Auxiliary device for air tightness test

Abstract

According to the auxiliary device for the air tightness test, the pressing rod and the extrusion plate connected through the connecting strip are arranged to press the joint of the air supply pipe and the air tightness detector as well as the joint of the air supply pipe and the tank body, the triangular plates are arranged, and the distance between the triangular plates is controlled by the wedge blocks, so that the pressing rod can slide in the open groove; the one-way buckle fixedly connected to the pressing rod can be clamped or loosened by the triangular plate so as to achieve locking. The air supply pipe and the pressure measuring pipe are supported and fixed through the sliding rails, the sliding blocks and the claws on the sliding blocks, the two sliding rails are hinged and can be folded, and a handle is arranged for carrying. By the adoption of the technical scheme, firmness of the connecting position is effectively improved, the device can adapt to air supply pipes of different sizes, the shaking amplitude of the air supply pipes and the pressure measuring pipe in the testing process is effectively reduced, stability of the connecting position is further improved, and the bearing mechanism used for reducing the size of the air supply pipes and the pressure measuring pipe is convenient to carry.

Description

Technical Field

[0001] The utility model relates to the field of airtightness detection equipment, in particular to an auxiliary device for airtightness testing. Background Technique

[0002] Airtightness detection is one of the quality inspection links in the production process of many products. For products with high airtightness requirements such as pressure pipelines, fire extinguishers, and medical pipelines, the complete sealing performance determines the effectiveness and safety during use. And large tanks, exterior windows, etc. also need to be tested for airtightness.

[0003] When using an airtightness detector to detect the airtightness of large tanks and exterior windows, etc., it is necessary to connect the air supply pipe to the object to be detected and the airtightness detector. At the same time, it is also necessary to insert the pressure measuring pipe into the interfaces of the airtightness detector and the object to be detected. However, when detecting large tanks and exterior windows, etc., due to the relatively thick diameter of the air supply pipe, it is easy to shake. It is required that the connection of the air supply pipe can be both sealed and resist a certain amount of shaking.

[0004] Currently, the method of pasting tape at the interface is mostly used. It is inconvenient to operate both during installation and disassembly.

[0005] The Chinese utility model patent with the application number CN202122890963.1 discloses a vacuum pumping device for a double-layer vehicle liquefied natural gas bottle. Its structure includes a frame body, a vacuum pumping part, and a tank body. The vacuum pumping part is composed of a mounting seat, a device main body, fixing bolts, a connecting pipe, a joint, and a card slot. And the mounting seat is installed on the frame body; the mounting seat is fixedly connected to the frame body through four fixing bolts, and the mounting seat is of a concave structure, and the left end face and the right end face of the inner wall of the mounting seat are in contact with the left end face and the right end face of the frame body respectively. It realizes the convenient connection of the connecting pipe and the joint, but when the detection diameters of the objects to be detected are different, this scheme cannot be adapted. Content of the Utility Model

[0006] The purpose of the utility model is to propose an auxiliary device for airtightness testing aiming at the deficiencies in the above-mentioned technologies, aiming to solve the problem that when detecting the airtightness of outdoor or large tanks, the connection is unstable due to the shaking of the air supply pipe and the pressure measuring pipe, which affects the airtightness detection.

[0007] The utility model provides an auxiliary device for airtightness testing, which includes an airtightness detector, a tank body, an air supply pipe and a pressure measuring pipe. Both ends of the air supply pipe and the pressure measuring pipe are movably connected to the airtightness detector and the tank body. A pressing mechanism for pressing the connection is arranged at the connection of the air supply pipe with the airtightness detector and the tank body; the pressing mechanism passes through a fixing ring, and a locking mechanism for fixing and unlocking the pressing mechanism is arranged on the fixing ring; a supporting mechanism for supporting the air supply pipe and the pressure measuring pipe is further included to keep the air supply pipe and the pressure measuring pipe stable. The supporting mechanism is movably connected to the air supply pipe and the pressure measuring pipe, and the supporting mechanism is foldable.

