Grease injection nozzle dredging device

Abstract

The utility model relates to the technical field of valve grease injection nozzle cleaning devices in oil fields, in particular to a grease injection nozzle dredging device. The grease injection nozzle dredging device comprises a nut matched with grease injection external threads of a grease injection nozzle, a nut center hole is formed in the center of the nut, a connecting rod is installed in the nut center hole through threads, and a jacking head is arranged at the end, located in the nut, of the connecting rod. The side, opposite to the connecting rod, of the jacking head is provided with a jacking face used for being matched with a check ball of the grease injection nozzle in a jacking mode, the maximum diameter of the jacking head is not larger than the diameter of a grease injection hole of the grease injection nozzle, hole channels are formed in the connecting rod and the jacking head, inner ports of the hole channels are located in the nut, and outer ports of the hole channels are communicated with the external environment of the nut. The connecting rod is rotated to drive the jacking face of the jacking head to jack the check ball, meanwhile, dirt on the check ball falls off, the dirt is discharged out of the hole channel through gas in the valve cavity, damage to the check ball is effectively avoided, and normal grease injection is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of valve grease injection nozzle cleaning devices in oil fields, and particularly relates to a grease injection nozzle dredging device. Background Art

[0002] During the frequent opening and closing process of a valve, internal leakage is likely to occur. When there is internal leakage, the valve needs to be maintained regularly. Generally, an appropriate amount of special lubricating grease is injected into the valve cavity through a grease injection nozzle to protect the seal. When the lubricating grease deteriorates, generally, a cleaning liquid needs to be injected to discharge the old lubricating grease and then new lubricating grease or sealing grease is injected again.

[0003] The structure of the grease injection nozzle is as Figure 1 shown, including a grease injection joint body. Valve external threads 8 and grease injection external threads 9 are respectively arranged on the outer walls at both ends of the grease injection joint body. The valve body is connected to the grease injection nozzle through the valve external thread 8, and the grease injection tool is connected to the grease injection nozzle through the grease injection external thread 9. The central hole inside the grease injection joint body forms a grease channel, and the grease channel is a stepped hole. The end close to the grease injection external thread 9 is a grease injection hole 13, and the aperture of the grease injection hole 13 is smaller than the aperture of the end close to the valve external thread 8. A check ball 10 is arranged in the stepped hole at the end close to the valve external thread 8, and one end of a spring 11 abuts against the check ball 10, and the other end of the spring 11 is fixed at the bottom of the grease injection joint body. When grease injection is not required, the grease injection hole 13 is blocked by a cap 12. When using the grease injection nozzle to inject grease for sealing or lubricating the valve, the check ball inside the grease injection nozzle is often stuck by cured impurities in the sealing grease or lubricating grease, resulting in the inability of the check ball to move. In actual operation, the operator generally uses a relatively hard object to push the check ball, such as a thick iron wire, a small screwdriver, etc. Since operating under pressure is likely to pose a safety hazard to the operator, and secondly, using a relatively hard object to push the check ball is likely to damage the check ball. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a grease injection nozzle dredging device to solve the technical problem that the check ball in the grease injection nozzle is easily stuck by cured impurities in the lubricating grease or sealing grease and cannot move.

[0005] In order to achieve the above purpose, the technical solution of a grease injection nozzle dredging device provided by the utility model is as follows:

[0006] A grease injection nozzle dredging device includes a nut that matches the external grease injection thread of the grease injection nozzle. A nut central hole is opened at the center of the nut. A connecting rod is installed in the nut central hole through a thread. One end of the connecting rod located inside the nut is provided with a pressing head. The side of the pressing head facing away from the connecting rod has a pressing surface for pressing and cooperating with the check valve ball of the grease injection nozzle. The maximum diameter of the pressing head is not greater than the diameter of the grease injection hole of the grease injection nozzle. A hole is opened in the connecting rod and the pressing head. The inner port of the hole is located inside the nut, and the outer port communicates with the external environment of the nut.

