An air filter performance detection device

Abstract

The present invention is applicable to the field of air filter detection, and provides an air filter performance detection device, which includes a detection box and a detection module. The top of the detection box is movably connected with an end sealing cover. The bottom of the detection box is provided with a dust gas inlet pipe, and the dust gas inlet pipe is connected to a dust generator. The top of the end sealing cover is provided with an exhaust pipe. It further includes: a rectangular partition fixed in the detection box, a rectangular notch is provided in the middle of the rectangular partition, and two top sealing clamping plates are horizontally slidably connected to the top of the rectangular partition, and the horizontal projections of the two top sealing clamping plates coincide. Through the top sealing clamping plate, the bottom sealing clamping plate, the top clamping column and the sealing plate, the present invention can perform performance detection on square air filters and cylindrical air filters, thereby reducing the number of detection devices, lowering the detection cost, and when performing performance detection on different types of air filters, there is no need to replace the detection device, reducing the detection process and improving the detection efficiency.

Description

Technical Field

[0001] The present invention belongs to the field of air filter detection, and particularly relates to an air filter performance detection device. Background Art

[0002] An air filter, also known as an air filter element, air filter cartridge, air cleaner, and air duct, etc., can effectively remove particulate matter, harmful gases, and other pollutants in the air. During the production of air filters, it is necessary to detect the performance such as the filtration efficiency and resistance characteristics of the air filter.

[0003] When detecting the performance of an air filter, the air filter is installed in the detection device, and dust gas is input from one end of the air filter, and then the particle concentration and pressure difference of the gas on the input and output sides of the air filter are detected. For example, an air filter detection device disclosed in CN210665427U detects the air circulation rate inside a cylindrical filter element.

[0004] Due to different usage scenarios, the shapes of air filters vary greatly, including cylindrical air filters and square air filters. However, existing air filter performance detection devices generally have functional limitations and can only detect the performance of air filters of a single structural type (cylindrical or square). This technical defect results in the need to configure multiple dedicated devices to cover the test requirements of different types of air filters when detecting different types of air filters. When detecting different types of air filters, it is necessary to frequently switch the adapter devices, which not only significantly increases the hardware input cost of the detection link but also reduces the detection efficiency due to differences in the device operation processes, resulting in double constraints on the usability and economy. Summary of the Invention

[0005] The purpose of the embodiments of the present invention is to provide an air filter performance detection device, aiming to solve the problems that existing detection devices can only detect the performance of air filters of a single structural type (cylindrical or square), resulting in low detection efficiency and high detection cost.

[0006] The present invention is implemented as follows. An air filter performance detection device includes a detection box and a detection module. The top of the detection box is movably connected with an end sealing cover. The bottom of the detection box is provided with a dust gas inlet pipe, and the dust gas inlet pipe is connected to a dust generator. The top of the end sealing cover is provided with an exhaust pipe. It further includes: a U-shaped partition fixed inside the detection box. A rectangular notch is provided in the middle of the U-shaped partition. Two top sealing clamping plates are horizontally slidably connected to the top of the U-shaped partition, and the horizontal projections of the two top sealing clamping plates coincide. Two bottom sealing clamping plates are horizontally slidably connected to the bottom of the U-shaped partition, and the horizontal projections of the two bottom sealing clamping plates coincide. The moving directions of the top sealing clamping plate and the bottom sealing clamping plate are perpendicular to each other. A top clamping column is vertically slidably connected to the end sealing cover. One end of the top clamping column close to the detection box is provided with a vertical communication pipe 1. At least one horizontal communication pipe 2 is provided on the top clamping column. One end of the communication pipe 2 communicates with the communication pipe 1, and the other end of the communication pipe 2 penetrates through the side wall of the top clamping column. A sealing plate is fixed on the side wall of the top clamping column inside the end sealing cover. The size of the sealing plate is larger than the size of the rectangular notch on the U-shaped partition. A plugging sleeve is fixed on the top of the end sealing cover. The top clamping column is arranged inside the plugging sleeve. A bottom clamping plate that can move vertically is provided below the U-shaped partition.

