Alarm sealing performance detection tool clamp

Abstract

The utility model discloses a tool clamp for detecting the sealing performance of an alarm, which comprises a base, a supporting block is arranged on the base corresponding to the supporting surface on the upper side, the supporting block is provided with a groove body for accommodating the alarm, the bottom of the groove body is provided with an air hole, the bottom of the supporting block is provided with an air pressure sensor, the upper side of the base is provided with a door frame, and a cross beam is fixedly provided with a driving device. The driving devices are in one-to-one correspondence with the supporting blocks, and inflation covers are installed at the lower ends of the driving devices and communicate with inflation pipes. During detection, the driving device operates, the inflation cover is moved downwards and aligned with the air inlet hole in the upper side of the alarm, and inflation is conducted to improve the air pressure. In the detection process, all the driving devices operate at the same time, when the inflation cover makes contact with the alarm, the alarm is pressed firstly to be clamped and fixed, then inflation is conducted, the stability of the alarm located in the groove body correspondingly is improved, and the problem that the position of the alarm deviates in the inflation process is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of airtightness detection equipment, and particularly relates to a jig for detecting the airtightness of an alarm. Background Technique

[0002] Differential pressure method airtightness detection is a detection method that calculates the leakage rate by measuring the change in pressure inside a container using the gas flow formula. Due to leakage in a closed container, the mass of the gas inside the container will inevitably decrease, resulting in a reduction in the original pressure inside the container. Therefore, the actual amount of leaked gas from the container can be calculated by measuring the decrease in gas pressure inside the container; the working cycle of differential pressure method airtightness detection includes 4 processes, namely the inflation process, the equilibrium process, the detection process, and the exhaust process.

[0003] An alarm is an electronic product that uses forms such as sound, light, and air pressure to remind or warn us to take certain actions to prevent or avoid the consequences caused by a certain event. With the progress of technology, mechanical alarms are increasingly being replaced by advanced electronic alarms and are often used in fields such as system failures, security prevention, transportation, medical rescue, emergency disaster relief, and induction detection. Before leaving the factory, the alarm needs to undergo an airtightness detection test to ensure its airtightness. Content of the Utility Model

[0004] The purpose of the utility model is to provide a jig for detecting the airtightness of an alarm, mainly solving the problems of easy air leakage and low detection efficiency during the airtightness detection process of the existing alarm due to inaccurate positioning.

[0005] To solve the above technical problems, the utility model is realized through the following technical solutions:

[0006] A jig for detecting the airtightness of an alarm, including a base. A support block is installed on the upper support surface corresponding to the base. The support block is provided with a groove for accommodating the alarm. An air hole is opened at the bottom of the groove. A pressure sensor is installed at the bottom of the support block, corresponding to the position of the air hole;

[0007] A gantry is installed on the upper side of the base. The gantry includes support rods on both sides and a cross beam on the upper side. A driving device is fixed on the cross beam. The driving devices are in one-to-one correspondence with the support blocks. An inflation cover is installed at the lower end of the driving device, and the inflation cover is communicated with an inflation pipe.

[0008] Further, the driving device is a cylinder assembly. The cylinder assembly is provided with an air flow valve at the corresponding end. The lower side of the cylinder assembly is fixed to the cross beam, and an inflation hood is installed at the lower side output end of the cylinder assembly. The inflation hood is of a bell-shaped shell structure, and its side wall is provided with an air inlet connecting conduit for connecting an inflation tube, and the upper arc top position is fixed to the output end of the cylinder assembly.

[0009] The opening side of the inflation hood is annular, and an annular groove is provided on the side of the opening for installing an annular rubber ring.

[0010] Further, it includes a hood located above the base. The hood is sleeved outside the gantry and fixed to the base. A visual notch is provided at the front end of the hood, and a strip-shaped groove for the inflation tube to move up and down is provided at the rear side. A pneumatic balance meter is also installed at the rear side of the hood, and the inflation tubes are all connected to the pneumatic balance meter.

