Dust particle counter calibration device

Abstract

The utility model discloses a dust particle counter calibration device, which relates to the technical field of dust particles and comprises a U-shaped plate fixedly mounted at the top of a calibration device body, a winding roller is arranged in the U-shaped plate, dustproof cloth is wound on the winding roller, mounting plates are fixedly mounted at two ends of the winding roller respectively, and the mounting plates are fixedly mounted on the U-shaped plate. Rectangular clamping grooves are formed in the ends, away from each other, of the two mounting plates correspondingly, rotating pipes are rotationally mounted on the outer walls of the two sides of the U-shaped plate correspondingly, the ends, close to each other, of the two rotating pipes extend into the U-shaped plate correspondingly, and rectangular clamping plates are movably mounted in the two rotating pipes correspondingly; the sides, close to each other, of the two rectangular clamping plates extend into the two rectangular clamping grooves correspondingly. The dust particle counter calibration device provided by the utility model has the advantages of being convenient to use and preventing external dust from adhering to the operation panel to influence the service life of the operation panel.

Description

Technical Field

[0001] The utility model relates to the technical field of dust particles, in particular to a dust particle counter calibration device. Background Art

[0002] The dust particle counter is an instrument used to measure the number and size distribution of dust particles per unit volume in a clean environment. It can be widely used in drug testing institutes, blood centers, epidemic prevention stations, disease control centers,

[0003] Authoritative organizations such as quality supervision institutes, the electronics industry, pharmaceutical workshops, semiconductors, optical or precision machining, plastics, spray painting, hospitals, environmental protection, testing institutes, and other manufacturing enterprises and scientific research departments. A search revealed a patent document with authorization publication number CN219065196U that proposes a dust particle counter calibration device, comprising a calibration device housing, a through slot formed in one side outer wall of the calibration device housing, and a filter mechanism disposed on the inner wall at the bottom of the through slot. The filter mechanism comprises a mounting seat, a protective tube threadedly connected to the top outer wall of the mounting seat, and a connection port formed in the bottom outer wall of the protective tube, to which a filter tube is rotatably connected via the inner wall of the connection port.

[0004] However, the operation panel of the existing dust particle counter calibration device is directly exposed to the external environment and lacks a dustproof function. When people are not using the device, dust and impurities in the air adhere to the operation panel, affecting the service life of the display screen. Utility Model Content

[0005] The purpose of the present invention is to provide a dust particle counter calibration device to solve at least any one of the problems raised in the above background technology.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a dust particle counter calibration device, comprising a U-shaped plate fixedly mounted on the top of the calibration device body, a winding roller provided in the U-shaped plate, a dustproof cloth wound on the winding roller, mounting plates fixedly mounted on both ends of the winding roller, rectangular slots respectively provided at the ends of the two mounting plates away from each other, rotating tubes are rotatably mounted on the outer walls of both sides of the U-shaped plate, and the ends of the two rotating tubes close to each other extend into the U-shaped plate, rectangular clips are movably mounted in the two rotating tubes, and the sides of the two rectangular clips close to each other extend into the two rectangular slots respectively, limiting plates are fixedly mounted on the top and bottom of the two rectangular clips, and the four limiting plates are slidably connected to the corresponding rotating tubes.

[0007] Preferably, two limiting grooves are respectively provided on the inner walls of the two rotating tubes, and one side of the four limiting plates respectively extends into the corresponding limiting grooves and is slidably connected to the inner walls of the corresponding limiting grooves.

[0008] Preferably, a circular plate is fixedly sleeved on the two rotating tubes, and a torsion spring is movably sleeved on the two rotating tubes, and one end of the two torsion springs is fixedly connected to the corresponding circular plate, and the other end of the two torsion springs is fixedly connected to the inner wall of the U-shaped plate.

