Thin-wall steel pipe air pressure test device

Abstract

The utility model relates to an air pressure testing device for a thin-wall steel pipe, which belongs to the technical field of steel pipe experimental equipment and comprises two pipe storage racks arranged in parallel, and a pair of clamping and sealing driving devices for clamping and sealing two ends of a steel pipe and driving the steel pipe to rotate are arranged on the outer sides of the middle parts of the pipe storage racks. An air supply system for introducing air into the steel pipe is arranged on the clamping and sealing driving device, and a foaming liquid blowing and spraying device is arranged at the upper left part of the steel pipe. The steel pipe can be conveyed along the roller of the pipe storage rack, then the end part of the steel pipe is automatically clamped and sealed by the clamping and sealing driving device, the steel pipe is driven to rotate and inflate, and then the foaming liquid is sprayed to the steel pipe by the foaming liquid blowing spraying device, so that the manpower is saved, the labor intensity is reduced, and the detection experiment efficiency is improved.

Description

Technical Field

[0001] The utility model relates to a thin-wall steel pipe air pressure testing device, belonging to the technical field of steel pipe experimental equipment. Background Art

[0002] The main body of the interlocking reinforcing rib spiral welded steel pipe for coal mines is made of thin steel plates with a thickness of more than 200mm, which are screwed and welded together by pressing the edges of the plates. The reinforcing rib pipe is a relatively niche product, suitable for coal mines, chemical industry and civil exhaust ducts. This type of steel pipe is light in weight, high in strength, has a flat inner diameter without debris, and the steel is heat-resistant, making it more suitable for gas extraction in coal mines. Although it has such advantages, this steel pipe also has certain disadvantages. Due to the long weld, the production and inspection efficiency is low. Especially in the weld inspection process, there is no mature inspection equipment. Almost all manufacturers use simple equipment or manually connect flange blind plate pressure testing methods to measure pressure. The pressure testing process requires 5-6 people, and the labor cost is high; the labor intensity is high and the efficiency is low. Utility Model Content

[0003] The utility model provides a thin-wall steel pipe air pressure testing device, which solves the problems of high labor cost, high labor intensity and low efficiency of the current testing device.

[0004] The utility model relates to a thin-wall steel pipe air pressure test device, comprising two pipe storage racks arranged in parallel, a pair of compression and sealing driving devices which clamp the two ends of a sealed steel pipe and can drive the steel pipe to rotate are arranged on the outer side of the middle part of the pipe storage rack, an air supply system for ventilating the steel pipe is arranged on the compression and sealing driving device, and a foaming liquid blowing spray device is arranged on the upper left side of the steel pipe.

[0005] As a preferred embodiment, the foaming liquid blowing spray device includes a spray pipe parallel to the steel pipe, and a plurality of nozzles facing the steel pipe are evenly arranged on the spray pipe, which can evenly spray the foaming liquid toward the outer wall of the steel pipe, making it convenient to check for leakage later.

[0006] As a preferred embodiment, an inspection platform is fixed on the pipe storage rack to facilitate observation of whether the steel pipe is leaking.

[0007] As a preferred embodiment, the compression and sealing driving device comprises a base frame, a slide plate is provided on the base frame, the slide plate is connected to a feed driving mechanism driving it to slide along the axial direction of the steel pipe, a rotating support seat is fixed on the top of one end of the slide plate close to the pipe storage rack, a rotating shaft is rotatably installed on the rotating support seat, a rotating disk frame is fixed on one end of the rotating shaft close to the pipe storage rack, a sealing rotating disk is fixedly connected to the rotating disk frame, a ring-shaped sealing strip is fixed on one side of the sealing rotating disk close to the pipe storage rack, a compression mechanism for compressing the flange of the steel pipe is provided on the sealing rotating disk, and the rotating disk frame is connected to a rotating driving mechanism. The flange of the steel pipe can be automatically compressed and sealed, and then the steel pipe is driven to rotate through the rotating driving mechanism.

[0008] As a preferred embodiment, the clamping mechanism includes a plurality of horizontal angle cylinders arranged on the outside of the sealing strip, and the horizontal angle cylinders are fixedly connected with pressure claws, so that the pressing of the steel pipe is more automated.

[0009] As a preferred embodiment, the feed drive mechanism includes a slider fixed to the bottom of the skateboard, the slider is connected to a slide rail, the bottom of the slide rail is fixed to the base frame, a nut is fixed to the bottom of the skateboard, the nut is connected to a screw rod, the screw rod is fixedly connected to a drive motor, and the drive motor is fixed to the base frame.

[0010] As a preferred embodiment, the rotary drive mechanism includes a large gear fixed on the turntable frame, the large gear is meshed with a small gear, the small gear is fixedly connected to a rotary motor, and the rotary motor is fixed on the slide.

