One-way grease injection valve

Abstract

The utility model discloses a one-way grease injection valve which comprises a valve body, a step cavity is formed in the valve body and composed of an upper cavity, a middle cavity and a lower cavity, the upper cavity is communicated with the upper end face of the valve body, the lower cavity is communicated with the lower end face of the valve body, a valve element is in threaded connection with the interior of the lower cavity, and a through hole penetrating through the upper end face of the valve element is formed in the valve element. A plug and a spring are arranged in the middle cavity, the spring is connected between the valve element and the plug, and the plug can seal a connecting opening between the upper cavity and the middle cavity under the driving of the spring without the action of external force; a valve bonnet is further arranged on the valve body, and a communication opening between the upper cavity and the upper end face of the valve body can be sealed through the valve bonnet. According to the utility model, the grease supply pressure is maintained in a stable range; the problem that the connection part of the valve element and the valve body is broken due to too large grease injection pressure is solved, and the leakage problem is avoided.

Description

Technical Field

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

[0002] The grease injection valve is a device for filling lubricating grease into large machinery, petrochemical equipment, ball valves, flat gate valves, wellhead devices and other equipment. It is used to add sealing grease or lubricating grease to key parts of the equipment, such as seals and bearings, so that the equipment can maintain a good operating state and extend the service life of the equipment.

[0003] Users have higher and higher requirements for the use of grease injection valves. In addition to being non-leaky, they also require grease injection valves to have stable grease supply pressure. At present, a set of grease injection valves with non-leaky and stable grease supply pressure can be easily found on the market, but the applicants found that the cheap ones often have unstable performance, while the ones with stable performance are relatively complex, resulting in high costs. How to meet user needs with the most streamlined structure has high practical value. Utility Model Content

[0004] In order to solve the problems existing in the prior art, the utility model aims to provide a one-way grease injection valve, which is not prone to leakage and has a stable grease supply pressure, while having a simple structure, being easy to manufacture and reducing costs.

[0005] In order to achieve the above technical objectives and effects, the utility model is implemented through the following technical solutions:

[0006] A one-way grease injection valve comprises a valve body, wherein a stepped chamber is provided in the valve body, the stepped chamber is composed of an upper, middle and lower chamber, the upper chamber is communicated with the upper end surface of the valve body, the lower chamber is communicated with the lower end surface of the valve body, and a valve core is threadedly connected in the lower chamber, and a through hole penetrating through the upper end surface of the valve core is provided in the valve core; a plug and a spring are provided in the middle chamber, the spring is connected between the valve core and the plug, and in the absence of external force, the plug can seal the connecting port between the upper chamber and the middle chamber under the drive of the spring; a valve cap is also provided on the valve body, and the connecting port between the upper chamber and the upper end surface of the valve body can be sealed by the valve cap.

[0007] Furthermore, the valve body is integrally formed.

[0008] Furthermore, a hexagonal pair of opposite sides is provided in the middle of the outer surface of the valve body.

[0009] Furthermore, the aperture of the upper chamber is smaller than the aperture of the middle chamber; and the aperture of the middle chamber is smaller than the aperture of the lower chamber.

[0010] Furthermore, the plug is a sphere.

[0011] Furthermore, the outer surface of the valve core is stepped, including an upper step section penetrating the middle chamber and a lower step section threadedly connected to the lower chamber.

[0012] Furthermore, the through hole is a stepped hole, which includes upper, middle and lower stepped holes.

[0013] Furthermore, the lower step is a hexagonal opposite side hole.

[0014] Furthermore, the diameter of the upper stepped hole is larger than the outer diameter of the spring.

[0015] Furthermore, the valve cap and the valve body are threadedly matched, and a sealing platform and a vent hole are provided on the valve cap.

[0016] The beneficial effects of the utility model are as follows: the utility model ensures the constant installation position of the valve core in the valve body by limiting the valve core, thereby ensuring that the spring connected between the valve core and the plug is compressed to the same distance, thereby achieving that the fat supply pressure is maintained within a stable range; secondly, the application effectively avoids the problem of collapse of the connection between the valve core and the valve body caused by excessive fat injection pressure, thereby avoiding leakage problems.

[0017] 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

[0018] 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:

[0019] Figure 1 This is a cross-sectional view of the grease injection valve of the utility model;

[0020] Figure 2 This is a cross-sectional view of the valve body of the utility model;

[0021] Figure 3 This is a cross-sectional view of the valve core of the utility model.

