Observation-free air tightness detection device

Abstract

The invention relates to an observation-free air tightness detection device, and relates to the technical field of air tightness detection. The device mainly comprises a frame body and a detection mechanism, the frame body is provided with a water tank and a mounting seat, the mounting seat is composed of a base and an upper plate, the base is provided with a test clamping seat, and the upper plate fixes a test cylinder and is connected with an inflation pressure plate; the detection mechanism comprises a floating plate and a detection assembly, the floating plate can float on the liquid level, and the detection assembly is used for monitoring the moving amplitude of the floating plate. Air tightness detection is realized through displacement change of the floating plate, manual observation is not needed, and detection precision and stability are improved by adopting a sealing element and a unique structural design. According to the invention, the effect of automatically and accurately detecting the air tightness of the workpiece is achieved, the detection efficiency and reliability are improved, and the air tightness test requirements in various scenes are met.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of air tightness detection, in particular to an observation-free air tightness detection device. BACKGROUND

[0002] The pipeline air tightness detection technology plays an important role in industrial production and is widely used in key links for ensuring the safe operation of equipment and improving product quality. With the rapid development of modern industry, the pipeline, as an important carrier for conveying various fluids, its sealing performance directly affects the stability and reliability of the system. Therefore, how to efficiently and accurately detect the air tightness of the pipeline has become one of the core problems of the current industry. The development of traditional air tightness detection technology has provided reliable protection for early industry, but as the manufacturing precision of the pipeline improves and the detection efficiency increases, the traditional method has been difficult to meet the needs of modern industry.

[0003] In practical applications, the traditional air tightness detection methods mainly include the following: 1. The pipeline is completely immersed in a water tank, and the generation of bubbles is observed by naked eye; 2. With the aid of a microscope for observation, the process of bubble formation is magnified and more clearly identified; 3. The detection time is prolonged, and the smaller leak hole is gradually allowed to produce visible bubbles. These methods can achieve the basic air tightness detection function, but they all rely on manual observation and long waiting time, and are difficult to meet the requirements of high-precision pipeline rapid detection.

[0004] However, the main defect of the above method is that when the pipeline leak hole is small, the air seepage produces small bubbles and the formation speed is slow, which significantly reduces the detection efficiency. At the same time, manual observation is easily affected by factors such as operator fatigue and environmental interference, thereby increasing the risk of missed and false judgments, and cannot meet the needs of modern industry for efficient and accurate detection. Therefore, there is an urgent need for a technical means that can reduce manual intervention and improve detection efficiency to solve this problem. SUMMARY

[0005] In order to solve the above problems, the application provides an observation-free air tightness detection device.

[0006] The observation-free air tightness detection device provided by the application adopts the following technical scheme: An observation-free air tightness detection device, comprising a frame body and a detection mechanism, a water tank and a mounting seat are fixedly arranged on the frame body, the mounting seat comprises a base and an upper plate, a test card holder is installed on the base, a test air cylinder is fixedly arranged on the upper plate, an air charging pressure disc is fixedly arranged on the output shaft of the test air cylinder, the detection mechanism comprises a floating plate and a detection assembly, the floating plate can float on the liquid surface, and the detection assembly is used for detecting the movement amplitude of the floating plate.

[0007] By adopting the technical scheme, the observation-free air tightness detection device can effectively reduce manual intervention and improve detection efficiency and accuracy. The automatic detection is realized by arranging the frame body and the detection mechanism, and the fatigue and misjudgment caused by manual observation in the traditional method are avoided. The combination of the test card seat and the test cylinder can quickly complete the sealing and inflation operation of the pipeline, thereby improving the detection efficiency. The design that the floating plate floats on the liquid surface can sensitively reflect the water level change caused by pipeline leakage, thereby improving the sensitivity of detection. The detection assembly is used for detecting the moving amplitude of the floating plate, thereby realizing quantitative analysis of the leakage amount and meeting the high-precision detection requirement.