[0007] A further technical solution is that the detection module includes sensors for detecting the particle concentration installed in both the dust gas inlet pipe and the exhaust pipe, and a differential pressure sensor for testing the differential pressure of the air filter connected to the dust gas inlet pipe and the exhaust pipe.

[0008] A further technical solution is that horizontal movement components are provided at both the upper and lower ends of the U-shaped partition. The horizontal movement components include a telescopic rod 1 fixed to the side wall of the detection box. The telescopic end of the telescopic rod 1 is connected to one of the top sealing clamping plates or one of the bottom sealing clamping plates. A rack 2 is connected to one of the top sealing clamping plates or one of the bottom sealing clamping plates. A gear is rotatably connected to the upper or lower end of the U-shaped partition. An L-shaped mounting rod is connected to the other top sealing clamping plate or the other bottom sealing clamping plate. A rack 1 is fixed to the side wall of the L-shaped mounting rod. The rack 1 and the rack 2 are simultaneously engaged with the gear.

[0009] A further technical solution is that two guiding grooves are provided at one end of the bottom clamping plate. Two V-shaped positioning blocks are slidably connected in the two guiding grooves. Compression springs are connected to the two V-shaped positioning blocks. The ends of the two compression springs are respectively fixed in the two guiding grooves. Push shafts are fixed to the lower ends of the two bottom sealing clamping plates. Two avoiding notches for avoiding the movement of the push shafts are symmetrically provided at both ends of the bottom clamping plate. Transmission rods are connected to the two V-shaped positioning blocks. The push shafts cooperate with the transmission rods.

[0010] Further technical solution: A vertical movement component for driving the bottom clamping plate to move vertically is provided at the bottom of the detection box. The vertical movement component includes a concave-shaped moving frame slidably connected vertically to the bottom of the detection box and a third telescopic rod fixed to the bottom of the detection box. The telescopic end of the third telescopic rod is connected to the concave-shaped moving frame. The bottom clamping plate is rotatably connected to the upper part of the concave-shaped moving frame. A limit bolt is threadedly connected to the side wall of the concave-shaped moving frame, and the limit bolt contacts the side wall of the bottom clamping plate.

[0011] Further technical solution: A soft circular sealing gasket is installed at one end of the bottom clamping plate. Ring-shaped protrusions of different sizes are sequentially arranged on the circular sealing gasket from the center to the outside. A plurality of support rib plates are evenly installed at the other end of the bottom clamping plate.

[0012] Further technical solution: A mounting frame is fixed to the top of the end sealing cover. The top clamping column is slidably connected to the mounting frame. A second telescopic rod is fixed to the top of the mounting frame, and the telescopic end of the second telescopic rod is connected to the top of the top clamping column.

[0013] Further technical solution: A guiding shaft is fixed to the side wall of the end sealing cover. The guiding shaft is slidably connected vertically to the side wall of the detection box. A fourth telescopic rod is fixed to the side wall of the detection box, and the telescopic end of the fourth telescopic rod is connected to the side wall of the end sealing cover.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] 1. Through the top sealing clamping plate, bottom sealing clamping plate, top clamping column and sealing plate, the present invention can perform performance detection on square air filters and cylindrical air filters, thereby reducing the number of detection devices, lowering the detection cost. When performing performance detection on different types of air filters, there is no need to replace the detection device, reducing the detection process and improving the detection efficiency.

[0016] 2. When the two bottom sealing clamping plates drive the two push shafts to move synchronously towards each other, the push shafts push the transmission rod, and then the transmission rod drives the V-shaped positioning block against the elastic force of the compression spring. The two V-shaped positioning blocks move synchronously towards each other to correct the position of the cylindrical air filter, making the cylindrical air filter coaxial with the top clamping column, which is convenient for the top clamping column to seal the upper end of the cylindrical air filter.

