Intelligent sensor for pipeline sealing performance detection

Abstract

The invention belongs to the technical field of pipeline sealing performance detection, and particularly relates to an intelligent sensor for pipeline sealing performance detection, which comprises a detection frame, a sealing cover body, a compressor and a bearing unit, the detection frame is used for bearing a splicing pipe to be detected; the sealing cover body is slidably connected in the detection frame, and the splicing pipe penetrates through the two ends of the sealing cover body; by means of the first sealing cover, the second sealing cover and the bearing unit which slide relatively in the detection frame and can be combined, the first sealing cover and the second sealing cover slide relatively in the detection frame, and a sealing cover body formed after combination can contain the splicing part of the splicing pipe in the sealing cover body. The air bag can be radially extruded to generate self-adaptive deformation by controlling air inflation of the air bag, the inner wall of the air bag and the outer surface of the splicing pipe form dynamic sealing contact, and the splicing pipe formed by splicing the pipelines with the two ends separated can be subjected to sealing performance detection regardless of the length, is not limited by the length of the splicing pipe and has high adaptability.

Description

Technical Field

[0001] The present invention belongs to the technical field of pipeline sealing detection, and specifically relates to an intelligent sensor for pipeline sealing detection. Background Art

[0002] In industrial pipeline systems, airtightness detection is a core link to ensure safe operation. Especially for spliced pipelines in fields such as oil, natural gas, and chemicals, their connection points (such as welds, flanges, and clamps) are prone to becoming high-incidence areas of leakage due to mechanical stress, corrosion, or installation errors.

[0003] A Chinese patent with the publication number CN119164568A discloses an industrial metal pipeline sealing detection device and detection method, including a pillar. Sealing modules are installed on one side of the pillar. Metal pipelines are installed at opposite ends of the two sealing modules. Upper unit detection pipes and lower unit detection pipes are arranged on the upper and lower sides of the metal pipeline; in the present invention, by filling normal-temperature gas inside the metal pipeline, the first pressure sensor detects the air pressure inside the metal pipeline, filling normal-temperature gas into the space between the metal pipeline and the cylinder body, and after a period of time, the first pressure sensor measures the air pressure again. By comparing the air pressures on both sides, if the two air pressures do not exceed the threshold, it indicates that the metal pipeline has good sealing performance. When the two air pressures exceed the threshold, it indicates that the metal pipeline has poor sealing performance. This setting compares the two sets of air pressure data detected at the same temperature, which can effectively detect the sealing quality of the metal pipeline and avoid the influence of different air temperatures on air pressure.

[0004] Currently, in the prior art, the pressure decay method is used to detect the pipeline sealing performance. However, in the above prior art, the provided sealing module and the support device for fixing the metal pipeline can only be applicable to types with fixed dimensions, lacking adaptability. Especially for spliced pipes with insufficient length after splicing, which are relatively long in themselves, it is more inapplicable to use the equipment disclosed in the above prior art for detection. Therefore, the above prior art obviously has limitations.

[0005] Therefore, the present invention provides an intelligent sensor for pipeline sealing detection. Summary of the Invention

[0006] In order to make up for the deficiencies of the prior art and solve at least one technical problem proposed in the background art.

[0007] The technical solution adopted by the present invention to solve its technical problems is as follows: An intelligent sensor for pipeline sealing detection according to the present invention includes:

[0008] A detection frame for carrying the spliced pipe to be detected;

[0009] A sealing cover body, slidably connected inside the detection frame, and the spliced pipe penetrates through both ends of the sealing cover body;

[0010] The compressor is arranged in the detection frame and is connected with the sealing cover through a pipeline;

[0011] A supporting unit, used to support the axis of the spliced ​​pipe to coincide with the axis of the sealing cover, and the supporting unit is arranged in the detection frame;

[0012] The sealing cover body includes a first sealing cover and a second sealing cover, and the first sealing cover and the second sealing cover are respectively slidably connected to the two ends of the detection frame; when the first sealing cover and the second sealing cover slide relatively and merge in the detection frame, the interior is enclosed to form a closed air cavity, and air bags are symmetrically arranged at both ends of the air cavity.

[0013] Preferably, the sealing cover body further comprises an air inlet arranged at the bottom of the first sealing cover, and the air inlet is communicated with the compressor pipeline; connecting rods are fixedly connected to the side walls of the first sealing cover and the second sealing cover corresponding to the airbag;

[0014] The detection frame is provided with a clearance groove; the first sealing cover and the second sealing cover are respectively fixedly connected with a receiving slide plate via a connecting rod; the receiving slide plate is slidably connected in the clearance groove;

[0015] A sliding rod is fixedly connected inside the giving way groove, and the sliding rod is parallel to the displacement path of the sealing cover body, and the sealing cover body is slidably connected to the sliding rod via the receiving slide plate.

