High-pressure oil pipe plug sleeve fixed-distance locking device

Abstract

The utility model provides a fixed-distance locking device for a top sleeve of a high-pressure oil pipe. The distance control structure is arranged on the bottom plate and used for controlling the distance between the top sleeve and the ball head, and the distance control structure comprises a first limiting block and a second limiting block which are arranged on the bottom plate at an interval; the adjustable supporting structure is arranged on the bottom plate, the adjustable supporting structure comprises a supporting assembly and an adjusting assembly, the adjusting assembly is arranged on the bottom plate, the supporting assembly can move on the adjusting assembly, and the adjusting assembly controls the distance between the supporting assembly and the second limiting block. According to the fixed-distance locking device for the top sleeve of the high-pressure oil pipe, the distance between the top sleeve and the spherical surface can be accurately controlled under the condition that the cleanliness is ensured, and the moment locking procedure of the top sleeve is completed.

Description

Technical Field

[0001] The utility model belongs to the technical field of high-pressure oil pipe assembly equipment, in particular to a high-pressure oil pipe head sleeve fixed-distance locking device. Background Art

[0002] The high-pressure oil pipe is a pipe connecting various sets in the common rail system. Its two ends are usually sealed with spherical surfaces and pressed against the corresponding parts to play a sealing role. The assembly of high-pressure oil pipes has high requirements for cleanliness. If burrs or other debris are accidentally passed into the oil pipe through the ball head, they may enter the injector and other parts during use, causing the internal precision parts to get stuck. The connection part of the high-pressure oil pipe usually adopts a top sleeve structure. The top sleeve is a part screwed on the rear end thread of the ball head of the high-pressure oil pipe. The distance from the ball head can be controlled by screwing on the oil pipe thread. Its main function is to transmit the pressing force of the oil pipe nut, and transmit it to the ball head through its interaction with the oil pipe thread, so that the ball head is pressed against the sealing cone surface to play a sealing role. In the actual assembly process, the on-site personnel usually control the number of threads exposed by the ball head according to their experience to confirm the position of the top sleeve, so as to avoid the situation where the other parts of the oil pipe nut interfere with the connected parts due to the wrong distance of the ball head extending from the oil pipe nut, and the ball head cannot be pressed tightly, resulting in oil leakage. However, due to the different experience of on-site personnel, the position of the top sleeve cannot be accurately guaranteed. Utility Model Content

[0003] The utility model provides a high-pressure oil pipe head sleeve fixed-distance locking device.

[0004] The utility model provides a high-pressure oil pipe head sleeve fixed distance locking device, comprising:

[0005] Base plate;

[0006] A distance control structure is arranged on the bottom plate and is used to control the distance between the top head sleeve and the ball head. The distance control structure includes a first limit block and a second limit block arranged on the bottom plate at intervals;

[0007] An adjustable support structure is arranged on the base plate, and the adjustable support structure includes a support component and an adjustment component. The adjustment component is arranged on the base plate, the support component can move on the adjustment component, and the adjustment component controls the distance between the support component and the second limit block.

[0008] Furthermore, the support assembly includes an upper rear support block and a lower rear support block, and the upper rear support block and the lower rear support block are matched and connected up and down, and an annular groove is formed in the middle.

[0009] Furthermore, a positioning pin is provided on the upper surface of the lower rear support block, and a pin hole is provided on the lower surface of the upper rear support block, and the upper rear support block is connected to the lower rear support block through the cooperation of the pin hole and the positioning pin.

[0010] Furthermore, there are two positioning pins, which are arranged on both sides of the upper surface of the lower rear support block, and there are two pin holes, which are arranged on both sides of the lower surface of the upper rear support block.

[0011] Furthermore, the adjustment assembly includes a support rod and a screw, the lower rear support block is provided with a mounting hole, the support rod passes through the mounting hole, the lower rear support block can move on the support rod, and both ends of the support rod are connected to the base plate by screws respectively.

[0012] Furthermore, there are two adjustment components, which are arranged on both sides of the lower rear support block.

