CN211477525U - Bellows air tightness performance detection device - Google Patents

Abstract

The utility model discloses a device for detecting the airtightness of a corrugated pipe, which comprises a placing table and a tubular piece, wherein the upper end surface of the placing table is provided with a placing through hole for fixing the corrugated pipe; the inside of the tubular piece is a sealed detection cavity, the tubular piece is buckled on the placing table and is fixedly sealed, and the sealed detection cavity correspondingly contains the corrugated pipe; the upper part of the sealed detection cavity is provided with a vacuum pumping hole communicated with a pumping device; an air cylinder is arranged below the placing table, the lower part of the corrugated pipe penetrates through the placing through hole to be in transmission connection with the air cylinder, and the air cylinder drives the corrugated pipe to open and close. The utility model discloses can test the sealing performance that is in the bellows under the different flexible states, and the operating procedure is simple relatively.

Description

Bellows air tightness performance detection device

Technical Field

The utility model relates to a bellows detects technical field, especially relates to a bellows airtightness performance detection device.

Background

The bellows need carry out the detection of gas tightness ability to it after production is accomplished to whether observe it and have the gas leakage phenomenon, ensure the quality and the safety of bellows. The existing common device on the market can only detect the air tightness performance of the corrugated pipe when the corrugated pipe is in a static state, and the corrugated pipe can be opened and closed and contracted in the actual working process. The standard air tightness of the corrugated pipe in the contraction state does not mean that the corrugated pipe has the same air tightness in the extension state, so that a device for conveniently testing the air tightness of the corrugated pipe in different states is needed.

Disclosure of Invention

The purpose of the invention is as follows: in order to overcome the not enough of existence among the prior art, the utility model provides a bellows air tightness performance detection device conveniently tests the air tightness performance of the bellows under the different flexible state.

The technical scheme is as follows: in order to achieve the purpose, the device for detecting the air tightness of the corrugated pipe comprises a placing table and a tubular piece, wherein a placing through hole for fixing the corrugated pipe is formed in the upper end surface of the placing table; the inside of the tubular piece is a sealed detection cavity, the tubular piece is buckled on the placing table and is fixedly sealed, and the sealed detection cavity correspondingly contains the corrugated pipe; the upper part of the sealed detection cavity is provided with a vacuum pumping hole communicated with a pumping device; an air cylinder is arranged below the placing table, the lower part of the corrugated pipe penetrates through the placing through hole to be in transmission connection with the air cylinder, and the air cylinder drives the corrugated pipe to open and close. The setting of cylinder can make the utility model discloses detect the bellows and open and shut the gas tightness under the contraction state at the difference, it is higher to detect the precision.

Further, a sealing gasket is arranged between the placing table and the tubular piece; the upper end surface of the placing table is provided with a plurality of oblique clamping grooves, and the lower end surface of the tubular part is correspondingly provided with a plurality of oblique clamping blocks; a push plate device is arranged at one end of the upper end surface of the placing table, the plate surface of the push plate device is pressed against one side of the lower part of the tubular part, and the oblique clamping block and the oblique clamping groove are pushed to be clamped with each other; the moving direction of the push plate device is inclined downwards at an angle relative to the upper end surface of the placing table. The arrangement of the oblique clamping block, the oblique clamping groove and the push plate device can simplify the sealing and fixing step between the placing table and the tubular part, and the use is more convenient. The inclination angle setting of push pedal device and the bench face of placing makes the push pedal can promote to place the platform and the mutual pressfitting of tubulose piece.

Furthermore, a bolt through hole and a push plate inclined plane are arranged on one side of the placing table, and the push plate inclined plane is inclined downwards at an angle relative to the upper end surface of the placing table; the push plate device is composed of a sliding push plate and a rotating bolt, the rotating bolt is in bolted fit with a bolt through hole, the tail end of the rotating bolt is rotatably connected with the sliding push plate, and the rotating bolt rotates and pushes the sliding push plate to slide along the inclined surface of the push plate. The specific structure of the push plate device is expanded and defined.

Furthermore, the surface of the sliding push plate is in a convex arc shape, and the surface of the sliding push plate is covered with a soft elastic layer; the matching contact surface of the tubular part and the sliding push plate is in an inwards concave arc shape; the arc radius of the matching contact surface is larger than that of the sliding push plate. The arc setting of slip push pedal and cooperation contact surface to and the setting of soft elastic layer can make and become the face contact by the point contact between slip push pedal and the cooperation contact surface, and the cooperation is effectual.

