Air tightness detection device for gas leather cup

Abstract

The present invention discloses an airtightness detection device for a gas leather cup. The key points of the technical solution include a base, a lower module is installed on the base, a column is fixed to the base, an upper module is provided on the column, and a piston cylinder for driving the upper module to press the lower module is provided on the column; a groove is opened in the lower module, a stepped ring is provided on the inner side wall of the groove, a positioning convex block is provided in the middle of the groove, and the upper end surfaces of the stepped ring and the positioning convex block are both lower than the top end of the groove; the upper module is provided with an outer plane for pressing the stepped ring, and the upper module is provided with an inner plane for pressing the positioning convex block; an air inlet pipe is provided in the groove, the groove is connected with a pressure detector, the pressure detector is connected with an alarm, the alarm is provided with a pressure threshold, and when the value of the pressure detector is lower than the pressure threshold, the alarm emits an alarm signal. By performing a pressure holding test on the sealed leather cup and judging whether the leather cup leaks or is damaged by detecting the pressure state at the leather cup by the pressure detector, the detection accuracy and success rate are greatly improved.

Description

Technical Field

[0001] The present invention relates to the field of rubber valve sheet detection, and more specifically, to an airtightness detection device for a gas leather cup. Background Art

[0002] Most leather cups are made of rubber. The main body of the leather cup is a circular ring structure with a central opening; the leather cup is mostly used in the valve body of a gas device and needs to have good sealing performance.

[0003] Now retrieve a Chinese patent document with the application number CN202020275373.0, whose patent name is a highly sensitive gas self-closing valve. It is recorded in

[13] of its specification that "it includes a valve body 14, a vertical valve stem 23, a leather cup 2, and a valve cover 3. A valve cavity 24 is arranged inside the valve body 14, and the valve cavity 24 has an upper opening, and the upper opening is covered and sealed by the leather cup 2".

[0004] Since when the leather cup is in use, its outer ring and inner ring are fixed, and the middle position of the leather cup is under pressure to play a sealing role. Therefore, the frequent deformation of the middle position of the leather cup requires excellent sealing performance;

[0005] Also due to the above-mentioned use conditions, after the leather cup is processed and formed, it needs to be individually detected to check whether the leather cup is damaged. The traditional detection method is to irradiate the surface of the leather cup with light, and the inspector observes from the other side of the light source to see if there is light transmission through the leather cup, so as to judge whether the leather cup is damaged.

[0006] Such a detection method of manual observation has low detection efficiency, and it is easy for the inspector to be negligent in observation and other reasons to cause detection errors, and the misdetection rate is relatively high. Summary of the Invention

[0007] The purpose of the present invention is to provide an airtightness detection device for a gas leather cup. By performing a pressure holding test on the sealed leather cup and using a pressure detector to detect the pressure state at the leather cup to judge whether the leather cup leaks or is damaged, the detection accuracy and success rate are greatly improved.

[0008] The above technical purpose of the present invention is achieved through the following technical solutions:

[0009] An airtightness detection device for a gas leather cup, comprising a base, a lower module is installed on the base, a column is fixed to the base, an upper module is provided on the column, and a piston cylinder for driving the upper module to press the lower module is provided on the column; a groove is provided in the lower module, a stepped ring is provided on the inner side wall of the groove, a positioning protrusion is provided in the middle of the groove, and the upper end surfaces of the stepped ring and the positioning protrusion are both lower than the top of the groove; the upper module is provided with an outer plane for pressing the stepped ring, and the upper module is provided with an inner plane for pressing the positioning protrusion; an air inlet pipe is provided in the groove, a control valve is provided on the air inlet pipe, the groove is connected with a pressure detector, the pressure detector is connected with an alarm, the alarm is provided with a pressure threshold, and when the value of the pressure detector is lower than the pressure threshold, the alarm emits an alarm signal.

[0010] Preferably, the upper end surfaces of the stepped ring and the positioning protrusion are flush.

[0011] Preferably, the upper end surface of the positioning protrusion is 1 mm lower than the top of the groove.

[0012] Preferably, an accommodation groove for the deformation of the leather cup is provided between the outer plane and the inner plane.

[0013] Preferably, the outer plane and the inner plane are the same flat surface.

[0014] Preferably, the pressure alarm is connected to the air inlet pipe, and the pressure alarm is located between the control valve and the lower module.

[0015] Preferably, a barometer is installed on the pressure detector.

[0016] Preferably, the alarm is a buzzer or a light emitter.

[0017] Preferably, the inlet of the air inlet pipe is located at the bottom of the groove.

