Portable air tightness detector

Abstract

The invention discloses a portable air tightness detector, and particularly relates to the technical field of air tightness detection.The portable air tightness detector comprises an instrument outer frame, an air inlet pump system is arranged 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; an air pressure sensor is fixedly installed at the end of the air outlet pipe, a display module of the air pressure sensor is installed on the upper surface of the instrument outer frame, an air guide pipe is fixedly installed at the end, away from the air outlet pipe, of the air pressure sensor, and a connecting mechanism is arranged at the end, away from the air pressure sensor, of the air guide pipe. According to the air tightness detector, the air inlet pump system, the air pressure sensor, the connecting mechanism and the air treatment mechanism are installed in the instrument outer frame, the winding pipe is evenly wound on the rotating pipe between the limiting discs, the size of the whole air tightness detector is reduced, and the air tightness detector is convenient to carry and use.

Description

Technical Field

[0001] The invention relates to the technical field of airtightness detection, in particular to a portable airtightness detection instrument. Background Art

[0002] An airtightness tester is a device used to test the airtightness of an object (i.e. the ability to prevent gas leakage). Airtightness testing is an important part of ensuring product quality and safety, especially when it comes to products that are sealed with gas or liquid. It is widely used in various industries, including manufacturing, automotive, aerospace, and medical. During the processing and production of new energy vehicles, some parts of the vehicle need to be tested for air tightness to ensure product quality and safety. However, the existing air tightness testers still have some problems in specific use: they are large in size and are mostly fixedly installed on the testing station. The product needs to be transported to the testing station for testing, which is troublesome to use. Therefore, we propose a portable air tightness tester to solve the above problems. Summary of the invention

[0003] The purpose of the present invention is to provide a portable air tightness detector to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a portable air tightness tester, comprising an instrument frame, an air intake pump system is provided in the middle of the instrument frame, an air intake pipe is fixedly installed at the air intake end of the air intake pump system, an air outlet pipe is fixedly installed at the air outlet end of the air intake pump system, an air pressure sensor is fixedly installed at the end of the air outlet pipe, a display module of the air pressure sensor is installed on the upper surface of the instrument frame, an air guide pipe is fixedly installed at the end of the air pressure sensor away from the air outlet pipe, a connecting mechanism is provided at the end of the air intake pipe, a connecting elbow is fixedly installed at the end of the connecting elbow, and an air outlet mechanism is fixedly installed at the end of the connecting elbow.

[0005] Preferably, the connecting mechanism includes two symmetrically distributed rotating brackets, the rotating brackets are fixedly mounted on the inner lower wall of the instrument outer frame, a rotating tube is rotatably mounted on the top of the rotating bracket, limit plates are fixedly mounted on both ends of the outer side of the rotating tube, a winding tube is provided between the limit plates, one end of the winding tube is fixedly clamped in the middle part of the rotating tube, one end of the winding tube extends into the rotating tube and is vertically connected with a connecting cross tube, one end of the air guide tube away from the air pressure sensor is fixedly clamped with a sealing rotating part, one end of the connecting cross tube away from the winding tube extends out of the end of the rotating tube and is fixedly clamped in the middle part of the sealing rotating part, one end of the winding tube away from the connecting cross tube is fixedly mounted with a connecting head, a mounting bracket is provided on the outer side of the connecting head, the mounting bracket is fixedly mounted on the inner upper wall of the instrument outer frame, and the connecting head can be detachably mounted on the mounting bracket.

[0006] Preferably, a first bevel gear is fixedly installed at one end of the rotating tube, a second bevel gear is meshingly connected to the bottom of the first bevel gear, a driving longitudinal shaft is fixedly installed at the middle of the second bevel gear, a rotating cross frame is rotatably installed on the outer side of the driving longitudinal shaft, the rotating cross frame is fixedly installed on the outer side of the rotating bracket, a driving motor is fixedly installed on the side of the rotating bracket close to the rotating cross frame, and the driving end of the driving motor and the bottom end of the driving longitudinal shaft are fixedly installed.

