Grease injection check valve

Abstract

The utility model discloses a grease injection check valve which comprises a valve body, a grease inlet hole is formed in the upper end face of the valve body, and a cavity communicated with the grease inlet hole is formed in the lower end face of the valve body. A locking jackscrew, a valve seat, a spring and a ball are arranged in the cavity, the locking jackscrew is in threaded connection with the cavity, an opening of the cavity is sealed through the locking jackscrew, and a through hole penetrating through the upper end face and the lower end face of the locking jackscrew is formed in the locking jackscrew. The valve seat is arranged on the connecting face of the grease inlet hole and the cavity, a via hole communicated with the grease inlet hole is formed in the valve seat, one end of the spring is connected with the locking jackscrew, the other end of the spring is connected with the ball body, and the via hole is sealed under the driving of the spring without the action of external force. According to the grease injection device, one-way conveying in the grease injection process is achieved, backflow is effectively avoided, and the grease injection accuracy is guaranteed; and secondly, the locking jackscrew and the valve body are connected in a threaded mode, and the problem that the valve breaks open in the high-pressure grease infusion process can be effectively solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of check valves, and in particular relates to a grease injection check valve. Background Art

[0002] A check valve is a valve whose opening and closing parts are circular discs and which rely on their own weight and medium pressure to produce movement to block the backflow of the medium. It belongs to the category of automatic valves, also known as non-return valves, one-way valves, return valves or isolation valves. The disc movement modes are divided into lifting type and swing type. The lifting check valve is similar to the stop valve in structure, only lacking the valve stem that drives the disc. The medium flows in from the inlet end (lower side) and flows out from the outlet end (upper side). When the inlet pressure is greater than the sum of the weight of the disc and its flow resistance, the valve is opened. On the contrary, the valve is closed when the medium flows back. The existing lifting check valves often use riveting to seal, and there is a risk of the riveting part collapsing when high-pressure oil is injected; therefore, it is necessary to design a grease injection check valve to effectively solve the above technical problems. Utility Model Content

[0003] In order to solve the risks existing in the prior art, the utility model aims to provide a grease injection check valve to achieve one-way delivery, avoid backflow, and overcome the risk of collapse, thereby improving its safety and service life.

[0004] In order to achieve the above technical objectives and effects, the utility model is implemented through the following technical solutions:

[0005] A grease injection check valve comprises a valve body, wherein the upper end surface of the valve body is provided with a grease inlet hole and the lower end surface is provided with a chamber connected with the grease inlet hole; a locking top screw, a valve seat, a spring and a ball are provided in the chamber, the locking top screw is threadedly connected with the chamber, and the opening of the chamber is sealed by the locking top screw, and a through hole penetrating the upper and lower end surfaces thereof is provided in the locking top screw; the valve seat is provided at the connecting surface of the grease inlet hole and the chamber, and a through hole connected with the grease inlet hole is provided on the valve seat, one end of the spring is connected with the locking top screw, and the other end of the spring is connected with the ball, and in the absence of external force, the ball is driven by the spring to seal the through hole.

[0006] Furthermore, the locking top screw is a stepped shaft, which includes a top screw section one and a top screw section two, and an external thread is provided on the outer surface of the top screw section one.

[0007] Furthermore, the through hole is a stepped hole, which includes a first through hole section, a second through hole section, and a third through hole section connecting the first through hole section and the second through hole section.

[0008] Furthermore, the spring is placed in the first section of the through hole, and one end of the spring is in contact with the first section of the through hole and the third section of the through hole.

[0009] Furthermore, the second section of the through hole is a hexagonal inner corner.

[0010] Furthermore, the fat inlet hole is a stepped hole, which includes a first fat inlet section connected to the outside, a second fat inlet section connected to the via hole, and a third fat inlet section connecting the first fat inlet section and the second fat inlet section.

[0011] Furthermore, the grease is injected into a section of the opposite sides of the hexagonal socket.

[0012] Furthermore, the via hole is shaped as a spherical hole.

[0013] Furthermore, the valve body is a stepped shaft, and the stepped shaft includes valve body section one and valve body section two.

[0014] The beneficial effects of the utility model are as follows: the utility model realizes one-way transportation during the grease injection process, effectively avoids backflow, and ensures the accuracy of grease injection; secondly, the threaded connection between the locking top screw and the valve body of the present application can effectively avoid the problem of valve collapse during high-pressure grease infusion.

