Leakage detection equipment

Abstract

The utility model discloses leak detection equipment, which relates to the technical field of casting detection and comprises a rack and a bottom plate, and a first sealing rubber ring is arranged on the bottom plate. A second sealing rubber ring is arranged on the positioning assembly, and an air cavity is formed in the positioning assembly; the plugging assembly is used for plugging the two through holes in the side wall of the casting cavity; the lifting driving piece can drive the vacuum cover to abut against the first sealing rubber ring, so that a first closed space is formed between the vacuum cover and the bottom plate, the pushing assembly is used for a casting, and a cavity and an air cavity of the casting form a second closed space; the vacuum generating device is used for enabling the first closed space and the second closed space to be in a vacuum state, the helium generating device is used for introducing helium into the gas cavity, and the helium detecting device is used for detecting helium in the first closed space. The leak detection equipment is beneficial to improving the air leakage detection efficiency of the casting.

Description

Technical Field

[0001] The utility model relates to the technical field of casting detection, in particular to a leakage detection device. Background Art

[0002] After casting, the casting needs to be sent to the leak detection equipment for leak detection. Before sending the casting to the leak detection equipment for leak detection, the operator needs to first use a plugging piece to block the through hole connected to the casting chamber, and then send the casting and the plugging piece together to the leak detection equipment for leak detection to ensure the accuracy and effectiveness of the leak detection. The method of using plugging pieces to block the through holes on the casting is slow, which is not conducive to improving the efficiency of leak detection of castings. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a leak detection device that can improve the efficiency of leak detection of castings.

[0004] The leak detection device according to the embodiment of the utility model comprises:

[0005] A frame, wherein the frame is provided with a bottom plate, and the bottom plate is provided with a first sealing rubber ring;

[0006] A positioning assembly, the positioning assembly is arranged on the bottom plate, the positioning assembly is arranged in the area surrounded by the first sealing rubber ring, the positioning assembly is provided with a second sealing rubber ring, the positioning assembly is provided with an air cavity, the air cavity is arranged in the area surrounded by the second sealing rubber ring, the positioning assembly is used to position the casting so that the second sealing rubber ring can support the casting and the cavity of the casting is connected with the air cavity;

[0007] A vacuum cover, a push assembly and a lifting drive, wherein the push assembly is arranged in the vacuum cover, the lifting drive is arranged on the frame, the lifting drive can drive the vacuum cover to descend and press against the first sealing rubber ring, so that a first closed space is formed between the vacuum cover and the bottom plate, and the push assembly is used to push the casting on the positioning assembly downward, so that the casting presses against the second sealing rubber ring, and the cavity of the casting and the air cavity form a second closed space;

[0008] A linear drive and a plugging assembly, wherein the plugging assembly is slidably disposed on the bottom plate, the plugging assembly is disposed in the area surrounded by the first sealing rubber ring, the linear drive is disposed in the vacuum cover, and the linear drive can drive the plugging assembly to approach the positioning assembly so that the plugging assembly plugs the two through holes on the side wall of the casting chamber;

[0009] A vacuum generating device, a helium generating device and a helium detecting device, wherein the vacuum generating device is used to make the first enclosed space and the second enclosed space both in a vacuum state, the helium generating device is used to introduce helium into the air cavity, and the helium detecting device is used to detect the helium content in the first enclosed space.

[0010] At least the following beneficial effects are achieved:

[0011] When it is necessary to detect air leakage on the casting, the operator can place the casting on the positioning assembly. Under the positioning action of the positioning assembly, the second sealing rubber ring on the positioning assembly can support the casting, so that the chamber of the casting is connected to the air cavity on the positioning assembly. Then the lifting drive drives the vacuum cover and the push assembly and the linear drive in the vacuum cover to descend, so that the vacuum cover presses against the first sealing rubber ring on the bottom plate, and a first enclosed space is formed between the vacuum cover and the bottom plate. At this time, the positioning assembly, the linear drive, the plugging assembly and the casting on the positioning assembly are all in the first enclosed space. As the vacuum cover continues to descend, the output end of the linear drive abuts against the plugging assembly, and then the linear drive drives the plugging assembly close to the positioning assembly. The plugging assembly can block the through hole on the side wall of the casting chamber, so that the two through holes on the casting that are connected to the chamber can be quickly blocked. As the vacuum hood descends, the pushing assembly in the vacuum hood can abut against the casting on the positioning assembly and push the casting downward, so that the casting presses against the second sealing rubber ring on the positioning assembly, thereby forming a second enclosed space between the chamber of the casting and the air cavity on the positioning assembly.

