Vacuum box type evacuator for helium detection

Abstract

The utility model discloses a vacuum box type evacuator for helium detection, and relates to the technical field of evacuators. The device comprises a detection device, the top end of the detection device is provided with a fixed pipe, the top end of the fixed pipe is fixedly connected with a connecting pipe, two sealing covers are sleeved between the fixed pipe and the outer side of the connecting section of the connecting pipe, and the two sealing covers are connected in a hinged mode. When gas leaks from a connecting end piece of a fixed pipe and a connecting pipe, gas enters the fixed pipe through a piston cylinder, so that the air pressure in the piston cylinder is reduced, a piston plate is pushed to move upwards along the interior of the piston cylinder under the action of atmospheric pressure, and meanwhile, a mounting plate and a top contact rod are driven to move upwards; and when the top feeler lever moves to be in contact with the light touch switch, the light touch switch is triggered to give an alarm, and the audible and visual alarm is used for sending out a photoelectric signal to remind a worker to carry out maintenance, so that potential safety hazards caused by leakage in the detection process are avoided.

Description

Technical Field

[0001] This utility model relates to the field of evacuation device technology, specifically to an evacuation device for vacuum chamber type helium gas detection. Background Technology

[0002] In the field of vacuum chamber helium detection, the evacuation device is a key component, and its performance and stability directly affect the accuracy and reliability of the detection results. The main function of the evacuation device is to extract the gas from the vacuum chamber before detection to create a low-pressure environment, thereby facilitating the subsequent use of helium as a tracer gas for leak detection.

[0003] However, in practical applications, the pipe connection end of the evacuation device often becomes a potential source of leakage. This defect may seriously affect the smooth progress of the detection process and the accuracy of the detection results. Moreover, the leakage may be small and often occurs in a hard-to-detect location. Therefore, these leaks may not be detected for a long time, thus posing potential safety hazards to the detection process. In order to solve the above problems, the inventors have proposed a vacuum box-type evacuation device for helium detection. Utility Model Content

[0004] To address the issue of airtightness testing at the pipe connection end of a vacuum chamber-type helium gas detection device, the purpose of this invention is to provide a vacuum chamber-type helium gas detection device.

[0005] To solve the above technical problems, the present invention adopts the following technical solution: a vacuum chamber type helium gas detection evacuation device, including a detection device, a fixed tube is provided at the top of the detection device, a connecting tube is fixedly connected to the top of the fixed tube, two sealing covers are sleeved between the outer sides of the connecting section of the fixed tube and the connecting tube, the two sealing covers are hinged together, a detection component is provided on one side of the sealing cover, and the two sealing covers are fixed together by an installation component.

[0006] Preferably, the detection component includes an air intake pipe fixedly connected to one side of the sealing cover. A piston cylinder is fixedly connected to the bottom end of the air intake pipe. A piston plate is slidably engaged inside the piston cylinder. A telescopic rod is fixedly connected to the bottom end of the piston plate. The bottom end of the telescopic rod extends movably to the bottom end of the piston cylinder and is fixedly connected to a mounting plate. A top contact rod is fixedly connected to the top end of the mounting plate away from the telescopic rod. A fixing plate is fixedly connected to one side of the bottom of the piston cylinder. A tactile switch is fixedly connected to the bottom end of the fixing plate. The position of the tactile switch corresponds to that of the top contact rod. An audible and visual alarm is fixedly installed on the top end of the fixing plate. The audible and visual alarm is electrically connected to the tactile switch. A vent is provided on the bottom end of the piston cylinder near the telescopic rod.

[0007] Preferably, the mounting assembly includes two blocks, which are fixedly connected to one side of one of the sealing covers. A rotating block is rotatably connected between the two blocks. A threaded rod is rotatably connected to one side of the rotating block. A snap-fit ​​plate is fixedly connected to one side of the other sealing cover. A snap-fit ​​groove is provided on one side of the snap-fit ​​plate. The threaded rod is movably disposed in the snap-fit ​​groove. A knob is threadedly connected to the outer side of one end of the snap-fit ​​groove.

[0008] Preferably, a sealing groove is provided between the contact surfaces of the two sealing covers and the connecting pipe, and a sealing gasket is provided inside each sealing groove, the sealing gasket being in contact with the connecting pipe.

[0009] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0010] 1. When a gas leak occurs at the connection end of the fixed pipe and the connecting pipe, the gas enters the interior of the fixed pipe through the piston cylinder, causing the gas pressure inside the piston cylinder to decrease. Under the action of atmospheric pressure, the piston plate is pushed to move upward along the interior of the piston cylinder, which in turn moves the mounting plate and the top contact rod upward. When the top contact rod moves to contact the tactile switch, it triggers the tactile switch to sound an alarm. The audible and visual alarm emits a photoelectric signal to remind the staff to carry out maintenance, so as to avoid the potential safety hazards brought by the leak to the detection process.

