Device for detecting filtering efficiency of filter material

Abstract

The utility model discloses a filter material filtering efficiency detection device, and particularly relates to the technical field of filter material detection. The direction-changing spray head is rotationally arranged at the bottom of the diffusion homogenization tank and is used for spraying high-pressure nitrogen; an impeller for driving the direction-changing spray head to move is arranged on the direction-changing spray head; the first air inlet cavity and the second air inlet cavity are symmetrically arranged and used for supplying air, and air inlet holes and air outlet holes facing the impeller are formed in the first air inlet cavity and the second air inlet cavity; and the movable air inlet is slidably arranged. According to the detection device for the filtering efficiency of the filter material, through the arrangement of the impeller and the movable air inlet, reversing of the direction-changing spray head can be achieved through the pressure of high-pressure nitrogen, other acting force is not needed, gas enters different air inlet cavities by sliding the movable air inlet, and then steering of the direction-changing spray head is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of filter material detection, and particularly relates to a filter material filtration efficiency detection device. Background Art

[0002] A filter material filtration efficiency detection device is a device used to test the filtration efficiency of filter materials (such as filter paper, filter cloth, etc.) for particulate matter under specific conditions.

[0003] Combined with the publication number CN114088575A, the publication date is February 25, 2022, which discloses a filter material filtration efficiency detection device and its method, including an aerosol generation device, a control system and a detection device. The servo motor is used to drive the screw to convey nano-particles, realizing the quantitative continuous output of aerosol particles.

[0004] The above technology blows the aerosol through a nozzle to make it spread evenly, but it is more troublesome to realize the nozzle turning by using a motor and multiple gears in cooperation. Content of the Utility Model

[0005] The purpose of the utility model is to provide a filter material filtration efficiency detection device to solve the above problems.

[0006] To achieve the above purpose, the utility model provides the following technical solution: a filter material filtration efficiency detection device, including a diffusion and homogenization tank, including;

[0007] A variable-direction nozzle rotatably arranged at the bottom of the diffusion and homogenization tank and used for spraying high-pressure nitrogen, on which are provided:

[0008] An impeller used to drive the variable-direction nozzle to move;

[0009] A first air inlet cavity and a second air inlet cavity symmetrically arranged and both used for supplying air. Air inlet holes and air outlet holes facing the impeller are opened in both the first air inlet cavity and the second air inlet cavity;

[0010] A movable air inlet arranged slidably, which is driven to switch between connecting the first air inlet cavity and the second air inlet cavity.

[0011] Preferably, it further includes a driving mechanism, which includes a driving gear fixedly arranged with the impeller;

[0012] A driven gear rotatably arranged at the bottom of the diffusion and homogenization tank, which meshes with the driving gear for transmission;

[0013] A swing rod rotatably arranged at both ends on the driven gear and the variable-direction nozzle respectively

[0014] Preferably, it further includes a sliding rail fixedly arranged at the bottom of the diffusion and homogenization tank, which is used for the variable-direction nozzle to slide.

[0015] Preferably, baffles for pushing against the movable air inlet are provided at both ends of the sliding rail.

[0016] Preferably, an elastic sliding plate is provided on the movable air inlet, and a sliding member for pushing against the elastic sliding plate is axially slidably provided on the deflecting nozzle.

[0017] Preferably, ratchets are rotatably provided in the air inlet holes of the first air inlet chamber and the second air inlet chamber, and a plug rod that can be tangent to the tooth grain surface of the ratchet is provided on the sliding member. When the plug rod is slidably connected to the tooth grain surface, the sliding member is pushed to move.

[0018] In the above technical solution, a filter material filtration efficiency detection device provided by the present utility model has the following beneficial effects: Through the settings of the impeller and the movable air inlet, the high-pressure nitrogen can realize the commutation of the deflecting nozzle by its own pressure without the need for other acting forces. By sliding the movable air inlet, the gas enters different air inlet chambers, and then the turning of the deflecting nozzle is realized. Description of the Drawings

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0020] Figure 1 Internal sectional view of the diffusion homogenization tank provided by the embodiment of the present utility model;

[0021] Figure 2 Schematic diagram of the driving mechanism provided by the embodiment of the present utility model;

[0022] Figure 3 Internal sectional view of the deflecting nozzle provided by the embodiment of the present utility model;

[0023] Figure 4 Schematic diagram of the position of the sliding rail and the baffle provided by the embodiment of the present utility model;

[0024] Figure 5 Schematic diagram of the structure of the movable air inlet and the sliding groove provided by the embodiment of the present utility model;

[0025] Figure 6 Schematic diagram of the position of the sliding member and the ratchet provided by the embodiment of the present utility model;

[0026] Figure 7 Provided by the embodiment of the present utility model Figure 6 Enlarged schematic view of A in

[0027] Description of the reference numerals:

[0028] 1. Diffusion homogenization tank; 2. Input pipe; 3. Direction-changing nozzle; 31. First air inlet chamber; 32. Second air inlet chamber; 34. Movable air inlet; 35. Elastic slide plate; 36. Sliding member; 37. Spring; 38. Plug rod; 39. Ratchet; 4. Driving gear; 5. Driven gear; 6. Swing rod; 7. Impeller; 8. Sliding rail; 81. Baffle; 82. Protrusion. Detailed implementation mode

[0029] In order to enable those skilled in the art to better understand the technical solution of the present utility model, the present utility model will be further introduced in detail below in conjunction with the accompanying drawings.

