Indirect test method leak detection device

Abstract

The utility model discloses a leak detection device using an indirect test method, comprising a detection bench, two ends of a detection platform of the detection bench are respectively provided with a screw mechanism base plate, two workpiece end supports are arranged between the upper surfaces of the screw mechanism base plates, the workpiece end supports on the two screw mechanism base plates are in left-right correspondence, and the workpiece end supports on the two screw mechanism base plates are in left-right correspondence. The two workpiece end supports which correspond to each other left and right form a detection station, the upper surface of each screw mechanism bottom plate is provided with two workpiece end sealing and pressing heads which are connected in a sliding mode, the two workpiece end sealing and pressing heads correspond to the two workpiece end supports respectively, the upper surface of each screw mechanism bottom plate is provided with two supports, and the two supports are connected with the two workpiece end supports respectively. The indirect test method leak detection equipment is simple in structure and easy and convenient to operate, large leak of a workpiece can be detected through the high-pressure pressure sensor, micro leak of the workpiece can be detected through the Acerba vacuum detection, detection is more comprehensive, and high-efficiency automatic production of the workpiece is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile brake braided tubes, in particular to a leakage detection device using an indirect testing method. Background Art

[0002] Braided brake hoses used in automotive brake systems consist of two tube bodies and a braided tube. The braided tube utilizes a retaining structure, which poses a risk of leakage and requires airtightness testing. The customer required a test pressure greater than 17 MPa. Currently, high-pressure leak detectors are limited on the market, are expensive, and cannot be used for direct testing. Utility Model Content

[0003] The technical problem to be solved by the present invention is to overcome the existing defects and provide a leak detection device using an indirect testing method, which has a simple structure and is easy to operate. It can not only use a high-pressure pressure sensor to detect large leaks in the workpiece, but also use Adekai vacuum detection to detect micro leaks in the workpiece, making the detection more comprehensive and realizing high-efficiency automated production of the workpiece, which can effectively solve the problems in the background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an indirect testing method leak detection device, including a detection table, a screw mechanism base plate is respectively provided at both ends of the detection platform of the detection table, two workpiece end supports are provided between the upper surfaces of each screw mechanism base plate, the workpiece end supports on the two screw mechanism base plates correspond to each other on the left and right, and the two corresponding workpiece end supports on the left and right form a detection station, and the upper surface of each screw mechanism base plate is provided with two slidingly connected workpiece end sealing and pressing heads, the two workpiece end sealing and pressing heads respectively correspond to the two workpiece end supports, and the upper surface of each screw mechanism base plate is provided with two supports, and the two supports are respectively provided with screws for driving the workpiece end sealing and pressing heads to slide, and a workpiece end on each detection station A high-pressure gas group for inflating the interior of the workpiece is connected to the upper sealing and pressing head of the other end of the workpiece, and the high-pressure gas group is arranged at the lower end of the interior of the detection platform, and a pressure sensor assembly for detecting the internal air pressure of the workpiece is connected to the sealing and pressing head of the other end of the workpiece, and the pressure sensor assembly is arranged at the upper end of the detection platform. Two lower sealing seats for supporting and sealing the braided tube of the workpiece are provided on the upper surface of the detection platform of the detection platform. Up and down moving parts are provided on the upper and lower moving parts. Two upper sealing seats corresponding to the lower sealing seats are provided on the upper and lower moving parts. A detection space is formed between the upper sealing seat and the lower sealing seat. The braided tube component of the workpiece is sealed to the detection space by the upper sealing seat and the lower sealing seat. The upper end of the detection platform is provided with a vacuum detection part for monitoring the internal pressure of the detection space composed of the upper sealing seat and the lower sealing seat.

