A portable airtightness detector

Abstract

The present invention discloses a portable airtightness detector, specifically relating to the technical field of airtightness detection. It includes an instrument outer frame. In the middle of the instrument outer frame, there is an air inlet pump system. The air inlet end of the air inlet pump system is fixedly installed with an air inlet pipe, and the air outlet end of the air inlet pump system is fixedly installed with an air outlet pipe. The end of the air outlet pipe is fixedly installed with a pressure sensor. The display module of the pressure sensor is installed on the upper surface of the instrument outer frame. One end of the pressure sensor away from the air outlet pipe is fixedly installed with a guide pipe. At the end of the guide pipe away from the pressure sensor, there is a connection mechanism. The end of the air inlet pipe is fixedly installed with a connecting elbow. In the present invention, the air inlet pump system, the pressure sensor, the connection mechanism and the air outlet mechanism in this airtightness detector are installed in the instrument outer frame. The winding tube is evenly wound on the rotating tube between the limiting discs, reducing the volume of the entire airtightness detector and facilitating portable use.

Description

Technical Field

[0001] The present invention relates to the technical field of airtightness detection, and specifically relates to a portable airtightness detector. Background Technique

[0002] An airtightness detector is a device used to detect the airtightness of an object (i.e., the ability to prevent gas leakage). Airtightness detection is an important link to ensure product quality and safety, especially when it comes to products involving gas or liquid seals, and is widely used in various industries, including manufacturing, automotive, aerospace, and medical, etc.;

[0003] When processing and manufacturing new energy vehicles, it is necessary to detect the airtightness of some parts of the vehicle to ensure product quality and safety. However, there are still some problems in the specific use of existing airtightness detectors: they are relatively large in volume and mostly fixedly installed on the detection station, and the product needs to be transported to the detection station for detection, which is rather troublesome to use. For this reason, we propose a portable airtightness detector to solve the above problems. Summary of the Invention

[0004] The purpose of the present invention is to provide a portable airtightness detector to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A portable airtightness detector, including an instrument outer frame. An air inlet pump system is provided in the middle of the instrument outer frame. An air inlet pipe is fixedly installed at the air inlet end of the air inlet pump system, and an air outlet pipe is fixedly installed at the air outlet end of the air inlet pump system. A pressure sensor is fixedly installed at the end of the air outlet pipe. The display module of the pressure sensor is installed on the upper surface of the instrument outer frame. A conduit is fixedly installed at one end of the pressure sensor away from the air outlet pipe. A connection mechanism is provided at one end of the conduit away from the pressure sensor. A connection elbow is fixedly installed at the end of the air inlet pipe, and an air outlet mechanism is fixedly installed at the end of the connection elbow.

[0006] Preferably, the connecting mechanism includes two rotation brackets symmetrically distributed. The rotation brackets are fixedly installed on the inner lower wall of the instrument outer frame. A rotation tube is rotatably installed at the top of the rotation bracket. Limiting disks are fixedly installed at both outer ends of the rotation tube. A winding tube is arranged between the limiting disks. One end of the winding tube is fixedly clamped in the middle of the rotation tube. One end of the winding tube extends into the rotation tube and is vertically connected with a connecting cross tube. A sealing rotating part is fixedly clamped at the end of the air guide tube far away from the air pressure sensor. One end of the connecting cross tube far away from the winding tube extends out of the end of the rotation tube and is fixedly clamped in the middle of the sealing rotating part. A connecting head is fixedly installed at the end of the winding tube far away from the connecting cross tube. An installation frame is arranged outside the connecting head. The installation frame is fixedly installed on the inner upper wall of the instrument outer frame. The connecting head is detachably installed on the installation frame.

[0007] Preferably, a first bevel gear is fixedly installed at one end of the rotation tube. A second bevel gear is meshed and connected to the bottom of the first bevel gear. A driving vertical shaft is fixedly installed in the middle of the second bevel gear. A rotation cross frame is rotatably installed on the outer side of the driving vertical shaft. The rotation cross frame is fixedly installed on the outer side of the rotation bracket. A driving motor is fixedly installed on one side of the rotation bracket close to the rotation cross frame. The driving end of the driving motor and the bottom end of the driving vertical shaft are fixedly installed.