[0007] Preferably, the air outlet mechanism comprises a filter outer frame, a third bracket is fixedly installed on the top of the filter outer frame, and 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 filter outer frame, and an end of the air inlet pipe away from the filter outer frame is fixedly connected to the instrument outer frame, and an end of the air inlet pipe away from the filter outer frame extends out of the outer frame of the instrument and is fixedly provided with an outer filter element, and a corresponding exhaust pipe is integrally formed on the side of the filter outer frame close to the air inlet pipe, the exhaust pipe and the air inlet pipe are directly connected, and the end of the exhaust pipe and the end of the connecting elbow are fixedly installed, and the A filter inner frame is provided on a movable card in the filter outer frame, and two symmetrically distributed filter slots are provided on the outer side of the filter inner frame, one of the filter slots and the exhaust pipe is connected to the air inlet pipe, and a cover is detachably installed on the filter outer frame at the position of the other filter slot, and an outer ring frame is provided with a movable card in the filter slot, and a fixing screw is provided on the inner movable card of the outer ring frame, and the end of the fixing screw is threadedly installed on the filter inner frame, and a filter inner core is provided on the middle fixed card of the outer ring frame, and a rotating longitudinal axis is installed in the middle of the filter inner frame, and the rotating longitudinal axis is rotatably installed in the middle of the filter outer frame.

[0008] Preferably, the bottom of the rotating longitudinal axis extends out of the bottom end of the filter outer frame and is fixedly installed with a first gear, the outer side of the first gear is meshingly connected with a second gear, the middle part of the second gear is fixedly installed with a one-way bearing, the middle part of the one-way bearing is fixedly clamped with a gear shaft, the outer wall of the filter outer frame is fixedly installed with an auxiliary seat, and the gear shaft is rotatably installed on the auxiliary seat.

[0009] Preferably, a pulley transmission group is provided between the driving longitudinal shaft and the gear shaft, and the pulley transmission group includes two pulleys and a transmission belt movably sleeved on the outside of the two pulleys, and the two pulleys are respectively fixedly mounted on the outside of the corresponding driving longitudinal shaft and gear shaft.

[0010] Preferably, a first open frame is detachably mounted on a side of the outer wall of the instrument outer frame close to the connector, and a second open frame is detachably mounted on a side of the outer wall of the instrument outer frame close to the cover.

[0011] Preferably, a first bracket is fixedly installed at the bottom end of the air intake pump system, and the first bracket is fixedly installed on the inner lower wall of the instrument outer frame. A second bracket is fixedly installed on the air pressure sensor, and the second bracket is fixedly installed on the inner lower wall of the instrument outer frame.

[0012] Preferably, a control module is fixedly mounted on the upper surface of the instrument outer frame, a handle is fixedly mounted on the top end of the instrument outer frame, and a plurality of support bases are fixedly mounted on the bottom end of the instrument outer frame.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. The air intake pump system, air pressure sensor, connecting mechanism and air outlet mechanism of the air tightness tester are installed in the outer frame of the instrument, and the winding tube is evenly wound on the rotating tube between the limit plates, which reduces the volume of the entire air tightness tester and is easy to carry and use.

[0014] 2. By setting up 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 components, thereby affecting the new energy vehicle parts and components, thereby improving the use effect of the entire air tightness tester.

[0015] 3. By setting up the air handling mechanism in conjunction with the connecting mechanism, the reel can be evenly reeled up while the filter inner frame can be controlled to rotate slowly, the positions of the filter slots on both sides can be flexibly adjusted, and the old filter inner core can be disassembled, cleaned or replaced. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of the structure of the present invention.

[0018] Figure 2 It is a schematic diagram of the structural connection after the present invention is split.

[0019] Figure 3 It is a schematic diagram of the structural connection of the air intake pump system, the connecting mechanism and the air handling mechanism in the present invention.

[0020] Figure 4 For the present invention Figure 3 Enlarged view of point A in the middle.

[0021] Figure 5 It is a structural schematic diagram of the connecting mechanism in the present invention.

[0022] Figure 6 It is a structural schematic diagram of the gas handling mechanism in the present invention.

[0023] Figure 7 For the present invention Figure 6 Enlarged view of point B in the middle.