[0016] Preferably, a central groove is further provided inside the detection frame, and the supporting unit is arranged in the central groove;

[0017] The supporting unit comprises a central support plate, and the bottom of the central support plate is rotatably connected to the side wall of the central groove via a rotating shaft.

[0018] Preferably, a gear is fixed to the rotating shaft at the bottom of the central support plate, and a rack is meshingly connected to the bottom of the gear; the rack passes through the detection frame and extends outside the detection frame; when the first sealing cover and the second sealing cover slide relatively and merge, the rack is pushed inward, and the rack cooperates with the gear to adjust the central support plate to shrink into the central groove.

[0019] Preferably, two central support plates are provided and arranged symmetrically, and the gears on the bottom rotating shafts of the two central support plates are arranged alternately; a through groove is opened on the side wall of the detection frame, and the through groove is parallel to the give-way groove, and the through groove is located obliquely below the give-way groove; the two symmetrically arranged through grooves are arranged alternately correspondingly.

[0020] Preferably, a block is fixedly connected to the side wall of the central support plate, and the block is a triangular structure;

[0021] A movable groove is also provided in the detection frame, in which a connecting shaft is slidably connected, and a first spring is fixedly connected between one end of the connecting shaft and the bottom surface of the movable groove; a stop block is fixedly connected to the other end of the connecting shaft; when the central support plate is deflected and contracted in the central groove, the stop block abuts against the locking block to limit the central support plate.

[0022] Preferably, a connecting groove is provided in the detection frame, and the connecting groove is connected with the central groove;

[0023] An L-shaped rod is fixedly connected to the side wall of the stop block, and the L-shaped rod is movably connected in the central groove and the connecting groove; one end of the L-shaped rod is fixedly connected to the stop block, and the other end is fixedly connected to the cone block.

[0024] Preferably, a slide groove connected to the connecting groove is provided on the surface of the detection frame, and a spring rod is fixed in the slide groove, a push block is slidably connected to the spring rod, and the inclined surfaces on both sides of the push block cooperate with the cone block.

[0025] Preferably, the connecting groove and the sliding groove cross each other, and the push block and the spring rod are located in the middle of the two L-shaped rods and the cone block.

[0026] Preferably, a paddle is fixedly connected to the rack, and the paddle is located outside the detection frame; when the first sealing cover and the second sealing cover slide relative to each other and merge, the receiving slide squeezes the paddle and drives the rack to be pushed inward.

[0027] The beneficial effects of the present invention are as follows:

[0028] 1. The intelligent sensor for pipeline sealing detection described in the present invention detects the first sealing cover and the second sealing cover that slide relatively in the detection frame and can be merged. When the spliced ​​pipe is sealed, the spliced ​​pipe can be placed on the supporting unit, and the supporting unit is used to temporarily support the spliced ​​pipe. Then the first sealing cover and the second sealing cover that are symmetrically arranged on the left and right are controlled to slide relatively in the detection frame and finally merge together. The sealing cover body formed after the merger can contain the splicing part of the spliced ​​pipe in the sealing cover body, and the two ends of the spliced ​​pipe can pass through the airbags at the ends of the first sealing cover and the second sealing cover respectively. After the first sealing cover and the second sealing cover are merged, the airbag can be controlled to inflate to make the airbag radially squeeze to produce adaptive deformation, so that the inner wall of the airbag forms a dynamic sealing contact with the outer surface of the spliced ​​pipe. The spliced ​​pipe formed by splicing the pipes separated at both ends can be tested for sealing regardless of its length, is not limited by the length of the spliced ​​pipe, and has strong adaptability.

[0029] 2. The intelligent sensor for pipeline sealing detection described in the present invention utilizes the meshing of a rack and a gear. During the relative sliding of the first sealing cover and the merging of the second sealing cover, the rack drives the gear to rotate, thereby causing the central support plate to deflect and shrink in the central groove, thereby avoiding affecting the merging of the first sealing cover and the second sealing cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The present invention will be further described below in conjunction with the accompanying drawings.

[0031] Figure 1 is a stereogram of the present invention;

[0032] Figure 2 is a front view of the present invention;

[0033] Figure 3 is a side view of the present invention;

[0034] Figure 4 is a top view of the present invention;

[0035] Figure 5 yes Figure 4 Sectional view at AA in the middle;

[0036] Figure 6 yes Figure 5 A partial stereogram of

[0037] Figure 7 yes Figure 4 Sectional view at the middle BB;

[0038] Figure 8 is a three-dimensional diagram of the supporting unit in the present invention;

[0039] Figure 9 is a three-dimensional diagram of the sealing cover body of the present invention;

[0040] Figure 10 It is a partial stereoscopic diagram of the sealing cover body in the present invention;