[0011] The utility model has the following beneficial effects: During detection, the driving device operates to move the inflation hood downward and align it with the air inlet hole on the upper side of the alarm, and then inflates to increase the air pressure. During the detection process, each driving device operates simultaneously. When the inflation hood contacts the alarm, it first presses the alarm to clamp and fix the alarm, and then inflates to improve the stability of the alarm located in the groove body, avoiding the problem of the alarm shifting in position during the inflation process. Description of the Drawings

[0012] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for describing the embodiments will be briefly introduced below.

[0013] Figure 1 : Schematic diagram of the disassembled structure of the support block of the present utility model.

[0014] Figure 2 : Schematic diagram of the installation of the support block and the structure of the hood of the present utility model.

[0015] Figure 3 : Schematic diagram of the cylinder assembly and the inflation hood structure of the present utility model.

[0016] Figure 4 : Schematic diagram of the overall installation structure of the present utility model.

[0017] In the drawings, the list of components represented by each reference numeral is as follows: base 1, support block 2, alarm 3, groove body 21, air hole 22, air pressure sensor 11, support rod 5, cross beam 51, inflation hood 4, cylinder assembly 6, air flow valve 61, annular groove 41, annular rubber ring 42, hood 7, strip-shaped groove 71, pneumatic balance meter 8. Detailed Embodiments

[0018] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0019] As Figures 1-4 shown: A leak tightness detection tooling fixture for an alarm includes a base 1. The base has an upper support platform and a hollow bottom for installing a control circuit. The side wall has an inclined protrusion for installing an operation button. There are also lifting rings on the corresponding two side walls for moving the entire base by hand. The base 1 is provided with support blocks 2 on the corresponding upper support surface. The support blocks are in multiple groups, specifically two, for simultaneously detecting multiple alarms, improving the detection efficiency, and also used for comparative detection. One of the support blocks corresponds to an alarm with qualified air tightness. The control system compares the detection data of the alarm to be detected with the data of the qualified product. If the error is within a reasonable range, it proves that the alarm to be detected is qualified, and the seal qualification of the alarm can be quickly identified, improving the detection efficiency. The support block 2 is provided with a groove 21 for accommodating the alarm 3. The bottom of the groove 21 is provided with an air hole 22. A pressure sensor 11 is installed at the bottom of the support block 2 at a position corresponding to the air hole. The groove wraps the bottom and the circumferential side of the alarm to ensure that no air leakage occurs at the edge of the alarm. The pressure sensor has a pressure inlet hole corresponding to the air hole at the bottom of the groove for sensing pressure changes. Then, the pressure value is converted into an electronic data value for comparison.

[0020] A gantry is installed on the upper side of the base 1. The gantry includes support rods 5 on both sides and a cross beam 51 on the upper side. A driving device is fixed to the cross beam 51. The driving devices correspond to the support blocks 2 one by one. An inflatable cover 4 is installed at the lower end of the driving device. The inflatable cover 4 is communicated with an inflation pipe. The inflation pipe is not specifically shown in the figure. The cross beam is a plate structure and is supported by the support rods at the ends, raising the driving device. During detection, the driving device operates, moving the inflatable cover downward and aligning it with the upper air inlet hole of the alarm for inflation to increase the air pressure. During the detection process, each driving device operates simultaneously. When the inflatable cover contacts the alarm, it first presses the alarm to clamp and fix it, and then inflates to improve the stability of the alarm corresponding to the position in the groove, avoiding the problem of the alarm shifting during the inflation process.

