Split type grease injection nozzle

Abstract

The utility model discloses a split type grease injection nozzle which comprises an outlet section, a middle section and an inlet section, the outlet section and the inlet section are respectively provided with a hollow channel, one end of the outlet section is provided with a first external thread, and the other end of the outlet section is provided with a first internal thread. The middle section is provided with a first column body, a second column body and a third column body which are sequentially and coaxially distributed, the cross section sizes of the first column body, the second column body and the third column body are sequentially increased, the outer wall of the second column body is provided with a second external thread, and the second external thread is matched with the first internal thread and is in threaded connection with the first internal thread; an overflow hole communicated with the counter bore groove is formed in the side wall of the first column body, a spring and a ball are embedded in the counter bore groove, the inlet section is coaxially in butt joint with the end, away from the outlet section, of the middle section, the ball is limited in the middle section, and the elastic force of the spring is used for driving the ball to tend to move to block an inner hole of the inlet section. And the inner hole of the inlet section is blocked by the ball body under the action of the spring so as to realize non-return.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the grease injection head field, especially relates to a split type grease injection nozzle. BACKGROUND

[0002] A large number of ball valves are arranged along the natural gas pipeline, and the ball valve has an oil injection port (with internal thread), and the ball valve needs to be periodically or irregularly injected with grease to improve its lubricating property and sealing property, and when the ball valve is injected with oil, the oil injection hole needs to be prevented from leaking, so a special oil injection nozzle with one-way function is needed to inject lubricating oil, and the current oil injection nozzle is of an integral structure, which needs to be combined with a valve to inject oil into the ball valve, and when leakage occurs, the valve needs to be closed urgently and the oil injection operation needs to be stopped, but the structure is complex, and the operation flexibility is poor. SUMMARY

[0003] To solve the above technical problems, the utility model aims at providing a split type grease injection nozzle which is simple in structure, convenient to maintain and has a one-way valve function.

[0004] To achieve the above object, the utility model provides the following technical scheme: a split type grease injection nozzle, which comprises an outlet section, an intermediate section and an inlet section, the outlet section and the inlet section both have an internally hollow channel, one end of the outlet section is provided with a first external thread, the other end of the outlet section is provided with a first internal thread, the first external thread is used to be threadedly connected with the oil injection port of a ball valve, the intermediate section has a first cylinder, a second cylinder and a third cylinder which are coaxially distributed in sequence and have cross-sectional sizes increasing in sequence, the outer wall of the second cylinder is provided with a second external thread, the second external thread is threadedly connected with the first internal thread in cooperation, the thick end of the intermediate section is coaxially recessed with a counterbore groove, and the bottom of the counterbore groove is located in the first cylinder, the side wall of the first cylinder is provided with an overflow hole which is in communication with the counterbore groove, the counterbore groove is embedded with a spring and a ball, and the spring is located between the ball and the bottom wall of the counterbore groove, the inlet section is coaxially butted at one end of the intermediate section away from the outlet section, and the ball is limited in the intermediate section, and the elastic force of the spring is used to drive the ball to move to block the inner hole of the inlet section.

[0005] The above technical scheme has the beneficial effects that the inlet section, the intermediate section, the outlet section, the spring and the ball integrally form a split type grease injection nozzle with a non-return function, and when the grease injection pressure at the inlet section is small or exists, the ball blocks the inner hole of the inlet section under the action of the spring to play a non-return role.

[0006] In the above technical scheme, the inlet section is detachably butted at one end of the intermediate section away from the outlet section.

[0007] The beneficial effects of the above technical solution are that when the spring is damaged, the inlet section can be detached from the middle section, and the spring can be replaced.

[0008] In the above technical solution, the notch of the counterbore groove is provided with a second internal thread, one end of the inlet section is provided with a third external thread, and the third external thread is matched with and threadedly connected with the second internal thread, and the diameter of the ball is greater than the diameter of the inner hole of the inlet section but smaller than the inner diameter of the third cylinder.

[0009] The beneficial effects of the above technical solution are that the inlet section and the middle section are connected by thread connection, so that the middle section and the inlet section are convenient to disassemble and assemble.