[0041] In the figure: 100, detection frame; 101, slide bar; 102, give way groove; 103, central groove; 104, connecting groove; 105, movable groove; 106, slide groove; 107, through groove; 200, first sealing cover; 210, second sealing cover; 211, air inlet; 230, air bag; 240, connecting rod; 250, air cavity; 260, receiving slide plate; 300, compressor; 400, splicing tube; 500, central support plate; 510, gear; 520, rack; 521, paddle plate; 530, block; 540, stop block; 541, connecting shaft; 542, first spring; 550, cone block; 560, L-shaped rod; 600, push block; 610, spring rod. DETAILED DESCRIPTION

[0042] In order to make the technical means, creative features, achieved purposes and effects realized by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0043] As Figures 1 to 10 shown, an intelligent sensor for detecting the sealing performance of a pipeline according to an embodiment of the present invention includes a detection frame 100, a sealing cover body, a compressor 300 and a supporting unit; the detection frame 100 is used to carry a spliced pipe 400 to be detected; the sealing cover body is slidably connected in the detection frame 100, and the spliced pipe 400 penetrates through both ends of the sealing cover body; the compressor 300 is arranged in the detection frame 100 and is connected to the sealing cover body through a pipeline; the supporting unit is used to support the axis of the spliced pipe 400 to coincide with the axis of the sealing cover body, and the supporting unit is arranged in the detection frame 100; the sealing cover body includes a first sealing cover 200 and a second sealing cover 210, and the first sealing cover 200 and the second sealing cover 210 are respectively slidably connected to both ends of the detection frame 100; when the first sealing cover 200 and the second sealing cover 210 slide relative to each other and merge in the detection frame 100, a closed air cavity 250 is formed inside, and air bags 230 are symmetrically arranged at both ends of the air cavity 250.

[0044] In the prior art, the provided sealing module and the supporting device for fixing metal pipes can only be applicable to types with fixed dimensions, lacking adaptability. Especially for the spliced pipe 400 after splicing due to insufficient length, its own length is relatively long, and it is more inapplicable to be detected by using the devices disclosed in the prior art. Therefore, the above prior art obviously has limitations. In an embodiment of the present invention, a first sealing cover 200 and a second sealing cover 210 that slide relatively within the detection frame 100 and can be combined are adopted. When detecting the sealing performance of the spliced pipe 400 after splicing, the spliced pipe 400 can be placed on the supporting unit, and the supporting unit is used to temporarily support the spliced pipe 400. Then, the first sealing cover 200 and the second sealing cover 210 arranged symmetrically on the left and right are controlled to slide relatively within the detection frame 100 and finally combined together. The formed sealing cover body after combination can contain the splicing part of the spliced pipe 400 within the sealing cover body, and both ends of the spliced pipe 400 can respectively pass through the air bags 230 at the ends of the first sealing cover 200 and the second sealing cover 210. After the first sealing cover 200 and the second sealing cover 210 are combined, the air bags 230 can be controlled to inflate to generate self-adaptive deformation by radial extrusion, so that the inner wall of the air bag 230 forms dynamic sealing contact with the outer surface of the spliced pipe 400. At the same time, a stable air pressure gradient is maintained inside the air chamber 250 through the compressor 300, so that the contact pressure between the air bag 230 and the pipe wall of the spliced pipe 400 is evenly distributed. Based on this double-sealing structure, a continuous closed space is constructed around the spliced pipe 400, effectively isolating the interference of the external environment, providing a constant-pressure and dust-free sealing environment for the internal detection operation. Then, by means of the air flow sensor, it is detected whether there is air flow at both ends of the spliced pipe 400 outside the sealing cover body, and thus it can be judged whether there are voids in the spliced pipe 400, that is, the sealing performance of the spliced pipe 400 is detected. Thus, for the spliced pipe 400 formed by splicing two separated pipes at both ends, its sealing performance can be detected regardless of its length, without being limited by the length of the spliced pipe 400, and it has strong adaptability. In addition, both ends of the sealing cover body are open, that is, the position of the air bag 230 can also be adaptively adjusted according to the diameter of the spliced pipe 400. Therefore, it can be applicable to the spliced pipe 400 with a certain diameter range and unlimited length for sealing performance detection;

[0045] It should be noted that rubber rings are arranged on the opposite surfaces of the first sealing cover 200 and the second sealing cover 210. When the first sealing cover 200 and the second sealing cover 210 are combined under pressure respectively, the rubber rings on the opposite surfaces of the first sealing cover 200 and the second sealing cover 210 will generate self-adaptive deformation, so as to realize the sealing of the air chamber 250 inside the combined sealing cover body. In addition, a sensor group is included in this detection device, and the sealing performance of the spliced pipe 400 is detected based on the cooperation of the sensor group, including a pressure sensor for feeding back the internal air pressure change of the air chamber 250, and an air flow sensor for verifying that there is indeed an air leakage in the spliced pipe 400.