[0012] Then the vacuum generating device is started, and the vacuum generating device can make both the first confined space and the second confined space in a vacuum state. Then the helium generating device introduces helium into the air cavity, that is, introduces helium into the second confined space. Since the second confined space is in a vacuum state, the helium can diffuse rapidly in the second confined space. When there are pores in the casting, the helium in the second confined space can quickly pass through the pores on the casting and enter the first confined space. At this time, when the helium detection device can detect the increase in the helium content in the first confined space, it means that the casting has a leak and is an unqualified casting. When the helium detection device cannot detect the increase in the helium content in the first confined space, it means that the casting does not have a leak and is a qualified casting. The leak detection device can quickly block the two through holes on the casting that are connected to the chamber, shortening the leak detection cycle of the leak detection device, which is beneficial to improve the leak detection efficiency of the casting.

[0013] According to the leakage detection device of the embodiment of the utility model, the blocking assembly includes two blocking blocks and two rubber blocks, the two rubber blocks are respectively arranged on the side of the two blocking blocks facing the positioning assembly, the two blocking blocks are connected to the output end of the linear drive component, and the two blocking blocks can be pressed against the areas of the casting corresponding to the two through holes respectively, so that the two rubber blocks respectively extend into the two through holes on the casting and respectively press against the inner walls of the two through holes, and the two through holes are respectively blocked by the two rubber blocks.

[0014] According to the leak detection device of the embodiment of the utility model, the blocking assembly also includes a slide plate, which is slidably connected to the base plate, the slide plate is connected to the output end of the linear drive component, and the two blocking blocks are both arranged on the slide plate.

[0015] According to the leakage detection device of the embodiment of the utility model, the blocking assembly also includes two guide blocks, two first elastic members and two first guide rods, the two guide blocks are both arranged on the slide, guide holes are opened on the two guide blocks, the two first guide rods are respectively arranged on the side of the two blocking blocks away from the positioning assembly, the two first guide rods are respectively passed through the two guide holes, the two first elastic members are respectively sleeved on the two first guide rods, and the two blocking blocks are respectively connected to the two guide blocks through the two first elastic members.

[0016] According to the leak detection device of the embodiment of the utility model, the blocking component also includes two slide rails and two sliding blocks, the two slide rails are both arranged on the base plate, the two sliding blocks are both arranged on the sliding block, and the two sliding blocks can be slidably connected to the two slide rails respectively.

[0017] According to the leak detection device of the embodiment of the utility model, the positioning assembly includes a positioning block and a plurality of positioning columns, the positioning block is arranged on the base plate, the air cavity is opened on the positioning block, the second sealing rubber ring is arranged on the positioning block, a plurality of the positioning columns are arranged on the positioning block, a plurality of the positioning columns are distributed along the edge of the second sealing rubber ring, a plurality of the positioning columns are arranged on the outside of the second sealing rubber ring, and the area surrounded by the plurality of the positioning columns is used to accommodate the casting so that the second sealing rubber ring can support the casting.

[0018] The leak detection device according to the embodiment of the utility model further includes a marking component, which is arranged on the bottom plate, and the marking component is arranged in the area surrounded by the first sealing rubber ring. The marking component is electrically connected to the helium detection device, so that when the helium detection device detects an increase in the helium content in the first confined space, the marking component can mark the casting on the positioning component.

[0019] According to the leak detection equipment of the embodiment of the utility model, the marking assembly includes a cylinder and a striker, the cylinder body of the cylinder is arranged on the base plate, the piston rod of the cylinder is connected to the striker, and the cylinder can drive the striker to approach the positioning assembly so that the tip of the striker hits the casting on the positioning assembly and leaves a mark on the casting.

[0020] According to the leak detection device of the embodiment of the utility model, the positioning assembly includes multiple guide cylinders, multiple second elastic members and multiple pressure rods, the multiple guide cylinders are all arranged on the inner wall of the vacuum cover, the upper ends of the multiple pressure rods are respectively inserted into the multiple guide cylinders, the multiple second elastic members are respectively sleeved on the multiple pressure rods, the multiple pressure rods are respectively connected to the multiple guide cylinders through the second elastic members, and the lower ends of the multiple pressure rods are used to press against the casting on the positioning assembly so that the casting presses against the second sealing rubber ring.

