Medical gas pipeline welding inner plugging device

Abstract

The application relates to a medical gas pipeline welding inner sealing device, belonging to the pipeline welding field, which comprises a first pipe body, a second pipe body and a third pipe body arranged at the two ends of the first pipe body respectively, the first pipe body, the second pipe body and the third pipe body are coaxial, pressure expansion pieces are arranged between the first pipe body and the second pipe body and between the first pipe body and the third pipe body, a driving assembly for driving the second pipe body and the third pipe body to move towards each other so that the two pressure expansion pieces are extruded and expanded is arranged on the first pipe body, when the application is used, the first pipe body, the second pipe body and the third pipe body are slid into a pipeline to be welded, the two pressure expansion pieces are located at the two sides of a weld seam, under the action of the driving assembly, the two pressure expansion pieces are expanded under pressure and abut against the inner wall of the pipeline, so that the pipeline is sealed, the sliding in and sliding out are relatively smooth, the operation is convenient, the spacing between the two pressure expansion pieces is small, the amount of inert gas is small, the filling time is short, the construction cost is low, and the efficiency is high.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of pipe welding, in particular to a medical gas pipeline welding internal plugging device. BACKGROUND

[0002] The development of the medical industry is closely related to people's health problems, and the medical gas pipeline system is one of the important components of medical facility hardware. High-quality pipelines that meet health requirements are an effective guarantee for hospital rescue, treatment and detection.

[0003] When welding a pipeline, the oxidation of the weld is one of the key factors affecting the quality of the pipeline. In order to prevent the oxidation of the weld, inert gas is used to isolate and protect the outside and inside of the weld during the welding process. For the outside of the weld, since the inert gas nozzle is mounted on the welding gun, the nozzle can directly spray inert gas to the outside of the weld. For the inside of the weld, the ends of the pipeline need to be plugged, and inert gas is injected into the pipeline.

[0004] Regarding the method of plugging the pipeline, there are generally two methods: one is to use adhesive tape or water-soluble paper to plug the pipe openings at both ends of the pipeline, and the inflatable tube end is inserted through the adhesive tape or water-soluble paper, and inert gas is injected into the pipeline. Another method is to insert two rubber plugging plates into the pipeline, and the two rubber plugging plates are respectively located on both sides of the weld, and the inflatable tube end is inserted through the rubber plugging plate, and inert gas is injected into the pipeline.

[0005] In view of the above-mentioned related technology, the following defects exist: using adhesive tape or water-soluble paper to plug the pipe opening, if the pipeline is long, a large amount of inert gas needs to be injected to replace the air in the pipeline, which is low in efficiency and high in cost; using rubber plugging plates to plug the pipeline, when inserting and taking out, the rubber plugging plates will produce a certain friction with the pipe wall, which is complicated to operate, time-consuming and laborious. SUMMARY

[0006] In order to improve the problems of using adhesive tape or water-soluble paper to plug the pipeline, which requires a large amount of inert gas and a long injection time, and using rubber plugging plates to plug the pipeline, which is laborious to insert and take out, the present application provides a medical gas pipeline welding internal plugging device.

[0007] The medical gas pipeline welding internal plugging device provided by the present application adopts the following technical solution:

[0008] A medical gas pipeline welding internal plugging device, comprising: a first pipe body and a second pipe body and a third pipe body respectively arranged at both ends of the first pipe body, the first pipe body, the second pipe body and the third pipe body are coaxial, a pressure expansion piece is arranged between the first pipe body and the second pipe body and between the first pipe body and the third pipe body, and a driving assembly is arranged on the first pipe body for driving the second pipe body and the third pipe body to move towards each other so that the two pressure expansion pieces are squeezed and expanded.

[0009] By adopting the technical scheme, the first pipe body, the second pipe body and the third pipe body are slid into the pipeline to be welded, the two pressure expansion members are located on the two sides of the weld, under the action of the driving assembly, the two pressure expansion members are pressed and expanded and abut on the inner wall of the pipeline, so that the pipeline is blocked, the sliding in and out is relatively smooth, the operation is convenient, the spacing between the two pressure expansion members is small, the amount of inert gas is small, the filling time is short, the construction cost is low and the efficiency is high.

