A plunger-type quick connector

Abstract

This utility model relates to a plunger-type quick connector, belonging to the field of vacuum sensor testing devices. A sealing rubber layer is fixedly connected to the upper part of the inner wall of the pagoda head base. A spring is placed on the inner bottom surface of the pagoda head base. The side of the protruding bottom end of the plunger rubber is slidably connected to the sealing rubber layer, and the bottom surface is pressed against the spring. The pagoda head base is connected to the air passage of the sealing rubber layer through an internal air passage one. The plunger rubber has an internal air passage two and an external air passage three. The advantages are its novel structure, using a rubber plunger to move and seal the vacuum hole to form a sealing structure, convenient operation of the connector structure, good sealing effect, and the ability to automatically turn the vacuum source on and off when replacing the vacuum sensor, improving the efficiency of vacuum sensor leakage detection. It solves the problem of contact stress attenuation and material wear caused by frequent pressing and pulling of the pagoda head during vacuum leakage tests, and reduces operating steps.

Description

Technical Field

[0001] This utility model belongs to the field of vacuum sensor testing devices, specifically a plunger-type quick connector. Background Technology

[0002] Existing vacuum sensors commonly use a pagoda-shaped head (part of the vacuum sensor) directly pressed into an elastic tube (silicone / fluororubber) during vacuum leakage tests. The seal relies on the radial deformation of the elastic tube. Frequent pressing and pulling of the pagoda-shaped head leads to contact stress attenuation and material wear due to material creep. Furthermore, it requires an additional step of opening and closing the vacuum source. While this allows for rapid sensor replacement (average pressing and pulling time 8 seconds per test), after 60 tests, the sealing performance deteriorates due to contact stress attenuation and wear on the inner wall of the elastic tube, significantly increasing the probability of leakage and necessitating elastic tube replacement. Moreover, as the number of tests increases and the testing duration lengthens, the replacement time for the elastic tube decreases. The additional step of opening and closing the vacuum source increases the test time, thus reducing the efficiency of vacuum sensor vacuum leakage testing. Summary of the Invention

[0003] This invention provides a plunger-type quick connector to solve the problems of contact stress attenuation and material wear caused by material creep due to frequent pressing and pulling of the pagoda head during vacuum leakage tests of vacuum sensors, and to reduce the number of operation steps.

[0004] The technical solution adopted by this utility model includes a pagoda head base, a spring, a sealing rubber layer, and a plunger rubber. The sealing rubber layer is fixedly connected to the upper part of the inner wall of the pagoda head base. The spring is placed on the bottom surface of the pagoda head base. The side of the protruding part at the bottom of the plunger rubber is slidably connected to the sealing rubber layer, and the bottom surface is pressed against the spring. The pagoda head base is connected to the air passage of the sealing rubber layer through an internal air passage one. The plunger rubber has an internal air passage two and an external air passage three. Air passage two and air passage three are connected.

[0005] The pagoda head base includes an air passage, a vacuum source connector, a spring cavity, and a base body. The bottom of the base body has a vacuum source connector, and the base body contains an air passage. The bottom of the air passage opens at the bottom of the vacuum source connector and passes through the spring cavity into the wall of the base body.

[0006] The vacuum source connector adopts a pagoda-shaped connector.

[0007] The sealing rubber layer has an upper air passage and a lower air passage inside, which are connected to the air passage inside the pagoda head.

[0008] The plunger rubber is inverted T-shaped, including a bottom protrusion, a cylindrical part, a second air passage, and a third air passage. The cylindrical part is located above the bottom protrusion, the second air passage is located inside the cylindrical part, and the third air passage is located on the outer wall of the cylindrical part. The second and third air passages are connected. The cylindrical part is used to fit inside the pagoda head of the vacuum sensor.

[0009] The protruding part at the bottom of the plunger rubber opens or blocks the air passage of the sealing rubber layer by sliding.

[0010] The air passage of the sealing rubber layer is the upper air passage.

[0011] The advantages of this utility model are its novel structure, which uses a rubber plunger to move and seal the vacuum hole to form a sealed structure. The plug-in structure is easy to operate and has a good sealing effect. When replacing the vacuum sensor, the vacuum source can be automatically turned off and on, which improves the leakage detection efficiency of the vacuum sensor. It solves the problem of contact stress attenuation and material wear caused by material creep due to frequent pressing and pulling of the pagoda head when the vacuum sensor is used for vacuum leakage experiments, and reduces the number of operation steps. After changing the interface design, it can also be applied to other similar fields, and has strong scalability. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 This is a schematic diagram of the vacuum source channel of this utility model in the closed state;

[0014] Figure 3 This is a schematic diagram of the vacuum source channel of this utility model in the open state. Detailed Implementation

[0015] See Figure 1 , 2 3, including a pagoda head 1, a spring 2, a sealing rubber layer 3, and a plunger rubber 4, wherein the sealing rubber layer 3 is fixedly connected to the upper part of the inner wall of the pagoda head 1, the spring 2 is placed on the inner bottom surface of the pagoda head 1, the side of the bottom protrusion 401 of the plunger rubber 4 is slidably connected to the sealing rubber layer 3, and the bottom surface is pressed against the spring 2. The pagoda head 1 is connected to the air passage of the sealing rubber layer 3 through the internal air passage 101. The plunger rubber 4 has an internal air passage 2 403 and an external air passage 3 404, and the air passage 2 403 and the air passage 3 404 are connected.