[0021] The leak detection device according to the embodiment of the utility model further comprises a handheld air gun, and the gas sprayed by the handheld air gun is used to blow away the waste residue on the second sealing rubber ring.

[0022] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention is further described below with reference to the accompanying drawings and embodiments, wherein:

[0024] Figure 1 This is a schematic diagram of the structure of the casting of the utility model embodiment;

[0025] Figure 2 A schematic structural diagram of a casting from another perspective of an embodiment of the utility model;

[0026] Figure 3 This is a schematic diagram of the structure of the leakage detection device according to an embodiment of the utility model;

[0027] Figure 4 for Figure 3 A partial enlarged view of the middle A;

[0028] Figure 5 It is a structural schematic diagram of a positioning component, a blocking component and a marking component in the leak detection device of an embodiment of the utility model;

[0029] Figure 6 It is a structural schematic diagram of a positioning component, a plugging component, a marking component and a casting in the leak detection device of an embodiment of the utility model;

[0030] Reference numerals:

[0031] Frame 100; bottom plate 110; first exhaust hole 111; first sealing rubber ring 120; vacuum cover 130; lifting drive member 140;

[0032] Positioning assembly 200; positioning block 210; air cavity 211; positioning column 220; second sealing rubber ring 230;

[0033] Blocking assembly 300; guide block 310; blocking block 320; rubber block 330; slide plate 340; first elastic member 350; slide rail 360; slide block 370;

[0034] Marking assembly 400 ; cylinder 410 ; striker 420 . DETAILED DESCRIPTION

[0035] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0036] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0037] In the description of the present utility model, "a plurality" means more than two. If there is a description of "first" or "second", it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0038] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0039] refer to Figures 1 to 4 The leak detection device of the utility model embodiment includes:

[0040] A frame 100, a bottom plate 110 is disposed on the frame 100, and a first sealing rubber ring 120 is disposed on the bottom plate 110;

[0041] A positioning assembly 200, the positioning assembly 200 is arranged on the bottom plate 110, the positioning assembly 200 is arranged in the area surrounded by the first sealing rubber ring 120, the positioning assembly 200 is provided with a second sealing rubber ring 230, the positioning assembly 200 is provided with an air cavity 211, the air cavity 211 is arranged in the area surrounded by the second sealing rubber ring 230, and the positioning assembly 200 is used to position the casting so that the second sealing rubber ring 230 can support the casting and the cavity of the casting is connected with the air cavity 211;

[0042] The vacuum cover 130, the push assembly and the lifting drive 140, the push assembly is arranged in the vacuum cover 130, the lifting drive 140 is arranged on the frame 100, the lifting drive 140 can drive the vacuum cover 130 to descend and press against the first sealing rubber ring 120, so that a first closed space is formed between the vacuum cover 130 and the bottom plate 110, and the push assembly is used to push the casting on the positioning assembly 200 downward, so that the casting presses against the second sealing rubber ring 230, and the cavity of the casting and the air cavity 211 form a second closed space;

[0043] A linear drive and a plugging assembly 300, wherein the plugging assembly 300 is slidably disposed on the bottom plate 110, the plugging assembly 300 is disposed in the area enclosed by the first sealing rubber ring 120, the linear drive is disposed in the vacuum cover 130, and the linear drive can drive the plugging assembly 300 to approach the positioning assembly 200, so that the plugging assembly 300 plugs the two through holes on the side wall of the casting chamber;

[0044] A vacuum generating device, a helium generating device and a helium detecting device, wherein the vacuum generating device is used to make the first enclosed space and the second enclosed space both in a vacuum state, the helium generating device is used to introduce helium into the air cavity 211, and the helium detecting device is used to detect the helium in the first enclosed space.