[0010] Optionally, the driving assembly comprises an inner pipe penetrating into the second pipe body and the first pipe body, a limiting block is arranged on the inner pipe, the limiting block abuts on the end of the second pipe body, and the third pipe body is threadedly connected with the end of the inner pipe away from the limiting block.

[0011] By adopting the technical scheme, under the limiting action of the limiting block, the second pipe body remains stationary, when the third pipe body is rotated on the inner pipe, the third pipe body moves towards the limiting block, the two pressure expansion members are pressed and expanded, the structure is simple, the operation is convenient and the fixation is stable.

[0012] Optionally, the pressure expansion member is a rubber ring.

[0013] By adopting the technical scheme, the pressure expansion member is in a pressed state for a long time, is easy to rub against the inner wall of the pipeline and is easy to be damaged, and is a consumable, while the rubber ring can be directly purchased, is convenient to obtain and is low in price and cost, thereby reducing the construction cost.

[0014] Optionally, at least two rubber rings connected end to end are arranged between the first pipe body and the second pipe body and between the first pipe body and the third pipe body, and a steel ring is arranged between adjacent rubber rings.

[0015] By adopting the technical scheme, if the rubber ring is damaged and is not found in time, the blocking effect will be poor and the air tightness will be reduced, and even if part of the rubber rings are damaged, the blocking effect will not be affected, thereby improving the construction quality.

[0016] Optionally, the end of the third pipe body is provided with an air nozzle, the inner pipe is provided with a first air cavity, the inner pipe is provided with a second air cavity, the inner pipe is provided with a first air hole, the first pipe body is provided with a third air cavity, the first pipe body is provided with a second air hole, and the air nozzle, the first air cavity, the second air cavity, the first air hole, the third air cavity and the second air hole are sequentially communicated.

[0017] By adopting the above technical scheme, the air nozzle is connected with the air source, the inert gas passes through the air nozzle, the first air cavity, the second air cavity, the first air hole, the third air cavity and the second air hole in sequence and then enters the pipeline, and finally is discharged from the weld, the air nozzle is located outside the pipeline, and during construction, the inflatable pipe can be directly connected with the air nozzle without being inserted into the pipeline, so that the operation is convenient, and the air nozzle and the inflatable pipe can be monitored throughout the process, so that looseness can be found in time, and the construction quality is improved.

[0018] Optionally, the first pipe body is provided with a baffle at the second air hole, and a predetermined gap is left between the baffle and the second air hole.

[0019] By adopting the above technical scheme, during welding, part of the welding slag may fall into the pipeline along the weld and then block the second air hole, affecting inflation; the baffle can block the welding slag, reducing the possibility of the second air hole being blocked, so that the inert gas can flow smoothly into the pipeline, and the construction quality is improved.

[0020] Optionally, the third pipe body is provided with an exhaust hole, the exhaust hole is connected with the first air cavity, and the third pipe body is rotatably connected with a cover plate at the exhaust hole through a torsional spring, and the torsional spring causes the cover plate to have a tendency to rotate towards the exhaust hole.

[0021] By adopting the above technical scheme, during construction, the pipeline can be monitored according to the air pressure gauge on the air source, the pressure value of the air pressure gauge is unchanged during welding, after welding is completed, the weld is completely blocked, the inert gas cannot flow out, which will cause the pressure value to rise sharply, at this time, the air source needs to be closed in time, if the air source is not closed in time due to the negligence of the staff, a safety accident is easy to occur; due to the arrangement of the exhaust hole and the cover plate, even if the air source is not closed after welding is completed, as the pressure value rises, the cover plate will be opened, the inert gas can be discharged in time, the possibility of safety accidents is reduced, and the safety is high.

[0022] Optionally, the third pipe body is provided with a sleeve ring, a plurality of symmetrical anti-dropping rods are arranged on the sleeve ring in the axial direction of the sleeve ring, the anti-dropping rods are slidably connected to the sleeve ring, and a driving mechanism for driving the anti-dropping rods to slide and abut against the inner wall of the pipeline is arranged on the sleeve ring.

