Punching positioning device for mounting electric power metering box

Abstract

The invention relates to the technical field of electric power metering box installation, and discloses a punching positioning device for electric power metering box installation, which comprises a moving table, the top end of the moving table is fixedly connected with a lifting mechanism, the top end of the lifting mechanism is fixedly connected with a leveling mechanism, and the lower part of the top end of the lifting mechanism is fixedly connected with a dust collection mechanism. A fixing mechanism is fixedly connected to the top end of the lifting mechanism, a bubble level is fixedly connected to the side, away from the fixing mechanism, of the top end of the leveling mechanism, and a metering box body is placed at the top end of the fixing mechanism; when the movable limiting block is pulled, the connecting plate is driven to move, the supporting spring is compressed when the connecting plate moves, and after the metering box body is placed between the movable limiting block and the fixed limiting block, the supporting spring resets and drives the movable limiting block to move close to the fixed limiting block, so that metering box bodies of different sizes can be fixed; at the moment, the metering box body makes contact with the wall face, and the punching position can be rapidly determined.

Description

Technical Field

[0001] The invention relates to the technical field of electric power meter box installation, and more specifically to a drilling and positioning device for electric power meter box installation. Background Art

[0002] The power meter box is a device used for electric energy metering in 3~35kv, including a combination transformer, a box, an electric meter, a lightning arrester, a vacuum circuit breaker, etc. The current accuracy is 0.2S, and the voltage accuracy level is 0.2. The power meter box is mainly composed of a combination transformer and an electric meter box. The combination transformer is composed of two or three single-phase voltage transformers and current transformers;

[0003] When installing the power meter box, you need to use 4 expansion bolts to fix the meter box to the wall. First, determine the installation size and installation position according to the box size of the power meter box, draw lines on the wall, determine the location of the expansion bolts, fix the expansion bolts to the wall, and then fix the power meter box to the wall with expansion screws to complete the installation. However, the current power meter box has the following problems when installing:

[0004] When installing the power meter box, it is necessary to place the box on the wall to determine the location of the punch hole. The power meter box needs to be manually positioned, which will bring a burden to the on-site staff. The sizes of power meter boxes are different, so the current punch positioning device cannot be adapted to different power meter boxes, and when the power meter box is in contact with the wall, it cannot be guaranteed that the power meter box is in a relatively horizontal position. In this case, the finally installed power meter box is in a relatively tilted state, which is not conducive to the normal use of the power meter box.

[0005] When drilling before installing the electricity meter box, waste chips will remain underground after drilling in the front, and dust will be generated during drilling, which will have an adverse impact on the environment. Summary of the invention

[0006] In order to overcome the above-mentioned defects of the prior art, an embodiment of the present invention provides a drilling and positioning device for installing an electric power meter box to solve the technical problems raised in the background technology.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a drilling positioning device for installing an electric power meter box, comprising a mobile platform, a lifting mechanism is fixedly connected to the top of the mobile platform, a leveling mechanism is fixedly connected to the top of the lifting mechanism, a dust suction mechanism is fixedly connected below the top of the lifting mechanism, a fixing mechanism is fixedly connected to the top of the lifting mechanism, a bubble level is fixedly connected to the side of the top of the leveling mechanism away from the fixing mechanism, and a meter box body is placed on the top of the fixing mechanism;

[0008] The fixing mechanism includes a fixed limit block, the position of the fixed limit block is fixed by a leveling mechanism, the side of the fixed limit block is fixedly connected to a limit plate, the side of the limit plate away from the fixed limit block is fixedly connected to a sliding plate, the side of the sliding plate is movably connected to a connecting plate, the side of the connecting plate away from the fixed limit block is fixedly connected to a movable limit block, the sliding plate is provided with an avoidance hole adapted to the limit rod, and the side of the limit rod is movably sleeved with a supporting spring.

[0009] In a preferred embodiment, a sliding groove is provided inside the connecting plate for the sliding plate to move, and the supporting spring is located in the sliding groove of the connecting plate, the bottom end of the movable limit block is fixedly connected to a sliding block, and the top end of the lifting mechanism is provided with a sliding groove for the sliding block to slide.

