Check valve facilitating pressure relief

Abstract

The utility model relates to a check valve convenient for pressure relief, which comprises a valve body, a fixing plate is fixed on the inner cavity wall of the valve body, a box body is fixed on the upper surface of the valve body, an installation mechanism is arranged in the box body, a pressure relief mechanism is arranged on the lower surface of the valve body, the installation mechanism comprises an installation component and a check component, and the check component is fixed on the box body. The mounting assembly comprises a top plate attached to the upper surface of the box body. According to the check valve facilitating pressure relief, a pull rod is pulled, a movable plate is driven to move, a second spring is extruded, a vertical plate is inserted into the valve body, then a top plate is pushed leftwards, the pull rod is loosened, the movable plate is reset, a clamping rod is clamped into a clamping groove, the top plate is fixed, and a first baffle abuts against a fixing plate; the first baffle can drive the moving rod to move and extrude the first spring, when no water exists on the left side of the valve body, the first baffle resets and abuts against the fixing plate, replacement is convenient, and the non-return effect can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of check valves, in particular to a check valve which is convenient for pressure relief. Background Art

[0002] A check valve is a valve with a circular disc as the opening and closing part, which blocks the backflow of the medium by its own weight and the pressure of the medium. It is an automatic valve, also known as a non-return valve, a one-way valve, a reflux valve or an isolation valve. The disc movement modes are divided into lift type and swing type. The lift check valve is similar to the stop valve in structure, except that it lacks a valve stem to drive the disc. The medium enters from the inlet end (the swing check valve has a disc that is tilted and can rotate around the axis. The working principle is similar to that of the lift check valve. The check valve is often used as a bottom valve of a pumping device to prevent the backflow of water. The check valve is used in combination with the stop valve to play a role in safety isolation. The disadvantage is that the resistance is large and the sealing is poor when closed.

[0003] For example, a Chinese patent (publication number: CN210770447U) discloses a check valve, comprising a valve body, a triangular bracket and a valve stem extending into the valve body through the triangular bracket, wherein one end of the valve body is an inlet, and the other end is an outlet and connected to the triangular bracket, the triangular bracket has a parallel section connected to the valve body and a vertical section extending into the valve body, the vertical section is located in the middle of the parallel section, a spring is arranged on the outer sleeve of the vertical section, a movement chamber for the valve stem to move up and down is arranged in the middle of the triangular bracket, the valve stem is a reducing rod, and a valve flap is arranged on the top of the triangular bracket, the valve flap and the valve stem are an integral structure, the back of the valve flap is connected to one end of the spring, and the other end of the spring is connected to the parallel section of the triangular bracket, and a damping hole is arranged on the parallel section of the triangular bracket near the movement chamber. The utility model has a simple structure and a reasonable design; the damping hole is provided to control the switching speed of the valve flap, so as to play a buffering and shock absorbing function to prevent the valve flap from vibrating during switching and affecting the non-return effect of the check valve.

[0004] The above-mentioned check valve still has certain shortcomings. The opening and closing speed of the valve disc is controlled by setting a damping hole to play a buffering and shock-absorbing function to prevent the valve disc from vibrating when opening and closing and affecting the checking effect of the check valve. However, in order to ensure the sealing between the valve disc and the valve hole, a rubber seal is installed on the valve disc. As the use time increases, the rubber seal will age and deform, resulting in a loose seal between the valve disc and the valve hole. In order to ensure the sealing of the valve disc, the aged rubber seal needs to be replaced. The valve disc is located inside the valve body, which is inconvenient to disassemble and is time-consuming and labor-intensive, which increases the difficulty of replacing the rubber seal. Therefore, the present application proposes a check valve that is convenient for pressure relief to solve the above-mentioned problems. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a check valve for convenient pressure relief, which has the advantages of being easy to disassemble and replace, and solves the problem that the existing check valve for convenient pressure relief is inconvenient to disassemble and replace.