[0017] 3. Rotate the bottom clamping plate to adjust the support surface of the bottom clamping plate, so that the support rib plates support the lower end of the square air filter, increasing the stability during the detection of the square air filter, or making the ring-shaped protrusions on the circular sealing gasket improve the sealing effect of the lower end of the cylindrical air filter. Description of the Drawings

[0018] Figure 1 Schematic structural diagram of an air filter performance detection device provided by the present invention;

[0019] Figure 2 Provided by the present invention Figure 1 Internal structural diagram of the detection box in;

[0020] Figure 3 Provided by the present invention Figure 1 Schematic connection structure diagram of the return partition in;

[0021] Figure 4 Provided by the present invention Figure 3 Schematic structural diagram of the upward tilt angle of the return partition in;

[0022] Figure 5 Provided by the present invention Figure 1 Internal structural diagram of the end sealing cover and the top clamping column in;

[0023] Figure 6 Provided by the present invention Figure 2 Schematic structural diagram of the bottom clamping plate and the vertical moving component in;

[0024] Figure 7 Provided by the present invention Figure 6 Schematic connection structure diagram of the bottom clamping plate in;

[0025] Figure 8 Schematic structural diagram of an air filter performance detection device provided by the present invention for detecting a square air filter;

[0026] Figure 9 Schematic structural diagram of an air filter performance detection device provided by the present invention for detecting a tubular air filter.

[0027] In the drawings: 101, detection box; 102, end sealing cover; 103, return partition; 104, dust gas inlet pipe; 105, exhaust pipe; 106, top sealing clamping plate; 107, bottom sealing clamping plate; 108, top clamping column; 109, sealing plate; 110, communication pipe one; 111, communication pipe two; 112, plugging sleeve; 113, bottom clamping plate; 114, circular sealing gasket; 115, support rib plate;

[0028] 2, horizontal moving component; 201, telescopic rod one; 202, L-shaped mounting rod; 203, rack one; 204, rack two; 205, gear; 301, mounting frame; 302, telescopic rod two;

[0029] 4. Vertical moving component; 401. Concave moving frame; 402. Third telescopic rod; 403. Limit bolt; 501. Guide groove; 502. V-shaped positioning block; 503. Compression spring; 504. Transmission rod; 505. Avoidance notch; 506. Push shaft; 601. Guide shaft; 602. Fourth telescopic rod. Detailed implementation mode

[0030] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0031] The following describes the specific implementation of the present invention in detail with reference to specific embodiments.

[0032] Such as Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 8 and Figure 9As shown in the figure, a performance detection device for an air filter provided by an embodiment of the present invention includes a detection box 101 and a detection module. An end sealing cover 102 is movably connected to the top of the detection box 101. A dust gas inlet pipe 104 is installed at the bottom of the detection box 101. The dust gas inlet pipe 104 is connected to a dust generator. An exhaust pipe 105 is installed at the top of the end sealing cover 102. It further includes: a rectangular partition 103 fixed inside the detection box 101. The upper and lower ends of the rectangular partition 103 are respectively a filtered gas storage space and an unfiltered gas storage space. A rectangular notch is provided in the middle of the rectangular partition 103. Two top sealing clamping plates 106 are slidably connected in the horizontal direction at the top of the rectangular partition 103. The horizontal projections of the two top sealing clamping plates 106 coincide. Two bottom sealing clamping plates 107 are slidably connected in the horizontal direction at the bottom of the rectangular partition 103. The horizontal projections of the two bottom sealing clamping plates 107 coincide. The moving directions of the top sealing clamping plates 106 and the bottom sealing clamping plates 107 are perpendicular to each other. A top clamping column 108 is slidably connected vertically on the end sealing cover 102. A vertical communication pipe 110 is provided at one end of the top clamping column 108 close to the detection box 101. At least one horizontal communication pipe 111 is provided on the top clamping column 108. One end of the communication pipe 111 is communicated with the communication pipe 110. The other end of the communication pipe 111 penetrates the side wall of the top clamping column 108. A sealing plate 109 is fixed on the side wall of the top clamping column 108 located inside the end sealing cover 102. The size of the sealing plate 109 is larger than the size of the rectangular notch on the rectangular partition 103. A plugging sleeve 112 is fixed on the top of the end sealing cover 102. The top clamping column 108 is arranged inside the plugging sleeve 112. A bottom clamping plate 113 that can move vertically is provided below the rectangular partition 103. The detection module includes sensors for detecting the particle concentration installed in both the dust gas inlet pipe 104 and the exhaust pipe 105. The sensors include laser sensors, infrared sensors, TSP sensors, etc., and a differential pressure sensor for testing the differential pressure of the air filter connected to the dust gas inlet pipe 104 and the exhaust pipe 105. The differential pressure sensor has two nozzles. The two nozzles are respectively connected to air pipes. The ends of the two air pipes are respectively installed in the dust gas inlet pipe 104 and the exhaust pipe 105.

