Casing leakproofness detection tool
By using a water channel and slider design in the housing airtightness testing fixture, the problem of high testing cost in the prior art is solved, the accuracy and versatility of housing airtightness testing are achieved, and the testing cost is reduced.
Patent Information
- Application Number
- CN202520233916.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-14
- Publication Date
- 2025-12-19
- Estimated Expiration
- 2035-02-14
AI Technical Summary
Existing methods for testing the airtightness of housings require the use of an airtightness testing instrument, resulting in high testing costs and complex maintenance, making it difficult to reduce costs while ensuring accuracy.
A housing airtightness testing fixture is used. Water channels are opened on the outer surface of the casing, and a sealed chamber is formed by the water inlet pipe and the water outlet pipe. The airtightness of the housing is judged by observing whether water leaks. The fixture is combined with a movable slider and groove design to accommodate housings of different sizes.
It achieves accuracy and comprehensiveness in casing airtightness testing, reduces testing costs, and improves the versatility and flexibility of testing tooling, thus avoiding missed detections.
Smart Images
Figure CN223691953U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of the detection of the airtightness of a machine shell, and particularly relates to a detection tool for the airtightness of a machine shell. BACKGROUND
[0002] In the detection of the airtightness of a machine shell, a pressure decay method is usually used. This method involves filling the machine shell with a gas at a certain pressure and then observing the decay of the pressure to determine whether the machine shell is leaking. If the decay rate of the pressure is less than a specified threshold, the machine shell is considered to be sealed well; otherwise, the machine shell is considered to be leaking.
[0003] However, when the pressure decay method is used to detect the airtightness of a machine shell, a gas-tightness detector is usually required. Although the gas-tightness detector can improve the accuracy and efficiency of the detection, its purchase cost is relatively high, which increases the cost of the detection of the airtightness of the machine shell. In addition, in order to ensure the stability of the gas-tightness detector and the reliability of the detection results, professional personnel need to calibrate and maintain the gas-tightness detector regularly, which further increases the overall cost of the detection. SUMMARY
[0004] The utility model aims to provide a detection tool for the airtightness of a machine shell, which can ensure the accuracy of the detection results and reduce the overall cost of the detection process.
[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical solutions:
[0006] 1) A detection tool for the airtightness of a machine shell, comprising a base, the base being provided with a fixing column for fixing the machine shell, the outer surface of the fixing column being provided with a sleeve, the outer surface of the sleeve being provided with a water channel forming a sealed chamber with the inner surface of the machine shell, the base being provided with a water inlet pipe and a water outlet pipe, the end of the water inlet pipe corresponding to the starting position of the water channel, the water inlet pipe being in communication with the sealed chamber during use, the end of the water outlet pipe corresponding to the end position of the water channel, the water outlet pipe being in communication with the sealed chamber during use.
[0007] The utility model discloses a fixing column is equipped on the base for fixing the casing, can ensure that the casing keeps stable in the airtightness detection process. The outer surface of fixing column is sleeved with the sleeve pipe, and the outer surface of sleeve pipe is provided with water channel, and the water channel can form the airtight chamber with the inner surface of casing. The airtightness of casing is detected by injecting water into the airtight chamber. In the airtightness detection process of casing, the injection pipe is communicated with the starting position of water channel, and the outlet pipe is communicated with the terminal position of water channel. Water is injected into the airtight chamber through the injection pipe, and along with the continuous injection of water, the water flow starts to flow along the direction of water channel, gradually fills each part of airtight chamber, until the whole airtight chamber is completely filled with water, thereby comprehensively covering the detection part of casing. At this time, if the airtightness of casing is good, the water flow will not leak from other parts of casing, but only be discharged through the outlet pipe. The outlet pipe can discharge the water in the airtight chamber, and at the same time, ensure that the water flow can smoothly pass through the whole water channel, thereby verifying the integrity of airtight chamber.
[0008] In this process, the detection personnel can judge the airtightness of casing by observing whether water leaks from other parts of casing. If it is found that water leaks from a part of casing during the detection process, it indicates that there is a leakage point in the part; if only the outlet pipe has water flow, it indicates that the airtightness of casing is good and there is no leakage. Finally, the water in the airtight chamber is discharged through the outlet pipe. This detection method can use a simple and effective method to detect the airtightness of casing, improve the accuracy of casing airtightness detection result, and at the same time, reduce the detection cost.
