Ventilation air conditioner air tightness detection device

Abstract

The invention relates to a ventilation air conditioner air tightness detection device, and relates to the technical field of air tightness detection equipment, the air tightness detection device comprises a sealing detection box, the sealing detection box is internally provided with an electromagnetic valve, the electromagnetic valve is communicated with the internal space of the sealing detection box, and the sealing detection box is also internally provided with a bubble monitor used for detecting bubbles; the air supply mechanism comprises an air blower and an air inlet pipe, one end of the air inlet pipe is communicated with the air blower, and the other end is communicated with the sealing detection box; the connecting mechanism comprises a connecting pipe, one end of the connecting pipe extends into the sealing detection box and communicates with the electromagnetic valve, and the end, away from the electromagnetic valve, of the connecting pipe is used for being connected with a detected pipe; a pressure gauge is arranged on the connecting pipe; the water supply mechanism comprises a water pump and a water inlet pipe, one end of the water inlet pipe is communicated with the water pump, and the other end is communicated with the sealing detection box. According to the air tightness detection device, the accuracy of an air tightness detection result can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of air tightness detection equipment, and in particular to an air tightness detection device for ventilation and air conditioning. Background Art

[0002] Ventilation and air conditioning is a kind of municipal infrastructure used for ventilation and air conditioning engineering in industrial and civil buildings to make air flow and reduce the concentration of harmful gases. Nowadays, ventilation and air conditioning has been widely used in industrial and construction projects, especially in winter or summer. Ventilation and air conditioning is widely used in dust-free workshop purification systems in the electronics industry, aseptic workshop purification systems in medicine and food, hotels, shopping malls, hospitals, factories and office buildings. During the construction of air conditioning and ventilation, it is necessary to conduct air tightness testing on ventilation and air conditioning.

[0003] At present, the air tightness detection device used for ventilation and air conditioning air tightness detection mainly includes a fixing frame, a blower, a connecting pipe, a solenoid valve and a pressure gauge. The blower is installed on the fixing frame, one end of the connecting pipe is connected to the blower, and the other end is connected to the pipeline of the ventilation and air conditioning to be tested. The solenoid valve and the pressure gauge are both arranged on the connecting pipe, and the pressure gauge is located between the solenoid valve and the ventilation and air conditioning to be tested along the direction of the connecting pipe. When performing the air tightness detection, the blower injects air into the ventilation and air conditioning to be tested through the connecting pipe, and then closes the solenoid valve and maintains the pressure for a period of time. During this process, if the value of the pressure gauge changes, it means that there is a pressure loss, and it can be determined that the ventilation and air conditioning to be tested has poor air tightness; on the contrary, if the value of the pressure gauge does not change, it means that the ventilation and air conditioning to be tested has good air tightness.

[0004] Regarding the above-mentioned related technologies, since the internal components of the solenoid valve age after long-term use, the solenoid valve may leak. Furthermore, when performing air tightness testing, the leakage of the solenoid valve will also cause the value of the pressure gauge to change, which can easily lead to inaccurate detection results of the air tightness detection device. Summary of the invention

[0005] The present application provides a ventilation and air conditioning air tightness detection device, the purpose of which is to perform air tightness detection on the solenoid valve when performing air tightness detection on the ventilation and air conditioning, so as to prevent inaccurate detection results caused by leakage of the solenoid valve.

[0006] The present application provides a ventilation and air conditioning air tightness detection device adopts the following technical solution: A ventilation and air conditioning air tightness detection device, comprising a sealing detection box, in which a solenoid valve is arranged, the solenoid valve is connected to the internal space of the sealing detection box, and a bubble monitor for detecting bubbles is also arranged in the sealing detection box; an air supply mechanism, comprising a blower and an air inlet pipe, one end of the air inlet pipe is connected to the blower, and the other end is connected to the sealing detection box; a connecting mechanism, comprising a connecting pipe, one end of the connecting pipe extends into the sealing detection box and is connected to the solenoid valve, and the end of the connecting pipe away from the solenoid valve is used for connecting to a pipe to be tested; and a pressure gauge is arranged on the connecting pipe; a water supply mechanism, comprising a water pump and a water inlet pipe, one end of the water inlet pipe is connected to the water pump, and the other end is connected to the sealing detection box.