[0022] Explanation of the numbers in the figure: 1. Valve body; 2. Valve core; 3. Plug; 4. Spring; 5. Valve bonnet; 11. Step chamber; 12. Hexagonal opposite sides; 21. Through hole; 22. Upper step section; 23. Lower step section; 51. Sealing platform; 52. Vent; 101. Bevel; 111. Upper chamber; 112. Middle chamber; 113. Lower chamber; 211. Upper step hole; 212. Middle step hole; 213. Lower step hole. DETAILED DESCRIPTION

[0023] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0024] 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.

[0025] See also Figure 1-3 As shown, a one-way grease injection valve comprises a valve body 1, the valve body 1 is integrally formed, and a hexagonal opposite side 12 is arranged in the middle of the outer surface of the valve body 1; a stepped chamber 11 is provided in the valve body 1, and the stepped chamber 11 is composed of upper, middle and lower chambers 111, 112 and 113, the upper chamber 111 is communicated with the upper end surface of the valve body 1, the lower chamber 113 is communicated with the lower end surface of the valve body 1, and a valve core 2 is threadedly connected in the lower chamber 113, and a valve core 2 is provided in the valve core 2, and a valve core 2 is provided with a valve core 2 penetrating its upper end surface. The middle chamber 112 can be connected with the outside through the through hole 21; the middle chamber 112 is provided with a plug 3 and a spring 4, and the spring 4 is connected between the valve core 2 and the plug 3. In the absence of external force, the plug 3 can seal the connection between the upper chamber 111 and the middle chamber 112 under the drive of the spring 4; a valve cap 5 is also provided on the valve body 1, and the connection between the upper chamber 111 and the upper end surface of the valve body 1 can be sealed by the valve cap 5.

[0026] The "connection" of the spring 4 between the valve core 2 and the plug 3 can be a fixed connection or an offset connection. In this embodiment, one end of the spring 4 is connected to the valve core 2 in an offset manner, and in other embodiments, one end of the spring 4 is connected to the valve core 2 in a fixed manner. At the same time, in this embodiment, the other end of the spring 4 is connected to the plug 3 in an offset manner, and in other embodiments, the other end of the spring 4 is connected to the plug 3 in a fixed manner.

[0027] For further information, see Figure 2 As shown, in this embodiment, the apertures of the upper, middle and lower chambers 111, 112 and 113 in the stepped chamber 11 increase successively, that is, the aperture of the upper chamber 111 is smaller than that of the middle chamber 112, and the aperture of the middle chamber 112 is smaller than that of the lower chamber 113.

[0028] For further information, see Figure 1 As shown, in this embodiment, the plug 3 is a sphere.

[0029] For further information, see Figure 3 As shown, in this embodiment, the outer surface of the valve core 2 is stepped, including an upper step section 22 and a lower step section 23; when the valve core 2 is connected to the valve body 1, see Figure 1 As shown, at this time, the upper step section 22 is inserted into the upper step section 22, the lower step section 23 is threadedly connected to the lower chamber 113, and the upper end surface of the upper step section 22 is in conflict with the bottom surface of the hole of the lower chamber 11, so that the problem of the valve core 2 and the valve body 1 being broken due to excessive fat injection pressure can be effectively avoided, and leakage problems can be avoided. At the same time, through the upper end surface of the upper step section 22 and the bottom surface of the hole of the lower chamber 11 being in conflict with each other, the valve core 2 can be limited by the bottom surface of the hole of the lower chamber 11, ensuring that the installation position of the valve core 2 in the lower chamber 11 is constant each time, thereby ensuring that the spring 4 connected between the valve core 2 and the plug 3 is compressed by the same distance, thereby maintaining the fat supply pressure within a stable range.

[0030] For further information, see Figure 3 As shown, in this embodiment, the through hole 21 is a stepped hole, which includes upper, middle and lower stepped holes 211, 212 and 213; wherein the aperture of the middle stepped hole 212 is smaller than the aperture of the lower stepped hole 213, and the aperture of the lower stepped hole 213 is smaller than the aperture of the upper stepped hole 211; and the aperture of the upper stepped hole 211 is larger than the outer diameter of the spring 4. When installing, refer to Figure 1As shown, the lower end of the spring 4 is arranged in the upper stepped hole 211, and the spring 4 is butted against the bottom of the upper stepped hole 211; the lower stepped hole 213 is a hexagonal opposite-side hole.