[0011] As a preferred embodiment, the interior of the rotating shaft is a hollow structure, and the air supply system includes a support ring fixed to the inner end of the rotating shaft, the support ring is fixed with a sealing pressure plate by bolts, the sealing pressure plate is provided with an air port, the air port is connected to a ventilation hose, the horizontal angle cylinder is connected to an oil inlet hose and an oil return hose, a rotating joint is fixed to the outer end of the rotating shaft, the ventilation hose, the oil inlet hose and the oil return hose are connected to the rotating joint, and the rotating joint is provided with an oil inlet joint, an oil return joint and an air path joint to facilitate rotary air and oil supply.

[0012] As a preferred embodiment, a sealing ring is provided between the support ring and the sealing pressure plate to prevent air leakage.

[0013] As a preferred embodiment, a lifting and pipe-pushing mechanism is provided on both sides of the middle of the bottom of the steel pipe. The lifting and pipe-pushing mechanism includes a base arranged at the front and rear ends, a movable plate is hinged on the top of the base, and the outer end of the movable plate is hinged with a lifting cylinder. The upper ends of the movable plates at the front and rear ends are rotatably connected to support rollers, which can facilitate the feeding and discharging of steel pipes.

[0014] The utility model has the following beneficial effects:

[0015] The steel pipe can be transported along the roller of the pipe storage stand, and then the end of the sealed steel pipe can be automatically clamped by the compression sealing drive device, and driven to rotate and inflate, and then the foaming liquid is blown up by the spray device to spray the foaming liquid onto the steel pipe, which saves manpower, reduces labor intensity, and improves the efficiency of the detection experiment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0017] Figure 2 for Figure 1 Schematic diagram of some structures;

[0018] Figure 3 Schematic diagram of the three-dimensional structure of the compression seal drive device Figure 1 ;

[0019] Figure 4 Schematic diagram of the three-dimensional structure of the compression seal drive device Figure 2 ;

[0020] Figure 5 is a structural schematic diagram of the rotating shaft;

[0021] In the figure: 1, pipe storage rack, 2, lifting and removing pipe mechanism, 201, lifting cylinder, 202, base, 203, support roller, 204, movable plate, 3, steel pipe, 4, pressing and sealing drive device, 401, sealing turntable, 402, turntable frame, 403, large gear, 404, rotating shaft, 405, rotating motor, 406, slide plate, 407, bottom frame, 408, slide rail, 409, nut, 410, driving motor, 411, rotating Adapter, 412, screw rod, 413, horizontal angle cylinder, 414, sealing strip, 415, sealing pressure plate, 416, pressure claw, 417, oil return joint, 418, sealing ring, 419, air port, 420, ventilation hose, 421, oil return hose, 422, oil inlet hose, 423, air circuit joint, 424, oil inlet joint, 5, foaming liquid blowing spray device, 501, spray pipe, 502, nozzle, 6, inspection platform. DETAILED DESCRIPTION

[0022] The utility model is further described below in conjunction with embodiments.

[0023] Embodiment 1, as Figures 1 to 5 As shown, the utility model is a thin-walled steel pipe air pressure test device, comprising two parallel pipe storage racks 1, a pair of compression and sealing driving devices 4 are provided on the outer side of the middle part of the pipe storage rack 1 for clamping the two ends of the sealed steel pipe 3 and driving the steel pipe 3 to rotate, an air supply system for ventilating the steel pipe 3 is provided on the compression and sealing driving device 4, and a foaming liquid blowing spray device 5 is provided on the upper left side of the steel pipe 3.

[0024] During operation: the steel pipe 3 at the feeding end of the pipe storage rack 1 rolls between the two compression and sealing drive devices 4, and then the compression and sealing drive device 4 compresses and seals the steel pipe 3, and then the air supply system inflates the steel pipe 3, and at this time the foaming liquid blows up the spray device 5 to spray the foaming liquid onto the outer wall of the steel pipe 3, and then the air tightness of the steel pipe 3 can be detected by observing whether there are bubbles on the surface of the steel pipe 3. After the detection, the air supply system is exhausted, and then the compression and sealing drive device 4 releases the steel pipe 3, and the steel pipe 3 continues to roll to the discharge end of the pipe storage rack 1.

[0025] Embodiment 2, based on embodiment 1, the foaming liquid blowing spray device 5 includes a spray pipe 501 parallel to the steel pipe 3, and a plurality of nozzles 502 facing the steel pipe 3 are evenly arranged on the spray pipe 501.

[0026] An inspection platform 6 is fixed on the pipe storage rack 1 .

