a feed port 2 for the medium to enter is opened at the other end of the valve body 1, and a discharge port 3 for the medium to discharge is opened at the top of the valve body 1. A filter screen 11 for filtering the impurities in the medium is fixedly connected inside the feed port 2. An installation cavity for installing the valve core 4 is opened inside the valve body 1. The feed port 2 and the discharge port 3 are respectively connected to the installation cavity in a through manner.

[0031] Furthermore, the filter screen 11 is a copper filter screen and is used to filter the powder contained in the medium. The size of the filter holes of the filter screen 11 is set according to actual needs. The outer wall of the filter screen 11 is fixedly connected to the inner wall of the feed port 2. The medium can be liquid or gas. The medium flows in from the feed port 2, enters the installation cavity, and then flows out from the discharge port 3.

[0032] Specifically, an assembly thread is provided at one end of the inner wall of the installation cavity, and an installation thread is provided on the outer wall of the cap 6. The assembly thread and the installation thread are meshed with each other. The compression spring 5 is sleeved on the outer wall of the valve core 4. A groove for installing the compression spring 5 is provided at one end of the cap 6. An insertion hole for slidably inserting and connecting the valve core 4 is provided at the other end of the cap 6. A rotation groove 10 for rotating the cap 6 is provided at the other end of the cap 6.

[0033] Furthermore, the length of the assembly thread corresponds to the length of the installation thread. The valve core 4 is in the shape of a screw. A sealing block is provided at one end of the valve core 4 close to the filter screen 11. Both ends of the compression spring 5 are in close contact with the inner wall of the groove of the cap 6 and one end of the valve core 4 close to the filter screen 11. The size of the insertion hole of the cap 6 is 1.05 times the size of the end of the valve core 4 away from the filter screen 11. When the cap 6 is rotated to make the cap 6 meshed with the inner wall thread of the valve body 1 and the cap 6 completely enters the valve body 1, the cap 6 and the valve core 4 interact with each other, so that the valve core 4 is always in a compressed state. Thus, the cap 6 cannot move under the action of the thread meshing with the valve body 1, and the restoring force of the compression spring 5 pushes the valve core 4, driving the valve core 4 and the sealing block to squeeze the side of the installation cavity close to the filter screen 11 to form a seal. When the medium pressure is greater than the restoring force of the compression spring 5, it pushes the valve core 4 to move towards the end cover 7, opening the feed port 2 of the valve body 1. The medium flows into the installation cavity and then flows out through the discharge port 3. When the medium pressure is less than the restoring force of the compression spring 5, the compression spring 5 pushes the valve core 4 to move towards the filter screen 11, closing the feed port 2 again. The rotation groove 10 is used for inserting a tool to rotate the cap 6.

[0034] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A medium- and high-pressure pressure relief valve, comprising a valve body (1) and a valve core (4), wherein the valve core (4) is arranged inside the valve body (1), and is characterized in that: Also includes: A squeezing spring (5), wherein the squeezing spring (5) is arranged on the outer wall of the valve core (4), and the squeezing spring (5) is used to push the valve core (4); A cover cap (6), the cover cap (6) being arranged at one end of the valve body (1), and the cover cap (6) being used to limit the movement of the valve core (4); An end cover (7), the end cover (7) being arranged at one end of the cover cap (6), and the end cover (7) being used to limit the movement of the cover cap (6); A fixing ring (8), wherein the fixing ring (8) is arranged at one end of the valve body (1), and the fixing ring (8) is used for installing the end cover (7).

2. A medium- and high-pressure relief valve according to claim 1, characterized in that: One side of the fixing ring (8) is fixedly connected to one end of the valve body (1), the end cover (7) is arranged between the valve body (1) and the opposite side of the fixing ring (8), the vertical cross-section of the fixing ring (8) is in the shape of a curved hook, and one side of the end cover (7) is provided with a pressure relief port (9).

3. A medium- and high-pressure relief valve according to claim 1, characterized in that: The other end of the valve body (1) is provided with an inlet (2) for medium to enter, and the top end of the valve body (1) is provided with an outlet (3) for medium to discharge.

4. A medium- and high-pressure relief valve according to claim 3, characterized in that: A filter screen (11) for filtering medium impurities is fixedly connected inside the feed port (2).

5. A medium- and high-pressure relief valve according to claim 3, characterized in that: The valve body (1) is provided with an installation cavity for installing a valve core (4), and the feed inlet (2) and the discharge outlet (3) are respectively connected to the installation cavity.

6. A medium- and high-pressure relief valve according to claim 5, characterized in that: An assembly thread is provided at one end of the inner wall of the installation cavity, and an installation thread is provided at the outer wall of the cover cap (6), and the assembly thread and the installation thread are meshed with each other.

7. A medium- and high-pressure relief valve according to claim 1, characterized in that: The extrusion spring (5) is sleeved on the outer wall of the valve core (4); one end of the cover cap (6) is provided with a groove for installing the extrusion spring (5); the other end of the cover cap (6) is provided with an insertion hole for slidingly inserting and connecting the valve core (4); and the other end of the cover cap (6) is provided with a rotation groove (10) for rotating the cover cap (6).

Images