High-performance zero-leakage axial-flow type check valve

Abstract

The utility model discloses a high-performance zero-leakage axial-flow type check valve which comprises a valve body. The non-return mechanism comprises a connecting strip fixedly connected between the front inner wall and the rear inner wall of the valve body, a fixing plate is fixedly connected to the left side of the connecting strip, a piston cylinder is fixedly connected to the left side of the fixing plate, a piston plate capable of sliding left and right is arranged in the piston cylinder, and a spring is fixedly connected to the left side of the piston plate. The left side of the spring penetrates through the piston cylinder and is fixedly connected with a sealing plate, and a contact ring is fixedly connected to the inner wall of the left side part of the valve body. And an elastic adjustment mechanism for changing the opening pressure of the sealing plate. According to the check valve, through the arrangement of the sealing ring, the connection sealing performance can be guaranteed, and in addition, through the arrangement of the columnar piston block and the piston plate, opening pressure adjustment can be achieved on the basis that the front side part of the valve body is not opened.

Description

Technical Field

[0001] The utility model relates to the technical field of check valves, in particular to a high-performance zero-leakage axial flow check valve. Background Art

[0002] When many axial flow check valves on the market are in use, the connection between the connecting pipe and the valve body will cause leakage due to insufficient sealing, and the opening pressure of the valve is generally fixed, which is not convenient for adjustment. Therefore, a high-performance zero-leakage axial flow check valve is proposed to address the above problems;

[0003] To this end, the utility model patent with publication number CN218582346U discloses a high-performance zero-leakage axial flow check valve, including a valve body, a connecting pipe and an anti-leakage mechanism arranged on the surface of the valve body, the connecting pipe is fitted inside the valve body, and the anti-leakage mechanism includes a transmission assembly and an anti-leakage assembly; the transmission assembly includes a mounting rod, a swing plate and a transmission rod, the mounting rod is fixedly connected to the top of the valve body, the surface of the mounting rod is rotatably connected with the swing plate, the surface of the swing plate is fixedly connected with the transmission rod, and by setting a spring, when the opening pressure of the valve needs to be adjusted, the screw can be removed from the disassembly plate, and then the disassembly plate is separated from the valve body, at this time, the second nut can be rotated, and the second nut will move to the right along the connecting rod, at this time, the spring will become sparse due to the reduced extrusion force, and the movement resistance of the interception block will change accordingly, thereby achieving the purpose of adjusting the opening pressure;

[0004] However, during actual use, we found that when the check valve is used, when adjusting the opening pressure, the front part of the valve body needs to be removed each time. Such operation is obviously troublesome, so how to solve this problem needs to be considered. Utility Model Content

[0005] The purpose of the utility model is to solve the shortcomings existing in the prior art and to propose a high-performance zero-leakage axial flow check valve. The check valve can ensure the sealing of the connection through the setting of a sealing ring. In addition, through the setting of a columnar piston block and a piston plate, the opening pressure adjustment can be achieved without opening the front part of the valve body.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A high-performance zero-leakage axial flow check valve comprises a valve body; a check mechanism, the check mechanism comprising a connecting strip fixedly connected between the front and rear inner walls of the valve body, a fixing plate fixedly connected to the left side of the connecting strip, a piston cylinder fixedly connected to the left side of the fixing plate, a piston plate slidable left and right is arranged in the piston cylinder, a spring fixedly connected to the left side of the piston plate, the left side of the spring passes through the piston cylinder and is fixedly connected to a sealing plate, a contact ring is fixedly connected to the inner wall of the left part of the valve body; an elastic adjustment mechanism, the elastic adjustment is used to change the opening pressure of the sealing plate.

[0008] Preferably, the sealing plate is a truncated cone structure and cooperates with the contact ring.

[0009] Preferably, a plurality of first guide rods are fixedly connected to the right side of the sealing plate, and the plurality of first guide rods all penetrate the fixing plate and are slidably connected to the fixing plate.