[0023] By adopting the technical scheme, the first pipe body, the second pipe body and the third pipe body are only fixed by the friction force between the rubber ring and the inner wall of the pipeline, and in the process of starting the gas source and normal inflation, the first pipe body, the second pipe body and the third pipe body may shake under the impact of the airflow, and then the rubber ring deviates, which not only increases the wear of the rubber ring and shortens the service life of the rubber ring, but also easily causes the rubber ring and the weld to be misaligned, so that the inert gas cannot be filled in the weld, and the construction quality is affected; under the action of the driving mechanism, the anti-disengagement rod abuts against the inner wall of the pipeline to fix the first pipe body, the second pipe body and the third pipe body, the possibility of deviation of the rubber ring is reduced, the service life of the rubber ring is prolonged, and the construction quality is improved.

[0024] Optionally, the driving mechanism comprises a driving block axially slidingly connected to the sleeve ring, the driving block is provided with an inclined surface, the end of the anti-disengagement rod abuts against the inclined surface, the driving block is provided with a driving rod, the driving rod extends to the outside of the pipeline, and the third pipe body is provided with a fixing assembly for fixing the driving rod.

[0025] By adopting the technical scheme, the driving rod is held and pushed to slide the driving block towards the anti-disengagement rod, under the action of the inclined surface, the driving block applies a pushing force to the anti-disengagement rod in the direction of the inner wall of the pipeline, the anti-disengagement rod slides in the direction of the inner wall of the pipeline until it abuts against the inner wall of the pipeline, and then the driving rod is fixed by using the fixing assembly, so that the operation is convenient, time-saving and labor-saving.

[0026] Optionally, the fixing assembly comprises a plug rod penetrating the driving rod, the driving rod is provided with a plug hole through which the plug rod penetrates, a plurality of plug slots for accommodating the plug rod are arranged on the third pipe body in the axial direction of the third pipe body, a spring is sleeved on the plug rod, one end of the spring is connected to the plug rod, and the other end of the spring is connected to the driving rod, and the spring makes the plug rod tend to slide in the direction close to the third pipe body.

[0027] By adopting the technical scheme, the plug rod is pulled out of the plug slot by pushing the driving rod, at this time, the spring is in a compressed state, when the anti-disengagement rod abuts against the inner wall of the pipeline, one of the plug slots is aligned with the plug rod, the plug rod is released, and under the action of the restoring force of the spring, the plug rod slides into the plug slot, and the driving rod is fixed, so that the operation is convenient and the fixation is stable.

[0028] In summary, the application has the following beneficial effects:

[0029] The first pipe body, the second pipe body and the third pipe body are slid into the pipeline to be welded, the two pressure expansion members are located on the two sides of the weld, and the two pressure expansion members are pressed and expanded and abut on the inner wall of the pipeline under the action of the driving assembly, so that the pipeline is blocked, the sliding in and out is relatively smooth, the operation is convenient, the spacing between the two pressure expansion members is small, the amount of inert gas is small, the filling time is short, the construction cost is low, and the efficiency is high. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of the embodiment of the application.

[0031] Figure 2 It is a sectional view of the overall structure of the embodiment of the application.

[0032] BRIEF DESCRIPTION OF DRAWINGS:

[0033] 1, first pipe body; 2, second pipe body; 3, third pipe body; 4, inner pipe; 41, limiting block; 5, rubber ring; 51, steel ring; 61, air nozzle; 62, first air cavity; 63, second air cavity; 64, first air hole; 65, third air cavity; 66, second air hole; 67, baffle; 71, exhaust hole; 72, torsional spring; 73, cover plate; 8, sleeve ring; 81, anti-dropping rod; 82, driving block; 83, inclined surface; 84, driving rod; 85, insertion rod; 86, insertion hole; 87, insertion slot; 88, spring; 91, first sliding groove; 92, second sliding groove. DETAILED DESCRIPTION

[0034] The application will be further described in detail below with reference to the drawings.