[0031] For further information, see Figure 1 As shown, in the present embodiment, the valve bonnet 5 and the valve body 1 are threadedly matched to facilitate the disassembly of the valve bonnet 5; a sealing platform 51 and a vent hole 52 are provided on the valve bonnet 5. When the valve bonnet 5 is connected to the valve body 1, the sealing platform 51 is partially inserted into the communication port between the upper chamber 111 and the upper end surface of the valve body 1, thereby sealing the communication port; wherein, in the present embodiment, the communication port between the upper chamber 111 and the upper end surface of the valve body 1 is guided with an angle 101, the sealing platform 51 is configured to be a cone adapted to the angle 101, and the vent holes 52 are configured in two groups, symmetrically distributed on both sides of the sealing platform 51. Of course, the number of groups of the vent holes 52 is only one implementation method, and is not intended to limit the scope of the present application. In actual settings, at least one group is provided as long as the requirements can be met.

[0032] The working principle of the utility model is as follows:

[0033] When in use, the grease injection valve is installed in the equipment or pipeline; when grease injection is needed, the valve cap 5 is first removed from the valve body 1; then grease is injected into the valve body 1 through the upper chamber 111. When the pressure of the injected grease is greater than the force of the spring 4 on the plug 3, the plug 3 is compressed and the spring 4 is compressed to contract. At this time, the plug 3 releases the blockage of the connection between the upper chamber 111 and the middle chamber 112, so that the grease enters the middle chamber 112, the upper step hole 211, the middle step hole 212 and the lower step hole 213 in turn and is then injected into the equipment or pipeline. When the grease injection pressure into the valve body 1 is less than the force exerted by the spring 4 on the plug 3, the plug 3 is displaced toward the connecting port between the upper chamber 111 and the middle chamber 112 under the action of the spring 4 until it returns to the initial position and stops. At this time, the plug 3 seals the connecting port between the upper chamber 111 and the middle chamber 112 again to achieve a primary seal; then the valve cap 5 is put back on the valve body 1. At this time, the sealing platform 5 is partially inserted into the connecting port between the upper chamber 111 and the upper end face of the valve body 1 to achieve a secondary seal.

[0034] 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 one-way grease injection valve, characterized in that: The invention comprises a valve body (1), wherein a stepped chamber (11) is provided in the valve body (1), and the stepped chamber (11) is composed of upper, middle and lower chambers (111, 112 and 113), wherein the upper chamber (111) is connected to the upper end surface of the valve body (1), and the lower chamber (113) is connected to the lower end surface of the valve body (1), and a valve core (2) is threadedly connected in the lower chamber (113), and a through hole (21) penetrating the upper end surface of the valve core (2) is provided in the valve core (2); the middle chamber (111) is connected to the lower end surface of the valve body (1), and the valve core (2) is connected to the lower end surface of the valve body (1). A plug (3) and a spring (4) are arranged in the valve body (112), and the spring (4) is connected between the valve core (2) and the plug (3). In the absence of external force, the plug (3) can seal the connection between the upper chamber (111) and the middle chamber (112) under the drive of the spring (4); a valve cap (5) is also arranged on the valve body (1), and the communication port between the upper chamber (111) and the upper end surface of the valve body (1) can be sealed by the valve cap (5).

2. The one-way grease injection valve according to claim 1, characterized in that: The valve body (1) is integrally formed.

3. The one-way grease injection valve according to claim 2, characterized in that: A hexagonal opposite side (12) is provided in the middle of the outer surface of the valve body (1).

4. The one-way grease injection valve according to claim 1, characterized in that: The aperture of the upper chamber (111) is smaller than the aperture of the middle chamber (112); and the aperture of the middle chamber (112) is smaller than the aperture of the lower chamber (113).

5. The one-way grease injection valve according to claim 1, characterized in that: The plug (3) is a sphere.

6. The one-way grease injection valve according to claim 1, characterized in that: The outer surface of the valve core (2) is stepped, comprising an upper step section (22) penetrating the middle chamber (112) and a lower step section (23) threadedly connected to the lower chamber (113).

7. The one-way grease injection valve according to claim 1, characterized in that: The through hole (21) is a stepped hole, comprising upper, middle and lower stepped holes (211, 212, 213).

8. The one-way grease injection valve according to claim 7, characterized in that: The lower step (213) is a hexagonal opposite side hole.

9. The one-way grease injection valve according to claim 7, characterized in that: The diameter of the upper stepped hole (211) is larger than the outer diameter of the spring (4).

10. The one-way grease injection valve according to claim 1, characterized in that: The valve cap (5) and the valve body (1) are threadedly matched, and a sealing platform (51) and a vent hole (52) are provided on the valve cap (5).

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