[0008] Preferably, the pressing mechanism includes a pressing rod, one-way buckles, a pressing plate and a connecting strip. The one-way buckles are arranged at equal intervals along the length direction of the pressing rod, and the one-way buckles are fixedly connected to the pressing rod. One end of the connecting strip is fixedly connected to the side of the pressing rod close to the air supply pipe, and the other end of the connecting strip is fixedly connected to the pressing plate.

[0009] Preferably, the cross section of the one-way buckle is trapezoidal, and the short side of the trapezoidal cross section of the one-way buckle is close to the pressing plate side. Each pressing rod is connected with two connecting strips, and the distance between the two connecting strips close to the pressing rod side is smaller than the distance between the two connecting strips close to the pressing plate. By arranging the one-way buckles, the one-way buckles on the pressing rod extrude towards the air supply pipe side, driving the pressing plate to press the connection tightly, effectively improving the sealing performance of the connection, and being able to adapt to air supply pipes of different sizes.

[0010] Preferably, the locking mechanism includes a triangular plate, a slot, a wedge block, an edge plate, a first telescopic rod and a first spring. The slot is opened on the fixing ring. One side of the triangular plate is elastically hinged to the side of the fixing ring close to the pressing plate, and the triangular plate is located at the edge of the slot. The edge plate is fixedly connected to the side of the wedge block away from the air supply pipe. One end of the first telescopic rod is fixedly connected to the edge plate, and the other end of the first telescopic rod is fixedly connected to the fixing ring. The first spring is sleeved outside the first telescopic rod, and the wedge block slides in the slot.

[0011] Preferably, the supporting mechanism includes a supporting plate, two slide rails, sliders, second telescopic rods, claw clips, second springs, a rotating shaft and fixing blocks. Both ends of each slide rail are respectively fixedly connected with the supporting plate. Each slide rail is slidably connected with a slider. One end of the second telescopic rod is fixedly connected to the slider, and the other end of the second telescopic rod is fixedly connected to the fixing block. The rotating shaft is rotatably connected to the fixing block, and the rotating shaft is fixedly connected to the claw clip. One end of the second spring is fixedly connected to the side of the second telescopic rod away from the slide rail, and the other end of the second spring is fixedly connected to the claw clip. By arranging the claw clips to fix the air supply pipe and the pressure measuring pipe, the stability of the air supply pipe and the pressure measuring pipe during use is improved, especially the stability during outdoor use, and the firmness of the connection is further improved.

[0012] Preferably, two adjacent slide rails are hinged by two adjacent support plates, and the hinge is located at the edge of the two adjacent support plates. A handle is fixedly connected to one of the support plates near the hinge. One of the two adjacent support plates is fixedly connected with a clamping block, and the other support plate is provided with a clamping groove. The clamping block and the clamping groove are buckled and in interference fit. By setting the handle and hinging the two adjacent support plates, it is convenient to carry.

[0013] Compared with the prior art, it has the following beneficial effects:

[0014] The utility model provides an auxiliary device for airtightness testing. By setting a pressing rod and a pressing plate connected by a connecting strip, the connection between the air supply pipe and the airtight detector and the tank body is tightened. And by setting a triangular plate, the distance between the triangular plates is controlled by a wedge block, so that the pressing rod can slide in the slot, and a one-way buckle fixedly connected to the pressing rod can be clamped or loosened by the triangular plate to achieve locking; by setting only slide rails, sliders and claw clips on the sliders, the air supply pipe and the pressure measuring pipe are supported and fixed. And the two slide rails are hinged and foldable, and a handle is provided for easy carrying. By adopting the above technical scheme, the firmness of the connection is effectively improved, and the air supply pipe of different sizes can be adapted. The amplitude of the shaking of the air supply pipe and the pressure measuring pipe during the test is effectively reduced, the stability of the connection is further improved, and the supporting mechanism for the air supply pipe and the pressure measuring pipe is convenient to carry. Description of the Drawings

