Check valve of oil injector

Abstract

The check valve of the oil injector comprises a valve body, an oil outlet is formed in the center of the top of the valve body, a first through cavity is formed in the bottom of the oil outlet, an oil inlet is formed in the center of the bottom of the valve body, a second through cavity is formed in the bottom of the oil inlet, the oil outlet is connected with a second fixing block in a clamped mode, and a second spring is arranged in the first through cavity. A sealing block is arranged at the bottom of the first through cavity, one end of a second spring is connected with a second fixing block, the other end of the second spring is connected with the sealing block, a first fixing block is arranged on the back face of the sealing block and located at the second through cavity, a first spring is arranged in the second through cavity, and a piston is arranged at the other end of the first spring. According to the check valve, the second fixing block and the piston can be taken down, and then the influence on the check valve can be reduced by replacing the first spring, the second spring and the sealing block.

Description

Technical Field

[0001] The utility model relates to the technical field of check valves, in particular to a check valve for an oil injector. Background Art

[0002] Reciprocating power machinery, such as large reciprocating compressors, internal combustion engines, etc., suffers from wear of moving parts due to high-speed and high-frequency operation, which leads to a sharp decline in equipment performance and life. Therefore, in order to improve the friction and wear of moving parts, it is usually necessary to design an independent oil injection lubrication system to inject oil and force lubricate the friction surface of the moving parts; the check valve on the oiler in the prior art is mainly composed of a valve housing, a steel ball and a spring. The steel ball forms a linear contact with the contact part of the valve seat to seal the oil filling port. A compression spring is connected to its upper part, and the other end of the compression spring is connected to the top of the oiler. When oil is supplied to the oil filling port, the steel ball reciprocates in the oiler under the impact of the lubricating oil.

[0003] However, the compression spring of the prior art oiler check valve will be continuously compressed during use. After long-term use, the compression spring may suffer from elastic fatigue, which may affect the work of the compression spring itself and further affect the use of the check valve. Utility Model Content

[0004] The utility model aims to provide a check valve for an oil injector to solve the problems raised in the above-mentioned background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] An oil injector check valve comprises a valve body, wherein the valve body is in the shape of two cylinders of different diameters, the small cylinder is located above the large cylinder, an oil outlet is provided at the center of the top of the small cylinder of the valve body, a first through cavity is provided at the bottom of the oil outlet, an oil inlet is provided at the center of the bottom of the large cylinder of the valve body, a second through cavity is provided at the bottom of the oil inlet, and the oil inlet, the first through cavity, the second through cavity and the oil outlet are connected;

[0007] The oil outlet is snap-fittedly connected with a second fixed block, a second spring is arranged inside the first through cavity, a sealing block is arranged at the bottom of the first through cavity, one end of the second spring is connected to the second fixed block, the other end of the second spring is connected to the sealing block, a first fixed block is arranged on the back of the sealing block, the first fixed block is located at the second through cavity, a first spring is arranged inside the second through cavity, a piston is arranged at the other end of the first spring, the bottom surface of the piston is located at the second through cavity, and the top surface of the piston is located at the oil inlet.

[0008] Preferably, the second fixing block is in the shape of a circular ring.

[0009] Preferably, the first fixing block is in the shape of a circular ring, the outer diameter of the first fixing block matches the diameter of the second through cavity, and the inner diameter of the first fixing block matches the diameter of the first through cavity.

[0010] Preferably, a plurality of oil pipe passages are opened at the bottom of the oil inlet, and the other end of the oil pipe passage is located at the second through cavity.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] The utility model provides an oil injector check valve, the second fixing block can be removed from the oil outlet, so that the second spring and the sealing block can be removed together, and the influence on the check valve can be reduced by replacing the new second spring and the sealing block.

[0013] The utility model discloses an oil injector check valve. When in use, the piston is inserted between the second through cavity and the oil inlet. When the first spring has a problem, the piston can be removed, and the influence on the check valve can be reduced by replacing a new first spring. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a cross-sectional structural schematic diagram of the utility model.

[0015] In the figure: 1, valve body; 2, first through cavity; 3, second through cavity; 4, oil inlet; 5, oil pipe passage; 6, piston; 7, first spring; 8, first fixed block; 9, sealing block; 10, second spring; 11, oil outlet; 12, second fixed block. DETAILED DESCRIPTION

[0016] 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.