[0010] Preferably, the outer sides of the left and right sides of the valve body are fixedly connected with mounting rings, and each mounting ring is installed with a sealing ring.

[0011] Preferably, the elastic adjustment mechanism includes a rectangular bar fixedly connected to the upper end of the valve body, a columnar cavity is provided in the rectangular bar, a columnar piston block which can slide up and down is provided in the columnar cavity, a screw is penetrated through the inner top of the columnar cavity, the screw is rotatably connected to the inner top of the columnar cavity, a threaded groove is vertically penetrated on the columnar piston block, the lower end of the screw extends into the threaded groove and is threadedly connected to the inner wall of the threaded groove, the bottom space of the columnar cavity, the right side space of the piston cylinder and the connecting pipe are filled with hydraulic oil, and the upper end of the screw is fixedly connected to a torsion plate.

[0012] Preferably, two second guide rods are symmetrically fixedly connected to the upper end of the columnar piston block, and the upper ends of the two second guide rods both penetrate the inner top of the columnar cavity.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] It is provided with structures such as a piston cylinder, a piston plate, a columnar piston block and hydraulic oil. In actual use, when the opening pressure needs to be adjusted, it is only necessary to twist the screw. After the screw is twisted, the force of the hydraulic oil is transmitted, which will eventually compress and extend the spring to adjust the opening pressure. Compared with the existing technology, when adjusting the opening pressure, the operation is simpler, which facilitates the adjustment work of the staff. In addition, when adjusting, there is no need to clear the water in the valve body, that is, it can be adjusted when the valve body is working, and there are many usage scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1This is a structural schematic diagram of a high-performance zero-leakage axial flow check valve proposed by the utility model;

[0016] Figure 2 for Figure 1 Schematic cross-sectional view of ;

[0017] Figure 3 for Figure 1 A schematic cross-sectional view of a rectangular strip;

[0018] Figure 4 Schematic diagram of the internal structure of the valve body.

[0019] In the figure: 1 valve body, 2 rectangular strip, 3 mounting ring, 4 contact ring, 5 sealing plate, 6 connecting strip, 7 fixing plate, 8 first guide rod, 9 piston cylinder, 10 piston plate, 11 spring, 12 connecting pipe, 13 columnar piston block, 14 screw rod, 15 second guide rod, 16 sealing ring. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0021] Reference Figure 1-4 , a high-performance zero-leakage axial flow check valve, comprising a valve body 1;

[0022] Among them, it also includes a check mechanism, which includes a connecting strip 6 fixedly connected between the front and rear inner walls of the valve body 1, a fixing plate 7 fixedly connected to the left side of the connecting strip 6, a piston cylinder 9 fixedly connected to the left side of the fixing plate 7, a piston plate 10 that can slide left and right is arranged in the piston cylinder 9, a spring 11 fixedly connected to the left side of the piston plate 10, the left side of the spring 11 penetrates the piston cylinder 9 and is fixedly connected to a sealing plate 5, a contact ring 4 is fixedly connected to the inner wall of the left part of the valve body 1, the sealing plate 5 is a truncated cone structure and cooperates with the contact ring 4, a plurality of first guide rods 8 are fixedly connected to the right side of the sealing plate 5, the plurality of first guide rods 8 all penetrate the fixing plate 7 and are slidably connected to the fixing plate 7;

[0023] The outer sides of the left and right sides of the valve body 1 are fixedly connected with mounting rings 3, and each mounting ring 3 is installed with a sealing ring 16, which can ensure the sealing performance after installation;

[0024] Among them, it also includes an elastic adjustment mechanism, and the elastic adjustment is used to change the opening pressure of the sealing plate 5. The elastic adjustment mechanism includes a rectangular strip 2 fixedly connected to the upper end of the valve body 1, and a columnar cavity is arranged in the rectangular strip 2, and a columnar piston block 13 that can slide up and down is arranged in the columnar cavity. A screw 14 is penetrated through the inner top of the columnar cavity, and the screw 14 is rotatably connected to the inner top of the columnar cavity. A threaded groove is vertically penetrated on the columnar piston block 13, and the lower end of the screw 14 extends into the threaded groove and is threadedly connected to the inner wall of the threaded groove. The bottom space of the columnar cavity, the right side space of the piston cylinder 9 and the connecting pipe 12 are filled with hydraulic oil. The upper end of the screw 14 is fixedly connected to a torsion plate, and the upper end of the columnar piston block 13 is symmetrically fixedly connected to two second guide rods 15, and the upper ends of the two second guide rods 15 both penetrate the inner top of the columnar cavity.