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only the preferred embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0016] Figure 1 It is a schematic diagram of an auxiliary device for airtightness testing of the present invention;

[0017] Figure 2 It is a schematic diagram of an auxiliary device for airtightness testing of the present invention;

[0018] Figure 3 It is a schematic diagram of the pressing mechanism of the present invention;

[0019] Figure 4 It is a partially enlarged schematic diagram A of the present invention;

[0020] Figure 5 It is a schematic diagram of the supporting mechanism of the present invention;

[0021] Figure 6 It is a partially enlarged schematic diagram B of the present invention;

[0022] Figure 7 Schematic diagram of the clamping block and clamping groove of the present utility model;

[0023] Figure 8 Schematic diagram of the slide rail and support plate of the present utility model.

[0024] In the figure, airtight detector - 1; air supply pipe - 11; pressure measuring pipe - 12; tank body - 2; pressing mechanism - 3; pressing rod - 31; one - way buckle - 32; extrusion plate - 33; connecting strip - 34; fixing ring - 4; locking mechanism - 5; triangular plate - 51; slotted opening - 52; wedge block - 53; edge plate - 54; first telescopic rod - 55; first spring - 56; supporting mechanism - 6; support plate - 61; clamping block - 611; clamping groove - 612; slide rail - 62; slider - 63; second telescopic rod - 64; claw clip - 65; second spring - 66; rotating shaft - 67; fixing block - 68; handle - 69. Specific embodiments

[0025] In order to more easily understand the structure of the present utility model and the functional features and advantages that can be achieved, the following will describe the preferred embodiments of the present utility model in detail in conjunction with the drawings as follows:

[0026] Embodiment:

[0027] As Figures 1 to 3 shown, the present utility model provides an auxiliary device for airtightness testing, including an airtight detector 1, a tank body 2, an air supply pipe 11 and a pressure measuring pipe 12. Both ends of the air supply pipe 11 and the pressure measuring pipe 12 are movably connected to the airtight detector 1 and the tank body 2. Air is sent into the tank body 2 by the pump of the airtight detector 1, and the pressure in the tank body 2 is measured by the pressure measuring pipe 12 to detect the airtightness of the tank body 2. Usually, the pressure measuring pipe 12 has a separate pipe orifice. If there is no separate pipe orifice, the pressure measuring pipe 12 and the air supply pipe 11 are connected using tape, etc., and seals such as sealing rings or tape are used at the connection with the tank body 2. The objects to be measured in this scenario include not only the tank body 2 but also outdoor facilities and the airtightness testing of windows, etc. A pressing mechanism 3 for pressing the connection is provided at the connection between the air supply pipe 11 and the airtight detector 1 and the tank body 2.

[0028] The pressing mechanism 3 includes a pressing rod 31, a one - way buckle 32, an extrusion plate 33 and a connecting strip 34. The one - way buckles 32 are arranged at equal intervals along the length direction of the pressing rod 31, and the one - way buckles 32 are fixedly connected to the pressing rod 31. One end of the connecting strip 34 is fixedly connected to the side of the pressing rod 31 close to the air supply pipe 11, and the other end of the connecting strip 34 is fixedly connected to the extrusion plate 33. The pressing rod 31 and the one - way buckles 32 are made of metal or hard plastic. The connecting strip 34 is a plastic or metal strip with certain toughness, and the pressing plate is made of rubber, having relatively high toughness and bending ability.

[0029] The cross-section of the one-way buckle 32 is trapezoidal, and the short side of the trapezoidal cross-section of the one-way buckle 32 is close to the extrusion plate 33 side. That is, it is convenient for the pressing rod 31 to move towards the air duct 11 side. Each pressing rod 31 is connected to two connecting strips 34, and the distance between the two connecting strips 34 on the side close to the pressing rod 31 is smaller than the distance between the two connecting strips 34 on the side close to the extrusion plate 33. That is, the two connecting strips 34 are arranged in a V shape. When pressing the pressing rod 31, the pressing rod 31 pushes the connecting strips 34 and presses the extrusion plate 33. Since the air duct 11 is generally circular, during the pressing process, due to the V-shaped arrangement of the connecting strips 34, when pressing, the end of the connecting strip 34 close to the extrusion plate 33 will expand outwards and generate an inward clamping force, so that the extrusion plate 33 can closely adhere to the connection between the air duct 11 and the tank body 2 or between the air duct 11 and the airtight detector 1.