[0045] It is understandable that when it is necessary to detect air leakage on the casting, the operator can place the casting on the positioning assembly 200. Under the positioning effect of the positioning assembly 200, the second sealing rubber ring 230 on the positioning assembly 200 can support the casting, so that the chamber of the casting is connected with the air cavity 211 on the positioning assembly 200. Then the lifting drive 140 drives the vacuum cover 130 and the push assembly and the linear drive member in the vacuum cover 130 to descend, so that the vacuum cover 130 presses against the first sealing rubber ring 120 on the bottom plate 110, and a first closed space is formed between the vacuum cover 130 and the bottom plate 110. At this time, the positioning assembly 200, the linear drive member, the plugging assembly 300 and the casting on the positioning assembly 200 are all in the first closed space. As the vacuum cover 130 continues to descend, the output end of the linear drive member abuts against the plugging assembly 300, and then the linear drive member drives the plugging assembly 300 to approach the positioning assembly 200, and the plugging assembly 300 can block the through holes on the side wall of the casting chamber, so that the two through holes on the casting that are connected to the chamber can be quickly blocked. As the vacuum cover 130 descends, the push assembly in the vacuum cover 130 can abut against the casting on the positioning assembly 200 and push the casting downward, so that the casting presses against the second sealing rubber ring 230 on the positioning assembly 200, so that the chamber of the casting and the air cavity 211 on the positioning assembly 200 form a second enclosed space. Then the vacuum generating device is started, and the vacuum generating device can make the first enclosed space and the second enclosed space both in a vacuum state. Then the helium generating device introduces helium into the air cavity 211, that is, introduces helium into the second enclosed space. Since the second confined space is in a vacuum state, helium can diffuse rapidly in the second confined space. When there are pores in the casting, the helium in the second confined space can quickly pass through the pores on the casting and enter the first confined space. At this time, when the helium detection device can detect the increase in the helium content in the first confined space, it means that the casting has a leak and is an unqualified casting. When the helium detection device cannot detect the increase in the helium content in the first confined space, it means that the casting has no leak and is a qualified casting. The leak detection device can quickly seal the two through holes on the casting that are connected to the chamber, shortening the leak detection cycle of the leak detection device, which is beneficial to improving the leak detection efficiency of the casting.

[0046] In an embodiment of the utility model, the helium detection device is a helium mass spectrometer, and the detection end of the helium mass spectrometer is arranged in the vacuum cover 130. The helium mass spectrometer is used to detect the helium content in the first confined space. When the casting causes helium to diffuse into the first confined space due to the presence of pores, the helium mass spectrometer can detect the rise of helium in the first confined space. Specifically, a preset helium content value is set in the helium mass spectrometer. During the continuous operation of the vacuum generating device, the helium mass spectrometer continuously measures the helium content in the first confined space. When the helium mass spectrometer detects that the helium content in the first confined space is equal to the preset helium content value, the vacuum generating device stops working. When there are pores on the casting, the high concentration of helium in the second confined space will quickly diffuse into the first confined space through the pores, so that the helium content in the first confined space will increase rapidly and exceed the preset helium content value. At this time, the helium mass spectrometer can determine that the casting is an unqualified casting.

[0047] For the convenience of explanation, in the present invention, the through hole on the casting refers to the hole on the casting that is connected to the casting cavity.

[0048] refer to Figure 4 and Figure 5 The blocking assembly 300 includes two blocking blocks 320 and two rubber blocks 330. The two rubber blocks 330 are respectively arranged on one side of the two blocking blocks 320 facing the positioning assembly 200. The two blocking blocks 320 are both connected to the output end of the linear drive component. The two blocking blocks 320 can be pressed against the areas of the two through holes of the casting respectively, so that the two rubber blocks 330 respectively extend into the two through holes on the casting and respectively press against the inner walls of the two through holes, and the two through holes are respectively blocked by the two rubber blocks 330. It can be understood that the linear drive component drives the two sealing blocks 320 to move toward the positioning assembly 200, so that the two sealing blocks 320 are respectively pressed against the areas corresponding to the two through holes on the casting. At this time, the rubber blocks 330 on the two sealing blocks 320 are respectively extended into the two through holes on the casting, and the two rubber blocks 330 are respectively squeezed against the inner walls of the two through holes, so that the two through holes on the casting can be respectively blocked and sealed by the two rubber blocks 330.

[0049] refer to Figure 4 and Figure 5 The blocking assembly 300 further includes a slide plate 340, which is slidably connected to the bottom plate 110, the slide plate 340 is connected to the output end of the linear drive, and the two blocking blocks 320 are both arranged on the slide plate 340. The blocking assembly 300 further includes two slide rails 360 and two sliders 370, the two slide rails 360 are both arranged on the bottom plate 110, the two sliders 370 are both arranged on the slide plate 340, and the two sliders 370 are slidably connected to the two slide rails 360, respectively.