[0006] To achieve the above object, the utility model provides the following technical solution: a check valve for convenient pressure relief, comprising a valve body, a fixing plate is fixed to the inner cavity wall of the valve body, a box is fixed to the upper surface of the valve body, a mounting mechanism is provided inside the box, and a pressure relief mechanism is provided on the lower surface of the valve body;

[0007] The mounting mechanism includes a mounting assembly and a non-return assembly, the mounting assembly includes a top plate attached to the upper surface of the box body, a card slot is provided on the lower surface of the top plate, the mounting assembly also includes a cavity provided inside the box body, a first telescopic rod is fixed to the lower surface of the cavity, a second spring is sleeved on the outer surface of the first telescopic rod, a movable plate is fixed to the upper surface of the first telescopic rod, a pull rod penetrating and extending to the right side of the box body is fixed to the right side of the movable plate, and a card rod is fixed to the upper surface of the movable plate.

[0008] Furthermore, the non-return assembly includes a vertical plate fixed to the lower surface of the top plate, a through hole is opened on the left side of the vertical plate, a moving rod is slidably connected inside the through hole, a first spring is sleeved on the outer surface of the moving rod, and a first baffle is fixed on the left side of the moving rod.

[0009] Furthermore, the upper surface of the second spring is fixed to the lower surface of the moving plate, and the lower surface of the second spring is fixed to the lower surface of the inner cavity of the cavity.

[0010] Furthermore, the clamping rod is slidably connected to the inside of the clamping slot, a sliding hole is opened on the right side of the box body, and the pull rod is slidably connected to the inside of the sliding hole.

[0011] Furthermore, a vertical block is fixed on the lower surface of the top plate, an insertion rod is fixed on the left side of the vertical block, a slot is opened on the left side of the inner cavity of the box body, and the insertion rod is slidably connected to the inside of the slot.

[0012] Furthermore, the left side of the first spring is fixed to the right side of the first baffle, and the right side of the first spring is fixed to the left side of the vertical plate.

[0013] Furthermore, the pressure relief mechanism includes a shell fixed to the lower surface of the valve body, a second telescopic rod and a partition are fixed to the lower surface of the inner cavity of the shell, a third spring is sleeved on the outer surface of the second telescopic rod, and a second baffle is fixed to the upper surface of the second telescopic rod.

[0014] Furthermore, the upper surface of the third spring is fixed to the lower surface of the second baffle, and the lower surface of the third spring is fixed to the lower surface of the inner cavity of the shell.

[0015] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0016] 1. The check valve which is convenient for pressure relief has an installation mechanism, and pulls the pull rod to drive the movable plate to move and squeeze the second spring, inserts the vertical plate into the valve body, and then pushes the top plate to the left, releases the pull rod, and the movable plate is reset, and the clamping rod is clamped into the clamping groove to fix the top plate, and the first baffle plate abuts against the fixed plate. When water enters through the left side of the valve body, the first baffle plate is pushed to move, and the first baffle plate will drive the movable rod to move and squeeze the first spring. When there is no water on the left side of the valve body, the first baffle plate is reset and abuts against the fixed plate, which is not only convenient for replacement, but also can play a check role.

[0017] 2. The check valve with convenient pressure relief has a pressure relief mechanism. When the pressure on the left side of the fixed plate inside the valve body is less than the pressure on the right side of the fixed plate inside the valve body, the water on the right side will squeeze the second baffle and the third spring under the action of pressure, and the water will enter the left side of the inner cavity of the shell through the connecting hole and enter the left side of the fixed plate. The pressure of the water on the right side of the fixed plate is reduced, and the second baffle is reset to prevent water from entering the left side of the inner cavity of the shell, thereby playing a role of pressure relief and preventing the different pressures inside the valve body from affecting the water inlet. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the utility model;

[0019] Figure 2 This is a three-dimensional appearance diagram of the utility model;

[0020] Figure 3 It is a structural schematic diagram of the installation mechanism of the utility model;

[0021] Figure 4 For this utility model Figure 3 A schematic diagram of the enlarged structure at A in the middle;

[0022] Figure 5 It is a structural schematic diagram of the pressure relief mechanism of the utility model.