[0024] Figure 8 It is a structural schematic diagram of the gas handling mechanism from another angle in the present invention.

[0025] In the figure: 1. Instrument frame; 11. Control module; 12. Handle; 13. First opening frame; 14. Second opening frame; 15. Support base; 2. Air intake pump system; 21. First bracket; 22. Air pressure sensor; 221. Second bracket; 23. Air guide tube; 231. Sealing rotating part; 201. Air intake pipe; 202. Air outlet pipe; 203. Connecting elbow; 3. Connecting mechanism; 31. Rotating bracket; 32. Rotating tube; 321. First bevel gear; 322. Second bevel gear; 323. Driving longitudinal axis; 324. Rotating horizontal frame; 325. Driving motor ; 33. Limiting plate; 34. Winding tube; 341. Connecting transverse tube; 35. Connecting head; 351. Mounting frame; 4. Air handling mechanism; 41. Filter outer frame; 411. Air inlet pipe; 4111. External filter element; 412. Exhaust pipe; 413. Sealing cover; 42. Filter inner frame; 421. Filter slot; 43. External ring frame; 431. Fixing screw; 432. Filter inner core; 44. Rotating longitudinal axis; 45. First gear; 46. Second gear; 4611. One-way bearing; 461. Gear shaft; 462. Auxiliary seat; 5. Pulley transmission group; 6. Third bracket. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] Example: Figure 1-8As shown, the present invention provides a portable air tightness detector, including an instrument outer frame 1, an air intake pump system 2 is arranged 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, and a connection is arranged at one end of the air guide pipe 23 away from the air pressure sensor 22 Mechanism 3, a connecting elbow 203 is fixedly installed at the end of the air inlet pipe 201, and an air outlet 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 on the top of the instrument outer frame 1, and a plurality of supporting bases 15 are fixedly installed on the bottom of the instrument outer frame 1. The air tightness detector is relatively small in size, and the air inlet pump system 2, the air pressure sensor 22, the connecting mechanism 3 and the air outlet mechanism 4 are installed in the instrument outer frame 1. The handle 12 is used together for easy hand-held carrying, which improves the use effect of the entire air tightness detector.

[0028] The connecting mechanism 3 includes two symmetrically distributed rotating brackets 31, the rotating brackets 31 are fixedly mounted on the inner lower wall of the instrument outer frame 1, a rotating tube 32 is rotatably mounted on the top of the rotating bracket 31, and both ends of the outer side of the rotating tube 32 are fixedly mounted with limit plates 33, and a winding tube 34 is arranged between the limit plates 33. In the initial state, the winding tube 34 is evenly wound on the rotating tube 32 between the limit plates 33, which reduces the volume of the entire air tightness detector, is easy to carry, and is convenient for subsequent unwinding of the winding tube 34 for use. One end is fixedly connected to the middle of the rotating tube 32, one end of the winding tube 34 extends into the rotating tube 32 and is vertically connected to the connecting transverse tube 341, one end of the air guide tube 23 away from the air pressure sensor 22 is fixedly connected 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 connected to the middle of the sealing rotating member 231, and by providing the sealing rotating member 231, when the connecting transverse tube 341 rotates, the sealing connection between the connecting transverse tube 341 and the air guide tube 23 is not affected; A connecting head 35 is fixedly installed at one end of the winding tube 34 away from the connecting cross tube 341, and a mounting bracket 351 is provided on the outer side of the connecting head 35. The mounting bracket 351 is fixedly installed on the inner upper wall of the instrument outer frame 1. The connecting head 35 can be detachably installed on the mounting bracket 351 to place the connecting head 35. A first opening frame 13 is detachably installed on one side of the outer wall of the instrument outer frame 1 close to the connecting head 35. When in use, the first opening 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 tested for air tightness.

