CN215296690U

CN215296690U - Building ventilation detection device

Info

Publication number: CN215296690U
Application number: CN202121438778.2U
Authority: CN
Inventors: 张元涛; 孙天恒; 郭奇龙; 谢丹丹
Original assignee: Shanghai Baohu Quality Inspection And Testing Co ltd
Current assignee: Shanghai Baohu Quality Inspection And Testing Co ltd
Priority date: 2021-06-26
Filing date: 2021-06-26
Publication date: 2021-12-24
Anticipated expiration: 2031-06-26

Abstract

The application discloses a building ventilation detection device, which belongs to the technical field of building ventilation detection and comprises a wall body, a ventilation detector and a hanging plate, wherein the ventilation detector is fixedly arranged on the hanging plate, a connecting groove is formed in the wall body, a connecting block is fixedly connected to the hanging plate, and the connecting block is in inserted fit with the connecting groove in the wall body; a first sliding groove is formed in the connecting block, and a limiting groove is formed in the inner wall of the connecting groove; a connecting assembly used for connecting a wall body is arranged in the connecting block, the connecting assembly comprises a connecting rod and a first spring, the connecting rod is connected to a first sliding groove of the connecting block in a sliding mode, and the connecting rod is inserted into a limiting groove in the wall body; one end of the first spring is fixedly connected to the bottom of the first sliding groove, and the other end of the first spring is fixedly connected to the connecting rod; and a moving assembly for driving the connecting rod to move is also arranged in the connecting block. This application is convenient for install and dismantle ventilation detector's effect.

Description

Building ventilation detection device

Technical Field

The application relates to a building ventilation detects technical field, especially relates to a building ventilation detection device.

Background

The civil air defense ventilation detection equipment mainly refers to a wind pressure curve testing device, an overpressure exhaust performance detection device, a rough filtration efficiency/dust holding capacity/resistance detection device, an air volume measurement calibration device, a fixed type air tightness detection device, a movable type air tightness detection device and the like which are involved in a temporary method for production, installation and management of civil air defense special equipment, and the ventilation detection equipment needs to be installed on the wall when the gas detection is carried out on a civil air defense basement.

The utility model discloses a correlation technique can refer to the grant bulletin number for CN212646560U Chinese utility model patent, and it discloses a building antichemical personnel's ventilation check out test set, including the link plate, link plate lower extreme fixed mounting base, base upper end fixed mounting support the board, support fixed mounting USB plug between board and the link plate, fixed mounting protective bar between base upper end and the link plate front surface, base lower extreme fixed mounting peripheral hardware power cord, support place the ventilation inspection appearance between board and the link plate, the link plate is kept away from ventilation inspection appearance one end is fixed to be seted up the screw mouth, and screw mouth department demountable installation screw.

With respect to the related art among the above, the inventors consider that the following drawbacks exist: the screw easily produces smooth silk, not hard up scheduling problem in long-term use, and need adopt the instrument of screwing up the screw in the installation to the degree of difficulty of ventilation detector of installation may increase.

SUMMERY OF THE UTILITY MODEL

In order to facilitate the installation ventilation detector, this application provides a building ventilation detection device.

The application provides a building ventilation detection device adopts following technical scheme:

a building ventilation detection device comprises a wall body, a ventilation detector and a hanging plate, wherein the ventilation detector is fixedly arranged on the hanging plate, a connecting groove is formed in the wall body, a connecting block is fixedly connected to the hanging plate, and the connecting block is in inserted fit with the connecting groove in the wall body; the connecting block is provided with a first sliding groove, and the inner wall of the connecting groove is provided with a limiting groove; a connecting assembly used for connecting a wall body is arranged in the connecting block, the connecting assembly comprises a connecting rod and a first spring, the connecting rod is connected to a first sliding groove of the connecting block in a sliding mode, and the connecting rod is inserted into a limiting groove in the wall body; one end of the first spring is fixedly connected to the bottom of the first sliding groove, and the other end of the first spring is fixedly connected to the connecting rod; and a moving assembly for driving the connecting rod to move is also arranged in the connecting block.

Through adopting above-mentioned technical scheme, for the ease of installing the ventilation detector, earlier remove through removal subassembly drive connecting rod, make the connecting rod remove to in the first spout, drive ventilation detector and connecting block removal through removing the link plate again after that, make the connecting block peg graft the spread groove on the wall body, then remove the effect of removal subassembly to the connecting rod, this moment under the elastic force effect of first spring, first spring promotes the spacing groove of connecting rod peg graft on the wall body, thereby be convenient for make the connecting block be fixed in the spread groove, and then reach the purpose of being convenient for install the ventilation detector.