[0018] Preferably, the positioning protrusion is provided with an annular groove, a vertical groove is provided at the center of the positioning protrusion, the vertical groove is located at the center of the annular groove, and a communication groove is provided between the vertical groove and the annular groove; a lifting column slides in the vertical groove, and a spring for supporting the lifting column is provided at the bottom of the vertical groove; a connecting rod that slides in the communication groove is fixed to the lifting column, and an annular lifting piece that slides in the annular groove is fixed to the connecting rod; when the upper module presses down, the lifting column is pressed into the vertical groove; when the upper module moves up, the upper end of the lifting column extends out of the vertical groove, and the upper end of the connecting rod is lower than the upper end of the communication groove, and the upper end of the annular lifting piece is lower than the annular groove.

[0019] In summary, the present invention has the following beneficial effects:

[0020] The leather cup is sleeved on the positioning bump to be positioned and placed in the groove. The inner edge of the leather cup covers the positioning bump, and the outer edge of the leather cup covers the step ring. After the upper module and the lower module are closed, a sealed cavity is formed, and the leather cup separates the sealed cavity. After the air inlet pipe is inflated in the groove, the control valve is closed, and the leather cup is used to achieve pressure holding and sealing. If the leather cup is damaged, the gas will fill the entire sealed cavity formed by the upper module and the lower module through the leather cup, so that the air pressure will also decrease. The pressure detector can detect the decreased air pressure value and make the alarm sound. Description of the Drawings

[0021] Figure 1 is a schematic structural diagram of Embodiment 1;

[0022] Figure 2 is a schematic structural diagram of the lower module in Embodiment 1;

[0023] Figure 3 is a sectional view of the upper and lower modules when the leather cup is placed in the lower module in Embodiment 1;

[0024] Figure 4 is Figure 3 an enlarged view of Part A in

[0025] Figure 5 is a sectional view of the upper and lower modules when the leather cup is placed in the lower module in Embodiment 2;

[0026] Figure 6 is an exploded schematic diagram of the lifting post and the lower module in Embodiment 3;

[0027] Figure 7 is a schematic diagram of the lifting post located in the lower module in Embodiment 3;

[0028] Figure 8 is a sectional view of the upper and lower modules when the leather cup is placed in the lower module in Embodiment 3;

[0029] Figure 9 is Figure 8 an enlarged view of Part B in

[0030] In the figure:

[0031] 11. Base; 12. Column; 13. Piston cylinder;

[0032] 21. Lower module; 22. Upper module;

[0033] 31. Groove; 32. Step ring; 33. Positioning bump;

[0034] 41. Outer plane; 42. Inner plane;

[0035] 51. Air inlet pipe; 52. Control valve; 53. Pressure detector; 54. Alarm; 55. Air pressure display meter;

[0036] 6. Accommodating groove;

[0037] 81. Annular groove; 82. Vertical groove; 83. Connecting groove;

[0038] 91. Lifting column; 92. Link rod; 93. Annular lifting piece; 94. Spring;

[0039] 101. Leather cup; 102. Outer edge; 103. Inner edge. Specific implementation mode

[0040] The present invention will be further described in detail below with reference to the accompanying drawings.

[0041] Embodiment 1, an airtightness detection device for a gas leather cup, referring to Figures 1-4 , including a base 11,

[0042] A column 12 is fixed on the base 11, and an upper plate is fixed on the column 12. The upper plate and the base 11 correspond up and down.

[0043] A piston cylinder 13 is installed on the upper plate of the column 12.

[0044] A lower module 21 is installed on the base 11. The piston rod of the piston cylinder 13 extends downward out of the upper plate, and an upper module 22 is fixed to the piston rod of the piston cylinder 13; the upper module 22 and the lower module 21 correspond up and down; under the drive of the piston cylinder 13, the upper module 22 and the lower module 21 perform mold closing and mold opening actions.

[0045] The lower module 21 is provided with a groove 31. The groove 31 is a circular groove. A step ring 32 is provided on the inner side wall of the groove 31. The step ring 32 is an annulus. A positioning convex block 33 is provided in the middle of the groove 31. The positioning convex block 33 is a cylindrical convex block.

[0046] The upper end surfaces of both the step ring 32 and the positioning convex block 33 are lower than the top end of the groove 31. The upper end surface of the positioning convex block 33 is 1 mm lower than the top end of the groove 31. The upper end surfaces of the step ring 32 and the positioning convex block 33 are located on the same horizontal plane.

[0047] The step ring 32 and the positioning convex block 33 are used to position and place the leather cup 101. The outer edge 102 of the leather cup 101 covers the step ring 32,

[0048] The inner edge 103 of the leather cup 101 covers the positioning convex block 33. Through the positioning of the step ring 32 and the positioning convex block 33, the leather cup 101 is accurately placed in the groove 31.