[0007] Beneficial effects: Compared with the prior art, the present utility model provides a new grease injection nozzle dredging device. When dredging operation is required, the nut in the device is tightened on the external grease injection thread of the grease injection nozzle. By rotating the connecting rod and the pressing head, they move into the grease injection hole of the grease injection nozzle. The check valve ball in the grease injection nozzle is pushed by the pressing surface on the pressing head. At the same time, the solidified lubricating grease and sealing grease are stirred and shed. The shed lubricating grease and sealing grease debris are discharged from the hole under the action of the gas in the valve cavity. During the dredging process, it can not only ensure that the check valve ball is not damaged, but also discharge the dirt through the air pressure action from the grease channel, which is beneficial to the normal grease injection work.

[0008] Further, the maximum diameter of the pressing head is smaller than the diameter of the grease injection hole of the grease injection nozzle, and the inner port is located on the outer peripheral surface of the pressing head.

[0009] Further, the pressing head includes a frustum-shaped head, and the pressing surface is located on the side facing away from the large end of the frustum-shaped head; the pressing head also includes a cylindrical tail at the end of the head close to the connecting rod, and the inner port is located at the tail.

[0010] Further, the hole is an inverted T-shaped hole.

[0011] Further, one end of the pressing head close to the connecting rod is in blocking cooperation with the nut.

[0012] Further, the outer end of the connecting rod is provided with a screwing head for cooperating with a tool.

[0013] Further, the screwing head is detachable.

[0014] Further, the nut is a hexagonal nut.

[0015] Further, the connecting rod and the pressing head are of an integrally formed structure. Description of the Drawings

[0016] Figure 1 It is a structural schematic diagram of the grease injection nozzle;

[0017] Figure 2 It is a structural schematic diagram of a grease injection nozzle dredging device of the present utility model;

[0018] Figure 3 is Figure 2 The top view of the grease injection nozzle dredging tool in the middle.

[0019] In the figure: 1, nut; 2, connecting rod; 3, pressing head; 4, screwing head; 5, through hole; 6, hole passage; 7, nut center hole, 8, valve external thread; 9, grease injection external thread; 10, check ball; 11, spring; 12, cap; 13, grease injection hole. Specific implementation mode

[0020] The features and performance of the present utility model will be further described in detail below in conjunction with the embodiments.

[0021] The dredging device to be protected by the present utility model mainly aims at the grease injection nozzle. When the grease injection nozzle is used for daily maintenance of the valve cavity, the check ball in the grease injection nozzle is often stuck by impurities generated by the solidification of lubricating grease or sealing grease and cannot move, resulting in the inability to inject grease. In actual operation, directly using a steel wire or a small screwdriver to push the check ball will easily damage the check ball, and the operation under pressure poses a certain safety hazard to the operator.

[0022] Therefore, the present application provides a new grease injection nozzle dredging device. The main idea is: using the grease injection external thread of the grease injection nozzle to combine the dredging device with the grease injection nozzle. In the state where the two are combined, the grease injection nozzle is dredged through the device, and the part cooperating with the check ball is set as the mating surface during this process, so as to prevent the check ball from being damaged.

[0023] Based on the above idea, the basic scheme of the present utility model is: install a connecting rod on a nut that can cooperate with the grease injection external thread of the grease injection nozzle, design a pressing head with a pressing surface at one end of the connecting rod, and use the pressing surface of the pressing head to press against the check ball in the grease injection nozzle. At the same time, arrange a hole passage inside the connecting rod and the pressing head, and discharge the dirt debris shed from the check ball through the air pressure in the valve cavity through the hole passage.