[0009] Preferably, a movable plate is fixedly installed on the outer wall of the two rectangular clamping plates on the side away from each other, and two elastic ropes are fixedly installed on the outer wall of the two movable plates on the side close to each other, and the four elastic ropes are fixedly connected to the corresponding rotating tubes.

[0010] Preferably, the surfaces of the two torsion springs are both tin-plated.

[0011] Preferably, a fixed Velcro is fixedly installed on the outer wall of the calibration device body, a horizontal plate is provided on the top of the U-shaped plate, and the horizontal plate is fixedly connected to the dustproof cloth, and a movable Velcro is fixedly installed on the top of the horizontal plate.

[0012] Preferably, a rotating screw is threadedly mounted on the U-shaped plate, and an L-shaped pressure rod is fixedly mounted on the rotating screw.

[0013] The beneficial effects of the utility model are as follows:

[0014] The L-shaped pressure rod is rotated in a counterclockwise direction to rotate to an inclined upward state, and then the movable horizontal plate is moved to drive the movable Velcro and the dustproof cloth to move under the L-shaped pressure rod, so that the movable Velcro is firmly adsorbed on the fixed Velcro. Then the needle rotates the L-shaped pressure rod downward to press the dustproof cloth tightly against the calibration device body, so that the dustproof cloth wraps the operation panel, preventing external dust from adhering to the operation panel when people are not using the device, thereby affecting the service life of the operation panel. The dustproof cloth is always subjected to a rotational tension by the torsion spring, so that the dustproof cloth is always in a taut state and tightly wraps the display screen. When the dustproof cloth is damaged, the two movable plates are moved away from each other to drive the rectangular card plate to move out of the rectangular card slot. The staff can remove the winding roller and the dustproof cloth from the device for replacement. The process is simple and fast, and the work efficiency is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic structural diagram of a preferred embodiment of a dust particle counter calibration device provided by the present invention;

[0016] Figure 2 for Figure 1 An enlarged schematic diagram of part A is shown;

[0017] Figure 3 for Figure 1 Schematic diagram of the L-shaped pressure rod shown;

[0018] Figure 4 for Figure 1 Assembly drawing of winding roller, dust sheet and mounting plate shown;

[0019] Figure 5 This is a three-dimensional diagram of the dust particle counter calibration device provided by the utility model.

[0020] In the figure: 1. Calibration device body; 2. U-shaped plate; 3. Winding roller; 4. Dustproof cloth; 5. Mounting plate; 6. Horizontal plate; 7. Moving Velcro; 8. Rectangular slot; 9. Rotating tube; 10. Rectangular card plate; 11. Elastic pull rope; 12. Limiting plate; 13. Torsion spring; 14. Circular plate; 15. Rotating screw; 16. L-shaped pressure rod; 17. Fixed Velcro; 18. Moving plate. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] The utility model provides Figure 1-5The dust particle counter calibration device shown in the figure includes a U-shaped plate 2 fixedly mounted on the top of the calibration device body 1, and the calibration operation is performed through the calibration device body 1. A winding roller 3 is provided in the U-shaped plate 2, and a dustproof cloth 4 is wound on the winding roller 3. Mounting plates 5 are fixedly mounted on both ends of the winding roller 3, and rectangular slots 8 are respectively provided at the ends of the two mounting plates 5 away from each other. Rotating tubes 9 are rotatably mounted on the outer walls of both sides of the U-shaped plate 2. Two through holes are provided on the U-shaped plate 2, and rotating bearings are fixedly mounted in the two through holes. The two rotating tubes 9 respectively penetrate the two rotating bearings and are fixedly connected to the inner walls of the two rotating bearings, and the ends of the two rotating tubes 9 close to each other are respectively provided with a plurality of rotating tubes 9. They all extend into the U-shaped plate 2, and rectangular clips 10 are movably installed in the two rotating tubes 9, and the sides of the two rectangular clips 10 close to each other extend into the two rectangular slots 8 respectively. The top and bottom of the two rectangular clips 10 are fixedly installed with limit plates 12, and the four limit plates 12 are respectively slidably connected with the corresponding rotating tubes 9. In order to limit the limit plates 12, and then the limit plates 12 rotate to drive the rotating tube 9 to rotate, and then the torsion spring 13 is changed from a free state to a stressed state, two limit grooves are respectively provided on the inner walls of the two rotating tubes 9, and one side of the four limit plates 12 extends into the corresponding limit grooves and is respectively slidably connected with the inner walls of the corresponding limit grooves.