[0050] refer to Figure 4 and Figure 5 The blocking assembly 300 further includes two guide blocks 310, two first elastic members 350 and two first guide rods. The two guide blocks 310 are both arranged on the slide plate 340. The two guide blocks 310 are both provided with guide holes. The two first guide rods are respectively arranged on the side of the two blocking blocks 320 away from the positioning assembly 200. The two first guide rods are respectively inserted into the two guide holes. The two first elastic members 350 are respectively sleeved on the two first guide rods. The two blocking blocks 320 are respectively connected to the two guide blocks 310 through the two first elastic members 350. It can be understood that the linear drive member drives the slide plate 340 to move toward the positioning assembly 200. Since the two blocking blocks 320 are respectively connected to the two guide blocks 310 through the two first elastic members 350, the two blocking blocks 320 and the two rubber blocks 330 can move toward the positioning assembly 200 together under the drive of the two first elastic members 350. After the two rubber blocks 330 respectively block the two through holes, the linear drive device continues to drive the slide plate 340 to move a certain distance toward the positioning assembly 200, so that the two first elastic members 350 are compressed. The compressed first elastic members 350 can provide a thrust force to the blocking block 320, so that the rubber block 330 can always maintain a pressure against the inner wall of the through hole, so as to ensure the sealing effect of the rubber block 330.

[0051] refer to Figures 4 to 6 The positioning assembly 200 includes a positioning block 210 and a plurality of positioning posts 220. The positioning block 210 is disposed on the bottom plate 110. The air cavity 211 is opened on the positioning block 210. The second sealing rubber ring 230 is disposed on the positioning block 210. The plurality of positioning posts 220 are all disposed on the positioning block 210. The plurality of positioning posts 220 are distributed along the edge of the second sealing rubber ring 230. The plurality of positioning posts 220 are all disposed on the outside of the second sealing rubber ring 230. The area formed by the plurality of positioning posts 220 is used to accommodate the casting so that the second sealing rubber ring 230 can support the casting. It can be understood that when the casting needs to be tested for air leakage, the casting can be placed in the area formed by the plurality of positioning posts 220. The plurality of positioning posts 220 have a positioning effect on the casting so that the casting can be accurately placed on the second sealing rubber ring 230.

[0052] When the linear drive drives the two sealing blocks 320 to press against the casting, and the two rubber blocks 330 respectively seal the two through holes, the two sealing blocks 320 and part of the positioning columns 220 clamp the casting, effectively preventing the casting from shaking during the leakage detection process and ensuring the stability of the detection process.

[0053] refer to Figure 5The leak detection device also includes a marking component 400, which is arranged on the bottom plate 110. The marking component 400 is arranged in the area surrounded by the first sealing rubber ring 120. The marking component 400 is electrically connected to the helium detection device, so that when the helium detection device detects helium in the first confined space, the marking component 400 can mark the casting on the positioning component 200. It can be understood that when the helium detection device detects helium in the first confined space, it means that there is a leak in the casting at this time, that is, it means that the casting is unqualified. At this time, the marking component 400 electrically connected to the helium detection device is started. The marking component 400 can mark the casting with a mark point so that the operator can accurately distinguish between qualified and unqualified castings. When the operator sees the presence of a mark point on the casting, it can be known that the current casting is an unqualified casting. When the operator does not see the presence of a mark point on the casting, it can be known that the current casting is a qualified casting.

[0054] The marking assembly 400 includes a cylinder 410 and a striker 420. The cylinder body of the cylinder 410 is disposed on the bottom plate 110. The piston rod of the cylinder 410 is connected to the striker 420. The cylinder 410 can drive the striker 420 to approach the positioning assembly 200 so that the tip of the striker 420 strikes the casting on the positioning assembly 200 and leaves a mark on the casting. After the tip of the striker 420 strikes the casting, a concave point will be formed on the casting, and the concave point is the mark.

[0055] As an embodiment of the utility model, the push assembly includes a plurality of guide cylinders, a plurality of second elastic members and a plurality of pressure rods. The plurality of guide cylinders are arranged on the inner wall of the vacuum cover 130. The upper ends of the plurality of pressure rods are respectively inserted into the plurality of guide cylinders. The plurality of second elastic members are respectively sleeved on the plurality of pressure rods. The plurality of pressure rods are respectively connected to the plurality of guide cylinders through the second elastic members. The lower ends of the plurality of pressure rods are used to press against the casting on the positioning assembly 200 so that the casting presses against the second sealing rubber ring 230. It can be understood that the lifting drive member 140 drives the vacuum cover 130 to descend. During the process of the vacuum cover 130 descending, the lower ends of the plurality of pressure rods can abut against the casting on the positioning assembly 200. As the vacuum cover 130 continues to descend, the plurality of second elastic members begin to compress. The compressed second elastic members can exert a downward force on the pressure rods, so that the plurality of pressure rods can push the casting downward, thereby pressing the casting against the second sealing rubber ring 230.