Preferably, the connecting block is provided with a first cavity, and the first cavity is communicated with the first sliding groove; the moving assembly comprises a rotating rod, a first gear and a first rack, the rotating rod is rotatably connected to the inner wall of the first cavity, the first gear is fixedly connected to the rotating rod, the first rack is fixedly connected to the connecting rod, and the first rack is meshed with the first gear; and a driving mechanism for driving the rotating rod to rotate is arranged on the hanging plate.

Through adopting above-mentioned technical scheme, for the ease of drive connecting rod removes, rotate through actuating mechanism drive dwang earlier, the dwang rotates and drives first gear revolve, and first gear revolve the first rack of drive removes, and first rack removes and drives the connecting rod removal to reach the purpose of being convenient for remove the connecting rod.

Preferably, one end of the first rack, which is far away from the connecting rod, is fixedly connected with a first limiting plate.

Through adopting above-mentioned technical scheme, utilize first limiting plate can reduce the displacement range of rack in first cavity to reduce the possibility that the connecting rod breaks away from first spout.

Preferably, the driving mechanism comprises a pushing rod, a second gear and a second rack, a second chute for the pushing rod to slide is formed in the hanging plate, a yielding groove is formed in the side wall of the second chute, one end of the rotating rod penetrates through the connecting block and the hanging plate, and the rotating rod is rotatably connected to the side wall of the yielding groove; the second gear is fixedly connected to the rotating rod, the second rack is fixedly connected to the pushing rod, and the second gear is meshed with the second rack; the drive mechanism also includes a reset assembly for resetting the push rod.

Through adopting above-mentioned technical scheme, for the ease of drive dwang rotates, moves along vertical promotion catch bar earlier, and the catch bar removes and drives the second rack and remove, and second rack removes drive second gear revolve, and the second gear revolve rotates and drives the dwang and rotate to reach the drive dwang pivoted purpose of being convenient for.

Preferably, a third sliding chute is formed in the bottom wall of the second sliding chute, the reset assembly comprises a second limiting plate and a second spring, the second limiting plate is connected to the third sliding chute in a sliding mode, and the second limiting plate is fixedly connected to the bottom end of the push rod; one end of the second spring is fixedly connected to the bottom of the third sliding groove, and the other end of the second spring is fixedly connected to the bottom side of the second limiting plate.

By adopting the technical scheme, in the process of pushing the push rod to move, the push rod moves to drive the second limiting plate to move, and the second limiting plate moves to compress the second spring; when no longer applying external force to the catch bar, because under the elastic force effect of second spring, the second limiting plate removal is promoted to the second spring, and the second limiting plate removes and drives the catch bar removal to reach the purpose that makes the catch bar reset.

Preferably, the driving mechanism comprises a wire take-up roller and a pull rope, a second cavity is formed in the hanging plate, one end of the rotating rod penetrates through the connecting block and the hanging plate, the rotating rod is rotatably connected to the inner wall of the second cavity, and the wire take-up roller is fixedly connected to the rotating rod; the bottom side of the hanging plate is also provided with a connecting hole, the connecting hole is communicated with the second cavity, one end of the pull rope is fixedly connected to the peripheral surface of the wire take-up roller, part of the pull rope is wound on the wire take-up roller, and the other end of the pull rope penetrates through the connecting hole and extends to the outer side of the hanging plate; the driving mechanism further comprises a limiting assembly used for fixing the pull rope.

By adopting the technical scheme, when one end of the pull rope positioned on the outer side of the hanging plate is pulled to move, the pull rope can drive the wire take-up roller to rotate, and the wire take-up roller rotates to drive the rotating rod to rotate; when no longer pulling the stay cord and removing, because under the elastic force effect of first spring, first spring can drive the dwang and rotate, the dwang rotates the in-process for the stay cord is rich again and is located on receiving the line roller, thereby reaches and is convenient for drive the dwang pivoted purpose repeatedly.

Preferably, the limiting assembly comprises a fixed block, an abutting block and a third spring, the fixed block is fixedly connected to the pull rope, and the fixed block is connected to the inner wall of the connecting hole in a sliding mode; the fixed block is provided with a fourth sliding chute, one side of the fourth sliding chute, which is far away from the pull rope, is provided with a sliding hole, and the abutting block is connected to the inner wall of the sliding hole in a sliding manner; one end of the third spring is fixedly connected to the side wall of one side, close to the pull rope, of the fourth sliding groove, and the other end of the third spring is fixedly connected to the abutting block.

