Immersion type air tightness detection machine

Abstract

The utility model discloses a water immersion type air tightness detection machine, which is characterized by comprising a rack, a water tank and a detection tool, the water tank is arranged on the rack through a lifting driving mechanism; the detection tool comprises a tool plate, two flat hole plugging mechanisms, an inclined hole plugging mechanism, a cover pressing mechanism and a detection mechanism. A positioning pin for positioning a workpiece is arranged on the tool plate; the two flat hole plugging mechanisms are respectively used for plugging two flat holes of a workpiece; the inclined hole plugging mechanism is used for plugging two inclined holes of the workpiece; the capping and pressing mechanism is used for capping and pressing the upper end opening of the workpiece; the detection mechanism comprises an inflation head which is used for blocking a spigot of a workpiece. The inflation head is connected with an air supply source through a pipeline. According to the utility model, air tightness inspection after the workpiece is soaked in water can be realized, the air tightness of the workpiece can be judged, which part leaks air can be judged, and support can be provided for later repair of the air leakage part and prevention of production defects.

Description

Technical Field

[0001] The utility model relates to a water-immersion airtightness detection machine. Background Art

[0002] See also Figure 1-2 It is a connecting seat (belonging to the existing known workpiece), which is a box structure, and the upper and lower end faces of the connecting seat are provided with a number of connecting holes N-1, and the side wall of the connecting seat is provided with two flat holes N-2, two inclined holes N-3, an upper port N-4, a lower port and a stopper N-5. After the connecting seat is machined, it is necessary to test its air tightness to detect the air tightness defects of the product, such as leakage, cracks, etc., to detect whether there are quality problems. The conventional air tightness detection machine uses the method of sealing each orifice of the box body, and then inflating and detecting the air pressure change to judge the air tightness (that is, connecting one of the orifices of the box body to the air tightness detector). When the existing air tightness detection machine is used for connecting seat detection, although it can detect the sealing of the product (that is, whether there is a leak). However, if it is found that the product has a leak during the detection of the connecting seat, it is impossible to determine which part of the leak has occurred, and thus it is impossible to provide support for the later repair of the leaking part and the prevention of production defects. Utility Model Content

[0003] The utility model provides a water-immersion airtightness detection machine to solve the problem that the existing airtightness detection machine cannot determine the leakage position when used for the airtightness detection of the connection seat.

[0004] In order to achieve the above-mentioned purpose, the scheme of the utility model is: an immersion airtightness detection machine, characterized in that: it includes a frame, a water tank and a detection tool; the water tank is arranged on the frame through a lifting drive mechanism; the detection tool is arranged on the frame and corresponds to the position of the water tank; the detection tool includes a tool plate, two flat hole sealing mechanisms, an inclined hole sealing mechanism, a covering and pressing mechanism and a detection mechanism; the tool plate is provided with positioning pins for positioning the workpiece; the two flat hole sealing mechanisms are respectively used for sealing the two flat holes of the workpiece; the inclined hole sealing mechanism is used for sealing the two inclined holes of the workpiece; the covering and pressing mechanism is used for sealing and pressing the upper port of the workpiece; the detection mechanism includes an inflation head, which is used to block the stopper of the workpiece; the inflation head is connected to the air supply source through a pipeline; and a connecting hole is provided in the inflation head to connect the stopper of the workpiece with the pipeline.

[0005] Before testing, first fill the water tank with water or other transparent liquids; then place the lower end surface of the workpiece (connecting seat) flat on the upper surface of the tooling plate to form a surface contact seal, and position the connecting hole on the lower end surface of the workpiece in cooperation with the positioning pin; then start the two flat hole blocking mechanisms to block the two flat holes of the workpiece respectively, start the inclined hole blocking mechanism to block the two inclined holes of the workpiece, start the cover pressing mechanism to cover and press the upper port of the workpiece tightly; then install the inflatable head plug in the stopper of the workpiece, and then start the lifting drive mechanism to drive the water tank to move upward until the water (or other transparent liquid) in the water tank completely submerges the workpiece; then provide a certain pressure of gas to the inside of the workpiece through the air supply source. If bubbles are found around the workpiece in the water tank, it means that there is a leakage problem, and the workpiece is unqualified; at the same time, the position of the bubbles on the workpiece can be observed to directly find the leakage location, which is very simple and convenient. If no bubbles are generated around the workpiece in the above water tank, it means that there is no leakage problem and the workpiece is qualified.