[0029] The first bevel gear 321 is fixedly installed on one end of the rotating tube 32, and the second bevel gear 322 is meshed and connected with the bottom of the first bevel gear 321, and the middle part of the second bevel gear 322 is fixedly installed with a driving longitudinal shaft 323, and a rotating cross frame 324 is rotatably installed on the outer side of the driving longitudinal shaft 323, and the rotating cross frame 324 is fixedly installed on the outer side of the rotating bracket 31, and a driving motor 325 is fixedly installed on the side of the rotating bracket 31 close to the rotating cross frame 324, and the driving end of the driving motor 325 and the bottom end of the driving longitudinal shaft 323 are fixedly installed. The driving motor 325 is controlled to be turned on to control the driving longitudinal shaft 323, the second bevel gear 322 to drive the first bevel gear 321 and the rotating tube 32 to rotate, thereby winding the winding tube 34. On the contrary, the driving motor 325 is controlled to be turned on to control the driving longitudinal shaft 323, the second bevel gear 322 to drive the first bevel gear 321 and the rotating tube 32 to rotate in the opposite direction, thereby unwinding the winding tube 34.

[0030] The air handling mechanism 4 includes a filter outer frame 41, a third bracket 6 is fixedly installed on the top 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, and an end of the air inlet pipe 411 away from the filter outer frame 41 is fixedly connected to the instrument outer frame 1, and an 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 provided with an outer filter element 4111, and a corresponding exhaust pipe 412 is integrally formed on one side of the filter outer frame 41 close to the air inlet pipe 411, and the exhaust pipe 412 and the air inlet pipe The pipe 411 is straight-through, the end of the exhaust pipe 412 and the end of the connecting elbow 203 are fixedly installed, the filter outer frame 41 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, one of which is connected to the exhaust pipe 412 and the air inlet pipe 411, and the filter outer frame 41 at the position of the other filter slot 421 is detachably provided with a cover 413, and the outer wall of the instrument outer frame 1 is detachably provided with a second opening frame 14 near the cover 413, and the filter slots 421 are all provided with an outer ring frame 421. 43, the inner movable card of the outer ring frame 43 is provided with a fixing screw 431, the end of the fixing screw 431 is threadedly installed on the filter inner frame 42, the middle fixed card of the outer ring frame 43 is provided with a filter inner core 432, the middle of the filter inner frame 42 is provided with a rotating longitudinal axis 44, and the rotating longitudinal axis 44 is rotatably installed in the middle of the filter outer frame 41. When in use, the air intake pump system 2 is controlled to be turned on, and the external air is primary filtered through the outer filter element 4111, and then introduced into the corresponding filter slot 421 through the air inlet pipe 411, and after secondary filtering through the corresponding filter inner core 432, it is exhausted through the exhaust pipe 411. Tube 412, connecting elbow 203, air inlet pipe 201 and air outlet pipe 202, air pressure sensor 22, air guide pipe 23, connecting cross pipe 341, winding tube 34 and connecting head 35 are introduced into the new energy vehicle parts to be tested for air tightness. After a certain gas pressure is introduced, the introduction is stopped, and the air tightness of the parts is detected by observing the value of the air pressure sensor 22, so that 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 air tightness tester.

[0031] The bottom of the rotating longitudinal axis 44 extends out of the bottom end of the filter outer frame 41 and is fixedly installed with a first gear 45, the outer side of the first gear 45 is meshedly connected with a second gear 46, and the middle part of the second gear 46 is fixedly installed with a one-way bearing 4611, and the middle part of the one-way bearing 4611 is fixedly clamped with a gear shaft 461, and the outer wall of the filter outer frame 41 is fixedly installed with an auxiliary seat 462, and 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, the gear shaft 461 is controlled to rotate. At this time, the inner and outer rings of the one-way bearing 461 are self-locking, and the gear shaft 461 rotates to drive the second gear 46 to control the first gear 45 and the rotating longitudinal axis 44 to slowly Rotate, thereby controlling the filter inner frame 42 to rotate slowly, flexibly adjusting the positions of the filter slots 421 on both sides, so that the new filter inner core 432 is rotated to the exhaust pipe 412 and the air inlet pipe 411 for subsequent filtration, and the old filter inner core 432 is rotated to the position of the cover 413, and the second opening frame 14 and the cover 413 are disassembled in sequence, and the corresponding fixing screws 431 are used to disassemble the outer ring frame 43 and the old filter inner core 432 at the corresponding position for cleaning or replacement. On the contrary, by controlling the gear shaft 461 to rotate in the opposite direction, the inner and outer rings of the one-way bearing 4611 are not self-locking, and the rotation of the gear shaft 461 will not drive the second gear 46 to control the first gear 45 and the rotating longitudinal axis 44 to rotate slowly.