[0008] Preferably, the air treatment mechanism includes a filtering outer frame. A third bracket is fixedly installed at the top end of the filtering outer frame. The third bracket is fixedly installed on the inner upper wall of the instrument outer frame. An air inlet pipe is integrally formed on one side of the filtering outer frame. One end of the air inlet pipe far away from the filtering outer frame is fixedly clamped on the instrument outer frame. One end of the air inlet pipe far away from the filtering outer frame extends out of the outside of the instrument outer frame and is fixedly clamped with an outer filter element. An exhaust pipe corresponding to the air inlet pipe is integrally formed on one side of the filtering outer frame close to the air inlet pipe. The exhaust pipe and the air inlet pipe are directly connected. The end of the exhaust pipe and the end of the connecting elbow are fixedly installed. A filtering inner frame is movably clamped in the filtering outer frame. Two symmetrically distributed filtering through grooves are formed on the outer side of the filtering inner frame. One of the filtering through grooves is communicated with the exhaust pipe and the air inlet pipe. A cover is detachably installed on the filtering outer frame at the position of the other filtering through groove. Outer ring frames are movably clamped in the filtering through grooves. A fixing screw is movably clamped inside the outer ring frame. The end of the fixing screw is threadedly installed on the filtering inner frame. A filtering inner core is fixedly clamped in the middle of the outer ring frame. A rotating vertical shaft is installed in the middle of the filtering inner frame. The rotating vertical shaft is rotatably installed in the middle of the filtering outer frame.

[0009] Preferably, a first gear extends from the bottom of the rotating vertical shaft and extends out of the bottom end of the filter outer frame and is fixedly installed. A second gear is meshed and connected to the outside of the first gear. A one-way bearing is fixedly installed in the middle of the second gear. A gear shaft is fixedly clamped in the middle of the one-way bearing. An auxiliary seat is fixedly installed on the outer wall of the filter outer frame. The gear shaft is rotatably installed on the auxiliary seat.

[0010] Preferably, a pulley drive group is provided between the driving vertical shaft and the gear shaft. The pulley drive group includes two pulleys and a transmission belt movably sleeved on the outside of the two pulleys. The two pulleys are respectively fixedly installed on the outside of the corresponding driving vertical shaft and the gear shaft.

[0011] Preferably, a first open frame is detachably installed on one side of the outer wall of the instrument frame close to the connector, and a second open frame is detachably installed on one side of the outer wall of the instrument frame close to the cover.

[0012] Preferably, a first bracket is fixedly installed at the bottom end of the air inlet pump system. The first bracket is fixedly installed on the inner lower wall of the instrument frame. A second bracket is fixedly installed on the air pressure sensor. The second bracket is fixedly installed on the inner lower wall of the instrument frame.

[0013] Preferably, a control module is fixedly installed on the upper surface of the instrument frame. A handle is fixedly installed at the top end of the instrument frame. A plurality of support bases are fixedly installed at the bottom end of the instrument frame.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] 1. In this airtightness detector, the air inlet pump system, the air pressure sensor, the connection mechanism and the air treatment mechanism are installed in the instrument frame. The winding tube is evenly wound on the rotating tube between the limiting disks, reducing the volume of the entire airtightness detector and facilitating carrying and use.

[0016] 2. By setting the air treatment mechanism, the incoming air can be filtered multiple times to prevent impurities in the external air from being introduced into the new energy vehicle parts and affecting the new energy vehicle parts, thereby improving the use effect of the entire airtightness detector.

[0017] 3. By setting the air treatment mechanism in cooperation with the connection mechanism, while the winding tube is evenly wound, the filter inner frame can be synchronously controlled to rotate slowly, and the positions of the two filter through slots can be flexibly adjusted to disassemble, clean or replace the old filter inner core. Description of the Drawings

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0019] Figure 1 It is a schematic structural diagram of the present invention.

[0020] Figure 2 It is a schematic structural connection diagram of the present invention after disassembly.

