Gas cylinder airtightness detection device

Abstract

The utility model provides a gas cylinder airtightness detection device. The gas cylinder airtightness detection device comprises a sealing part and a vacuum part. The sealing component comprises a sealing cabin and a plugging mechanism, the sealing cabin comprises a cabin body provided with a placing opening and a cabin door connected to the placing opening, and the plugging mechanism is used for driving the cabin door to seal the placing opening so as to form a sealed accommodating cavity; the vacuum component comprises a vacuum pump used for carrying out air exhaust action on the containing cavity. The whole gas cylinder is wrapped by the sealed cabin, and all leakage points of the gas cylinder are covered; meanwhile, the containing cavity is vacuumized through the vacuum component, background noise in the production environment is eliminated, the detection sensitivity of the gas sensor is guaranteed, the periphery of the gas cylinder is vacuumized, the pressure difference between the interior and the exterior of the cylinder is further increased, and gas tightness detection is conducted on the gas cylinder through the pressure rising value in the containing cavity.

Description

Technical Field

[0001] The utility model relates to the technical field of detection equipment, and more specifically, to an air tightness detection device for gas cylinders. Background Art

[0002] When a liquefied petroleum gas cylinder (or a gas cylinder of a similar type for filling various gases) leaks, in the light case, the effective fuel will be dissipated and wasted, failing to reach the predetermined service life; in the serious case, it will cause an explosion, resulting in serious losses of personnel and property. The reasons for the leakage of liquefied petroleum gas cylinders generally include the following situations: 1. Defects in the bottle body material itself, such as sand holes and cracks. 2. Poor workmanship during the manufacturing process, such as welding defects. 3. Poor valve sealing. 4. Damage and leakage caused by external forces during use. 5. Fatigue or other losses occur during cyclic use, gradually resulting in poor sealing.

[0003] The existing technologies for air tightness detection of gas cylinders (such as the air tightness detection methods mentioned in GBT 5842-2022 Liquefied Petroleum Gas Cylinders and GBT12137-2002 Test Method for Air Tightness of Gas Cylinders) are mainly the coating and bubble-watching method, and there are also self-developed gas sensor detection methods in the industry.

[0004] The coating and bubble-watching method is fully manual operation, with low efficiency, high labor intensity, low detection accuracy and poor reliability. The gas sensor scanning method can basically only detect large leaks in the valve part, and it is difficult to achieve reliable automatic detection of the bottle body part. Due to the relatively large background noise of the gas content in the production environment, this method is often troubled by false alarms and it is difficult to achieve high-precision automatic detection.

[0005] The existing technical methods are difficult to achieve full-automatic detection in the production process, and it is difficult to reliably detect small leaks in gas cylinders in terms of detection effect. Especially in the production environment where recycled gas cylinders are filled, the number of gas cylinders filled with gas is huge. The potential danger is that there are small leaks in the gas cylinders that cannot be detected by manual inspection, but due to the large number of gas cylinders, the potential danger caused by cumulative leakage is huge. Summary of the Utility Model

[0006] Based on this, in order to solve the problem of low detection efficiency of the existing air tightness detection method for gas cylinders, the utility model provides an air tightness detection device for gas cylinders, and its specific technical solution is as follows:

[0007] An air tightness detection device for gas cylinders includes a sealing component and a vacuum component; the sealing component includes a sealing chamber and a plugging mechanism, the sealing chamber includes a chamber body provided with a placement opening and a chamber door connected to the placement opening, and the plugging mechanism is used to drive the chamber door to close the placement opening, thereby forming a sealed accommodation cavity; the vacuum component includes a vacuum pump for evacuating the accommodation cavity.

[0008] The above-mentioned gas cylinder air tightness detection device wraps the entire gas cylinder with a sealed cabin to cover all leakage points of the gas cylinder; at the same time, a vacuum component is used to evacuate the containing chamber to eliminate background noise in the production environment, so that the detection sensitivity of the gas sensor is guaranteed. Because the periphery of the gas cylinder is evacuated, the pressure difference inside and outside the bottle is further increased, and the gas cylinder is tested for air tightness using the pressure recovery value in the containing chamber.

[0009] Furthermore, the sealed cabin is provided with an air extraction port, and the vacuum component further comprises an air extraction pipeline connecting the vacuum pump and the air extraction port, and a stop valve arranged on the air extraction pipeline.

[0010] Furthermore, the sealing mechanism includes a driving cylinder; the cabin body is a circular barrel placed vertically or horizontally, and the cabin door is a circular barrel cover; the cabin door is hinged at the placement opening of the cabin body, and the driving cylinder drives the circular barrel cover to seal or open the placement opening of the circular barrel.

[0011] Furthermore, it also includes a sealing ring arranged on the side of the drum cover close to the drum, and a deformation cavity is provided in the sealing ring.