[0033] In the embodiment of the present invention, when detecting a square air filter, the square air filter is placed in the rectangular notch of the rectangular partition 103. The two top sealing clamping plates 106 and the two bottom sealing clamping plates 107 both move towards each other. Thus, the two top sealing clamping plates 106 and the two bottom sealing clamping plates 107 respectively clamp the four side walls of the square air filter, and the two top sealing clamping plates 106 and the two bottom sealing clamping plates 107 block the redundant part of the rectangular notch (such as Figure 8As shown in the figure, the two top sealing clamping plates 106 and the two bottom sealing clamping plates 107 not only play the role of clamping the square air filter, but also play the role of partitioning. The end sealing cover 102 is covered on the upper end of the detection box 101. The dust generator releases dust gas to the bottom of the detection box 101 through the dust gas inlet pipe 104. To change the pressure at the bottom of the detection box 101, a blower can be connected to the bottom of the detection box 101 to change the gas pressure at the bottom of the detection box 101. The dust gas at the bottom of the detection box 101 enters the upper end of the rectangular partition 103 after being filtered by the square air filter, and then is discharged from the exhaust pipe 105. The differential pressure sensor and the sensor for detecting the dust concentration in the air detect the dust concentration and the pressure difference at the input end and the output end of the square air filter;

[0034] When detecting the cylindrical air filter, one end of the cylindrical air filter is placed on the bottom clamping plate 113, and the end sealing cover 102 is covered on the upper end of the detection box 101. The top clamping column 108 moves downward (in the initial state, the communication pipe two 111 on the side wall of the top clamping column 108 is blocked by the blocking sleeve 112). The communication pipe two 111 on the side wall of the top clamping column 108 enters the space between the end sealing cover 102 and the rectangular partition 103. The top clamping column 108 drives the sealing plate 109 to move downward, so that the sealing plate 109 covers the rectangular notch on the rectangular partition 103, thereby sealing the redundant part on the rectangular notch. A soft gasket such as a rubber gasket can be installed at the lower end of the sealing plate 109, so as to make the sealing of the rectangular notch more complete. The bottom clamping plate 113 drives the cylindrical air filter to move upward, so that the conical end at the bottom of the top clamping column 108 is inserted into the upper part of the cylindrical air filter, so that both ends of the cylindrical air filter are sealed by the top clamping column 108 and the bottom clamping plate 113 respectively (as Figure 9 ), the dust gas at the bottom of the detection box 101 enters the cylindrical air filter after being filtered by the side wall of the cylindrical air filter. The filtered gas in the cylindrical air filter enters above the rectangular partition 103 through the communication pipe one 110 and the communication pipe two 111, and then is discharged from the exhaust pipe 105. The differential pressure sensor and the sensor for detecting the dust concentration in the air detect the dust concentration and the pressure difference at the input end and the output end of the cylindrical air filter;

[0035] Through the top sealing clamping plate 106, the bottom sealing clamping plate 107, the top clamping column 108 and the sealing plate 109, the present invention can perform performance detection on the square air filter and the cylindrical air filter, thereby reducing the number of detection devices, reducing the detection cost. When performing performance detection on different types of air filters, there is no need to replace the detection device, reducing the detection process and improving the detection efficiency.

