Alarm device for dust concentration detection

Abstract

The dust concentration detection alarm device comprises a dust concentration detection alarm device body, the dust concentration detection alarm device body comprises an installation box with an opening in the right side, a box cover is fixed to the right side of the installation box in a magnetic attraction mode, a detection alarm mechanism is installed in the installation box, and the installation box is matched with the box cover. The installation box is used for shielding and protecting the detection alarm mechanism, a detection head matched with the detection alarm mechanism is fixedly embedded in the bottom of the installation box, an electric sliding rail is arranged above the installation box, and an installation base with the bottom open is fixedly installed at the sliding end of the electric sliding rail. Through the arrangement of a series of structures, the detection head can be shielded and protected when the detection head is not used, the phenomenon that follow-up use is affected by a large amount of dust when the detection head is not used is reduced, the height of the installation box can be reduced when detection parts are maintained, personnel do not need to climb to operate, and potential safety hazards can be effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of dust concentration detection, in particular to an alarm device for dust concentration detection. Background Art

[0002] Dust refers to solid particles suspended in the air. Modern manufacturing industry has developed rapidly, and most of the production has been mechanically automated. However, because the production machines are linear, they cannot be completely sealed. Therefore, for example, in flour and mineral production workshops, dust is often filled with dust, which is very likely to cause dangerous dust explosions. Therefore, dust concentration detection devices are needed for real-time monitoring to ensure safe production. Because the production workshop has a large space, it is usually necessary to set up dust concentration detection alarm devices in multiple places. During daily maintenance, the workload is large, and these devices are generally hung high. There are certain safety hazards in repeated climbing. For this reason, the application number: 202122146833.7 discloses a dust concentration detection alarm. The alarm device comprises a mounting rail, which is fixed on a wall or a supporting frame of a production workshop, and also comprises a box body, wherein rotating rollers are provided on both sides of the box body, and slots are provided on both sides of the mounting rails, and the rollers on both sides of the box body cooperate with the slots, and a driving member is fixed in the box body, wherein one of the rollers is cooperated with and connected to an extension member, and the driving member and the extension member are connected through a transmission member, and a detection head is fixed on the side of the outside of the box body away from the mounting rails; its beneficial effect is that the rollers are driven to rotate by the driving member, so that the box body as a whole moves on the mounting rails, thereby realizing the position change of the detection head on the box body, and only one detection device is needed to monitor the dust concentration in various places within a large range of the production workshop, thereby reducing the number of installations of the conventional method and being more convenient in daily maintenance;

[0003] The dust concentration detection alarm device disclosed in the above patent adjusts the position of the detection head by moving the position of the entire box, thereby eliminating the need to install multiple devices and facilitating maintenance for personnel. However, it still has some shortcomings during use: 1. Due to the high installation height of the entire device, personnel are still required to climb up to operate during maintenance, which still poses certain safety hazards; 2. The detection head is set on the outside and lacks a protective structure. After use, a large amount of dust covers the outside of the detection head, affecting subsequent use. In view of the above, we have proposed an alarm device for dust concentration detection. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings of the prior art and to propose an alarm device for detecting dust concentration.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] The dust collecting device is provided with a dust collecting device and a dust collecting device is provided with a dust collecting device, wherein the dust collecting device is provided with a dust collecting device and a dust collecting device is provided with a dust collecting device. The telescopic rod is used to drive the protective mechanism to move laterally. The bottom of the mounting seat is provided with three mounting slots, and the same winding vertical adjustment mechanism is installed in the three mounting slots. The bottom of the winding vertical adjustment mechanism is fixedly connected to the top of the mounting box. The winding vertical adjustment mechanism is used to adjust the height position of the mounting box. The right side of the mounting seat is fixedly connected with an output shaft and a brake motor fixedly connected to the winding vertical adjustment mechanism. The brake motor is used to vertically drive the winding vertical adjustment mechanism. A touch switch is embedded and fixed on the bottom of the mounting seat, and the bottom of the touch switch is in movably contact with the mounting box. The top of the mounting seat is fixedly connected with a controller. The front and rear sides of the mounting box are fixedly installed with the same card-mounting fixing mechanism, and the card-mounting fixing mechanism is used to limit the card-mounting of the mounting box. The card-mounting fixing mechanism is sleeved on the mounting seat. The top of the mounting seat is fixedly connected with a first electric telescopic rod fixedly connected with the output shaft and the card-mounting fixing mechanism. The first electric telescopic rod is used to drive the card-mounting fixing mechanism to move laterally, and the first electric telescopic rod, the touch switch and the brake motor are all electrically connected to the controller.