[0012] Furthermore, the sealing component also includes a locking unit; the locking unit includes a fixing seat arranged on the top of the circular barrel, a fastener hinged on the fixing seat, and a top interface arranged at the bottom of the circular barrel cover, the fastener is provided with a connecting portion and a top pressing portion adapted to the top interface, the connecting portion is hingedly connected to the fixing seat; the fastener includes a hinged rod and a sleeve cap, one end of the hinged rod is hingedly connected to the fixing seat, and the other end of the hinged rod is threadedly connected to the sleeve cap.

[0013] Furthermore, it also includes a material moving component, which includes a driving assembly and a clamping unit; the clamping unit is used to clamp or release the gas cylinder; the driving assembly is used to drive the clamping unit to place the gas cylinder into the accommodating cavity or move the gas cylinder out of the accommodating cavity.

[0014] Further, the drive assembly includes a first drive unit and a second drive unit, the first drive unit includes a first mounting seat, a first drive motor arranged on the first mounting seat, a first drive screw driven by the first drive motor, and a first screw seat transmission connected to the first drive screw, and the clamping unit is arranged on the first screw seat; the second drive unit includes a second mounting seat, a second drive motor arranged on the second mounting seat, a second drive screw driven by the second drive motor, and a second screw seat transmission connected to the second drive screw, and the first mounting seat is arranged on the second screw seat.

[0015] Further, the clamping unit includes a clamping seat, a driving cylinder disposed on the clamping seat, a moving seat disposed at the output end of the driving cylinder, and three clamping claws spaced apart on the clamping seat; the clamping claw is provided with a hinged portion hinged to the clamping seat, a sliding notch slidably connected to the moving seat, and a clamping portion.

[0016] Further, the first driving lead screw and the second driving lead screw are perpendicularly arranged.

[0017] Further, the clamping claw is provided with a hollow groove. Description of the Drawings

[0018] The present utility model can be further understood from the following description in conjunction with the drawings. The components in the drawings are not necessarily drawn to scale, but the emphasis is placed on showing the principles of the embodiments. In different views, the same reference numerals designate corresponding parts.

[0019] Figure 1 is a schematic structural view of the gas cylinder airtightness detection device according to an embodiment of the present utility model Figure 1 ;

[0020] Figure 2 is a schematic structural view of the sealing component according to an embodiment of the present utility model;

[0021] Figure 3 is a schematic structural view of the gas cylinder airtightness detection device according to an embodiment of the present utility model Figure 2 ;

[0022] Figure 4 is a schematic structural view of the material transfer component according to an embodiment of the present utility model;

[0023] Figure 5 is a schematic structural view of the clamping unit according to an embodiment of the present utility model.

[0024] Description of the Reference Numerals:

[0025] 1, sealing component; 2, vacuum component; 3, locking unit; 4, material transfer component;

[0026] 11, sealing chamber; 12, plugging mechanism; 13, driving cylinder;

[0027] 111, cabin body; 112, cabin door;

[0028] 21, vacuum pump; 22, air extraction pipeline; 23, stop valve;

[0029] 31, fixed seat; 32, fastener; 33, top interface;

[0030] 41. Driving component; 42. First driving unit; 43. Second driving unit; 44. Clamping unit;

[0031] 421. First mounting seat; 422. First driving motor; 423. First driving lead screw; 424. First lead screw seat;

[0032] 431. Second mounting seat; 432. Second driving motor; 433. Second driving lead screw; 434. Second lead screw seat;

[0033] 441. Clamping seat; 442. Driving cylinder; 443. Moving seat; 444. Clamping jaw. Detailed implementation manners

[0034] In order to make the purpose, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below in conjunction with its embodiments. It should be understood that the specific implementation manners described herein are only used to explain the present utility model and do not limit the protection scope of the present utility model.

[0035] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation manner.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present utility model belongs. The terms used herein in the specification of the present utility model are only for the purpose of describing specific implementation manners and are not intended to limit the present utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0037] In the present utility model, the so-called "first" and "second" do not represent specific quantities and orders, but are only used for name distinction.

[0038] Such as Figure 1 And Figure 2As shown in the figure, a gas cylinder airtightness detection device in an embodiment of the present utility model includes a sealing component 1 and a vacuum component 2; the sealing component 1 includes a sealing chamber 11 and a plugging mechanism 12, the sealing chamber 11 includes a chamber body 111 provided with a placement opening and a chamber door 112 connected to the placement opening, and the plugging mechanism 12 is used to drive the chamber door 112 to close the placement opening, thereby forming a sealed accommodation cavity; the vacuum component 2 includes a vacuum pump 21 for performing a pumping action on the accommodation cavity.

