Air tightness detection equipment

Abstract

The utility model discloses air tightness detection equipment, and relates to the technical field of detection equipment, in particular to the air tightness detection equipment, which comprises a first tool main body, a second tool main body and a third tool main body, a first mounting groove is formed in the first tool main body, the first tool main body is used for being assembled with the head end of a fluid connector to form a first sealing cavity, and the first mounting groove is communicated with an external air source through an air valve; a second mounting groove is formed in the second tool main body, the second tool main body is used for being assembled with the tail end of the fluid connector to form a second sealing cavity, and the second mounting groove communicates with an external water storage groove through an air guide pipe; according to the air tightness detection equipment, the sealing chambers are respectively formed at the two ends of the fluid connector in a mold closing manner, one group of the sealing chambers are inflated and pressurized, and the air pressure change of the other group of the sealing chambers is judged according to the condition that bubbles are guided out from the air guide pipe, so that the air tightness of the fluid connector is detected and judged; the detection steps are simplified, the detection efficiency is improved, and the detection cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of detection equipment, and more specifically, to an airtightness detection device. Background Art

[0002] Proposed by the European Committee for Electrotechnical Standardization, the protection grades of electrical equipment enclosures are divided into many categories. According to different numbers, the protection grades of products can be quickly and conveniently determined. As an important component for connecting high-pressure fluid pipelines and controlling the on-off of pipelines, fluid connector products have high standards for protection safety levels. Therefore, the airtightness of fluid connector products is particularly important.

[0003] In the prior art, for the airtightness detection of fluid connectors, the main method is water detection. Specifically, the end of the fluid connector product is blocked to ensure a sealed state; it is placed at a water depth of 1 meter for 30 minutes, and the detection result is determined by whether the waterproof discoloring silica gel inside the fluid connector changes color. The relevant disadvantages of this method are as follows:

[0004] 1. It is necessary to block the ends of the products one by one, usually by screwing the sealing nut. This operation is troublesome and time-consuming, and the efficiency is low;

[0005] 2. After the detection, it is necessary to remove the end seal. During the process, water vapor may enter the inside of the fluid connector, resulting in inaccurate detection accuracy;

[0006] 3. The use cost of the discoloring silica gel is relatively high.

[0007] In summary, how to provide an airtightness detection device that can solve the problems of cumbersome detection steps, low efficiency, and high cost is an urgent problem to be solved by those skilled in the art at present. Summary of the Utility Model

[0008] In view of this, the purpose of the utility model is to provide an airtightness detection device. By forming sealed chambers at both ends of the fluid connector in the form of mold closing, one set of sealed chambers is inflated and pressurized, and the air pressure change of the other set of sealed chambers is judged by the situation of bubbles led out through the air duct, so as to detect and judge the airtightness of the fluid connector, thereby simplifying the detection steps, improving the detection efficiency, and reducing the detection cost.

[0009] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0010] An airtightness detection device for detecting the airtightness of a fluid connector, the airtightness detection device includes:

[0011] The first tooling main body is internally provided with a first installation groove for assembling with the head end of the fluid connector to form a first sealing cavity, and the first installation groove is communicated with an external air source through an air valve;

[0012] The second tooling main body is internally provided with a second installation groove for assembling with the tail end of the fluid connector to form a second sealing cavity, and the second installation groove is communicated with an external water storage tank through a gas guide pipe;

[0013] The driving cylinder has two ends respectively connected to the first tooling main body and the second tooling main body, and is used for driving the first tooling main body and the second tooling main body to close the mold and demold.

[0014] Preferably, a pressure gauge is further arranged in the first tooling main body, and the detection end of the pressure gauge is communicated with the first installation groove, and the pressure gauge is used for detecting the gas pressure in the first sealing cavity.

[0015] Preferably, a first sealing ring is arranged at the contact position between the first installation groove and the fluid connector; and / or a second sealing ring is arranged at the contact position between the second installation groove and the fluid connector.

[0016] Preferably, a support block is arranged between the opposite surfaces of the first tooling main body and the second tooling main body. When the first tooling main body and the second tooling main body close the mold, the opposite surfaces of the first tooling main body and the second tooling main body are simultaneously abutted against the support block.

[0017] Preferably, the airtightness detection device further includes:

[0018] A base fixedly installed with the second tooling main body;

[0019] A top plate fixedly installed with the driving cylinder and relatively fixed to the base, and the driving cylinder is vertically arranged;

[0020] A lifting sliding plate fixedly installed with the first tooling main body, fixedly connected to the telescopic end of the driving cylinder, and slidably installed with the base and the top plate through a vertical sliding rail.