[0030] As Figures 1-7 shown, a filter material filtration efficiency detection device includes a diffusion homogenization tank 1, including;

[0031] A direction-changing nozzle 3 rotatably arranged at the bottom of the diffusion homogenization tank 1 and used for spraying high-pressure nitrogen, on which are provided:

[0032] A direction-changing nozzle 3 rotatably arranged at the bottom of the diffusion homogenization tank 1 and used for spraying high-pressure nitrogen, on which are provided:

[0033] An impeller 7 for driving the direction-changing nozzle 3 to move;

[0034] The first air inlet chamber 31 and the second air inlet chamber 32 which are symmetrically arranged and both used for supplying air. Air inlet holes and air outlet holes facing the impeller 7 are provided in both the first air inlet chamber 31 and the second air inlet chamber 32;

[0035] A slidably arranged movable air inlet 34, which is driven to switch between connecting the first air inlet chamber 31 and the second air inlet chamber 32.

[0036] Specifically, the movable air inlet 34 is connected to a high-pressure nitrogen pipeline, and the diffusion homogenization tank 1 is connected to a high-concentration aerosol channel. High-concentration aerosol particles are blown by the nitrogen sprayed in the direction-changing nozzle 3 and are evenly diffused in the diffusion homogenization tank 1. The above technologies are common technical knowledge for those skilled in the art and will not be elaborated here.

[0037] Further, by introducing high-pressure nitrogen gas into the movable air inlet 34, the nitrogen gas enters the first air inlet chamber 31 or the second air inlet chamber 32 after passing through the movable air inlet 34, and rushes towards the impeller 7 through the air outlet holes, driving the impeller 7 to rotate. The impeller 7 drives the deflecting nozzle 3 to rotate. Since the air outlet holes of the first air inlet chamber 31 and the second air inlet chamber 32 are respectively oriented towards the two tangents on both sides of the impeller 7, and the acting directions of the two tangents on the impeller 7 are opposite, the rotation directions of the gas in different air inlet chambers on the impeller 7 are opposite. Therefore, the rotation directions of the impeller 7 driving the deflecting nozzle 3 are different. The reversing of the deflecting nozzle 3 can be achieved by the pressure of the high-pressure nitrogen gas itself without the need for other acting forces. By sliding the movable air inlet 34, the gas enters different air inlet chambers, and then the steering of the deflecting nozzle 3 is realized;

[0038] The above-mentioned impeller 7 can drive the deflecting nozzle 3 to move by being fixedly connected with the deflecting nozzle 3, or by fixedly arranging a pin rod on the impeller 7 and fixedly arranging a slide rail on the diffusion homogenization tank 1 that is slidably matched with the deflecting nozzle 3. The pin rod is slidably matched with the slide rail, and during the rotation of the impeller 7, the pin rod is driven to slide in the slide rail, converting the circumferential stroke of the impeller 7 into a reciprocating slide along the slide rail. Or other driving methods well-known to those skilled in the art can also be used.

[0039] In the above technology, through the settings of the impeller 7 and the movable air inlet 34, the reversing of the deflecting nozzle 3 can be achieved by the pressure of the high-pressure nitrogen gas itself without the need for other acting forces. By sliding the movable air inlet 34, the gas enters different air inlet chambers, and then the steering of the deflecting nozzle 3 is realized.

[0040] As a further embodiment provided by the present utility model, it further includes a driving mechanism, which includes a driving gear 4 fixedly arranged with the impeller 7;

[0041] A driven gear 5 rotatably arranged at the bottom of the diffusion homogenization tank 1, which is meshed and driven with the driving gear 4;

[0042] A swing rod 6 rotatably arranged at both ends on the driven gear 5 and the deflecting nozzle 3 respectively.

[0043] Specifically, when the impeller 7 rotates, it drives the driving gear 4 to rotate. The driving gear 4 drives the driven gear 5 to rotate through meshing transmission. During the rotation of the driven gear 5, the deflecting nozzle 3 is driven to swing through the swing rod 6. When the rotation direction of the impeller 7 changes, the rotation direction of the driven gear 5 changes, and the swing direction of the swing rod 6 driving the deflecting nozzle 3 changes, achieving the effect of reversing the deflecting nozzle 3.

