Equipment pipe orifice sealing detection device

Abstract

The utility model discloses an equipment pipe orifice sealing detection device, which belongs to the field of pressure vessel sealing detection and comprises a cylinder capable of extending into a pipe orifice, the diameter of the cylinder is smaller than the inner diameter of the pipe orifice, one end of the cylinder is provided with an end cover, and the end cover can be matched with a flange at the pipe orifice; a telescopic rod capable of stretching out and drawing back is arranged at the end, away from the end cover, of the column body, a gland is arranged at the end of the telescopic rod, the telescopic rod between the gland and the column body is sleeved with an expansion sleeve, and when the telescopic rod drives the gland to move towards the end cover, the expansion sleeve can abut against the inner wall of the pipe opening; the end cover is provided with a medium injection channel, and the medium injection channel can be communicated with the space between the column body and the pipe orifice, the sealing performance of the equipment pipe orifice can be detected only by inputting a small amount of medium through the structure, the medium usage amount and the input time are reduced, and the efficiency of sealing detection of the equipment pipe orifice is improved.

Description

Technical Field

[0001] The utility model relates to the field of pressure vessel sealing detection, in particular to an equipment pipe opening sealing detection device. Background Art

[0002] To ensure the reliability of the equipment, it is necessary to conduct a sealing test on the pressure vessel after it is manufactured, simulating the working conditions of the pressure vessel when it is delivered for use, and the test pressure is the same as the operating pressure after it is delivered for use. Because the welding process is mainly used in the manufacturing process of the pressure vessel, the main purpose of its testing is to inspect the welds and the butt sealing surfaces.

[0003] At present, the most commonly used pressure detection method is to use a blind flange installed on the pipe openings of each equipment of the pressure vessel to make the pressure vessel a sealed container, and then input the pressurized medium into the entire pressure vessel until the detection requirements are met. In this way, it is verified that the pressure vessel meets the sealing requirements and has no leakage.

[0004] When using this detection method, the volume of the medium input into the pressure vessel is the same as the equipment capacity. This process is time-consuming, requires a large amount of medium input, and consumes a lot of materials and manpower. It is only suitable for comprehensive inspection of the entire pressure vessel and cannot be used to perform sealing inspection on a certain equipment pipe opening of the pressure vessel.

[0005] In view of the above problems, the utility model designs and manufactures an equipment pipe opening sealing detection device to overcome the above defects. Utility Model Content

[0006] In order to solve the problems existing in the prior art, the utility model provides an equipment pipe mouth sealing detection device, which can perform sealing detection on the equipment pipe mouth by inputting only a small amount of medium, thereby reducing the medium usage and input time, and improving the efficiency of sealing detection on the equipment pipe mouth.

[0007] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is as follows: an equipment pipe opening sealing detection device, comprising a column that can be inserted into the pipe opening, the diameter of the column is smaller than the inner diameter of the pipe opening, and an end cover is provided at one end of the column, and the end cover can cooperate with the flange at the pipe opening;

[0008] The end of the column away from the end cover is provided with a telescopic rod that can be extended and retracted, and the end of the telescopic rod is provided with a gland, and an expansion sleeve is sleeved on the telescopic rod between the gland and the column. When the telescopic rod drives the gland to move toward the end cover, the expansion sleeve can abut against the inner wall of the pipe mouth;

[0009] The end cover is provided with a medium injection channel, and the medium injection channel can communicate with the space between the column and the pipe mouth.

[0010] Preferably, an axial piston cavity is provided in the column, a piston is provided in the axial piston cavity, the telescopic rod passes through the column and is connected to the piston, and the movement of the piston in the axial piston cavity can drive the telescopic rod to axially extend and retract.

[0011] Preferably, the axial piston chamber on one side of the piston is set as a return oil chamber, the return oil chamber is close to the end cover, and the axial piston chamber on the other side of the piston is set as a compression oil chamber;

[0012] The end cover is provided with a return oil channel, and the return oil channel is connected with the return oil chamber;

[0013] The axial piston chamber is also connected to a compression oil channel, the compression oil channel is arranged on the column and the end cover, and the communication port between the compression oil channel and the axial piston chamber is arranged on the side wall of the compression oil chamber;

[0014] The piston can be moved in the axial piston chamber by supplying pressure in the return oil channel or the compression oil channel.