[0007] By adopting the above technical solution, first, the sealing detection box, the air supply mechanism and the connecting mechanism are arranged in coordination, and the blower, the air intake pipe, the sealing detection box, the solenoid valve and the connecting pipe are connected in sequence. Since the connecting pipe is used to connect the pipe to be tested, after the connecting pipe is connected to the pipe to be tested, the blower is started, and the air in the blower passes through the air intake pipe, the sealing detection box, the bubbling pipe, the solenoid valve and the connecting pipe into the pipe to be tested. When the air pressure in the pipe to be tested meets the air tightness test requirements, the solenoid valve is closed, and the pipe to be tested and the connecting pipe are maintained at pressure. In the pressure-maintaining state, the air pressure in the ventilation and air conditioning to be tested is read by the pressure gauge. When the pressure gauge data changes, it indicates that the ventilation and air conditioning to be tested has poor air tightness; on the contrary, if the pressure gauge data is stable, it indicates that the ventilation and air conditioning to be tested has good air tightness. This can meet the function of the air tightness detection device.

[0008] Secondly, on the basis of the above, the water supply mechanism is set up to inject water into the sealing detection box. After the solenoid valve is closed, that is, in the pressure-maintaining state, the water supply mechanism injects water into the sealing detection box, and the water in the sealing detection box covers the end of the solenoid valve away from the connecting pipe. Since the air pressure in the connecting pipe is high in the pressure-maintaining state, if there is a leakage problem in the solenoid valve, the gas in the connecting pipe will flow out from the end of the solenoid valve away from the connecting pipe, and then discharged into the water, generating bubbles; on the contrary, if the solenoid valve is intact, no bubbles will be generated in the water. The generation of bubbles is automatically detected by the bubble monitor, which can realize the detection of the air tightness of the solenoid valve.

[0009] Based on the cooperation of the above-mentioned pressure gauge and bubble monitor, when performing air tightness test on ventilation and air conditioning, air tightness test on solenoid valve can be performed at the same time to prevent inaccurate test results caused by leakage of solenoid valve.

[0010] Optionally, a bubbling tube is further provided in the sealing detection box. The bubbling tube is arranged in a vertical direction, the upper end of the bubbling tube is connected to an end of the solenoid valve away from the connecting tube, and the lower end of the bubbling tube is spaced apart from the bottom of the sealing detection box.

[0011] By adopting the above technical solution and the setting of the bubbling tube, when there is a leak in the solenoid valve, the gas in the connecting tube needs to pass through the solenoid valve into the bubbling tube and then be discharged from the lower end of the bubbling tube. The lower end of the bubbling tube is close to the bottom of the sealing detection box, which can reduce water consumption and prevent water from directly submerging the solenoid valve.

[0012] Optionally, a liquid level sensor is further provided in the sealing detection box, and the liquid level sensor is located at the lower side of the solenoid valve in the vertical direction, and the liquid level sensor is located at the upper side of the lower end surface of the bubbling tube in the vertical direction.

[0013] By adopting the above technical solution, the setting of the liquid level sensor can detect the liquid level height in the sealed detection box, prevent the liquid level in the sealed detection box from being too high and flooding the solenoid valve, and prevent the liquid level in the sealed detection box from being too low and unable to flood the lower end of the bubbling tube.

[0014] Optionally, a connector for connecting to the measured tube is provided on the connecting tube, and the connector is located at an end of the connecting tube away from the solenoid valve.

[0015] By adopting the above technical solution and setting of the connector, the connecting pipe can be connected to the measured pipe.

[0016] Optionally, the connector includes a sleeve and a plug, one end of the plug is sleeved on the outside of the connecting tube, the sleeve is sleeved on the outside of the plug, and the inner wall of one end of the sleeve facing the connecting tube is fixedly connected to the outer wall of the plug, and the inner wall of one end of the sleeve away from the connecting tube is spaced apart from the outer wall of the plug.

[0017] By adopting the above technical solution, the sleeve and the insert tube are arranged in coordination, the insert tube realizes the connection between the connecting tube and the tube to be measured, and the arrangement of the sleeve allows the tube to be measured to be inserted into the interval space between the inner wall of the sleeve and the outer wall of the insert tube, which can improve the stability and sealing of the connection between the tube to be measured and the connector.

[0018] Optionally, a third sealing ring is sleeved on the outer side of one end of the inserting tube away from the connecting tube.

[0019] By adopting the above technical solution and setting the third sealing ring, when the measured tube is set outside the insertion tube, the outer wall of the third sealing ring will contact the measured tube, which can improve the sealing performance of the connection between the insertion tube and the measured tube.

[0020] Optionally, an extrusion ring groove is provided on the outer side of the insert tube, and the third sealing ring is located in the extrusion ring groove; a resistance ring is sleeved on the outer side of the insert tube, the resistance ring is located in the extrusion ring groove, and the resistance ring is slidingly connected to the inner wall of the extrusion ring groove along its own axial direction; one axial end of the resistance ring resists the third sealing ring, and the resistance ring is located on the side of the third sealing ring facing the connecting pipe.