[0044] As yet another embodiment further provided by the present utility model, baffles 81 for pushing against the movable air inlet 34 are provided at both ends of the sliding rail 8.

[0045] Specifically, the deflecting nozzle 3 is slidably arranged on the sliding rail 8, and a chute for the sliding of the movable air inlet 34 is arranged at the bottom of the deflecting nozzle 3. A plurality of bumps 82 are arranged on the sliding rail 8 to increase the friction force and achieve the effect of sliding damping. When the deflecting nozzle 3 swings close to both ends of the sliding rail 8, the movable air inlet 34 approaches the baffle 81 along with the deflecting nozzle 3, and the baffle 81 blocks the movable air inlet 34. When the deflecting nozzle 3 continues to rotate, the acting force direction of the baffle 81 on the movable air inlet 34 is opposite to the rotation direction of the deflecting nozzle 3. The baffle 81 pushes against the movable air inlet 34 to slide along the chute, and the movable air inlet 34 switches to communicate with another air inlet chamber. When the deflecting nozzle 3 reaches both ends of the sliding rail 8, the baffle 81 pushes against the movable air inlet 34 to slide and switch.

[0046] As another embodiment further provided by the present utility model, an elastic slide plate 35 is arranged on the movable air inlet 34, and a sliding member 36 for pushing against the elastic slide plate 35 is axially slidably arranged on the deflecting nozzle 3.

[0047] Specifically, when the movable air inlet 34 is pushed by the baffle 81 and slides and switches, the elastic slide plate 35 moves to the air inlet hole of another air inlet chamber, and the elastic slide plate 35 contacts and is tangent to the sliding member 36. The elastic slide plate 35 is subjected to the pressing force of the sliding member 36 and deforms. The elastic slide plate 35 extends downward and abuts against the sliding rail 8. At this time, the friction force between the elastic slide plate 35 and the sliding rail 8 is relatively large, so that the deflecting nozzle 3 stays at the current position. Since the sliding and switching process occurs when the deflecting nozzle 3 reaches both ends of the sliding rail 8, the deflecting nozzle 3 stays when swinging to both ends of the sliding rail 8. Compared with the conventional swinging spray, the spraying range of the conventional swinging spray is close to a fan shape on the vertical plane, so that the blowing height in the middle is relatively higher than that on both sides. Therefore, the aerosol also shows a fan-shaped distribution trend after being blown and is concentrated in the middle. However, the deflecting nozzle 3 stays at both ends, so that the time for the nozzle to reach both ends is longer. Therefore, the amount of aerosol blown is relatively increased, making the aerosol more uniform.

[0048] As another embodiment further provided by the present utility model, a ratchet wheel 39 is rotatably arranged in the air inlet holes of the first air inlet chamber 31 and the second air inlet chamber 32, and a plug rod 38 that can be tangent to the tooth grain surface of the ratchet wheel 39 is arranged on the sliding member 36. When the plug rod 38 is slidably connected to the tooth grain surface, the sliding member 36 is pushed to move.

[0049] Specifically, a spring 37 is provided on the sliding member 36. The movable air inlet 34 slides under the pushing of the baffle 81, switches to communicate with the air inlet hole of another air inlet chamber, and during the sliding process, the sliding member 36 presses the elastic slide plate 35 to deform. Subsequently, the gas in the air inlet hole pushes the ratchet wheel 39 to rotate. The teeth of the ratchet wheel 39 are wider at the top and narrower at the bottom, and are tangent to the inserted teeth on the insertion rod 38 when stationary. When rotating, the rotational force of the teeth generates a force on the inserted teeth and causes the inserted teeth to slide along the tooth surface. The inserted teeth are pushed and squeezed to intersect with the ratchet wheel 39, the spring 37 is stretched, and drives the sliding member 36 to slide axially. The sliding member 36 no longer presses the elastic slide plate 35, and the deformation potential energy of the elastic slide plate 35 is released and no longer presses the sliding rail 8. Subsequently, the sliding member 36 is restored by the elastic force of the spring 37 and slides radially in the reverse direction again. The sliding member 36 is blocked by the outer side of the elastic slide plate 35 and no longer presses the elastic slide plate 35 to extend downward, enabling the direction-changing nozzle 3 to continue sliding until the movable air inlet 34 switches again.