[0015] Preferably, a limit platform is provided at one end of the telescopic rod close to the piston, and the diameter of the limit platform is larger than the diameter of the telescopic rod and smaller than the diameter of the piston;

[0016] The limit platform is located in the axial piston cavity, and when the telescopic rod moves in a direction away from the end cover, the limit platform can abut against the end of the axial piston cavity away from the end cover;

[0017] When the limiting platform abuts against the end of the axial piston cavity away from the end cover, the communication port between the compression oil passage and the axial piston cavity can still be communicated with the compression oil cavity.

[0018] Preferably, the end surface of the column away from the end cover is set as a tapered surface, and the end surface of the gland close to the column is also set as a tapered surface;

[0019] The two ends of the expansion sleeve are configured as concave conical surfaces, and the concave conical surfaces at the two ends can respectively cooperate with the conical surface on the column and the conical surface on the pressure cover.

[0020] Preferably, the gap between the outer wall of the expansion sleeve and the inner wall of the pipe opening is 1-2 mm.

[0021] Preferably, a large-diameter boss is provided at one end of the column away from the end cover, and the diameter of the large-diameter boss is slightly smaller than the inner diameter of the pipe mouth.

[0022] Preferably, the gland is detachably connected to the end of the telescopic rod.

[0023] Preferably, a sealing ring is provided on the column at the position where the telescopic rod passes through, and a sealing ring is also provided on the side wall of the piston to elastically abut against the axial piston cavity;

[0024] And / or, a sealing gasket is provided between the end cover and the flange at the pipe mouth.

[0025] Preferably, it also includes a hydraulic system, which is connected to a compression oil supply pipe, a return oil supply pipe and a water pressure test pipe, the compression oil supply pipe is connected to the compression oil channel, the return oil supply pipe is connected to the return oil channel, and the water pressure test pipe is connected to the medium injection channel.

[0026] The utility model is beneficial in that:

[0027] 1. The utility model can realize the fixed-point detection of the pipe mouth position, and the detection is flexible. It not only effectively reduces the use of the pressurized medium, but also improves the detection efficiency, and effectively saves the personnel's emptying and cleaning work intensity after pressurization.

[0028] 2. The utility model can be reasonably adjusted according to the size of the pipe orifice, and has high versatility. Because the expansion sleeve has high elasticity, the detection device can be applied to pipe orifices within a certain size range. If the size of the pipe orifice exceeds the size applicable range of the detection device, the versatility of the detection device can be improved by changing the expansion sleeve and the replaceable gland.

[0029] 3. The two end faces of the expansion sleeve of the utility model, the end face of the cylinder in contact with the expansion sleeve, and the end face of the gland are arranged as mutually matched tapered faces, so that the sealing area is increased, which is conducive to a tight seal. At the same time, when the telescopic rod moves toward the end cover, that is, the expansion sleeve is compressed, the tapered face is conducive to the expansion sleeve expanding in the radial direction, so that it can effectively fit and seal with the inner wall of the pipe mouth. When the telescopic rod moves away from the end cover, that is, the pressure on the expansion sleeve is released, the tapered face is conducive to the expansion sleeve reducing in the radial direction, which is convenient for removing the detection device. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A schematic diagram of a pipe opening sealing detection device of an equipment being located in a pipe opening;

[0031] Figure 2 It is a schematic diagram of an expansion sleeve of a device for detecting the sealing of a pipe opening of an equipment, with both ends of the expansion sleeve being concave conical surfaces;

[0032] Figure 3 It is a partial schematic diagram of the limiting platform of the present invention abutting against the end of the axial piston cavity;

[0033] Figure 4 It is a schematic diagram of the column and end cover of the utility model;

[0034] Figure 5 It is a schematic diagram of the telescopic rod and the piston of the utility model;

[0035] Figure 6 It is a schematic diagram of the gland of the utility model.

[0036] In the figure: 1-column, 2-end cover, 3-telescopic rod, 4-pressure cover, 5-expansion sleeve, 6-large diameter boss, 7-piston, 8-compression oil channel, 9-return oil channel, 10-medium injection channel, 11-axial piston chamber, 12-hydraulic system, 13-compression oil supply pipe, 14-return oil supply pipe, 15-water pressure test pipe, 16-sealing ring, 31-limiting platform. DETAILED DESCRIPTION

[0037] In order to facilitate understanding by those skilled in the art, the present invention is further described below in conjunction with the accompanying drawings.