[0009] 2) The casing airtightness detection tool according to 1), wherein:
[0010] The water channel is annular and is arranged on the outer surface of the sleeve pipe.
[0011] In the utility model, the water channel is annular and is arranged on the outer surface of the sleeve pipe, and the position of the water channel corresponds to the detection area of the casing. After the water flow is injected into the airtight chamber, the water flow flows along the annular water channel and can uniformly cover each part of the airtight chamber, thereby ensuring that the detection area of the casing is completely covered. This design can avoid the missed detection during the casing airtightness detection process, thereby improving the comprehensiveness and accuracy of detection.
[0012] 3) The casing airtightness detection tool according to 1), wherein:
[0013] A plurality of sliding blocks for fixing the casing are slidably connected to the upper surface of the base, a plurality of strip-shaped sliding holes are formed in the sliding blocks, the sliding blocks can move along the axis direction of the sliding holes, a plurality of bolts are arranged in the sliding holes, a plurality of threaded holes are formed in the base, the position of each threaded hole corresponds to the position of a bolt, and the bolts pass through the sliding holes and are screwed with the threaded holes.
[0014] The utility model discloses, the base is slidably connected with several sliding blocks, is used for fixing the casing in the casing airtightness detection process, avoids the inaccurate result caused by the unstable casing. The sliding hole of strip shape is seted up on the sliding block, and the sliding block can move on the upper surface of the base along the axis direction of sliding hole. The operator can flexibly adjust the position of sliding block according to the size of casing, makes it and the casing close contact through the movement of sliding block, thereby realizes the fixation of different size casing. The movability of sliding block improves the versatility and flexibility of casing airtightness detection frock, makes it can adapt to multiple specifications of casing. After the position of sliding block is adjusted, through the bolt is passed through the sliding hole and is screwed with the threaded hole on the base, thereby fixes the sliding block on the base, ensures that it keeps stable in the detection process.
[0015] 4) The casing airtightness detection frock according to 1), wherein:
[0016] The side wall of the water injection pipe is provided with a water injection port for injecting water into the water injection pipe. The end of the water injection pipe away from the fixed column is connected with a gas cylinder. The gas cylinder is used to drive the water injection pipe to move in the direction of approaching or moving away from the fixed column. The gas cylinder is connected with an electromagnetic valve for controlling the extension and retraction of the gas cylinder. The electromagnetic valve is connected with an air compressor for providing compressed air.
[0017] In the utility model, the internal space of the gas cylinder is divided into two air chambers by the telescopic rod inside the gas cylinder. The electromagnetic valve is in communication with the air chamber at the top of the gas cylinder through the first pipeline, forming a first air path. The electromagnetic valve is in communication with the air chamber at the bottom of the gas cylinder through the second pipeline, forming a second air path. The electromagnetic valve controls the movement of the valve core through the magnetic field generated by the conductive coil, thereby controlling the switching of the first air path and the second air path, and realizing the control of the movement of the telescopic rod inside the gas cylinder.
[0018] When the telescopic rod inside the gas cylinder needs to move outward, the valve core in the electromagnetic valve moves, making the compressed air in communication with the first air path. The compressed air enters the air chamber at the top of the gas cylinder through the first air path. As the compressed air continues to fill, the pressure in the air chamber at the top of the gas cylinder gradually increases, and the telescopic rod inside the gas cylinder moves outward under the action of the compressed air pressure. At the same time, the compressed air in the air chamber at the bottom of the gas cylinder is squeezed into the electromagnetic valve and then discharged through the electromagnetic valve. The movement of the telescopic rod in the gas cylinder drives the water injection pipe to move in the direction of approaching the fixed column until the end of the water injection pipe is in communication with the sealed chamber. Then, water is injected into the water injection pipe through the water injection port, and the water injection pipe introduces water into the sealed chamber, thereby starting the airtightness test of the casing.
[0019] After the sealing test of the casing is completed, the compressed air is communicated with the second gas path by moving the valve core of the electromagnetic valve, and the compressed air enters the air cavity at the bottom of the cylinder through the second gas path. With the continuous filling of compressed air, the pressure in the air cavity at the bottom of the cylinder gradually increases, and the telescopic rod in the cylinder moves under the action of the compressed air pressure. At the same time, the compressed air in the air cavity at the top of the cylinder is extruded into the electromagnetic valve and then discharged through the electromagnetic valve. The movement of the telescopic rod in the cylinder drives the water injection pipe to move away from the fixed column, so that the water injection pipe is separated from the casing, thereby facilitating the removal of the casing.
