Negative pressure test clamp for sealing performance of conical surface of oil pipe joint

Abstract

The utility model discloses an oil pipe joint conical surface sealing negative pressure test clamp, and specifically relates to the negative pressure test clamp technology field, the oil pipe joint conical surface sealing negative pressure test clamp comprises a base station, the base station is provided with a housing, one side of the housing is connected with a vacuum pump, the housing is internally provided with a positioning assembly, one side of the positioning assembly is connected with a reinforcing disc, and the reinforcing disc is provided with a clamping groove. A sealing cover is installed at one end of the shell, a pressure sensor is installed on the inner side of the sealing cover and connected with a display screen installed on the outer side of the sealing cover, a clamping and fixing assembly is installed on the base table, a connector body is clamped between the clamping and fixing assembly and the shell, and a conical groove is formed in one end of the shell. A negative pressure testing cavity is formed in the inner side of the conical groove, an exhaust hole is formed in the inner wall of the negative pressure testing cavity, and the air exhaust end of the vacuum pump is connected with the exhaust hole in a sealed mode. The device has the advantages that the connector can be accurately positioned and fixed, the sealing performance can be visually detected, negative pressure is formed through efficient pumping and drainage, and the test accuracy and efficiency are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to negative pressure test fixture technical field, more specifically, the utility model relates to a kind of oil pipe joint conical surface tightness negative pressure test fixture. BACKGROUND

[0002] In the manufacturing field of oil pipe and related equipment, the quality control of oil pipe joint is the key link to ensure the safe and stable operation of the whole conveying system. The sealing performance of the conical surface of the oil pipe joint after production directly determines its performance in actual use. Once the conical surface sealing has defects, a series of serious problems may occur after the oil pipe system is put into operation. For example, during oil exploitation and transportation, oil pipe joint leakage can cause crude oil leakage, resulting in huge economic losses and serious pollution to the surrounding environment; in the fuel supply system of automobile engine, poor sealing of oil pipe joint can cause fuel leakage, which not only reduces fuel efficiency and increases fuel consumption, but also may cause fire accidents and other safety accidents.

[0003] At present, in the sealing detection link after joint production, although there are many detection technologies and equipment, there are still many problems. Some traditional detection methods, such as simple water pressure test or air pressure test, can only be detected under normal pressure or positive pressure environment, which is quite different from the negative pressure environment of oil pipe in actual work, and cannot truly simulate the sealing performance of joint under actual working conditions, resulting in limited reference value of detection results. The structure of part of existing test equipment is complex, the operation is cumbersome, and the professional skill requirement of operator is high, which not only increases the detection cost, but also reduces the detection efficiency.

[0004] Therefore, the present application provides a kind of oil pipe joint conical surface tightness negative pressure test fixture. Utility model content

[0005] In order to overcome the above-mentioned defects of the prior art, the utility model provides a kind of oil pipe joint conical surface tightness negative pressure test fixture to solve the problems raised in the above background.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a kind of oil pipe joint conical surface tightness negative pressure test fixture, including base, the shell is installed on the base, the vacuum pump is connected on the shell side, the positioning assembly is installed in the shell, the reinforcing disc is connected on the positioning assembly side, the sealing cover is installed on the shell end, the pressure sensor is installed in the sealing cover inner side, the pressure sensor is connected with the display screen installed on the sealing cover outer side, the clamping and fixing assembly is installed on the base, the joint body is clamped between the clamping and fixing assembly and the shell.

[0007] Preferably, the housing is provided with a tapered slot at one end, a negative pressure test cavity is formed in the inner side of the tapered slot, exhaust holes are formed in the inner wall of the negative pressure test cavity, and the vacuum pump exhaust end is in sealed connection with the exhaust holes.

[0008] Preferably, the joint body comprises a tapered head and an end pipe, and the tapered head is provided with the end pipe at one side.

[0009] Preferably, the positioning assembly comprises a fixed plate, a supporting rod, a positioning head, a first through hole and a second through hole, the fixed plate is installed in the housing, a plurality of supporting rods are connected at one side of the fixed plate, the positioning head is connected to the plurality of supporting rods, the first through hole is formed between adjacent supporting rods, and the second through hole is formed in the fixed plate.

[0010] Preferably, a third through hole is formed in the reinforcing disc, the third through hole is coaxially arranged with the second through hole, and the pressure sensor is arranged at one side of the third through hole.

[0011] Preferably, the clamping and fixing assembly comprises a cylinder, a push disc and a plug, the push disc is installed at the output end of the cylinder, the plug is coaxially connected to the push disc, a rubber sleeve is sleeved on the push disc and the plug, and the rubber sleeve has a T-shaped structure in cross section.