[0036] As Figure 1 、 Figure 2 、Figure 3 , Figure 4 and Figure 8 As shown in and

[0037] , as a preferred embodiment of the present invention, horizontal movement components 2 are provided at both the upper and lower ends of the U-shaped partition 103. The horizontal movement components 2 include a first telescopic rod 201 fixed to the side wall of the detection box 101. The telescopic end of the first telescopic rod 201 is connected to one of the top sealing clamping plates 106 or one of the bottom sealing clamping plates 107. A second rack 204 is connected to one of the top sealing clamping plates 106 or one of the bottom sealing clamping plates 107. A gear 205 is rotatably connected to the upper or lower end of the U-shaped partition 103. An L-shaped mounting rod 202 is connected to the other top sealing clamping plate 106 or the other bottom sealing clamping plate 107. A first rack 203 is fixed to the side wall of the L-shaped mounting rod 202. The first rack 203 and the second rack 204 are both engaged with the gear 205.

[0037] In the embodiment of the present invention, the first telescopic rod 201 can be an electric telescopic rod, a cylinder or a hydraulic cylinder, etc. When detecting the square air filter, the first telescopic rod 201 extends. The first telescopic rod 201 drives one of the top sealing clamping plates 106 or the bottom sealing clamping plate 107 to move. One of the top sealing clamping plates 106 or the bottom sealing clamping plate 107 drives the second rack 204 to move. The second rack 204 drives the gear 205 to rotate. The gear 205 drives the first rack 203 to move in the opposite direction. The first rack 203 drives the L-shaped mounting rod 202 to move in the opposite direction. The L-shaped mounting rod 202 drives the other top sealing clamping plate 106 or the bottom sealing clamping plate 107 to move in the opposite direction, so that the two top sealing clamping plates 106 move towards or away from each other synchronously, and the two bottom sealing clamping plates 107 move towards or away from each other synchronously.

[0038] As Figure 2 , Figure 4 , Figure 6 and Figure 7 As shown in and

[0039] , as a preferred embodiment of the present invention, two guiding grooves 501 are provided at one end of the bottom clamping plate 113. Two V-shaped positioning blocks 502 are slidably connected in the two guiding grooves 501. Two compression springs 503 are connected to the two V-shaped positioning blocks 502. The ends of the two compression springs 503 are respectively fixed in the two guiding grooves 501. Two push shafts 506 are fixed to the lower ends of the two bottom sealing clamping plates 107. Two avoiding notches 505 for avoiding the movement of the push shafts 506 are symmetrically provided at both ends of the bottom clamping plate 113. Two transmission rods 504 are connected to the two V-shaped positioning blocks 502. The push shafts 506 cooperate with the transmission rods 504.

[0039] In an embodiment of the present invention, when two bottom sealing clamping plates 107 drive two push shafts 506 to move synchronously towards each other, the push shafts 506 push the transmission rod 504, and then the transmission rod 504 drives the V-shaped positioning block 502 against the elastic force of the compression spring 503. The two V-shaped positioning blocks 502 move synchronously towards each other to correct the position of the cylindrical air filter, so that the cylindrical air filter is coaxially arranged with the top clamping column 108, facilitating the top clamping column 108 to seal the upper end of the cylindrical air filter;

[0040] When the two bottom sealing clamping plates 107 move synchronously in the opposite direction, the compression spring 503 elongates and drives the V-shaped positioning block 502 to move in the opposite direction, so that the two V-shaped positioning blocks 502 move in the opposite direction and reset.

[0041] As Figure 2 、 Figure 4 、 Figure 6 and Figure 7 shown, as a preferred embodiment of the present invention, a vertical movement component 4 for driving the bottom clamping plate 113 to move vertically is provided at the bottom of the detection box 101. The vertical movement component 4 includes a concave moving frame 401 vertically slidably connected to the bottom of the detection box 101, and a telescopic rod three 402 fixed to the bottom of the detection box 101. The telescopic end of the telescopic rod three 402 is connected to the concave moving frame 401. The bottom clamping plate 113 is rotatably connected to the upper part of the concave moving frame 401. A limit bolt 403 is threadedly connected to the side wall of the concave moving frame 401, and the limit bolt 403 contacts the side wall of the bottom clamping plate 113; a soft circular sealing pad 114 is installed at one end of the bottom clamping plate 113. Annular protrusions of different sizes are sequentially arranged on the circular sealing pad 114 from the center to the outside, and a plurality of support ribs 115 are evenly installed at the other end of the bottom clamping plate 113.