[0049] The positioning bump 33 is provided with an annular groove 81, and the annular groove 81 is used to be covered by the inner edge 103 of the leather cup 101. This is beneficial to reducing the contact surface between the leather cup 101 and the positioning bump 33. The design purpose is that the leather cup 101 is mostly made of rubber and has adhesive properties. After the upper module 22 and the lower module 21 are pressed together, the leather cup 101 fits tightly with the lower module 21, and it is rather troublesome to take out. However, the annular groove 81 reduces the fitting surface between the positioning bump 33 and the inner edge 103 of the leather cup 101, making it more convenient and labor-saving to take out.

[0050] The upper module 22 is provided with an outer plane 41 of the pressing step ring 32, and the upper module 22 is provided with an inner plane 42 for pressing the positioning bump 33. The outer plane 41 is an annular surface, and the inner plane 42 is a circular surface. In this embodiment, the outer plane 41 and the inner plane 42 are the same flat surface. Figure 3 In the middle, the outer plane 41 and the inner plane 42 adopt different profiles for distinction.

[0051] An air inlet pipe 51 is arranged in the groove 31. The inlet of the air inlet pipe 51 is located at the bottom of the groove 31. The air inlet pipe 51 is provided with a control valve 52, and the control valve 52 is an electromagnetic valve.

[0052] The groove 31 is connected with a pressure detector 53. The pressure detector 53 is located on the air inlet pipe 51, and the pressure detector 53 is located on the pipeline between the electromagnetic valve and the lower module 21.

[0053] The pressure detector 53 is connected with an alarm 54. The alarm 54 is provided with a pressure threshold. When the value of the pressure detector 53 is lower than the pressure threshold, the alarm 54 emits an alarm signal; the alarm 54 is a buzzer or a light emitter.

[0054] The pressure detector 53 is equipped with a barometer 55.

[0055] Working principle: The leather cup 101 is placed on the lower module 21, and then the upper module 22 moves downward under the push of the cylinder. The upper module 22 and the lower module 21 clamp and press the inner edge 103 and the outer edge 102 of the leather cup 101, so that the leather cup 101 divides the cavity formed by the upper module 22 and the lower module 21 into two upper and lower isolation chambers.

[0056] Then, after the air inlet pipe 51 inflates air towards the bottom of the groove 31, the control valve 52 is closed. The control valve 52 can control the air volume of the intake air and the intake unit time.

[0057] After a certain amount of gas is input into the groove 31, the control valve 52 is closed, and the pressure detector 53 detects the air pressure value between the leather cup 101 and the lower module 21 to realize the pressure holding test.

[0058] If the leather cup 101 is normal and not damaged, the test value of the pressure detector 53 is equal to the set threshold.

[0059] If the leather cup 101 is normally damaged, part of the air pressure flows upward to the module 22 through the leather cup 101, increasing the volume of the air flow. As a result, the air pressure value between the leather cup 101 and the lower module 21 is relatively small, and the test value of the pressure detector 53 is less than the set threshold. The pressure detector 53 sends an electrical signal to the alarm 54, and the alarm 54 gives an alarm reminder.

[0060] Embodiment 2. A gas-tightness detection device for a gas leather cup, which is different from Embodiment 1 in that, referring to Figure 5 , there is a receiving groove 6 for the deformation of the leather cup 101 between the outer plane 41 and the inner plane 42.

[0061] The receiving groove 6 provides more air flow space. When the middle of the leather cup 101 is damaged, the air pressure value between the upper module 22 and the lower module 21 drops more significantly, and the detection value feedback of the pressure detector 53 is more accurate.

[0062] Embodiment 3. A gas-tightness detection device for a gas leather cup, which is different from Embodiment 1 or Embodiment 2 in that, referring to Figures 6-9 , the positioning convex block 33 is provided with an annular groove 81, and a vertical groove 82 is provided at the center of the positioning convex block 33; the vertical groove 82 is a circular hole groove with the notch at the upper end, and the vertical groove 82 is located at the center of the annular groove 81.

[0063] A communication groove 83 is provided between the vertical groove 82 and the annular groove 81. The communication groove 83 is a long strip groove. In this embodiment, there are 2 communication grooves 83;

[0064] A lifting column 91 slides in the vertical groove 82, and a spring 94 for supporting the lifting column 91 is provided at the bottom of the vertical groove 82; a connecting rod 92 that slides in the communication groove 83 is fixed to the lifting column 91, and the connecting rod 92 moves up and down in the communication groove 83; a circular ring lifting piece 93 that slides in the annular groove 81 is fixed to the connecting rod 92, and the circular ring lifting piece 93 moves up and down in the annular groove 81.