[0023] In order to keep the dustproof cloth 4 in a tensioned state and thus tightly wrap the operation panel, a circular plate 14 is fixedly sleeved on the two rotating tubes 9, and a torsion spring 13 is movably sleeved on the two rotating tubes 9. In order to improve the service life of the torsion spring 13, the surfaces of the two torsion springs 13 are tinned, and one end of the two torsion springs 13 is fixedly connected to the corresponding circular plate 14, and the other ends of the two torsion springs 13 are fixedly connected to the inner wall of the U-shaped plate 2. The winding roller 3 is rotated by moving the cross plate 6 to release the dustproof cloth 4. The rotation of the winding roller 3 changes the torsion spring 13 from a free state to a stressed state, so that the dustproof cloth 4 is always subjected to the rotational force of a torsion spring 13. Under the action of this rotational force, the dustproof cloth 4 is always in a tensioned state, thereby more stably wrapping the display screen.

[0024] In order to ensure that one side of the rectangular clamping plate 10 is always located in the rectangular clamping groove 8 to clamp the mounting plate 5 without being affected by other external forces, a movable plate 18 is fixedly installed on the outer wall of the two rectangular clamping plates 10 on the side away from each other, and two elastic pull ropes 11 are fixedly installed on the outer wall of the two movable plates 18 on the side close to each other, and the four elastic pull ropes 11 are fixedly connected to the corresponding rotating tubes 9 respectively.

[0025] In order to ensure that the dustproof cloth 4 can be stably maintained in a state of covering the operation panel, a fixed Velcro 17 is fixedly installed on the outer wall of the calibration device body 1, a horizontal plate 6 is provided on the top of the U-shaped plate 2, and the horizontal plate 6 is fixedly connected to the dustproof cloth 4, and a movable Velcro 7 is fixedly installed on the top of the horizontal plate 6.

[0026] In order to press the dust-proof cloth 4 tightly against the calibration device body 1 and wrap the operation panel, a rotating screw 15 is threadedly installed on the U-shaped plate 2, and an L-shaped pressure rod 16 is fixedly installed on the rotating screw 15. By rotating the rotating screw 15 clockwise, the L-shaped pressure rod 16 is driven to rotate downward to press the dust-proof cloth 4 tightly against the calibration device body 1 and wrap the operation panel.

[0027] The working principle of the dust particle counter calibration device provided by the utility model is as follows: in the initial state, the elastic pull rope 11 is in a stretched state, and the torsion spring 13 is in a free state. The elastic pull rope 11 is used to make one side of the rectangular card plate 10 always located in the rectangular card slot 8 and the mounting plate 5 is clamped, so that the winding roller 3 is stably installed in the U-shaped plate 2. People perform calibration operations through the calibration device body 1. When people do not need to use this device, they first rotate the rotating screw 15 counterclockwise to drive the L-shaped pressure rod 16 to rotate to an inclined upward state, and then move the movable cross plate 6 to drive the movable Velcro 7 and the dustproof cloth 4 to move under the L-shaped pressure rod 16, and finally make the movable Velcro 7 contact with the fixed Velcro 17, firmly adsorb the movable Velcro 7 on the fixed Velcro 17, and then rotate the rotating screw 15 clockwise to drive the L-shaped pressure rod 16 to rotate downward to rotate the dustproof cloth When the dustproof cloth 4 is damaged, the two movable plates 18 are moved away from each other to drive the rectangular card plate 10 to move out of the rectangular card slot 8, so that the winding roller 3 changes from the clamping state to the free state. The staff can remove the winding roller 3 and the dustproof cloth 4 from the device for replacement. The process is simple and fast, and the work efficiency is high.