[0021] Preferably, a cushion block is arranged in the base, and the second tooling main body is placed on the surface of the cushion block and fixed by a clamping assembly.

[0022] Preferably, positioning columns and positioning holes are respectively arranged at corresponding positions in the first tooling main body and the second tooling main body. When the first tooling main body and the second tooling main body close the mold, the positioning columns can be inserted into the positioning holes, and there are at least two groups of the positioning columns and the positioning holes.

[0023] Preferably, a transmissive photoelectric sensor is provided at the front end of the base, and the transmissive photoelectric sensor is electrically connected to the control unit of the driving cylinder.

[0024] The airtightness detection device provided by the present utility model has at least the following beneficial effects compared with the prior art:

[0025] 1. Installation grooves are provided in the first tooling main body and the second tooling main body, and the installation grooves can be assembled with the ends of the fluid connectors. By closing the molds of the first tooling main body and the second tooling main body, both ends of the fluid connectors are sealed, simplifying the preparatory work before the detection of the fluid connectors, and thus improving the detection efficiency;

[0026] 2. By inserting the air guide pipe deep into the water storage tank, if the airtightness of the fluid connector is insufficient, the pressure in the second sealing cavity will increase, and the gas will enter the water storage tank through the air guide pipe, thereby forming bubbles in the water storage tank. The result is intuitive and easy to observe, and the entire assembly process of the fluid connector will not affect the detection result, ensuring the accuracy of the detection result;

[0027] 3. During the entire detection process, the detection device can be recycled, and there are no disposable consumables, so the detection cost is relatively low, which is suitable for full inspection of products, and thus can ensure the product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained according to the provided drawings without creative efforts.

[0029] Figure 1 is a schematic structural diagram of the specific airtightness detection device provided by the present utility model;

[0030] Figure 2 is a schematic back structure diagram of the specific airtightness detection device provided by the present utility model;

[0031] Figure 3 is a cross-sectional view of the specific airtightness detection device provided by the present utility model;

[0032] Figure 4 is a longitudinal cross-sectional view of the specific airtightness detection device provided by the present utility model;

[0033] Figure 5 is a schematic structural diagram of the first tooling main body and the second tooling main body in a mold-closed state provided by the present utility model.

[0034] Figures 1 - 5 Among them:

[0035] 1. Support frame assembly; 101. Base; 102. Vertical slide rail; 103. Top plate; 104. Driving cylinder; 105. Through-beam photoelectric sensor

[0036] 2. Upper tooling assembly; 201. Lifting slide plate; 202. First tooling body; 203. Positioning post; 204. First installation groove; 205. Support block; 206. First sealing ring

[0037] 3. Lower tooling assembly; 301. Spacer block; 302. Second tooling body; 303. Positioning hole; 304. Second installation groove; 305. Second sealing ring; 306. Clamping assembly

[0038] 4. Pneumatic circuit assembly; 401. Air valve; 402. Air duct; 403. Pressure gauge; 404. Water storage tank; 5. Fluid connector Detailed implementation manner

[0039] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0040] The core of the present invention is to provide an airtightness detection device. By means of mold clamping, sealed chambers are respectively formed at both ends of the fluid connector. One of the sealed chambers is inflated and pressurized, and the air bubble situation is led out through the air duct to judge the air pressure change of the other sealed chamber, so as to detect and judge the airtightness of the fluid connector, thereby simplifying the detection steps, improving the detection efficiency, and reducing the detection cost.

[0041] Please refer to Figures 1 - 5 , an airtightness detection device for detecting the airtightness of the fluid connector 5. The airtightness detection device includes:

[0042] The first tooling body 202 is internally provided with a first installation groove 204 for assembling with the first end of the fluid connector 5 to form a first sealed chamber. The first installation groove 204 is connected to an external air source through the air valve 401;

[0043] The second tooling body 302 is internally provided with a second installation groove 304 for assembling with the second end of the fluid connector 5 to form a second sealed chamber. The second installation groove 304 is connected to an external water storage tank 404 through the air duct 402;

[0044] A driving cylinder, with both ends of the driving cylinder 104 connected to the first tooling main body 202 and the second tooling main body 302 respectively, for driving the first tooling main body 202 and the second tooling main body 302 to close and open the mold; during this process, it is used to realize the assembly and separation of the head end of the fluid connector 5 and the first installation groove 204, and the assembly and separation of the tail end and the second installation groove 304.