[0021] By adopting the above technical solution, the extrusion ring groove is opened to prevent the third sealing ring from being too thick and causing the measured tube to be unable to be sleeved on the outside of the cannula. As for the setting of the resistance ring, after the measured tube is sleeved on the cannula, the resistance ring is slid, and one end of the resistance ring is in contact with the third sealing ring. At this time, the third sealing ring is deformed. Specifically, the outer wall of the third sealing ring bulges away from the central axis. The deformation of the third sealing ring can increase the tightness of the connection between the third sealing ring and the measured tube, so the sealing of the connection between the cannula and the measured tube can be further improved.

[0022] Optionally, the inner side wall of the abutment ring is connected to the inner side wall corresponding to the extrusion ring groove by threads.

[0023] By adopting the above technical solution, the resistance ring is connected to the inner wall corresponding to the extrusion ring groove by means of threads. On the one hand, by twisting the resistance ring, the resistance ring can move in the extrusion ring groove along its own axis, so that the resistance ring can resist the third sealing ring. On the other hand, the threaded connection can prevent the resistance ring from resetting after the third sealing ring is deformed, thereby preventing the third sealing ring from recovering from deformation.

[0024] Optionally, the sleeve includes a limiting tube, which is sleeved on the outside of the insert tube, and the inner wall of the limiting tube is fixedly connected to the outer wall of the insert tube; the limiting tube is sleeved on one end of its axial direction away from the connecting tube with an externally threaded tube, and the externally threaded tube is slidably connected to the limiting tube along its axial direction; the end of the externally threaded tube away from the connecting tube is provided with a clamping assembly for clamping the measured tube.

[0025] By adopting the above technical solution, the setting of the limit tube is used to realize the connection between the sleeve and the insert tube. The setting of the external threaded tube, the external threaded tube is sleeved on the outside of the limit tube, which can form a space for connecting the measured tube between the inner wall of the external threaded tube and the outer wall of the insert tube; at the same time, because the external threaded tube can slide along the axial direction of the limit tube, such a structure makes it possible to slide the external threaded tube in the direction of the connecting tube when the measured tube needs to be connected, so that the insert tube is exposed, which is convenient for the installation of the measured tube; and after the measured tube is installed, the external threaded tube is reset, which can ensure the stability of the connection of the measured tube. The setting of the clamping assembly on the external threaded tube can clamp the measured tube after the external threaded tube is reset, further improving the stability of the connection of the measured tube.

[0026] Optionally, the clamping assembly includes a plurality of external threaded plates, which are located at one end of the external threaded tube away from the connecting tube, and the plurality of external threaded plates are spaced in sequence along the circumference of the external threaded tube; a locking ring is provided on the outer side of the external threaded tube, and the locking ring is connected to the external threaded tube by threads; when the locking ring moves in a direction away from the connecting tube, the locking ring contacts the plurality of external threaded plates and brings them closer to each other.

[0027] By adopting the above technical solution, the clamping assembly is arranged by the cooperation of the locking ring and a plurality of external threaded plates, and the locking ring is connected to the external threaded tube by threads, so that when the locking ring is turned, the locking ring will move along its own axial direction, and then the locking ring will move toward the direction of the plurality of external threaded plates, and resist the deformation of the plurality of external threaded plates, so that the plurality of external threaded plates are close to each other, thereby realizing the function of the clamping assembly.

[0028] In summary, the present application includes at least one of the following beneficial technical effects: 1. When the air tightness detection device of the present application performs air tightness detection on the ventilation and air conditioning, it can also perform air tightness detection on the solenoid valve at the same time, thereby preventing inaccurate detection results caused by leakage of the solenoid valve.

[0029] 2. The present application can control the amount of water in the sealed detection box by coordinating the bubbling tube and the liquid level sensor to prevent the amount of water in the sealed detection box from being excessive or insufficient.

[0030] 3. The present application can improve the convenience, stability and sealing of the connection between the connecting pipe and the pipe to be tested, and improve the accuracy of the air tightness test results through the structural setting of the connector. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the overall structure of the airtightness detection device of the present application.

[0032] Figure 2 It is a schematic diagram of the internal structure of the sealing detection box of the present application.

[0033] Figure 3 It is a schematic diagram of the overall structure of the connector of this application.

[0034] Figure 4 It is a schematic diagram of the overall structure of the cannula, the first sealing ring, the second sealing ring, the third sealing ring, and the resistance ring of the present application.

[0035] Figure 5 It is a schematic diagram of the overall structure of the cannula of the present application.

[0036] Figure 6 It is a schematic diagram of the overall structure of the first sealing ring of the present application.

[0037] Figure 7 It is a schematic diagram of the explosion structure of the third sealing ring and the resistance ring of the present application.