[0007] Preferably, the detection alarm mechanism includes an information processing module fixedly connected to the inner wall of the bottom of the installation box, the information processing module is electrically connected to the detection head, a control module is fixedly connected to the top inner wall of the installation box, an alarm speaker is fixedly connected to the left inner wall of the installation box, the left side of the alarm speaker is the sound output end, and a plurality of sound holes that cooperate with the sound output end of the alarm speaker are opened on the left inner wall of the installation box. The information processing module and the alarm speaker are both electrically connected to the control module. The information processing module, the alarm speaker, the control module and the detection head cooperate to detect the dust concentration. The principle is existing technology and will not be elaborated here.

[0008] Preferably, the protective mechanism includes a U-shaped protective plate mounted on the detection head, a baffle is fixedly connected to the bottom of the installation box, the left side of the baffle is in movable contact with the right side of the U-shaped protective plate, the U-shaped protective plate and the baffle cooperate to shield and protect the detection head, the left side of the U-shaped protective plate is fixedly connected to a connecting plate, the top of the connecting plate is fixedly connected to the output shaft end of the multi-stage electric telescopic rod, and the right side of the connecting plate is in movable contact with the left side of the installation box.

[0009] Preferably, the vertical winding adjustment mechanism includes a rotating shaft rotatably installed in three mounting grooves, and three winding rollers are fixedly sleeved on the rotating shaft. The three winding rollers are respectively located in corresponding mounting grooves, and a winding line is wound and fixed on the winding roller. The bottom end of the winding line is fixedly connected to the top of the mounting box, and the left end of the output shaft of the brake motor is fixedly connected to the right end of the rotating shaft. The brake motor is used to drive the rotating shaft to rotate, thereby driving the winding roller to rotate to reel or release the winding line. A guide sleeve is fixedly connected between the front inner wall and the rear inner wall of the mounting groove, and the guide sleeve is movably sleeved on the corresponding winding line. The guide sleeve has a vertical guiding effect on the corresponding winding line.

[0010] Preferably, the card-mounted fixing mechanism includes two card sleeves, which are respectively fixedly connected to the front and rear sides of the installation box. A card block is movably installed in the card sleeve. The card sleeve and the card block cooperate to limit the vertical position of the installation box. A U-shaped rod is provided on the mounting seat. The left front and left rear of the U-shaped rod are respectively fixedly connected to the right side of the corresponding card block. The output shaft end of the first electric telescopic rod is fixedly connected to the right top of the U-shaped rod. The first electric telescopic rod is used to drive the U-shaped rod to move horizontally.

[0011] Preferably, the front side of the brake motor, the front side of the multi-stage electric telescopic rod and the front side of the first electric telescopic rod are all fixedly connected to a wireless remote control switch, and the three wireless remote control switches are matched with the same external remote control. The wireless remote control and the wireless remote control switch cooperate to remotely control the brake motor, the multi-stage electric telescopic rod and the first electric telescopic rod. The wireless remote control switch located on the multi-stage electric telescopic rod is electrically connected to the multi-stage electric telescopic rod, and the other two wireless remote control switches are electrically connected to the controller.