[0023] In the figure: 1 valve body, 2 mounting mechanism, 201 top plate, 202 vertical plate, 203 through hole, 204 moving rod, 205 first spring, 206 first baffle, 207 cavity, 208 first telescopic rod, 209 second spring, 210 moving plate, 211 pull rod, 212 clamping rod, 213 clamping groove, 3 box body, 4 fixing plate, 5 pressure relief mechanism, 501 shell, 502 second telescopic rod, 503 third spring, 504 second baffle, 505 partition. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figure 1-2 In this embodiment, a check valve that is convenient for pressure relief includes a valve body 1. A fixing plate 4 is fixed to the inner cavity wall of the valve body 1. A box body 3 is fixed to the upper surface of the valve body 1. An installation mechanism 2 is provided inside the box body 3 for easy replacement and to play a check role. A pressure relief mechanism 5 is provided on the lower surface of the valve body 1 for releasing pressure and preventing water from entering.

[0026] See also Figure 3-4 In order to facilitate replacement, the mounting mechanism 2 in this embodiment includes a mounting assembly and a check assembly. The mounting assembly includes a top plate 201 attached to the upper surface of the box body 3, and a card slot 213 is provided on the lower surface of the top plate 201. The mounting assembly also includes a cavity 207 opened in the box body 3. A first telescopic rod 208 is fixed to the lower surface of the inner cavity of the cavity 207. A second spring 209 is sleeved on the outer surface of the first telescopic rod 208. The second spring 209 is made to perform a linear compression movement through the first telescopic rod 208. A moving plate 210 is fixed to the upper surface of the first telescopic rod 208. The moving plate 210 is made to perform a linear compression movement through the first telescopic rod 208. A pull rod 211 that penetrates and extends to the right side of the box body 3 is fixed to the right side of the moving plate 210. A card rod 212 is fixed to the upper surface of the moving plate 210. By pulling the pull rod 211, the moving plate 210 and the card rod 212 are driven to move together.

[0027] The check assembly includes a vertical plate 202 fixed to the lower surface of the top plate 201, a through hole 203 is opened on the left side of the vertical plate 202, a moving rod 204 is slidably connected inside the through hole 203, a first spring 205 is sleeved on the outer surface of the moving rod 204, and a first baffle 206 is fixed to the left side of the moving rod 204. The moving rod 204 and the first baffle 206 are reset by the first spring 205, so that the first baffle 206 abuts against the fixed plate 4, so that the valve body 1 plays a check role.

[0028] Among them, the card rod 212 is slidably connected to the inside of the card slot 213, the upper surface of the second spring 209 is fixed to the lower surface of the movable plate 210, and the lower surface of the second spring 209 is fixed to the lower surface of the inner cavity of the cavity 207. The movable plate 210 is reset by the second spring 209, driving the card rod 212 to move, so that the card rod 212 is stuck in the inside of the card slot 213 to fix the top plate 201. A T-shaped block is fixed to the lower surface of the top plate 201, and a T-shaped slot is opened on the right side of the box body 3. The T-shaped block is slidably connected to the inside of the T-shaped slot to increase the stability of the top plate 201 when moving.

[0029] In addition, a sliding hole is opened on the right side of the box body 3, and the pull rod 211 is slidably connected to the inside of the sliding hole, so that the pull rod 211 can drive the movable plate 210 to move. A vertical block is fixed on the lower surface of the top plate 201, and an insertion rod is fixed on the left side of the vertical block. A slot is opened on the left side of the inner cavity of the box body 3, and the insertion rod is slidably connected to the inside of the slot, which is used to improve the stability and sealing of the top plate 201 during installation.