[0008] Preferably, a guide groove is arranged on the side wall of the water tank, and a sealing block is arranged on the floating plate and matched with the guide groove.

[0009] By adopting the technical scheme, the relative position between the floating plate and the water tank is accurately guided and limited, the stability of the floating plate during movement on the liquid surface is ensured, and the detection error caused by floating plate deviation is reduced. Meanwhile, the plug-in cooperation of the sealing block effectively prevents liquid leakage from the guide groove, improves the sealing performance of the device, and improves the accuracy of the detection result.

[0010] Preferably, a sealing element is arranged on the edge of the floating plate.

[0011] By adopting the technical scheme, the sealing element arranged on the edge of the floating plate can effectively reduce the gap between the floating plate and the side wall of the water tank, prevent liquid leakage from the gap, and improve the sealing performance of the detection device. This design ensures the accuracy of the liquid surface change when the floating plate moves, avoids interference of external factors on the detection result, and improves the accuracy and reliability of the air tightness detection.

[0012] Preferably, the detection mechanism comprises a downward pressing cylinder arranged at the top of the frame body, an output shaft of the downward pressing cylinder is movably inserted into the floating plate, and the output shaft of the downward pressing cylinder comprises an adjusting part and a connecting part.

[0013] By adopting the technical scheme, the detection mechanism is movably inserted into the floating plate by arranging the downward pressing cylinder at the top of the frame body, thereby realizing accurate control of the floating plate. The output shaft of the downward pressing cylinder is divided into the adjusting part and the connecting part, and this structure design makes the detection process more flexible and controllable.

[0014] Preferably, a detection groove and a connecting groove are arranged on the floating plate, the connecting part is movably inserted into the connecting groove, and a sealing element is arranged on the connecting part.

[0015] By adopting the above technical scheme, the detection groove and the connecting groove are arranged on the floating plate, the connecting part can be movably inserted into the connecting groove, thereby realizing stable connection between the detection mechanism and the floating plate, and ensuring accurate measurement of the moving range of the floating plate during detection. The sealing element arranged on the connecting part effectively prevents liquid from seeping into the connecting part, avoids reduction of detection accuracy caused by liquid leakage, and improves reliability and stability of the detection device.

[0016] Preferably, the detection assembly comprises a pitch groove arranged on the adjusting part, and the detection assembly further comprises a sliding synapse fixedly arranged in the detection groove, and the sliding synapse is inserted into the pitch groove.

[0017] By adopting the above technical scheme, the moving range of the floating plate can be accurately detected. The cooperation between the pitch groove and the sliding synapse enables the displacement change of the floating plate to be converted into relative movement of the sliding synapse in the pitch groove, thereby realizing accurate perception of the position of the floating plate. This design effectively improves the sensitivity and accuracy of detection, avoids errors caused by manual observation in traditional methods, and significantly improves the reliability and efficiency of the air tightness detection.

[0018] Preferably, the detection assembly further comprises a trigger disc fixedly arranged on the connecting part, the trigger disc is arranged at the bottom of the floating plate, and a switch synapse a is fixedly arranged at the top of the trigger disc.

[0019] By adopting the above technical scheme, the trigger disc can accurately perceive the movement of the floating plate, and the automatic triggering of the detection signal can be realized through the interaction between the switch synapse a and the floating plate, thereby reducing manual intervention. This design significantly improves the automation degree of the detection process, avoids fatigue and errors that may be caused by manual observation, and improves the accuracy and efficiency of detection. The structure of the trigger disc combined with the switch synapse a can quickly respond when the floating plate is displaced, ensuring that small leaks can also be captured in time, meeting the demand of modern industry for efficient and accurate detection.

[0020] Preferably, a slot is arranged on the side of the floating plate facing the trigger disc, the switch synapse a can be inserted into the slot, and a switch synapse b is arranged in the slot.