[0021] Figure 3 It is a schematic structural connection diagram of the air intake pump system, the connection mechanism and the air treatment mechanism in the present invention.

[0022] Figure 4 For the present invention Figure 3 An enlarged view of part A in it.

[0023] Figure 5 It is a schematic structural diagram of the connection mechanism in the present invention.

[0024] Figure 6 It is a schematic structural diagram of the air treatment mechanism in the present invention.

[0025] Figure 7 For the present invention Figure 6 An enlarged view of part B in it.

[0026] Figure 8 It is a schematic structural diagram of the air treatment mechanism in the present invention from another angle.

[0027] In the figure: 1. Instrument outer frame; 11. Control module; 12. Handle; 13. First opening frame; 14. Second opening frame; 15. Support base; 2. Intake pump system; 21. First bracket; 22. Pressure sensor; 221. Second bracket; 23. Air duct; 231. Sealed rotating part; 201. Intake pipe; 202. Exhaust pipe; 203. Connecting elbow; 3. Connecting mechanism; 31. Rotating bracket; 32. Rotating pipe; 321. First bevel gear; 322. Second bevel gear; 323. Driving vertical shaft; 324. Rotating cross frame; 325. Driving motor; 33. Limiting disc; 34. Winding pipe; 341. Connecting cross pipe; 35. Connector; 351. Mounting frame; 4. Air treatment mechanism; 41. Filter outer frame; 411. Intake pipe; 4111. Outer filter element; 412. Exhaust pipe; 413. Cover; 42. Filter inner frame; 421. Filter through slot; 43. Outer ring frame; 431. Fixing screw; 432. Filter inner core; 44. Rotating vertical shaft; 45. First gear; 46. Second gear; 4611. One-way bearing; 461. Gear shaft; 462. Auxiliary seat; 5. Pulley drive group; 6. Third bracket. Detailed implementation mode

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

[0029] Embodiment: As Figure 1-8 shown, the present invention provides a portable airtightness detector, including an instrument outer frame 1. An intake pump system 2 is provided in the middle of the instrument outer frame 1. An intake pipe 201 is fixedly installed at the intake end of the intake pump system 2. An exhaust pipe 202 is fixedly installed at the exhaust end of the intake pump system 2. A pressure sensor 22 is fixedly installed at the end of the exhaust pipe 202. The display module of the pressure sensor 22 is installed on the upper surface of the instrument outer frame 1. One end of the pressure sensor 22 away from the exhaust pipe 202 is fixedly installed with an air duct 23. A connecting mechanism 3 is provided at the end of the air duct 23 away from the pressure sensor 22. A connecting elbow 203 is fixedly installed at the end of the intake pipe 201. An air treatment mechanism 4 is fixedly installed at the end of the connecting elbow 203. A control module 11 is fixedly installed on the upper surface of the instrument outer frame 1. A handle 12 is fixedly installed at the top of the instrument outer frame 1. A plurality of support bases 15 are fixedly installed at the bottom of the instrument outer frame 1. The volume of this airtightness detector is small. The intake pump system 2, the pressure sensor 22, the connecting mechanism 3 and the air treatment mechanism 4 are installed in the instrument outer frame 1. With the cooperation of the handle 12, it is convenient to hold and carry, improving the use effect of the entire airtightness detector.

[0030] The connecting mechanism 3 includes two symmetrically distributed rotating brackets 31. The rotating brackets 31 are fixedly installed on the inner lower wall of the instrument outer frame 1. A rotating tube 32 is rotatably installed at the top of the rotating bracket 31. Limiting discs 33 are fixedly installed at both outer ends of the rotating tube 32. A winding tube 34 is arranged between the limiting discs 33. In the initial state, the winding tube 34 is evenly wound on the rotating tube 32 between the limiting discs 33, reducing the volume of the entire airtightness detector, facilitating portability, and facilitating the subsequent unwinding and winding of the winding tube 34 for use. One end of the winding tube 34 is fixedly clamped in the middle of the rotating tube 32. One end of the winding tube 34 extends into the rotating tube 32 and is vertically connected with a connecting cross tube 341. The end of the air guide tube 23 far from the air pressure sensor 22 is fixedly provided with a sealed rotating member 231. The end of the connecting cross tube 341 far from the winding tube 34 extends out of the end of the rotating tube 32 and is fixedly clamped in the middle of the sealed rotating member 231. By providing the sealed rotating member 231, when the connecting cross tube 341 rotates, it does not affect the sealed connection between the connecting cross tube 341 and the air guide tube 23;