[0020] 5) The casing sealing test tool according to 1), wherein:
[0021] The upper surface of the base is provided with a plurality of grooves for placing the protruding parts of the casing, and the grooves are arranged around the circumferential side of the fixed column.
[0022] The casing in the utility model has a plurality of protruding parts towards the surface of the base, and the upper surface of the base is provided with grooves matched with the protruding parts of the surface of the casing. When the casing is placed on the base, the protruding parts on the surface of the casing can be embedded in the grooves, so that the position of the casing on the base is accurate and stable, and the accuracy of the detection result is improved.
[0023] Compared with the prior art, the utility model also has the following technical effects:
[0024] In the utility model, the outer surface of the sleeve is provided with a water channel, and the inner surface of the casing and the water channel can form a sealed chamber. By injecting water into the sealed chamber, it is observed whether water leaks from other parts of the casing to determine the sealing property of the casing. The position of the water channel corresponds to the detection area of the casing, which can ensure that the detection area of the casing is completely covered by the water flow. This arrangement can ensure the comprehensiveness and accuracy of the detection result. Compared with the prior art, the utility model does not need to purchase detection instruments, which reduces the detection cost. At the same time, the surface of the base is provided with a sliding block for fixing the casing, so that the casing remains stable during the detection process, thereby improving the accuracy of the detection result. In addition, the mobility of the sliding block makes the utility model applicable to casings of different sizes, thereby significantly improving the versatility and flexibility. BRIEF DESCRIPTION OF DRAWINGS
[0025] Figure 1 It is a structural schematic view of the casing sealing test tool of the utility model.
[0026] Figure 2 It is a top view of the casing sealing test tool of the utility model. DETAILED DESCRIPTION
[0027] The following will be further described in detail through specific embodiments:
[0028] The reference signs in the drawings of the specification include: base 1, fixed column 2, sleeve 3, water channel 4, water injection pipe 5, water outlet pipe 6, sliding block 7, sliding hole 8, first bolt 9, second bolt 10, water injection port 11, air cylinder 12, electromagnetic valve 13, groove 14.
[0029] In an embodiment, as shown in the drawings, the casing tightness detection tool in the embodiment comprises a base 1, the base 1 is provided with a fixed column 2 for fixing the casing, the outer surface of the fixed column 2 is sleeved with a sleeve 3, the outer surface of the sleeve 3 is provided with a water channel 4 forming a sealed chamber with the inner surface of the casing, the base 1 is provided with a water injection pipe 5 and a water outlet pipe 6, the end of the water injection pipe 5 corresponds to the starting position of the water channel 4 and is in communication with the sealed chamber in use, and the end of the water outlet pipe 6 corresponds to the terminal position of the water channel 4 and is in communication with the sealed chamber in use. Figure 1 Figure 2 In the embodiment, the base 1 is provided with a fixed column 2 for fixing the casing, which can ensure that the casing remains stable during the tightness detection process. The outer surface of the fixed column 2 is sleeved with a sleeve 3, and the outer surface of the sleeve 3 is provided with a water channel 4, which can form a sealed chamber with the inner surface of the casing. By injecting water into the sealed chamber, the tightness of the casing can be detected. During the casing tightness detection process, the water injection pipe 5 is in communication with the starting position of the water channel 4, and the water outlet pipe 6 is in communication with the terminal position of the water channel 4. Water is injected into the sealed chamber through the water injection pipe 5, and as the water continues to be injected, the water flow begins to flow along the direction of the water channel 4, gradually filling each part of the sealed chamber, until the entire sealed chamber is completely filled with water, thereby fully covering the detection parts of the casing. At this time, if the casing has good tightness, the water flow will not leak from other parts of the casing, but only through the water outlet pipe 6. The water outlet pipe 6 can discharge the water in the sealed chamber, while ensuring that the water flow can smoothly pass through the entire water channel 4, thereby verifying the integrity of the sealed chamber.
[0030] During this process, the detection personnel can judge the tightness of the casing by observing whether there is water leaking from other parts of the casing. If it is found that water is leaking from a certain part of the casing during the detection process, it means that there is a leakage point at that part; if only the water outlet pipe 6 has water flowing out, it means that the casing has good tightness and no leakage. Finally, the water in the sealed chamber is discharged through the water outlet pipe. This detection method can simply and effectively detect the tightness of the casing, improve the accuracy of the casing tightness detection result, and reduce the detection cost.