[0016] The pagoda head base 1 includes an air passage 101, a vacuum source connector 102, a spring cavity 103, and a base 104. The base 104 has a vacuum source connector 102 at its bottom end and an air passage 101 inside the base 104. The bottom of the air passage 101 opens at the bottom of the vacuum source connector 102 and passes through the spring cavity 103 into the wall of the base 104.

[0017] The vacuum source connector 102 adopts a pagoda-shaped connector.

[0018] The sealing rubber layer 3 has an upper air passage 301 and a lower air passage 302 inside. The upper air passage 301 and the lower air passage 302 are respectively connected to the air passage 101 inside the pagoda head seat 1. The pagoda head 501 of the vacuum sensor 5 is slidably connected to the sealing rubber layer 3 outside.

[0019] The plunger rubber 4 is inverted T-shaped, including a bottom protrusion 401, a column part 402, a second air passage 403, and a third air passage 404. The column part 402 is located above the bottom protrusion 401, the second air passage 403 is located inside the column part 402, and the third air passage 404 is located on the outer wall of the column part 402. The second air passage 403 and the third air passage 404 are connected. The column part 402 is used to fit inside the pagoda head 501 of the vacuum sensor 5.

[0020] The bottom protrusion 401 of the plunger rubber 4 opens or blocks the air passage of the sealing rubber layer 3 by sliding.

[0021] The air passage of the sealing rubber layer 3 is the upper air passage 301.

[0022] Working principle

[0023] See Figure 2 , 3 During testing, the pagoda head 501 of the vacuum sensor 5 is aligned with the inner diameter of the sealing rubber layer 3 and pressed into it. During the pressing process, the inner surface of the pagoda head of the vacuum sensor is pressed against the upper end face of the column part 402 of the plunger rubber 4, and the second air passage 403 is connected to the detection air port of the vacuum sensor 5.

[0024] Pushing the plunger rubber 4 downward to compress the spring 2, when the plunger rubber 4 moves down to open the upper air passage 301 of the sealing rubber layer 3, the air passage 304 of the plunger rubber 4 is connected to the air passage 101 of the pagoda head seat 1 through the upper air passage 301, and the vacuum source is connected through the air passage 101 to start vacuuming.

[0025] When the test is completed, the vacuum sensor 5 is moved upward, and the plunger rubber 4 moves upward with the help of the spring, thereby blocking the upper air passage 301 and cutting off the vacuum channel.

[0026] Repeat the above process until the next vacuum sensor is tested.

Claims

1. A plunger-type quick connector, characterized in that: The piston rubber is in sliding connection with the sealing rubber layer on the side surface of the convex part at the bottom end of the piston rubber, and in pressure connection with the spring on the bottom surface of the piston rubber.

2. A quick-disconnect plug-in connector of the type described in claim 1, characterized in that: The tower head seat comprises a gas channel one, a vacuum source connecting head, a spring cavity and a seat body, wherein the bottom end of the seat body is provided with the vacuum source connecting head, and the seat body is internally provided with the gas channel one which is opened at the bottom of the vacuum source connecting head and located in the wall of the seat body through the spring cavity.

3. A quick-disconnect plug-in connector of the type described in claim 2, characterized in that: The vacuum source connecting head adopts the tower head.

4. A quick-disconnect plug-in connector of the type described in claim 1, characterized in that: The sealing rubber layer is internally provided with an upper gas channel and a lower gas channel, and the upper gas channel and the lower gas channel are respectively communicated with the gas channel one in the tower head seat.

5. A quick-disconnect plug-in connector of the type described in claim 1, characterized in that: The piston rubber is in sliding connection with the sealing rubber layer on the side surface of the convex part at the bottom end of the piston rubber, and in pressure connection with the spring on the bottom surface of the piston rubber.

6. A quick-disconnect plug-in connector of the type described in claim 5, characterized in that: The bottom end convex part of the piston rubber opens or blocks the gas channel of the sealing rubber layer through sliding.

7. A luer-activated cartridge according to claim 1, wherein: The gas channel of the sealing rubber layer is the upper gas channel.

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