[0038] Figure 8 It is a schematic diagram of the overall structure of the casing of this application.

[0039] In the figure, 1, base; 11, support plate; 12, universal wheel; 2, control mechanism; 3, sealing detection box; 31, solenoid valve; 32, bubbling tube; 33, bubble monitor; 34, liquid level sensor; 4, air supply mechanism; 41, air inlet pipe; 42, blower; 5, connecting mechanism; 51, connecting pipe; 52, pressure gauge; 6, water supply mechanism; 61, water inlet pipe; 62, water pump; 63, water tank; 7, connector; 71, intubation; 711, first sealing ring; 712, first ring groove; 713 , second sealing ring; 714, second ring groove; 715, third sealing ring; 7151, second interference slope; 716, extrusion ring groove; 717, interference ring; 7171, first interference slope; 72, sleeve; 721, limit tube; 7211, sliding long groove; 722, external threaded tube; 723, sliding return member; 7231, slide rod; 7232, return spring; 724, clamping assembly; 7241, external threaded plate; 7242, locking ring; 7243, clamping block; 73, plug-in groove. DETAILED DESCRIPTION

[0040] The following is combined with Figure 1 -Attached Figure 8 , further details of this application are given.

[0041] A ventilation and air conditioning air tightness detection device, referring to Figure 1 , including a base 1, on which a control mechanism 2, a sealing detection box 3, an air supply mechanism 4, a connecting mechanism 5 and a water supply mechanism 6 are arranged.

[0042] Reference Figure 1 The base 1 includes a support plate 11, and a plurality of universal wheels 12 are arranged on the lower side of the support plate 11. Such a structural arrangement facilitates the movement of the air tightness detection device.

[0043] Reference Figure 1The control mechanism 2 includes a lifting platform, an operation panel, a control module and a display screen. The operation panel, the control module and the operation panel display screen are all arranged on the lifting platform. The lifting platform is arranged on a support plate 11, and a plurality of telescopic rods are arranged between the lifting platform and the support plate 11. The telescopic rods are arranged in a vertical direction, and the lower ends of the telescopic rods are connected to the support plate 11, and the upper ends of the telescopic rods are connected to the lifting platform. In this embodiment, the telescopic rods adopt electric push rods or electric lifting table legs. The cooperation of the control panel, the control module and the display screen is convenient for controlling and monitoring the operation of the air tightness detection device; and the cooperation of the lifting platform and the telescopic rods is convenient for adjusting the height of the lifting platform, so that the height of the lifting platform can be suitable for different staff members.

[0044] Reference Figure 1 and Figure 2 The sealing detection box 3, the air supply mechanism 4 and the connecting mechanism 5 are all arranged on the support plate 11. The air supply mechanism 4 includes an air inlet pipe 41 and a blower 42. One end of the air inlet pipe 41 is connected to the blower 42, and the other end is connected to the sealing detection box 3. One end of the connecting pipe 51 extends into the sealing detection box 3, and the other end is provided with a connector 7. The sealing detection box 3 is provided with a solenoid valve 31, one end of the solenoid valve 31 is connected to the connecting pipe 51, and the other end is connected to the internal space of the sealing detection box 3.

[0045] Since the blower 42, the air inlet pipe 41, the sealing detection box 3, the solenoid valve 31 and the connecting pipe 51 are connected in sequence, when the connecting pipe 51 is connected to the corresponding pipe to be tested through the connector 7, air can be introduced into the pipe to be tested, thereby meeting the air tightness detection requirements.

[0046] Reference Figure 1 and Figure 2 A pressure gauge 52 is provided on the connecting pipe 51. With the pressure gauge 52, after the air pressure in the tested pipe increases, the electromagnetic valve 31 is closed, and the pressure gauge 52 can detect the air pressure in the tested pipe. If there is a pressure change, it indicates that the ventilation and air conditioning being tested is not airtight.

[0047] Reference Figure 1 and Figure 2 The water supply mechanism 6 is arranged on the support plate 11, and includes a water inlet pipe 61, a water pump 62 and a water tank 63. The water pump 62 is connected to the water tank 63. One end of the water inlet pipe 61 is connected to the water pump 62, and the other end is connected to the sealing detection box 3. The arrangement of the water supply mechanism 6 can inject water into the sealing detection box 3.

[0048] Reference Figure 1 and Figure 2A bubbling tube 32 is provided at one end of the solenoid valve 31 away from the connecting tube 51, the bubbling tube 32 is arranged in a vertical direction, and the upper end of the bubbling tube 32 is connected to the end of the solenoid valve 31 away from the connecting tube 51, the lower end of the bubbling tube 32 extends toward the bottom of the sealing detection box 3, and the lower end of the bubbling tube 32 is spaced apart from the bottom of the sealing detection box 3.