[0021] By adopting the above technical scheme, the slot is arranged on the side of the floating plate facing the trigger disc, so that the switch synapse a can be accurately inserted into the slot and cooperate with the switch synapse b in the slot. The cooperation between the switch synapse a and the switch synapse b can quickly respond to the position change of the floating plate.

[0022] Preferably, the connecting part is fixedly connected with the upper plate.

[0023] By adopting the technical scheme, the connecting portion is fixedly connected with the upper plate, so that the structure of the detection mechanism is more stable, the fixed connection mode enhances the reliability of the whole device, ensures the accuracy of the detection result, and simplifies the assembly and maintenance process of the device.

[0024] Preferably, a plurality of connecting rods are arranged between the base and the upper plate, and a plurality of through holes are formed on the upper plate to form air vents.

[0025] By adopting the technical scheme, the connecting rods arranged between the base and the upper plate can enhance the overall structural stability of the mounting seat, prevent the device from deforming due to external force or vibration during detection, and thus ensure the detection accuracy. The air vents formed on the upper plate can effectively reduce the accumulation of water vapor during detection, avoid affecting the normal floating of the floating plate and the operation of the detection assembly, and at the same time help to keep the inside of the device dry and prolong the service life of the equipment.

[0026] In summary, the present application has at least one of the following beneficial technical effects: 1. The movement amplitude of the floating plate is automatically detected by the floating plate and the detection assembly, reducing the dependence on manual observation, reducing the risk of missed and mistaken judgments, and significantly improving the detection accuracy; 2. The floating plate floats on the liquid surface and can quickly respond to the water level change caused by the bubbles generated by pipeline leakage, effectively shortening the detection time and improving the detection efficiency; 3. The combination design of the frame and the detection mechanism provides a stable detection environment, adapts to the air tightness detection requirements of high-precision pipelines, and meets the requirements of modern industry for high-efficiency automatic detection. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a perspective view of an embodiment of the present application; Figure 2 is a perspective view of an embodiment of the present application; Figure 3 is a partial enlarged view of the relationship between the floating plate and the mounting seat; Figure 4 is a perspective view showing the specific structure of the detection mechanism; Figure 5 is a perspective view showing the specific structure of the detection assembly; Figure 6 is an exploded view showing the specific structure of the detection assembly.

[0028] Explanation of reference signs: 1, frame body; 11, water tank; 12, guide groove; 21, base; 22, connecting rod; 23, upper plate; 231, air vent; 24, test air cylinder; 25, inflation pressure disc; 26, test card seat; 3, lower pressing air cylinder; 31, adjusting part; 311, pitch groove; 32, connecting part; 4, floating plate; 41, insertion groove; 411, switch synapse b; 42, detection groove; 421, sliding synapse; 43, connecting groove; 44, sealing block; 5, trigger disc; 51, switch synapse a. DETAILED DESCRIPTION

[0029] The application will be further described in detail below with reference to the accompanying drawings.

[0030] In the description of the application, it should be understood that the orientation description, such as the orientation or position relationship indicated by up, down, front, back, left, right, etc., is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the application and simplifying the description, and therefore cannot be understood as a limitation on the application.

[0031] The embodiment of the application discloses an observation-free air tightness detection device, which refers to Figure 1 , comprising a frame body 1 and a detection mechanism, the frame body 1 is fixedly provided with a water tank 11 and a mounting seat, the mounting seat comprises a base 21 and an upper plate 23, a plurality of connecting rods 22 are arranged between the base 21 and the upper plate 23, the connecting rods 22 reinforce the integrity between the base 21 and the upper plate 23, the base 21 and the upper plate 23 are kept parallel through the fixation of the connecting rods 22, and the base 21 and the upper plate 23 are kept parallel with the liquid surface. A plurality of through holes are formed on the upper plate 23 to form air vents 231, which facilitate the passage of generated bubbles.