[0035] The embodiment is a medical gas pipeline welding inner sealing device, referring to Figure 1 and Figure 2 , comprising: a first pipe body 1 and a second pipe body 2 and a third pipe body 3 arranged at both ends of the first pipe body 1 respectively, the first pipe body 1, the second pipe body 2 and the third pipe body 3 are coaxial. Two first-end-to-last-end pressure expansion members are fixedly connected between the first pipe body 1 and the second pipe body 2 and between the first pipe body 1 and the third pipe body 3, the pressure expansion member is a rubber ring 5, two rubber rings 5 are fixedly connected with a steel ring 51, and the number of pressure expansion members can also be increased according to actual conditions.

[0036] The first pipe body 1 is provided with a driving assembly for driving the second pipe body 2 and the third pipe body 3 to move towards each other so that the two pressure expansion members are pressed and expanded. The driving assembly comprises an inner pipe 4 arranged in the second pipe body 2 and the first pipe body 1, a limiting block 41 is welded in the middle of the inner pipe 4, the limiting block 41 abuts against the end of the second pipe body 2, the end of the inner pipe 4 extends into the third pipe body 3, and the third pipe body 3 is threadedly connected with the inner pipe 4.

[0037] During construction, the inner tube 4 is slid into the first tube body 1 and the second tube body 2, and then the first tube body 1, the second tube body 2 and the third tube body 3 are slid into the two pipelines to be welded. The two groups of rubber rings 5 are respectively located on the two sides of the weld, and the second tube body 2 is partially located outside the pipeline, and the third tube body 3 is partially located outside the pipeline. One worker holds the end of the inner tube 4, and the other worker holds the end of the third tube body 3, pushes the third tube body 3, and makes the end of the second tube body 2 abut against the limiting block 41. Then the third tube body 3 is rotated to the inner tube 4, the rubber ring 5 is extruded and expanded, and abuts against the inner wall of the pipeline, so that the pipeline is blocked.

[0038] When sliding into and out of the pipeline, there is no friction between the rubber ring 5 and the inner wall of the pipeline, the sliding is relatively smooth, and the operation is convenient. Moreover, the spacing between the two pressure expansion pieces is small, the amount of inert gas used is small, the filling time is short, the construction cost is low, and the efficiency is high.

[0039] The third tube body 3 is welded with a sleeve ring 8 in the middle, four anti-drop rods 81 are symmetrically arranged on the sleeve ring 8 along the axial direction of the sleeve ring 8, the anti-drop rods 81 are slidably connected to the sleeve ring 8 along the radial direction of the sleeve ring 8, four first sliding grooves 91 are formed on the sleeve ring 8 for the sliding of the anti-drop rods 81, and a driving mechanism is arranged on the sleeve ring 8 for driving the anti-drop rods 81 to slide and abut against the inner wall of the pipeline.

[0040] The driving mechanism comprises a driving block 82 slidably connected to the sleeve ring 8 along the axial direction of the sleeve ring 8, a second sliding groove 92 is formed on the sleeve ring 8 for the sliding of the driving block 82, the second sliding groove 92 is in communication with the four first sliding grooves 91, an annular inclined surface 83 is arranged on one side of the driving block 82 close to the anti-drop rod 81, the end of the anti-drop rod 81 abuts against the inclined surface 83, a driving rod 84 is welded on the driving block 82 along the axial direction of the driving block 82, the driving rod 84 is eccentric to the driving block 82, and the driving rod 84 extends to the outside of the pipeline. The third tube body 3 is provided with a fixing assembly for fixing the driving rod 84.

[0041] The fixing assembly comprises an insertion rod 85 penetrating the driving rod 84, the insertion rod 85 is perpendicular to the driving rod 84, an insertion hole 86 is formed on the driving rod 84 for the insertion rod 85 to penetrate, five insertion grooves 87 are formed on the outer wall of the third tube body 3 along the axial direction of the third tube body 3 for accommodating the insertion rod 85, and different insertion grooves 87 are selected when welding pipelines with different diameters. A spring 88 is sleeved on one end of the insertion rod 85 close to the third tube body 3, one end of the spring 88 is connected to the insertion rod 85, and the other end of the spring 88 is connected to the driving rod 84. The spring 88 makes the insertion rod 85 have a tendency to slide towards the third tube body 3.