[0012] Preferably, two grooves are provided on the right top and the right bottom of the installation box, a first magnet is fixedly connected to the left inner wall of the groove, and a second magnet is fixedly connected to the left top and the left bottom of the box cover, the second magnet is movably sleeved in the corresponding groove and adsorbed with the first magnet, and the box cover can be quickly fixed by the first magnet and the second magnet, and a T-shaped handle is fixedly connected to the right side of the box cover.

[0013] Compared with the existing technology, the beneficial effects of the utility model are:

[0014] 1. The multi-stage electric telescopic rod and the protective mechanism can shield the detection head when not in use, reducing the phenomenon of large amounts of dust covering and affecting subsequent use;

[0015] 2. The winding vertical adjustment mechanism, brake motor, touch switch, controller and clamping fixing mechanism are coordinated to release the fixing of the installation box and adjust its height during inspection and maintenance. Therefore, when maintaining the detection components, there is no need for personnel to climb up to operate, which can effectively reduce safety hazards.

[0016] The utility model uses a series of structural settings to shield and protect the detection head when not in use, reducing the phenomenon of a large amount of dust covering the subsequent use when not in use. It can also lower the height of the installation box when the detection components are maintained, eliminating the need for personnel to climb up to operate, and effectively reducing safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of an alarm device for detecting dust concentration proposed by the utility model;

[0018] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure;

[0019] Figure 3 for Figure 2 Schematic diagram of the enlarged structure of part A.

[0020] In the figure: 100, electric slide rail; 101, installation box; 102, information processing module; 103, detection head; 104, alarm horn; 105, control module; 1, mounting base; 2, multi-stage electric telescopic rod; 3, connecting plate; 4, U-shaped protective plate; 5, baffle; 6, mounting slot; 7, rotating shaft; 8, winding roller; 9, winding line; 10, brake motor; 11, touch switch; 12, controller; 13, U-shaped rod; 14, first electric telescopic rod; 15, clamping sleeve; 16, clamping block. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0022] Reference Figure 1-3, an alarm device for detecting dust concentration includes a dust concentration detection alarm device body, the dust concentration detection alarm device body includes an installation box 101 with an opening on the right side, and a box cover is fixed to the right side of the installation box 101 by magnetic attraction, wherein the right top and right bottom of the installation box 101 are provided with two grooves, and a first magnet is fixedly connected to the left inner wall of the groove, and the left top and left bottom of the box cover are fixedly connected. The second magnet is movably sleeved in the corresponding groove and adsorbed with the first magnet, and the box cover can be quickly fixed by the first magnet and the second magnet. A T-shaped handle is fixedly connected to the right side of the box cover, and the box cover can be moved by pulling the T-shaped handle. A detection alarm mechanism is installed in the installation box 101, and a detection head 103 that cooperates with the detection alarm mechanism is embedded and fixed at the bottom of the installation box 101. The detection head 103 cooperates with the detection alarm mechanism. The dust concentration is detected, and its specific detection principle is the existing technology, which will not be elaborated here. The detection alarm mechanism includes an information processing module 102 fixedly connected to the inner wall of the bottom of the installation box 101, and the information processing module 102 is electrically connected to the detection head 103. A control module 105 is fixedly connected to the top inner wall of the installation box 101, and an alarm speaker 104 is fixedly connected to the left inner wall of the installation box 101. The left side of the alarm speaker 104 is a sound output end, and a plurality of sound output holes that cooperate with the sound output end of the alarm speaker 104 are provided on the left inner wall of the installation box 101. The information processing module 102 and the alarm speaker 104 are both electrically connected to the control module 105. The information processing module 102, the alarm speaker 104, the control module 105 and the detection head 103 cooperate. The principle of detecting the dust concentration is the existing technology, which will not be elaborated here.