[0010] In a preferred embodiment, the leveling mechanism includes an arc groove, the top of the arc groove is movably connected to an arc hemisphere, the side of the arc groove is fixedly connected to a baffle plate, the side of the arc hemisphere is in contact with the side of the baffle plate, the side of the arc hemisphere away from the arc groove is fixedly connected to a rotating shaft, the bottom end of the rotating shaft is fixedly connected to a half gear ring, the bottom end of the half gear ring is meshed with a gear set, the side of the gear set is meshed with a rotating wheel, and the circle of the arc hemisphere close to the side of the baffle plate coincides with the central axis of the rotating shaft.

[0011] In a preferred embodiment, the gear set includes an output gear fixedly connected to the rotating wheel, the side of the output gear is meshed with a retarder gear, the side of the retarder gear is fixedly connected to a synchronous gear, the side of the synchronous gear is meshed with a transmission gear, and the top of the transmission gear is meshed with the bottom end of the half gear ring.

[0012] In a preferred embodiment, the lifting mechanism includes a fixed platform that can be supported, a corner of the bottom end of the fixed platform is fixedly connected to a lifting block, the bottom end of the lifting block is fixedly connected to the top end of the movable platform, the side of the lifting block is movably connected to a first supporting leg, the internal thread of the lifting block is connected to a threaded rod, the bottom end of the side of the threaded rod is fixedly connected to a first bevel tooth, the side of the first bevel tooth is meshed with a second bevel tooth, and the side of the second bevel tooth away from the first bevel tooth is fixedly connected to a hand wheel.

[0013] In a preferred embodiment, a corner of the bottom end of the fixed platform away from the lifting block is fixedly connected to a limiting block, and a side of the limiting block is movably connected to a second supporting leg, the bottom end of the second supporting leg is fixedly connected to the top end of the movable platform, and the length of the limiting block is the same as that of the lifting block, and the top end of the second supporting leg and the first supporting leg are separated from the bottom end of the fixed platform.

[0014] In a preferred embodiment, the metering box body includes a collection box that can hold dust, a dust suction pipe is fixedly connected to the top of the collection box, an exhaust fan is fixedly connected to the side of the collection box away from the dust suction pipe, a filter plate is fixedly connected to the inside of the collection box, and the filter plate is located on the side of the exhaust fan close to the dust suction pipe.

[0015] Technical effects and advantages of the present invention:

[0016] 1. When the movable limit block of the present invention is pulled, the connecting plate is driven to move, and the fixed limit block fixes the positions of the limit plate and the sliding plate. Therefore, when the connecting plate moves, the supporting spring is compressed. After the metering box body is placed between the movable limit block and the fixed limit block, the supporting spring will reset and drive the movable limit block to move close to the fixed limit block, so that metering boxes of different sizes can be fixed. At this time, the metering box body is brought into contact with the wall, and the punching position can be quickly determined;

[0017] 2. The present invention observes the horizontal position of the metering box body through a bubble level. When the metering box body is not in a horizontal state, the rotating wheel is rotated. When the rotating wheel rotates, it drives the half gear ring to rotate after being transmitted by the gear set. When the half gear ring rotates, it drives the rotating shaft to rotate. The rotating shaft drives the arc hemisphere to rotate around the rotating shaft. When the arc hemisphere rotates, the horizontal position of the fixing mechanism above it and the metering box body can be adjusted to ensure that the metering box body is in a horizontal state, thereby improving the accuracy of punching.

[0018] 3. The present invention is provided with a collection box, a dust suction pipe, a filter plate and an exhaust fan. When drilling, the exhaust fan is started and exhausts air when started. Therefore, the collection box will suck air through the dust suction pipe. The dust suction pipe can suck the waste dust generated during drilling into the collection box, and the waste dust entering the collection box will be blocked by the filter plate and will not affect the exhaust fan. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0020] Figure 2 This is a schematic diagram of the structure of the present invention when the metering box body is not placed.

[0021] Figure 3 It is a schematic diagram of the overall structure of the fixing mechanism of the present invention.

[0022] Figure 4 It is a schematic diagram of the exploded structure of the fixing mechanism of the present invention.

[0023] Figure 5 It is a schematic diagram of the internal structure of the arc groove of the present invention.

[0024] Figure 6It is a schematic diagram of the internal structure of the shielding plate of the present invention.

[0025] Figure 7 It is a schematic diagram of the decomposed structure of the gear set of the present invention.