[0042] After the pipeline is blocked, the plug rod 85 is pulled out of the slot 87, and the spring 88 is in a compressed state at this time. The driving rod 84 is pushed to slide towards the anti-drop rod 81, and the driving rod 84 drives the driving block 82 to slide along the second sliding groove 92 towards the anti-drop rod 81. The inclined surface 83 on the driving block 82 exerts a pushing force on the anti-drop rod 81 in the direction of the inner wall of the pipeline. With the sliding of the driving block 82, the anti-drop rod 81 slides towards the inner wall of the pipeline until it abuts against the inner wall of the pipeline. One of the slots 87 is aligned with the plug rod 85, and the plug rod 85 is loosened. Under the action of the restoring force of the spring 88, the plug rod 85 rebounds into the slot 87, and the anti-drop rod 81 is fixed. The anti-drop rod 81 firmly fixes the first pipe body 1, the second pipe body 2 and the third pipe body 3 in the pipeline.

[0043] The third pipe body 3 is provided with an air nozzle 61 at the end thereof, and a first air cavity 62 is formed in the third pipe body 3. An inner pipe 4 is provided with an opening at one end close to the third pipe body 3, and a second air cavity 63 is formed in the inner pipe 4. Five first air holes 64 are equidistantly formed in the inner pipe 4 along the axial direction of the inner pipe 4. A third air cavity 65 is formed in the first pipe body 1, and five second air holes 66 are equidistantly formed in the first pipe body 1 along the axial direction of the first pipe body 1. The air nozzle 61, the first air cavity 62, the second air cavity 63, the first air hole 64, the third air cavity 65 and the second air hole 66 are sequentially connected.

[0044] During welding, welding slag will fall along the weld to the pipeline, blocking the second air hole 66 and affecting inflation. Therefore, in this embodiment, a baffle 67 is welded on the first pipe body 1 at the position of the second air hole 66, and the distance between the baffle 67 and the second air hole 66 is 2 cm.

[0045] In addition, an exhaust hole 71 is formed in the third pipe body 3, and the exhaust hole 71 is connected with the first air cavity 62. A cover plate 73 is rotatably connected to the third pipe body 3 at the position of the exhaust hole 71 by a torsion spring 72, and the torsion spring 72 causes the cover plate 73 to have a tendency to rotate towards the exhaust hole 71.

[0046] After the first pipe body 1, the second pipe body 2 and the third pipe body 3 are fixed stably, the air nozzle 61 is connected with an inflation pipe of an air compressor pump, the air compressor pump is turned on, and inert gas enters the pipeline after sequentially passing through the air nozzle 61, the first air cavity 62, the second air cavity 63, the first air hole 64, the third air cavity 65 and the second air hole 66, and finally is discharged from the weld. After all the air in the pipeline is replaced, welding is started. During welding, the air pressure in the pipeline remains unchanged with the flow of inert gas. After welding is completed, the weld is completely blocked, the air pressure in the pipeline increases, the cover plate 73 is pushed open, the inert gas in the pipeline passes through the exhaust hole 71 and is discharged, and the air compressor pump can be closed in time.

[0047] The implementation principle of the medical gas pipeline welding inner plugging device is as follows: during construction, the inner pipe 4 is slid into the first pipe body 1 and the second pipe body 2, and then the first pipe body 1, the second pipe body 2 and the third pipe body 3 are slid into two pipelines to be welded, and the two groups of rubber rings 5 are respectively located on the two sides of the weld. The limiting block 41 is abutted against the end of the second pipe body 2, and the third pipe body 3 is screwed onto the inner pipe 4, so that the rubber ring 5 is extruded and expanded and abuts tightly against the inner wall of the pipeline.

[0048] The driving rod 84 is pushed to move, the driving rod 84 drives the driving block 82 to move, the driving block 82 drives the anti-disengagement rod 81 to move, until the anti-disengagement rod 81 abuts tightly against the inner wall of the pipeline, the driving rod 84 is fixed by the insertion rod 85, and the anti-disengagement rod 81 is fixed.