[0023] An electric slide 100 is provided above the installation box 101. The sliding end of the electric slide 100 is fixedly installed with a mounting seat 1 with an opening at the bottom. The electric slide 100 cooperates with the sliding end to drive the mounting seat 1 to move horizontally. The bottom of the mounting seat 1 is in active contact with the top of the installation box 101. A protective mechanism is provided on the detection head 103. The top left side of the mounting seat 1 is fixedly connected to a multi-stage electric telescopic rod 2. The protruding end of the multi-stage electric telescopic rod 2 is fixedly connected to the protective mechanism. The protective mechanism includes a U-shaped protective plate 4 set on the detection head 103. The bottom of the packaging box 101 is fixedly connected to a baffle 5, and the left side of the baffle 5 is in active contact with the right side of the U-shaped protective plate 4. The U-shaped protective plate 4 and the baffle 5 cooperate to shield and protect the detection head 103. The left side of the U-shaped protective plate 4 is fixedly connected to a connecting plate 3, and the top of the connecting plate 3 is fixedly connected to a connecting block. The right side of the connecting block is fixedly connected to the left end of the output shaft of the multi-stage electric telescopic rod 2. The connecting block is used to realize the connection between the connecting plate 3 and the output shaft of the multi-stage electric telescopic rod 2. The right side of the connecting plate 3 is in active contact with the left side of the installation box 101;

[0024] The bottom of the mounting seat 1 is provided with three mounting grooves 6, and the same winding vertical adjustment mechanism is installed in the three mounting grooves 6. The bottom of the winding vertical adjustment mechanism is fixedly connected to the top of the mounting box 101, and the right side of the mounting seat 1 is fixedly connected to the brake motor 10 whose output shaft is fixedly connected to the winding vertical adjustment mechanism. The winding vertical adjustment mechanism includes a rotating shaft 7 rotatably installed in the three mounting grooves 6, wherein a through hole is provided between the inner walls of the side of two adjacent mounting grooves 6 that are close to each other, and two first bearings are fixedly provided in the fixed sleeves in the through hole, and a rotating groove is provided on the inner walls of the side of the two mounting grooves 6 that are away from each other, and a second bearing is fixedly provided in the rotating groove. The inner side of the inner ring of the first bearing and the inner side of the inner ring of the second bearing are fixedly connected to the outer side of the rotating shaft 7. The bearing and the second bearing play the role of providing a rotatable installation for the rotating shaft 7. A fixed sleeve on the rotating shaft 7 is provided with three winding rollers 8. The three winding rollers 8 are respectively located in the corresponding mounting grooves 6. A winding wire 9 is wound and fixed on the winding roller 8. The bottom end of the winding wire 9 is fixedly connected to the top of the mounting box 101. The left end of the output shaft of the brake motor 10 is fixedly connected to the right end of the rotating shaft 7. The brake motor 10 is used to drive the rotating shaft 7 to rotate, thereby driving the winding roller 8 to rotate to reel or release the winding wire 9. A guide sleeve is fixedly connected between the front inner wall and the rear inner wall of the mounting groove 6. Two balls are embedded on the four side inner walls of the guide sleeve. The winding wire 9 is located between the corresponding eight balls and is in active contact with the balls. The guide sleeve and the balls cooperate to vertically guide the corresponding winding wire 9.