Through adopting above-mentioned technical scheme, when the pulling stay cord makes the connecting rod move to the first spout in, the stay cord still drives the fixed block simultaneously and removes to the connecting block outside, because under the elastic force effect of third spring, the third spring promotes the butt piece and removes this moment for the part of butt piece removes to the outside of fixed block, thereby makes the fixed block be difficult to remove to the connecting hole once more, and then reaches the purpose of being convenient for restrict the stay cord and remove.

Preferably, the abutting block is fixedly connected with a limiting frame, and the limiting frame is connected to the inner wall of the fourth sliding groove in a sliding mode.

Through adopting above-mentioned technical scheme, utilize spacing frame, be convenient for on the one hand lead the butt piece, on the other hand is convenient for reduce the possibility that the butt piece breaks away from the fixed block.

In summary, the present application includes at least one of the following beneficial technical effects:

1. in order to facilitate installation of the ventilation detector, the connecting rod is driven to move through the moving assembly, so that the connecting rod moves into the first sliding groove, then the ventilation detector and the connecting block are driven to move through the moving hanging plate, so that the connecting block is inserted into the connecting groove in the wall body, then the action of the moving assembly on the connecting rod is removed, at the moment, under the elastic force action of the first spring, the first spring pushes the connecting rod to be inserted into the limiting groove in the wall body, so that the connecting block is fixed in the connecting groove conveniently, and the aim of facilitating installation of the ventilation detector is fulfilled;

2. in order to facilitate the rotation of the driving rotating rod, the pushing rod is pushed to move along the vertical direction, the pushing rod drives the second rack to move, the second rack drives the second gear to rotate, and the second gear rotates to drive the rotating rod to rotate, so that the aim of facilitating the rotation of the driving rotating rod is fulfilled;

3. when one end of the pull rope, which is positioned on the outer side of the hanging plate, is pulled to move, the pull rope can drive the wire take-up roller to rotate, and the wire take-up roller rotates to drive the rotating rod to rotate; when no longer pulling the stay cord and removing, because under the elastic force effect of first spring, first spring can drive the dwang and rotate, the dwang rotates the in-process for the stay cord is rich again and is located on receiving the line roller, thereby reaches and is convenient for drive the dwang pivoted purpose repeatedly.

Drawings

FIG. 1 is a schematic overall structure diagram of a first embodiment of the present application;

FIG. 2 is a schematic view of a connection assembly according to an embodiment of the present disclosure;

FIG. 3 is a sectional view of a hanging plate in the embodiment of the present application;

FIG. 4 is a schematic diagram of the overall structure of the second embodiment of the present application;

FIG. 5 is a sectional view of the hanging plate in the embodiment of the present application;

fig. 6 is a schematic structural diagram of a salient limit component in the embodiment of the present application.

Description of reference numerals: 1. a wall body; 11. connecting grooves; 12. a limiting groove; 2. hanging the plate; 21. a ventilation detector; 22. a base; 221. a resisting plate; 222. a guard bar; 23. a second chute; 24. a yielding groove; 25. a third chute; 26. a second cavity; 27. connecting holes; 3. connecting blocks; 31. a first chute; 32. a first cavity; 4. a connecting assembly; 41. a connecting rod; 42. a first spring; 5. a moving assembly; 51. rotating the rod; 52. a first gear; 53. a first rack; 54. a first limit plate; 6. a drive mechanism; 61. a push rod; 62. a second gear; 63. a second rack; 64. a wire take-up roller; 65. pulling a rope; 66. a limiting frame; 67. a pull ring; 7. a reset assembly; 71. a second limiting plate; 72. a second spring; 8. a limiting component; 81. a fixed block; 811. a fourth chute; 812. a sliding hole; 82. a butting block; 83. and a third spring.

Detailed Description

The present application is described in further detail below with reference to figures 1-6.

The first embodiment is as follows: a building ventilation detection device is shown with reference to fig. 1 and 2 and comprises a wall body 1, a hanging plate 2 and a ventilation detector 21, wherein the ventilation detector 21 is fixedly installed on the hanging plate 2, a base 22 is fixedly connected to the bottom side of the hanging plate 2, and the bottom side of the ventilation detector 21 is abutted to the base 22. The top side of the base 22 is fixedly connected with a resisting plate 221, and the ventilation detector 21 is positioned between the resisting plate 221 and the hanging plate 2. Two protection rods 222 are fixedly connected to two sides of the abutting plate 221, and both the protection rods 222 are abutted to the ventilation detector 21.