[0049] After air is introduced into the tested tube and the air pressure meets the requirement, the electromagnetic valve 31 is closed. At this time, the water supply mechanism 6 injects water into the sealing detection box 3, and the water in the sealing detection box 3 covers the lower end of the bubbling tube 32. Since the air pressure in the connecting tube 51 is relatively high at this time, if there is a leakage problem in the electromagnetic valve 31, the gas in the connecting tube 51 will flow into the bubbling tube 32 and then be discharged into the water to generate bubbles; on the contrary, if the electromagnetic valve 31 is intact, no bubbles will be generated in the water. This can realize the detection of the air tightness of the electromagnetic valve 31.

[0050] Reference Figure 1 and Figure 2 A bubble monitor 33 is provided in the sealing detection box 3. In this embodiment, the bubble monitor 33 is a camera device or a visual detection device. The bubble monitor 33 is arranged horizontally opposite to the lower opening of the bubbling tube 32. The bubble monitor 33 can automatically detect whether bubbles are generated at the lower opening of the bubbling tube 32.

[0051] Reference Figure 1 and Figure 2 A liquid level sensor 34 is provided on the inner wall of the sealing detection box 3. The liquid level sensor 34 is located at the lower side of the electromagnetic valve 31 in the vertical direction. At the same time, the liquid level sensor 34 is located at the lower side of the connection between the air inlet pipe 41 and the sealing detection box 3, and the liquid level sensor 34 is located at the upper side of the lower end opening of the bubbling tube 32. The setting of the liquid level sensor 34 can detect the liquid level in the sealing detection box 3 to prevent excessive water in the sealing detection box 3.

[0052] Reference Figure 1 and Figure 3 The connector 7 includes a sleeve 72 and an inserting tube 71, one end of which is sleeved on the outside of the connecting tube 51. The sleeve 72 is sleeved on the outside of the inserting tube 71, and the outer wall of the inserting tube 71 along its own axial direction toward the connecting tube 51 is fixedly connected with the inner wall of the corresponding end of the sleeve 72; the outer wall of the inserting tube 71 along its own axial direction away from the connecting tube 51 is spaced from the inner wall of the corresponding end of the sleeve 72, so that an inserting groove 73 is formed between the inserting tube 71 and the sleeve 72.

[0053] The connector 7 realizes the installation of the connector 7 and the connecting tube 51 through the inserting tube 71, and the formation of the inserting groove 73 realizes the installation of the connector 7 and the measured tube, which makes it easy for the connector 7 to realize the connection between the connecting tube 51 and the measured tube.

[0054] Reference Figure 4 and Figure 5 The cannula 71 is provided with a first sealing ring 711, which is coaxially arranged with the cannula 71. The cannula 71 has a first annular groove 712 at one end thereof away from the connecting tube 51 along its own axial direction, and the first sealing ring 711 is coaxially plugged with the first annular groove 712 at one end thereof along its own axial direction, and the first sealing ring 711 is arranged to expand outwardly in a direction away from its own central axis along its own radial direction.

[0055] Reference Figure 4 and Figure 6 The structural setting of the first sealing ring 711 enables the edge of the first sealing ring 711 to protrude from the outer wall of the insert tube 71, so that when the measured tube is installed on the connector 7, the outer side of the first sealing ring 711 can contact the inner wall of the measured tube, thereby increasing the sealing effect.

[0056] Reference Figure 4 and Figure 5 A second sealing ring 713 is sleeved on the outer side of the insert tube 71 , a second annular groove 714 is opened on the outer side of the insert tube 71 , and the second sealing ring 713 is inserted into the second annular groove 714 .

[0057] The provision of the second sealing ring 713 can further enhance the sealing effect between the cannula 71 and the tube to be tested.

[0058] Reference Figure 4 and Figure 5 , a third sealing ring 715 is sleeved on the outer side of the insert tube 71, and the second sealing ring 713 is located between the first sealing ring 711 and the third sealing ring 715 along its own axial direction. An extrusion ring groove 716 is provided on the outer side of the insert tube 71, and the third sealing ring 715 is located in the extrusion ring groove 716. A resistance ring 717 is sleeved on the outer side of the insert tube 71, and the resistance ring 717 is located in the extrusion ring groove 716. The resistance ring 717 is slidably connected with the inner wall of the extrusion ring groove 716 along its own axial direction. In addition, the third sealing ring 715 is located between the resistance ring 717 and the second sealing ring 713 along its own axial direction, and one end of the resistance ring 717 is in resistance with the third sealing ring 715.