[0006] When the workpiece inspection is completed, the lifting drive mechanism is started again to drive the water tank to move downward and into place. At this time, the water tank is a certain distance below the tooling plate; then wait for the water (or other transparent liquid) on the workpiece on the inspection tooling to drip dry or a small amount, then loosen and remove the workpiece on the inspection tooling, and then install the next workpiece to continue inspection.

[0007] Therefore, the technical solution solves the problem that the existing air tightness detection machine cannot determine the leakage position when used for the air tightness detection of the above-mentioned connection socket.

[0008] In addition, during testing, the present technical solution uses a lifting drive mechanism to drive the water tank to rise and fall, rather than using a driving test fixture to rise and fall. Since the fixture plate of the test fixture is always in a stationary state, it can ensure that the clamping state of the workpiece on the test fixture is always stable during the air tightness test, and avoid the workpiece from moving up and down and causing looseness, shaking or vibration, thereby affecting the air tightness test results.

[0009] Furthermore, there are multiple positioning pins.

[0010] Furthermore, the flat hole plugging mechanism includes a first support, a first driving cylinder and a flat hole plug; the first support is fixed on the tooling plate, the first driving cylinder is horizontally installed on the first support, and the flat hole plug is installed on the output end of the first driving cylinder.

[0011] Furthermore, the inclined hole sealing mechanism includes a second support, a second driving cylinder and an inclined hole plug; the second support is fixed on the tooling plate, the second driving cylinder is obliquely installed on the second support, and two parallel and spaced inclined hole plugs are installed at the output end of the second driving cylinder.

[0012] Furthermore, the lifting drive mechanism includes two lifting drive cylinders; the two lifting drive cylinders are distributed in parallel and installed on the frame; the output ends of the two lifting drive cylinders are vertically downward and are fixedly connected to both sides of the outer wall of the water tank respectively.

[0013] Furthermore, the cover pressing mechanism includes a boosting cylinder and a cover plate; the boosting cylinder is installed on a frame; the output end of the boosting cylinder is vertically downward and fixedly connected to the cover plate; an elastic pad is provided on the lower surface of the cover plate.

[0014] Furthermore, the water tank is made of transparent material.

[0015] Furthermore, the detection mechanism also includes a third driving cylinder, and an output end of the third driving cylinder is connected to the inflation head.

[0016] Beneficial effects of the utility model:

[0017] First, the utility model can realize the air tightness inspection of the workpiece after immersion in water, which is convenient for observation and accurate in judging the test result; and because the water immersion inspection is performed by driving the lifting movement of the water tank instead of the lifting movement of the detection tooling, the stability of the tooling clamping and testing state can be ensured to avoid looseness;

[0018] Second, the utility model can not only judge the air tightness of the workpiece, but also judge where the leak occurs when the product is found to have air leakage, and can provide support for the later repair of the leaking part and the prevention of production defects;

[0019] Third, the utility model works through two hole blocking mechanisms and automatically blocks the two flat holes of the workpiece respectively, works through the inclined hole blocking mechanism and automatically blocks the two inclined holes of the workpiece, and works through the cover pressing mechanism and automatically covers and presses the upper port of the workpiece, which has high clamping efficiency and can ensure the stability and consistency of the detection conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1-2 It is a structural schematic diagram of a current connecting socket.

[0021] Figure 3-4 The utility model is a working schematic diagram of an immersion type airtightness detection machine when it is clamped in place but its water tank is at a low position.

[0022] Figure 5 yes Figure 3 Enlarged view of point A in the middle.

[0023] Figure 6-7 The utility model is a working schematic diagram of a water-immersed airtightness detection machine when a water tank is moved upward and a gas supply source is started to provide a certain pressure gas for detection.

[0024] Figure 8 yes Figure 6Enlarged view of point B in the middle.

[0025] Figure 9-10 It is a working schematic diagram of the workpiece on the detection fixture when it is not blocked.

[0026] Fig.11 It is a working schematic diagram of the workpiece on the detection fixture when it is sealed in place. DETAILED DESCRIPTION

[0027] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0028] Example 1: See Figure 3-11 , an immersion type air tightness testing machine, which includes a frame 1, a water tank 2 and a testing tool 3.

