Limiting grease injection valve

Abstract

The grease injection valve with the limiting function comprises a valve body, a channel which penetrates through the upper end face and the lower end face of the valve body and is used for grease to pass through is formed in the valve body, a ball body capable of controlling on-off of the channel is arranged in the channel, a ball support is arranged at the lower end of the ball body, and a limiting groove matched with the ball body is formed in the upper end face of the ball support. A spring is arranged at the lower end of the ball support, a valve element is arranged in a channel located at the lower end of the spring, the spring is limited in the channel through the valve element, and the spring drives the ball body to disconnect the channel through the ball support without external force. The valve element is in threaded connection with the channel, a through hole penetrating through the upper end face and the lower end face of the valve element is formed in the valve element, and the channel can communicate with the outside through the through hole. One-way grease injection is achieved, the use requirement is met, meanwhile, the structure is simple, production and manufacturing are easy, and cost is reduced; secondly, the service life of the valve is effectively prolonged; in addition, the valve can be maintained at a stable grease supply pressure.

Description

Technical Field

[0001] The utility model belongs to the technical field of valves, and in particular relates to a grease injection valve with a limit function. 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] The users have higher and higher requirements for use. In addition to stable fat supply, they also need a long service life. However, the applicant found that currently, a set of devices with stable fat supply and long service life is often complex in structure and expensive in cost. How to meet the needs of users 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 grease injection valve with a limit function, so as to meet the use requirements 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 grease injection valve with a limit function comprises a valve body, wherein the valve body is provided with a channel penetrating the upper and lower end surfaces thereof for allowing grease to pass through, a ball which can control the on and off of the channel is arranged in the channel, a ball holder is arranged at the lower end of the ball body, a limit groove which matches the ball body is arranged on the upper end surface of the ball holder, a spring is arranged at the lower end of the ball holder, a valve core is arranged in the channel located at the lower end of the spring, the spring is limited in the channel by the valve core, and in the absence of external force, the spring drives the ball through the ball holder to disconnect the channel; the valve core is threadedly connected to the channel, and a through hole penetrating the upper and lower end surfaces of the valve core is arranged in the valve core, and the channel can be connected to the outside world through the through hole.

[0007] Furthermore, the channel is a stepped hole, which includes a first step portion, a second step portion, a third step portion and a fourth step portion from top to bottom; wherein the ball, the ball holder and the spring are all located in the third step portion, and the valve core is threadedly connected to the fourth step portion.

[0008] Furthermore, the upper end of the spring and the ball holder are in abutting connection with each other, as well as the lower end of the spring and the valve core.

[0009] Furthermore, the ball holder is T-shaped, and the outer diameter of its vertical connecting section is smaller than the inner hole diameter of the spring; while the outer diameter of the transverse connecting section is larger than the inner hole diameter of the spring, and the limiting groove is opened on the upper end surface of the transverse connecting section of the ball holder.

[0010] Furthermore, the valve core is a stepped shaft including an upper step section and a lower step section. After the valve core is threadedly connected to the fourth step section through the lower step section to which it belongs, the upper step section extends into the third step section.

[0011] Furthermore, the outer diameter of the upper step section is smaller than the inner hole diameter of the spring.

[0012] Furthermore, the middle portion of the outer surface of the valve body is arranged in a diagonal hexagonal shape; and the lower portion of the outer surface of the valve body is arranged with an external thread.

[0013] Furthermore, a valve cap is arranged on the upper part of the valve body, and a sealing platform and a vent hole are arranged on the valve cap.

[0014] Furthermore, the valve cap is threadedly connected to the valve body.

[0015] The beneficial effects of the utility model are as follows: the grease injection check valve of the utility model realizes one-way grease injection, which meets the use requirements while having a simple structure, easy to produce and manufacture, and reducing costs; secondly, by setting a ball holder, the ball is limited, which protects the ball, and the spring is set between the ball holder and the valve core, and the ball holder and the valve core are partially inserted into the inner hole of the spring, which effectively improves the practical life of the valve; in addition, the present application limits the valve core installation position, thereby ensuring that the spring compression distance is the same after each disassembly and maintenance, thereby ensuring that the grease supply pressure is maintained within a stable range.

[0016] 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

[0017] 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:

[0018] Figure 1 This is a schematic diagram of the overall structure of the valve of the utility model;

[0019] Figure 2This is a cross-sectional view of the valve of the utility model;

[0020] Figure 3 This is a cross-sectional view of the valve body of the utility model;

[0021] Figure 4 This is a cross-sectional view of the ball holder of the utility model;

[0022] Figure 5 This is a cross-sectional view of the valve core of the utility model;

[0023] Figure 6 This is a cross-sectional view of the valve cap of the utility model.

