Air tightness detection tool for parts

Abstract

The utility model provides a part air tightness detection tool, a pedestal is provided with a mounting groove, a part to be detected is placed in the mounting groove, an upper cover is used for plugging the mounting groove, the upper cover is connected to a pressing handle through a mounting seat, one end of the pressing handle is mounted on the pedestal, the pressing handle is used for driving the upper cover to move, the upper cover is provided with an air inlet hole, and the air inlet hole is communicated with the mounting seat. The air inlet hole is communicated to external air injection equipment through a pipeline, the external air injection equipment injects air into the mounting groove or the to-be-detected part through the pipeline and maintains pressure, and an air pressure sensor is arranged on the pipeline and is used for detecting air pressure in the mounting groove or the to-be-detected part. According to the air tightness detection tool for the part, air is injected into the mounting groove or the part to be detected through the external air injection equipment, then pressure is maintained for a certain time, whether the part to be detected has a natural gap or not is judged according to the air pressure value detected by the observation air pressure sensor, the air tightness of the part to be detected is detected, and the tool is low in manufacturing cost, high in flexibility and high in practicability. The detection quality is reliable.

Description

Technical Field

[0001] The utility model belongs to the field of air tightness detection of plastic parts, and particularly relates to an air tightness detection tooling for parts. Background Art

[0002] The power switch controls the switch tube through a circuit to conduct and cut off at high speed, converts direct current into high-frequency alternating current and supplies it to a transformer for voltage transformation, so as to generate one or more groups of required voltages. In the prior art, the power switch is an injection-molded shell with multiple injection-molded parts or metal parts assembled inside. In a special working environment, a certain air tightness needs to be ensured between the injection-molded shell and the parts assembled with it. The air tightness test equipment in the prior art has a high cost and cannot meet the test requirements of parts with multiple specifications. Content of the Utility Model

[0003] In view of this, the utility model aims to provide an air tightness detection tooling for parts to solve the problems of complex operation and high equipment cost of the existing technology for detecting the air tightness of parts.

[0004] To achieve the above object, the technical solution of the utility model is realized as follows:

[0005] An air tightness detection tooling for parts includes a base, an upper cover, a mounting seat and a pressing handle. An installation groove is arranged on the base, and the part to be detected is placed in the installation groove. The upper cover is used to block the installation groove, and the upper cover is connected to the pressing handle through the mounting seat. One end of the pressing handle is installed on the base, and the pressing handle is used to drive the upper cover to move. An air inlet hole is arranged on the upper cover, and the air inlet hole is connected to an external air injection device through a pipeline. The external air injection device injects air into the installation groove or the part to be detected through the pipeline and maintains the pressure. A pressure sensor is arranged on the pipeline, and the pressure sensor is used to detect the air pressure in the installation groove or the part to be detected.

[0006] Further, a sealing boss is arranged in the installation groove, and the sealing boss is used to block the opening of the part to be detected, and the periphery of the sealing boss is hermetically connected to the opening of the part to be detected.

[0007] Further, an avoidance hole is arranged in the installation groove, and the avoidance hole is used to avoid the protrusion of the part to be detected, and the periphery of the protrusion of the part to be detected is hermetically connected to the avoidance hole.

[0008] Further, a vent hole is arranged on the base, and the vent hole is communicated with the part to be detected or the installation groove.

[0009] Further, the mounting seat includes a seat body, the seat body is fixedly installed on the upper end of the upper cover, a connecting rod is rotatably sleeved on the seat body, a through hole is arranged on the pressing handle, and one end of the connecting rod passes through the through hole and is threadedly connected with a nut.

[0010] Further, the cross-section of the connecting rod is an L-shaped or T-shaped structure.

[0011] Compared with the prior art, the airtightness detection tooling for the parts of the present utility model has the following beneficial effects: The part is sealed and installed in the installation groove, and an external air injection device is used to inject air into the installation groove or the part to be detected, and then the pressure is maintained for a certain period of time. According to the air pressure value detected by the observed air pressure sensor, it is judged whether there are natural gaps in the part to be detected, and the airtightness of the part to be detected is detected. This tooling can be adapted and manufactured according to the shape and size of the part, and has low manufacturing cost, high flexibility, and reliable detection quality.

[0012] When the external air injection device injects air into the installation groove, the pressure relief hole is communicated to the inside of the part to be detected. If the part to be detected is not well sealed, the installation groove will relieve pressure from the inside of the part to be detected to the pressure relief hole. When the external air injection device injects air into the inside of the part to be detected, the pressure relief hole is communicated to the installation groove. If the part to be detected is not well sealed, the inside of the part to be detected will relieve pressure through the installation groove and the pressure relief hole, successively meeting different usage conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The drawings constituting a part of the present utility model are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0014] Figure 1 is a schematic structural diagram of the airtightness detection tooling for the parts of the embodiment of the present utility model;

[0015] Figure 2 is a schematic structural diagram of the base adapting to the part to be detected in the embodiment of the present utility model;

[0016] Figure 3 is a schematic structural diagram of the base in the embodiment of the present utility model;

[0017] Figure 4 is a schematic structural diagram of the connection between the upper cover and the mounting seat in the embodiment of the present utility model.

[0018] Description of the reference numerals:

[0019] 1 - Base; 11 - Installation groove; 12 - Avoidance hole; 13 - Sealing boss; 2 - Upper cover; 3 - Mounting seat; 31 - Seat body; 32 - Connecting rod; 33 - Nut; 4 - Pressing handle; 5 - Part to be detected. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0021] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, terms such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise stated, the meaning of "a plurality" is two or more.