[0015] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiment of the utility model with the accompanying drawings. The specific implementation method of the utility model is given in detail by the following embodiments and their drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0017] Figure 1 This is a cross-sectional view of the overall structure of the check valve of the utility model;

[0018] Figure 2 This is a schematic diagram of the locking top screw structure of the utility model;

[0019] Figure 3 It is a schematic diagram of the valve seat and valve seat connection of the utility model.

[0020] Explanation of the numbers in the figure: 1. Valve body; 2. Locking screw; 3. Valve seat; 4. Spring; 5. Ball; 11. Grease inlet hole; 12. Chamber; 13. Valve body section 1; 14. Valve body section 2; 21. Through hole; 22. Screw section 1; 23. Screw section 2; 31. Through hole; 111. Grease inlet section 1; 112. Grease inlet section 2; 113. Grease inlet section 3; 211. Through hole section 1; 212. Through hole section 2; 213. Through hole section 3; DETAILED DESCRIPTION

[0021] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0022] It should be noted that the orientation or position relationship indicated by the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like in the embodiments of the utility model is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the patent of the present invention and simplifying the description, rather than indicating or implying 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 patent of the present invention; in addition, unless otherwise clearly specified and limited, the terms "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 an indirect connection through an intermediate medium, or it can be the internal connection of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the patent of the present invention can be understood according to specific circumstances.

[0023] See also Figure 1-3 As shown, a grease injection check valve comprises a valve body 1, wherein the upper end surface of the valve body 1 is provided with a grease inlet hole 11 and the lower end surface is provided with a chamber 12 connected with the grease inlet hole 11; a locking top screw 2, a valve seat 3, a spring 4 and a ball 5 are provided in the chamber 12, the locking top screw 2 is threadedly connected with the chamber 12, and the opening of the chamber 12 is sealed by the locking top screw 2, and a through hole 21 penetrating the upper and lower end surfaces thereof is provided in the locking top screw 2; the valve seat 3 is arranged at the connecting surface of the grease inlet hole 11 and the chamber 12, and a through hole 31 connected with the grease inlet hole 11 is provided on the valve seat 3, one end of the spring 4 is connected with the locking top screw 2, and the other end of the spring 4 is connected with the ball 5, and in the absence of external force, the ball 5 is driven by the spring 4 to seal the through hole 31.

[0024] Further, in this embodiment, see Figure 2 As shown, the locking screw 2 is a stepped shaft, which includes a screw section 22 and a screw section 23. The outer surface of the screw section 22 is provided with an external thread. Figure 1 As shown, the first section of the top screw 22 is threadedly connected to the chamber 12 through its external thread. At this time, the second section of the top screw 23 is completely accommodated in the chamber 12, and the upper end surface of the second section of the top screw 23 is against the end surface of the valve seat 3 to form a closed connection. At this time, the through hole 31 is connected to the through hole 21.

[0025] Further, in this embodiment, see Figure 2 As shown, the through hole 21 is a stepped hole, which includes a first through hole section 211, a second through hole section 212, and a third through hole section 213 connecting the first through hole section 211 and the second through hole section 212. The aperture of the third through hole section 213 is smaller than the aperture of the second through hole section 212, and the aperture of the second through hole section 212 is smaller than the aperture of the first through hole section 211. After the installation is completed, see Figure 1 As shown, the first through hole section 211 is connected to the via hole 31, and the second through hole section 212 is connected to the outside; the spring 4 is placed in the first through hole section 211, and one end of the spring 4 is in contact with the connecting surface between the first through hole section 211 and the third through hole section 213; in addition, the second through hole section 212 is a hexagonal opposite side.

[0026] Further, in this embodiment, see Figure 3 As shown, the fat inlet hole 11 is a stepped hole, which includes a fat inlet section 111 connected to the outside, a fat inlet section 112 connected to the via hole 31, and a fat inlet section 113 connecting the fat inlet section 111 and the fat inlet section 112. The aperture of the fat inlet section 111 is larger than the aperture of the fat inlet section 113, and the aperture of the fat inlet section 113 is larger than the aperture of the fat inlet section 112; wherein, the fat inlet section 111 has hexagonal opposite sides.