[0010] In the above technical solution, the outer wall of one end of the inlet section away from the third external thread is in a regular hexagonal shape to form a first screwing part.

[0011] The beneficial effects of the above technical solution are that the inlet section is more convenient to tighten or loosen relative to the middle section.

[0012] In the above technical solution, the outer wall of the third cylinder is in a regular hexagonal shape to form a second screwing part.

[0013] The beneficial effects of the above technical solution are that the middle section is more convenient to tighten or loosen relative to the inlet section and the outlet section.

[0014] In the above technical solution, one end of the outlet section away from the first external thread is in a regular hexagonal shape to form a third screwing part.

[0015] The beneficial effects of the above technical solution are that the outlet section is more convenient to tighten or loosen relative to the middle section.

[0016] In the above technical solution, the overflow hole is provided with a plurality of overflow holes.

[0017] The beneficial effects of the above technical solution are that the overflow hole can be prevented from being blocked to affect the extrusion of grease in the counterbore groove.

[0018] In the above technical solution, the inner hole of the outlet section is a counterbore, the first internal thread is arranged at the thick end of the inner hole of the outlet section, and the inner wall of the thick end of the inner hole of the outlet section has an annular gap with the first cylinder. Under the action of an external force, the middle section is tightened relative to the inlet section to block the inner hole of the outlet section by the first cylinder, or the middle section is loosened to open the inner hole of the outlet section by the first cylinder.

[0019] The beneficial effects of the above technical solution are that the entire split type grease injection nozzle also has the function of a valve, and the entire split type grease injection nozzle internal passage can be closed or opened by tightening or loosening the middle section relative to the outlet section.

[0020] The end of the first column body away from the second column body is coaxially provided with an enlarged plug, and the diameter of the plug is greater than the diameter of the fine end of the outlet section inner hole.

[0021] The beneficial effects of the above technical solution are that when the middle section is tightened relative to the outlet section, the plug can better block the inner hole of the outlet section.

[0022] The plug is conical, and the tapered tip end is away from the first column body.

[0023] The beneficial effects of the above technical solution are that the structure is simple, and the blocking effect of the stepped junction of the outlet section inner hole is better. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a sectional view of the split type grease injection nozzle according to the embodiment of the present application;

[0025] Figure 2 It is an exploded view of the split type grease injection nozzle in a sectional view according to the embodiment of the present application;

[0026] Figure 3 It is a sectional view of the split type grease injection nozzle when the middle section is loosened relative to the outlet section according to the embodiment of the present application;

[0027] Figure 4 It is a sectional view of the split type grease injection nozzle when the ball is extruded to open the inner hole of the inlet section according to the embodiment of the present application.

[0028] In the figure: 1, outlet section; 11, first outer thread; 12, first inner thread; 13, third screwing part; 2, middle section; 21, first column body; 22, second column body; 23, third column body; 24, second outer thread; 25, counterbore groove; 26, overflow hole; 27, second inner thread; 28, second screwing part; 29, plug; 3, inlet section; 31, third outer thread; 32, first screwing part; 4, spring; 5, ball. DETAILED DESCRIPTION

[0029] The principles and features of the present application are described below in conjunction with the accompanying drawings, and the examples are used to explain the present application, but are not used to limit the scope of the present application. In the following paragraphs, the present application is described in more detail by way of example with reference to the accompanying drawings. The advantages and features of the present application will be more apparent from the following description and claims. It should be noted that the drawings are greatly simplified and use non-precise proportions, only to facilitate, clarify the purpose of assisting the description of the embodiments of the present application.