[0031] A connecting head 35 is fixedly installed at one end of the winding tube 34 far from the connecting cross tube 341. An installation frame 351 is arranged outside the connecting head 35. The installation frame 351 is fixedly installed on the inner upper wall of the instrument outer frame 1. The connecting head 35 is detachably installed on the installation frame 351 for placing the connecting head 35. A first open frame 13 is detachably installed on one side of the outer wall of the instrument outer frame 1 close to the connecting head 35. During use, the first open frame 13 is disassembled and opened, the connecting head 35 is taken out, and the connecting head 35 is connected to the new energy vehicle parts to be subjected to airtightness detection.

[0032] A first bevel gear 321 is fixedly installed at one end of the rotating tube 32. A second bevel gear 322 is meshed and connected to the bottom of the first bevel gear 321. A driving longitudinal shaft 323 is fixedly installed in the middle of the second bevel gear 322. A rotating cross frame 324 is rotatably installed outside the driving longitudinal shaft 323. The rotating cross frame 324 is fixedly installed outside the rotating bracket 31. A driving motor 325 is fixedly installed on one side of the rotating bracket 31 close to the rotating cross frame 324. The driving end of the driving motor 325 is fixedly installed with the bottom end of the driving longitudinal shaft 323. By controlling the driving motor 325 to start, the driving longitudinal shaft 323 and the second bevel gear 322 are controlled to drive the first bevel gear 321 and the rotating tube 32 to rotate, so as to wind the winding tube 34. On the contrary, by controlling the driving motor 325 to start, the driving longitudinal shaft 323 and the second bevel gear 322 are controlled to drive the first bevel gear 321 and the rotating tube 32 to rotate in the reverse direction, so as to unwind the winding tube 34.

[0033] The air inlet mechanism 4 includes a filter outer frame 41. A third bracket 6 is fixedly installed at the top end of the filter outer frame 41, and the third bracket 6 is fixedly installed on the inner upper wall of the instrument outer frame 1. An air inlet pipe 411 is integrally formed on one side of the filter outer frame 41. One end of the air inlet pipe 411 away from the filter outer frame 41 is fixedly clamped on the instrument outer frame 1. One end of the air inlet pipe 411 away from the filter outer frame 41 extends out of the outside of the instrument outer frame 1 and is fixedly clamped with an outer filter element 4111. A corresponding exhaust pipe 412 is integrally formed on one side of the filter outer frame 41 close to the air inlet pipe 411. The exhaust pipe 412 and the air inlet pipe 411 are directly connected. The end of the exhaust pipe 412 and the end of the connecting elbow 203 are fixedly installed. A filter inner frame 42 is movably clamped in the filter outer frame 41. Two symmetrically distributed filter through slots 421 are formed on the outer side of the filter inner frame 42. One of the filter through slots 421 is communicated with the exhaust pipe 412 and the air inlet pipe 411. A cover 413 is detachably installed on the filter outer frame 41 at the position of the other filter through slot 421. A second opening frame 14 is detachably installed on one side of the outer wall of the instrument outer frame 1 close to the cover 413. Outer ring frames 43 are movably clamped in the filter through slots 421. A fixing screw 431 is movably clamped inside the outer ring frame 43. The end of the fixing screw 431 is threadedly installed on the filter inner frame 42. A filter inner core 432 is fixedly clamped in the middle of the outer ring frame 43. A rotating longitudinal axis 44 is installed in the middle of the filter inner frame 42. The rotating longitudinal axis 44 is rotatably installed in the middle of the filter outer frame 41. During use, when the air inlet pump system 2 is controlled to be turned on, after the external air is primarily filtered by the outer filter element 4111, it is introduced into the corresponding filter through slot 421 through the air inlet pipe 411. After being secondary filtered by the corresponding filter inner core 432, it is introduced into the new energy vehicle parts to be detected for airtightness through the exhaust pipe 412, the connecting elbow 203, the air inlet pipe 201, the air outlet pipe 202, the air pressure sensor 22, the air guide pipe 23, the connecting cross pipe 341, the winding pipe 34, and the connecting head 35. After introducing a certain gas pressure, the introduction is stopped. The airtightness of the parts is detected by observing the value of the air pressure sensor 22. Thus, the incoming air can be filtered multiple times to prevent impurities in the external air from being introduced into the new energy vehicle parts and affecting the new energy vehicle parts, thereby improving the use effect of the entire airtightness detector.