[0027] Further, in this embodiment, see Figure 3 As shown, the through hole 31 is shaped as a spherical hole, and its size is exactly matched with the sphere 5; after the installation is completed, see Figure 1 As shown, in the absence of external force, the sphere 5 is partially accommodated in the through hole 31 under the action of the spring 4, and the through hole 31 is sealed by cooperating with the through hole 31 to prevent grease from entering.

[0028] Further, in this embodiment, see Figure 3 As shown, the valve body 1 is a stepped shaft, which includes a valve body section 13 and a valve body section 2 14 . The outer diameter of the valve body section 13 is greater than the outer diameter of the valve body section 2 14 , and the two are connected by an oblique angle.

[0029] The working principle of the utility model is as follows:

[0030] When in use, the check valve is installed in the equipment or pipeline; when grease injection is required, the grease is transported through the grease inlet hole 11 and the hole 31 toward the chamber 12, wherein, when the pressure on the transported grease is greater than the force of the spring 4 on the ball 5, the ball 5 is compressed and the spring 4 is compressed to contract, at which time the ball 5 moves away from the through hole 31, thereby releasing the seal on the through hole 31, and then the grease enters the first through hole 211 through the through hole 31, and is transported to the equipment and pipeline after passing through the third through hole 213 and the first through hole 211 in turn; and when the pressure on the transported grease is less than the force of the spring 4 on the ball 5, the spring 5 drives the ball 5 to move toward the hole 31 until the ball 5 returns to its initial position and stops; at this time, the through hole 31 is sealed, and the grease delivery is stopped while the backflow of the grease is avoided.

[0031] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A grease injection check valve, characterized in that: The valve body (1) comprises a valve body, wherein the upper end surface of the valve body (1) is provided with a grease inlet hole (11), and the lower end surface is provided with a chamber (12) connected with the grease inlet hole (11); the chamber (12) is provided with a locking top screw (2), a valve seat (3), a spring (4) and a ball (5); the locking top screw (2) is threadedly connected to the chamber (12); the opening of the chamber (12) is sealed by the locking top screw (2); a valve seat (3) is provided in the locking top screw (2) and a valve seat (4) is provided in the locking top screw (2) and a valve seat (5) is provided in the locking top screw (2) and ...4) is provided in the locking top screw (2) and a valve seat (4) is provided in the locking top screw (2) and a valve The valve seat (3) is arranged at the connection surface between the fat inlet hole (11) and the chamber (12), and the valve seat (3) is provided with a through hole (31) connected with the fat inlet hole (11). One end of the spring (4) is connected with the locking screw (2), and the other end of the spring (4) is connected with the ball (5). In the absence of external force, the ball (5) is driven by the spring (4) to seal the through hole (31).

2. The grease injection check valve according to claim 1, characterized in that: The locking top screw (2) is a stepped shaft, which comprises a top screw section (22) and a top screw section (23). An external thread is provided on the outer surface of the top screw section (22).

3. The grease injection check valve according to claim 1, characterized in that: The through hole (21) is a stepped hole, comprising a first through hole section (211), a second through hole section (212), and a third through hole section (213) connecting the first through hole section (211) and the second through hole section (212).

4. The grease injection check valve according to claim 3, characterized in that: The spring (4) is placed in the first through hole section (211), and one end of the spring (4) is in contact with the leveling surface of the first through hole section (211) and the third through hole section (213).

5. The grease injection check valve according to claim 3, characterized in that: The second section (212) of the through hole is a hexagonal inner corner.

6. The grease injection check valve according to claim 1, characterized in that: The fat inlet hole (11) is a stepped hole, comprising a first fat inlet section (111) connected to the outside, a second fat inlet section (112) connected to the via hole (31), and a third fat inlet section (113) connecting the first fat inlet section (111) and the second fat inlet section (112).

7. The grease injection check valve according to claim 6, characterized in that: The grease inlet section (111) has an inner hexagonal opposite side.

8. The grease injection check valve according to claim 1, characterized in that: The through hole (31) is shaped as a spherical hole.

9. The grease injection check valve according to claim 1, characterized in that: The valve body (1) is a stepped shaft, which comprises a valve body section (13) and a valve body section (14).

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