[0030] As another embodiment, as Figure 3 and Figure 4 shown, the pressing mechanism 3 of the present application passes through the fixing ring 4, and the fixing ring 4 is provided with a locking mechanism 5 for fixing and unlocking the pressing mechanism 3. The locking mechanism 5 includes a triangular plate 51, a slot 52, a wedge 53, an edge plate 54, a first telescopic rod 55 and a first spring 56. The slot 52 is opened on the fixing ring 4. One side of the triangular plate 51 is elastically hinged to the side of the fixing ring 4 close to the extrusion plate 33, and the triangular plate 51 is located at the edge of the slot 52. The edge plate 54 is fixedly connected to the side of the wedge 53 away from the air duct 11. One end of the first telescopic rod 55 is fixedly connected to the edge plate 54, and the other end of the first telescopic rod 55 is fixedly connected to the fixing ring 4. The first spring 56 is sleeved outside the first telescopic rod 55, and the wedge 53 slides in the slot 52.

[0031] The slot 52 is square, and each side of the slot 52 is hinged with a triangular plate 51, that is, multiple triangular plates 51 are provided. In order to enable the triangular plate 51 to recover in time after being squeezed by the wedge 53, a torsion spring is provided at the hinge between the triangular plate 51 and the slot 52, that is, an elastic hinge. And the corner of the triangular plate 51 away from the slot 52 is biased towards the pressing rod 31 side. When in use, the pressing rod 31 is pressed, and the one-way buckle 32 on the pressing rod 31 continuously expands the triangular plate 51 and moves towards the connection between the air duct 11 and the tank body 2 or the airtight detector 1 until the extrusion plate 33 presses the connection tightly. Since the cross-section of the one-way buckle 32 is trapezoidal and its short side is close to the air duct 11, when moving the pressing rod 31 towards the side away from the air duct 11, the buckle of the triangular plate 51 cannot move. After the detection is completed, the wedge 53 is pressed into the slot 52, and the wedge 53 expands the distance between the triangular plates 51, so that the pressing plate can slide towards the side away from the air duct 11 between the triangular plates 51 to achieve unlocking. The first telescopic rod 55 and the first spring 56 enable the wedge 53 to reset. The middle of the wedge 53 is a through hollow, and the pressing tube passes through the wedge 53.

[0032] As another embodiment, as Figures 5 to 8 shown, the present application further includes a supporting mechanism 6 for receiving the air supply pipe 11 and the pressure measuring pipe 12, so as to keep the air supply pipe 11 and the pressure measuring pipe 12 stable. The supporting mechanism 6 is movably connected to the air supply pipe 11 and the pressure measuring pipe 12, and the supporting mechanism 6 is foldable. The supporting mechanism 6 includes a support plate 61, two slide rails 62, sliders 63, second telescopic rods 64, claw clips 65, second springs 66, a rotating shaft 67 and a fixing block 68. Both ends of each slide rail 62 are fixedly connected to the support plate 61 respectively. Each slide rail 62 is slidably connected with a slider 63. One end of the second telescopic rod 64 is fixedly connected to the slider 63, and the other end of the second telescopic rod 64 is fixedly connected to the fixing block 68. The rotating shaft 67 is rotatably connected to the fixing block 68, and the rotating shaft 67 is fixedly connected to the claw clip 65. One end of the second spring 66 is fixedly connected to the side of the second telescopic rod 64 away from the slide rail 62, and the other end of the second spring 66 is fixedly connected to the claw clip 65. When in use, the slider 63 moves on the slide rail 62, driving the claw clip 65 to move along the slide rail 62. After the claw clip 65 is opened, the air supply pipe 11 and the pressure measuring pipe 12 are placed in the claw clip 65 and clamped by the claw clip 65. When the air supply pipe 11 and the pressure measuring pipe 12 are at a relatively high height, the second telescopic rod 64 is extended. The second telescopic rod 64 is composed of a thick rod and a thin rod sleeved with each other. The thin rod is elastically connected with a convex block. A plurality of openings are equidistantly arranged on the thick rod. When the convex block is in the opening, it is locked and the second telescopic rod 64 cannot be telescoped. When the convex block is not in the opening, the second telescopic rod 64 can be telescoped.