[0025] A touch switch 11 is embedded and fixed at the bottom of the mounting base 1, wherein the top of the mounting box 101 is provided with an extrusion groove with openings on the front and rear sides. The bottom inner wall of the extrusion groove is in active contact with the bottom of the touch switch 11. The extrusion groove is used to squeeze the touch switch 11 to trigger the touch switch 11 to turn on. The top of the mounting base 1 is fixedly connected to the controller 12. The front and rear sides of the mounting box 101 are fixedly installed with the same card-mounted fixing mechanism, which is sleeved on the mounting base 1. The top of the mounting base 1 is fixedly connected to a first electric telescopic rod 14 with an output shaft fixedly connected to the card-mounted fixing mechanism. The card-mounted fixing mechanism includes two card sleeves. 15, the two clamping sleeves 15 are respectively fixedly connected to the front and rear sides of the installation box 101, and the movable card in the clamping sleeve 15 is equipped with a clamping block 16. The clamping sleeve 15 and the clamping block 16 cooperate to limit the vertical position of the installation box 101. A U-shaped rod 13 is sleeved on the mounting base 1, wherein the front inner wall and the rear inner wall of the U-shaped rod 13 are respectively in movable contact with the front and rear sides of the mounting base 1, and the left front and left rear of the U-shaped rod 13 are respectively fixedly connected to the right side of the corresponding clamping block 16. The output shaft end of the first electric telescopic rod 14 is fixedly connected to the right top of the U-shaped rod 13, and the first electric telescopic rod 14 is used to drive the U-shaped rod 13 to move horizontally;

[0026] The first electric telescopic rod 14, the touch switch 11 and the brake motor 10 are all electrically connected to the controller 12. The front side of the brake motor 10, the front side of the multi-stage electric telescopic rod 2 and the front side of the first electric telescopic rod 14 are all fixedly connected with a wireless remote control switch. The three wireless remote control switches are matched with the same external remote control. The wireless remote control and the wireless remote control switch cooperate to remotely control the brake motor 10, the multi-stage electric telescopic rod 2 and the first electric telescopic rod 14. The wireless remote control switch located on the multi-stage electric telescopic rod 2 is electrically connected to the multi-stage electric telescopic rod 2, and the other two wireless remote control switches are electrically connected to the controller 12. The utility model can shield and protect the detection head 103 when not in use through a series of structural settings, thereby reducing the phenomenon that a large amount of dust coverage affects subsequent use when not in use, and can lower the height of the installation box 101 when the detection components are maintained, without the need for personnel to climb up to operate, which can effectively reduce safety hazards.

[0027] Working principle: When not in use, the U-shaped protective plate 4 and the baffle 5 cooperate to shield and protect the detection head 103, which can effectively reduce the phenomenon that a large amount of dust covers the detection head 103 and affects subsequent use. When the detection head 103 is unblocked, the corresponding wireless remote control switch is controlled by the external remote control to control the multi-stage electric telescopic rod 2 to open in the forward direction. The output shaft of the multi-stage electric telescopic rod 2 drives the U-shaped protective plate 4 to move to the left through the connecting plate 3. The U-shaped protective plate 4 moves to the left and the shielding of the detection head 103 is lifted at the same time. The dust concentration can be detected by cooperating with the detection head 103 and the detection alarm mechanism, and when the dust concentration is detected to be high, the alarm speaker 104 is used to alert personnel. The specific dust concentration detection principle has been mentioned in the patent application number: 202122146833.7, which will not be elaborated here.

[0028] During the dust concentration detection process, the mounting base 1 can be driven to move laterally by the sliding end of the electric slide rail 100, and the mounting base 1 drives the mounting box 101 to move laterally through the rotating shaft 7, the winding roller 8 and the winding line 9 in turn, and the mounting box 101 drives the detection components inside it to move laterally. When the required position is adjusted according to the detection needs, the electric slide rail 100 is stopped. The mounting box 101 and the detection components inside it can be moved laterally, so that dust detection can be carried out at different positions without the need to set up multiple detection devices;