[0032] Referring to Figure 2 and Figure 3 , the base 21 is provided with a test card seat 26, the upper plate 23 is fixedly provided with a test air cylinder 24, the output shaft of the test air cylinder 24 is fixedly provided with an inflation pressure disc 25, the test card seat 26 and the inflation pressure disc 25 are arranged in a conventional manner, the test card seat 26 is used for sealing the one-side pipe opening of a pipeline part and fixing the position of the pipeline, the test air cylinder 24 drives the inflation pressure disc 25 to press down, the inflation pressure disc 25 is pressed tightly against the other-side pipe opening of the pipeline part and is sealed, and the test air cylinder 24 always applies pressure to the pipeline part during the test to ensure the sealing performance during the test. The inflation pressure disc 25 is externally connected with a pipeline for supplying air, which is used for inflating the pipeline. If the pipeline part is not well sealed, bubbles will seep out.

[0033] Referring to Figure 4 , Figure 5 and Figure 6In the air tightness detection process, in order to realize the operator free from observation, the detection mechanism includes the floating plate 4 and the detection assembly. In the application, the liquid filled in the water tank 11 is water, and the material density of the floating plate 4 is lower than that of water, so that the floating plate 4 has the technical effect of being able to float on the liquid surface. The detection assembly is used to detect the moving amplitude of the floating plate 4.

[0034] In order to ensure that the floating plate 4 is in parallel contact with the liquid surface, and to reduce the influence of water surface fluctuation on the floating plate 4, a guide groove 12 is formed on the side wall of the water tank 11. The guide groove 12 is a vertical groove formed on the inner side wall of the water tank 11, and the floating plate 4 is matched with the guide groove 12 to form a sealing block 44. The sealing block 44 is inserted into the guide groove 12 and can move along the guide groove 12. The shape of the sealing block 44 is matched with the shape of the guide groove 12, which improves the cooperation between the sealing block 44 and the guide groove 12. In order to enhance the sealing between the sealing block 44 and the guide groove 12, prevent the bubbles generated in the water tank 11 from leaking out between the sealing block 44 and the guide groove 12, a sealing element is arranged between the sealing block 44 and the guide groove 12. The sealing element has a certain compression rate, so that it can still maintain the sealing property during the dynamic low-speed movement. The edge of the floating plate 4 is also provided with a sealing element, which is sleeved on the floating plate 4 and in contact with the inner surface of the water tank 11, so as to prevent the bubbles from passing between the floating plate 4 and the inner wall of the water tank 11.

[0035] The detection mechanism includes a downward pressing cylinder 3 arranged on the top of the frame body 1. The output shaft of the downward pressing cylinder 3 is movably inserted into the floating plate 4, so as to ensure that the downward pressing cylinder 3 does not directly drive the floating plate 4. The output shaft of the downward pressing cylinder 3 includes an adjusting part 31 and a connecting part 32. The connecting part 32 is fixedly connected with the upper plate 23, so that the downward pressing cylinder 3 can directly drive the mounting seat to move. The floating plate 4 is provided with a detection groove 42 and a connecting groove 43. The detection groove 42 is formed from the top of the floating plate 4, and the width of the detection groove 42 is greater than that of the connecting groove 43. The connecting groove 43 is a through groove formed downward from the groove bottom of the detection groove 42. The connecting part 32 is movably inserted into the connecting groove 43. The connecting part 32 is also provided with the same sealing element, which can prevent the liquid from entering the detection groove 42 and affecting the detection accuracy.

[0036] The detection assembly comprises a pitch groove 311 formed on the adjusting part 31, and further comprises two sliding synapses 421 fixedly arranged in a detection groove 42 formed on two opposite sides of the adjusting part 31. The sliding synapses 421 are arranged in the detection groove 42 in a matched mode, and are inserted into the pitch groove 311. When the adjusting part 31 is driven to move up and down by the down cylinder 3, the sliding synapses 421 move relative to the pitch groove 311. The sliding synapses 421 are arranged as conductors, the pitch groove 311 can limit the moving range of the sliding synapses 421, and can ensure that the sliding synapses 421 and the adjusting part 31 move vertically up and down. When the adjusting part 31 moves up and down, the sliding synapses 421 are arranged to be in contact with the adjusting part 31, so that the sliding resistance effect is formed, thereby causing the voltage of the sliding synapses 421 arranged at two ends to change. According to the change of the voltage, it can be judged whether the floating plate 4 moves up. In order to ensure the stability of detection, the adjusting part 31 is arranged as a conductive rod body, and the connecting part 32 is made of insulating material.