[0029] The water tank 2 is arranged on the frame 1 through a lifting drive mechanism, and the lifting drive mechanism is used to drive the water tank 2 to move up and down.

[0030] The detection tool 3 is arranged on the frame 1 and corresponds to the position of the water tank 2. Figure 3-5 In normal state, the detection tool 3 is located directly above the water tank 2; during detection, the water tank 2 can be driven upward by the lifting drive mechanism, as shown in FIG. Figure 6-9 The workpiece clamped on the detection fixture 3 can be completely submerged by the water or other transparent liquid in the water tank 2.

[0031] Among them, see Figure 5 The detection tool 3 includes a tool plate 3-1, two flat hole blocking mechanisms 3-2, an inclined hole blocking mechanism 3-3, a covering and pressing mechanism 3-4 and a detection mechanism 3-5.

[0032] In this embodiment, the tooling plate 3-1 is fixed on the frame 1. Figure 4 Preferably, the four corners of the tooling plate 3-1 are fixedly connected to the frame through four columns 3-7. When clamping, the lower end surface of the workpiece connection seat is placed flat on the upper surface of the tooling plate 3-1 and is in surface contact and sealed.

[0033] In addition, an elastic layer or a rubber pad is provided on the upper surface of the tooling plate 3 - 1 to improve the sealing performance during surface contact.

[0034] In this embodiment, see Figure 5 , the tooling plate 3-1 is provided with a positioning pin 3-6 for positioning the workpiece;

[0035] Furthermore, a plurality of positioning pins 3-6, such as 2-3, are fixedly mounted on the tooling plate 3-1. Figure 5During clamping, the positioning pins 3-6 are matched one by one with the connecting holes N-1 on the lower end surface of the workpiece for positioning.

[0036] Among them, see Figure 9-11 The two flat hole blocking mechanisms 3-2 are respectively used for blocking the two flat holes N-2 of the workpiece.

[0037] In this embodiment, see Figure 3-5 The two flat hole plugging mechanisms 3-2 each include a first support 3-21, a first drive cylinder 3-22 and a flat hole plug 3-23; the first support 3-21 is fixed on the tooling plate 3-1, the first drive cylinder 3-22 is horizontally mounted on the first support 3-21, and the flat hole plug 3-23 is mounted on the output end of the first drive cylinder 3-22. When plugging, the first drive cylinder 3-22 drives the flat hole plug 3-23 to move toward the flat hole N-2 of the workpiece and partially or completely insert it to complete automatic plugging.

[0038] Preferably, the flat hole plug 3-23 is made of elastic material, such as rubber.

[0039] Among them, see Figure 9-11 The inclined hole blocking mechanism 3-3 is used for blocking two inclined holes N-3 of the workpiece.

[0040] In this embodiment, see Figure 3-5 and Figure 9-11 The oblique hole plugging mechanism 3-3 includes a second support 3-31, a second drive cylinder 3-32 and an oblique hole plug 3-33; the second support 3-31 is fixed on the tooling plate 3-1, the second drive cylinder 3-32 is fixedly installed on the second support 3-31 at an angle, and two oblique hole plugs 3-33 are installed at the output end of the second drive cylinder 3-32 and are distributed in parallel and spaced apart. When plugging, the second drive cylinder 3-32 drives the two oblique hole plugs 3-33 to move toward the two oblique holes N-3 of the workpiece respectively and partially or completely insert them to complete the automatic plugging of the double oblique holes.

[0041] Among them, see Figure 3-5 and Figure 9-11 The capping and pressing mechanism 3-4 is used to seal and press the upper port N-4 of the workpiece.

[0042] In this embodiment, see Figure 3-5 and Figure 9-11The cover pressing mechanism 3-4 includes a boosting cylinder 3-41 and a cover plate 3-42; the boosting cylinder 3-41 is fixedly mounted on the frame 1; the output end of the boosting cylinder 3-41 is vertically downward and fixedly connected to the cover plate 3-42; an elastic pad 3-43 is provided on the lower surface of the cover plate 3-42. When the cover is pressed, the boosting cylinder 3-41 drives the cover plate 3-42 to move downward and press tightly on the upper port N-4 of the workpiece to achieve automatic cover pressing. Since the elastic elastic pad 3-43 is used to contact and press the upper port N-4 of the workpiece to seal, the sealing performance during surface contact can be improved. Specifically, the elastic pad 3-43 is made of rubber.