[0024] The following will be described through different embodiments:

[0025] A grease injection nozzle dredging device, such as Figure 1 and Figure 2As shown in the figure, it includes a nut 1 that matches the grease injection external thread 9 of the grease injection nozzle. A nut central hole 7 is opened at the center of the nut 1. The nut central hole is specifically set as a threaded hole. A connecting rod 2 is installed in the nut central hole 7 through threads. At least one section of the connecting rod is provided with external threads, and it is matched with the threads in the nut central hole through the external threads. One end of the connecting rod 2 located inside the nut 1 is provided with a pressing head 3. One side of the pressing head 3 facing away from the connecting rod 2 has a pressing surface for pressing and cooperating with the check ball 10 of the grease injection nozzle. The maximum diameter of the pressing head 3 is not greater than the diameter of the grease injection hole 13 of the grease injection nozzle. A hole 6 is opened in the connecting rod 2 and the pressing head 3. The inner port of the hole 6 is located inside the nut 1, and the outer port communicates with the external environment of the nut 1. When the utility model is used for dredging operation, the nut 1 is sleeved on the grease injection external thread 9 of the grease injection nozzle through threads and tightened. Then, by rotating the connecting rod 2, it moves in the nut central hole 7. The connecting rod 2 drives the pressing head 3 to probe into the grease channel of the grease injection nozzle. The check ball 10 is pushed by the pressing surface on the pressing head 3. At the same time, the lubricating oil and sealing grease solidified on the check ball 10 fall off. Under the action of the air pressure in the valve cavity, the fallen lubricating grease and sealing grease debris are discharged from the hole 6 to the outside of the grease injection nozzle. By using the above device to dredge the grease injection nozzle, it can well avoid damage to the check ball 10 inside the grease injection nozzle. At the same time, since the dredging operation is carried out in a sealed state, it is beneficial to ensure the personal safety of the operator.

[0026] In the above embodiment, there are two situations where the maximum diameter of the pressing head 3 is not greater than the diameter of the grease injection hole 13 of the grease injection nozzle. One is that the maximum diameter of the pressing head is less than the diameter of the grease injection hole of the grease injection nozzle, and the inner port is located on the outer peripheral surface of the pressing head. The other is that the maximum diameter of the pressing head 3 is equal to the diameter of the grease injection hole 13 in the grease injection nozzle. At this time, the inner port of the hole needs to be set on the conical surface or the lower end plane of the pressing head (the position in contact with the check ball needs to be avoided). Through the above two methods, the dirt debris can enter the hole and be discharged under the action of the air pressure in the valve cavity, and the hole will not be blocked.

[0027] The present application provides a more optimal embodiment. As Figure 2 shown, the pressing head 3 includes a conical head, and the pressing surface is located on the side facing away from the large end of the conical head; the pressing head 3 further includes a cylindrical tail located at one end of the head close to the connecting rod 2, and the inner port is located at the tail. The pressing head 3 is designed to be composed of a conical head and a cylindrical tail, and the inner port is designed at the cylindrical tail. Such a design is beneficial to the discharge of impurities, debris or grease in the grease channel, and prevents the inner port of the hole from being blocked.

[0028] In one embodiment, the channel is L-shaped, and the inner port of the channel is located at the cylindrical tail of the pressing head. The purpose of discharging dirt can also be achieved through the L-shaped channel. However, since there is only one inner port, the efficiency of discharging dirt is not high. Therefore, the present application provides a more optimal embodiment, as Figure 2 shown, the channel 6 is an inverted T-shaped hole. By designing the channel 6 as a "T-shaped hole", two (or more) inner ports can be formed at the cylindrical tail of the pressing head 3, which is beneficial to the faster discharge of dirt. In other embodiments, the channel 6 can also be designed as a Y-shaped hole, and two inner ports are formed at the cylindrical tail of the pressing head 3 to discharge dirt.

[0029] The present application provides a more optimal embodiment, as Figure 2 shown, one end of the pressing head 3 close to the connecting rod 2 is in blocking cooperation with the nut 1. By the blocking cooperation between the tail of the pressing head 3 and the nut 1, the connecting rod can be effectively prevented from falling off from the central hole 7 of the nut.