[0026] Figure 8 It is a schematic diagram of the lifting mechanism structure of the present invention.

[0027] Fig. 9 It is a schematic diagram of the internal structure of the first supporting leg of the present invention.

[0028] Fig.10 It is a schematic diagram of the structure of the dust collection mechanism of the present invention.

[0029] The accompanying drawings are marked as follows: 1. moving platform; 2. lifting mechanism; 201. fixed platform; 202. first supporting leg; 203. second supporting leg; 204. stop block; 205. lifting block; 206. threaded rod; 207. first bevel gear; 208. second bevel gear; 209. hand wheel; 3. leveling mechanism; 301. arc groove; 302. arc hemisphere; 303. rotating shaft; 304. shielding plate; 305. half gear ring; 306. gear set; 3061. output gear; 30 62. Retarder gear; 3063. Synchronous gear; 3064. Transmission gear; 307. Rotor; 4. Fixing mechanism; 401. Fixed limit block; 402. Movable limit block; 403. Sliding block; 404. Connecting plate; 405. Limit plate; 406. Sliding plate; 407. Limit rod; 408. Support spring; 5. Dust suction mechanism; 501. Collection box; 502. Dust suction pipe; 503. Filter plate; 504. Exhaust fan; 6. Measuring box body; 7. Bubble level. DETAILED DESCRIPTION

[0030] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention. In addition, the forms of the various structures recorded in the following embodiments are merely illustrative. The drilling and positioning device for the installation of an electric meter box involved in the present invention is not limited to the various structures recorded in the following embodiments. All other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0031] Reference Figure 1 and Figure 2The present invention provides a drilling and positioning device for installing an electric power meter box, comprising a mobile platform 1, a lifting mechanism 2 is fixedly connected to the top of the mobile platform 1, a leveling mechanism 3 is fixedly connected to the top of the lifting mechanism 2, a dust suction mechanism 5 is fixedly connected below the top of the lifting mechanism 2, a fixing mechanism 4 is fixedly connected to the top of the lifting mechanism 2, a bubble level 7 is fixedly connected to the side of the top of the leveling mechanism 3 away from the fixing mechanism 4, and a meter box body 6 is placed on the top of the fixing mechanism 4.

[0032] In the embodiment of the present application, when installing the electricity meter box, it is necessary to determine the drilling position, and when the meter box body 6 is installed, holes that need to be fixed will be reserved inside the meter box body 6. Therefore, when installing the meter box body 6, the meter box body 6 is placed on the wall and directly positioned through the holes in the meter box body 6. The present application can deliver the meter box body 6 to the location of the wall without manual holding, so one person can do the work, making the work easier.

[0033] Reference Figure 3 and Figure 4 The fixing mechanism 4 includes a fixed limit block 401, the position of the fixed limit block 401 is fixed by the leveling mechanism 3, the side of the fixed limit block 401 is fixedly connected to a limit plate 405, the side of the limit plate 405 away from the fixed limit block 401 is fixedly connected to a sliding plate 406, the side of the sliding plate 406 is movably connected to a connecting plate 404, the side of the connecting plate 404 away from the fixed limit block 401 is fixedly connected to a movable limit block 402, the sliding plate 406 is provided with an avoidance hole adapted to a limit rod 407, the side of the limit rod 407 is movably sleeved with a supporting spring 408, the connecting plate 404 is provided with a sliding groove for the sliding plate 406 to move, and the supporting spring 408 is located in the sliding groove of the connecting plate 404, the bottom end of the movable limit block 402 is fixedly connected to a slider 403, and the top of the lifting mechanism 2 is provided with a sliding groove for the slider 403 to slide.

[0034] In the embodiment of the present application, the meter box body 6 will be placed between the fixed limit block 401 and the movable limit block 402. When the movable limit block 402 is pulled apart, the support spring 408 will be compressed. After the movable limit block 402 is released, the support spring 408 will be reset so that the movable limit block 402 and the fixed limit block 401 will fix the meter box body 6. Therefore, the present application can automatically fix the meter box body 6 without holding the meter box body 6, thereby reducing the difficulty of work. When the movable limit block 402 is moving, the slider 403 slides in the leveling mechanism 3, so that the movable limit block 402 moves more smoothly, and the distance between the movable limit block 402 and the fixed limit block 401 can be adjusted. Therefore, the present application can fix meter box bodies 6 of different sizes.