[0025] In the utility model, when in use, the initial spring 11 is in a compressed position, and the opening pressure is in a medium state. The sealing ring 16 can ensure the sealing after installation. When the opening pressure of the sealing plate 5 needs to be adjusted, the opening pressure needs to be increased, and the screw rod 14 is twisted to move the columnar piston block 13 downward. The columnar piston block 13 presses the hydraulic oil at the bottom of the columnar cavity into the right side space of the piston cylinder 9, pushing the piston plate 10 to move left, so that the spring 11 is compressed to a greater extent, so that the opening pressure is increased. When the opening pressure needs to be reduced, the screw rod 14 is twisted in the opposite direction to draw the hydraulic oil in the right side space of the piston cylinder 9 into the bottom space of the columnar cavity, so that the piston plate 10 moves right, thereby allowing the spring 11 to extend a little distance (still in a compressed state), and the opening pressure at this time is reduced.

[0026] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. High performance zero leakage axial flow check valve, characterized by: include: Valve body (1); A non-return mechanism, the non-return mechanism comprising a connecting strip (6) fixedly connected between the front and rear inner walls of the valve body (1), a fixing plate (7) fixedly connected to the left side of the connecting strip (6), a piston cylinder (9) fixedly connected to the left side of the fixing plate (7), a piston plate (10) slidable left and right is arranged in the piston cylinder (9), a spring (11) fixedly connected to the left side of the piston plate (10), the left side of the spring (11) passes through the piston cylinder (9) and is fixedly connected to a sealing plate (5), and a contact ring (4) is fixedly connected to the inner wall of the left part of the valve body (1); An elastic adjustment mechanism, wherein the elastic adjustment is used to change the opening pressure of the sealing plate (5).

2. The high performance zero leakage axial flow check valve according to claim 1, characterized in that: The sealing plate (5) is a truncated cone structure and cooperates with the contact ring (4).

3. The high performance zero leakage axial flow check valve according to claim 1, characterized in that: A plurality of first guide rods (8) are fixedly connected to the right side of the sealing plate (5), and the plurality of first guide rods (8) all penetrate the fixed plate (7) and are slidably connected to the fixed plate (7).

4. The high performance zero leakage axial flow check valve according to claim 1, characterized in that: The outer sides of the left and right sides of the valve body (1) are fixedly connected with mounting rings (3), and each mounting ring (3) is mounted with a sealing ring (16).

5. The high performance zero leakage axial flow check valve according to claim 1, characterized in that: The elastic adjustment mechanism comprises a rectangular strip (2) fixedly connected to the upper end of the valve body (1), a columnar cavity is arranged in the rectangular strip (2), a columnar piston block (13) which can slide up and down is arranged in the columnar cavity, a screw rod (14) is arranged through the inner top of the columnar cavity, the screw rod (14) is rotatably connected to the inner top of the columnar cavity, a thread groove is vertically arranged through the columnar piston block (13), the lower end of the screw rod (14) extends into the thread groove and is threadedly connected to the inner wall of the thread groove, the bottom space of the columnar cavity, the right side space of the piston cylinder (9) and the connecting pipe (12) are filled with hydraulic oil, and the upper end of the screw rod (14) is fixedly connected to a torsion plate.

6. The high performance zero leakage axial flow check valve according to claim 5, characterized in that: The upper end of the columnar piston block (13) is symmetrically fixedly connected to two second guide rods (15), and the upper ends of the two second guide rods (15) both penetrate the inner top of the columnar cavity.

Images