[0029] After the inspection, when the inspection components need to be inspected and repaired, the overall height of the installation box 101 can be lowered. At this time, the inspection head 103 is in an unobstructed state, and the U-shaped protective plate 4 will not block the bottom of the installation box 101. When adjusting the height position of the installation box 101, the first electric telescopic rod 14 is first started in reverse. The output shaft of the first electric telescopic rod 14 drives the U-shaped rod 13 to move to the right, and the U-shaped rod 13 drives the two clamping blocks 16 to separate from the corresponding clamping sleeves 15 respectively, releasing the fixation of the installation box 101. Then, the brake motor 10 is turned on in the positive direction, and the output shaft of the brake motor 10 drives the rotating shaft 7 to rotate, and the rotating shaft 7 drives the three winding rollers 8 to rotate. While the three winding rollers 8 rotate, the corresponding winding wires 9 are released respectively. At this time, under the action of gravity, the installation box 101 moves downward, and the installation box 101 drives the inspection components inside it to move downward. When it moves downward to a height position that can be reached, the T-shaped handle can be pulled to the right to drive the box cover to move to the right, and the installation box 10 1 for maintenance of the components inside. After the maintenance, the box cover can be magnetically fixed to the right side of the installation box 101 again, and then the brake motor 10 is started in the reverse direction. Similarly, the movement process of starting the brake motor 10 in the forward direction is opposite to that of the forward direction, so that the winding roller 8 is converted to winding the corresponding winding wire 9, so that the installation box 101 moves upward, and the installation box 101 drives the extrusion groove to move upward to squeeze and contact the touch switch 11. At this time, the top of the installation box 101 is in active contact with the bottom of the installation base 1. At this time, the touch switch 11 is triggered to turn on, and the touch switch 11 transmits a signal to the controller 12. The controller 12 controls the brake motor 10 to turn off and controls the first electric telescopic rod 14 to open in the forward direction, so that the U-shaped rod 13 is converted to move to the left. The U-shaped rod 13 drives the two clamping blocks 16 to be respectively clamped in the corresponding clamping sleeves 15, thereby realizing effective restriction and fixation of the installation box 101. By adjusting the height position of the installation box 101, when maintaining the detection components, there is no need for personnel to climb up to operate, which can effectively reduce safety hazards.

[0030] After the installation box 101 is raised, when it is necessary to shield and protect the detection head 103, the multi-stage electric telescopic rod 2 is started in the reverse direction. The output shaft of the multi-stage electric telescopic rod 2 drives the U-shaped protective plate 4 to move rightward through the connecting plate 3 to shield the detection head 103. When the U-shaped protective plate 4 moves rightward until it contacts the left side of the baffle 5, the multi-stage electric telescopic rod 2 is stopped. At this time, the U-shaped protective plate 4 and the baffle 5 cooperate to shield and protect the detection head 103, which can effectively reduce the phenomenon that a large amount of dust covers the detection head 103 when not in use and affects subsequent use.

[0031] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A dust concentration detection alarm device, comprising a dust concentration detection alarm device body, wherein the dust concentration detection alarm device body comprises an installation box (101) with an opening on the right side, and a box cover is fixed to the right side of the installation box (101) by magnetic attraction, characterized in that: The installation box (101) is provided with a detection alarm mechanism, and a detection head (103) matched with the detection alarm mechanism is embedded and fixed at the bottom of the installation box (101). An electric slide rail (100) is provided above the installation box (101), and a mounting seat (1) with an opening at the bottom is fixedly installed at the sliding end of the electric slide rail (100). The bottom of the mounting seat (1) is in active contact with the top of the installation box (101). A protective mechanism is sleeved on the detection head (103). A multi-stage electric telescopic rod (2) is fixedly connected to the left side of the top of the mounting seat (1), and the protruding end of the multi-stage electric telescopic rod (2) is fixedly connected to the protective mechanism. Three installation slots (6) are provided at the bottom of the mounting seat (1), and the same winding vertical adjustment mechanism is installed in the three installation slots (6). The winding vertical adjustment mechanism The bottom of the mounting box (101) is fixedly connected to the top of the mounting box (101); the right side of the mounting seat (1) is fixedly connected to a brake motor (10) whose output shaft is fixedly connected to a winding vertical adjustment mechanism; the bottom of the mounting seat (1) is embedded and fixed with a touch switch (11); the bottom of the touch switch (11) is in movable contact with the mounting box (101); the top of the mounting seat (1) is fixedly connected to a controller (12); the front and rear sides of the mounting box (101) are fixedly installed with the same card-mounted fixing mechanism, the card-mounted fixing mechanism is sleeved on the mounting seat (1); the top of the mounting seat (1) is fixedly connected to a first electric telescopic rod (14) whose output shaft is fixedly connected to the card-mounted fixing mechanism; the first electric telescopic rod (14), the touch switch (11) and the brake motor (10) are all electrically connected to the controller (12).

