Airtight quick detection device for corrugated pipe of gas flexible connection pipe

Abstract

The application relates to a gas-tight quick detection device for a corrugated pipe of a gas flexible connection pipe, which comprises a strip-shaped transverse bottom plate, a plurality of vertical supporting vertical plates fixedly connected to the bottom plate, a strip-shaped water tank fixedly connected to the upper end of the supporting vertical plate, a transverse supporting plate inserted into the water tank, vertical front supporting plates and rear supporting plates respectively formed by bending the front side and the rear side of the supporting plate, a horizontal bottom sealing plate fixedly connected between the front supporting plate and the rear supporting plate, vertical side sealing plates respectively formed by bending the left side and the right side of the bottom sealing plate, the side sealing plates being fixedly connected with the front supporting plate, the rear supporting plate and the supporting plate, the bottom sealing plate, the side sealing plate, the front supporting plate, the rear supporting plate and the supporting plate being enclosed to form a sealed gas cavity, a plurality of longitudinal overflow grooves being formed on the supporting plates on the left side and the right side of the sealed gas cavity, and two groups of opposite gas-tight connecting seats being respectively fixedly connected to the upper end faces of the left end and the right end of the supporting plate. The gas-tight quick detection device is convenient for sealing connection of the corrugated pipe, simultaneously realizes gas feeding at two ends, and improves the efficiency of gas-tight detection.

Description

Technical Field

[0001] This invention relates to the technical field of pipe diameter airtightness testing, and more specifically to a rapid airtightness testing device for corrugated pipes used in gas flexible connections. Background Technology

[0002] Gas connection pipes are crucial components connecting gas appliances and gas pipelines, and their safety and reliability directly affect gas safety in homes and public places. There are currently three types of gas connection pipes: rubber hoses, metal corrugated pipes, and metal-coated pipes. Metal-coated pipes consist of an inner metal corrugated pipe and an outer rubber hose, combining the advantages of the former two. Metal-clad corrugated pipes are typically made by welding strip material into straight pipes, then using a corrugated pipe forming machine to transform the straight pipes into corrugated pipes. The corrugated pipes are then cut into sections as needed. After cutting, the corrugated pipes require airtightness testing to prevent leaks. Current airtightness testing methods involve sealing one end of the corrugated pipe and connecting the other end to a sealed socket of an airtightness testing device. Air is introduced into one end of the corrugated pipe, and the pressure fluctuation is used to determine if a leak exists. However, this method cannot quickly pinpoint the location of leaks. Furthermore, for longer corrugated pipes, testing from one end is slow, and the current sealing connection for air intake is cumbersome. A faster, more efficient airtightness testing device is needed. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing a rapid airtightness detection device for corrugated pipes used in gas flexible connections. This device facilitates the sealing connection of the corrugated pipe openings, allows air intake at both ends to improve the efficiency of airtightness detection, and can also immerse the corrugated pipe in water in a water tank to quickly detect leaks and facilitate repairs.

[0004] A rapid airtightness testing device for a corrugated pipe used in a gas flexible connection includes a strip-shaped horizontal base plate, several vertical support plates fixedly connected to the base plate, a strip-shaped horizontal water trough fixedly connected to the upper end of the support plates, a horizontal support plate inserted in the water trough, vertical front support plates and rear support plates bent into the front and rear sides of the support plate respectively, a horizontal bottom sealing plate inserted and fixed between the front and rear support plates, vertical side sealing plates bent into the left and right sides of the bottom sealing plate respectively, the side sealing plates being fixedly connected to the front support plate, rear support plate and support plate respectively, the bottom sealing plate, side sealing plate, front support plate, rear support plate and support plate forming a sealed air cavity, several longitudinal overflow grooves formed on the support plates on the left and right sides of the sealed air cavity; two sets of opposing airtight connection seats are fixedly connected to the upper surfaces of the left and right ends of the support plate respectively.