[0031]
[0032] The water channel 4 is annular and arranged around the outer surface of the sleeve 3. In this embodiment, the water channel 4 is annular and arranged around the outer surface of the sleeve 3, and the position of the water channel 4 corresponds to the detection area of the casing. After the water flow is injected into the sealed chamber, it flows along the annular water channel 4 and uniformly covers each part of the sealed chamber, thereby ensuring that the detection area of the casing is completely covered. This design can avoid the situation of missed detection during the casing tightness detection process, thereby improving the comprehensiveness and accuracy of the detection.
[0033] A plurality of sliding blocks 7 for fixing the casing are slidably connected to the upper surface of the base 1. The sliding block 7 is provided with a sliding hole 8 in the form of a strip. The sliding block 7 can move along the axis direction of the sliding hole 8 on the upper surface of the base. The first bolt 9 is arranged close to the fixed column 2, and the second bolt 10 is arranged away from the fixed column 2. A plurality of threaded holes are formed in the base 1, and the positions of each threaded hole correspond to the positions of the first bolt 9 and the second bolt 10 respectively. The first bolt 9 and the second bolt 10 pass through the sliding hole 8 and are screwed into the threaded holes respectively.
[0034] In this embodiment, two sliding blocks 7 are slidably connected to the base 1 for fixing the casing during the casing tightness detection process to avoid inaccurate detection results due to unstable casing. The sliding block 7 is provided with a sliding hole 8 in the form of a strip. The sliding block 7 can move along the axis direction of the sliding hole 8 on the upper surface of the base. The operator can flexibly adjust the position of the sliding block 7 according to the size of the casing. By moving the sliding block 7 to make it tightly contact with the casing, the fixing of casings of different sizes can be realized. The mobility of the sliding block 7 improves the versatility and flexibility of the casing tightness detection tool, making it suitable for casings of various specifications. The first bolt 9 is arranged close to the fixed column 2, and the second bolt 10 is arranged away from the fixed column 2. The distance between the first bolt 9 and the inner side of the sliding hole 8 close to the first bolt 9 is the movable range of the sliding block 7. After the position adjustment of the sliding block 7 is completed, the first bolt 9 and the second bolt 10 pass through the sliding hole 8 and are screwed into the corresponding threaded holes respectively, thereby fixing the sliding block 7 on the base and ensuring its stability during the detection process.
[0035] The side wall of the water injection pipe 5 is provided with a water injection port 11 for injecting water into the water injection pipe 5. The end of the water injection pipe 5 away from the fixed column 2 is connected with a gas cylinder 12. The gas cylinder 12 is used to drive the water injection pipe 5 to move towards or away from the fixed column 2. The gas cylinder 12 is connected with an electromagnetic valve 13 for controlling the movement of the telescopic rod in the gas cylinder 12. The electromagnetic valve 13 is connected with an air compressor for providing compressed air.
[0036] In this embodiment, the internal space of the cylinder 12 is divided into two air chambers by the telescopic rod inside it. The electromagnetic valve 13 is connected to the air chamber at the top of the cylinder 12 through a first pipeline, forming a first air path. The electromagnetic valve 13 is connected to the air chamber at the bottom of the cylinder 12 through a second pipeline, forming a second air path. The movement of the valve core of the electromagnetic valve 13 is controlled by the magnetic field generated by the conductive coil, thereby controlling the switching of the first air path and the second air path, and thus controlling the movement of the telescopic rod inside the cylinder 12.
[0037] When the telescopic rod inside the cylinder 12 needs to move outward, the movement of the valve core in the electromagnetic valve allows compressed air to communicate with the first air path, and the compressed air enters the air chamber at the top of the cylinder 12 through the first air path. As the compressed air continues to fill, the pressure in the air chamber at the top of the cylinder 12 gradually increases, and the telescopic rod inside the cylinder 12 moves outward under the action of the compressed air pressure. At the same time, the compressed air in the air chamber at the bottom of the cylinder 12 is squeezed into the electromagnetic valve 13 and then discharged through the electromagnetic valve 13. The movement of the telescopic rod inside the cylinder 12 drives the water injection pipe 5 to move in the direction of approaching the fixed column 2 until the end of the water injection pipe 5 communicates with the sealed chamber. Then, water is injected into the water injection pipe 5 through the water injection port 11, and the water injection pipe 5 introduces water into the sealed chamber, thereby starting the sealing test of the casing.