[0030] The present application provides a more optimal embodiment, as Figure 2 shown, a screwing head 4 for cooperating with a tool is provided at the outer end of the connecting rod 2. By designing the screwing head 4, it is beneficial for the operator to use the corresponding tool during the dredging of the grease injection nozzle, which is more labor-saving and convenient.

[0031] The present application provides a more optimal embodiment, as Figure 3 shown, the screwing head 4 is detachable. By designing the screwing head 4 to be detachable, it is beneficial for later maintenance and replacement of parts. Specifically, in this embodiment, the screwing head 4 is designed as a hollow cube structure with a through hole 5 at the center, which is convenient for configuring the corresponding tool.

[0032] The present application provides a more optimal embodiment, as Figure 3 shown, the nut 1 is a hexagonal nut with one end open, and an internal thread matching the external thread 9 of the grease injection is provided on the inner wall of the opening. By setting the nut 1 as a structure with one end open and providing an internal thread on the inner wall of the opening, when in use, the cover 12 of the grease injection nozzle is removed, and the nut 1 is tightened on the external thread 9 of the grease injection, a sealed space can be formed to prevent the leakage of air pressure and the occurrence of safety accidents.

[0033] In one embodiment, the connecting rod 2 and the pressing head 3 are connected by threading or welding. Connecting by threading or welding can also achieve driving the pressing head 3 to move and press the check valve ball 10 through the connecting rod 2. However, since there is a large amount of lubricant or sealant in the grease injection nozzle, by inserting the pressing head 3 connected by threading or welding into the grease injection nozzle, the lubricant and sealant seep into the threads or the weld, and it is not easy to clean and maintain after the dredging is completed. For this reason, the present application provides a more optimal embodiment in which the connecting rod 2 and the pressing head 3 are integrally formed. By manufacturing the connecting rod 2 and the pressing head 3 through an integral forming process, there are no gaps and protrusions between the pressing head 3 and the connecting rod 2, which is convenient for maintenance after use.

[0034] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. The patent protection scope of the present invention is subject to the claims. Any equivalent structural changes made by using the description and drawings of the present invention should be equally included in the protection scope of the present invention.

Claims

1. A grease injection nozzle dredging device, characterized in that: It includes a nut that matches the grease injection external thread of the grease injection nozzle, a nut center hole is opened at the center of the nut, a connecting rod is installed in the nut center hole through a thread, a top pressure head is provided at one end of the connecting rod located in the nut, the top pressure head has a top pressure surface on the side facing away from the connecting rod for top pressure cooperation with the check ball of the grease injection nozzle, the maximum diameter of the top pressure head is not larger than the grease injection hole diameter of the grease injection nozzle, a channel is opened in the connecting rod and the top pressure head, the inner port of the channel is located in the nut, and the outer port is communicated with the external environment of the nut.

2. The grease nozzle dredging device according to claim 1 is characterized in that: The maximum diameter of the top pressure head is smaller than the diameter of the grease injection hole of the grease injection nozzle, and the inner port is located on the outer peripheral surface of the top pressure head.

3. The grease nozzle dredging device according to claim 2 is characterized in that: The top pressure head comprises a frustum-shaped head, and the top pressure surface is located on the side facing away from the large end of the frustum-shaped head; The ram head also includes a cylindrical tail portion located at the head portion and close to one end of the connecting rod, and the inner port is located at the tail portion.

4. The grease nozzle dredging device according to claim 1 is characterized in that: The hole is an inverted T-shaped hole.

5. The grease nozzle dredging device according to claim 3 is characterized in that: One end of the pressing head close to the connecting rod is matched with the nut for stopping.

6. The grease nozzle dredging device according to claim 5, characterized in that: The outer end of the connecting rod is provided with a screwing head for cooperating with a tool.

7. The grease nozzle dredging device according to claim 6, characterized in that: The screwing head is detachable.

8. The grease nozzle dredging device according to claim 1, characterized in that: The nut is a hexagonal nut.

9. The grease nozzle dredging device according to claim 7, characterized in that: The connecting rod and the top pressure head are an integrally formed structure.

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