[0005] Furthermore, the up and down moving parts include a U-shaped frame fixed on the detection table, and two telescopic cylinders are fixedly installed on the U-shaped frame. The corresponding upper sealing seat can be driven by the extension of the telescopic cylinder, and the workpiece can be fixed between the lower sealing seats through the upper sealing seat, so as to seal the braided tube component of the workpiece to the detection space between the upper sealing seat and the lower sealing seat. During detection, the detection space between the upper sealing seat and the lower sealing seat can be extracted into a vacuum state through the vacuum detection part, and then the pressure detection part on the vacuum detection part can be used to detect whether the pressure changes. If the pressure rises, it proves that a leakage has occurred. If the pressure does not change, it proves that the workpiece connection is intact.

[0006] Furthermore, one end of the screw is rotatably connected to the sealing and clamping head at the end of the workpiece through a bearing, and the other end of the screw is provided with a rotating handle. The screw can be driven to rotate by rotating the handle, and the movement of the screw when rotating can drive the sealing and clamping head at the end of the workpiece to slide left and right, and the end of the workpiece can be sealed by the sealing and clamping head at the end of the workpiece.

[0007] Furthermore, a sliding groove is provided on the lower surface of the sealing and pressing head at the end of the workpiece, and a sliding track corresponding to the sliding groove of the sealing and pressing head at the end of the workpiece is provided on the upper surface of the bottom plate of the screw mechanism. A channel communicating with the interior of the workpiece is provided on the sealing and pressing head at the end of the workpiece, and the channel on the sealing and pressing head at the end of the workpiece is connected to the pressure sensor assembly and the high-pressure gas group.

[0008] Compared with the prior art, the beneficial effects of the present invention are as follows: first, the workpiece is placed on the upper end of the workpiece end support, and the screw can be driven to rotate by rotating the handle, and the movement of the screw when rotating can drive the sealing and pressing head at the end of the workpiece to slide left and right, and the end of the workpiece can be sealed by the sealing and pressing head at the end of the workpiece. When detecting a large leak, the gas can be extracted into the interior of the workpiece through the high-pressure gas group, so as to increase the air pressure inside the workpiece to 17Mpa, and finally the air pressure inside the workpiece can be detected by the pressure sensor assembly to determine whether the air pressure changes, so as to determine whether the workpiece has a large leak. When performing a micro-leak test, the corresponding upper sealing seat can be driven by extending the telescopic cylinder, and the upper sealing seat can be used to The workpiece is fixed between the lower sealing seats, so that the braided tube component of the workpiece is sealed to the detection space between the upper sealing seat and the lower sealing seat. During the detection, the detection space between the upper sealing seat and the lower sealing seat can be evacuated to a vacuum state through the vacuum detection component, and then the pressure detection component on the vacuum detection component is used to detect whether the pressure changes. If the pressure rises, it proves that a leak has occurred. If the pressure does not change, it proves that the workpiece connection is intact. The indirect testing method leak detection equipment has a simple structure and is easy to operate. It can not only use high-pressure pressure sensors to detect large leaks in the workpiece, but also use Adekai vacuum detection to detect micro leaks in the workpiece, making the detection more comprehensive and realizing efficient and automated production of workpieces. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is a schematic diagram of the structure of the utility model;

[0010] Figure 2 This is a partially enlarged structural diagram of the utility model;

[0011] Figure 3 This is a schematic diagram of the workpiece structure of the utility model.

[0012] In the figure: 1 detection table, 2 screw mechanism base plate, 3 workpiece end support, 4 workpiece end sealing and pressing head, 5 support, 6 screw, 7 high-pressure gas group, 8 pressure sensor assembly, 9 lower sealing seat, 10 upper and lower moving parts, 101 U-shaped frame, 102 telescopic cylinder, 11 upper sealing seat, 12 vacuum detection part. DETAILED DESCRIPTION