As shown in fig. 2 and 3, a connecting groove 11 with a rectangular opening is formed in the wall 1, a connecting block 3 with a rectangular block structure is fixedly connected to one side of the hanging plate 2 away from the ventilation detector 21, and the connecting block 3 is inserted into the connecting groove 11 in the wall 1. First chutes 31 have been seted up on the two opposite side walls of the connecting block 3, and two limiting grooves 12 have been seted up on the inner wall of the connecting groove 11 corresponding to the two first chutes 31. Two sets of coupling assembling 4 that are used for connecting wall body 1 are provided with in the connecting block 3, and two sets of coupling assembling 4 correspond two first spouts 31 settings respectively. Each set of connecting components 4 comprises a connecting rod 41 and a first spring 42, the connecting rod 41 is slidably connected to the first sliding groove 31 on the connecting block 3, and the connecting rod 41 is inserted into the limiting groove 12 on the wall 1. The first spring 42 is located in the first sliding slot 31, one end of the first spring 42 is fixedly connected to the bottom of the first sliding slot 31, and the other end of the first spring 42 is fixedly connected to the connecting rod 41.

As shown in fig. 2 and 3, a first cavity 32 is formed in the connecting block 3, the two first sliding grooves 31 are both communicated with the first cavity 32, a moving assembly 5 for driving the connecting rod 41 to move is arranged in the connecting block 3, the moving assembly 5 includes a rotating rod 51, a first gear 52, a first rack 53 and a first limiting plate 54, the rotating rod 51 is rotatably connected to the inner wall of the first cavity 32, the first gear 52 is located in the first cavity 32, and the first gear 52 is fixedly connected to the rotating rod 51. The number of the first racks 53 is two, the two first racks 53 are respectively and fixedly connected to the two connecting rods 41, the two first racks 53 can slide into the first cavity 32, and the two first racks 53 are engaged with the first gear 52. The number of the first limiting plates 54 is two, the two first limiting plates 54 are respectively arranged corresponding to the two first racks 53, and the first limiting plates 54 are fixedly connected to one ends of the first racks 53 far away from the connecting rod 41; the hanging plate 2 is provided with a driving mechanism 6 for driving the rotating rod 51 to rotate.

In the process of installing the ventilation detector 21, the driving mechanism 6 drives the rotating rod 51 to rotate, the rotating rod 51 rotates to drive the first gear 52 to rotate, the first gear 52 rotates to drive the two first racks 53 to move, and the two first racks 53 drive the two connecting rods 41 to move; when two connecting rods 41 move to first spout 31 in, remove link plate 2 earlier and drive ventilation detector 21 and connecting block 3 and remove, make connecting block 3 peg graft in spread groove 11, remove actuating mechanism 6 to dwang 51's effect after that, this moment under the elastic force effect of two first springs 42, two first springs 42 promote two connecting rods 41 respectively and remove, make two connecting rods 41 peg graft respectively in two spacing grooves 12, thereby reach the purpose of fixed link plate 2, and then reach the purpose of being convenient for install ventilation detector 21. In the process of detaching the ventilation detector 21 from the ventilation detector, the rotation rod 51 is driven to rotate only by the driving mechanism 6, the rotation rod 51 drives the two connecting rods 41 to move into the two first sliding grooves 31 respectively in a rotating manner, and then the connecting rods are separated from the connecting grooves 11 by the moving connecting blocks 3, so that the purpose of detaching the ventilation detector 21 can be achieved.

As shown in fig. 2 and fig. 3, the driving mechanism 6 includes a pushing rod 61, a second gear 62, a second rack 63 and a reset component 7, a second sliding groove 23 for the pushing rod 61 to slide is disposed on the hanging plate 2, and an abdicating groove 24 is disposed on a side wall of the second sliding groove 23 close to one side of the rotating rod 51. The dwang 51 rotates to be connected in the inner wall of groove 24 of stepping down, and the one end through connection piece 3 and the setting of link plate 2 of dwang 51, and dwang 51 rotates to be connected in the lateral wall of groove 24 of stepping down. The second gear 62 is fixedly connected to the rotating rod 51, and the second gear 62 is located in the avoiding groove 24. The second rack 63 is fixedly connected to the pushing rod 61, and the second gear 62 is engaged with the second rack 63.