[0028] Compared with related technologies, the dust particle counter calibration device provided by the utility model has the following beneficial effects:

[0029] The L-shaped pressure rod 16 is rotated in a counterclockwise direction to rotate the L-shaped pressure rod 16 to an inclined upward state, and then the movable cross plate 6 is moved to drive the movable Velcro 7 and the dustproof cloth 4 to move under the L-shaped pressure rod 16, so that the movable Velcro 7 is firmly adsorbed on the fixed Velcro 17, and then the L-shaped pressure rod 16 is rotated downward to press the dustproof cloth 4 tightly on the calibration device body 1, so that the dustproof cloth 4 wraps the operation panel, preventing external dust from adhering to the operation panel when people are not using the device, thereby affecting the service life of the operation panel. The dustproof cloth 4 is always subjected to a rotating tension by the torsion spring 13, so that the dustproof cloth 4 is always in a tightened state and tightly wraps the display screen. When the dustproof cloth 4 is damaged, the two movable plates 18 are moved away from each other to drive the rectangular card plate 10 to move out of the rectangular card slot 8, and the staff can remove the winding roller 3 and the dustproof cloth 4 from the device for replacement. The process is simple and fast, and the work efficiency is high.

[0030] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A dust particle counter calibration device, comprising a U-shaped plate fixedly mounted on the top of the calibration device body, characterized in that: A winding roller is provided in the U-shaped plate, and a dustproof cloth is wound on the winding roller. Mounting plates are fixedly installed at both ends of the winding roller, and rectangular slots are respectively opened at the ends of the two mounting plates away from each other. Rotating tubes are rotatably installed on the outer walls of both sides of the U-shaped plate, and the ends of the two rotating tubes close to each other extend into the U-shaped plate, and rectangular clamping plates are movably installed in the two rotating tubes, and the sides of the two rectangular clamping plates close to each other extend into the two rectangular slots respectively. Limiting plates are fixedly installed on the top and bottom of the two rectangular clamping plates, and the four limiting plates are slidably connected to the corresponding rotating tubes.

2. A dust particle counter calibration device according to claim 1, characterized in that: Two limiting grooves are respectively formed on the inner walls of the two rotating tubes, and one side of the four limiting plates respectively extends into the corresponding limiting grooves and is slidably connected to the inner walls of the corresponding limiting grooves.

3. The dust particle counter calibration device according to claim 2, characterized in that: A circular plate is fixedly sleeved on the two rotating tubes, and a torsion spring is movably sleeved on the two rotating tubes. One end of the two torsion springs is fixedly connected to the corresponding circular plate, and the other end of the two torsion springs is fixedly connected to the inner wall of the U-shaped plate.

4. The dust particle counter calibration device according to claim 3, characterized in that: A movable plate is fixedly installed on the outer wall of the two rectangular clamping plates on the side away from each other, and two elastic ropes are fixedly installed on the outer wall of the two movable plates on the side close to each other, and the four elastic ropes are fixedly connected to the corresponding rotating tubes respectively.

5. The dust particle counter calibration device according to claim 4, characterized in that: Surfaces of the two torsion springs are both tin-plated.

6. The dust particle counter calibration device according to claim 5, characterized in that: A fixed Velcro is fixedly installed on the outer wall of the calibration device body, a horizontal plate is provided on the top of the U-shaped plate, and the horizontal plate is fixedly connected to the dustproof cloth, and a movable Velcro is fixedly installed on the top of the horizontal plate.

7. The dust particle counter calibration device according to claim 6, characterized in that: A rotating screw rod is threadedly mounted on the U-shaped plate, and an L-shaped pressure rod is fixedly mounted on the rotating screw rod.

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