[0024] Explanation of the numbers in the figure: 1. valve body; 2. ball; 3. ball support; 4. spring; 5. valve core; 6. valve cap; 11. channel; 111. first step portion; 112. second step portion; 113. third step portion; 114. fourth step portion; 31. limit groove; 51. through hole; 52. upper step section; 53. lower step section; 61. sealing platform; 62. vent. DETAILED DESCRIPTION

[0025] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0026] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, upper end, lower end, top, bottom...) are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0027] See also Figure 1-5 As shown, a grease injection valve with a limit function comprises a valve body 1, wherein the valve body 1 is provided with a channel 11 penetrating the upper and lower end surfaces thereof for allowing grease to pass therethrough, wherein the channel 11 is provided with a ball 2 for controlling the on and off thereof, wherein the lower end of the ball 2 is provided with a ball holder 3, wherein the upper end surface of the ball holder 3 is provided with a limit groove 31 adapted to the ball 2, wherein the lower end of the ball holder 3 is provided with a spring 4, wherein the channel 11 located at the lower end of the spring 4 is provided with a valve core 5, wherein the spring 4 is limited in the channel 11 by the valve core 5, and in the absence of external force, the spring 4 drives the ball 2 through the ball holder 3 to disconnect the channel 11; wherein the valve core 5 is threadedly connected to the channel 11, and wherein the valve core 5 is provided with a through hole 51 penetrating the upper and lower end surfaces thereof, wherein the channel 11 can be connected to the outside through the through hole 51.

[0028] For further details, see Figure 3As shown, the channel 11 is a stepped hole, which includes a first step portion 111, a second step portion 112, a third step portion 113 and a fourth step portion 114 with increasing apertures from top to bottom; wherein, after assembly, continue to refer to Figure 2 As shown, the ball 2, the ball holder 3 and the spring 4 are all located in the third step portion 113, and the valve core 5 is threadedly connected to the fourth step portion 114; at this time, the spring 4 is compressed between the ball holder 3 and the valve core 5, so that in the absence of external force, the spring 4 has a tendency to drive the ball 2 to move toward the second step portion 112 through the ball holder 3, and in this embodiment, the diameter of the ball 2 is larger than the aperture of the second step portion 112, so that the ball 2 is blocked and restricted at the connecting port between the second step portion 112 and the third step portion 113, thereby achieving the disconnection of the channel 11. Here, it should be noted that, in the present embodiment, the spring 4 is connected to the ball holder 3 and the valve core 5 by abutment, that is, the upper end of the spring 4 and the ball holder 3, as well as the lower end of the spring 4 and the valve core 5, are connected by abutment. Of course, the above is only one implementation method and is not intended to limit the scope of the present application. Other methods may also be used when setting, for example, welding and other fixing methods.

[0029] For further details, see Figure 4 As shown, in this embodiment, the ball holder 3 is T-shaped, and the outer diameter of the vertical connecting section is smaller than the inner hole diameter of the spring 4; while the outer diameter of the horizontal connecting section is larger than the inner hole diameter of the spring 4. When installing, continue to refer to Figure 2 As shown, the vertical connecting section of the ball holder 3 is inserted into the inner hole of the spring 4, and after the insertion, the upper end of the spring 4 abuts against the lower surface of the horizontal connecting section of the ball holder 3; and the limiting groove 31 is opened on the upper end surface of the horizontal connecting section of the ball holder 3.

[0030] For further details, see Figure 5 As shown, in this embodiment, the valve core 5 is a stepped shaft, which includes an upper step section 52 and a lower step section 53; during installation, continue to refer to Figure 2As shown, after the valve core 5 is threadedly connected with the fourth step portion 114 through the lower step section 53 to which it belongs, the upper step section 52 extends into the third step portion 113; wherein, after installation is completed, the step surface between the upper step section 52 and the lower step section 53 is abutted against the step surface between the third step portion 113 and the fourth step portion 114, thereby limiting the valve core 5 in the valve body 1, thereby ensuring that the compression distance of the spring 4 is the same after each disassembly and maintenance, so that the force of the spring 4 on the ball 2 is constant, thereby maintaining the fat supply pressure within a relatively stable range; in addition, in this embodiment, the outer diameter of the upper step section 52 is smaller than the inner hole diameter of the spring 4, therefore, after the upper step section 52 extends into the third step portion 113, it is penetrated into the inner hole of the spring 4, at which time, the lower end of the spring 4 abuts against the step surfaces of the upper step section 52 and the lower step section 53.

[0031] For further details, see Figure 1 As shown, in this embodiment, the middle part of the outer surface of the valve body 1 is arranged in a diagonal hexagonal shape, so as to facilitate fixing or installing the valve body 1 by a wrench; and the lower part of the outer surface of the valve body 1 is provided with an external thread, through which the valve body 1 is connected to the equipment or pipeline.