[0011] 2. By fitting the sealing cover between the outer sides of the connecting pipe and the fixed pipe connection end, then snapping the threaded rod into the inside of the slot, and tightening the knob to make the knob tightly abut against the side of the snap plate away from the block, the sealing cover is installed on the outer side of the connection end of the fixed pipe and the connecting pipe. Installation and disassembly are convenient and quick. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0014] Figure 2 This is a partial structural diagram of the present invention.

[0015] Figure 3 This utility model Figure 2 Enlarged view of point A in the middle.

[0016] Figure 4 This is a partial cross-sectional view of the present invention.

[0017] Figure 5 This is a schematic diagram of the internal structure of the sealing cover in this utility model.

[0018] In the diagram: 1. Detection equipment; 2. Fixed pipe; 3. Connecting pipe; 4. Sealing cover; 5. Detection assembly; 51. Air inlet pipe; 52. Piston cylinder; 53. Piston plate; 54. Telescopic rod; 55. Mounting plate; 56. Top contact rod; 57. Tactile switch; 58. Fixed plate; 59. Audible and visual alarm; 6. Mounting assembly; 61. Block; 62. Rotating block; 63. Threaded rod; 64. Snap-fit ​​plate; 65. Snap-fit ​​groove; 66. Knob; 7. Sealing groove; 8. Sealing gasket; 9. Vent. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Example: Figure 1-5 As shown, this utility model provides a vacuum chamber type helium gas detection evacuation device, including a detection device 1. A fixed tube 2 is provided at the top of the detection device 1. A connecting tube 3 is fixedly connected to the top of the fixed tube 2. Two sealing covers 4 are sleeved between the outer sides of the connecting section of the fixed tube 2 and the connecting tube 3. The two sealing covers 4 are hinged together. A detection component 5 is provided on one side of the sealing cover 4. The two sealing covers 4 are fixed together by an installation component 6.

[0021] The detection component 5 includes an air inlet pipe 51, which is fixedly connected to one side of the sealing cover 4. A piston cylinder 52 is fixedly connected to the bottom end of the air inlet pipe 51. A piston plate 53 is slidably engaged inside the piston cylinder 52. A telescopic rod 54 is fixedly connected to the bottom end of the piston plate 53. The bottom end of the telescopic rod 54 extends movably to the bottom end of the piston cylinder 52 and is fixedly connected to a mounting plate 55. A top contact rod 56 is fixedly connected to the top end of the mounting plate 55 away from the telescopic rod 54. A fixing plate 58 is fixedly connected to the bottom side of the piston cylinder 52. A tactile switch 57 is fixedly connected to the bottom end of the fixing plate 58. The position of the tactile switch 57 corresponds to that of the top contact rod 56.

[0022] By adopting the above technical solution, a vacuum is drawn using the detection equipment 1. When a gas leak occurs between the connection end of the fixed pipe 2 and the connecting pipe 3, the gas pressure inside the piston cylinder 52 is greater than the gas pressure inside the fixed pipe 2. The gas enters the interior of the fixed pipe 2 through the piston cylinder 52, causing the gas pressure inside the piston cylinder 52 to decrease. Under the action of atmospheric pressure, the piston plate 53 is pushed upward along the interior of the piston cylinder 52, which in turn drives the mounting plate 55 and the top contact rod 56 to move upward. When the top contact rod 56 moves to contact the tactile switch 57, the tactile switch 57 is triggered to sound an alarm, thereby reminding the staff to carry out maintenance.

[0023] The mounting assembly 6 includes two blocks 61, which are fixedly connected to one side of one of the sealing covers 4. A rotating block 62 is rotatably connected between the two blocks 61. A threaded rod 63 is rotatably connected to one side of the rotating block 62. A snap-fit ​​plate 64 is fixedly connected to one side of the other sealing cover 4. A snap-fit ​​groove 65 is provided on one side of the snap-fit ​​plate 64. The threaded rod 63 is movably disposed in the snap-fit ​​groove 65. A knob 66 ​​is threadedly connected to the outer side of one end of the snap-fit ​​groove 65.

[0024] By adopting the above technical solution, when installing the sealing cover 4, the sealing cover 4 is fitted between the outer sides of the connecting end of the connecting pipe 3 and the fixed pipe 2, and then the threaded rod 63 is snapped into the inside of the slot 65. By tightening the knob 66, the knob 66 ​​is made to come into close contact with the side of the snap plate 64 away from the block 61, thereby installing the sealing cover 4 on the outer side of the connecting end of the fixed pipe 2 and the connecting pipe 3.

[0025] A sealing groove 7 is provided between the contact surfaces of the two sealing covers 4 and the connecting pipe 3. A sealing gasket 8 is provided inside the sealing groove 7, and the sealing gasket 8 fits into the connecting pipe 3.