[0030] As shown in Figure 1 - Figure 4 The present embodiment provides a split type grease injection nozzle, which comprises an outlet section 1, an intermediate section 2 and an inlet section 3. The outlet section 1 and the inlet section 3 both have an internally hollow passage. One end of the outlet section 1 is provided with a first external thread 11, and the other end of the outlet section 1 is provided with a first internal thread 12. The first external thread 11 is used to be threadedly connected with a ball valve oil injection port. The intermediate section 2 has a first cylinder 21, a second cylinder 22 and a third cylinder 23 which are coaxially distributed in sequence and have cross-sectional sizes which increase in sequence. An external wall of the second cylinder 22 is provided with a second external thread 24 which is threadedly connected with the first internal thread 12. A thick end of the intermediate section 2 is coaxially recessed with a counterbore groove 25, and a bottom of the counterbore groove 25 is located in the first cylinder 21. A side wall of the first cylinder 21 is provided with an overflow hole 26 which is mutually penetrated with the counterbore groove 25. The counterbore groove 25 is embedded with a spring 4 and a ball 5, and the spring 4 is located between the ball 5 and a bottom wall of the counterbore groove 25. The inlet section 3 is coaxially butted at one end of the intermediate section 2 away from the outlet section 1, and limits the ball 5 in the intermediate section 2. The spring force of the spring 4 is used to drive the ball 5 to move to block the inner hole of the inlet section 3. In this way, the inlet section, the intermediate section, the outlet section, the spring and the ball integrally form a split type grease injection nozzle with a non-return function. When the grease injection pressure at the inlet section is small or exists, the ball blocks the inner hole of the inlet section under the action of the spring to play a non-return role.

[0031] As shown in Figure 1 - Figure 4 In the above technical solution, the inlet section 3 is detachably butted at one end of the intermediate section 2 away from the outlet section 1. In this way, when the spring is damaged, the inlet section can be detached relative to the intermediate section, and the spring can be replaced. Preferably, a second internal thread 27 is arranged at a slot opening of the counterbore groove 25. One end of the inlet section 3 is provided with a third external thread 31 which is threadedly connected with the second internal thread 27. The diameter of the ball 5 is greater than the diameter of the inner hole of the inlet section 3, but smaller than the inner diameter of the third cylinder 23. In this way, the inlet section and the intermediate section are butted in a threaded connection manner, which makes the intermediate section and the inlet section convenient to disassemble and assemble.

[0032] In the above technical solution, the outer wall of the inlet section 3 away from the third external thread 31 is hexagonal to form the first turning part 32, which makes it easier to tighten or loosen the inlet section relative to the middle section. The outer wall of the third column 23 is hexagonal to form the second turning part 28, which makes it easier to tighten or loosen the middle section relative to the inlet and outlet sections. The end of the outlet section 1 away from the first external thread 11 is hexagonal to form the third turning part 13, which makes it easier to tighten or loosen the outlet section relative to the middle section. Thus, the outlet section, middle section or inlet section can be flexibly turned with a wrench.

[0033] The overflow hole 26 described in the above technical solution is provided in multiple ways, which can prevent the overflow hole from being blocked and affecting the grease extrusion in the countersink.

[0034] like Figure 1 - Figure 4 As shown, in the above technical solution, the inner hole of the outlet section 1 is a countersunk hole, and the first internal thread 12 is provided at the coarse end of the inner hole of the outlet section 1 (preferably, the first internal thread is only provided at the end of the coarse end of the inner hole of the outlet section, so that a certain accommodation space is reserved for the first column in the coarse end of the inner hole of the outlet section). There is an annular gap between the inner wall of the coarse end of the inner hole of the outlet section 1 and the first column 21. Under the action of external force, tightening the middle section 2 relative to the inlet section 3 can block the inner hole of the outlet section 1 by the first column 21, or loosening the middle section 2 can open the inner hole of the outlet section 1 by the first column 21. In this way, the entire split grease nipple also has the function of a valve. Tightening or loosening the middle section relative to the outlet section can realize the closure or opening of the internal channel of the entire split grease nipple.

[0035] like Figure 1 - Figure 4 As shown, in the above technical solution, the end of the first column 21 away from the second column 22 is also coaxially provided with an enlarged plug 29. The diameter of the plug 29 is larger than the diameter of the narrow end of the inner hole of the outlet section 1. In this way, when the middle section is tightened relative to the outlet section, the plug can better seal the inner hole of the outlet section. Preferably, the plug 29 is conical (the diameter of its thick end is larger than the diameter of the narrow end of the inner hole of the outlet section 1), and its cone tip is away from the first column 21. Its structure is simple and has a better sealing effect on the stepped junction of the inner hole of the outlet section.