Furthermore, the inclined fixture block consists of an extension block, an inclined plane block and an elastic block; the extension block is L-shaped and comprises a vertical plate part and a transverse plate part which are integrally arranged, and the vertical plate part is fixedly connected to the lower end face of the tubular part; one end of the inclined plane block is rotatably arranged on the transverse plate part, and the other end of the inclined plane block is connected with the transverse plate part through an elastic block; the inclined clamping groove is internally provided with an inclined clamping piece, a lower inclined plane of the inclined clamping piece is correspondingly matched with an upper inclined plane of the inclined plane block, and the inclination angle of the lower inclined plane and the vertical direction is larger than that of the upper inclined plane and the vertical direction. The structures of the oblique clamping block and the oblique clamping groove are unfolded and limited, the oblique clamping block and the oblique clamping groove can be promoted to be tightly attached to the placing table and the tubular part under the pushing of the push plate device due to the arrangement of the oblique block, the elastic block and the oblique clamping piece, and the sealing effect is good.

Further, the internal cross section of the sealed detection cavity is oval. With the shape looks adaptation of bellows, make things convenient for the shrink motion of opening and shutting of bellows, leave the space for tubular member and place the relative displacement that needs go on between the platform simultaneously.

Further, the binding surfaces of the tubular part and the placing table are obliquely arranged. Compared with the horizontal plane, the inclined plane can enable the placing table to have a larger operation space, and meanwhile, the internal condition of the sealed detection cavity is easy to observe.

Has the advantages that: the air tightness performance detection device for the corrugated pipe is characterized in that the air cylinder is arranged below the placing table of the corrugated pipe and is connected with the lower part of the corrugated pipe, and the corrugated pipe can be driven to move in a stretching mode when the air tightness of the corrugated pipe is detected, so that the air tightness performance of the corrugated pipe in different stretching states can be tested; the placing table and the tubular member are sealed and fixed through the oblique clamping groove, the oblique clamping block and the push plate, so that the operation is more convenient compared with the traditional bolt fixing; the inclined block, the elastic block and the inclined clamping piece are arranged, so that the inclined clamping block and the inclined clamping groove can promote the placing table and the tubular piece to be tightly attached under the pushing of the push plate device, and the sealing effect is good.

Drawings

FIG. 1 is a schematic diagram of the operation of the present invention;

FIG. 2 is a schematic view of a placement table;

FIG. 3 is a schematic view of a tubular structure;

FIG. 4 is a schematic structural view of an oblique fixture block;

FIG. 5 is a side sectional view of an oblique slot;

FIG. 6 is a schematic diagram of the operation of the plate pushing device.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

The device for detecting the air tightness of the corrugated pipe comprises a placing table 1 and a tubular member 2, wherein the upper end face of the placing table 1 is provided with a placing through hole 4 for fixing the corrugated pipe 3, and the placing through hole 4 penetrates through the placing table 1; the inside of the tubular part 2 is provided with a sealed detection cavity 5, the tubular part 2 is buckled on the placing table 1 and is fixedly sealed, and the sealed detection cavity 5 correspondingly contains the corrugated pipe 3; the upper part of the sealed detection cavity 5 is provided with a vacuum pumping hole 6 communicated with a pumping device; an air cylinder 7 is arranged below the placing table 1, the lower part of the corrugated pipe 3 penetrates through the placing through hole 4 to be in transmission connection with the air cylinder 7, and the air cylinder 7 drives the corrugated pipe 3 to open and close.

The utility model discloses a work flow as follows: the lower end of the corrugated pipe 3 is inserted into the placing through hole 4 and is bolted and fixed through a bolt. The through-hole 4 is placed in a sealed state during operation. The lower end of the corrugated pipe 3 is in transmission connection with the air cylinder 7. The tubular member 2 is buckled on the placing table 1 and is fixedly sealed, so that the corrugated pipe 3 is correspondingly positioned in the sealed detection cavity 5. The interface of the air cylinder 7 is connected with an air pipe, and the expansion state of the corrugated pipe 3 in the sealed detection cavity 5 is controlled by the air cylinder. The vacuum pumping hole 6 of the tubular member 2 is connected with a pumping device for pumping. The air extractor extracts the air in the sealed detection cavity 5 and keeps the sealed detection cavity 5 in a vacuum state. Bellows 3 is then tested for gas tightness using a test gas, such as helium. The test gas is driven into the bellows 3 from the lower end of the bellows 3. The air extractor is a gas leak detector, and can judge whether the corrugated pipe 3 is damaged or not and has the phenomenon of air leakage by measuring and detecting gas. Gas leak detectors are prior art.