[0059] When the abutment ring 717 is slid, one end of the abutment ring 717 will press against the third sealing ring 715, causing the third sealing ring 715 to deform, and the outer wall of the third sealing ring 715 to bulge away from the central axis. When the measured tube is installed on the connector 7, the sealing between the outer wall of the third sealing ring 715 and the inner wall of the measured tube can be increased by adjusting the position of the abutment ring 717. This can further increase the sealing effect between the connector 7 and the measured tube.

[0060] Specifically, refer to Figure 5 and Figure 7The inner wall of the abutment ring 717 is provided with an internal thread, the inner wall of the extrusion ring groove 716 is provided with an external thread, and the inner wall of the abutment ring 717 is connected to the corresponding inner wall of the extrusion ring groove 716 by threads. When the abutment ring 717 is screwed, the abutment ring 717 moves along its own axial direction through the threaded connection, realizing the sliding connection between the abutment ring 717 and the inner wall of the extrusion ring groove 716, and due to the setting of the threaded connection, it is possible to prevent the third sealing ring 715 from resetting the abutment ring 717.

[0061] Reference Figure 4 and Figure 7 The first clash bevel 7171 is provided on the side of the clash ring 717 along its own axial direction facing the third sealing ring 715. The first clash bevel 7171 extends incline along the axial direction of the clash ring 717 toward the side of the third sealing ring 715 and toward the central axis of the clash ring 717. The second clash bevel 7151 is provided on the side of the third sealing ring 715 facing the clash ring 717. The first clash bevel 7171 and the second clash bevel 7151 are matched. When one end of the clash ring 717 clashes with the third sealing ring 715, the first clash bevel 7171 and the second clash bevel 7151 are in contact.

[0062] Through the cooperation between the first interference bevel 7171 and the second interference bevel 7151 , when the interference ring 717 is twisted, the interference ring 717 can make the third sealing ring 715 deform more greatly, thereby further increasing the sealing effect of the third sealing ring 715 .

[0063] Reference Figure 3 and Figure 8 The sleeve 72 includes a limiting tube 721 , which is sleeved on the outside of the insertion tube 71 , and the inner wall of the limiting tube 721 is fixedly connected to the outer wall of the insertion tube 71 .

[0064] Reference Figure 3 and Figure 8 The sleeve 72 also includes an external threaded tube 722, which is sleeved on one end of the limiting tube 721, and the external threaded tube 722 is slidably connected to the limiting tube 721 along its own axial direction.

[0065] Reference Figure 3 and Figure 8A plurality of sliding reset members 723 are arranged between the external threaded tube 722 and the position limiting tube 721, and the plurality of sliding reset members 723 are arranged in sequence along the circumference of the position limiting tube 721. The sliding reset member 723 includes a slider, a slide bar 7231 and a reset spring 7232. A sliding long groove 7211 is provided on the outer wall of the position limiting tube 721. The length direction of the sliding long groove 7211 is arranged along the axial direction of the position limiting tube 721. The slide bar 7231 is located in the sliding long groove 7211. The length direction of the slide bar 7231 is arranged along the length direction of the sliding long groove 7211. One end of the slide bar 7231 in the length direction is fixedly connected to the inner wall corresponding to the length direction of the sliding long groove 7211. The slider is arranged in the sliding long groove 7211, and the slider is sleeved on the slide bar 7231. The slider is slidably connected to the slide bar 7231 and the inner wall of the sliding long groove 7211 along the length direction of the slide bar 7231. The return spring 7232 is sleeved on the outside of the sliding rod 7231 , and one end of the return spring 7232 is connected to the sliding block, and the other end is connected to the inner wall corresponding to the sliding long groove 7211 .

[0066] Then the slider can slide along the axial direction of the limiting tube 721, and the cooperation between the sliding long groove 7211 and the sliding rod 7231 can guide the slider and improve the stability of the slider movement, and the reset spring 7232 can realize the automatic reset of the slider.

[0067] Reference Figure 3 and Figure 8 The slider is fixedly connected to the external threaded tube 722 along one side of the axial direction of the limit tube 721, and is connected to the return spring 7232 on the other side. In this embodiment, the return spring 7232 is always in a compressed state. Therefore, the provision of a plurality of sliding return members 723 improves the sliding stability of the external threaded tube 722 and can ensure that the external threaded tube 722 is returned in time.

[0068] Reference Figure 3 and Figure 8 The external threaded tube 722 is also provided with a clamping assembly 724, which includes a plurality of external threaded plates 7241, which are located at one end of the external threaded tube 722 away from the limiting tube 721, and the plurality of external threaded plates 7241 are evenly spaced in sequence along the circumference of the external threaded tube 722, and the external threaded plates 7241 are fixedly connected to the external threaded tube 722. The external threaded plates 7241 are arc-shaped plates, and the outer wall of the external threaded plates 7241 is flush with the outer wall of the external threaded tube 722, and the end of the external threaded plates 7241 away from the external threaded tube 722 is tilted and tilted in a direction away from the central axis of the external threaded tube 722.