[0049] The air nozzle 61 is butted against the inflation pipe, the air compressor is started, and the inert gas enters the pipeline after sequentially passing through the air nozzle 61, the first air cavity 62, the second air cavity 63, the first air hole 64, the third air cavity 65 and the second air hole 66, after the air replacement is completed, welding is started, after the welding is completed, the cover plate 73 is opened, the excess inert gas is discharged from the exhaust hole 71, and the air compressor can be closed in time.

[0050] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application, so that: equivalent changes made according to the structure, shape and principle of the present application should be covered in the protection scope of the present application.

Claims

1. A welding internal sealing device for medical gas pipelines, characterized in that, include: The first tube (1) and the second tube (2) and the third tube (3) respectively located at both ends of the first tube (1) are coaxial. The first tube (1), the second tube (2) and the third tube (3) are provided with pressure-bearing expansion members between the first tube (1) and the second tube (2) and between the first tube (1) and the third tube (3). The first tube (1) is provided with a drive assembly for driving the second tube (2) and the third tube (3) to move towards each other so that the two pressure-bearing expansion members are squeezed and expanded. The drive assembly includes an inner tube (4) that passes through the second tube (2) and the first tube (1). The inner tube (4) is provided with a limiting block (41). The limiting block (41) abuts against the end of the second tube (2). The third tube (3) is threadedly connected to the end of the inner tube (4) away from the limiting block (41). The third tube (3) is provided with an air nozzle (61) at its end. The third tube (3) is provided with a first air chamber (62). The inner tube (4) is provided with a second air chamber (63). The inner tube (4) is provided with a first air hole (64). The first tube (1) is provided with a third air chamber (65). The first tube (1) is provided with a second air hole (66). The air nozzle (61), the first air chamber (62), the second air chamber (63), the first air hole (64), the third air chamber (65), and the second air hole (66) are connected in sequence.

2. The medical gas pipeline welding internal sealing device according to claim 1, characterized in that: The pressure-bearing expansion component is a rubber ring (5).

3. The medical gas pipeline welding internal sealing device according to claim 2, characterized in that: At least two rubber rings (5) connected end to end are provided between the first tube (1) and the second tube (2) and between the first tube (1) and the third tube (3), and a steel ring (51) is provided between adjacent rubber rings (5).

4. The medical gas pipeline welding internal sealing device according to claim 1, characterized in that: A baffle (67) is provided on the first tube (1) at the second air hole (66), and a predetermined gap is left between the baffle (67) and the second air hole (66).

5. The medical gas pipeline welding internal sealing device according to claim 1, characterized in that: The third tube (3) is provided with an exhaust hole (71), which is connected to the first air chamber (62). A cover plate (73) is rotatably connected to the exhaust hole (71) on the third tube (3) via a torsion spring (72). The torsion spring (72) causes the cover plate (73) to rotate toward the exhaust hole (71).

6. The medical gas pipeline welding internal sealing device according to claim 1, characterized in that: The third pipe body (3) is provided with a collar (8), and a plurality of symmetrically distributed anti-detachment rods (81) are provided on the collar (8) along the axial direction of the collar (8). The anti-detachment rods (81) are slidably connected to the collar (8), and the collar (8) is provided with a driving mechanism for driving the anti-detachment rods (81) to slide and press the anti-detachment rods (81) against the inner wall of the pipe.

7. The medical gas pipeline welding internal sealing device according to claim 6, characterized in that: The driving mechanism includes a driving block (82) slidably connected to the collar (8) along the axial direction of the collar (8). The driving block (82) is provided with an inclined surface (83). The end of the anti-detachment rod (81) abuts against the inclined surface (83). The driving block (82) is provided with a driving rod (84). The driving rod (84) extends to the outside of the pipe. The third pipe body (3) is provided with a fixing component for fixing the driving rod (84).

8. The medical gas pipeline welding internal sealing device according to claim 7, characterized in that: The fixing assembly includes a plug (85) that passes through the drive rod (84). The drive rod (84) has a plug hole (86) for the plug (85) to pass through. The third tube (3) has a plurality of slots (87) along the axial direction of the third tube (3) for accommodating the plug (85). A spring (88) is sleeved on the plug (85). One end of the spring (88) is connected to the plug (85), and the other end of the spring (88) is connected to the drive rod (84). The spring (88) causes the plug (85) to slide towards the third tube (3).

Images