[0038] like Figures 1 to 6 As shown, a device for detecting the sealing of a pipe opening of an equipment includes a column 1 which can be inserted into the pipe opening, wherein the diameter of the column 1 is smaller than the inner diameter of the pipe opening, and when the column 1 is inserted into the pipe opening, there is a certain space between the column 1 and the pipe opening.

[0039] An end cover 2 is provided at one end of the column 1, and the end cover 2 can cooperate with the flange at the pipe mouth. A plurality of light holes are provided on the circumference of the end cover 2, and the positions of the light holes correspond to the light holes on the flange at the pipe mouth. Bolts pass through the end cover 2 and the light holes on the flange at the pipe mouth, and cooperate with nuts to fix the equipment pipe mouth sealing detection device on the flange at the pipe mouth.

[0040] The utility model provides a telescopic rod 3 that can be extended and retracted at one end of the column 1 away from the end cover 2, and a pressure cap 4 is provided at the end of the telescopic rod 3. An expansion sleeve 5 is sleeved on the telescopic rod 3 between the pressure cap 4 and the column 1. When the telescopic rod 3 drives the pressure cap 4 to move toward the end cover 2, the expansion sleeve 5 can abut against the inner wall of the pipe mouth, thereby completing the sealing at this place;

[0041] A medium injection channel 10 is provided on the end cover 2, and the medium injection channel 10 can connect the space between the column 1 and the pipe mouth. By injecting the pressurized medium through the medium injection channel 10, the fixed-point pressure detection of the pipe mouth position can be realized. In order to ensure the sealing, a sealing gasket is preferably provided between the end cover 2 and the flange at the pipe mouth.

[0042] The above structure not only effectively reduces the usage of pressurized medium, but also improves the detection efficiency, and effectively saves the intensity of emptying and cleaning operations after pressurization.

[0043] The utility model has an axial piston cavity 11 in the column 1, a piston 7 in the axial piston cavity 11, the telescopic rod 3 passes through the column 1 and is connected to the piston 7, and the movement of the piston 7 in the axial piston cavity 11 can drive the telescopic rod 3 to axially extend and retract. Specifically, the axial piston chamber 11 on one side of the piston 7 is set as a return oil chamber, and the return oil chamber is close to the end cover 2. The axial piston chamber 11 on the other side of the piston 7 is set as a compression oil chamber. The end cover 2 is provided with a return oil channel 9, and the return oil channel 9 is connected with the return oil chamber. The axial piston chamber 11 is also connected with a compression oil channel 8. The compression oil channel 8 is arranged on the column 1 and the end cover 2. The connecting port between the compression oil channel 8 and the axial piston chamber 11 is arranged on the side wall of the compression oil chamber. The piston 7 can be moved in the axial piston chamber 11 by supplying pressure in the return oil channel 9 or the compression oil channel 8. In order to ensure the sealing of the piston 7 when it moves in the axial piston chamber 11, a sealing ring 16 is preferably provided at the position on the column 1 where the telescopic rod 3 penetrates, and a sealing ring 16 is also provided on the side wall of the piston 7 to elastically abut against the axial piston chamber 11.

[0044] A limit platform 31 is preferably provided at one end of the telescopic rod 3 close to the piston 7, and the diameter of the limit platform 31 is larger than the diameter of the telescopic rod 3 and smaller than the diameter of the piston 7; the limit platform 31 is located in the axial piston cavity 11, and when the telescopic rod 3 moves away from the end cover 2, the limit platform 31 can abut against the end of the axial piston cavity 11 away from the end cover 2. Specifically, when the limit platform 31 abuts against the end of the axial piston cavity 11 away from the end cover 2, the connecting port between the compression oil channel 8 and the axial piston cavity 11 can still be connected to the compression oil cavity. The utility model ensures that the compression oil cavity can still be connected to the compression oil channel 8 when the telescopic rod 3 is extended through the limit platform 31.

[0045] The end face of the column 1 away from the end cover 2 is preferably set as a tapered surface, the end face of the pressure cover 4 close to the column 1 is also preferably set as a tapered surface, and the two ends of the expansion sleeve 5 are set as concave tapered surfaces, and the concave tapered surfaces at both ends can respectively cooperate with the tapered surface on the column 1 and the tapered surface on the pressure cover 4.