2. The dust concentration detection alarm device according to claim 1, characterized in that: The detection alarm mechanism comprises an information processing module (102) fixedly connected to the bottom inner wall of the installation box (101), the information processing module (102) being electrically connected to the detection head (103), a control module (105) being fixedly connected to the top inner wall of the installation box (101), an alarm speaker (104) being fixedly connected to the left inner wall of the installation box (101), the left side of the alarm speaker (104) being a sound output end, a plurality of sound output holes cooperating with the sound output end of the alarm speaker (104) being opened on the left inner wall of the installation box (101), and the information processing module (102) and the alarm speaker (104) being electrically connected to the control module (105).

3. The dust concentration detection alarm device according to claim 1, characterized in that: The protection mechanism comprises a U-shaped protection plate (4) sleeved on the detection head (103); a baffle (5) is fixedly connected to the bottom of the installation box (101); the left side of the baffle (5) is in movable contact with the right side of the U-shaped protection plate (4); the left side of the U-shaped protection plate (4) is fixedly connected to a connecting plate (3); the top of the connecting plate (3) is fixedly connected to the output shaft end of the multi-stage electric telescopic rod (2); and the right side of the connecting plate (3) is in movable contact with the left side of the installation box (101).

4. The dust concentration detection alarm device according to claim 1, characterized in that: The winding vertical adjustment mechanism includes a rotating shaft (7) rotatably installed in three installation grooves (6), three winding rollers (8) are fixedly sleeved on the rotating shaft (7), and the three winding rollers (8) are respectively located in the corresponding installation grooves (6). A winding wire (9) is wound and fixed on the winding roller (8), and the bottom end of the winding wire (9) is fixedly connected to the top of the installation box (101), the left end of the output shaft of the brake motor (10) is fixedly connected to the right end of the rotating shaft (7), and a guide sleeve is fixedly connected between the front inner wall and the rear inner wall of the installation groove (6), and the guide sleeve is movably sleeved on the corresponding winding wire (9).

5. The dust concentration detection alarm device according to claim 1, characterized in that: The clamping and fixing mechanism comprises two clamping sleeves (15), the two clamping sleeves (15) are fixedly connected to the front side and the rear side of the installation box (101) respectively, a clamping block (16) is movably clamped in the clamping sleeves (15), a U-shaped rod (13) is sleeved on the mounting seat (1), the left front part and the left rear part of the U-shaped rod (13) are fixedly connected to the right side of the corresponding clamping block (16), and the output shaft end of the first electric telescopic rod (14) is fixedly connected to the right top of the U-shaped rod (13).

6. The dust concentration detection alarm device according to claim 1, characterized in that: The front side of the brake motor (10), the front side of the multi-stage electric telescopic rod (2), and the front side of the first electric telescopic rod (14) are all fixedly connected to wireless remote control switches, and the three wireless remote control switches are matched with the same external remote control. The wireless remote control switch located on the multi-stage electric telescopic rod (2) is electrically connected to the multi-stage electric telescopic rod (2), and the other two wireless remote control switches are electrically connected to the controller (12).

7. The dust concentration detection alarm device according to claim 1, characterized in that: The right top and the right bottom of the installation box (101) are both provided with two grooves, the left inner wall of the groove is fixedly connected to a first magnet, the left top and the left bottom of the box cover are both fixedly connected to a second magnet, the second magnet is movably sleeved in the corresponding groove and is attracted to the first magnet, and the right side of the box cover is fixedly connected to a T-shaped handle.

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