[0069] Reference Figure 3 and Figure 8 The clamping assembly 724 also includes a locking ring 7242, which is sleeved on the outside of the external threaded tube 722, and the inner wall of the locking ring 7242 is connected to the outer wall of the external threaded tube 722 through threads.

[0070] When the locking ring 7242 is turned, due to the threaded connection, the locking ring 7242 can move along its own axis on the external threaded tube 722. When the locking ring 7242 moves to the outside of the external threaded plate 7241, the inner wall of the locking ring 7242 is threadedly connected to the outer walls of the external threaded plates 7241. When the locking ring 7242 moves toward the external threaded plates 7241, the locking ring 7242 will contact the external threaded plates 7241 and move closer to each other.

[0071] The clamping assembly 724 is set up so that when the connector 7 is installed on the measured tube, the locking ring 7242 is turned to move the locking ring 7242 to the outside of the plurality of external threaded plates 7241. At this time, the plurality of external threaded plates 7241 cooperate to press the measured tube against the outside of the insert tube 71, thereby improving the stability and sealing of the connection between the measured tube and the connector 7.

[0072] Reference Figure 3 and Figure 8 A plurality of clamping blocks 7243 are arranged on the inner wall of the external thread plate 7241. The length direction of the clamping blocks 7243 is arranged along the axial direction of the external thread tube 722. The plurality of clamping blocks 7243 are arranged in sequence and at intervals on the inner wall of the corresponding external thread plate 7241 along the circumferential direction of the external thread tube 722. The arrangement of the clamping blocks 7243 can improve the clamping effect of the external thread plate 7241 on the measured tube.

[0073] In this embodiment, refer to Figure 4 and Figure 8 The second sealing ring 713 and the third sealing ring 715 are both located between opposite sides of the external threaded plate 7241 along the axial direction of the external threaded tube 722. Such a structural arrangement enables the external threaded plate 7241 to compress the second sealing ring 713 and the third sealing ring 715 when a plurality of external threaded plates 7241 clamp the measured tube, thereby increasing the sealing effect of the second sealing ring 713 and the third sealing ring 715.

[0074] The implementation principle of the embodiment of the present application is as follows: when performing an airtightness test, first, the tested tube needs to be installed, and the installation steps of the tested tube are as follows: slide the external threaded tube 722 on the limiting tube 721 so that the first sealing ring 711, the second sealing ring 713, the third sealing ring 715 and the contact ring 717 are all exposed, and then the tested tube is sleeved on the outside of the insert tube 71, and then the contact ring 717 is twisted to deform the third sealing ring 715, thereby increasing the sealing effect of the third sealing ring 715; loosen the external threaded tube 722, and the external threaded tube 722 automatically resets at this time, and twist the locking ring 7242. In the process of twisting the locking ring 7242, a number of external threaded plates 7241 gradually press the tested tube and the insert tube 71 tightly, thereby realizing the installation of the tested tube.

[0075] Then, an air tightness test is performed, and the blower 42 is started. The air in the blower 42 enters the tested pipe through the air inlet pipe 41, the sealing test box 3, the bubbling tube 32, the solenoid valve 31 and the connecting pipe 51. When the air pressure in the tested pipe meets the air tightness test requirements, the solenoid valve 31 is closed to maintain the pressure; the water pump 62 is started, and the water pump 62 pumps water into the sealing test box 3 until the liquid level sensor 34 detects that the liquid level in the sealing test box 3 meets the requirements, and then the water supply is stopped; the data of the pressure gauge 52 on the connecting pipe 51 is monitored, and the lower end of the bubbling tube 32 is monitored through the bubble monitor 33.

[0076] When bubbles are detected at the lower end of the bubble tube, it indicates that there is a leak in the solenoid valve 31; when a change is detected in the data of the pressure gauge 52 and no bubbles are generated at the lower end of the bubble tube, it indicates that the air tightness of the ventilation and air conditioning being tested is poor; when the data of the pressure gauge 52 remains unchanged and no bubbles are generated at the lower end of the bubble tube, it indicates that the solenoid valve 31 is intact and the air tightness of the ventilation and air conditioning being tested is good.