[0038] After the sealing test of the casing is completed, the movement of the valve core in the electromagnetic valve 13 allows compressed air to communicate with the second air path, and the compressed air enters the air chamber at the bottom of the cylinder 12 through the second air path. As the compressed air continues to fill, the pressure in the air chamber at the bottom of the cylinder 12 gradually increases, and the telescopic rod inside the cylinder 12 moves into the cylinder 12 under the action of the compressed air pressure. At the same time, the compressed air in the air chamber at the top of the cylinder 12 is squeezed into the electromagnetic valve 13 and then discharged through the electromagnetic valve 13. The movement of the telescopic rod inside the cylinder 12 drives the water injection pipe 5 to move away from the fixed column 2, so that the water injection pipe 5 is separated from the casing, thereby facilitating the removal of the casing.
[0039] In addition, a plurality of grooves 14 for placing the protruding parts of the casing are provided on the upper surface of the base 1, and the grooves 14 are arranged around the circumferential side of the fixed column 2. The casing in this embodiment has two protruding parts facing the surface of the base 1, and the grooves on the base 1 in this embodiment are two, corresponding to the positions of the sliding blocks respectively. When the casing is placed on the base 1, the protruding parts on the surface of the casing can be embedded in the grooves 14, thereby ensuring the accurate and stable position of the casing on the base 1 and improving the accuracy of the detection results.
[0040] In the embodiment, the outer surface of the sleeve 3 is provided with a water channel 4, and the inner surface of the casing can form a sealed chamber with the water channel 4. By injecting water into the sealed chamber, it can be observed whether water leaks from other parts of the casing to determine the sealing performance of the casing. The position of the water channel 4 corresponds to the detection area of the casing, which can ensure that the detection area of the casing is completely covered by the water flow. This arrangement can ensure the comprehensiveness and accuracy of the detection results. Compared with the prior art, the embodiment does not need to purchase detection instruments, thereby reducing the detection cost. At the same time, the surface of the base 1 is provided with a sliding block 7 for fixing the casing, so that the casing remains stable during the detection process, thereby improving the accuracy of the detection results. In addition, the movability of the sliding block 7 enables the utility model to be applicable to casings of different sizes, thereby significantly improving the versatility and flexibility.
[0041] The above is only an embodiment of the utility model, and the specific technical solutions and / or common knowledge of characteristics in the scheme are not described in detail. It should be noted that for those skilled in the art, without departing from the technical solutions of the utility model, a number of modifications and improvements can be made, which should also be considered as the protection scope of the utility model, and these will not affect the effect and practicality of the utility model. The protection scope of the present application should be subject to the content of its claims, and the specific implementation mode and the like in the specification can be used to explain the content of the claims.
Claims
1. A housing tightness detection tool characterized by comprising: The base is provided with a fixing column for fixing the casing, the outer surface of the fixing column is sleeved with a sleeve, the outer surface of the sleeve is provided with a water channel forming a closed cavity with the inner surface of the casing, the base is provided with a water injection pipe and a water outlet pipe, the end of the water injection pipe corresponds to the starting position of the water channel and is in communication with the closed cavity in use, the end of the water outlet pipe corresponds to the terminal position of the water channel and is in communication with the closed cavity in use.
2. The detection tool for the sealing property of a case according to claim 1, wherein: The water channel is annular and is arranged around the outer surface of the sleeve.
3. The detection tool for the sealing property of a case according to claim 1, wherein: The upper surface of the base is slidably connected with a plurality of sliding blocks for fixing the casing, the sliding blocks are provided with strip-shaped sliding holes, the sliding blocks can move along the axis direction of the sliding holes, a plurality of bolts are arranged in the sliding holes, a plurality of threaded holes are arranged on the base, the positions of the threaded holes correspond to the positions of the bolts one by one, the bolts pass through the sliding holes and are screwed with the threaded holes.
4. The enclosure leak detection tool of claim 1, wherein: The side wall of the water injection pipe is provided with a water injection port for injecting water into the water injection pipe, the end of the water injection pipe away from the fixing column is connected with a gas cylinder, the gas cylinder is used to drive the water injection pipe to move towards or away from the fixing column, the gas cylinder is connected with an electromagnetic valve for controlling the extension and contraction of the gas cylinder.
5. The enclosure leak detection tool of claim 1, wherein: The upper surface of the base is provided with a plurality of grooves for placing the protruding parts of the casing, the grooves are arranged around the circumferential side of the fixing column.