[0017] In the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0018] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0019] See also Figure 1 , the utility model provides a technical solution:

[0020] A lubricator check valve comprises a valve body 1, the valve body 1 is in the shape of two cylinders of different diameters, the small cylinder is located above the large cylinder, an oil outlet 11 is provided at the center of the top of the small cylinder of the valve body 1, a first through cavity 2 is provided at the bottom of the oil outlet 11, an oil inlet 4 is provided at the center of the bottom of the large cylinder of the valve body 1, a second through cavity 3 is provided at the bottom of the oil inlet 4, and the oil inlet 4, the first through cavity 2, the second through cavity 3, and the oil outlet 11 are connected;

[0021] The oil outlet 11 is snap-fittedly connected to the second fixed block 12, a second spring 10 is arranged inside the first through cavity 2, a sealing block 9 is arranged at the bottom of the first through cavity 2, one end of the second spring 10 is connected to the second fixed block 12, the other end of the second spring 10 is connected to the sealing block 9, a first fixed block 8 is arranged on the back of the sealing block 9, the first fixed block 8 is located at the second through cavity 3, a first spring 7 is arranged inside the second through cavity 3, a piston 6 is arranged at the other end of the first spring 7, the bottom surface of the piston 6 is located at the second through cavity 3, and the top surface of the piston 6 is located at the oil inlet 4.

[0022] Furthermore, the second fixing block 12 is in the shape of a circular ring.

[0023] Furthermore, the first fixing block 8 is in the shape of a circular ring, the outer diameter of the first fixing block 8 matches the diameter of the second through cavity 3 , and the inner diameter of the first fixing block 8 matches the diameter of the first through cavity 2 .

[0024] Furthermore, a plurality of oil pipe passages 5 are opened at the bottom of the oil inlet 4 , and the other end of the oil pipe passage 5 is located at the second through cavity 3 .

[0025] Working principle: When the utility model is in use, the oil will move from the oil inlet 4 to the oil outlet 11. During the movement, a part of the oil will act on the piston 6, causing the piston 6 to move toward the other end of the second through cavity 2, and the other part of the oil will enter the back of the piston 6 from the oil pipe passage 5. Here the oil will pass through the first fixed block 8 and act on the sealing block 9. The sealing block 9 will move to the other end of the first through cavity 2 under pressure, and part of the oil will be discharged from the oil outlet 11 at this time.

[0026] It should be noted that when the oil supply is stopped, the piston 6 will return to the initial position due to the action of the first spring 7, wherein a sealing ring is provided on the surface of the piston 6 to prevent the oil from flowing back.

[0027] In addition, during use, the first spring 7 and the second spring 10 will be compressed due to pressure. After long-term use, the first spring 7 and the second spring 10 will show a certain elastic fatigue, so the first spring 7 and the second spring 10 need to be replaced. The second fixing block 12 can be removed from the oil outlet 11, so that the second spring 10 and the sealing block 9 can be removed together, and the impact on the check valve can be reduced by replacing the new second spring 10 and the sealing block 9.

[0028] When in use, the piston 6 is inserted between the second through cavity 3 and the oil inlet 4. When the first spring 7 needs to be replaced, the piston 6 can be removed, and the influence on the check valve can be reduced by replacing the new first spring 7.

[0029] Although the 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 lubricator check valve, comprising a valve body (1), characterized in that: The valve body (1) is in the shape of two cylinders of different diameters, the small cylinder being located above the large cylinder, an oil outlet (11) being provided at the center of the top of the small cylinder of the valve body (1), a first through cavity (2) being provided at the bottom of the oil outlet (11), an oil inlet (4) being provided at the center of the bottom of the large cylinder of the valve body (1), a second through cavity (3) being provided at the bottom of the oil inlet (4), the oil inlet (4), the first through cavity (2), the second through cavity (3) and the oil outlet (11) being connected; The oil outlet (11) is snap-fittedly connected to a second fixed block (12); a second spring (10) is arranged inside the first through cavity (2); a sealing block (9) is arranged at the bottom of the first through cavity (2); one end of the second spring (10) is connected to the second fixed block (12); the other end of the second spring (10) is connected to the sealing block (9); a first fixed block (8) is arranged on the back of the sealing block (9); the first fixed block (8) is located at the second through cavity (3); a first spring (7) is arranged inside the second through cavity (3); a piston (6) is arranged at the other end of the first spring (7); the bottom of the surface of the piston (6) is located at the second through cavity (3); and the top of the surface of the piston (6) is located at the oil inlet (4).

2. The lubricator check valve according to claim 1, characterized in that: The second fixing block (12) is in the shape of a circular ring.

3. The lubricator check valve according to claim 1, characterized in that: The first fixing block (8) is in the shape of a circular ring, the outer diameter of the first fixing block (8) matches the diameter of the second through cavity (3), and the inner diameter of the first fixing block (8) matches the diameter of the first through cavity (2).

4. The oiler check valve according to claim 1, characterized in that: A plurality of oil pipe passages (5) are provided at the bottom of the oil inlet (4), and the other end of the oil pipe passages (5) is located at the second through cavity (3).

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