[0056] As an embodiment of the utility model, the leak detection equipment also includes a handheld air gun, and the gas ejected by the handheld air gun is used to blow away the waste slag on the second sealing rubber ring 230. It should be explained that in the process of smelting metal, pollutants or additives inside the furnace may also be mixed into the molten metal, and these pollutants will form surface waste slag after the casting is cooled. In the process of leak detection of the casting, waste slag may adhere to the second sealing rubber ring 230, thereby reducing the sealing effect of the second sealing rubber ring 230. It is understandable that before placing the casting on the positioning assembly 200, the operator will first use a handheld air gun to blow away the waste slag attached to the second sealing rubber ring 230, thereby ensuring the sealing effect of the second sealing rubber ring 230, and then ensuring the accuracy of the leakage detection of the casting.

[0057] In the embodiment of the utility model, a first exhaust hole 111 is provided on the bottom plate 110, and the first exhaust hole 111 is arranged in the area surrounded by the second sealing rubber ring 230. A second exhaust hole and an air inlet are provided on the bottom wall of the air cavity 211. The helium detection device includes a helium bottle, a pressure reducer, a flow control mechanism and a gas transmission pipeline, the gas inlet end and the gas outlet end of the gas transmission pipeline are respectively connected to the helium bottle and the gas inlet, and the pressure reducer and the flow control mechanism are both arranged on the gas transmission pipeline. High-purity helium is first stored in the helium bottle, and then enters the pressure reducer through the gas transmission pipeline, and the pressure reducer reduces the pressure of the helium to a working pressure suitable for use. The decompressed helium enters the flow control mechanism through the gas transmission pipeline, and the flow control mechanism accurately adjusts the helium flow rate to ensure that it enters the air cavity 211 on the injection positioning component 200 through the gas inlet at an appropriate flow rate.

[0058] In the embodiment of the utility model, the vacuum generating device includes a first vacuum generating mechanism and a second vacuum generating mechanism, the first vacuum generating mechanism is used to make the first enclosed space in a vacuum state, and the second vacuum generating mechanism is used to make the second enclosed space in a vacuum state. Specifically, the first vacuum generating mechanism includes a first vacuum pump and a first suction pipe, and the air inlet end of the first vacuum pump is connected to the first exhaust hole 111 on the bottom plate 110 through the first suction pipe. After the vacuum cover 130 is pressed against the first sealing rubber ring 120, the first vacuum pump is started, and the first vacuum pump continuously sucks the gas in the first enclosed space, so that the first enclosed space is in a vacuum state. The second vacuum generating mechanism includes a second vacuum pump and a second suction pipe, and the air inlet end of the second vacuum pump is connected to the second exhaust hole on the bottom wall of the air cavity 211 through the second suction pipe. After the casting is pressed against the second sealing rubber ring 230, the second vacuum pump is started, and the second vacuum pump continuously sucks the gas in the second enclosed space, so that the second enclosed space is in a vacuum state.

[0059] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0060] Of course, the present invention is not limited to the above-mentioned embodiments, and technicians familiar with the field may make equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A leak detection device, characterized in that: include: A frame, wherein the frame is provided with a bottom plate, and the bottom plate is provided with a first sealing rubber ring; A positioning assembly, the positioning assembly is arranged on the bottom plate, the positioning assembly is arranged in the area surrounded by the first sealing rubber ring, the positioning assembly is provided with a second sealing rubber ring, the positioning assembly is provided with an air cavity, the air cavity is arranged in the area surrounded by the second sealing rubber ring, the positioning assembly is used to position the casting so that the second sealing rubber ring can support the casting and the cavity of the casting is connected with the air cavity; A vacuum cover, a push assembly and a lifting drive, wherein the push assembly is arranged in the vacuum cover, the lifting drive is arranged on the frame, the lifting drive can drive the vacuum cover to descend and press against the first sealing rubber ring, so that a first closed space is formed between the vacuum cover and the bottom plate, and the push assembly is used to push the casting on the positioning assembly downward, so that the casting presses against the second sealing rubber ring, and the cavity of the casting and the air cavity form a second closed space; A linear drive and a plugging assembly, wherein the plugging assembly is slidably disposed on the bottom plate, the plugging assembly is disposed in the area surrounded by the first sealing rubber ring, the linear drive is disposed in the vacuum cover, and the linear drive can drive the plugging assembly to approach the positioning assembly so that the plugging assembly plugs the two through holes on the side wall of the casting chamber; A vacuum generating device, a helium generating device and a helium detecting device, wherein the vacuum generating device is used to make the first enclosed space and the second enclosed space both in a vacuum state, the helium generating device is used to introduce helium into the air cavity, and the helium detecting device is used to detect the helium content in the first enclosed space.