[0013] Optionally, the top head cover includes a front top head cover and a rear top head cover, the second limiting block is provided with a slot, the rear top head cover is cooperatively connected with the slot, and the slot is used to limit the rear top head cover.

[0014] Optionally, a protective block is also included, and the ball head can be inserted into the protective block.

[0015] Furthermore, the protection block is fitted with the first limiting block.

[0016] Furthermore, the protection block is made of non-metallic material.

[0017] The beneficial effects brought by the utility model are as follows:

[0018] It can be seen from the above scheme that the embodiment of the utility model provides a high-pressure oil pipe head sleeve fixed distance locking device, which adopts a fixed distance control adjustment method for the final ball head size, and converts the distance from the front head sleeve section to the spherical surface, which requires actual control but is difficult to operate, into the distance between the rear head sleeve end face and the protection block, which is easy to operate. Compared with the conventional manual thread count control, on the one hand, the accuracy is higher, and on the other hand, it avoids the deviation of the actual ball head position caused by poor control of intermediate dimensions such as the starting position of the thread in actual processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram showing a distance locking device for a high-pressure oil pipe header sleeve according to an embodiment of the utility model;

[0020] Figure 2 A schematic top view of a high-pressure oil pipe head sleeve spacing locking device according to an embodiment of the utility model;

[0021] Figure 3A schematic diagram showing a high pressure oil pipe assembly according to an embodiment of the utility model;

[0022] Figure 4 A schematic diagram showing a second limit block of an embodiment of the utility model;

[0023] Figure 5 A schematic diagram of a support assembly according to an embodiment of the present utility model is shown.

[0024] In the figure, 1-base plate, 2-first limit block, 3-protection block, 4-ball head, 5-front head cover, 6-rear head cover, 7-second limit block, 8-oil pipe nut, 9-upper rear support block, 10-adjustment assembly, 11-screw, 12-high-pressure oil pipe assembly, 13-lower rear support block, 14-locating pin, 15-slot. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] like Figures 1 to 5 As shown, the utility model provides a high-pressure oil pipe head sleeve fixed distance locking device, comprising:

[0027] Bottom plate 1;

[0028] A distance control structure is arranged on the bottom plate 1 and is used to control the distance between the top head sleeve and the ball head 4. The distance control structure includes a first limit block 2 and a second limit block 7 which are arranged on the bottom plate 1 at intervals.

[0029] The adjustable support structure is arranged on the base plate 1. The adjustable support structure includes a support component and an adjustment component 10. The adjustment component 10 is arranged on the base plate 1. The support component can move on the adjustment component 10. The adjustment component 10 controls the distance between the support component and the second limit block 7.

[0030] It can be seen from the above scheme that the embodiment of the utility model provides a high-pressure oil pipe head sleeve fixed distance locking device, which adopts a fixed distance control adjustment method for the final ball head 4 size, and converts the distance from the cross section of the front head sleeve 5 to the spherical surface, which requires actual control but is difficult to operate, into the distance between the end face of the rear head sleeve 6 and the protective block 3, which is easy to operate. Compared with the conventional manual thread counting control, on the one hand, the accuracy is higher, and on the other hand, it avoids the deviation of the actual ball head 4 position caused by poor control of intermediate dimensions such as the starting position of the thread in actual processing.

[0031] The high-pressure oil pipe top sleeve fixed-distance locking device can realize accurate control of the distance between the top sleeve and the spherical surface while ensuring cleanliness, and complete the torque locking process of the top sleeve.

[0032] Furthermore, the support assembly includes an upper rear support block 9 and a lower rear support block 13, the upper rear support block 9 and the lower rear support block 13 are matched and connected up and down, and an annular groove is formed in the middle.

[0033] Specifically, the annular groove is used to fix and support the high-pressure oil pipe.

[0034] Furthermore, a positioning pin 14 is provided on the upper surface of the lower rear support block 13 , and a pin hole is provided on the lower surface of the upper rear support block 9 . The upper rear support block 9 is connected to the lower rear support block 13 through the pin hole and the positioning pin 14 .

[0035] Specifically, the upper rear support block 9 is connected to the lower rear support block 13 through the pin hole and the positioning pin 14. Rapid positioning can be achieved, which is not only convenient for disassembly, but also convenient for fixing.