[0046] like Figures 1 to 4 , Figure 9 , Figure 10 As shown, the sealing cover body also includes an air inlet 211 arranged at the bottom of the first sealing cover 200, and the air inlet 211 is connected to the compressor 300 pipeline; the first sealing cover 200 and the second sealing cover 210 are fixedly connected to the side walls corresponding to the airbag 230 with a connecting rod 240; a clearance groove 102 is opened on the detection frame 100; the first sealing cover 200 and the second sealing cover 210 are respectively fixedly connected to the receiving slide 260 via the connecting rod 240; the receiving slide 260 is slidably connected in the clearance groove 102; the interior of the clearance groove 102 is also fixedly connected to a sliding rod 101, and the sliding rod 101 is parallel to the displacement path of the sealing cover body, and the sealing cover body is slidably connected to the sliding rod 101 via the receiving slide 260.

[0047] In accordance with the above, when the splicing tube 400 is placed on the supporting unit, it is also necessary to control the relative sliding of the first sealing cover 200 and the second sealing cover 210 in the detection frame 100 and to merge. Therefore, it is also necessary to control the relative sliding of the first sealing cover 200 and the second sealing cover 210. In one embodiment of the present invention, an external motor is used to drive the first sealing cover 200 and the second sealing cover 210 to move respectively. In addition, other mechanical means can be used for driving, which will not be repeated here. However, it should be noted that the first sealing cover 200 and the second sealing cover 210 need to slide synchronously relative to each other. When the first sealing cover 200 and the second sealing cover 210 slide relative to each other, the sliding cooperation of the receiving slide plate 260 and the slide rod 101 is used to limit the first sealing cover 200 and the second sealing cover 210 to prevent the first sealing cover 200 and the second sealing cover 210 from deviating and failing to align and merge.

[0048] like Figures 1 to 6 As shown, a central groove 103 is also opened inside the detection frame 100, and the supporting unit is arranged in the central groove 103; the supporting unit includes a central support plate 500, and the bottom of the central support plate 500 is rotatably connected to the side wall of the central groove 103 via a rotating shaft.

[0049] When performing a sealing test on the spliced pipe 400, it is necessary to first place the spliced pipe 400 in the test frame 100, and it is necessary to ensure that when the first sealing cover 200 and the second sealing cover 210 slide relative to each other until they are combined, both ends of the spliced pipe 400 can penetrate through the air bags 230 on the first sealing cover 200 and the second sealing cover 210, and the splicing position of the spliced pipe 400 needs to be located in the air chamber 250. Based on this, in an embodiment of the present invention, it is necessary to use the middle support plate 500 to pre-support the spliced pipe 400. Specifically, when performing a sealing test on the spliced pipe 400, a staff member fixes the middle part of the spliced pipe 400 on the middle support plate 500. It should be noted that an arc-shaped notch is provided at the top of the middle support plate 500 to limit the spliced pipe 400. It is feasible to provide a synchronous extrusion mechanism on the top of the middle support plate 500. Using the synchronous extrusion mechanism, that is, at least three push rods driven by a micro motor, the spliced pipe 400 in the notch is adjusted to have a fixed axis, so that the axis of the spliced pipe 400 is coaxial with the circular notch at the position of the air bags 230 at both ends of the first sealing cover 200 and the second sealing cover 210. Based on this, after the spliced pipe 400 is pre-fixed, the first sealing cover 200 and the second sealing cover 210 can be directly driven to slide relative to each other and merge, without manual intervention and adjustment, improving the smoothness of the sealing test on the spliced pipe 400.

[0050] As Figures 1 to 6 shown, a gear 510 is fixedly connected to the rotating shaft at the bottom of the middle support plate 500, and the bottom of the gear 510 is meshed with a rack 520; the rack 520 penetrates through the test frame 100 and extends outside the test frame 100; when the first sealing cover 200 and the second sealing cover 210 slide relative to each other and merge, the rack 520 is pushed inward, and through the cooperation of the rack 520 and the gear 510, the middle support plate 500 is adjusted to contract in the middle groove 103.

[0051] Considering the need to improve the smoothness of the sealing test on the spliced ​​pipe 400, a central support plate 500 is set to pre-fix the spliced ​​pipe 400. When the first sealing cover 200 and the second sealing cover 210 slide relatively until they merge, the presence of the central support plate 500 will affect or even cause the first sealing cover 200 and the second sealing cover 210 to fail to complete the merger, thereby failing to form a complete air cavity 250. In one embodiment of the present invention, a gear 510 is set on the bottom shaft of the central support plate 500, and a rack 520 is used to The rack 520 meshes with the gear 510, and during the process of relative sliding between the first sealing cover 200 and the second sealing cover 210 and until they merge, the rack 520 drives the gear 510 to rotate, thereby causing the central support plate 500 to deflect and shrink in the central groove 103. It is worth noting that before the central support plate 500 deflects and shrinks in the central groove 103, theoretically, both ends of the splicing tube 400 should be connected to both the first sealing cover 200 and the second sealing cover 210, that is, the two ends of the splicing tube 400 have penetrated the two symmetrically arranged airbags 230.