[0042] In an embodiment of the present invention, the telescopic rod three 402 adopts an electric telescopic rod, a cylinder or a hydraulic cylinder, etc. When the telescopic rod three 402 elongates, the telescopic rod three 402 drives the concave moving frame 401 to move upward, and the concave moving frame 401 drives the bottom clamping plate 113 to move upward. When the telescopic rod three 402 contracts, the telescopic rod three 402 drives the concave moving frame 401 to move downward, and the concave moving frame 401 drives the bottom clamping plate 113 to move downward;

[0043] When performing performance detection on the cylindrical air filter, the circular sealing pad 114 on the bottom clamping plate 113 faces upward. The bottom clamping plate 113 is used to support and seal the lower end of the cylindrical air filter. The annular protrusions on the circular sealing pad 114 can improve the sealing effect of the lower end of the cylindrical air filter. The push shaft 506 moves in the avoidance notch 505 provided with the transmission rod 504, so that the push shaft 506 can push the transmission rod 504;

[0044] When performing performance detection on the square air filter, the support rib 115 on the bottom clamping plate 113 faces upward, and the height of the bottom clamping plate 113 is adjusted so that the support rib 115 supports the lower end of the square air filter, increasing the stability during the detection of the square air filter. The push shaft 506 moves within the avoidance notch 505 of the transmission rod 504 without it.

[0045] Loosen the limit bolt 403 so that the limit bolt 403 does not contact the side wall of the bottom clamping plate 113. The bottom clamping plate 113 can be rotated to adjust the support surface of the bottom clamping plate 113, and then the limit bolt 403 is tightened so that the limit bolt 403 abuts against the side wall of the bottom clamping plate 113, fixing the bottom clamping plate 113 to the concave moving frame 401.

[0046] As Figure 1 and Figure 5 shown, as a preferred embodiment of the present invention, an installation frame 301 is fixed on the top of the end sealing cover 102. The top clamping column 108 is slidably connected to the installation frame 301. An expansion rod two 302 is fixed on the top of the installation frame 301, and the telescopic end of the expansion rod two 302 is connected to the top of the top clamping column 108.

[0047] In the embodiment of the present invention, when the expansion rod two 302 extends, the expansion rod two 302 drives the top clamping column 108 to move downward, so that the communication pipe two 111 on the top clamping column 108 disengages from the plugging sleeve 112; when the expansion rod two 302 contracts, the expansion rod two 302 drives the top clamping column 108 to move upward, so that the communication pipe two 111 on the top clamping column 108 enters the plugging sleeve 112, and the plugging sleeve 112 plugs the communication pipe two 111.

[0048] As Figure 1 shown, as a preferred embodiment of the present invention, a guide shaft 601 is fixed on the side wall of the end sealing cover 102. The guide shaft 601 is vertically slidably connected to the side wall of the detection box 101. An expansion rod four 602 is fixed on the side wall of the detection box 101, and the telescopic end of the expansion rod four 602 is connected to the side wall of the end sealing cover 102.

[0049] In the embodiment of the present invention, when the expansion rod four 602 extends, under the guiding action of the guide shaft 601, the expansion rod four 602 drives the end sealing cover 102 to move upward, moving the end sealing cover 102 away from the upper end of the detection box 101, facilitating the placement and taking of the air filter; when the expansion rod four 602 contracts, under the guiding action of the guide shaft 601, the expansion rod four 602 drives the end sealing cover 102 to move downward, covering the end sealing cover 102 on the upper end of the detection box 101.