[0039] For the above gas cylinder airtightness detection device, the entire gas cylinder is wrapped by the sealing chamber 11 to cover all leakage points of the gas cylinder; at the same time, the vacuum component 2 is used to perform a vacuum pumping process on the accommodation cavity to eliminate background noise in the production environment, ensuring the detection sensitivity of the gas sensor. Since the periphery of the gas cylinder is evacuated, the pressure difference inside and outside the bottle is further increased, and the airtightness of the gas cylinder is detected by using the pressure rise value in the accommodation cavity.

[0040] In one embodiment, the sealing chamber 11 is provided with an air extraction port, and the vacuum component 2 further includes an air extraction pipeline 22 connecting the vacuum pump 21 and the air extraction port, and a stop valve 23 provided on the air extraction pipeline 22. In this way, the gas cylinder is evacuated by the vacuum pump 21. When the air pressure in the sealing chamber reaches a preset value during the vacuum pumping, the control component is used to control the stop valve 23 to control the stop of the pumping action.

[0041] In one embodiment, the plugging mechanism 12 includes a driving cylinder 13; the chamber body 111 is a vertically or horizontally placed circular barrel, and the chamber door 112 is a circular barrel cover; the chamber door 112 is hinged at the placement opening of the chamber body 111, and the driving cylinder 13 drives the circular barrel cover to perform a closing action or an opening action on the placement opening of the circular barrel. In this way, the driving cylinder 13 is used to drive the circular barrel cover to perform a closing action or an opening action on the opening of the circular barrel, which is convenient for realizing the automation of the airtightness detection of the gas cylinder.

[0042] In one embodiment, it further includes a sealing ring provided on the side of the circular barrel cover close to the circular barrel, and a deformation cavity is provided inside the sealing ring. In this way, when the circular barrel cover presses the circular barrel, the deformation of the deformation cavity of the sealing ring is used to improve the sealing performance and further improve the sealing of the sealing chamber.

[0043] In one embodiment, the sealing component 1 further includes a locking unit 3; the locking unit 3 includes a fixing seat 31 arranged at the top of the circular barrel, a fastener 32 hinged on the fixing seat 31, and a top interface 33 arranged at the bottom of the circular barrel cover, the fastener 32 is provided with a connecting portion and a pressing portion adapted to the top interface 33, the connecting portion is hingedly connected to the fixing seat 31; the fastener 32 includes a hinged rod and a cap, one end of the hinged rod is hingedly connected to the fixing seat 31, and the other end of the hinged rod is threadedly connected to the cap. In this way, when the driving cylinder 13 drives the circular barrel cover to seal the opening of the circular barrel, the hinged rod is clamped to the top interface 33, and the cap is rotated to press the cap into the top interface 33, thereby enhancing the sealing effect.

[0044] like Figure 1 and Figure 4 As shown, in one embodiment, it further includes a material moving component 4, which includes a driving component 41 and a clamping unit 44; the clamping unit 44 is used to clamp or release the gas cylinder; the driving component 41 is used to drive the clamping unit 44, so as to place the gas cylinder into the accommodating cavity or move the gas cylinder out of the accommodating cavity. In this way, the driving component 41 drives the clamping unit 44, so as to place the gas cylinder into the accommodating cavity or move the gas cylinder out of the accommodating cavity.

[0045] like Figure 3 and Figure 4 As shown, in one embodiment, the driving assembly 41 includes a first driving unit 42 and a second driving unit 43, the first driving unit 42 includes a first mounting seat 421, a first driving motor 422 arranged on the first mounting seat 421, a first driving screw 423 driven by the first driving motor 422, and a first screw seat 424 connected to the first driving screw 423, and the clamping unit 44 is arranged on the first screw seat 424; the second driving unit 43 includes a second mounting seat 431, a second driving motor 432 arranged on the second mounting seat 431, a second driving screw 433 driven by the second driving motor 432, and a second screw seat 434 connected to the second driving screw 433, and the first mounting seat 421 is arranged on the second screw seat 434. In this way, the motor drives the screw to rotate, driving the screw seat to move, so as to realize the movement of the clamping unit 44 in two dimensional directions.

[0046] like Figure 5As shown, in one embodiment, the clamping unit 44 includes a clamping seat 441, a driving cylinder 442 disposed on the clamping seat 441, a moving seat 443 disposed at the output end of the driving cylinder 442, and three clamping claws 444 spaced apart on the clamping seat 441; the clamping claws 444 are provided with a hinged portion hinged to the clamping seat 441, a sliding notch slidably connected to the moving seat 443, and a clamping portion. In this way, by driving the moving seat 443 to move through the driving cylinder 442, the three clamping claws 444 are opened and closed, so as to complete the clamping action of the three clamping claws 444 on the gas cylinder, and further realize the clamping of the top of the gas cylinder by the clamping unit 44.