[0030] In addition, the left side of the first spring 205 is fixed to the right side of the first baffle 206, and the right side of the first spring 205 is fixed to the left side of the vertical plate 202. When water enters through the left side of the valve body 1, it will push the first baffle 206 to move, and the first baffle 206 will drive the moving rod 204 to slide inside the through hole 203 and squeeze the first spring 205. The limiting rod will slide in the limiting hole to increase the stability of the first baffle 206 when it moves. When there is no water on the left side of the valve body 1, the first baffle 206 will reset under the action of the first spring 205 and abut against the fixed plate 4 to play a check role. Two limiting holes are opened on the left side of the vertical plate 202, and two limiting rods are fixed on the right side of the first baffle 206. The limiting rods are slidably connected to the inside of the limiting hole to increase the stability of the first baffle 206 when it moves.

[0031] The installation mechanism 2 in this embodiment pulls the pull rod 211 to drive the movable plate 210 to move and squeeze the second spring 209, inserts the vertical plate 202 into the valve body 1, and then pushes the top plate 201 to the left, releases the pull rod 211, and the movable plate 210 is reset. The clamping rod 212 is clamped into the clamping groove 213 to fix the top plate 201, and the first baffle plate 206 is in contact with the fixed plate 4. When water enters through the left side of the valve body 1, the first baffle plate 206 is pushed to move, and the first baffle plate 206 will drive the movable rod 204 to move and squeeze the first spring 205. When there is no water on the left side of the valve body 1, the first baffle plate 206 is reset and abuts against the fixed plate 4 to play a non-return role.

[0032] See also Figure 5In order to release pressure, the pressure relief mechanism 5 in this embodiment includes a shell 501 fixed to the lower surface of the valve body 1, a second telescopic rod 502 and a partition 505 are fixed to the lower surface of the inner cavity of the shell 501, a third spring 503 is sleeved on the outer surface of the second telescopic rod 502, a second baffle 504 is fixed on the upper surface of the second telescopic rod 502, and the second baffle 504 is reset by the third spring 503.

[0033] Among them, the upper surface of the third spring 503 is fixed to the lower surface of the second baffle 504, and the lower surface of the third spring 503 is fixed to the lower surface of the inner cavity of the shell 501. When the pressure is released, the second baffle 504 is reset by the third spring 503 to prevent water on the right side of the inner cavity of the valve body 1 from entering the left side of the inner cavity of the valve body 1.

[0034] In addition, a connecting hole is opened on the left side of the partition 505 to facilitate the water on the right side of the partition 505 to enter the left side of the partition 505. Two water holes are opened on the lower surface of the valve body 1. The water on the right side of the inner cavity of the valve body 1 will enter the shell 501 through the water hole on the right and enter the valve body 1 through the water hole on the left.

[0035] In the pressure relief mechanism 5 of this embodiment, when the pressure on the left side of the fixed plate 4 inside the valve body 1 is less than the pressure on the right side of the fixed plate 4 inside the valve body 1, the water on the right side will squeeze the second baffle 504 and the third spring 503 under the action of pressure, and the water will enter the left side of the inner cavity of the shell 501 through the connecting hole, and enter the left side of the fixed plate 4. The pressure of the water on the right side of the fixed plate 4 is reduced, and the second baffle 504 is reset to prevent water from entering the left side of the inner cavity of the shell 501, thereby playing a role in pressure relief.

[0036] The working principle of the above embodiment is:

[0037] (1) When installation is required, pull the pull rod 211, and the pull rod 211 drives the movable plate 210 to move in the cavity 207. The movable plate 210 will squeeze the second spring 209 and the first telescopic rod 208. At this time, insert the vertical plate 202 into the valve body 1, and then push the top plate 201 to the left, so that the insertion rod under the top plate 201 is inserted into the slot, and the top plate 201 is limited. At this time, release the pull rod 211, and the movable plate 210 will reset under the action of the second spring 209, driving the clamping rod 212 to clamp into the inside of the clamping slot 213. , fix the top plate 201. At this time, the first baffle 206 will abut against the fixed plate 4. When water enters through the left side of the valve body 1, it will push the first baffle 206 to move. The first baffle 206 will drive the moving rod 204 to slide inside the through hole 203 and squeeze the first spring 205. The limiting rod will slide in the limiting hole to increase the stability of the first baffle 206 when moving. When there is no water on the left side of the valve body 1, the first baffle 206 will reset under the action of the first spring 205 and abut against the fixed plate 4 to play a non-return role.