[0034] The bottom of the rotating vertical shaft 44 extends out of the bottom end of the filter outer frame 41 and is fixedly installed with a first gear 45. A second gear 46 is meshed and connected to the outside of the first gear 45. A one-way bearing 4611 is fixedly installed in the middle of the second gear 46. A gear shaft 461 is fixedly clamped in the middle of the one-way bearing 4611. An auxiliary seat 462 is fixedly installed on the outer wall of the filter outer frame 41. The gear shaft 461 is rotatably installed on the auxiliary seat 462. When the filter inner core 432 needs to be disassembled and cleaned after filtering for a period of time, by controlling the rotation of the gear shaft 461, at this time, the inner and outer rings of the one-way bearing 4611 are self-locked. The rotation of the gear shaft 461 drives the second gear 46 to control the first gear 45 and the rotating vertical shaft 44 to rotate slowly, so as to control the slow rotation of the filter inner frame 42, and flexibly adjust the positions of the two filter through slots 421 on both sides, so that the new filter inner core 432 rotates to the positions of the exhaust pipe 412 and the intake pipe 411 for subsequent filtering, and the old filter inner core 432 rotates to the position of the cover 413. By sequentially disassembling the second opening frame 14, the cover 413, and the corresponding fixing screws 431, the outer ring frame 43 and the old filter inner core 432 at the corresponding positions are disassembled for cleaning or replacement. On the contrary, by controlling the reverse rotation of the gear shaft 461, at this time, the inner and outer rings of the one-way bearing 4611 are not self-locked, and the rotation of the gear shaft 461 will not drive the second gear 46 to control the first gear 45 and the rotating vertical shaft 44 to rotate slowly.

[0035] A pulley transmission group 5 is provided between the driving vertical shaft 323 and the gear shaft 461. The pulley transmission group 5 includes two pulleys and a transmission belt movably sleeved outside the two pulleys. The two pulleys are respectively fixedly installed on the outside of the corresponding driving vertical shaft 323 and the gear shaft 461. By setting the pulley transmission group 5, while the driving vertical shaft 323 rotates, with the transmission of the pulley transmission group 5, the corresponding gear shaft 461 is driven to rotate synchronously.

[0036] The bottom end of the air inlet pump system 2 is fixedly installed with a first bracket 21. The first bracket 21 is fixedly installed on the inner lower wall of the instrument outer frame 1. A second bracket 221 is fixedly installed on the air pressure sensor 22. The second bracket 221 is fixedly installed on the inner lower wall of the instrument outer frame 1.

[0037] Working principle: In the initial state, the winding tube 34 is evenly wound on the rotating tube 32 between the limiting discs 33, reducing the volume of the entire airtightness detector and facilitating portability. When in use, disassemble and open the first opening frame 13, take out the connector 35, control the driving motor 325 to start, and control the driving vertical shaft 323 and the second bevel gear 322 to drive the first bevel gear 321 and the rotating tube 32 to rotate in the reverse direction, so as to unwind the winding tube 34 and connect the connector 35 to the new energy vehicle parts to be tested for airtightness;