[0065] Working principle:

[0066] When the upper module 22 is pressed down, the lifting column 91 is pressed into the vertical groove 82;

[0067] After the upper module 22 moves up, the lifting column 91 rises under the action of the spring 94. At this time, the upper end of the connecting rod 92 is lower than the upper end of the communication groove 83, and the upper end of the circular ring lifting piece 93 is lower than that of the annular groove 81.

[0068] After the upper module 22 moves up, the upper end of the lifting column 91 extends out of the vertical groove 82. The staff can lift the lifting column 91, so that the circular ring lifting piece 93 synchronously extends out of the annular groove 81. The circular ring lifting piece 93 will lift the leather cup 101 covering the annular groove 81, enabling the leather cup 101 to be quickly separated from the lower module 21, which can improve the detection efficiency of the leather cup 101.

[0069] The above are only the preferred embodiments of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions falling within the concept of the present invention belong to the protection scope of the present invention. It should be noted that for those of ordinary skill in the art, several improvements and refinements made without departing from the principle of the present invention should also be regarded as within the protection scope of the present invention.

Claims

1. An airtightness detection device for a gas leather cup, characterized in that: It includes a base (11). The base (11) is installed with a lower module (21), and a column (12) is fixed to the base (11). An upper module (22) is provided on the column (12), and a piston cylinder (13) for driving the upper module (22) to press against the lower module (21) is provided on the column (12). The lower module (21) is provided with a groove (31). A stepped ring (32) is provided on the inner side wall of the groove (31), and a positioning convex block (33) is provided in the middle of the groove (31). The upper end surfaces of the stepped ring (32) and the positioning convex block (33) are both lower than the top end of the groove (31). The upper module (22) is provided with an outer plane (41) for pressing against the stepped ring (32), and an inner plane (42) for pressing against the positioning convex block (33). An air inlet pipe (51) is provided in the groove (31). A control valve (52) is provided on the air inlet pipe (51). A pressure detector (53) is connected to the groove (31), and an alarm (54) is connected to the pressure detector (53). The alarm (54) is provided with a pressure threshold value. When the value detected by the pressure detector (53) is lower than the pressure threshold value, the alarm (54) emits an alarm signal. The positioning convex block (33) is provided with an annular groove (81), and a vertical groove (82) is provided at the center of the positioning convex block (33). The vertical groove (82) is located at the center of the annular groove (81), and a communication groove (83) is provided between the vertical groove (82) and the annular groove (81). A lifting column (91) slides in the vertical groove (82), and a spring (94) for supporting the lifting column (91) is provided at the bottom of the vertical groove (82). The lifting column (91) is fixed with a connecting rod (92) that slides in the communication groove (83), and the connecting rod (92) is fixed with an annular lifting piece (93) that slides in the annular groove (81). When the upper module (22) presses down, the lifting column (91) is pressed into the vertical groove (82). When the upper module (22) moves upward, the upper end of the lifting column (91) extends out of the vertical groove (82), and the upper end of the connecting rod (92) is lower than the upper end of the communication groove (83), and the upper end of the annular lifting piece (93) is lower than the upper edge of the notch of the annular groove (81).

2. The airtightness detection device for the gas leather cup according to claim 1, characterized in that: The upper end surfaces of the stepped ring (32) and the positioning convex block (33) are flush with each other.

3. The airtightness detection device for the gas leather cup according to claim 2, characterized in that: The upper end surface of the positioning convex block (33) is 1 mm lower than the top end of the groove (31).

4. The airtightness detection device for the gas leather cup according to claim 2, characterized in that: There is a receiving groove (6) for the deformation of the leather cup between the outer plane (41) and the inner plane (42).

5. The airtightness detection device for the gas leather cup according to claim 2, characterized in that: The outer plane (41) and the inner plane (42) are the same flat surface.

6. The airtightness detection device for the gas leather cup according to claim 1, characterized in that: The pressure alarm (54) is connected to the air inlet pipe (51), and the pressure alarm (54) is located between the control valve (52) and the lower module (21).

7. The airtightness detection device for the gas leather cup according to claim 1, characterized in that: The pressure detector (53) is installed with a barometric display meter (55).

8. The airtightness detection device for the gas leather cup according to claim 1, characterized in that: The alarm (54) is a buzzer or a light emitter.

9. The airtightness detection device for the gas leather cup according to claim 1, characterized in that: The inlet of the air inlet pipe (51) is located at the bottom of the groove (31).

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