[0035] Reference Figure 5 , Figure 6 as well as Figure 7 The leveling mechanism 3 includes an arc groove 301, the top of the arc groove 301 is movably connected with an arc hemisphere 302, the side of the arc groove 301 is fixedly connected with a shielding plate 304, the side of the arc hemisphere 302 is in contact with the side of the shielding plate 304, the side of the arc hemisphere 302 away from the arc groove 301 is fixedly connected with a rotating shaft 303, the bottom end of the rotating shaft 303 is fixedly connected with a half gear ring 305, the bottom end of the half gear ring 305 is meshed with a gear set 306, and the side of the gear set 306 is meshed with a rotating shaft Wheel 307, the circle of the arc hemisphere 302 close to the side of the baffle plate 304 coincides with the central axis of the rotating shaft 303, the gear set 306 includes an output gear 3061 fixedly connected to the rotating wheel 307, the side of the output gear 3061 is meshed with a slow gear 3062, the side of the slow gear 3062 is fixedly connected with a synchronous gear 3063, the side of the synchronous gear 3063 is meshed with a transmission gear 3064, and the top of the transmission gear 3064 is meshed with the bottom end of the half gear ring 305.

[0036] In the embodiment of the present application, when the rotating wheel 307 is rotated, the rotating wheel 307 drives the half gear ring 305 to rotate after being transmitted by the gear set 306. When the half gear ring 305 rotates, it drives the rotating shaft 303 to rotate. The rotating shaft 303 drives the arc hemisphere 302 to rotate around the rotating shaft 303. When the arc hemisphere 302 rotates, the horizontal position of the fixing mechanism 4 above it and the metering box body 6 can be adjusted to ensure that the metering box body 6 is in a horizontal state, and the center of the arc hemisphere 302 close to the side of the baffle plate 304 is aligned with the center of the rotating shaft 303. The central axis coincides, so that the arc hemisphere 302 can rotate smoothly in the arc groove 301. When the rotating wheel 307 is rotated, the rotating wheel 307 drives the slow gear 3062 to rotate through the output gear 3061. The diameter of the slow gear 3062 is larger than the output gear 3061, so that the slow gear 3062 is decelerated. The diameter of the synchronous gear 3063 is smaller than the diameter of the transmission gear 3064, so that the transmission gear 3064 is decelerated, and finally the rotation speed of the half gear ring 305 is slower, which is convenient for precise adjustment.

[0037] Reference Figure 8 and Fig. 9The lifting mechanism 2 includes a fixed platform 201 for support, a corner of the bottom end of the fixed platform 201 is fixedly connected to a lifting block 205, the bottom end of the lifting block 205 is fixedly connected to the top of the movable platform 1, the side of the lifting block 205 is movably connected to the first supporting leg 202, the internal thread of the lifting block 205 is connected to a threaded rod 206, the bottom end of the side of the threaded rod 206 is fixedly connected to a first bevel gear 207, the side of the first bevel gear 207 is meshed with a second bevel gear 208, and the second bevel gear 208 is engaged with the second bevel gear 208. 08 A hand-cranked wheel 209 is fixedly connected to the side away from the first bevel gear 207, a corner of the bottom end of the fixed platform 201 away from the lifting block 205 is fixedly connected to a limiting block 204, a second supporting leg 203 is movably connected to the side of the limiting block 204, the bottom end of the second supporting leg 203 is fixedly connected to the top end of the movable platform 1, and the length of the limiting block 204 is the same as the length of the lifting block 205, the second supporting leg 203 and the top end of the first supporting leg 202 are separated from the bottom end of the fixed platform 201.

[0038] In the embodiment of the present application, when the hand wheel 209 rotates, the first bevel gear 207 is driven to rotate through the second bevel gear 208. When the first bevel gear 207 rotates, the lifting block 205 moves upward. When the lifting block 205 moves upward, it drives the fixed platform 201 to move upward, and then the leveling mechanism 3 and the fixing mechanism 4 above the fixed platform 201 move to the preset position, so as to achieve the height adjustment of the metering box body 6 and ensure that the fixing mechanism 4 can be used in different environments. Only the first support leg 202 and the second support leg 203 are set to support the fixed platform 201, reduce the overall weight of the equipment, and facilitate the movement of the equipment. The limit block 204 can limit the moving position of the lifting block 205 to prevent the lifting block 205 from detaching from the first support leg 202 when moving upward and contacting the first bevel gear 207 when moving downward.