[0043] In this embodiment, see Figure 6-8 and Figure 9-11 When clamping, the inflation head 3-51 is manually plugged into the stopper N-5 of the workpiece. During testing, the inflation head 3-51 is provided with a connecting hole 3-511 that connects the stopper of the workpiece with the pipeline 3-52. The gas supply source 3-53 can be used to start the work, and a certain pressure of gas can enter the inner cavity of the workpiece through the pipeline 3-52, the connecting hole 3-511, and the stopper N-5 in sequence.

[0044] Among them, see Figure 4-6 The lifting drive mechanism includes two lifting drive cylinders 4; the two lifting drive cylinders 4 are parallelly spaced and fixedly installed on the frame 1; the output ends of the two lifting drive cylinders 4 are vertically downward and are respectively fixedly connected to the two sides of the outer wall of the water tank 2. Furthermore, the water tank 2 is made of transparent material. The telescopic movement of the output ends of the two lifting drive cylinders 4 drives the lifting of the water tank 2. Due to the driving on both sides, the lifting is very stable, and the load capacity can be improved, and the performance requirements can be met.

[0045] Before testing, first fill the water tank 2 with water or other transparent liquid; then place the lower end surface of the workpiece connection seat flat on the upper surface of the tooling plate 3-1 to form a surface contact seal, and make the connection hole N-1 on the lower end surface of the workpiece cooperate with the positioning pin 3-6 to position; then start the two flat hole blocking mechanisms 3-2 to work and block the two flat holes N-2 of the workpiece respectively, start the inclined hole blocking mechanism 3-3 to work and block the two inclined holes N-3 of the workpiece, start the cover pressing mechanism 3-4 to work and cover and press the upper port N-4 of the workpiece; then install the inflation head 3-51 plug in the stopper N-5 of the workpiece (see Figure 3-5 ), then start the lifting drive mechanism to work and drive the water tank 2 to move upward until the water or other transparent liquid in the water tank 2 completely submerges the workpiece (see Figure 6-8); then, when a certain pressure of gas is provided to the inside of the workpiece through the gas supply source 3-53, if bubbles are found around the workpiece in the water tank 2, it means that there is a leakage problem, and the workpiece is unqualified; at the same time, the position of the bubbles on the workpiece can be observed to directly find the leakage position, which is very simple and convenient. If no bubbles are generated around the workpiece in the water tank 2, it means that there is no leakage problem, and the workpiece is qualified.

[0046] When the workpiece inspection is completed, the lifting drive mechanism can be started again to drive the water tank 2 to move downward and into place. At this time, the water tank 2 is a certain distance lower than the tooling plate 3-1; then wait for the water or other transparent liquid on the workpiece on the inspection tooling 3 to drip dry or a small amount, then loosen and remove the workpiece on the inspection tooling 3, and then install the next workpiece to continue inspection.

[0047] Therefore, this embodiment solves the problem that the existing air tightness detection machine cannot determine the leakage position when used for the air tightness detection of the above-mentioned connection socket.

[0048] In addition, during the inspection, the present embodiment adopts a lifting drive mechanism to drive the water tank 2 to rise and fall, rather than driving the inspection tool 3 to rise and fall. Since the tool plate 3-1 of the inspection tool 3 is always in a stationary state, it can ensure that the clamping state of the workpiece on the inspection tool 3 is always stable during the air tightness inspection, and can avoid the workpiece from moving up and down to cause looseness, shaking or vibration, thereby affecting the air tightness inspection result.

[0049] Embodiment 2: This embodiment is basically the same as Embodiment 1, except that: the detection mechanism 3-5 includes an inflation head 3-51 and a third drive cylinder 3-54, the output end of the third drive cylinder 3-54 is connected to the inflation head 3-51; the inflation head 3-51 is used to block the stopper of the workpiece; the inflation head 3-51 is connected to the air supply source 3-53 through a pipe 3-52; a connecting hole 3-511 is provided in the inflation head 3-51 for connecting the stopper of the workpiece with the pipe 3-52.

[0050] Specifically, the third driving cylinder 3-54 can be horizontally fixed on the second support 3-31 or the tooling plate 3-1.

[0051] During clamping, this embodiment specifically drives the third drive cylinder 3-54 to work and drives the inflation head 3-51 to move toward the stop N-5 of the workpiece and partially or completely insert it to complete automatic installation, which replaces the manual installation used in Example 1.