[0050] Working principle: Nitrogen gas enters the first intake chamber 31 or the second intake chamber 32 through the movable air inlet 34 and surges towards the impeller 7 through the air outlet holes, driving the impeller 7 to rotate. The impeller 7 drives the deflecting nozzle 3 to rotate. When the impeller 7 rotates, it drives the driving gear 4 to rotate. The driving gear 4 drives the driven gear 5 to rotate through meshing transmission. During the rotation of the driven gear 5, the deflecting nozzle 3 is driven to swing by the swing rod 6. When the deflecting nozzle 3 swings close to both ends of the sliding rail 8, the movable air inlet 34 approaches the baffle 81 along with the deflecting nozzle 3, and the baffle 81 blocks the movable air inlet 34. As the deflecting nozzle 3 continues to rotate, the acting force direction of the baffle 81 on the movable air inlet 34 is opposite to the rotation direction of the deflecting nozzle 3. The baffle 81 pushes against the movable air inlet 34 to slide along the chute, and the movable air inlet 34 switches to communicate with the other intake chamber. When the deflecting nozzle 3 reaches both ends of the sliding rail 8, the baffle 81 pushes against the movable air inlet 34 to slide and switch, so that the elastic slide plate 35 contacts and is tangent to the sliding member 36. The elastic slide plate 35 is subjected to the pressing force of the sliding member 36 and deforms. The elastic slide plate 35 extends downward and abuts against the sliding rail 8. At this time, the friction between the elastic slide plate 35 and the sliding rail 8 is relatively large, causing the deflecting nozzle 3 to stay in the current position. Subsequently, the gas in the air inlet hole pushes the ratchet wheel 39 to rotate. The teeth of the ratchet wheel 39 are wider at the top and narrower at the bottom. When it is stationary, it is tangent to the inserted teeth on the inserting rod 38. When rotating, the rotational force of the teeth generates an acting force on the inserted teeth and causes the inserted teeth to slide along the tooth surface. The inserted teeth are pushed to intersect with the ratchet wheel 39 and drive the sliding member 36 to slide axially. The sliding member 36 no longer presses against the elastic slide plate 35. The deformation potential energy of the elastic slide plate 35 is released and no longer presses against the sliding rail 8. Subsequently, the sliding member 36 is restored by the elastic acting force of the spring 37 and slides radially in the reverse direction again. The sliding member 36 is blocked by the outer side of the elastic slide plate 35 and no longer presses against the elastic slide plate 35 to extend downward, causing the deflecting nozzle 3 to continue to slide until the movable air inlet 34 switches again. The rotation direction of the impeller 7 changes, which causes the rotation direction of the driven gear 5 to change, and the swing rod 6 drives the swing direction of the deflecting nozzle 3 to change, achieving the effect of reversing the deflecting nozzle 3.

[0051] Only some exemplary embodiments of the present invention are described by way of illustration above. Undoubtedly, for those of ordinary skill in the art, without departing from the spirit and scope of the present invention, the described embodiments can be modified in various different ways. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the protection scope of the claims of the present invention.

Claims

1. A filter material filtration efficiency detection device, comprising a diffusion homogenization tank (1), characterized in that: include; A reversing nozzle (3) is rotatably arranged at the bottom of the diffusion and homogenization tank (1) and is used to spray high-pressure nitrogen, and is provided with: An impeller (7) for driving the reversing nozzle (3) to move; A first air inlet cavity (31) and a second air inlet cavity (32) are symmetrically arranged and both used for air supply, wherein the first air inlet cavity (31) and the second air inlet cavity (32) are both provided with an air inlet hole and an air outlet hole facing the impeller (7); A movable air inlet (34) is slidably arranged and driven to switch between communicating with the first air inlet cavity (31) and the second air inlet cavity (32).

2. A filter material filtration efficiency detection device according to claim 1, characterized in that: It also includes a driving mechanism, which includes a driving gear (4) fixedly arranged with the impeller (7); Rotating a driven gear (5) disposed at the bottom of the diffusion and homogenization tank (1) to mesh with the driving gear (4) for transmission; The two ends of the swing rod (6) are rotatably arranged on the driven gear (5) and the direction-changing spray head (3).

3. A filter material filtration efficiency detection device according to claim 1, characterized in that: It also includes a sliding rail (8) fixedly arranged at the bottom of the diffusion and homogenization tank (1), which is used for the changing direction spray head (3) to slide.

4. A filter material filtration efficiency detection device according to claim 3, characterized in that: Both ends of the sliding rail (8) are provided with baffles (81) for pushing against the movable air inlet (34).

5. A filter material filtration efficiency detection device according to claim 1, characterized in that: The movable air inlet (34) is provided with an elastic slide plate (35), and the direction-changing nozzle (3) is axially slidably provided with a sliding member (36) for pushing against the elastic slide plate (35).

6. A filter material filtration efficiency detection device according to claim 5, characterized in that: A ratchet (39) is rotatably arranged in the air inlet holes of the first air inlet chamber (31) and the second air inlet chamber (32), and an insertion rod (38) which can be tangent to the tooth grain surface of the ratchet (39) is arranged on the sliding member (36), and when the insertion rod (38) is slidably connected to the tooth grain surface, the sliding member (36) is pushed and moved.

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