2. The leak detection device according to claim 1, characterized in that: The blocking assembly includes two blocking blocks and two rubber blocks. The two rubber blocks are respectively arranged on one side of the two blocking blocks facing the positioning assembly. The two blocking blocks are connected to the output end of the linear drive component. The two blocking blocks can be pressed against the areas of the casting corresponding to the two through holes, so that the two rubber blocks extend into the two through holes on the casting, respectively, and press against the inner walls of the two through holes, and the two through holes are blocked by the two rubber blocks.

3. The leak detection device according to claim 2, characterized in that: The blocking assembly also includes a slide plate, which is slidably connected to the bottom plate, and the slide plate is connected to the output end of the linear drive component, and the two blocking blocks are both arranged on the slide plate.

4. The leak detection device according to claim 3, characterized in that: The blocking assembly also includes two guide blocks, two first elastic members and two first guide rods. The two guide blocks are both arranged on the slide. Guide holes are opened on the two guide blocks. The two first guide rods are respectively arranged on the side of the two blocking blocks away from the positioning assembly. The two first guide rods are respectively inserted into the two guide holes. The two first elastic members are respectively sleeved on the two first guide rods. The two blocking blocks are respectively connected to the two guide blocks through the two first elastic members.

5. The leak detection device according to claim 3, characterized in that: The blocking component also includes two slide rails and two sliding blocks. The two slide rails are both arranged on the bottom plate, and the two sliding blocks are both arranged on the sliding block. The two sliding blocks can be slidably connected to the two slide rails respectively.

6. The leak detection device according to claim 1, characterized in that: The positioning assembly includes a positioning block and a plurality of positioning columns, the positioning block is arranged on the base plate, the air cavity is opened on the positioning block, the second sealing rubber ring is arranged on the positioning block, a plurality of the positioning columns are arranged on the positioning block, a plurality of the positioning columns are distributed along the edge of the second sealing rubber ring, a plurality of the positioning columns are arranged on the outside of the second sealing rubber ring, and an area surrounded by the plurality of positioning columns is used to accommodate the casting so that the second sealing rubber ring can support the casting.

7. The leak detection device according to claim 1, characterized in that: It also includes a marking component, which is arranged on the bottom plate and in the area surrounded by the first sealing rubber ring. The marking component is electrically connected to the helium detection device, so that when the helium detection device detects that the helium content in the first enclosed space increases, the marking component can mark the casting on the positioning component.

8. The leak detection device according to claim 7, characterized in that: The marking assembly includes a cylinder and a striker, wherein the cylinder body of the cylinder is arranged on the base plate, the piston rod of the cylinder is connected to the striker, and the cylinder can drive the striker to approach the positioning assembly so that the tip of the striker strikes the casting on the positioning assembly and leaves a mark on the casting.

9. The leak detection device according to claim 1, characterized in that: The positioning assembly includes multiple guide cylinders, multiple second elastic members and multiple pressure rods. The multiple guide cylinders are all arranged on the inner wall of the vacuum cover. The upper ends of the multiple pressure rods are respectively inserted into the multiple guide cylinders. The multiple second elastic members are respectively sleeved on the multiple pressure rods. The multiple pressure rods are respectively connected to the multiple guide cylinders through the second elastic members. The lower ends of the multiple pressure rods are used to press against the casting on the positioning assembly so that the casting presses against the second sealing rubber ring.

10. The leak detection device according to claim 1, characterized in that: It also includes a handheld air gun, and the gas sprayed by the handheld air gun is used to blow away the waste residue on the second sealing rubber ring.

Images