[0026] By adopting the above technical solution and by setting the connecting pipe 3, it is easier to enhance the sealing performance between the sealing cover 4 and the contact surfaces of the connecting pipe 3 and the fixed pipe 2.

[0027] An audible and visual alarm 59 is fixedly installed on the top of the mounting plate 58, and the audible and visual alarm 59 is electrically connected to the tactile switch 57.

[0028] By adopting the above technical solution and setting up an audible and visual alarm 59, it is convenient to send photoelectric signals to remind staff.

[0029] A vent hole 9 is provided at the bottom end of the piston cylinder 52 on the side near the telescopic rod 54.

[0030] By adopting the above technical solution and setting the vent hole 9, it is easy to maintain the balance between the internal air pressure of the piston cylinder 52 and the external air pressure.

[0031] Working principle: When using the vacuum chamber helium equipment to evacuate, the sealing cover 4 is placed between the outer sides of the connecting pipe 3 and the fixed pipe 2, and then the threaded rod 63 is snapped into the inside of the slot 65. By tightening the knob 66, the knob 66 ​​is made to come into close contact with the side of the snap plate 64 away from the block 61, thereby installing the sealing cover 4 on the outer side of the connecting pipe 3 and the fixed pipe 2.

[0032] When a gas leak occurs at the connection end of the fixed pipe 2 and the connecting pipe 3, the gas pressure inside the piston cylinder 52 is greater than the gas pressure inside the fixed pipe 2. The gas enters the interior of the fixed pipe 2 through the piston cylinder 52, causing the gas pressure inside the piston cylinder 52 to decrease. Under the action of atmospheric pressure, the piston plate 53 is pushed to move upward along the interior of the piston cylinder 52. At the same time, the mounting plate 55 and the top contact rod 56 are moved upward. When the top contact rod 56 moves to contact the tactile switch 57, the tactile switch 57 is triggered to sound an alarm. The audible and visual alarm 59 emits a photoelectric signal to remind the staff to carry out maintenance.

[0033] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A vacuum chamber-type helium gas detection evacuation device, comprising a detection device (1), characterized in that: The top of the detection device (1) is provided with a fixed tube (2), and a connecting tube (3) is fixedly connected to the top of the fixed tube (2). Two sealing covers (4) are sleeved between the outer side of the connecting section of the fixed tube (2) and the connecting tube (3). The two sealing covers (4) are hinged together. A detection component (5) is provided on one side of the sealing cover (4). The two sealing covers (4) are fixed together by an installation component (6).

2. The vacuum chamber-type helium gas detection evacuation device as described in claim 1, characterized in that, The detection component (5) includes an air inlet pipe (51), which is fixedly connected to one side of the sealing cover (4). A piston cylinder (52) is fixedly connected to the bottom end of the air inlet pipe (51). A piston plate (53) is slidably engaged inside the piston cylinder (52). A telescopic rod (54) is fixedly connected to the bottom end of the piston plate (53). The bottom end of the telescopic rod (54) extends movably to the bottom end of the piston cylinder (52) and is fixedly connected to a mounting plate (55). A top contact rod (56) is fixedly connected to the top end of the mounting plate (55) away from the telescopic rod (54). A fixing plate (58) is fixedly connected to the bottom end of the piston cylinder (52). A tactile switch (57) is fixedly connected to the bottom end of the fixing plate (58). The position of the tactile switch (57) corresponds to that of the top contact rod (56).

3. The vacuum chamber-type helium gas detection evacuation device as described in claim 1, characterized in that, The mounting assembly (6) includes two blocks (61), which are fixedly connected to one side of one of the sealing covers (4). A rotating block (62) is rotatably connected between the two blocks (61). A threaded rod (63) is rotatably connected to one side of the rotating block (62). A snap-fit ​​plate (64) is fixedly connected to one side of the other sealing cover (4). A snap-fit ​​groove (65) is provided on one side of the snap-fit ​​plate (64). The threaded rod (63) is movably disposed in the snap-fit ​​groove (65). A knob (66) is threadedly connected to the outer side of one end of the snap-fit ​​groove (65).

4. The vacuum chamber-type helium gas detection evacuation device as described in claim 1, characterized in that, A sealing groove (7) is provided between the contact surfaces of the two sealing covers (4) and the connecting pipe (3), and a sealing gasket (8) is provided inside the sealing groove (7), and the sealing gasket (8) is in contact with the connecting pipe (3).

5. The vacuum chamber-type helium gas detection evacuation device as described in claim 2, characterized in that, An audible and visual alarm (59) is fixedly installed on the top of the fixed plate (58), and the audible and visual alarm (59) is electrically connected to a tactile switch (57).

6. The vacuum chamber-type helium gas detection evacuation device as described in claim 2, characterized in that, A vent hole (9) is provided at the bottom end of the piston cylinder (52) on the side near the telescopic rod (54).

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