[0050] In the above embodiments of the present invention, an air filter performance detection device is provided. When detecting a square air filter, when the third telescopic rod 402 extends, the third telescopic rod 402 drives the concave moving frame 401 to move upward. The concave moving frame 401 drives the bottom clamping plate 113 to move upward. Place the square air filter in the rectangular notch of the return-shaped partition plate 103. The support rib plate 115 supports the lower end of the square air filter. The two top sealing clamping plates 106 and the two bottom sealing clamping plates 107 both move towards each other. Thus, the two top sealing clamping plates 106 and the two bottom sealing clamping plates 107 clamp the four side walls of the square air filter respectively, and the two top sealing clamping plates 106 and the two bottom sealing clamping plates 107 block the redundant part of the rectangular notch (as Figure 8 shown). The two top sealing clamping plates 106 and the two bottom sealing clamping plates 107 not only play the role of clamping the square air filter, but also play the role of partitioning. Cover the end sealing cover 102 on the upper end of the detection box 101. The dust generator releases dust gas to the bottom of the detection box 101 through the dust gas inlet pipe 104. To change the pressure at the bottom of the detection box 101, a fan can be connected to the bottom of the detection box 101 to change the gas pressure at the bottom of the detection box 101 through the fan. The dust gas at the bottom of the detection box 101 enters the upper end of the return-shaped partition plate 103 after being filtered by the square air filter, and then is discharged from the exhaust pipe 105. The differential pressure sensor and the sensor for detecting the dust concentration in the air detect the dust concentration and the pressure difference at the input end and the output end of the square air filter;

[0051] When detecting a cylindrical air filter, the circular sealing gasket 114 on the bottom clamping plate 113 faces upward. Place one end of the cylindrical air filter on the bottom clamping plate 113. Cover the end sealing cover 102 on the upper end of the detection box 101. The top clamping column 108 moves downward (in the initial state, the communication pipe 111 on the side wall of the top clamping column 108 is blocked by the blocking sleeve 112). The communication pipe 111 on the side wall of the top clamping column 108 enters the space between the end sealing cover 102 and the return-shaped partition plate 103. The top clamping column 108 drives the sealing plate 109 to move downward, so that the sealing plate 109 covers the rectangular notch of the return-shaped partition plate 103, thereby sealing the redundant part on the rectangular notch. A soft gasket such as a rubber gasket can be installed at the lower end of the sealing plate 109, so that the sealing of the rectangular notch is more complete. The bottom clamping plate 113 drives the cylindrical air filter to move upward, so that the tapered end at the bottom of the top clamping column 108 is inserted into the upper part of the cylindrical air filter, thereby sealing the two ends of the cylindrical air filter by the top clamping column 108 and the bottom clamping plate 113 respectively (as Figure 9), the dust gas at the bottom inside the detection box 101 enters the cylindrical air filter after being filtered by the side wall of the cylindrical air filter. The filtered gas inside the cylindrical air filter enters above the return-shaped partition plate 103 through the first connecting pipe 110 and the second connecting pipe 111, and then is discharged from the exhaust pipe 105. The differential pressure sensor and the sensor for detecting the dust concentration in the air detect the dust concentration and the pressure difference at the input end and the output end of the cylindrical air filter;

[0052] Through the top sealing clamping plate 106, the bottom sealing clamping plate 107, the top clamping column 108 and the sealing plate 109, the present invention can perform performance detection on the square air filter and the cylindrical air filter, thereby reducing the number of detection devices, reducing the detection cost, and when performing performance detection on different types of air filters, there is no need to replace the detection device, reducing the detection process and improving the detection efficiency.