[0033] Adjacent two slide rails 62 are hinged through adjacent two support plates 61, and the hinged part is located at the edge of adjacent two support plates 61. To realize the connection between the two slide rails 62, the hinge is convenient for carrying. A handle 69 is fixedly connected to one of the support plates 61 close to the hinged part. For adjacent two support plates 61, one of the support plates 61 is fixedly connected with a clamping block 611, and the other support plate 61 is provided with a clamping groove 612. The clamping block 611 is buckled with the clamping groove 612 and has an interference fit. After use, the two slide rails 62 are folded along the hinged part, and the clamping block 611 is buckled in the clamping groove 612 to realize locking, which is convenient for carrying.

[0034] The fixing ring 4, the pressing rod 31, the pressing plate 33, etc. can also be sleeved on the second telescopic rod 64 during the carrying process, which is convenient for carrying.

[0035] Working principle of an auxiliary device for airtightness testing in this application: During use, the pressing rod 31 is pressed. The one-way buckle 32 on the pressing rod 31 continuously spreads the triangular plate 51 and moves towards the connection between the air supply pipe 11 and the tank body 2 or the airtight detector 1 until the pressing plate 33 presses the connection tightly. Since the cross-section of the one-way buckle 32 is trapezoidal and its short side is close to the side of the air supply pipe 11, when the pressing rod 31 is moved towards the side away from the air supply pipe 11, the buckle of the triangular plate 51 cannot move. After the detection is completed, the wedge block 53 is pressed into the slotted opening 52, and the wedge block 53 spreads the distance between the triangular plates 51 so that the pressing plate can slide towards the side away from the air supply pipe 11 between the triangular plates 51 to achieve unlocking. The first telescopic rod 55 and the first spring 56 enable the wedge block 53 to reset. The middle part of the wedge block 53 is a through hollow, and the pressing pipe passes through the wedge block 53. In addition, during use, the slider 63 moves on the slide rail 62, driving the claw clip 65 to move along the slide rail 62. After the claw clip 65 is spread, the air supply pipe 11 and the pressure measuring pipe 12 are placed in the claw clip 65 and clamped by the claw clip 65. After use, the two slide rails 62 are folded along the hinge, and the locking block 611 is buckled in the card slot 612 to achieve locking, which is convenient for carrying. The fixing ring 4, the pressing rod 31, the pressing plate 33, etc. can also be sleeved on the second telescopic rod 64 during the carrying process, which is convenient for carrying.

[0036] The above is only the preferred embodiment of the present utility model, and does not impose any form of limitation on the present utility model. Any person skilled in the art can make many possible changes and modifications to the technical solution of the present utility model, or modify it into an equivalent embodiment with equivalent changes, without departing from the scope of the technical solution of the present utility model. Therefore, all changes, modifications, equivalent changes and modifications made to the above embodiments based on the technology of the present utility model without departing from the content of the technical solution of the present utility model shall fall within the protection scope of this technical solution.