[0013] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0014] See also Figure 1-2The utility model provides a technical solution: an indirect testing method leak detection device, including a detection platform 1, a screw mechanism base plate 2 is respectively provided at both ends of the detection platform of the detection platform 1, two workpiece end supports 3 are provided between the upper surfaces of each screw mechanism base plate 2, the workpiece end supports 3 on the two screw mechanism base plates 2 correspond to each other on the left and right, and the two corresponding workpiece end supports 3 on the left and right form a detection station, and the upper surface of each screw mechanism base plate 2 is provided with two slidingly connected workpiece end sealing and pressing heads 4, the two workpiece end sealing and pressing heads 4 respectively correspond to the two workpiece end supports 3, and the upper surface of each screw mechanism base plate 2 is provided with two supports 5, and the two supports 5 are respectively provided with screws 6 that drive the workpiece end sealing and pressing heads 4 to slide. , a workpiece end sealing and pressing head 4 on each inspection station is connected to a high-pressure gas group 7 for inflating the interior of the workpiece, and the high-pressure gas group 7 is arranged at the lower end of the interior of the inspection platform 1, and the other workpiece end sealing and pressing head 4 is connected to a pressure sensor assembly 8 for detecting the internal air pressure of the workpiece, and the pressure sensor assembly 8 is arranged at the upper end of the inspection platform 1, and the upper surface of the inspection platform of the inspection platform 1 is provided with two lower sealing seats 9 for supporting and sealing the braided tube of the workpiece, and the upper surface of the inspection platform of the inspection platform 1 is provided with an up and down moving part 10, and the up and down moving part 10 is provided with two upper sealing seats 11 corresponding to the lower sealing seats 9 one by one, and the upper sealing seat 11 and the lower sealing seat 9 form a detection space, and the upper sealing seat 11 and the lower sealing seat 9 seal the braided tube component of the workpiece to the inspection Space, the upper end of the detection platform 1 is provided with a vacuum detection part 12 for monitoring the internal pressure of the detection space composed of the upper sealing seat 11 and the lower sealing seat 9. The vacuum detection part 12 can use the vacuum sealing detector produced by Adek Testing Technology (Shanghai) Co., Ltd., and the up and down moving parts 10 include a U-shaped frame 101 fixed on the detection platform 1. Two telescopic cylinders 102 are fixedly installed on the U-shaped frame 101. The corresponding upper sealing seat 11 can be driven by the extension of the telescopic cylinder 102. The workpiece can be fixed between the lower sealing seat 9 through the upper sealing seat 11, so that the braided tube component of the workpiece can be sealed to the detection space between the upper sealing seat 11 and the lower sealing seat 9. During the detection, the detection space between the upper sealing seat 11 and the lower sealing seat 9 can be The vacuum state is extracted, and then the pressure detection part on the vacuum detection part 12 is used to detect whether the pressure changes. If the pressure rises, it proves that there is a leakage. If the pressure does not change, it proves that the workpiece connection is intact. One end of the screw 6 is rotatably connected to the workpiece end sealing and pressing head 4 through a bearing, and the other end of the screw 6 is provided with a rotating handle. The screw 6 can be driven to rotate by rotating the handle. The movement of the screw 6 when rotating can drive the workpiece end sealing and pressing head 4 to slide left and right. The workpiece end can be sealed by the workpiece end sealing and pressing head 4. A sliding groove is provided on the lower surface of the workpiece end sealing and pressing head 4, and a sliding track corresponding to the sliding groove of the workpiece end sealing and pressing head 4 is provided on the upper surface of the screw mechanism bottom plate 2.The workpiece end sealing and pressing head 4 is provided with a channel communicating with the interior of the workpiece. This channel is connected to the pressure sensor assembly 8 and the high-pressure gas group 7. This indirect testing method leak detection equipment has a simple structure and is easy to operate. It can not only detect large leaks in the workpiece using the high-pressure pressure sensor, but also use the Adekai vacuum test for micro leaks in the workpiece, making the detection more comprehensive and realizing efficient and automated production of workpieces.