[0032] A pulley transmission group 5 is provided between the driving longitudinal shaft 323 and the gear shaft 461. The pulley transmission group 5 includes two pulleys and a transmission belt movably sleeved on the outer sides of the two pulleys. The two pulleys are respectively fixedly mounted on the outer sides of the corresponding driving longitudinal shaft 323 and the gear shaft 461. By setting the pulley transmission group 5, the driving longitudinal shaft 323 is rotated, and the corresponding gear shaft 461 is driven to rotate synchronously with the transmission of the pulley transmission group 5.

[0033] A first bracket 21 is fixedly installed at the bottom end of the air intake pump system 2, and 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, and the second bracket 221 is fixedly installed on the inner lower wall of the instrument outer frame 1.

[0034] Working principle: In the initial state, the winding tube 34 is evenly wound on the rotating tube 32 between the limit plates 33, reducing the volume of the entire air tightness tester and making it easy to carry. When in use, the first opening frame 13 is disassembled and opened, the connector 35 is taken out, and the driving motor 325 is controlled to control the driving longitudinal axis 323 and the second bevel gear 322 to drive the first bevel gear 321 and the rotating tube 32 to rotate in the opposite direction, thereby unwinding the winding tube 34 and connecting the connector 35 to the new energy vehicle parts to be tested for air tightness; Subsequently, the air intake pump system 2 is controlled to be turned on, and the external air is primarily filtered through the external filter element 4111, and then introduced into the corresponding filter slot 421 through the air inlet pipe 411, and then filtered twice through the corresponding filter inner core 432, and then introduced into the new energy vehicle parts to be tested for air tightness through the exhaust pipe 412, the connecting elbow 203, the air inlet pipe 201 and the air outlet pipe 202, the air pressure sensor 22, the air guide pipe 23, the connecting transverse pipe 341, the winding pipe 34 and the connector 35. After a certain gas pressure is introduced, the introduction is stopped, and the air tightness of the parts is detected by observing the value of the air pressure sensor 22, so that the incoming air can be filtered multiple times to prevent the external air from containing impurities from being introduced into the new energy vehicle parts and affecting the new energy vehicle parts. After the detection is completed, the driving motor 325 is controlled to start and control the driving longitudinal shaft 323, the second bevel gear 322 to drive the first bevel gear 321 and the rotating tube 32 to rotate, so as to reel in the winding tube 34. While driving the longitudinal shaft 323 to rotate, the corresponding gear shaft 461 is driven to rotate synchronously in cooperation with the transmission of the pulley transmission group 5. By controlling the rotation of the gear shaft 461, the inner and outer rings of the one-way bearing 4611 are self-locking. The gear shaft 461 rotates and drives the second gear 46 to control the first gear 45 and the rotating longitudinal shaft 44 to rotate slowly, thereby controlling the filter inner frame 42 to rotate slowly, and flexibly adjusting the positions of the filter slots 421 on both sides, so that the new filter core 432 rotates to the exhaust pipe 412 and the air inlet pipe 411 for subsequent filtering, and the old filter core 432 rotates to the position of the cover 413, and the second opening frame 14 and the cover 413 are disassembled in sequence, and the corresponding fixing screws 431 are correspondingly removed to remove the outer ring frame 43 and the old filter core 432 for cleaning or replacement.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that 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).

2. A portable air tightness detector according to claim 1, characterized in that: 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).

3. A portable air tightness detector according to claim 2, 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.

4. A portable air tightness detector according to claim 3, characterized in that: 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).

5. A portable air tightness detector according to claim 4, 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).

6. A portable air tightness detector according to claim 5, 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).

7. A portable air tightness detector according to claim 2, 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).

8. A portable air tightness detector according to claim 4, 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).

9. 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).

10. 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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