[0038] Subsequently, control the intake pump system 2 to start. After the external air is primarily filtered by the external filter element 4111, it is introduced into the corresponding filter through slot 421 through the intake pipe 411. After secondary filtration by the corresponding filter inner core 432, it is introduced into the new energy vehicle parts to be tested for airtightness through the exhaust pipe 412, connecting elbow 203, intake pipe 201, outlet pipe 202, air pressure sensor 22, air guide pipe 23, connecting cross pipe 341, winding pipe 34, and connector 35. After introducing a certain gas pressure, stop the introduction. Detect the airtightness of the parts by observing the value of the air pressure sensor 22. Thus, the incoming air can be filtered multiple times to prevent impurities in the external air from being introduced into the new energy vehicle parts and affecting the new energy vehicle parts;

[0039] After the detection is completed, control the drive motor 325 to control the drive vertical shaft 323, and the second bevel gear 322 drives the first bevel gear 321 and the rotating pipe 32 to rotate, thereby winding the winding pipe 34. While the drive vertical shaft 323 rotates, with the transmission of the pulley drive group 5, drive the corresponding gear shaft 461 to rotate synchronously. By controlling the rotation of the gear shaft 461, at this time, the inner and outer rings of the one-way bearing 4611 are self-locked. The rotation of the gear shaft 461 drives the second gear 46 to control the slow rotation of the first gear 45 and the rotating vertical shaft 44, thereby controlling the slow rotation of the filter inner frame 42 and flexibly adjusting the positions of the two filter through slots 421 on both sides, so that the new filter inner core 432 rotates to the positions of the exhaust pipe 412 and the intake pipe 411 for subsequent filtration, and the old filter inner core 432 rotates to the position of the cover 413. By sequentially disassembling the second open frame 14, the cover 413, and the corresponding fixing screws 431, the outer ring frame 43 and the old filter inner core 432 at the corresponding positions are disassembled for cleaning or replacement.

[0040] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A portable air tightness tester, comprising an instrument frame (1), characterized in that: An air intake pump system (2) is provided in the middle of the instrument outer frame (1); an air intake pipe (201) is fixedly installed at the air intake end of the air intake pump system (2); an air outlet pipe (202) is fixedly installed at the air outlet end of the air intake pump system (2); an air pressure sensor (22) is fixedly installed at the end of the air outlet pipe (202); a display module of the air pressure sensor (22) is installed on the upper surface of the instrument outer frame (1); an air guide pipe (23) is fixedly installed at one end of the air pressure sensor (22) away from the air outlet pipe (202); a connecting mechanism (3) is provided at one end of the air guide pipe (23) away from the air pressure sensor (22); a connecting elbow (203) is fixedly installed at the end of the air intake pipe (201); and an air outlet mechanism (4) is fixedly installed at the end of the connecting elbow (203); The connecting mechanism (3) comprises two symmetrically distributed rotating brackets (31), the rotating brackets (31) being fixedly mounted on the inner lower wall of the instrument outer frame (1), a rotating tube (32) being rotatably mounted on the top of the rotating bracket (31), both outer ends of the rotating tube (32) being fixedly mounted with limit plates (33), a winding tube (34) being arranged between the limit plates (33), one end of the winding tube (34) being fixedly clamped in the middle of the rotating tube (32), one end of the winding tube (34) extending into the rotating tube (32) and being vertically connected to a connecting transverse tube (341), the air guide One end of the tube (23) away from the air pressure sensor (22) is fixedly clamped with a sealing rotating member (231); one end of the connecting transverse tube (341) away from the winding tube (34) extends out of the end of the rotating tube (32) and is fixedly clamped in the middle of the sealing rotating member (231); one end of the winding tube (34) away from the connecting transverse tube (341) is fixedly mounted with a connecting head (35); a mounting frame (351) is provided on the outer side of the connecting head (35); the mounting frame (351) is fixedly mounted on the inner upper wall of the instrument outer frame (1); and the connecting head (35) is detachably mounted on the mounting frame (351); The air handling mechanism (4) comprises a filter outer frame (41), a third bracket (6) is fixedly mounted on the top of the filter outer frame (41), and the third bracket (6) is fixedly mounted on the inner upper wall of the instrument outer frame (1); an air inlet pipe (411) is integrally formed on one side of the filter outer frame (41), and one end of the air inlet pipe (411) away from the filter outer frame (41) is fixedly clamped on the instrument outer frame (1); one end of the air inlet pipe (411) away from the filter outer frame (41) extends out of the outer side of the instrument outer frame (1) and is fixedly clamped with an outer filter element (4111); a corresponding exhaust pipe (412) is integrally formed on one side of the filter outer frame (411) close to the air inlet pipe (411); the exhaust pipe (412) and the air inlet pipe (411) are directly connected, and the end of the exhaust pipe (412) and the end of the connecting elbow (203) are fixedly mounted; the filter outer frame (4 1) The movable card is provided with a filter inner frame (42), and the outer side of the filter inner frame (42) is provided with two symmetrically distributed filter slots (421), wherein one of the filter slots (421) and the exhaust pipe (412) and the intake pipe (411) are mutually communicated, and a cover (413) is detachably mounted on the filter outer frame (41) at the position of the other filter slot (421), and the movable card in each filter slot (421) is provided with an outer ring frame (43), and the inner movable card of the outer ring frame (43) is provided with a fixing screw (431), and the end of the fixing screw (431) is threadedly mounted on the filter inner frame (42), and the middle fixed card of the outer ring frame (43) is provided with a filter inner core (432), and a rotating longitudinal shaft (44) is mounted in the middle of the filter inner frame (42), and the rotating longitudinal shaft (44) is rotatably mounted in the middle of the filter outer frame (41).