[0005] The airtight connector includes a base. A circular insertion hole is formed on the end face of the base near the center of the water tank. A rectangular annular groove is formed on the inner wall of the insertion hole. A rectangular annular rubber airbag is inserted and fixed within the annular groove. A circular connecting groove is formed on the end face of the rubber airbag opposite the center of the water tank. An arc-shaped air inlet groove connected to the connecting groove is formed inside the base below the insertion hole. An air inlet pipe, vertically aligned and connected to the arc-shaped air inlet groove, is inserted and fixed to the bottom of the base. The lower end of the air inlet pipe passes through… The water tank is fixedly connected to a quick-connect air pipe connector; a valve hole is formed in the base on the upper side of the insertion hole, which is transverse and connected to the connecting groove. A stepped hole is formed on the bottom surface of the valve hole, which penetrates the base. A T-shaped valve shaft is inserted into the stepped hole. The end of the valve shaft passes through a spring and is fixed to a sealing valve block. One end of the spring presses against the bottom surface of the valve hole and the other end presses against the sealing valve block. The sealing valve block presses against the inner wall at the inlet of the valve hole; a bypass hole connected to the valve hole is formed in the middle of the bottom surface of the insertion hole.

[0006] A lifting assembly is provided between the water tank and the bottom plate. The lifting assembly includes two sets of vertical guide columns. The upper end of the guide column passes through the water tank and is fixed to the bottom sealing plate. The lower end of the guide column is fixed to a horizontal linkage plate. Several vertical descent cylinders are fixed to the lower end surface of the linkage plate. The piston rod of the descent cylinder passes through the linkage plate and is fixed to the water tank.

[0007] Preferably, the upper end of the water tank is formed with an inclined limiting surface, the front side of the limiting surface is higher than the rear side of the limiting surface, an inclined feeding slide is fixed to the rear end face of the water tank, the front side of the feeding slide is higher than the rear side of the limiting surface but lower than the rear side of the feeding slide, an inclined discharging slide is fixed to the front end face of the water tank, the front side of the discharging slide is lower than the rear side of the discharging slide, and the rear side of the discharging slide is higher than the front side of the limiting surface; the pallet is inclined, the front side of the pallet is lower than the rear side of the pallet.

[0008] The two sides of the feeding slide are bent and formed with side baffles.

[0009] Preferably, a vertical lifting cylinder is fixedly connected to the lower end face of the water tank, and the end of the piston rod of the lifting cylinder and the end of the piston rod of the lowering cylinder are fixedly connected together.

[0010] Preferably, a horizontal strip-shaped support arm is provided above the front side of the support plate, and vertical connecting plates are fixed to the left and right ends of the support arm, with the lower end of the connecting plate fixed to the support plate on the front side of the airtight connecting seat.

[0011] The support arm is fixed with several longitudinally inclined pressing pipe components. The pressing pipe components include inclined limiting pressure plates. The rear end of the limiting pressure plate is higher than the front end and is bent into a hook. An inclined support is fixed to the upper surface of the middle part of the limiting pressure plate. The front end of the inclined support is bent into a vertical rib. The lower end of the rib is fixed to the support arm. The upper end of the rib is fixed to a T-shaped limiting block. Several slots opposite to the limiting blocks are formed on the front surface of the water tank. The discharge slide plate is formed with clearance slots opposite to the limiting blocks.

[0012] Preferably, the piston rod of the lowering cylinder is in a retracted state, the piston rod of the raising cylinder is in an extended state, and the stroke of the raising cylinder is greater than the vertical distance between the rear side of the discharge slide and the front side of the pallet.

[0013] The stroke of the lowering cylinder is no greater than the vertical distance from the bottom sealing plate to the bottom of the water tank.

[0014] Preferably, the central axis of the insertion hole on the airtight connector coincides with the central axis of the rubber airbag; the inner wall of the rubber airbag and the inner wall of the insertion hole are on the same cylindrical surface.

[0015] Preferably, an inner liner tube connected to a bypass hole is inserted and fixed into the insertion hole of the airtight connector. The central axis of the inner liner tube coincides with the central axis of the rubber airbag, and the diameter of the outer wall of the inner liner tube is smaller than the diameter of the inner wall of the rubber airbag.