[0021] As Figures 2-3As shown: The driving device is a cylinder assembly 6. The corresponding end of the cylinder assembly 6 is provided with an air flow valve 61. The lower side of the cylinder assembly 6 is fixed to the cross beam 51. An inflation hood 4 is installed at the corresponding lower output end of the cylinder assembly 6. The cross beam has a perforation for the internal drive shaft of the cylinder assembly to pass through. Driven by the cylinder assembly, due to the compressible property of the gas, an elastic pressing alarm can be realized, improving the clamping stability. The inflation hood 4 is of a bell-shaped housing structure, and its side wall is provided with an air inlet connecting conduit for connecting the inflation pipe. The upper arc top position is fixed to the output end of the cylinder assembly 6. When the cylinder assembly drives the inflation hood to move downward, the bottom opening side of the corresponding inflation hood covers the air inlet hole of the alarm, and inflation is carried out through the inflation pipe to increase the air pressure. At the same time, the opening side of the inflation hood is annular and also has the function of pressing and clamping the alarm. The corresponding opening side of the inflation hood 4 is annular, and an annular groove 41 is provided on the side of the corresponding opening edge for installing an annular rubber ring 42. The annular rubber ring contacts and deforms, which can improve the function of the opening side of the inflation hood to abut against and fix the alarm, and at the same time ensure the contact sealing performance.

[0022] As Figure 3 shown: It includes a cover body 7 located on the upper side of the base 1. The cover body 7 is sleeved outside the gantry and fixed to the base 1. A visual notch is provided at the front end of the cover body 7, and a strip-shaped slot 71 for the lifting and moving of the inflation pipe is provided at the rear side. The cover body is used to provide external protection. The notch is used to observe the contact situation between the inflation hood and the alarm, and is also used for disassembling and installing the alarm. The strip-shaped slot at the rear side is used for the movement of the inflation pipe.

[0023] A barometer 8 is also installed at the rear side of the cover body 7. The inflation pipes are all connected to the barometer 8. It is used to ensure that during the inflation process of the inflation pipes, the air pressure rises synchronously and the inflation volume is constant.

[0024] These embodiments are selected and specifically described in this specification to better explain the principle and practical application of the present utility model, so that those skilled in the relevant technical field can well understand and utilize the present utility model.

Claims

1. An alarm sealing detection fixture, characterized by: The device comprises a base (1), a support block (2) being mounted on the base (1) corresponding to the upper support surface, the support block (2) being provided with a groove (21) for accommodating an alarm (3), an air hole (22) being disposed at the bottom of the groove (21), and an air pressure sensor (11) being mounted at the bottom of the support block (2), the air pressure sensor (11) being located at a position corresponding to the air hole; A door frame is installed on the upper side of the base (1), and the door frame includes support rods (5) on both sides and a crossbeam (51) on the upper side. A driving device is fixed to the crossbeam (51), and the driving device corresponds to the supporting block (2) one by one. An inflation hood (4) is installed at the lower end of the driving device, and the inflation hood (4) is connected to an inflation pipe.

2. According to claim 1, the alarm sealing detection fixture is characterized by: The driving device is a cylinder assembly (6), the corresponding end of the cylinder assembly (6) is provided with an air flow valve (61), the lower side of the cylinder assembly (6) is fixed to the crossbeam (51), and the corresponding lower output end of the cylinder assembly (6) is provided with an inflatable hood (4).

3. According to claim 2, the alarm sealing detection fixture is characterized by: The inflation hood (4) is a bell-shaped housing structure, the side wall of which is provided with an air intake connection duct for connecting to an inflation pipe, and the top arc position of the upper end is fixed to the output end of the cylinder assembly (6).

4. According to claim 3, the alarm sealing detection fixture is characterized by: The corresponding opening side of the inflation cover (4) is annular, and an annular groove (41) is provided on the corresponding opening side for mounting an annular rubber ring (42).

5. According to claim 1, the alarm sealing detection fixture is characterized by: The cover body (7) comprises a cover body (7) located on the upper side of the base (1), the cover body (7) being sleeved on the outside of the door frame and fixed to the base (1), the front end of the cover body (7) being provided with a visible notch, and the rear side being provided with a strip groove (71) for the inflation tube to move up and down.

6. The alarm sealing detection fixture according to claim 5, characterized in that: An air pressure balance instrument (8) is also installed on the rear side of the cover body (7), and the inflation tubes are all connected to the air pressure balance instrument (8).

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