[0045] The fluid connector 5 is mainly used to connect fluid channels. Under normal conditions, it should be in a cut-off state. When the pressure in the fluid channel exceeds the set value, the fluid connector 5 is in a conducting state. Therefore, the conducting pressure of the fluid connector 5 is an important standard parameter. Therefore, when producing the fluid connector 5, it should be ensured that before the pressure in the fluid channel reaches the set value, the fluid connector 5 should be in a cut-off state, that is, its upstream end and downstream end should be absolutely sealed.

[0046] In this application, by closing the mold of the first tooling main body 202 and the second tooling main body 302, the two ends of the fluid connector 5 are quickly blocked respectively. That is, a first sealing cavity is formed by the first installation groove 204 provided in the first tooling main body 202 and the upstream end of the fluid connector 5, and a second sealing cavity is formed by the second installation groove 304 provided in the second tooling main body 302 and the downstream end of the fluid connector 5. And the first sealing cavity is connected to an external air source to inflate the first sealing cavity to increase its pressure until it does not exceed the set maximum threshold of the fluid connector 5. By detecting whether the pressure of the second sealing cavity changes, it is judged whether the sealing performance of the fluid connector 5 meets the standard; the pre-assembly process of the above fluid connector 5 before detection is simple and fast, which helps to improve the detection efficiency of the fluid connector 5.

[0047] Whether the pressure of the second sealing cavity changes is to connect the second sealing cavity to the water storage tank 404 through the air duct 402. If the pressure of the second sealing cavity increases, some gas will flow into the water storage tank 404 through the air duct 402 and form bubbles in the water storage tank 404, which proves that the airtightness of the fluid connector 5 does not meet the standard. On the contrary, if no bubbles overflow from the water storage tank 404, it proves that the airtightness of the fluid connector 5 meets the standard; the above airtightness detection method is simple and direct, the result is intuitive and easy to observe, and the assembly process of the fluid connector 5 will not affect the detection result, effectively ensuring the accuracy of the detection result.

[0048] Moreover, during the above detection process, all components can be recycled. Except for high-pressure gas, there are no any consumables, that is, the detection cost is relatively low, which is suitable for full inspection of products and ensures product quality.

[0049] In some embodiments, a number of groups of installation grooves are simultaneously provided in the first tooling main body 202 and the second tooling main body 302, that is, several groups of fluid connectors 5 can be detected simultaneously at one time, such as Figure 3As shown, four sets of installation grooves are respectively provided at corresponding positions of the first tooling main body 202 and the second tooling main body 302, and four sets of fluid connectors 5 can be detected at a time, further improving the detection efficiency.

[0050] In some embodiments, such as Figure 1 , Figure 2 and Figure 4 shown, a pressure gauge 403 is further provided in the first tooling main body 202. The detection end of the pressure gauge 403 is communicated with the first installation groove 204, and the pressure gauge 403 is used to detect the gas pressure in the first sealing cavity;

[0051] The air valve 401, the air duct 402, and the pressure gauge 403 together form an air circuit assembly 4. Among them, the pressure gauge 403 is used to detect the gas pressure in the first sealing cavity to ensure that the pressure in the first sealing cavity does not exceed the maximum set threshold of the fluid connector 5, so as to avoid inaccurate detection results caused by the direct conduction of the fluid connector 5 after the pressure in the first sealing cavity exceeds the maximum set threshold;

[0052] In some embodiments, a gas pressure transmitter is used instead of the pressure gauge 403, an electric control valve is used instead of the air valve 401, and the control unit of the gas pressure transmitter is electrically connected to the electric control valve. That is, when the gas pressure transmitter detects that the pressure in the first sealing cavity reaches the set value, the electric control valve is controlled to close or reduce the conduction amount, thereby slowing down or pausing the increase rate of the pressure in the first sealing cavity, so as to avoid the pressure in the first sealing cavity exceeding the maximum set threshold;

[0053] In some other embodiments, a pressure relief valve is communicated and arranged between the air valve 401 and the first installation groove 204, and the conduction pressure of the pressure relief valve is lower than the maximum set threshold of the fluid connector 5. When the conduction pressure of the pressure relief valve is reached, the first sealing cavity is depressurized, so as to avoid the pressure in the first sealing cavity exceeding the maximum set value of the fluid connector 5.