The utility model discloses compare traditional detection device, be provided with the cylinder 7 that drives bellows 3 and carry out concertina movement below placing platform 1 of bellows 3 to can test the sealing performance of bellows 3 under the different flexible state comparatively conveniently.

A sealing gasket 8 is arranged between the placing table 1 and the tubular element 2, and the sealing gasket 8 can be arranged on the upper end surface of the placing table 1 or the lower end surface of the tubular element 2, such as the embodiment shown in fig. 2. The upper end surface of the placing table 1 is provided with a plurality of oblique clamping grooves 9, the lower end surface of the tubular part 2 is correspondingly provided with a plurality of oblique clamping blocks 10, the width of each oblique clamping groove 9 is larger than that of each oblique clamping block 10, and each oblique clamping block 10 can move correspondingly in the corresponding oblique clamping groove 9. One end of the upper end surface of the placing table 1 is provided with a push plate device 11, and the surface of the push plate device 11 is pressed against one side of the lower part of the tubular part 2. The tubular member 2 is buckled on the placing table 1, the inclined clamping block 10 is correspondingly positioned in the inclined clamping groove 9, then the operator pushes the push plate device 11, and the push plate device 11 pushes the inclined clamping block 10 and the inclined clamping groove 9 to be clamped with each other. Thereby fixing the tubular member 2 on the placing table 1. The direction of motion of push pedal device 11 is relative place the up end of platform 1 and down the angle slope for push pedal device 11 still can exert decurrent effort for tubular member 2 when promoting tubular member 2 and remove along the up end of placing platform 1, promotes tubular member 2 and places platform 1 and compresses tightly each other, and cooperation seal ring 8 improves sealed effect. Compared with the traditional fastening method using bolts, the push plate device 11 has simpler operation steps.

A bolt through hole 12 and a push plate inclined plane 13 are arranged on one side of the placing table 1, and the push plate inclined plane 13 is inclined downwards at an angle relative to the upper end surface of the placing table 1; the push plate device 11 is composed of a sliding push plate 14 and a rotating bolt 15, the rotating bolt 15 is in bolted fit with the bolt through hole 12, the tail end of the rotating bolt 15 is rotatably connected with the sliding push plate 14, and the rotating bolt 15 rotates and pushes the sliding push plate 14 to slide along the push plate inclined surface 13. One embodiment of the push plate device 11 deploys and defines the specific structure of the push plate device 11.

The surface of the sliding push plate 14 is in a convex arc shape, and the surface of the sliding push plate is covered with a soft elastic layer; the matching contact surface 16 of the tubular part 2 and the sliding push plate 14 is in a concave arc shape; the arcuate radius of the mating contact surface 16 is greater than the arcuate radius of the sliding push plate 14. In general, since the sliding angle of the sliding push plate 14 and the sliding angle of the tubular member 2 along the upper end surface of the placing table 1 do not coincide with each other, the sliding push plate 14 and the mating contact surface 16 are in point contact with each other, and the mating effect is poor. The arc-shaped arrangement of the sliding push plate 14 and the matching contact surface 16 and the arrangement of the soft elastic layer can change the point contact between the sliding push plate 14 and the matching contact surface 16 into surface contact, and the matching effect is good.

The inclined fixture block 10 consists of an extension block 17, an inclined plane block 18 and an elastic block 19; the extension block 17 is L-shaped and comprises a vertical plate part 20 and a horizontal plate part 21 which are integrally arranged, wherein the vertical plate part 20 is fixedly connected to the lower end surface of the tubular part 2; one end of the inclined plane block 18 is rotatably arranged on the transverse plate part 21, and the other end of the inclined plane block 18 is connected with the transverse plate part 21 through an elastic block 19; an inclined clamping piece 22 is arranged in the inclined clamping groove 9, a lower inclined surface 23 of the inclined clamping piece 22 is correspondingly matched with an upper inclined surface 24 of the inclined surface block 18, and the inclination angle of the lower inclined surface 23 to the vertical direction is larger than that of the upper inclined surface 24 to the vertical direction. The inclination of the upper inclined surface 24 refers to the inclination of the upper inclined surface 24 of the inclined surface block 18 when the elastic block 19 is not elastically deformed, due to the presence of the elastic block 19. As shown in fig. 6, under the action of the push plate device 11, the lower inclined surface 23 of the inclined position-limiting member 22 and the upper inclined surface 24 of the inclined surface block 18 are relatively displaced, and due to the different inclined angles of the lower inclined surface 23 and the upper inclined surface 24, during the relative movement, the inclined position-limiting member 22 will press the elastic block 19 downwards, and further drive the tubular member 2 and the placing table 1 to be pressed against each other through the extending block 17, thereby improving the sealing effect.