[0016] The beneficial effects of this invention are as follows:

[0017] This rapid airtightness testing device facilitates the sealing connection of the corrugated pipe openings, while allowing air to enter from both ends, improving the efficiency of airtightness testing. It can also immerse the corrugated pipe in water in a tank, enabling rapid detection of leaks and facilitating repairs. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0019] Figure 2 This is a three-dimensional structural schematic diagram of the present invention from another angle;

[0020] Figure 3 This is a partial cross-sectional view of the rear view of the present invention;

[0021] Figure 4 for Figure 3 Schematic diagram of the cross section at point AA;

[0022] Figure 5 for Figure 3 A magnified view of a portion of point B in the middle.

[0023] In the diagram: 1. Base plate; 2. Support plate; 3. Water tank; 4. Support plate; 41. Rear support plate; 42. Front support plate; 43. Overflow tank; 5. Airtight connection seat; 51. Base; 52. Rubber airbag; 53. Sealing valve block; 54. Valve shaft; 55. Spring; 6. Bottom sealing plate; 7. Lifting assembly; 71. Guide column; 72. Linkage plate; 73. Lowering cylinder; 74. Raising cylinder; 8. Support arm; 81. Connecting plate; 9. Press fitting; 91. Limiting pressure plate; 92. Diagonal support; 93. Limiting block; 10. Discharge slide plate; 11. Clearance slot; 11. Feed slide plate; 111. Side baffle; 12. Air inlet pipe. Detailed Implementation

[0024] Example: See Figures 1 to 5 As shown, a quick airtightness testing device for a corrugated pipe used in a gas flexible connection includes a strip-shaped horizontal base plate 1. Several vertical support plates 2 are fixedly connected to the base plate 1. A strip-shaped horizontal water trough 3 is fixedly connected to the upper end of each support plate 2. A horizontal support plate 4 is inserted into the water trough 3. Vertical front support plate 42 and rear support plate 41 are bent into shape on the front and rear sides of the support plate 4, respectively. A horizontal bottom sealing plate 6 is inserted and fixed between the front support plate 42 and the rear support plate 41. The left and right sides of the sealing plate 6 are bent into vertical side sealing plates, which are fixedly connected to the front support plate 42, the rear support plate 41 and the support plate 4 respectively. The bottom sealing plate 6, the side sealing plates, the front support plate 42, the rear support plate 41 and the support plate 4 form a sealed air cavity. Several longitudinal overflow grooves 43 are formed on the support plates 4 on the left and right sides of the sealed air cavity. Two sets of opposing airtight connecting seats 5 are fixedly connected to the upper surfaces of the left and right ends of the support plate 4 respectively.

[0025] The airtight connector 5 includes a base 51. A circular insertion hole 511 is formed on the end face of the base 51 near the middle of the water tank 3. A rectangular annular groove 512 is formed on the inner wall of the insertion hole 511. A rectangular annular rubber airbag 52 is inserted and fixed within the annular groove 512. A circular connecting groove 521 is formed on the end face of the rubber airbag 52 opposite to the middle of the water tank 3. An arc-shaped air inlet groove 513, connected to the connecting groove 521, is formed inside the base 51 below the insertion hole 511. An air inlet pipe 12, vertically aligned and connected to the arc-shaped air inlet groove 513, is inserted and fixed to the bottom of the base 51. The lower end of the air inlet pipe 12 passes through the water tank 3. A quick-connect endotracheal connector is fixedly connected; a valve hole 514 is formed in the base 51 on the upper side of the insertion hole 511, which is transverse and communicates with the connecting groove 521. A stepped hole 515 is formed on the bottom surface of the valve hole 514, which penetrates the base 51. A T-shaped valve shaft 54 ​​is inserted into the stepped hole 515. The end of the valve shaft 54 ​​passes through a spring 55 and is fixedly inserted into a sealing valve block 53. One end of the spring 55 presses against the bottom surface of the valve hole 514 and the other end presses against the sealing valve block 53. The sealing valve block 53 presses against the inner wall at the inlet of the valve hole 514; a bypass hole 516 communicating with the valve hole 514 is formed in the middle of the bottom surface of the insertion hole 511.