[0052] like Figures 5 to 8 As shown, two central support plates 500 are provided and arranged symmetrically, and the gears 510 on the bottom rotating shafts of the two central support plates 500 are arranged alternately; a through groove 107 is opened on the side wall of the detection frame 100, and the through groove 107 is parallel to the make way groove 102, and the through groove 107 is located obliquely below the make way groove 102; the two symmetrically arranged through grooves 107 are arranged alternately correspondingly.

[0053] In order to make the splicing tube 400 relatively stable after placement, two central support plates 500 are symmetrically arranged, and in order to avoid jamming, the gears 510 on the bottom rotating shafts of the two central support plates 500 are staggered. Furthermore, in order to facilitate the control of the deflection and contraction of the central support plate 500 in the central groove 103 so as not to affect the merging of the first sealing cover 200 and the second sealing cover 210, it is also necessary to open a through groove 107 in the detection frame 100, and use the rack 520 to slide in the through groove 107, so that the rack 520 can drive the gear 510 to rotate, thereby driving the central support plate 500 to deflect, so as to avoid affecting the merging of the first sealing cover 200 and the second sealing cover 210.

[0054] like Figures 5 to 8As shown, a clamping block 530 is fixedly connected to the side wall of the middle support plate 500, and the clamping block 530 is of a triangular structure; an activity groove 105 is further formed in the detection frame 100, a connecting shaft 541 is slidably connected in the activity groove 105, and a first spring 542 is fixedly connected between one end of the connecting shaft 541 and the bottom surface of the activity groove 105; the other end of the connecting shaft 541 is fixedly connected with a resisting block 540; when the middle support plate 500 deflects and contracts in the middle groove 103, the resisting block 540 abuts against the clamping block 530 to limit the middle support plate 500.

[0055] When the gear 510 on the bottom rotating shaft of the middle support plate 500 is driven by the rack 520 to deflect, the middle support plate 500 will rotate around the rotating shaft and contract in the middle groove 103. It should be noted that after the middle support plate 500 deflects and contracts, it is also necessary to limit the middle support plate 500 to prevent the rack 520 from disengaging from the gear 510. The torsion spring on the rotating shaft of the middle support plate 500 drives the middle support plate 500 to reset. Therefore, a clamping block 530 is also provided on the side wall of the middle support plate 500. After the middle support plate 500 deflects, the clamping block 530 on its side wall can squeeze the resisting block 540, and the resisting block 540 together with the connecting shaft 541 contracts in the activity groove 105, and then the elastic potential energy of the first spring 542 is used to tightly abut against the clamping block 530 to limit the reset of the middle support plate 500, ensuring that after the first sealing cover 200 and the second sealing cover 210 are combined, they will not be affected by the middle support plate 500.

[0056] As Figures 5 to 8 shown, a communication groove 104 is further formed in the detection frame 100, and the communication groove 104 communicates with the middle groove 103; an L-shaped rod is fixedly connected to the side wall of the resisting block 540, and the L-shaped rod is movably connected in the middle groove 103 and the communication groove 104; one end of the L-shaped rod is fixedly connected with the resisting block 540, and the other end is fixedly connected with a tapered block 550.

[0057] When the abutting block 540 abuts against the clamping block 530 tightly to prevent the middle support plate 500 from lifting when the first sealing cover 200 and the second sealing cover 210 are combined, which may affect the combination of the first sealing cover 200 and the second sealing cover 210. After the sealing performance detection of the splicing pipe 400 is completed, it is necessary to control the reset of the middle support plate 500. At this time, it is necessary to contract the abutting block 540 together with the connecting shaft 541 in the movable groove 105 to separate the abutting block 540 from the clamping block 530. Then, the torsion spring on the bottom rotating shaft of the middle support plate 500 can drive the middle support plate 500 to reset. The gear 510 drives the rack 520 to extend outwards in the reverse direction, and the middle support plate 500 is reset. In this process, in order to further facilitate the reset of the middle support plate 500, in one embodiment, the tapered block 550 on the L-shaped rod 560 is used. When the middle support plate 500 is reset, the tapered block 550 is pushed outwards, and the L-shaped rod 560 is used to drive the abutting block 540 and the connecting shaft 541 to contract in the movable groove 105, and then the middle support plate 500 is reset.