[0037] The detection assembly further comprises a trigger disc 5 fixedly arranged on the connecting part 32. The upper surface of the trigger disc 5 is arranged as a plane. The trigger disc 5 is fixed on the connecting part 32, so that the trigger disc 5 can be driven to move by the down cylinder 3. The trigger disc 5 is arranged at the bottom of the floating plate 4, and the top of the trigger disc 5 can be in contact with the bottom of the floating plate 4. The top of the trigger disc 5 is fixedly arranged with a switch synapse a51. The side of the floating plate 4 facing the trigger disc 5 is formed with a slot 41. The switch synapse a51 can be inserted into the slot 41. The slot 41 is arranged with a switch synapse b411. When the switch synapse a51 is inserted into the slot 41, with the continuous upward movement of the trigger disc 5, the switch synapse a51 is in contact with the switch synapse b411. Conversely, with the downward movement of the trigger disc 5, the switch synapse a51 is disconnected from the switch synapse b411. In the default state, the switch synapse a51 is in contact with the switch synapse b411. In the contact state, the working circuit of the down cylinder 3 is turned on. The disconnection of the switch synapse a51 and the switch synapse b411 can disconnect the driving circuit of the down cylinder 3, so that the down cylinder 3 cannot continue to drive the mounting seat to move.

[0038] The implementation principle of the embodiment of the application is that the air-tightness detection device provided by the application is suitable for any size of pipe parts, and is provided with a conventional controller for controlling the equipment. The test seat 26 and the inflation pressure disc 25 can be adaptively matched according to the specific size of the pipe. When the device is used to test the air-tightness of the pipe part, the pipe part needs to be installed first. During installation, the down cylinder 3 needs to be controlled to drive the mounting seat to move upward out of the water tank 11. The operator manually places the pipe part to ensure that the pipe opening is fully clamped with the test seat 26, and then controls the test cylinder 24 to drive the inflation pressure disc 25 to move downward, so that the inflation pressure disc 25 tightly presses the other pipe opening of the pipe part.

[0039] After the above steps are completed, the air tightness test is started. The control down cylinder 3 drives the mounting base to move down and be completely immersed in the liquid. In this process, the mounting base moves down from the position above the water tank 11 to the water tank 11, when the mounting base is above the water tank 11, the bottom of the floating plate 4 is in contact with the trigger disc 5, the trigger disc 5 bears the floating plate 4, at this time, the switch contact a51 is inserted into the insertion slot 41, and the switch contact a51 is in contact with the switch contact b411, and the driving circuit of the down cylinder 3 is connected. As the mounting base moves down, the down cylinder 3 also drives the trigger disc 5 to move down, and the floating plate 4 moves down with the trigger disc 5, so that the sealing blocks 44 at both ends of the floating plate 4 are inserted into the guide groove 12, and the floating plate 4 moves into the water tank 11. As the down cylinder 3 continues to drive the mounting base to move down, the mounting base will be completely immersed in the liquid, and in this process, the floating plate 4 will be in contact with the liquid surface. The floating plate 4 floats on the liquid surface under the action of its own buoyancy, and when the down cylinder 3 continues to drive the mounting base to move down, the floating plate 4 will float on the water surface, so that the trigger disc 5 is separated from the floating plate 4. At the same time, the switch contact a51 and the switch contact b411 become non-contact state, the circuit of the down cylinder 3 is disconnected, and the movement of the mounting base is stopped. At this time, the mounting base has been completely immersed in the liquid, the switch contact a51 is in the insertion slot 41 and does not contact the switch contact b411, which can avoid the liquid splashing on the switch contact a51 and the switch contact b411, and ensure the stability of the electrical connection between the switch contact a51 and the switch contact b411.