[0054] Such as Figure 4 and Figure 5 shown, a first sealing ring 206 is provided at the contact position between the first installation groove 204 and the fluid connector 5; and / or a second sealing ring 305 is provided at the contact position between the second installation groove 304 and the fluid connector 5;

[0055] Generally speaking, one end of the fluid connector 5 has a flat installation surface, and sealing can be completed by contacting the corresponding installation groove. The other end needs to be sealed by a sealing ring. Such as Figure 4 shown, only the first sealing ring 206 is provided in the first installation groove 204 to seal the first end of the fluid connector 5, and the second end of the fluid connector 5 is sealed by direct contact;

[0056] In some embodiments, such asFigure 5 As shown, a first sealing ring 206 is arranged in the first installation groove 204, and a second sealing ring 305 is arranged in the second installation groove 304, that is, it is used for the plugging and sealing of the head end and the tail end of the fluid connector 5 to ensure the tightness of the first sealing cavity and the second sealing cavity, and further ensure the accuracy of the detection result.

[0057] In some embodiments, as Figure 5 shown, a support block 205 is arranged between the opposite surfaces of the first tooling main body 202 and the second tooling main body 302. When the first tooling main body 202 and the second tooling main body 302 are clamped, the opposite surfaces of the first tooling main body 202 and the second tooling main body 302 are simultaneously abutted against the support block 205.

[0058] In practical applications, the fluid connector 5 itself has a certain thickness. After the first tooling main body 202 and the second tooling main body 302 are clamped, there is a certain gap between them, and the power for clamping them comes from the driving cylinder 104. By adding the support block 205 and designing the thickness of the support block 205 to be the same as the gap after the first tooling main body 202 and the second tooling main body 302 are clamped, a supporting effect is achieved, reducing the pressure on the fluid connector 5 itself, thereby avoiding damage to the fluid connector 5.

[0059] In some embodiments, the airtightness detection device further includes:

[0060] A base 101, fixedly installed with the second tooling main body 302;

[0061] A top plate 103, fixedly installed with the driving cylinder 104 and relatively fixed to the base 101, and the driving cylinder 104 is vertically arranged;

[0062] A lifting slide plate 201, fixedly installed with the first tooling main body 202, fixedly connected to the telescopic end of the driving cylinder 104, and slidably installed with the base 101 and the top plate 103 through a vertical slide rail 102;

[0063] The base 101, the top plate 103, and the vertical slide rail 102 together form a support frame 1; the lifting slide plate 201 and the first tooling main body 202 form an upper tooling assembly 2; the upper tooling assembly 2 is fixedly connected to the telescopic end of the driving cylinder 104 as a whole, so that the upper tooling assembly 2 moves as a whole relative to the support frame 1, and the vertical slide rail 102 is added to ensure the accuracy of its relative movement.

[0064] In some embodiments, a cushion block 301 is arranged in the base 101, the second tooling main body 302 is placed on the surface of the cushion block 301 and fixed by a clamping assembly 306;

[0065] The spacer block 301, the second tooling main body 302, and the clamping assembly 306 form the lower tooling assembly 3, and the whole lower tooling assembly 3 is fixed to the base 101, that is, the whole lower tooling assembly 3 is fixed to the support frame 1;

[0066] In the upper tooling assembly 2, the first tooling main body 202 and the lifting slide plate 201 are connected by bolts or rivets, etc., and the two are detachable;

[0067] In the lower tooling assembly 3, the second tooling main body 302 and the spacer block 301 are clamped and fixed by the clamping assembly 306, that is, the second tooling main body 302 and the spacer block 301 are detachable; In summary, during the actual detection process, according to the types, models, and sizes of the fluid connectors 5 to be detected, different first tooling main bodies 202 and second tooling main bodies 302 can be replaced to improve the overall adaptability of the equipment.

[0068] In some embodiments, such as Figure 1 and Figure 2 As shown, positioning posts 203 and positioning holes 303 are respectively arranged at corresponding positions in the first tooling main body 202 and the second tooling main body 302. When the first tooling main body 202 and the second tooling main body 302 are closed, the positioning post 203 can be inserted into the positioning hole 303, and there are at least two groups of the positioning post 203 and the positioning hole 303;

[0069] Since both the first tooling main body 202 and the second tooling main body 302 adopt a detachable and replaceable design, when they are disassembled and replaced, especially when the second tooling main body 302 has a large movement margin, it is very difficult to ensure that after re-assembly, the fluid connector 5 can have good sealing performance with the first installation groove 204 and the second installation groove 304 at the same time when the mold is closed. Therefore, the positioning post 203 and the positioning hole 303 are provided to ensure that after the first tooling main body 202 and the second tooling main body 302 are disassembled and assembled, they have a relatively stable relative position relationship;

[0070] At the same time, at least two groups of positioning posts 203 are adopted to make the second tooling main body 302 have a relatively complete degree of freedom limitation during installation, so as to ensure the accuracy of its installation position;

[0071] The specific installation sequence is as follows: First, fix the first tooling main body 202 and the lifting slide plate 201, and then close the first tooling main body 202 and the second tooling main body 302. During the process, the positioning post 203 is inserted into the positioning hole 303. At this time, the second tooling main body 302 obtains full positioning of six degrees of freedom. Therefore, at this time, the clamping assembly 306 is clamped and fixed to complete the installation of the second tooling main body 302.