As shown in fig. 2 and 3, the reset assembly 7 includes a second limit plate 71 and a second spring 72, a third sliding groove 25 for the second limit plate 71 to slide is formed on the bottom wall of the second sliding groove 23, the second limit plate 71 is fixedly connected to the bottom side of the push rod 61, one end of the second spring 72 is fixedly connected to the bottom of the third sliding groove 25, and the other end of the second spring 72 is fixedly connected to the bottom side of the limit plate.

In order to facilitate the rotation of the driving rotating rod 51, the pushing rod 61 is pushed to move vertically, the pushing rod 61 moves to drive the second rack 63 to move, the second rack 63 moves to drive the second gear 62 to rotate, and the second gear 62 rotates to drive the rotating rod 51 to rotate, so that the purpose of facilitating the rotation of the driving rotating rod 51 is achieved.

Example two: a building ventilation detection device is shown in figures 5 and 6, and the main difference from the first embodiment is that: actuating mechanism 6 has seted up second cavity 26 including receiving line roller 64, stay cord 65 and spacing subassembly 8 on the link plate 2, and dwang 51 one end through connection piece 3 and link plate 2 set up, and dwang 51 rotates the inner wall of connecting in second cavity 26. The take-up roller 64 is located in the second cavity 26, and the take-up roller 64 is fixedly connected to the rotating rod 51. The bottom side of the hanging plate 2 is also provided with a connecting hole 27, and the connecting hole 27 is communicated with the second cavity 26. One end of the pulling rope 65 is fixedly connected to the wire winding roller 64, part of the pulling rope 65 winds the wire winding roller 64, the other end of the pulling rope 65 penetrates through the connecting hole 27 and extends to the outer side of the hanging plate 2, and one end of the pulling rope 65, which is located on the outer side of the hanging plate 2, is fixedly connected with a pulling ring 67.

As shown in fig. 5 and 6, the limiting assembly 8 includes a fixing block 81, an abutting block 82, a third spring 83 and a limiting frame 66, the fixing block 81 is sleeved on the pulling rope 65, and the fixing block 81 is fixedly connected with the pulling rope 65. The fixing block 81 is connected to the inner wall of the connecting hole 27 in a vertical sliding manner, two fourth sliding grooves 811 are formed in the fixing block 81, and the two fourth sliding grooves 811 are symmetrically arranged about the axial line of the pull rope 65. The inner walls of the two fourth sliding grooves 811 on the side away from the axis of the pull rope 65 are provided with sliding holes 812. The number of the abutting blocks 82 is two, and the two abutting blocks 82 are respectively connected to the inner walls of the two sliding holes 812 in a sliding manner. The two third springs 83 are respectively located in the two fourth sliding grooves 811, one end of each third spring 83 is fixedly connected to the side wall of the fourth sliding groove 811 near the pull rope 65, and the other end of each third spring 83 is fixedly connected to the abutting block 82 near the pull rope 65. The number of the limiting frames 66 is two, the two limiting frames 66 are respectively arranged corresponding to the two abutting blocks 82, and the two limiting frames 66 are respectively connected with the inner walls of the two fourth sliding grooves 811 through the sliding connection blocks 3.

In order to drive the rotating rod 51 to rotate, the pull ring 67 is pulled vertically, the pull ring 67 moves to drive the pull rope 65 to move, the pull rope 65 can drive the wire take-up roller 64 to rotate, and the wire take-up roller 64 rotates to drive the rotating rod 51 to rotate; when the pulling rope 65 is not pulled to move any more, the first spring 42 can drive the rotating rod 51 to rotate under the action of the elastic force of the first spring 42, and the pulling rope 65 is wound on the wire winding roller 64 again in the rotating process of the rotating rod 51, so that the aim of conveniently and repeatedly driving the rotating rod 51 to rotate is fulfilled.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a building ventilation detection device, includes wall body (1), ventilation detection appearance (21) and link plate (2), ventilation detection appearance (21) fixed mounting is on link plate (2), its characterized in that: the wall body (1) is provided with a connecting groove (11), the hanging plate (2) is fixedly connected with a connecting block (3), and the connecting block (3) is in inserting fit with the connecting groove (11) in the wall body (1); a first sliding groove (31) is formed in the connecting block (3), and a limiting groove (12) is formed in the inner wall of the connecting groove (11); a connecting assembly (4) used for connecting a wall body (1) is arranged in the connecting block (3), the connecting assembly (4) comprises a connecting rod (41) and a first spring (42), the connecting rod (41) is connected to a first sliding groove (31) of the connecting block (3) in a sliding mode, and the connecting rod (41) is inserted into a limiting groove (12) in the wall body (1); one end of the first spring (42) is fixedly connected to the bottom of the first sliding groove (31), and the other end of the first spring (42) is fixedly connected to the connecting rod (41); and a moving assembly (5) for driving the connecting rod (41) to move is further arranged in the connecting block (3).