[0052] Compared with the first embodiment, the present embodiment can automatically insert and withdraw the plugging through the third drive cylinder 3-54, which can reduce manual inspection, while ensuring the stability of the plugging force during insertion, and avoiding the possible problem of large or small force caused by manual labor.

[0053] Preferably, the first drive cylinder 3-22, the second drive cylinder 3-32 and the third drive cylinder 3-54 are hydraulic telescopic cylinders, which can avoid interference caused by bubbles in the pneumatic telescopic cylinders when leaking.

[0054] The preferred specific embodiments of the utility model are described in detail above. It should be understood that ordinary technicians in this field can make many modifications and changes based on the concept of the utility model without creative work. Therefore, all technical solutions that can be obtained by technicians in this technical field based on the concept of the utility model through logical analysis, reasoning or limited experiments on the basis of the existing technology should be within the scope of protection determined by the claims.

Claims

1. An immersion airtightness detection machine, characterized in that: It comprises a frame (1), a water tank (2) and a detection tool (3); The water tank (2) is arranged on the frame (1) via a lifting drive mechanism; the detection tool (3) is arranged on the frame (1) and corresponds to the position of the water tank (2); The detection tool (3) comprises a tool plate (3-1), two flat hole blocking mechanisms (3-2), an inclined hole blocking mechanism (3-3), a covering and pressing mechanism (3-4) and a detection mechanism (3-5); The tooling plate (3-1) is provided with a positioning pin (3-6) for positioning a workpiece; The two flat hole blocking mechanisms (3-2) are respectively used for blocking two flat holes of a workpiece; The inclined hole blocking mechanism (3-3) is used for blocking two inclined holes of a workpiece; the capping and pressing mechanism (3-4) is used for capping and pressing the upper end of the workpiece; The detection mechanism (3-5) comprises an air filling head (3-51), and the air filling head (3-51) is used to block the stopper of the workpiece; the air filling head (3-51) is connected to an air supply source (3-53) via a pipeline (3-52); and a connecting hole (3-511) is provided in the air filling head (3-51) for connecting the stopper of the workpiece with the pipeline (3-52).

2. The submersible airtightness testing machine according to claim 1, characterized in that: There are a plurality of positioning pins (3-6).

3. The submerged airtightness testing machine according to claim 1, characterized in that: The flat hole plugging mechanism (3-2) comprises a first support (3-21), a first driving cylinder (3-22) and a flat hole plug (3-23); the first support (3-21) is fixed on the tooling plate (3-1), the first driving cylinder (3-22) is horizontally mounted on the first support (3-21), and the flat hole plug (3-23) is mounted on the output end of the first driving cylinder (3-22).

4. The submerged airtightness testing machine according to claim 1, characterized in that: The inclined hole plugging mechanism (3-3) comprises a second support (3-31), a second driving cylinder (3-32) and an inclined hole plug (3-33); the second support (3-31) is fixed on the tooling plate (3-1), the second driving cylinder (3-32) is obliquely mounted on the second support (3-31), and the output end of the second driving cylinder (3-32) is mounted with two parallel and spaced inclined hole plugs (3-33).

5. The submerged airtightness testing machine according to claim 1, characterized in that: The lifting drive mechanism comprises two lifting drive cylinders (4); the two lifting drive cylinders (4) are distributed in parallel and spaced apart and are installed on the frame (1); the output ends of the two lifting drive cylinders (4) face vertically downward and are respectively fixedly connected to two sides of the outer wall of the water tank (2).

6. The submerged airtightness testing machine according to claim 1, characterized in that: The cover pressing mechanism (3-4) comprises a boosting cylinder (3-41) and a cover plate (3-42); the boosting cylinder (3-41) is mounted on the frame (1); the output end of the boosting cylinder (3-41) faces vertically downward and is fixedly connected to the cover plate (3-42); and an elastic pad (3-43) is provided on the lower surface of the cover plate (3-42).

7. The submerged airtightness testing machine according to claim 1, characterized in that: The water tank (2) is made of transparent material.

8. The submerged airtightness testing machine according to claim 1 or 4, characterized in that: The detection mechanism (3-5) further comprises a third driving cylinder (3-54), and an output end of the third driving cylinder (3-54) is connected to the inflation head (3-51).

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