[0072] In some embodiments, such as Figure 1As shown in the figure, an opposed photoelectric sensor 105 is provided at the front end of the base 101, and the opposed photoelectric sensor 105 is electrically connected to the control unit of the driving cylinder 104;

[0073] Among them, the opposed photoelectric sensor 105 is preferably a safety grating. When an operator replaces the fluid connector 5, the arm crosses the detection area of the safety grating, so that the safety grating generates a low-level signal. After receiving this signal, the control unit of the driving cylinder 104 controls the driving cylinder 104 to stop operating, avoiding personal injury caused by accidental mold clamping of the first tooling body 202 and the second tooling body 302; conversely, after the operator completes the replacement of the fluid connector 5, the arm does not block the detection area of the safety grating, and the safety grating generates a high-level signal. At this time, by pressing the switch, the driving cylinder 104 can drive the first tooling body 202 and the second tooling body 302 to clamp the mold, that is, ensuring production safety.

[0074] In this specification, each embodiment is described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. For the same or similar parts among the embodiments, reference can be made to each other.

[0075] The above has introduced the airtightness detection device provided by the present invention in detail. Specific examples are used in this article to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can still be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. An air tightness detection device for air tightness detection of a fluid connector (5), characterized in that: include: A first tooling body (202) is provided with a first mounting groove (204) therein for being assembled with the head end of the fluid connector (5) to form a first sealed cavity, wherein the first mounting groove (204) is connected to an external gas source via an air valve (401); A second tooling body (302) is provided with a second mounting groove (304) therein for being assembled with the end of the fluid connector (5) to form a second sealed cavity, wherein the second mounting groove (304) is connected to an external water storage tank (404) via an air guide tube (402); A driving cylinder (104), wherein both ends of the driving cylinder (104) are respectively connected to the first tooling body (202) and the second tooling body (302), and is used to drive the first tooling body (202) and the second tooling body (302) to engage in mold closing and demolding.

2. The airtightness detection device according to claim 1, characterized in that: A pressure gauge (403) is also provided in the first tooling body (202); a detection end of the pressure gauge (403) is connected to the first mounting groove (204); and the pressure gauge (403) is used to detect the gas pressure in the first sealed cavity.

3. The airtightness detection device according to claim 1, characterized in that: A first sealing ring (206) is provided at a contact position between the first mounting groove (204) and the fluid connector (5); and / or a second sealing ring (305) is provided at a contact position between the second mounting groove (304) and the fluid connector (5).

4. The airtightness detection device according to claim 1, characterized in that: A support block (205) is provided between the opposing surfaces of the first tooling body (202) and the second tooling body (302); when the first tooling body (202) and the second tooling body (302) are molded together, the opposing surfaces of the first tooling body (202) and the second tooling body (302) simultaneously abut against the support block (205).

5. The airtightness detection device according to claim 1, characterized in that: Also includes: A base (101) fixedly mounted on the second tooling body (302); A top plate (103) is fixedly mounted on the driving cylinder (104) and relatively fixed to the base (101), and the driving cylinder (104) is arranged vertically; The lifting slide plate (201) is fixedly mounted on the first tooling body (202), fixedly connected to the telescopic end of the driving cylinder (104), and slidably mounted on the base (101) and the top plate (103) via a vertical slide rail (102).

6. The airtightness detection device according to claim 5, characterized in that: A cushion block (301) is provided in the base (101), and the second tooling body (302) is placed on the surface of the cushion block (301) and fixed by a clamping assembly (306).

7. The airtightness detection device according to claim 6, characterized in that: Positioning columns (203) and positioning holes (303) are respectively arranged at corresponding positions in the first tooling body (202) and the second tooling body (302); when the first tooling body (202) and the second tooling body (302) are molded together, the positioning columns (203) can be inserted into the positioning holes (303); and there are at least two groups of positioning columns (203) and positioning holes (303).

8. The airtightness detection device according to any one of claims 5 to 7, characterized in that: A counter-beam photoelectric sensor (105) is provided at the front end of the base (101), and the counter-beam photoelectric sensor (105) is electrically connected to a control unit of the driving cylinder (104).

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