[0036] Furthermore, there are two positioning pins 14 disposed on both sides of the upper surface of the lower rear support block 13 , and there are two pin holes disposed on both sides of the lower surface of the upper rear support block 9 .

[0037] Specifically, two positioning pins 14 are provided to cooperate with two pin holes, which can be more stable.

[0038] Furthermore, the adjustment assembly 10 includes a support rod and a screw 11, and the lower rear support block 13 is provided with a mounting hole. The support rod passes through the mounting hole, and the lower rear support block 13 can move on the support rod. Both ends of the support rod are connected to the base plate 1 by screws 11 respectively.

[0039] Specifically, after adjusting the distance between the support assembly and the second limit block 7, the support rod is moved toward the bottom plate 1 by tightening the screw 11, so that the lower rear support block 13 is fixed between the support rod and the bottom plate 1. The support assembly is fixed.

[0040] Furthermore, there are two adjustment components 10, which are arranged on both sides of the lower rear support block 13. The position of the support component can be fixed more stably.

[0041] Optionally, the top head cover includes a front top head cover 5 and a rear top head cover 6, the second limiting block 7 is provided with a card slot 15, the rear top head cover 6 is cooperatively connected to the card slot 15, and the card slot 15 is used to limit the rear top head cover 6.

[0042] Optionally, the high-pressure oil pipe top sleeve fixed distance locking device further comprises a protection block 3, and the ball head 4 can be inserted into the protection block 3. The protection block 3 is used to protect the ball head 4.

[0043] Furthermore, the protection block 3 is fitted with the first limit block 2. The protection block 3 is used to protect the ball head 4.

[0044] Furthermore, the protection block 3 is made of non-metallic material.

[0045] Specifically, the protection block 3 is made of non-metallic material, such as polyurethane, and the ball head 4 can be inserted into the protection block 3 , and an appropriate interference fit is used to ensure that the protection block 3 will not fall out of the ball head 4 easily.

[0046] like Figures 1 to 5 As shown, the utility model provides a high-pressure oil pipe head sleeve fixed distance locking device. The specific use method is as follows:

[0047] First, remove the oil pipe nut 8 from the rear head cover 6, then insert the protection block 3 into the ball head 4 and press it to the bottom. Loosen the screws 11, a total of 4, and adjust the adjustment assembly 10 to a suitable position to avoid interference with the oil pipe nut 8. After the position is adjusted, tighten the screws 11 (a total of 4).

[0048] After locking, remove the upper rear support block 9, and keep the positioning pin 14 installed on the lower rear support block 13. After the high-pressure oil pipe exits the oil pipe nut 8, loosen the front head cover 5 and the rear head cover 6, keep the gap at about 0.5-1mm, keep the front head cover 5 flush with the starting section of the thread, and in this state, place the high-pressure oil pipe on the high-pressure oil pipe head cover fixed distance locking device, wherein the rear head cover 6 is placed in the slot 15 of the second limit block 7 and fits, and the high-pressure oil pipe is placed in the annular groove of the lower rear support block 13. Insert the two positioning pins 14 into the upper rear support block 9, and use its gravity to press the high-pressure oil pipe assembly 12 to complete the installation.

[0049] Under the condition that the rear top cover 6 and the slot 15 of the second limit block 7 are kept in contact, the high-pressure oil pipe assembly 12 is rotated counterclockwise along the axis of the high-pressure oil pipe. At this time, the ball head 4 of the high-pressure oil pipe moves together with the protection block 3 toward the first limit block 2 until it presses against the first limit block 2 and applies a small torque, and only keeps in contact. At this time, the protection block 3 and the rear top cover 6 are respectively attached to the first limit block 2 and the second limit block 7 through the threaded action of the high-pressure oil pipe assembly 12. At this time, there is mutual friction between the protection block 3 and the first limit block 2, but the ball head 4 of the high-pressure oil pipe will not be damaged. Finally, use a special wrench to rotate the front top cover 5 and lock it with the rear top cover 6, and control the locking torque to the set value. Then remove the upper rear support block 9, remove the high-pressure oil pipe assembly 12, pull out the protection block 3, and complete the entire fixed-distance locking work.