[0012] The technical effects and advantages of the utility model are as follows:

[0013] 1. The fixed plate, the supporting rod and the positioning head of the positioning assembly are matched with each other, the coaxial positioning of the tapered head of the oil pipe joint can be realized, the close fit of the tapered surface of the tapered head and the inner wall of the tapered slot of the housing is ensured, the clamping and fixing assembly drives the push disc and the plug through the cylinder, and the T-shaped rubber sleeve is matched, so that the joint body can be stably fixed, the sealing property of the end pipe is improved, the detection error caused by unstable fixation or air leakage of the end pipe is avoided, and the accuracy of the test is ensured.

[0014] 2. The negative pressure value in the negative pressure test cavity can be displayed in real time through the arrangement of the pressure sensor and the display screen, the change of the display number of the display screen in the set time is observed after the set negative pressure value is reached, the sealing property of the tapered surface of the oil pipe joint can be directly judged, the display number increases to indicate air leakage and poor sealing property of the tapered surface, and the display number does not change to indicate good sealing property, so that the detection process is simple and intuitive.

[0015] 3. The tapered slot, the negative pressure test cavity and the exhaust hole on the housing are in sealed connection with the vacuum pump exhaust end, the structure design is reasonable, the air in the test cavity can be efficiently exhausted, a stable negative pressure environment can be quickly formed, and the test efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a whole structure schematic view of the utility model.

[0017] Figure 2This is a schematic diagram of the cross-sectional structure of this utility model.

[0018] Figure 3 This is a schematic diagram of the internal structure of the shell of this utility model.

[0019] Figure 4 This is a schematic diagram of the positioning component of this utility model.

[0020] Figure 5 This is a schematic diagram of the clamping and fixing component of this utility model.

[0021] Figure 6 This is a schematic diagram of the connector body of this utility model.

[0022] The attached figures are labeled as follows: 1. Base; 2. Housing; 3. Vacuum pump; 4. Sealing cover; 5. Display screen; 6. Clamping and fixing assembly; 601. Cylinder; 602. Push plate; 603. Plug; 7. Connector body; 701. Conical head; 702. End tube; 8. Positioning assembly; 801. Fixing plate; 802. Support rod; 803. Positioning head; 804. First port; 805. Second port; 9. Reinforcing plate; 10. Pressure sensor; 11. Conical groove; 12. Negative pressure test chamber; 13. Exhaust port. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] As attached Figures 1-5 The negative pressure test fixture for the conical sealing performance of an oil pipe joint, as shown, includes a base 1, a housing 2 mounted on the base 1, a vacuum pump 3 connected to one side of the housing 2, a positioning component 8 installed inside the housing 2, a reinforcing plate 9 connected to one side of the positioning component 8, a sealing cover 4 mounted at one end of the housing 2, a pressure sensor 10 mounted inside the sealing cover 4, a display screen 5 mounted on the outside of the sealing cover 4 connected to the pressure sensor 10, and a clamping and fixing component 6 mounted on the base 1, with a joint body 7 clamped between the clamping and fixing component 6 and the housing 2.

[0025] In implementation, the joint body 7 is inserted into the shell 2 from one end of the shell 2, centered and clamped by the positioning assembly 8, and then clamped and fixed by the clamping and fixing assembly 6, so that the joint body 7 is fixed in the shell 2. Then the air in the shell 2 is exhausted by the vacuum pump 3, and when the pressure sensor 10 reaches a certain negative pressure value observed by the display screen 5, the vacuum pump 3 stops working. Then whether the display screen 5 shows a change in a set time is observed. If the number increases, it means that the sealing performance of the joint body 7 is poor. If there is no change, it means that the sealing performance is excellent.

[0026] The shell 2 is provided with a tapered groove 11 at one end, and a negative pressure test cavity 12 is formed in the inner side of the tapered groove 11. An exhaust hole 13 is formed in the inner wall of the negative pressure test cavity 12. The exhaust end of the vacuum pump 3 is sealingly connected with the exhaust hole 13.

[0027] The joint body 7 comprises a tapered head 701 and an end pipe 702. The tapered head 701 is provided with the end pipe 702 on one side.

[0028] The positioning assembly 8 comprises a fixed plate 801, a supporting rod 802, a positioning head 803, a first through hole 804 and a second through hole 805. The fixed plate 801 is installed in the shell 2. A plurality of supporting rods 802 are connected to one side of the fixed plate 801. The positioning head 803 is connected to the plurality of supporting rods 802. The first through hole 804 is formed between adjacent supporting rods 802. The second through hole 805 is formed in the fixed plate 801.