[0077] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A ventilation and air conditioning air tightness detection device, characterized in that: include: A sealing detection box (3), wherein a solenoid valve (31) is arranged in the sealing detection box (3), the solenoid valve (31) is communicated with the internal space of the sealing detection box (3), and a bubble monitor (33) for detecting bubbles is also arranged in the sealing detection box (3); An air supply mechanism (4) comprising a blower (42) and an air inlet pipe (41), wherein one end of the air inlet pipe (41) is connected to the blower (42), and the other end of the air inlet pipe (41) is connected to the sealing detection box (3); A connecting mechanism (5) comprising a connecting pipe (51), one end of the connecting pipe (51) extending into the sealing detection box (3) and communicating with the electromagnetic valve (31), and one end of the connecting pipe (51) away from the electromagnetic valve (31) being used for connecting to a pipe to be tested; and a pressure gauge (52) is provided on the connecting pipe (51); The water supply mechanism (6) comprises a water pump (62) and a water inlet pipe (61); one end of the water inlet pipe (61) is connected to the water pump (62), and the other end of the water inlet pipe (61) is connected to the sealing detection box (3).

2. A ventilation and air conditioning air tightness detection device according to claim 1, characterized in that: A bubbling tube (32) is also provided in the sealing detection box (3). The bubbling tube (32) is arranged in a vertical direction, the upper end of the bubbling tube (32) is connected to an end of the solenoid valve (31) away from the connecting tube (51), and the lower end is spaced apart from the bottom of the sealing detection box (3).

3. A ventilation and air conditioning air tightness detection device according to claim 2, characterized in that: A liquid level sensor (34) is also provided in the sealing detection box (3), and the liquid level sensor (34) is located at the lower side of the solenoid valve (31) in the vertical direction, and the liquid level sensor (34) is located at the upper side of the lower end surface of the bubbling tube (32) in the vertical direction.

4. A ventilation and air conditioning air tightness detection device according to claim 1, characterized in that: The connecting pipe (51) is provided with a connector (7) for connecting to a measured pipe, and the connector (7) is located at an end of the connecting pipe (51) away from the solenoid valve (31).

5. A ventilation and air conditioning air tightness detection device according to claim 4, characterized in that: The connector (7) comprises a sleeve (72) and an insertion tube (71), one end of the insertion tube (71) is sleeved on the outside of the connecting tube (51), the sleeve (72) is sleeved on the outside of the insertion tube (71), and the inner side wall of one end of the sleeve (72) facing the connecting tube (51) is fixedly connected to the outer side wall of the insertion tube (71), and the inner side wall of one end of the sleeve (72) away from the connecting tube (51) is spaced apart from the outer side wall of the insertion tube (71).

6. A ventilation and air conditioning air tightness detection device according to claim 5, characterized in that: A third sealing ring (715) is sleeved on the outer side of one end of the insertion tube (71) away from the connecting tube (51).

7. A ventilation and air conditioning air tightness detection device according to claim 6, characterized in that: An extrusion ring groove (716) is formed on the outer side of the insert tube (71), and the third sealing ring (715) is located in the extrusion ring groove (716); The outer side of the insertion tube (71) is sleeved with a resistance ring (717), the resistance ring (717) is located in the extrusion ring groove (716), and the resistance ring (717) is slidably connected to the inner side wall of the extrusion ring groove (716) along its own axial direction; One axial end of the abutment ring (717) abuts against the third sealing ring (715), and the abutment ring (717) is located on a side of the third sealing ring (715) facing the connecting pipe (51).

8. A ventilation and air conditioning air tightness detection device according to claim 7, characterized in that: The inner side wall of the abutment ring (717) is connected to the inner side wall corresponding to the extrusion ring groove (716) via threads.

9. A ventilation and air conditioning air tightness detection device according to claim 5, characterized in that: The sleeve (72) comprises a limiting tube (721), the limiting tube (721) is sleeved on the outside of the insertion tube (71), and the inner wall of the limiting tube (721) is fixedly connected to the outer wall of the insertion tube (71); An externally threaded tube (722) is sleeved on one end of the limiting tube (721) away from the connecting tube (51) along its own axial direction, and the externally threaded tube (722) is slidably connected to the limiting tube (721) along its own axial direction; A clamping assembly (724) for clamping the tube to be tested is provided at one end of the externally threaded tube (722) away from the connecting tube (51).

10. A ventilation and air conditioning air tightness detection device according to claim 9, characterized in that: The clamping assembly (724) comprises a plurality of external threaded plates (7241), wherein the external threaded plates (7241) are located at one end of the external threaded tube (722) away from the connecting tube (51), and the plurality of external threaded plates (7241) are arranged in sequence and spaced apart along the circumference of the external threaded tube (722); A locking ring (7242) is sleeved on the outside of the externally threaded tube (722), and the locking ring (7242) is connected to the externally threaded tube (722) via threads; When the locking ring (7242) moves in a direction away from the connecting pipe (51), the locking ring (7242) abuts against a plurality of the external threaded plates (7241) to move closer to each other.

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