[0036] The split-type grease nipple provided in this embodiment has a backflow prevention function and a valve opening and closing function. It has a high degree of integration and is flexible in use. In addition, it is highly maintainable, and can be easily replaced when the spring is damaged or the ball is severely worn.

[0037] The above merely describes preferred embodiments of the present application, and is not intended to limit the present application in any form; any person skilled in the art can smoothly implement the present application according to the drawings shown in the specification and the above description; however, any person skilled in the art can make some changes, modifications and equivalent changes within the scope of the technical scheme of the present application, using the above disclosed technical content, and the equivalent embodiments of the present application are still within the protection scope of the technical scheme of the present application.

Claims

1. A split-type grease injection nozzle, characterized in that, The system includes an outlet section (1), an intermediate section (2), and an inlet section (3). Both the outlet section (1) and the inlet section (3) have internally hollow channels. One end of the outlet section (1) is provided with a first external thread (11), and the other end of the outlet section (1) is provided with a first internal thread (12). The first external thread (11) is used to connect with the oil injection port of the ball valve. The intermediate section (2) has a first column (21), a second column (22), and a third column (23) that are coaxially distributed and whose cross-sectional dimensions increase sequentially. The outer wall of the second column (22) is provided with a second external thread (24). The second external thread (24) mates with the first internal thread (12) and is threadedly connected. The thick end of segment (2) is coaxially recessed with a countersunk groove (25), and the bottom of the countersunk groove (25) is located inside the first column (21). An overflow hole (26) communicating with the countersunk groove (25) is provided on the side wall of the first column (21). A spring (4) and a ball (5) are embedded in the countersunk groove (25), and the spring (4) is located between the ball (5) and the bottom wall of the countersunk groove (25). The inlet segment (3) is coaxially connected to the end of the middle segment (2) away from the outlet segment (1) and limits the ball (5) inside the middle segment (2). The elastic force of the spring (4) is used to drive the ball (5) to move to block the inner hole of the inlet segment (3).

2. The split-type grease injection nozzle according to claim 1, characterized in that, The inlet section (3) is detachably connected to the end of the middle section (2) away from the outlet section (1).

3. The split-type grease injection nozzle according to claim 2, characterized in that, The countersunk groove (25) is provided with a second internal thread (27) at the groove opening, and a third external thread (31) is provided at one end of the inlet section (3). The third external thread (31) is engaged with the second internal thread (27) and threadedly connected. The diameter of the sphere (5) is larger than the diameter of the inner hole of the inlet section (3), but smaller than the inner diameter of the third column (23).

4. The split-type grease injection nozzle according to claim 3, characterized in that, The outer wall of the inlet section (3) away from the third external thread (31) is hexagonal to form the first turning part (32).

5. The split-type grease injection nozzle according to claim 1, characterized in that, The outer wall of the third column (23) is hexagonal to form the second twisting part (28).

6. The split-type grease injection nozzle according to claim 1, characterized in that, The end of the outlet section (1) away from the first external thread (11) is hexagonal to form the third twisting part (13).

7. The split-type grease injection nozzle according to claim 1, characterized in that, Multiple overflow holes (26) are provided.

8. The split-type grease injection nozzle according to claim 1, characterized in that, The inner hole of the outlet section (1) is a countersunk hole. The first internal thread (12) is located at the coarse end of the inner hole of the outlet section (1). There is an annular gap between the inner wall of the coarse end of the inner hole of the outlet section (1) and the first column (21). Under the action of external force, the intermediate section (2) is tightened relative to the inlet section (3) so that the inner hole of the outlet section (1) is blocked by the first column (21), or the intermediate section (2) is loosened so that the inner hole of the outlet section (1) is opened by the first column (21).

9. The split-type grease injection nozzle according to claim 8, characterized in that, The end of the first column (21) away from the second column (22) is also coaxially provided with an enlarged plug (29), the diameter of which is larger than the diameter of the narrow end of the inner hole of the outlet section (1).

10. The split-type grease injection nozzle according to claim 9, characterized in that, The plug (29) is conical, and its cone tip is away from the first column (21).

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