[0029] The reinforcing disc 9 is provided with a third through hole coaxially arranged with the second through hole 805. The pressure sensor 10 is arranged on one side of the third through hole.

[0030] In implementation, the tapered head 701 is inserted into the tapered groove 11, and the positioning head 803 is coaxially positioned with the tapered head 701, so that the tapered surface of the tapered head 701 can be attached to the inner wall of the tapered groove 11. When the end pipe 702 is sealed, a closed space is formed on one side of the tapered head 701. Thus, when the vacuum pump 3 is running, the closed space can be negatively pumped and exhausted. During the pumping and exhausting process, the pressure sensor 10 changes with the change of the negative pressure of the closed space, and the negative pressure value is displayed in real time by the display screen 5. When a certain negative pressure is reached, the vacuum pump 3 stops running. If the display screen 5 shows an increase in the number, it means that the tapered head 701 leaks, so that the tapered surface of the tapered head 701 cannot be sealed with the inner wall of the tapered groove 11, and thus the sealing performance of the tapered surface of the tapered head 701 is poor. If the display screen 5 shows no change with the change of time, it means that the sealing performance of the tapered surface of the tapered head 701 is good.

[0031] The clamping and fixing assembly 6 comprises a cylinder 601, a pushing disc 602 and a plug 603, the pushing disc 602 is installed at the output end of the cylinder 601, the plug 603 is coaxially connected to the pushing disc 602, rubber sleeves are sleeved on the pushing disc 602 and the plug 603, and the rubber sleeves are in T-shaped structure in cross section.

[0032] In specific implementation, the pushing disc 602 and the plug 603 can be moved to approach or move away from the end pipe 702 through the operation of the cylinder 601, the tapered head 701 can be extruded and fixed in the tapered groove 11 when the plug 603 is inserted in the end pipe 702 and the pushing disc 602 pushes the end pipe 702, thereby avoiding the sealing test after clamping and fixing, and the sealing property of the end pipe 702 can be improved through the rubber sleeves during the process of fixing the joint body 7, thereby avoiding the air leakage of the end pipe 702 and causing the detection error, and the accuracy of the test is improved.

[0033] The above only describes the preferred embodiments of the utility model and is not used for limiting the utility model, and any modification, equivalent replacement, improvement and the like made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A negative pressure test fixture for tubing connection cone face tightness, comprising a base (1), characterized in that: The base (1) is provided with a shell (2), one side of the shell (2) is connected with a vacuum pump (3), the shell (2) is provided with a positioning assembly (8), one side of the positioning assembly (8) is connected with a reinforcing disc (9), one end of the shell (2) is provided with a sealing cover (4), the inner side of the sealing cover (4) is provided with a pressure sensor (10), the pressure sensor (10) is connected with a display screen (5) mounted on the outer side of the sealing cover (4), the base (1) is provided with a clamping and fixing assembly (6), the clamping and fixing assembly (6) is clamped with a connector body (7) between the shell (2).

2. The negative pressure test fixture of claim 1, wherein: One end of the shell (2) is provided with a tapered groove (11), the inner side of the tapered groove (11) is provided with a negative pressure test cavity (12), the inner wall of the negative pressure test cavity (12) is provided with an exhaust hole (13), the exhaust end of the vacuum pump (3) is sealingly connected with the exhaust hole (13).

3. The negative pressure test fixture of claim 2, wherein: The connector body (7) comprises a tapered head (701) and an end pipe (702), one side of the tapered head (701) is provided with an end pipe (702).

4. The negative pressure test fixture of claim 3, wherein: The positioning assembly (8) comprises a fixed plate (801), a supporting rod (802), a positioning head (803), a first through hole (804) and a second through hole (805), the fixed plate (801) is mounted in the shell (2), one side of the fixed plate (801) is connected with a plurality of supporting rods (802), the plurality of supporting rods (802) are jointly connected with the positioning head (803), the first through hole (804) is formed between adjacent supporting rods (802), and the second through hole (805) is formed in the fixed plate (801).

5. The negative pressure test fixture of claim 4, wherein: The reinforcing disc (9) is provided with a third through hole, the third through hole is coaxially arranged with the second through hole (805), and the pressure sensor (10) is arranged on one side of the third through hole.

6. The negative pressure test fixture of claim 5, wherein: The clamping and fixing assembly (6) comprises a pneumatic cylinder (601), a push disc (602) and a plug (603), the output end of the pneumatic cylinder (601) is provided with the push disc (602), the push disc (602) is coaxially connected with the plug (603), the push disc (602) and the plug (603) are sleeved with a rubber sleeve, and the rubber sleeve is in T-shaped structure in cross section.

Images