[0026] A lifting assembly 7 is provided between the water tank 3 and the bottom plate 1. The lifting assembly 7 includes two sets of vertical guide columns 71. The upper end of the guide column 71 passes through the water tank 3 and is fixed to the bottom sealing plate 6. The lower end of the guide column 71 is fixed to a horizontal linkage plate 72. Several vertical lowering cylinders 73 are fixed to the lower end surface of the linkage plate 72. The piston rod of the lowering cylinder 73 passes through the linkage plate 72 and is fixed to the water tank 3.

[0027] The upper end of the water tank 3 is formed with an inclined limiting surface 31, the front side of the limiting surface 31 is higher than the rear side of the limiting surface 31, and an inclined feeding slide plate 11 is fixedly connected to the rear end face of the water tank 3. The front side of the feeding slide plate 11 is higher than the rear side of the limiting surface 31 but lower than the rear side of the feeding slide plate 11. An inclined discharging slide plate 10 is fixedly connected to the front end face of the water tank 3. The front side of the discharging slide plate 10 is lower than the rear side of the discharging slide plate 10, and the rear side of the discharging slide plate 10 is higher than the front side of the limiting surface 31. The support plate 4 is inclined, and the front side of the support plate 4 is lower than the rear side of the support plate 4. The discharging slide plate 10 and the feeding slide plate 11 facilitate the feeding and discharging of the corrugated pipe, especially for some long corrugated pipes.

[0028] The two sides of the feeding slide plate 11 are bent to form side baffles 111.

[0029] A vertical lifting cylinder 74 is fixedly connected to the lower end face of the water tank 3. The end of the piston rod of the lifting cylinder 74 and the end of the piston rod of the lowering cylinder 73 are fixedly connected together. The aforementioned discharge slide plate 10, in conjunction with the lifting cylinder 74, can realize the automatic exit of the bellows from the water tank 3, and then slide down the discharge slide plate 10 to discharge the material.

[0030] A horizontal strip-shaped support arm 8 is provided above the front side of the support plate 4. Vertical connecting plates 81 are fixed to the left and right ends of the support arm 8, and the lower end of the connecting plate 81 is fixed to the support plate 4 on the front side of the airtight connecting seat 5.

[0031] Several longitudinally inclined pressing pipe fittings 9 are fixedly connected to the support arm 8. Each pressing pipe fitting 9 includes an inclined limiting pressure plate 91. The rear end of the limiting pressure plate 91 is higher than its front end and is bent into a hook 911. An inclined support 92 is fixedly connected to the upper surface of the middle part of the limiting pressure plate 91. The front end of the inclined support 92 is bent into a vertical rib. The lower end of the rib is fixedly connected to the support arm 8, and the upper end of the rib is fixedly connected to a T-shaped limiting block 93. Several slots 31 opposite to the limiting blocks 93 are formed on the front surface of the water tank 3. An clearance slot 101 opposite to the limiting blocks 93 is formed on the discharge slide plate 10. When the corrugated pipe undergoes an airtightness test, because... Since the length of the corrugated pipes being tested varies, the aforementioned pressure fitting 9 structure is not needed for straightened corrugated pipes. However, for some longer corrugated pipes, the middle part of the corrugated pipe may float on the water surface. Therefore, a limiting pressure plate 91 that moves with the support plate 4 is added. The limiting pressure plate 91 can be pressed down to make the corrugated pipe submerged in the water tank 3, thereby revealing the leakage point. The inclined support 92 and the limiting block 93 can both reinforce the limiting pressure plate 91. When the support plate 4 moves down, the limiting block 93 can be inserted into the slot 31 of the water tank 3. The water tank 3 is located at the supporting point provided by the limiting pressure plate 91 to prevent the support arm 8 from deforming.

[0032] The piston rod of the lowering cylinder 73 is in a retracted state, and the piston rod of the raising cylinder 74 is in an extended state. The stroke of the raising cylinder 74 is greater than the vertical distance between the rear side of the discharge slide plate 10 and the front side of the pallet 4, and greater than the vertical distance between the rear side of the pallet 4 and the rear side of the water tank 3. The stroke of the lowering cylinder 73 is not greater than the vertical distance between the bottom sealing plate 6 and the bottom surface of the water tank 3.

[0033] The central axis of the insertion hole 511 on the airtight connector 5 coincides with the central axis of the rubber airbag 52; the inner wall of the rubber airbag 52 and the inner wall of the insertion hole 511 are on the same cylindrical surface.