[0046] The two end faces of the expansion sleeve 5 of the utility model, the end face of the column 1 in contact with the expansion sleeve 5, and the end face of the pressure cover 4 are set to cooperate with each other, so that the sealing area is increased, which is conducive to the tight sealing. At the same time, when the telescopic rod 3 moves toward the end cover 2, that is, the expansion sleeve 5 is compressed, the tapered surface is conducive to the expansion of the expansion sleeve 5 in the radial direction, so that it can effectively fit and seal with the inner wall of the pipe mouth. When the telescopic rod 3 moves away from the end cover 2, that is, the pressure on the expansion sleeve 5 is released, the tapered surface is conducive to the expansion sleeve 5 in the radial direction. Reduce, it is easy to remove the detection device. Of course, the two end faces of the specific expansion sleeve 5 can also be planes, and the corresponding end faces of the column 1 in contact with the expansion sleeve 5 and the end faces of the pressure cover 4 are also set as planes. When the expansion sleeve 5 is compressed, the expansion sleeve 5 expands in the radial direction and can also effectively fit and seal with the inner wall of the pipe mouth.

[0047] The gap between the outer wall of the expansion sleeve 5 and the inner wall of the pipe mouth is preferably 1-2 mm. The value of the gap is determined by the compression deformation and hardness of the composite material. The expansion sleeve 5 is preferably made of an organic composite material with high elasticity and good recovery.

[0048] A large-diameter boss 6 is preferably provided at one end of the column 1 away from the end cover 2. The diameter of the large-diameter boss 6 is slightly smaller than the inner diameter of the pipe mouth, ensuring that the detection device can be pre-positioned when it is extended into the pipe mouth, making it convenient for the bolts to pass through the light holes on the end cover 2 and the flange at the pipe mouth.

[0049] The gland 4 is preferably detachably connected to the end of the telescopic rod 3 to facilitate replacement of the expansion sleeve 5. Specifically, because the expansion sleeve 5 has high elasticity, the detection device can be applied to pipe openings within a certain size range. If the size of the pipe opening exceeds the size applicable range of the detection device, the expansion sleeve 5 and the replaceable gland 4 can be changed to improve the versatility of the detection device.

[0050] It also includes a hydraulic system 12, which is connected to a compression oil supply pipe 13, a return oil supply pipe 14 and a water pressure test pipe 15. The compression oil supply pipe 13 is connected to the compression oil channel 8, the return oil supply pipe 14 is connected to the return oil channel 9, and the water pressure test pipe 15 is connected to the medium injection channel 10. The hydraulic system 12 can control the medium to enter a specific pipe, thereby completing the squeezing, relaxation and sealing detection functions of the expansion sleeve 5.

[0051] The specific working steps of this utility model are:

[0052] Use bolts and nuts to connect the detection device and the equipment pipe flange through the light holes on the end cover 2 and the flange at the pipe mouth;

[0053] The hydraulic system 12 is operated to provide pressure by compressing the oil supply pipe 13, so that the telescopic rod 3 moves toward the end cover 2, thereby driving the gland 4 to compress the expansion sleeve 5. The expansion action is achieved by compressing the expansion sleeve 5. The expansion action of the expansion sleeve 5 is close to the inner wall of the pipe mouth, so that a separate sealed chamber is formed;

[0054] The medium required for the working test is input through the water pressure test pipe 15 to perform sealing detection on the pipe opening;

[0055] After the inspection is completed, the hydraulic medium is input through the return oil supply pipe 14 to push the telescopic rod 3 to move toward the gland 4, thereby releasing the pressure on the expansion sleeve 5.

[0056] It should be understood that the purpose of these embodiments is only to illustrate the utility model and is not intended to limit the protection scope of the utility model. In addition, it should also be understood that after reading the technical content of the utility model, those skilled in the art can make various changes, modifications and / or variations to the utility model, and all of these equivalent forms also fall within the protection scope defined by the claims attached to this application.