[0027] The compression and sealing driving device 4 includes a base frame 407, on which a slide plate 406 is provided, and the slide plate 406 is connected to a feed driving mechanism driving it to slide along the axial direction of the steel pipe 3, and a rotating support seat is fixed on the top of the slide plate 406 near the pipe storage rack 1, and a rotating shaft 404 is rotatably installed on the rotating support seat, and a rotating disk frame 402 is fixed on the end of the rotating shaft 404 near the pipe storage rack 1, and the rotating disk frame 402 is fixedly connected to a sealing rotating disk 401, and a ring-shaped sealing strip 414 is fixed on the side of the sealing rotating disk 401 near the pipe storage rack 1, and a compression mechanism for compressing the flange of the steel pipe 3 is provided on the sealing rotating disk 401, and the rotating disk frame 402 is connected to a rotating driving mechanism. Test pressure: 0.2MPa; oil pressure system: 32MPa.

[0028] The pressing mechanism includes a plurality of horizontal angle oil cylinders 413 arranged outside the sealing strip 414 , and the horizontal angle oil cylinders 413 are fixedly connected with pressing claws 416 .

[0029] The feed drive mechanism includes a slider fixed at the bottom of the slide 406, the slider is connected to a slide rail 408, the bottom of the slide rail 408 is fixed to the base frame 407, a nut 409 is fixed to the bottom of the slide 406, the nut 409 is connected to a screw rod 412, the screw rod 412 is fixedly connected to a drive motor 410, and the drive motor 410 is fixed to the base frame 407.

[0030] The rotary drive mechanism includes a large gear 403 fixed on the turntable frame 402 , the large gear 403 is meshed with a small gear, the small gear is fixedly connected to a rotary motor 405 , and the rotary motor 405 is fixed on a slide plate 406 .

[0031] The interior of the rotating shaft 404 is a hollow structure, and the air supply system includes a support ring fixed to the inner end of the rotating shaft 404, and the support ring is fixed with a sealing pressure plate 415 by bolts. The sealing pressure plate 415 is provided with an air port 419, and the air port 419 is connected to a ventilation hose 420. The horizontal angle cylinder 413 is connected to an oil inlet hose 422 and an oil return hose 421. A rotary joint 411 is fixed to the outer end of the rotating shaft 404, and the ventilation hose 420, the oil inlet hose 422 and the oil return hose 421 are connected to the rotary joint 411. The rotary joint 411 is provided with an oil inlet joint 424, an oil return joint 417 and an air path joint 423.

[0032] A sealing ring 418 is provided between the support ring and the sealing pressure plate 415 .

[0033] The bottom middle of the steel pipe 3 is provided with a lifting and shifting mechanism 2 on both the left and right sides. The lifting and shifting mechanism 2 includes a base 202 arranged at the front and rear ends. A movable plate 204 is hinged on the top of the base 202. A lifting cylinder 201 is hinged on the outer end of the movable plate 204. The upper ends of the movable plates 204 at the front and rear ends are rotatably connected to support rollers 203. When the steel pipe 3 rolls over from the feeding end of the pipe storage rack 1, the lifting cylinder 201 away from the feeding end extends, and the lifting cylinder 201 close to the feeding end contracts, so that the support roller 203 away from the feeding end will limit the steel pipe 3, and then the lifting cylinder 201 close to the feeding end extends to limit and support the steel pipe 3, and then the driving motor 410 rotates forward, driving the sealing turntable 401 on the slide 406 close to the end flange of the steel pipe 3, and then the sealing strip 414 is sealed at the flange, and then the horizontal angle oil cylinder 413 rotates, and the pressing claw 416 presses the flange, and then the rotating motor 405 is started, through the small gear and the large gear 40 3 drives the rotating shaft 404 to rotate, thereby driving the steel pipe 3 to rotate. At this time, the air supply system supplies air to the steel pipe 3, and the valve on the spray pipe 501 is opened, and the nozzle 502 evenly sprays the foaming liquid on the outer wall of the steel pipe 3. Then the inspector can go on the inspection platform 6 to check whether there is any air leak. After the inspection is qualified, the air supply system is exhausted, the valve on the spray pipe 501 is closed, the rotating motor 405 is turned off, and the driving motor 410 is reversed, driving the sealing turntable 401 on the slide plate 406 away from the end flange of the steel pipe 3, and then the lifting cylinder 201 near the discharge end is contracted, and the steel pipe 3 continues to roll along the pipe storage stand 1 toward the discharge end.

[0034] Excluding the repair welding personnel, 2 people are needed for the operation, 1 person for operation and 1 person for inspection. This can reduce 3 people compared with the original. It is expected that after the product is put into use, the inspection efficiency will be increased by 3 times. Considering the production limit of the steel pipe coiling machine, the efficiency of all products will be increased by 2 times.