[0032] For further details, see Figure 6 As shown, in this embodiment, a valve cap 6 is provided on the upper part of the valve body 1, and a sealing platform 61 and a vent hole 62 are provided on the valve cap 6, wherein two groups of vent holes 62 are provided, and the two groups of vent holes 62 are symmetrically distributed on the valve cap 6 with the sealing platform 61 as the center, and the vent holes 62 can be provided to release air when the valve cap 6 is disassembled; and the main function of the sealing platform 61 is to block the first step 111 through the sealing platform 61 when the valve cap 6 is installed on the valve body 1. In this embodiment, in order to facilitate the disassembly of the valve cap 6, the valve cap 6 and the valve body 1 are connected by threads.

[0033] The working principle of the utility model is as follows:

[0034] When in use, the grease injection check valve is installed in equipment or pipelines; when grease injection is required, the valve cap 6 is first removed from the valve body 1; then grease is injected into the valve body through the first step portion 111; and as the grease injection pressure increases and exceeds the force of the spring 4 on the ball 2, the ball 2 is pressed downward, that is, it moves toward the valve core 5. At this time, the spring 4 is further compressed, and the ball 2 releases the blockage of the connecting port between the second step portion 112 and the third step portion 113, so that the grease enters the third step portion 113 through the second step portion 112, and enters the through hole 51 in the valve core 5 through the third step portion 113, and is input into the equipment through the through hole 51.

[0035] When the grease injection is completed, the grease injection is stopped. At this time, the grease injection pressure acting on the ball 2 disappears, and the ball 2 moves upward under the action of the rebound force of the spring 4, that is, moves toward the second step portion 112, until the connecting port between the second step portion 112 and the third step portion 113 is blocked again to achieve a primary seal; then the valve cap 6 is reinstalled on the valve body 1, so that the sealing platform 61 blocks the first step portion 111 to achieve a secondary seal.

[0036] 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 valve with a limit position, characterized in that: The invention comprises a valve body (1), wherein a channel (11) is provided in the valve body (1) and passes through the upper and lower end surfaces thereof for allowing grease to pass through; a ball (2) capable of controlling the on-off of the ball (2) is provided in the channel (11); a ball holder (3) is provided at the lower end of the ball (2); a limit groove (31) adapted to the ball (2) is provided on the upper end surface of the ball holder (3); a spring (4) is provided at the lower end of the ball holder (3); a spring (4) is provided in the channel (11) at the lower end of the spring (4); A valve core (5) is arranged, and the spring (4) is restricted in the channel (11) by the valve core (5); and in the absence of external force, the spring (4) drives the ball (2) through the ball holder (3) to disconnect the channel (11); the valve core (5) and the channel (11) are threadedly connected, and a through hole (51) penetrating the upper and lower end surfaces of the valve core (5) is provided in the valve core (5), and the channel (11) can be connected to the outside through the through hole (51).

2. The grease injection valve with position limit according to claim 1 is characterized in that: The channel (11) is a stepped hole, which comprises, from top to bottom, a first step portion (111), a second step portion (112), a third step portion (113) and a fourth step portion (114); wherein the ball (2), the ball holder (3) and the spring (4) are all located in the third step portion (113), and the valve core (5) is threadedly connected to the fourth step portion (114).

3. The grease injection valve with position limit according to claim 2 is characterized in that: The upper end of the spring (4) and the ball holder (3) as well as the lower end of the spring (4) and the valve core (5) are both in contact connection.

4. The grease injection valve with position limit according to any one of claims 1 to 3, characterized in that: The ball holder (3) is T-shaped, and the outer diameter of its vertical connection section is smaller than the inner hole diameter of the spring (4); while the outer diameter of the horizontal connection section is larger than the inner hole diameter of the spring (4), and the limiting groove (31) is provided on the upper end surface of the horizontal connection section of the ball holder (3).

5. The grease injection valve with position limit according to claim 2 is characterized in that: The valve core (5) is a stepped shaft, which includes an upper step section (52) and a lower step section (53). After the valve core (5) is threadedly connected to the fourth step section (114) through the lower step section (53) to which it belongs, the upper step section (52) extends into the third step section (113).

6. The grease injection valve with position limit according to claim 5, characterized in that: The outer diameter of the upper step section (52) is smaller than the inner hole diameter of the spring (4).

7. The grease injection valve with position limit according to claim 1, characterized in that: The middle portion of the outer surface of the valve body (1) is arranged in a diagonal hexagonal shape; and the lower portion of the outer surface of the valve body (1) is provided with an external thread.

8. The grease injection valve with position limit according to claim 1, characterized in that: A valve cap (6) is arranged on the upper part of the valve body (1), and a sealing platform (61) and a vent hole (62) are arranged on the valve cap (6).

9. The grease injection valve with position limit according to claim 8, characterized in that: The valve cap (6) is threadedly connected to the valve body (1).

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