[0058] As Figure 1 , Figures 4 to 8 shown, a sliding groove 106 communicating with the communication groove 104 is formed on the surface of the detection frame 100, and a spring rod 610 is fixedly connected in the sliding groove 106. A pushing block 600 is slidably connected to the spring rod 610, and the inclined surfaces on both sides of the pushing block 600 are matched with the tapered block 550.

[0059] Continuing from the above, in order to control the reset of the two middle support plates 500 simultaneously, a pushing block 600 sliding along the spring rod 610 is arranged on the surface of the detection frame 100. When it is necessary to control the reset of the middle support plate 500, the staff only needs to push the pushing block 600 inwards. The inclined surface on the side of the pushing block 600 is matched with the tapered block 550 to squeeze the tapered block 550 to displace outwards, and then the L-shaped rod 560 can be used to drive the abutting block 540 and the connecting shaft 541 to contract in the movable groove 105, so that the middle support plate 500 can be reset under the action of the torsion spring. It should be noted that, in addition to being pushed in by the staff, the pushing block 600 can also be driven by mechanical means, such as setting an electric telescopic rod and a sensor. When the first sealing cover 200 and the second sealing cover 210 are separated, after being sensed by the sensor, the electric telescopic rod is controlled to push the pushing block 600 to reset the middle support plate 500, realizing the support for the splicing pipe 400, and then the staff can take out the splicing pipe 400.

[0060] As Figures 1 to 5 shown, the communication groove 104 and the sliding groove 106 are cross-shaped, and the pushing block 600 and the spring rod 610 are located in the middle of the two L-shaped rods 560 and the tapered block 550.

[0061] As Figures 1 to 5As shown, a deflector plate 521 is also fixedly connected to the rack 520, and the deflector plate 521 is located outside the detection frame 100; when the first sealing cover 200 and the second sealing cover 210 slide relatively and merge, the receiving slide plate 260 presses the deflector plate 521 and drives the rack 520 to be pushed inward.

[0062] Working principle: In the prior art, the provided sealing module and the supporting device for fixing the metal pipe can only be applicable to a type with a fixed size and lack adaptability. Especially for the spliced pipe 400 after splicing due to insufficient length, its own length is relatively long, and it is more inapplicable to be detected by the device disclosed in the prior art. Therefore, the above prior art obviously has limitations. In an embodiment of the present invention, the first sealing cover 200 and the second sealing cover 210 that slide relatively and can be merged inside the detection frame 100 are adopted. When detecting the sealing performance of the spliced pipe 400 after splicing, the spliced pipe 400 can be placed on the supporting unit, and the supporting unit is used to temporarily support the spliced pipe 400. Then, the first sealing cover 200 and the second sealing cover 210 arranged symmetrically on the left and right are controlled to slide relatively inside the detection frame 100 and finally merge together. The formed sealing cover body after merging can include the splicing part of the spliced pipe 400 inside the sealing cover body, and both ends of the spliced pipe 400 can respectively pass through the air bags 230 at the ends of the first sealing cover 200 and the second sealing cover 210. After the first sealing cover 200 and the second sealing cover 210 are merged, the air bags 230 can be controlled to be inflated to generate an adaptive deformation by radial extrusion, so that the inner wall of the air bag 230 forms a dynamic sealing contact with the outer surface of the spliced pipe 400; at the same time, a stable air pressure gradient is maintained inside the air cavity 250 through the compressor 300, so that the contact pressure between the air bag 230 and the pipe wall of the spliced pipe 400 is evenly distributed. Based on this double-sealing structure, a continuous closed space is constructed around the spliced pipe 400, effectively isolating the interference of the external environment and providing a constant-pressure and dust-free sealing environment for the internal detection operation. Then, by means of the air flow sensor, it is detected whether there is air flow at both ends of the spliced pipe 400 outside the sealing cover body, and thus it can be judged whether there is a gap in the spliced pipe 400, that is, the sealing performance of the spliced pipe 400 is detected; thus, for the spliced pipe 400 formed by splicing two separated pipes, its sealing performance can be detected regardless of its length, without being limited by the length of the spliced pipe 400, and it has strong adaptability. In addition, both ends of the sealing cover body are open, that is, the position of the air bag 230 can also be adaptively adjusted according to the diameter of the spliced pipe 400. Therefore, it can be applicable to the spliced pipe 400 with a certain diameter range and unlimited length for sealing performance detection;

[0063] It should be noted that rubber rings are provided on the opposite faces of the first sealing cover 200 and the second sealing cover 210. When the first sealing cover 200 and the second sealing cover 210 are combined under pressure respectively, the rubber rings on the opposite faces of the first sealing cover 200 and the second sealing cover 210 will produce self-adaptive deformation, so as to realize the sealing of the air cavity 250 in the sealing cover body after combination; in addition, the detection device includes a sensor group, and the airtightness detection of the splicing pipe 400 is realized based on the cooperation of the sensor group, including a barometric pressure sensor for feeding back the change of the internal air pressure of the air cavity 250; an air flow sensor for verifying that there is indeed an air leakage in the splicing pipe 400.