[0015] During use: first place the workpiece on the upper end of the workpiece end support 3, and rotate the handle to drive the screw 6 to rotate. The movement of the screw 6 when rotating can drive the workpiece end sealing and pressing head 4 to slide left and right. The workpiece end sealing and pressing head 4 can be used to seal the workpiece end. When detecting a large leak, the gas can be extracted into the interior of the workpiece through the high-pressure gas group 7 to increase the air pressure inside the workpiece to 17Mpa. Finally, the air pressure inside the workpiece can be detected through the pressure sensor assembly 8 to determine whether the air pressure changes, thereby determining whether the workpiece has a large leak, and performing micro-leak detection. During the inspection, the detection space between the upper sealing seat 11 and the lower sealing seat 9 can be extracted into a vacuum state by the vacuum detection component 12, and then the pressure detection component on the vacuum detection component 12 is used to detect whether the pressure changes. If the pressure rises, it proves that there is a leakage. If the pressure does not change, it proves that the workpiece connection is intact.

[0016] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. An indirect testing method leak detection device, comprising a detection table (1), characterized in that: The detection platform of the detection table (1) is provided with a screw mechanism base plate (2) at both ends, and two workpiece end supports (3) are provided between the upper surfaces of each screw mechanism base plate (2). The workpiece end supports (3) on the two screw mechanism base plates (2) correspond to each other on the left and right, and the two workpiece end supports (3) corresponding to each other on the left and right constitute an inspection station, and the upper surface of each screw mechanism base plate (2) is provided with two slidingly connected workpiece end sealing and pressing heads (4), and the two workpiece end sealing and pressing heads (4) correspond to the two workpiece end supports (3) respectively. The upper surface of each screw mechanism base plate (2) is provided with two supports (5), and the two supports (5) are respectively provided with screws (6) for driving the workpiece end sealing and pressing heads (4) to slide. A workpiece end sealing and pressing head (4) on each inspection station is connected to a high-pressure gas group (7) for inflating the inside of the workpiece. The high-pressure gas group ( 7) is arranged at the lower end of the interior of the detection platform (1), and the other workpiece end sealing and pressing head (4) is connected to a pressure sensor assembly (8) for detecting the internal air pressure of the workpiece, and the pressure sensor assembly (8) is arranged at the upper end of the detection platform (1), and the upper surface of the detection platform of the detection platform (1) is provided with two lower sealing seats (9) for supporting and sealing the braided tube of the workpiece, and the upper surface of the detection platform of the detection platform (1) is provided with an up and down moving member (10), and the up and down moving member (10) is provided with two upper sealing seats (11) corresponding to the lower sealing seats (9) one by one, and a detection space is formed between the upper sealing seat (11) and the lower sealing seat (9), and the braided tube component of the workpiece is sealed to the detection space by the upper sealing seat (11) and the lower sealing seat (9), and the upper end of the detection platform (1) is provided with a vacuum detection member (12) for monitoring the internal pressure of the detection space composed of the upper sealing seat (11) and the lower sealing seat (9).

2. The indirect testing method leak detection device according to claim 1, characterized in that: The up-and-down moving member (10) comprises a U-shaped frame (101) fixed on the detection platform (1), and two telescopic cylinders (102) are fixedly mounted on the U-shaped frame (101).

3. The indirect testing method leak detection device according to claim 1, characterized in that: One end of the screw rod (6) is rotatably connected to the workpiece end sealing and pressing head (4) via a bearing, and the other end of the screw rod (6) is provided with a rotating handle.

4. The indirect testing method leak detection device according to claim 1, characterized in that: The lower surface of the workpiece end sealing and pressing head (4) is provided with a sliding groove, and the upper surface of the screw mechanism base plate (2) is provided with a sliding track corresponding to the sliding groove of the workpiece end sealing and pressing head (4). The workpiece end sealing and pressing head (4) is provided with a channel communicating with the interior of the workpiece, and the channel on the workpiece end sealing and pressing head (4) is connected to the pressure sensor assembly (8) and the high-pressure gas group (7).

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