[0047] In one embodiment, the first driving lead screw 423 and the second driving lead screw 433 are vertically arranged. In this way, the clamping unit 44 is realized to move in the vertical Z direction and the horizontal Y direction.

[0048] In one embodiment, the clamping claw 444 is provided with a hollowed-out groove. In this way, through the hollowed-out groove, the structural weight of the clamping claw 444 can be greatly reduced, and at the same time, the structural strength of the clamping claw 444 can be ensured.

[0049] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0050] The above-described embodiments only represent several implementation manners of the present invention. The description is relatively specific and detailed, but it cannot be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the utility model patent shall be subject to the appended claims.

Claims

1. A gas cylinder air tightness detection device, characterized in that: It comprises a sealing component (1) and a vacuum component (2); The sealing component (1) comprises a sealing cabin (11) and a blocking mechanism (12); the sealing cabin (11) comprises a cabin body (111) provided with a placement opening and a cabin door (112) connected to the placement opening; the blocking mechanism (12) is used to drive the cabin door (112) to close the placement opening, thereby forming a sealed accommodating cavity; The vacuum component (2) comprises a vacuum pump (21) for evacuating the accommodating chamber.

2. A gas cylinder air tightness detection device according to claim 1, characterized in that: The sealed cabin (11) is provided with an air extraction port, and the vacuum component (2) further comprises an air extraction pipeline (22) connecting the vacuum pump (21) and the air extraction port, and a stop valve (23) arranged on the air extraction pipeline (22).

3. A gas cylinder air tightness detection device according to claim 1, characterized in that: The blocking mechanism (12) comprises a driving cylinder (13); The cabin body (111) is a circular barrel placed vertically or horizontally, and the cabin door (112) is a circular barrel cover; The hatch (112) is hinged at the placement opening of the cabin body (111), and the drive cylinder (13) drives the drum cover to seal or open the placement opening of the drum.

4. A gas cylinder air tightness detection device according to claim 3, characterized in that: It also includes a sealing ring arranged on one side of the drum cover close to the drum, and a deformation cavity is arranged in the sealing ring.

5. A gas cylinder air tightness detection device according to claim 3, characterized in that: The sealing component (1) further comprises a locking unit (3); The locking unit (3) comprises a fixing seat (31) arranged on the top of the circular barrel, a fastener (32) hinged on the fixing seat (31), and a top interface (33) arranged on the bottom of the circular barrel cover, wherein the fastener (32) is provided with a connecting portion and a pressing portion adapted to the top interface (33), and the connecting portion is hingedly connected to the fixing seat (31); The fastener (32) comprises a hinged rod and a cap, one end of the hinged rod is hingedly connected to the fixing seat (31), and the other end of the hinged rod is threadedly connected to the cap.

6. A gas cylinder air tightness detection device according to claim 1, characterized in that: It also includes a material moving component (4), wherein the material moving component (4) includes a driving component (41) and a clamping unit (44); The clamping unit (44) is used to clamp or release the gas cylinder; The driving assembly (41) is used to drive the clamping unit (44) so ​​as to place the gas cylinder into the accommodating cavity or remove the gas cylinder from the accommodating cavity.

7. A gas cylinder air tightness detection device according to claim 6, characterized in that: The driving assembly (41) comprises a first driving unit (42) and a second driving unit (43); the first driving unit (42) comprises a first mounting seat (421), a first driving motor (422) arranged on the first mounting seat (421), a first driving screw rod (423) driven by the first driving motor (422), and a first screw rod seat (424) drivingly connected to the first driving screw rod (423); and the clamping unit (44) is arranged on the first screw rod seat (424); The second drive unit (43) comprises a second mounting seat (431), a second drive motor (432) arranged on the second mounting seat (431), a second drive screw (433) driven by the second drive motor (432), and a second screw seat (434) drivingly connected to the second drive screw (433), and the first mounting seat (421) is arranged on the second screw seat (434).

8. A gas cylinder air tightness detection device according to claim 6, characterized in that: The clamping unit (44) comprises a clamping seat (441), a driving cylinder (442) arranged on the clamping seat (441), a moving seat (443) arranged at the output end of the driving cylinder (442), and three clamping claws (444) arranged at intervals on the clamping seat (441); The clamping claw (444) is provided with a hinged portion hinged on the clamping seat (441), a sliding notch slidably connected to the moving seat (443), and a clamping portion.

9. A gas cylinder air tightness detection device according to claim 7, characterized in that: The first driving screw rod (423) and the second driving screw rod (433) are arranged vertically.

10. A gas cylinder air tightness detection device according to claim 8, characterized in that: The clamping claw (444) is provided with a hollow groove.

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