Claims

1. An auxiliary device for air tightness testing, comprising an air tightness testing machine (1), a tank body (2), an air supply pipe (11) and a pressure measuring pipe (12), wherein both ends of the air supply pipe (11) and the pressure measuring pipe (12) are movably connected to the air tightness testing machine (1) and the tank body (2), characterized in that A pressing mechanism (3) for pressing the connection between the air supply pipe (11), the airtightness detection machine (1) and the tank body (2) is provided; the pressing mechanism (3) passes through a fixing ring (4), and the fixing ring (4) is provided with a locking mechanism (5) for fixing and unlocking the pressing mechanism (3); and a supporting mechanism (6) for receiving the air supply pipe (11) and the pressure measuring tube (12) so as to keep the air supply pipe (11) and the pressure measuring tube (12) stable, the supporting mechanism (6) being movably connected to the air supply pipe (11) and the pressure measuring tube (12), and the supporting mechanism (6) being foldable.

2. The auxiliary device for air tightness testing according to claim 1, characterized in that: The pressing mechanism (3) comprises a pressing rod (31), a one-way buckle (32), an extrusion plate (33) and a connecting strip (34); the one-way buckles (32) are arranged at equal intervals along the length direction of the pressing rod (31), and the one-way buckles (32) are fixedly connected to the pressing rod (31); one end of the connecting strip (34) is fixedly connected to a side of the pressing rod (31) close to the air supply pipe (11), and the other end of the connecting strip (34) is fixedly connected to the extrusion plate (33).

3. The auxiliary device for airtightness testing according to claim 2, characterized in that: The cross section of the one-way buckle (32) is trapezoidal, and the short side of the trapezoidal cross section of the one-way buckle (32) is close to the side of the extrusion plate (33).

4. The auxiliary device for air tightness testing according to claim 2, characterized in that: Each of the pressing rods (31) is connected to two of the connecting strips (34), and the distance between the two connecting strips (34) close to one side of the pressing rod (31) is smaller than the distance between the two connecting strips (34) close to the extrusion plate (33).

5. The auxiliary device for air tightness testing according to claim 2, characterized in that: The locking mechanism (5) comprises a triangular plate (51), a slot (52), a wedge block (53), an edge plate (54), a first telescopic rod (55) and a first spring (56); the slot (52) is formed on the fixing ring (4); one side of the triangular plate (51) is elastically hinged to a side of the fixing ring (4) close to the extrusion plate (33); the triangular plate (51) is located at the edge of the slot (52); the edge plate (54) is fixedly connected to a side of the wedge block (53) away from the air supply pipe (11); one end of the first telescopic rod (55) is fixedly connected to the edge plate (54); the other end of the first telescopic rod (55) is fixedly connected to the fixing ring (4); the first spring (56) is sleeved outside the first telescopic rod (55); and the wedge block (53) slides in the slot (52).

6. The auxiliary device for airtightness testing according to claim 1, characterized in that: The supporting mechanism (6) comprises a supporting plate (61), two slide rails (62), a slider (63), a second telescopic rod (64), a claw clamp (65), a second spring (66), a rotating shaft (67) and a fixed block (68), wherein both ends of each slide rail (62) are respectively fixedly connected to the supporting plate (61), each slide rail (62) is slidably connected to the slider (63), one end of the second telescopic rod (64) is fixedly connected to the slider (63), the other end of the second telescopic rod (64) is fixedly connected to the fixed block (68), the rotating shaft (67) is rotatably connected to the fixed block (68), the rotating shaft (67) is fixedly connected to the claw clamp (65), one end of the second spring (66) is fixedly connected to a side of the second telescopic rod (64) away from the slide rail (62), and the other end of the second spring (66) is fixedly connected to the claw clamp (65).

7. The auxiliary device for airtightness testing according to claim 6, characterized in that: Two adjacent slide rails (62) are hingedly connected via two adjacent support plates (61), and the hinged portion is located at the edges of the two adjacent support plates (61).

8. The auxiliary device for airtightness testing according to claim 7, characterized in that: A handle (69) is fixedly connected to one of the support plates (61) near the hinge.

9. The auxiliary device for airtightness testing according to claim 8, characterized in that: Two adjacent support plates (61), one of the support plates (61) is fixedly connected with a clamping block (611), and the other support plate (61) is provided with a clamping slot (612), and the clamping block (611) and the clamping slot (612) are buckled and interference fit.

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