[0038] (2) When the pressure on the left side of the fixed plate 4 inside the valve body 1 is less than the pressure on the right side of the fixed plate 4 inside the valve body 1, the water on the right side will squeeze the second baffle 504 and the third spring 503 under the action of pressure. During the downward movement of the second baffle 504, water will enter the left side of the inner cavity of the shell 501 through the connecting hole and enter the left side of the fixed plate 4. At this time, the pressure of the water on the right side of the fixed plate 4 is reduced, and the second baffle 504 will be reset under the action of the third spring 503 to prevent water from entering the left side of the inner cavity of the shell 501, thereby playing a role in pressure relief.

[0039] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0040] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A check valve for convenient pressure relief, comprising a valve body (1), characterized in that: A fixing plate (4) is fixed to the inner cavity wall of the valve body (1), a box body (3) is fixed to the upper surface of the valve body (1), a mounting mechanism (2) is provided inside the box body (3), and a pressure relief mechanism (5) is provided on the lower surface of the valve body (1); The mounting mechanism (2) comprises a mounting assembly and a non-return assembly, wherein the mounting assembly comprises a top plate (201) attached to the upper surface of the box body (3), the lower surface of the top plate (201) being provided with a card slot (213), the mounting assembly further comprising a cavity (207) provided inside the box body (3), a first telescopic rod (208) being fixed to the lower surface of the inner cavity of the cavity (207), a second spring (209) being sleeved on the outer surface of the first telescopic rod (208), a movable plate (210) being fixed to the upper surface of the first telescopic rod (208), a pull rod (211) penetrating through and extending to the right side of the box body (3) being fixed to the right side of the movable plate (210), and a card rod (212) being fixed to the upper surface of the movable plate (210).

2. A check valve for convenient pressure relief according to claim 1, characterized in that: The non-return assembly comprises a vertical plate (202) fixed to the lower surface of the top plate (201), a through hole (203) is opened on the left side of the vertical plate (202), a moving rod (204) is slidably connected inside the through hole (203), a first spring (205) is sleeved on the outer surface of the moving rod (204), and a first baffle (206) is fixed on the left side of the moving rod (204).

3. A check valve for convenient pressure relief according to claim 1, characterized in that: The upper surface of the second spring (209) is fixed to the lower surface of the moving plate (210), and the lower surface of the second spring (209) is fixed to the lower surface of the inner cavity of the cavity (207).

4. A check valve for convenient pressure relief according to claim 1, characterized in that: The clamping rod (212) is slidably connected to the inside of the clamping slot (213); a sliding hole is provided on the right side of the box body (3); and the pull rod (211) is slidably connected to the inside of the sliding hole.

5. A check valve for convenient pressure relief according to claim 1, characterized in that: A vertical block is fixed on the lower surface of the top plate (201), an insertion rod is fixed on the left side of the vertical block, a slot is opened on the left side of the inner cavity of the box body (3), and the insertion rod is slidably connected to the inside of the slot.

6. A check valve for convenient pressure relief according to claim 2, characterized in that: The left side of the first spring (205) is fixed to the right side of the first baffle (206), and the right side of the first spring (205) is fixed to the left side of the vertical plate (202).

7. A check valve for convenient pressure relief according to claim 1, characterized in that: The pressure relief mechanism (5) comprises a shell (501) fixed to the lower surface of the valve body (1); a second telescopic rod (502) and a partition plate (505) are fixed to the lower surface of the inner cavity of the shell (501); a third spring (503) is sleeved on the outer surface of the second telescopic rod (502); and a second baffle plate (504) is fixed to the upper surface of the second telescopic rod (502).

8. A check valve for convenient pressure relief according to claim 7, characterized in that: The upper surface of the third spring (503) is fixed to the lower surface of the second baffle (504), and the lower surface of the third spring (503) is fixed to the lower surface of the inner cavity of the shell (501).

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