[0034] An inner liner tube connected to the bypass hole 516 is inserted and fixed in the insertion hole 511 of the airtight connector 5. The central axis of the inner liner tube coincides with the central axis of the rubber airbag 52. The diameter of the outer wall of the inner liner tube is smaller than the diameter of the inner wall of the rubber airbag 52. The inner liner tube can be inserted into the opening of the corrugated pipe to support the inner wall of the corrugated pipe and prevent the corrugated pipe from deforming.

[0035] Working principle: This structure is an airtightness rapid testing device, and its structure is as follows: Figure 1As shown, the bellows rests on the support plate 4, and both ends of the bellows are inserted into the insertion holes 511 of the airtight connection seat 5. Then, air enters through the air inlet pipe 12, first causing the rubber airbag 52 to inflate. The inner wall of the rubber airbag 52 will press against the outer wall of the bellows, achieving a sealed connection at both ends of the bellows. Then, the air pressure will drive the sealing valve block 53 to move in the valve hole 514, achieving communication between the bypass hole 516 and the rubber airbag 52. The gas input through the air inlet pipe 12 can then enter the bellows through the rubber airbag 52, i.e., sealing first and then inflating.

[0036] Then, the tray 4 is driven to move down, so that the corrugated pipe is submerged in water. Because the tray 4 has a sealed air chamber, the water in the water tank 3 will move upward when the sealed air chamber enters the water. Therefore, the downward stroke does not need to be large, and water will not splash out of the water tank 3 due to the rapid downward movement. It also facilitates rapid detection.

[0037] The embodiments described are illustrative of the invention and are not intended to limit the invention. Any person skilled in the art can modify the embodiments without departing from the spirit and scope of the invention; therefore, the scope of protection of the invention should be as set forth in the claims.