2. A portable air tightness detector according to claim 1, characterized in that: A first bevel gear (321) is fixedly mounted on one end of the rotating tube (32); a second bevel gear (322) is meshedly connected to the bottom of the first bevel gear (321); a driving longitudinal shaft (323) is fixedly mounted on the middle of the second bevel gear (322); a rotating cross frame (324) is rotatably mounted on the outer side of the driving longitudinal shaft (323); the rotating cross frame (324) is fixedly mounted on the outer side of the rotating bracket (31); a driving motor (325) is fixedly mounted on a side of the rotating bracket (31) close to the rotating cross frame (324); a driving end of the driving motor (325) and the bottom end of the driving longitudinal shaft (323) are fixedly mounted.

3. A portable air tightness detector according to claim 2, characterized in that: The bottom of the rotating longitudinal shaft (44) extends out of the bottom end of the filter outer frame (41) and is fixedly mounted with a first gear (45); the outer side of the first gear (45) is meshingly connected with a second gear (46); a one-way bearing (4611) is fixedly mounted in the middle of the second gear (46); a gear shaft (461) is fixedly clamped in the middle of the one-way bearing (4611); an auxiliary seat (462) is fixedly mounted on the outer wall of the filter outer frame (41); and the gear shaft (461) is rotatably mounted on the auxiliary seat (462).

4. A portable air tightness detector according to claim 3, characterized in that: A pulley transmission group (5) is provided between the driving longitudinal shaft (323) and the gear shaft (461), the pulley transmission group (5) comprising two pulleys and a transmission belt movably sleeved on the outsides of the two pulleys, the two pulleys being respectively fixedly mounted on the outsides of the corresponding driving longitudinal shaft (323) and the gear shaft (461).

5. A portable air tightness detector according to claim 1, characterized in that: A first opening frame (13) is detachably mounted on one side of the outer wall of the instrument outer frame (1) close to the connector (35).

6. A portable air tightness detector according to claim 1, characterized in that: A second opening frame (14) is detachably mounted on one side of the outer wall of the instrument outer frame (1) close to the cover (413).

7. A portable air tightness detector according to claim 1, characterized in that: A first bracket (21) is fixedly mounted on the bottom end of the air intake pump system (2), and the first bracket (21) is fixedly mounted on the inner lower wall of the instrument outer frame (1). A second bracket (221) is fixedly mounted on the air pressure sensor (22), and the second bracket (221) is fixedly mounted on the inner lower wall of the instrument outer frame (1).

8. A portable air tightness detector according to claim 1, characterized in that: A control module (11) is fixedly mounted on the upper surface of the instrument outer frame (1), a handle (12) is fixedly mounted on the top end of the instrument outer frame (1), and a plurality of support bases (15) are fixedly mounted on the bottom end of the instrument outer frame (1).

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