[0039] Reference Fig.10 The metering box body 6 includes a collection box 501 that can hold dust, a dust suction pipe 502 is fixedly connected to the top of the collection box 501, an exhaust fan 504 is fixedly connected to the side of the collection box 501 away from the dust suction pipe 502, and a filter plate 503 is fixedly connected to the inside of the collection box 501. The filter plate 503 is located on the side of the exhaust fan 504 close to the dust suction pipe 502. When the exhaust fan 504 is started, air will be exhausted, so the collection box 501 will inhale air through the dust suction pipe 502. The dust suction pipe 502 can suck the waste dust generated during punching into the collection box 501, and the waste dust entering the collection box 501 is blocked by the filter plate 503 to avoid affecting the exhaust fan 504.

[0040] The working principle of the present invention is as follows: the device is moved as a whole to the wall where the metering box body 6 needs to be installed by the mobile platform 1, and the hand wheel 209 is rotated. When the hand wheel 209 rotates, the first bevel gear 207 is driven to rotate through the second bevel gear 208. When the first bevel gear 207 rotates, the lifting block 205 moves upward. When the lifting block 205 moves upward, it drives the fixed platform 201 to move upward, thereby moving the leveling mechanism 3 and the fixing mechanism 4 above the fixed platform 201 to the preset position;

[0041] The movable limit block 402 is pulled open. When the movable limit block 402 is pulled open, the connecting plate 404 is driven to move, and the fixed limit block 401 is locked with the arc-shaped hemisphere 302 below. The fixed limit block 401 prevents the position of the sliding plate 406 from changing through the limit plate 405. Therefore, when the movable limit block 402 is pulled open, the supporting spring 408 is compressed. After the movable limit block 402 is pulled open, the metering box body 6 is placed between the fixed limit block 401 and the movable limit block 402 and then the movable limit block 402 is released. At this time, the compressed supporting spring 408 is reset. When the supporting spring 408 is reset, it drives the movable limit block 402 to move close to the fixed limit block 401, thereby fixing the metering box body 6. When the hand-cranked wheel 209 is turned again, the height of the metering box body 6 can be adjusted.

[0042] The horizontal position of the metering box body 6 is observed by the bubble level 7. When the metering box body 6 is tilted, the rotating wheel 307 is rotated. When the rotating wheel 307 rotates, the retarding gear 3062 is driven to rotate through the output gear 3061. The retarding gear 3062 drives the transmission gear 3064 to rotate through the synchronous gear 3063. When the transmission gear 3064 rotates, it drives the rotating shaft 303 to rotate through the half gear ring 305. When the rotating shaft 303 rotates, it drives the arc hemisphere 302 to rotate around the rotating shaft 303. The arc hemisphere 302 drives the upper fixing mechanism 4 and the metering box body 6 to rotate, so that the metering box body 6 is in a horizontal position;

[0043] When the metering box body 6 is in a horizontal position, the metering box body 6 contacts the wall, and the hole positions are marked through the preset hole positions in the metering box body 6. After marking, the metering box body 6 is removed, and holes are drilled at the marked positions. When drilling, the exhaust fan 504 is started. When the exhaust fan 504 is started, air will be exhausted, so the collection box 501 will suck air through the dust suction pipe 502. The dust suction pipe 502 can suck the waste dust generated during drilling into the collection box 501, and the waste dust entering the collection box 501 is blocked by the filter plate 503.