The internal cross-section of the sealed detection chamber 5 is elliptical. With the shape looks adaptation of bellows 3, make things convenient for bellows 3 to carry out the contraction and extension motion, leave the space for tubular member 2 and place the relative displacement that needs carry out between the platform 1 simultaneously

The binding surfaces of the tubular part 2 and the placing table 1 are obliquely arranged. Compared with the horizontal plane, the inclined plane can enable the placing table 1 to have a larger space for operation, and meanwhile, the internal condition of the cavity of the sealed detection cavity 5 is easy to observe.

The above description is only a preferred embodiment of the present invention, and it should be noted that: for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be considered as the protection scope of the present invention.

Claims (7)

1. The utility model provides a bellows gas tightness detection device which characterized in that: the corrugated pipe fixing device comprises a placing table (1) and a tubular piece (2), wherein a placing through hole (4) for fixing a corrugated pipe (3) is formed in the upper end face of the placing table (1); the inside of the tubular piece (2) is provided with a sealed detection cavity (5), the tubular piece (2) is buckled on the placing table (1) and is fixedly sealed, and the sealed detection cavity (5) correspondingly accommodates the corrugated pipe (3); the upper part of the sealed detection cavity (5) is provided with a vacuum pumping hole (6) communicated with a pumping device; an air cylinder (7) is arranged below the placing table (1), the lower portion of the corrugated pipe (3) penetrates through the placing through hole (4) to be in transmission connection with the air cylinder (7), and the air cylinder (7) drives the corrugated pipe (3) to open and close.

2. The airtightness detection apparatus for corrugated tube according to claim 1, wherein: a sealing gasket (8) is arranged between the placing table (1) and the tubular part (2); a plurality of oblique clamping grooves (9) are formed in the upper end face of the placing table (1), and a plurality of oblique clamping blocks (10) are correspondingly arranged on the lower end face of the tubular part (2); a push plate device (11) is arranged at one end of the upper end face of the placing table (1), the plate face of the push plate device (11) is pressed against one side of the lower portion of the tubular part (2), and the oblique clamping block (10) and the oblique clamping groove (9) are pushed to be clamped with each other; the motion direction of the push plate device (11) is inclined downwards at an angle relative to the upper end surface of the placing table (1).

3. The airtightness detection apparatus for corrugated tube according to claim 2, wherein: a bolt through hole (12) and a push plate inclined plane (13) are arranged on one side of the placing table (1), and the push plate inclined plane (13) is inclined downwards at an angle relative to the upper end surface of the placing table (1); the push plate device (11) is composed of a sliding push plate (14) and a rotating bolt (15), the rotating bolt (15) is in bolted fit with the bolt through hole (12), the tail end of the rotating bolt (15) is rotatably connected with the sliding push plate (14), and the rotating bolt (15) rotates and pushes the sliding push plate (14) to slide along the push plate inclined surface (13).

4. The airtightness detection apparatus for corrugated tube according to claim 3, wherein: the surface of the sliding push plate (14) is in a convex arc shape, and the surface of the sliding push plate is covered with a soft elastic layer; the matching contact surface (16) of the tubular part (2) and the sliding push plate (14) is in an inwards concave arc shape; the arc radius of the matching contact surface (16) is larger than that of the sliding push plate (14).

5. The airtightness detection apparatus for corrugated tube according to claim 2, wherein: the inclined fixture block (10) consists of an extension block (17), an inclined plane block (18) and an elastic block (19); the extension block (17) is L-shaped and comprises a vertical plate part (20) and a transverse plate part (21) which are integrally arranged, and the vertical plate part (20) is fixedly connected to the lower end face of the tubular part (2); one end of the inclined plane block (18) is rotatably arranged on the transverse plate part (21), and the other end of the inclined plane block (18) is connected with the transverse plate part (21) through an elastic block (19); an inclined clamping piece (22) is arranged in the inclined clamping groove (9), a lower inclined surface (23) of the inclined clamping piece (22) is correspondingly matched with an upper inclined surface (24) of the inclined surface block (18), and the inclination angle of the lower inclined surface (23) and the vertical direction is larger than that of the upper inclined surface (24) and the vertical direction.

6. The airtightness detection apparatus for corrugated tube according to claim 2, wherein: the internal cross section of the sealed detection cavity (5) is oval.

7. The airtightness detection apparatus for corrugated tube according to claim 1, wherein: the binding surfaces of the tubular piece (2) and the placing table (1) are obliquely arranged.

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