2. A building ventilation detection device according to claim 1, wherein: the connecting block (3) is provided with a first cavity (32), and the first cavity (32) is communicated with the first sliding groove (31); the moving assembly (5) comprises a rotating rod (51), a first gear (52) and a first rack (53), the rotating rod (51) is rotatably connected to the inner wall of the first cavity (32), the first gear (52) is fixedly connected to the rotating rod (51), the first rack (53) is fixedly connected to the connecting rod (41), and the first rack (53) is meshed with the first gear (52); and a driving mechanism (6) for driving the rotating rod (51) to rotate is arranged on the hanging plate (2).

3. A building ventilation detection device according to claim 2, wherein: one end, far away from the connecting rod (41), of the first rack (53) is fixedly connected with a first limiting plate (54).

4. A building ventilation detection device according to claim 2, wherein: the driving mechanism (6) comprises a pushing rod (61), a second gear (62) and a second rack (63), a second sliding groove (23) for the pushing rod (61) to slide is formed in the hanging plate (2), a yielding groove (24) is formed in the side wall of the second sliding groove (23), one end of the rotating rod (51) penetrates through the connecting block (3) and the hanging plate (2) to be arranged, and the rotating rod (51) is rotatably connected to the side wall of the yielding groove (24); the second gear (62) is fixedly connected to the rotating rod (51), the second rack (63) is fixedly connected to the pushing rod (61), and the second gear (62) is meshed with the second rack (63); the drive mechanism (6) further comprises a reset assembly (7) for resetting the push rod (61).

5. A building ventilation detection device according to claim 4, wherein: a third sliding chute (25) is formed in the bottom wall of the second sliding chute (23), the resetting component (7) comprises a second limiting plate (71) and a second spring (72), the second limiting plate (71) is connected to the third sliding chute (25) in a sliding mode, and the second limiting plate (71) is fixedly connected to the bottom end of the push rod (61); one end of the second spring (72) is fixedly connected to the bottom of the third sliding groove (25), and the other end of the second spring (72) is fixedly connected to the bottom side of the second limiting plate (71).

6. A building ventilation detection device according to claim 2, wherein: the driving mechanism (6) comprises a wire winding roller (64) and a pull rope (65), a second cavity (26) is formed in the hanging plate (2), one end of the rotating rod (51) penetrates through the connecting block (3) and the hanging plate (2), the rotating rod (51) is rotatably connected to the inner wall of the second cavity (26), and the wire winding roller (64) is fixedly connected to the rotating rod (51); a connecting hole (27) is further formed in the bottom side of the hanging plate (2), the connecting hole (27) is communicated with the second cavity (26), one end of the pull rope (65) is fixedly connected to the outer peripheral surface of the wire take-up roller (64), part of the pull rope (65) is wound on the wire take-up roller (64), and the other end of the pull rope (65) penetrates through the connecting hole (27) and extends to the outer side of the hanging plate (2); the driving mechanism (6) further comprises a limiting assembly (8) used for fixing the pull rope (65).

7. A building ventilation detection device according to claim 6, wherein: the limiting assembly (8) comprises a fixing block (81), an abutting block (82) and a third spring (83), the fixing block (81) is fixedly connected to the pull rope (65), and the fixing block (81) is connected to the inner wall of the connecting hole (27) in a sliding mode; a fourth sliding groove (811) is formed in the fixed block (81), a sliding hole (812) is formed in one side, far away from the pull rope (65), of the fourth sliding groove (811), and the abutting block (82) is connected to the inner wall of the sliding hole (812) in a sliding mode; one end of the third spring (83) is fixedly connected to the side wall of the fourth sliding groove (811) close to one side of the pull rope (65), and the other end of the third spring (83) is fixedly connected to the abutting block (82).

8. A building ventilation detection device according to claim 7, wherein: the abutting block (82) is fixedly connected with a limiting frame (66), and the limiting frame (66) is connected to the inner wall of the fourth sliding groove (811) in a sliding mode.