Claims

1. A rapid airtightness testing device for a corrugated pipe used in a gas flexible connection, comprising a strip-shaped transverse base plate (1), a plurality of vertical support plates (2) fixedly connected to the base plate (1), and a strip-shaped transverse water tank (3) fixedly connected to the upper end of the support plates (2), characterized in that: A horizontal support plate (4) is inserted into the water tank (3). The front and rear sides of the support plate (4) are bent into vertical front support plate (42) and rear support plate (41), respectively. A horizontal bottom sealing plate (6) is inserted and fixed between the front support plate (42) and the rear support plate (41). The left and right sides of the bottom sealing plate (6) are bent into vertical side sealing plates, respectively. The side sealing plates are fixed to the front support plate (42), the rear support plate (41) and the support plate (4), respectively. The bottom sealing plate (6), the side sealing plate, the front support plate (42), the rear support plate (41) and the support plate (4) form a sealed air cavity. Several longitudinal overflow grooves (43) are formed on the support plates (4) on the left and right sides of the sealed air cavity. Two sets of opposing airtight connecting seats (5) are fixed to the upper surfaces of the left and right ends of the support plate (4), respectively. The airtight connector (5) includes a base (51). A circular insertion hole (511) is formed on the end face of the base (51) near the middle of the water tank (3). A rectangular annular groove (512) is formed on the inner wall of the insertion hole (511). A rectangular annular rubber airbag (52) is inserted and fixed in the annular groove (512). A circular connecting groove (521) is formed on the end face of the rubber airbag (52) away from the middle of the water tank (3). An arc-shaped air inlet groove (513) connected to the connecting groove (521) is formed in the base (51) below the insertion hole (511). An air inlet pipe (12) connected to the arc-shaped air inlet groove (513) and vertically aligned is inserted and fixed at the bottom of the base (51). The lower end of the air inlet pipe (12) passes through the water tank (3). The duct is fixedly connected with a quick-connect fitting; a valve hole (514) is formed in the base (51) on the upper side of the insertion hole (511) and is connected to the connecting groove (521) in the transverse direction; a stepped hole (515) is formed on the bottom surface of the valve hole (514) and penetrates the base (51); a T-shaped valve shaft (54) is inserted into the stepped hole (515); a sealing valve block (53) is fixed to the end of the valve shaft (54) through the spring (55); one end of the spring (55) presses against the bottom surface of the valve hole (514) and the other end presses against the sealing valve block (53); the sealing valve block (53) presses against the inner wall at the entrance of the valve hole (514); a bypass hole (516) connected to the valve hole (514) is formed in the middle of the bottom surface of the insertion hole (511). A lifting assembly (7) is provided between the water tank (3) and the bottom plate (1). The lifting assembly (7) includes two sets of vertical guide columns (71). The upper end of the guide column (71) passes through the water tank (3) and is fixed to the bottom sealing plate (6). The lower end of the guide column (71) is fixed to a horizontal linkage plate (72). Several vertical lowering cylinders (73) are fixed to the lower end surface of the linkage plate (72). The piston rod of the lowering cylinder (73) passes through the linkage plate (72) and is fixed to the water tank (3). The upper end of the water tank (3) is formed with an inclined limiting surface (31), the front side of the limiting surface (31) is higher than the rear side of the limiting surface (31), the rear end face of the water tank (3) is fixed with an inclined feeding slide plate (11), the front side of the feeding slide plate (11) is higher than the rear side of the limiting surface (31) and lower than the rear side of the feeding slide plate (11), the front end face of the water tank (3) is fixed with an inclined discharge slide plate (10), the front side of the discharge slide plate (10) is lower than the rear side of the discharge slide plate (10), and the rear side of the discharge slide plate (10) is higher than the front side of the limiting surface (31); the pallet (4) is inclined, the front side of the pallet (4) is lower than the rear side of the pallet (4); the two sides of the feeding slide plate (11) are bent to form side baffles (111). A horizontal strip-shaped support arm (8) is provided above the front side of the support plate (4). The left and right ends of the support arm (8) are respectively fixed with vertical connecting plates (81). The lower end of the connecting plate (81) is fixed to the support plate (4) on the front side of the airtight connecting seat (5). The support arm (8) is fixed with several longitudinally inclined pressure pipe fittings (9). The pressure pipe fittings (9) include inclined limiting pressure plates (91). The rear end of the limiting pressure plate (91) is higher than the front end of the limiting pressure plate (91) and is bent into a hook (911). An inclined support (92) is fixed on the upper end surface of the middle part of the limiting pressure plate (91). The front end of the inclined support (92) is bent into a vertical rib. The lower end of the rib is fixed on the support arm (8). The upper end of the rib is fixed with a T-shaped limiting block (93). Several slots opposite to the limiting block (93) are formed on the front end surface of the water tank (3). An avoidance slot (101) opposite to the limiting block (93) is formed on the discharge slide plate (10).

2. The gas tightness rapid testing device for a corrugated pipe for a gas flexible connection according to claim 1, characterized in that: A vertical lifting cylinder (74) is fixedly connected to the lower end face of the water tank (3), and the end of the piston rod of the lifting cylinder (74) and the end of the piston rod of the lowering cylinder (73) are fixedly connected together.

3. The gas tightness rapid testing device for a corrugated pipe for a gas flexible connection according to claim 2, characterized in that: The piston rod of the lowering cylinder (73) is in a retracted state, and the piston rod of the raising cylinder (74) is in an extended state. The stroke of the raising cylinder (74) is greater than the vertical distance between the rear side of the discharge slide plate (10) and the front side of the pallet (4). The stroke of the lowering cylinder (73) is no greater than the vertical distance from the bottom sealing plate (6) to the bottom surface of the water tank (3).

4. The gas tightness rapid testing device for a corrugated pipe for a gas flexible connection according to claim 1, characterized in that: The central axis of the insertion hole (511) on the airtight connector (5) coincides with the central axis of the rubber airbag (52); the inner wall of the rubber airbag (52) and the inner wall of the insertion hole (511) are in the same cylindrical surface.

5. The gas tightness rapid testing device for a corrugated pipe for a gas flexible connection according to claim 4, characterized in that: An inner liner tube connected to the bypass hole (516) is inserted and fixed in the insertion hole (511) of the airtight connector (5). The central axis of the inner liner tube coincides with the central axis of the rubber airbag (52). The diameter of the outer wall of the inner liner tube is smaller than the diameter of the inner wall of the rubber airbag (52).

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