[0050] In summary, the use of the non-metallic ball head 4 protection block 3 ensures the cleanliness of the entire assembly process on the one hand, and avoids collision or wear of the ball head 4 in the subsequent fixed-distance locking link on the other hand.

[0051] The method of adjusting the size of the final ball head 4 by fixed distance control is adopted to convert the distance from the end face of the front head cover 5 to the spherical surface, which needs to be actually controlled but is difficult to operate, into the distance from the end face of the rear head cover 6 to the protective block 3, which is easy to operate. Compared with the conventional manual thread counting control, on the one hand, the accuracy is higher, and on the other hand, the deviation of the actual ball head 4 position caused by the poor control of the intermediate dimensions such as the starting position of the thread in the actual processing is avoided.

[0052] By fixing the rear top sleeve 6 with the slot 15, the axial position of the top sleeve can be controlled to ensure the realization of the subsequent fixed-distance adjustment function. At the same time, the circumferential rotational freedom is controlled by the slot 15, which is easier to operate than the existing method of twisting two top sleeves.

[0053] The rear part adopts an adjustable support structure, which can adjust the distance between the support components in the front and rear directions, and is suitable for nuts of different lengths, thereby increasing the application range of the high-pressure oil pipe top sleeve fixed-distance locking device.

[0054] The above are preferred implementations of the present utility model. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present utility model. These improvements and modifications should also be regarded as the protection scope of the present utility model.

Claims

1. A high-pressure oil pipe head sleeve fixed distance locking device, characterized in that: include: Base plate; A distance control structure is arranged on the bottom plate and is used to control the distance between the top head sleeve and the ball head. The distance control structure includes a first limit block and a second limit block arranged on the bottom plate at intervals; An adjustable support structure is arranged on the base plate, and the adjustable support structure includes a support component and an adjustment component. The adjustment component is arranged on the base plate, the support component can move on the adjustment component, and the adjustment component controls the distance between the support component and the second limit block.

2. The high-pressure oil pipe head sleeve fixed distance locking device according to claim 1 is characterized in that: The support assembly comprises an upper rear support block and a lower rear support block, the upper rear support block and the lower rear support block are matched and connected up and down, and an annular groove is formed in the middle.

3. The high-pressure oil pipe head sleeve fixed distance locking device according to claim 2, characterized in that: The upper surface of the lower rear support block is provided with a positioning pin, and the lower surface of the upper rear support block is provided with a pin hole. The upper rear support block is connected to the lower rear support block through the cooperation of the pin hole and the positioning pin.

4. The high-pressure oil pipe head sleeve fixed distance locking device according to claim 3, characterized in that: There are two positioning pins, which are arranged on both sides of the upper surface of the lower rear support block, and there are two pin holes, which are arranged on both sides of the lower surface of the upper rear support block.

5. The high-pressure oil pipe head sleeve fixed distance locking device according to claim 4, characterized in that: The adjustment assembly includes a support rod and a screw. The lower rear support block is provided with a mounting hole. The support rod passes through the mounting hole. The lower rear support block can move on the support rod. Both ends of the support rod are connected to the base plate by screws respectively.

6. The high-pressure oil pipe head sleeve fixed distance locking device according to claim 5, characterized in that: There are two adjustment components, which are arranged on both sides of the lower rear support block.

7. The high-pressure oil pipe head sleeve fixed distance locking device according to claim 1, characterized in that: The top head cover includes a front top head cover and a rear top head cover, the second limiting block is provided with a slot, the rear top head cover is matched and connected with the slot, and the slot is used to limit the rear top head cover.

8. The high-pressure oil pipe head sleeve fixed distance locking device according to claim 1, characterized in that: A protection block is also included, and the ball head can be inserted into the protection block.

9. The high-pressure oil pipe head sleeve fixed distance locking device according to claim 8, characterized in that: The protection block is fitted with the first limiting block.

10. The high-pressure oil pipe head sleeve fixed distance locking device according to claim 8, characterized in that: The protection block is made of non-metallic material.

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