[0035] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0036] In the description of the present invention, the terms "inside", "outside", "longitudinal", "lateral", "upper", "lower", "top", "bottom" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention.

Claims

1. A thin-walled steel pipe air pressure test device, characterized in that: The invention comprises two parallel pipe storage racks (1), wherein a pair of compression sealing driving devices (4) are arranged on the outer side of the middle part of the pipe storage rack (1) for clamping the two ends of a sealing steel pipe (3) and driving the steel pipe (3) to rotate, and an air supply system for ventilating the steel pipe (3) is arranged on the compression sealing driving device (4), and a foaming liquid blowing spray device (5) is arranged on the upper left side of the steel pipe (3).

2. The thin-walled steel pipe air pressure test device according to claim 1, characterized in that: The foaming liquid blowing spray device (5) comprises a spray pipe (501) parallel to the steel pipe (3), and a plurality of spray heads (502) facing the steel pipe (3) are evenly arranged on the spray pipe (501).

3. The thin-walled steel pipe air pressure test device according to claim 1, characterized in that: An inspection platform (6) is fixed on the pipe storage rack (1).

4. The thin-walled steel pipe air pressure test device according to claim 1, characterized in that: The compression and sealing driving device (4) comprises a base frame (407), on which a slide plate (406) is provided, and the slide plate (406) is connected to a feeding driving mechanism for driving the slide plate to slide along the axial direction of the steel pipe (3); a rotating support seat is fixed to the top of one end of the slide plate (406) close to the pipe storage rack (1), and a rotating shaft (404) is rotatably mounted on the rotating support seat; a rotating disk frame (402) is fixed to one end of the rotating shaft (404) close to the pipe storage rack (1); the rotating disk frame (402) is fixedly connected to a sealing rotating disk (401); a ring-shaped sealing strip (414) is fixed to one side of the sealing rotating disk (401) close to the pipe storage rack (1); a compression mechanism for compressing the flange of the steel pipe (3) is provided on the sealing rotating disk (401), and the rotating disk frame (402) is connected to a rotating driving mechanism.

5. The thin-walled steel pipe air pressure testing device according to claim 4, characterized in that: The pressing mechanism comprises a plurality of horizontal angle oil cylinders (413) arranged outside the sealing rubber strip (414), and the horizontal angle oil cylinders (413) are fixedly connected with pressing claws (416).

6. The thin-walled steel pipe air pressure test device according to claim 4, characterized in that: The feed drive mechanism comprises a slider fixed to the bottom of the slide plate (406), the slider is connected to a slide rail (408), the bottom of the slide rail (408) is fixed to the bottom of the base frame (407), a nut (409) is fixed to the bottom of the slide plate (406), the nut (409) is connected to a lead screw (412), the lead screw (412) is fixedly connected to a drive motor (410), and the drive motor (410) is fixed to the base frame (407).

7. The thin-walled steel pipe air pressure test device according to claim 4, characterized in that: The rotary drive mechanism comprises a large gear (403) fixed on the turntable frame (402), the large gear (403) is meshed with a small gear, the small gear is fixedly connected to a rotary motor (405), and the rotary motor (405) is fixed on a slide plate (406).

8. The thin-walled steel pipe air pressure testing device according to claim 5, characterized in that: The interior of the rotating shaft (404) is a hollow structure. The air supply system comprises a support ring fixed to the inner end of the rotating shaft (404). The support ring is fixed with a sealing pressure plate (415) by bolts. The sealing pressure plate (415) is provided with an air port (419). The air port (419) is connected with a ventilation hose (420). The horizontal angle oil cylinder (413) is connected with an oil inlet hose (422) and an oil return hose (421). A rotary joint (411) is fixed to the outer end of the rotating shaft (404). The ventilation hose (420), the oil inlet hose (422) and the oil return hose (421) are connected to the rotary joint (411). The rotary joint (411) is provided with an oil inlet joint (424), an oil return joint (417) and an air path joint (423).

9. The thin-walled steel pipe air pressure test device according to claim 8, characterized in that: A sealing ring (418) is provided between the support ring and the sealing pressure plate (415).

10. The thin-walled steel pipe air pressure testing device according to claim 1, characterized in that: A lifting and displacing mechanism (2) is provided on both left and right sides of the middle of the bottom of the steel pipe (3). The lifting and displacing mechanism (2) comprises a base (202) arranged at the front and rear ends, a movable plate (204) is hingedly connected to the top of the base (202), a lifting cylinder (201) is hingedly connected to the outer end of the movable plate (204), and the upper ends of the movable plates (204) at the front and rear ends are rotatably connected to support rollers (203).

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