Claims

1. A device for detecting the sealing of a pipe opening of an equipment, characterized in that: It comprises a column (1) that can be inserted into a pipe orifice, the diameter of the column (1) being smaller than the inner diameter of the pipe orifice, an end cover (2) being provided at one end of the column (1), and the end cover (2) being able to cooperate with a flange at the pipe orifice; The column (1) is provided with a telescopic rod (3) at one end away from the end cover (2), and a pressure cover (4) is provided at the end of the telescopic rod (3). An expansion sleeve (5) is sleeved on the telescopic rod (3) between the pressure cover (4) and the column (1). When the telescopic rod (3) drives the pressure cover (4) to move toward the end cover (2), the expansion sleeve (5) can abut against the inner wall of the pipe mouth; The end cover (2) is provided with a medium injection channel (10), and the medium injection channel (10) can communicate with the space between the column (1) and the pipe mouth.

2. The equipment pipe opening sealing detection device according to claim 1, characterized in that: An axial piston cavity (11) is provided in the column (1), a piston (7) is provided in the axial piston cavity (11), the telescopic rod (3) passes through the column (1) and is connected to the piston (7), and the movement of the piston (7) in the axial piston cavity (11) can drive the telescopic rod (3) to axially extend and retract.

3. The equipment pipe opening sealing detection device according to claim 2, characterized in that: The axial piston chamber (11) on one side of the piston (7) is set as a return oil chamber, the return oil chamber is close to the end cover (2), and the axial piston chamber (11) on the other side of the piston (7) is set as a compression oil chamber; The end cover (2) is provided with a return oil passage (9), and the return oil passage (9) is communicated with the return oil chamber; The axial piston chamber (11) is also connected to a compression oil passage (8), the compression oil passage (8) is arranged on the column (1) and the end cover (2), and the communication port between the compression oil passage (8) and the axial piston chamber (11) is arranged on the side wall of the compression oil chamber; The piston (7) can be moved in the axial piston chamber (11) by supplying pressure in the return oil channel (9) or the compression oil channel (8).

4. The equipment pipe opening sealing detection device according to claim 3, characterized in that: A limit platform (31) is provided at one end of the telescopic rod (3) close to the piston (7); the diameter of the limit platform (31) is larger than the diameter of the telescopic rod (3) and smaller than the diameter of the piston (7); The limiting platform (31) is located in the axial piston cavity (11), and when the telescopic rod (3) moves in a direction away from the end cover (2), the limiting platform (31) can abut against an end of the axial piston cavity (11) away from the end cover (2); When the limiting platform (31) abuts against the end of the axial piston chamber (11) away from the end cover (2), the communication port between the compression oil passage (8) and the axial piston chamber (11) can still communicate with the compression oil chamber.

5. The equipment pipe opening sealing detection device according to claim 1, characterized in that: An end surface of the column (1) away from the end cover (2) is configured as a tapered surface, and an end surface of the pressure cover (4) close to the column (1) is also configured as a tapered surface; Both ends of the expansion sleeve (5) are provided with concave conical surfaces, and the concave conical surfaces at both ends can respectively cooperate with the conical surface on the column (1) and the conical surface on the pressure cover (4).

6. The equipment pipe opening sealing detection device according to claim 1, characterized in that: The gap between the outer wall of the expansion sleeve (5) and the inner wall of the pipe opening is 1-2 mm.

7. The equipment pipe opening sealing detection device according to claim 1, characterized in that: A large-diameter boss (6) is provided at one end of the column (1) away from the end cover (2), and the diameter of the large-diameter boss (6) is slightly smaller than the inner diameter of the pipe mouth.

8. The equipment pipe opening sealing detection device according to claim 1, characterized in that: The pressure cover (4) is detachably connected to the end of the telescopic rod (3).

9. The equipment pipe opening sealing detection device according to claim 2, characterized in that: A sealing ring is provided on the column (1) at the position where the telescopic rod (3) passes through, and a sealing ring is also provided on the side wall of the piston (7) to elastically abut against the axial piston cavity (11); And / or, a sealing gasket is provided between the end cover (2) and the flange at the pipe mouth.

10. The equipment pipe opening sealing detection device according to claim 3, characterized in that: The invention also comprises a hydraulic system (12), wherein the hydraulic system (12) is connected to a compression oil supply pipe (13), a return oil supply pipe (14) and a water pressure test pipe (15), wherein the compression oil supply pipe (13) is connected to the compression oil channel (8), the return oil supply pipe (14) is connected to the return oil channel (9), and the water pressure test pipe (15) is connected to the medium injection channel (10).

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