[0064] When placing the splicing pipe 400 on the supporting unit, it is also necessary to control the first sealing cover 200 and the second sealing cover 210 to slide relatively in the detection frame 100 and produce combination. Therefore, it is also necessary to control the first sealing cover 200 and the second sealing cover 210 to produce relative sliding. In an embodiment of the present invention, an external motor is used to drive the first sealing cover 200 and the second sealing cover 210 to move respectively. In addition, other mechanical means can also be used for driving, which will not be elaborated here. However, it should be noted that the first sealing cover 200 and the second sealing cover 210 need to slide relatively synchronously. When the first sealing cover 200 and the second sealing cover 210 slide relatively, the sliding fit between the receiving slide plate 260 and the slide bar 101 is used to limit the first sealing cover 200 and the second sealing cover 210, preventing the problem that the first sealing cover 200 and the second sealing cover 210 deviate and cannot be aligned and combined.

[0065] When performing a sealing test on the spliced pipe 400, it is necessary to first place the spliced pipe 400 in the test frame 100, and it is necessary to ensure that when the first sealing cover 200 and the second sealing cover 210 slide relative to each other until they are combined, both ends of the spliced pipe 400 can penetrate through the air bags 230 on the first sealing cover 200 and the second sealing cover 210, and the splicing position of the spliced pipe 400 needs to be within the air cavity 250. Based on this, in an embodiment of the present invention, it is necessary to use the middle support plate 500 to pre-support the spliced pipe 400. Specifically, when performing a sealing test on the spliced pipe 400, the staff fixes the middle part of the spliced pipe 400 on the middle support plate 500. It is worth noting that an arc-shaped notch is opened at the top of the middle support plate 500, which can limit the position of the spliced pipe 400. Feasibly, a synchronous extrusion mechanism is arranged on the top of the middle support plate 500. Using the synchronous extrusion mechanism, that is, at least three push rods driven by a micro-motor, the spliced pipe 400 in the notch is adjusted to have a fixed axis, so that the axis of the spliced pipe 400 is coaxial with the circular notches at the positions of the air bags 230 at both ends of the first sealing cover 200 and the second sealing cover 210. Based on this, after the spliced pipe 400 is pre-fixed, the first sealing cover 200 and the second sealing cover 210 can be directly driven to slide relative to each other and be combined, without manual intervention and adjustment, improving the smoothness of the sealing test on the spliced pipe 400; Considering that it is necessary to improve the smoothness of the sealing test on the spliced pipe 400, the middle support plate 500 is set to pre-fix the spliced pipe 400. However, when the first sealing cover 200 and the second sealing cover 210 slide relative to each other until they are combined, the presence of the middle support plate 500 will affect or even prevent the first sealing cover 200 and the second sealing cover 210 from being combined, and thus a complete air cavity 250 cannot be formed. In an embodiment of the present invention, a gear 510 is arranged on the bottom rotating shaft of the middle support plate 500, and a rack 520 is engaged with the gear 510. During the process of the first sealing cover 200 and the second sealing cover 210 sliding relative to each other and until they are combined, the rack 520 will drive the gear 510 to rotate, so that the middle support plate 500 deflects and contracts in the middle groove 103. It is worth noting that before the middle support plate 500 deflects and contracts in the middle groove 103, theoretically, both ends of the spliced pipe 400 should be connected to the first sealing cover 200 and the second sealing cover 210, that is, both ends of the spliced pipe 400 have penetrated through the two symmetrically arranged air bags 230;In order to make the splicing pipe 400 relatively stable after being placed, two middle support plates 500 are symmetrically arranged. And in order to avoid jamming, the gears 510 on the bottom rotating shafts of the two middle support plates 500 are staggered. Further, in order to conveniently control the deflection and contraction of the middle support plate 500 in the middle groove 103, so as not to affect the combination of the first sealing cover 200 and the second sealing cover 210, it is also necessary to open a through groove 107 in the detection frame 100, and use the rack 520 to slide in the through groove 107, so that the rack 520 can drive the gear 510 to rotate, thereby driving the middle support plate 500 to deflect and avoiding affecting the combination of the first sealing cover 200 and the second sealing cover 210.;

[0066] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. An intelligent sensor for pipeline tightness detection, characterized in that: include: A detection frame (100) for carrying a spliced ​​pipe (400) to be detected; A sealing cover body is slidably connected in the detection frame (100), and the splicing pipe (400) passes through both ends of the sealing cover body; A compressor (300) is arranged in the detection frame (100) and is connected to the sealing cover through a pipeline; A supporting unit, used to support the axis of the spliced ​​pipe (400) to coincide with the axis of the sealing cover, the supporting unit being arranged in the detection frame (100); The sealing cover body comprises a first sealing cover (200) and a second sealing cover (210), and the first sealing cover (200) and the second sealing cover (210) are respectively slidably connected to two ends of a detection frame (100); when the first sealing cover (200) and the second sealing cover (210) are relatively slidably merged in the detection frame (100), an enclosed air cavity (250) is formed internally, and air bags (230) are symmetrically arranged at both ends of the air cavity (250).