[0053] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An air filter performance detection device, comprising a detection box and a detection module. The top of the detection box is movably connected with an end sealing cover. The bottom of the detection box is provided with a dust gas inlet pipe, and the dust gas inlet pipe is connected to a dust generator. The top of the end sealing cover is provided with an exhaust pipe, and it is characterized in that, It further includes: A fixed paperclip partition inside the detection box. A rectangular notch is provided in the middle of the paperclip partition. Two top sealing clamping plates are slidably connected in the horizontal direction at the top of the paperclip partition. The horizontal projections of the two top sealing clamping plates coincide. Two bottom sealing clamping plates are slidably connected in the horizontal direction at the bottom of the paperclip partition. The horizontal projections of the two bottom sealing clamping plates coincide. The moving directions of the top sealing clamping plate and the bottom sealing clamping plate are perpendicular to each other; A top clamping column is slidably connected vertically on the end sealing cover. A vertical connecting pipe one is provided at one end of the top clamping column close to the detection box. At least one horizontal connecting pipe two is provided on the top clamping column. One end of the connecting pipe two is communicated with the connecting pipe one, and the other end of the connecting pipe two penetrates through the side wall of the top clamping column; A sealing plate is fixed on the side wall of the top clamping column inside the end sealing cover. The size of the sealing plate is larger than the size of the rectangular notch on the paperclip partition. A plugging sleeve is fixed on the top of the end sealing cover. The top clamping column is arranged inside the plugging sleeve. A bottom clamping plate that can move vertically is provided below the paperclip partition; Horizontal moving components are provided at both the upper and lower ends of the paperclip partition. Both horizontal moving components include a telescopic rod one fixed on the side wall of the detection box. The telescopic ends of the two telescopic rods one are respectively connected to one of the top sealing clamping plates and one of the bottom sealing clamping plates. Rack two is connected to both one of the top sealing clamping plates and one of the bottom sealing clamping plates. Gears are rotatably connected to both the upper and lower ends of the paperclip partition. Rack one is connected to both the other top sealing clamping plate and the other bottom sealing clamping plate. The rack one and rack two connected to the two top sealing clamping plates are simultaneously engaged with the gear at the upper end of the paperclip partition. The rack one and rack two connected to the two bottom sealing clamping plates are simultaneously engaged with the gear at the lower end of the paperclip partition; Two guiding grooves are provided at one end of the bottom clamping plate. V-shaped positioning blocks are slidably connected in both guiding grooves. Compression springs are connected to both V-shaped positioning blocks. The ends of the two compression springs are respectively fixed in the two guiding grooves. Push shafts are fixed at the lower ends of both bottom sealing clamping plates. Two avoiding notches for avoiding the movement of the push shafts are symmetrically provided at both ends of the bottom clamping plate. Transmission rods are connected to both V-shaped positioning blocks. The push shaft cooperates with the transmission rod.

2. The air filter performance detection device according to claim 1, characterized in that The detection module includes sensors for detecting the particle concentration installed in both the dust gas inlet pipe and the exhaust pipe, and a differential pressure sensor for detecting the differential pressure of the test air filter connected to the dust gas inlet pipe and the exhaust pipe.

3. The air filter performance detection device according to claim 1, characterized in that, A vertical moving component for driving the bottom clamping plate to move vertically is provided at the bottom of the detection box. The vertical moving component includes a concave moving frame slidably connected vertically at the bottom of the detection box, and a telescopic rod three fixed at the bottom of the detection box. The telescopic end of the telescopic rod three is connected to the concave moving frame. The bottom clamping plate is rotatably connected to the upper part of the concave moving frame. A limiting bolt is threadedly connected to the side wall of the concave moving frame. The limiting bolt contacts the side wall of the bottom clamping plate.

4. The air filter performance detection device according to claim 3, wherein A soft circular sealing pad is installed at one end of the bottom clamping plate. Annular protrusions of different sizes are sequentially arranged from the center to the outside on the circular sealing pad. A plurality of supporting rib plates are evenly installed at the other end of the bottom clamping plate.

5. The air filter performance detection device according to claim 1, characterized in that, An installation frame is fixed to the top of the end sealing cover, the top clamping column is slidably connected to the installation frame, a second telescopic rod is fixed to the top of the installation frame, and the telescopic end of the second telescopic rod is connected to the top of the top clamping column.

6. The air filter performance detection device according to claim 1, characterized in that, A guiding shaft is fixed to the side wall of the end sealing cover, the guiding shaft is vertically slidably connected to the side wall of the detection box, a fourth telescopic rod is fixed to the side wall of the detection box, and the telescopic end of the fourth telescopic rod is connected to the side wall of the end sealing cover.

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