[0040] Subsequently, the operator controls the inflation pressure disc 25 to inflate towards the pipeline, and as the air pressure in the pipeline rises, if the pipeline sealing performance is poor, small bubbles will seep out. After a period of time, the air pressure in the pipeline rises to a certain value, and the speed of the small bubbles seeping out becomes faster, so that the total amount of small bubbles seeping out becomes larger.

[0041] Because the sealing element is arranged between the floating plate 4 and the water tank 11, the bubbles cannot pass through under the action of the sealing element. These bubbles will be gathered between the liquid surface and the floating plate 4, and the floating plate 4 will be pushed up by these bubbles. In the detection process, as the floating plate 4 is pushed up by the bubbles, the floating plate 4 moves up when the sliding contact 421 moves up along the degree groove 311, so that the voltage passing through the sliding contact 421 at both ends changes. If the voltage changes, it can be judged that the pipeline part has poor sealing performance.

[0042] The above are preferred embodiments of the present application, which do not limit the protection scope of the present application, therefore: any equivalent changes made on the basis of the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. An observation-free airtightness detection device, characterized in that: The invention comprises a frame (1) and a detection mechanism, wherein a water tank (11) and a mounting seat are fixedly provided on the frame (1), the mounting seat comprises a base (21) and an upper plate (23), a test card seat (26) is mounted on the base (21), a test cylinder (24) is fixedly provided on the upper plate (23), and an inflatable pressure plate (25) is fixedly provided on the output shaft of the test cylinder (24), the detection mechanism comprises a floating plate (4) and a detection assembly, the floating plate (4) can float on the liquid surface, and the detection assembly is used to detect the movement amplitude of the floating plate (4).

2. The observation-free airtightness detection device according to claim 1, characterized in that: A guide groove (12) is provided on the side wall of the water tank (11), and a sealing block (44) is provided on the floating plate (4) to match the guide groove (12).

3. The observation-free airtightness detection device according to claim 1, characterized in that: The edge of the floating plate (4) is provided with a sealing element.

4. The observation-free airtightness detection device according to claim 1, characterized in that: The detection mechanism comprises a downward pressure cylinder (3) arranged on the top of the frame (1); the output shaft of the downward pressure cylinder (3) is movably inserted into the floating plate (4); and the output shaft of the downward pressure cylinder (3) comprises an adjusting portion (31) and a connecting portion (32).

5. The observation-free airtightness detection device according to claim 4, characterized in that: The floating plate (4) is provided with a detection groove (42) and a connection groove (43); the connection portion (32) is movably inserted into the connection groove (43); and a sealing element is provided on the connection portion (32).

6. The observation-free airtightness detection device according to claim 5, characterized in that: The detection component includes a node groove (311) opened on the adjustment part (31), and the detection component also includes a sliding synapse (421) fixedly arranged in the detection groove (42), and the sliding synapse (421) is inserted in the node groove (311).

7. The observation-free airtightness detection device according to claim 4, characterized in that: The detection assembly further comprises a trigger disk (5) fixedly arranged on the connecting portion (32), the trigger disk (5) being arranged at the bottom of the floating plate (4), and a switch synapse a (51) being fixedly arranged on the top of the trigger disk (5).

8. The observation-free airtightness detection device according to claim 7, characterized in that: A slot (41) is provided on one side of the floating plate (4) facing the trigger disk (5), and the switch synapse a (51) can be inserted into the slot (41). A switch synapse b (411) is provided in the slot (41).

9. The observation-free airtightness detection device according to claim 4, characterized in that: The connecting portion (32) is fixedly connected to the upper plate (23).

10. The observation-free airtightness detection device according to claim 1, characterized in that: A plurality of connecting rods (22) are provided between the base (21) and the upper plate (23), and a plurality of through holes are provided on the upper plate (23) to form air holes (231).

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