2. The intelligent sensor for pipeline sealing detection according to claim 1, characterized in that: The sealing cover body further comprises an air inlet (211) arranged at the bottom of the first sealing cover (200), and the air inlet (211) is connected to a compressor (300) pipeline; a connecting rod (240) is fixedly connected to the side walls of the first sealing cover (200) and the second sealing cover (210) corresponding to the airbag (230); The detection frame (100) is provided with a clearance groove (102); the first sealing cover (200) and the second sealing cover (210) are respectively fixedly connected with a receiving slide plate (260) via a connecting rod (240); the receiving slide plate (260) is slidably connected in the clearance groove (102); A sliding rod (101) is also fixedly connected inside the clearance groove (102), and the sliding rod (101) is parallel to the displacement path of the sealing cover body, and the sealing cover body is slidably connected to the sliding rod (101) via a receiving slide plate (260).

3. The intelligent sensor for pipeline sealing detection according to claim 2, characterized in that: The detection frame (100) is also provided with a central groove (103) inside, and the supporting unit is arranged in the central groove (103); The supporting unit comprises a central support plate (500), and the bottom of the central support plate (500) is rotatably connected to the side wall of the central groove (103) via a rotating shaft.

4. The intelligent sensor for pipeline sealing detection according to claim 3, characterized in that: A gear (510) is fixedly connected to the rotating shaft at the bottom of the central support plate (500), and a rack (520) is meshedly connected to the bottom of the gear (510); the rack (520) penetrates the detection frame (100) and extends outside the detection frame (100); when the first sealing cover (200) and the second sealing cover (210) slide relative to each other and merge, the rack (520) is pushed inward, and the rack (520) cooperates with the gear (510) to adjust the central support plate (500) to shrink in the central groove (103).

5. The intelligent sensor for pipeline sealing detection according to claim 4, characterized in that: Two central support plates (500) are provided and arranged symmetrically, and the gears (510) on the bottom rotating shafts of the two central support plates (500) are arranged alternately; a through groove (107) is opened on the side wall of the detection frame (100), and the through groove (107) is parallel to the clearance groove (102), and the through groove (107) is located obliquely below the clearance groove (102); the two symmetrically arranged through grooves (107) are arranged alternately in correspondence.

6. The intelligent sensor for pipeline sealing detection according to claim 5, characterized in that: A clamping block (530) is fixedly connected to the side wall of the central support plate (500), and the clamping block (530) is a triangular structure; The detection frame (100) is also provided with a movable groove (105), and a connecting shaft (541) is slidably connected in the movable groove (105), and a first spring (542) is fixedly connected between one end of the connecting shaft (541) and the bottom surface of the movable groove (105); a stop block (540) is fixedly connected to the other end of the connecting shaft (541); when the central support plate (500) deflects and contracts in the central groove (103), the stop block (540) abuts against the clamping block (530) to limit the central support plate (500).

7. The intelligent sensor for pipeline sealing detection according to claim 6, characterized in that: A communication groove (104) is also provided in the detection frame (100), and the communication groove (104) is connected to the central groove (103); An L-shaped rod is fixedly connected to the side wall of the stop block (540), and the L-shaped rod is movably connected in the central groove (103) and the connecting groove (104); one end of the L-shaped rod is fixedly connected to the stop block (540), and the other end is fixedly connected to the cone block (550).

8. The intelligent sensor for pipeline sealing detection according to claim 7, characterized in that: A slide groove (106) connected to the connecting groove (104) is provided on the surface of the detection frame (100), and a spring rod (610) is fixedly connected in the slide groove (106). A push block (600) is slidably connected to the spring rod (610), and the inclined surfaces on both sides of the push block (600) cooperate with the cone block (550).

9. The intelligent sensor for pipeline sealing detection according to claim 8, characterized in that: The connecting groove (104) and the sliding groove (106) are cross-intersected, and the push block (600) and the spring rod (610) are located in the middle of the two L-shaped rods (560) and the cone block (550).

10. The intelligent sensor for pipeline sealing detection according to claim 9, characterized in that: A shift plate (521) is also fixedly connected to the rack (520), and the shift plate (521) is located outside the detection frame (100); when the first sealing cover (200) and the second sealing cover (210) slide relatively and merge, the receiving slide plate (260) presses the shift plate (521) and drives the rack (520) to be pushed inward.

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