[0022] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood through specific circumstances.

[0023] The present utility model will be described in detail below with reference to the drawings and in conjunction with embodiments.

[0024] As Figures 1-4 shown, the airtightness detection tooling for parts includes a base 1, an upper cover 2, a mounting seat 3, and a pressing handle 4. An installation groove 11 is provided on the base 1, and the part to be detected is placed in the installation groove 11. The upper cover 2 is used to seal the installation groove 11, and the upper cover 2 is connected to the pressing handle 4 through the mounting seat 3. One end of the pressing handle 4 is mounted on the base 1, and the pressing handle 4 is used to drive the upper cover 2 to move. An air inlet hole is provided on the upper cover 2, and the air inlet hole is connected to an external air injection device through a pipeline. The external air injection device injects air into the installation groove 11 or the part to be detected through the pipeline and maintains the pressure. A pressure sensor is provided on the pipeline, and the pressure sensor is used to detect the air pressure in the installation groove 11 or the part to be detected. The part is hermetically installed in the installation groove 11. Air is injected into the installation groove 11 or the part to be detected through the external air injection device, and then the pressure is maintained for a certain period of time. Whether there are natural gaps in the part to be detected 5 is judged according to the air pressure value detected by observing the pressure sensor, and the airtightness of the part to be detected 5 is detected. This tooling can be adapted and manufactured according to the external dimensions of the parts, and has low manufacturing cost, high flexibility, and reliable detection quality.

[0025] As Figure 3As shown, a sealing boss 13 is provided in the installation groove 11. The sealing boss 13 is used to seal the opening of the part to be tested 5. A sealing rubber ring is provided around the sealing boss 13. The periphery of the sealing boss 13 is hermetically connected to the opening of the part to be tested 5 through the sealing rubber ring to prevent pressure relief in this part.

[0026] A relief hole is provided in the installation groove 11. The relief hole is used to avoid the protrusion of the part to be tested 5. And the periphery of the protrusion of the part to be tested 5 is hermetically connected to the relief hole. A sealing rubber ring is provided in the relief hole. The periphery of the protrusion of the part to be tested 5 is hermetically connected to the relief hole through the sealing rubber ring to prevent the protrusion of the part to be tested 5 from causing unstable installation and to prevent pressure relief in this part.

[0027] The base 1 is provided with a pressure relief hole, and the pressure relief hole communicates with the part to be tested or the installation groove 11. When an external gas injection device injects gas into the installation groove 11, the pressure relief hole communicates with the inside of the part to be tested. If the part to be tested has poor sealing, the installation groove 11 relieves pressure from the inside of the part to be tested to the pressure relief hole. When the external gas injection device injects gas into the inside of the part to be tested, the pressure relief hole communicates with the installation groove 11. If the part to be tested has poor sealing, the inside of the part to be tested relieves pressure through the installation groove 11 and the pressure relief hole to meet different operating conditions in turn.

[0028] The mounting seat 3 includes a seat body 31. The seat body 31 is fixedly installed on the upper end of the upper cover 2. A connecting rod 32 is rotatably sleeved on the seat body 31. The pressing handle 4 is provided with a through hole. One end of the connecting rod 32 passes through and is threadedly connected to a nut 33. The cross section of the connecting rod 32 is an L-shaped or T-shaped structure. As Figure 4 shown, the cross section of the connecting rod 32 in this embodiment is a T-shaped structure. The upper cover 2 can rotate with the connecting rod 32, which is convenient for the staff to adjust the relative position of the upper cover 2.

[0029] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. The air tightness detection tool for parts is characterized by: The invention comprises a base (1), an upper cover (2), a mounting seat (3) and a clamping handle (4); a mounting groove (11) is arranged on the base (1); a part to be detected is placed in the mounting groove (11); the upper cover (2) is used to block the mounting groove (11); the upper cover (2) is connected to the clamping handle (4) through the mounting seat (3); one end of the clamping handle (4) is mounted on the base (1); the clamping handle (4) is used to drive the upper cover (2) to move; an air inlet is arranged on the upper cover (2); the air inlet is connected to an external air injection device through a pipeline; the external air injection device injects air into the mounting groove (11) or the part to be detected through the pipeline and maintains the pressure; an air pressure sensor is arranged on the pipeline; the air pressure sensor is used to detect the air pressure in the mounting groove (11) or the part to be detected.

2. The air tightness detection tool for parts according to claim 1, characterized in that: A blocking boss (13) is arranged in the installation groove (11), and the blocking boss (13) is used to block the opening of the part to be tested (5), and the periphery of the blocking boss (13) is sealed and connected to the opening of the part to be tested (5).

3. The air tightness detection tool for parts according to claim 1, characterized in that: An avoidance hole is provided in the installation groove (11), the avoidance hole is used to avoid the protrusion of the part to be tested (5), and the periphery of the protrusion of the part to be tested (5) is sealed and connected to the avoidance hole.

4. The air tightness detection tool for parts according to claim 1, characterized in that: The base (1) is provided with an air leakage hole, which is connected to the part to be detected or the installation groove (11).

5. The air tightness detection tool for parts according to claim 1, characterized in that: The mounting seat (3) comprises a seat body (31), the seat body (31) is fixedly mounted to the upper end of the upper cover (2), a connecting rod (32) is rotatably sleeved on the seat body (31), a through hole is provided on the clamping handle (4), one end of the connecting rod (32) passes through the rear threaded connection nut (33).

6. The air tightness detection tool for parts according to claim 5, characterized in that: The cross section of the connecting rod (32) is an L-shaped or T-shaped structure.

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