[0044] Finally: The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A drilling and positioning device for installing an electric power meter box, comprising a mobile station (1), characterized in that: The top of the mobile platform (1) is fixedly connected to a lifting mechanism (2), the top of the lifting mechanism (2) is fixedly connected to a leveling mechanism (3), a dust suction mechanism (5) is fixedly connected below the top of the lifting mechanism (2), the top of the lifting mechanism (2) is fixedly connected to a fixing mechanism (4), a bubble level (7) is fixedly connected to the side of the top of the leveling mechanism (3) away from the fixing mechanism (4), and a metering box body (6) is placed on the top of the fixing mechanism (4); The fixing mechanism (4) comprises a fixed limit block (401), the position of the fixed limit block (401) is fixed by the leveling mechanism (3), the side of the fixed limit block (401) is fixedly connected to a limit plate (405), the side of the limit plate (405) away from the fixed limit block (401) is fixedly connected to a sliding plate (406), the side of the sliding plate (406) is movably connected to a connecting plate (404), the side of the connecting plate (404) away from the fixed limit block (401) is fixedly connected to a movable limit block (402), the sliding plate (406) is provided with an avoidance hole matched with a limit rod (407) inside, and the side of the limit rod (407) is movably sleeved with a supporting spring (408).

2. A drilling and positioning device for installing an electric power meter box according to claim 1, characterized in that: A sliding groove is provided inside the connecting plate (404) for the sliding plate (406) to move, and the supporting spring (408) is located in the sliding groove of the connecting plate (404). The bottom end of the movable limit block (402) is fixedly connected to the sliding block (403), and the top end of the lifting mechanism (2) is provided with a sliding groove for the sliding block (403) to slide.

3. A drilling and positioning device for installing an electric power meter box according to claim 1, characterized in that: The leveling mechanism (3) comprises an arc groove (301), the top of the arc groove (301) is movably connected to an arc hemisphere (302), the side of the arc groove (301) is fixedly connected to a shielding plate (304), the side of the arc hemisphere (302) is in contact with the side of the shielding plate (304), the side of the arc hemisphere (302) away from the arc groove (301) is fixedly connected to a rotating shaft (303), the bottom end of the rotating shaft (303) is fixedly connected to a half gear ring (305), the bottom end of the half gear ring (305) is meshed with a gear set (306), the side of the gear set (306) is meshed with a rotating wheel (307), and the circle of the arc hemisphere (302) close to the side of the shielding plate (304) coincides with the central axis of the rotating shaft (303).

4. A drilling and positioning device for installing an electric power meter box according to claim 3, characterized in that: The gear set (306) comprises an output gear (3061) fixedly connected to the rotating wheel (307); a side surface of the output gear (3061) is meshed with a slow gear (3062); a side surface of the slow gear (3062) is fixedly connected with a synchronous gear (3063); a side surface of the synchronous gear (3063) is meshed with a transmission gear (3064); and a top end of the transmission gear (3064) is meshed with a bottom end of the half gear ring (305).

5. The drilling and positioning device for installing an electric power meter box according to claim 1, characterized in that: The lifting mechanism (2) comprises a fixed platform (201) capable of supporting, a corner of the bottom end of the fixed platform (201) is fixedly connected to a lifting block (205), the bottom end of the lifting block (205) is fixedly connected to the top end of the movable platform (1), the side of the lifting block (205) is movably connected to a first supporting leg (202), the internal thread of the lifting block (205) is connected to a threaded rod (206), the bottom end of the side of the threaded rod (206) is fixedly connected to a first bevel tooth (207), the side of the first bevel tooth (207) is meshed with a second bevel tooth (208), and the side of the second bevel tooth (208) away from the first bevel tooth (207) is fixedly connected to a hand-cranked wheel (209).

6. A drilling and positioning device for installing an electric power meter box according to claim 5, characterized in that: A corner of the bottom end of the fixed platform (201) away from the lifting block (205) is fixedly connected to a limiting block (204); a side of the limiting block (204) is movably connected to a second supporting leg (203); the bottom end of the second supporting leg (203) is fixedly connected to the top end of the movable platform (1); the length of the limiting block (204) is the same as that of the lifting block (205); the top ends of the second supporting leg (203) and the first supporting leg (202) are separated from the bottom end of the fixed platform (201).

7. A drilling and positioning device for installing an electric power meter box according to claim 1, characterized in that: The metering box body (6) comprises a collection box (501) capable of accommodating dust, the top of the collection box (501) being fixedly connected to a dust suction pipe (502), a side of the collection box (501) away from the dust suction pipe (502) being fixedly connected to an exhaust fan (504), and a filter plate (503) being fixedly connected inside the collection box (501), the filter plate (503) being located on a side of the exhaust fan (504) close to the dust suction pipe (502).

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