Venturi type paint mist filter box

Abstract

The utility model discloses a Venturi type paint mist filter box, and relates to the field of industrial coating technology, the Venturi type paint mist filter box comprises a paper box body and a capture column, the periphery of the paper box body is provided with a first sealing strip and two second sealing strips, the two ends of the first sealing strip are provided with T-shaped sliding grooves, one side of each T-shaped sliding groove is provided with a quick release mechanism, and the other side of each T-shaped sliding groove is provided with a second sealing strip; a linear stretching mechanism is arranged on one side of the upper portion of the T-shaped sliding groove, one end of a pull rope in the linear stretching mechanism is fixedly connected with a film roll, the film roll is sleeved with a semicircular cover, T-shaped sliding rods are symmetrically arranged at the two ends of the two second sealing strips, and movable rods are rotationally connected to the middles of the sides, away from the second sealing strips, of the T-shaped sliding rods. The side, away from the T-shaped sliding rod, of the movable rod is rotationally connected with a limiting column clamped to the first semicircular clamping groove. According to the paint mist collecting device, the paint mist collecting efficiency is improved, the containing efficiency is improved, space utilization is improved, and the problem that during replacement, secondary pollution possibly occurs, and consequently breathing health of people is damaged is solved.

Description

Technical Field

[0001] The present application relates to the field of industrial coating technology, in particular to a Venturi-type paint mist filter box. Background Art

[0002] A spray booth is a coating room designed specifically for spraying liquid paint. It is a key piece of equipment in an industrial paint shop. A large amount of paint mist is generated in the booth. This paint mist contains harmful substances such as sticky substances and dust particles, and cannot be discharged directly. It must be purified.

[0003] However, the existing paint mist filtering device is still lacking in terms of its ability to accommodate paint mist, the filtering efficiency of the filter unit, and the capture efficiency. This will lead to the need for frequent replacement, increasing the cost of use. In addition, when the existing paint room is changed from wet to dry, due to limited space, the paper filter box needs to be installed on a fixed bracket, which may have some shortcomings in the utilization of space. In addition, when the filter box is replaced, the paint mist attached to its surface may fall off and cause secondary pollution, which will harm the respiratory health of the replacement personnel. Utility Model Content

[0004] In order to improve the capture efficiency and containment efficiency of paint mist, improve space utilization, and solve the problem of secondary pollution that may occur during replacement and cause damage to people's respiratory health, the present application provides a Venturi-type paint mist filter box.

[0005] The Venturi paint mist filter box provided in this application adopts the following technical solutions:

[0006] A Venturi-type paint mist filter box, comprising a paper box body and a capture column, characterized in that: two first sealing strips and two second sealing strips are symmetrically arranged around one end of the paper box body, two first sealing strips are symmetrically arranged at both ends with T-shaped slides, and a quick-release mechanism is provided on the side of the T-shaped slide away from the first sealing strip;

[0007] The quick release mechanism includes a semicircular guide block fixedly mounted on the inner cavity side wall of the end of the T-shaped slide away from the first sealing strip, a special-shaped limit block fixedly connected to the side wall of the T-shaped slide is provided on one side of the semicircular guide block, and a first semicircular clamping groove is formed on the side of the special-shaped limit block;

[0008] A linear stretching mechanism is provided on the upper part of the T-shaped slide, and the linear stretching mechanism includes an embedded notch opened at the lower part of one side of the paper box body and located at the upper end of the T-shaped slide, and a telescopic L-shaped slider movably penetrated and provided in the inner cavity of the embedded notch, and an open slide is opened on the upper surface of one side of the paper box body, and a pull rope fixed to the telescopic L-shaped slider is slidably provided inside the open slide, and the other end of the pull rope is fixed to the film roll, and the outer surface of the film roll is provided with a semicircular cover fixed to the paper box body;

[0009] T-shaped sliding rods are symmetrically provided at both ends of the two second sealing strips. A movable rod is connected to the middle part of the T-shaped sliding rod away from the second sealing strip. A limiting column is connected to the side of the movable rod away from the T-shaped sliding rod that is clamped with the first semicircular slot.

[0010] By adopting the above technical solution, the first sealing strip and the second sealing strip abut each other to achieve a better sealing effect, so that there is no risk of secondary contamination, and the quick-release mechanism and the linear stretching mechanism cooperate with each other to achieve the rapid installation of the paper box and rapid replacement after absorbing enough paint, saving time, and using a film to cover the air inlet and outlet of the paper box during replacement, so that the absorbed paint will not fall off or dirty the clothes of the person changing it during transportation.

[0011] Preferably, the quick release mechanism further comprises a hinge fixedly mounted on one side of the lower portion of the first semicircular slot, and a triangular guide limit block abutting against the semicircular guide block is fixedly mounted on the side of the hinge away from the first semicircular slot.

[0012] By adopting the above technical solution, the hinge can enable the triangular guide limit block to be flipped and the triangular guide limit block to be positioned so that it does not move with the limit column.

[0013] Preferably, a spring fixedly connected to the inner wall of the T-shaped slide is fixedly provided on the side of the semicircular guide block away from the paper box body, and an abutment plate slidingly arranged with the inner wall of the T-shaped slide is fixedly provided on one side of the spring.

[0014] By adopting the above technical solution, the abutment plate and the spring cooperate with each other to play an auxiliary role in the engagement between the limiting column and the first semicircular slot.

[0015] Preferably, a limiting handle is fixedly provided on the upper portion of the surface of the special-shaped limiting block away from the first semicircular slot and is engaged with the lower end of the telescopic L-shaped sliding block.

[0016] By adopting the above technical solution, the limit handle can help prevent the telescopic L-shaped slider from moving under normal circumstances, thereby keeping the entire linear pull rope mechanism in a static state, and preventing the film roll from being pulled out and wasted due to misoperation.

[0017] Preferably, the linear stretching mechanism further comprises a through slot penetrating the upper portion of the T-shaped slide slot, and a limiting slot for engaging with the telescopic L-shaped sliding block is provided on a side of the through slot away from the semicircular guide block.

[0018] By adopting the above technical solution, the through groove can help the telescopic L-shaped slider slide more smoothly in the T-shaped slide groove, and the telescopic L-shaped slider has a spring inside. When the telescopic L-shaped slider moves to the limit groove, the side close to the limit groove will be pushed out and engaged with the limit groove for limit.

[0019] Preferably, a second semicircular groove for engaging with the limiting column is provided on a side of the lower portion of the telescopic L-shaped sliding block away from the first sealing strip.

[0020] By adopting the above technical solution, the second semi-cylindrical slot cooperates with the limit column, thereby driving the telescopic L-shaped slider and the pull rope to move, thereby enabling the entire linear stretching mechanism to operate.

[0021] Preferably, the inner wall of the embedded slot away from the telescopic L-shaped slider is connected to a single pulley that is slidably connected to the pull rope.

[0022] By adopting the above technical solution, the single wheel can make the pull rope move in a circular motion, so that the pull rope can be fixedly connected to the telescopic L-shaped slider.

[0023] Preferably, a rope clip movably inserted through the draw rope is fixedly provided on one side of the first sealing strip at the lower portion of the paper box body.

[0024] By adopting the above technical solution, the rope threading clamp can change the movement trajectory of the pull rope, so that the pull rope can flexibly change the angle and reduce the wear on the paper box.

[0025] In summary, this application includes at least one of the following beneficial technical effects:

[0026] 1. Use the T-shaped slide bar to push the movable rod and the limit column in the T-shaped slide groove, and through the mutual cooperation between the semicircular guide block, the special-shaped limit block and the inner cavity of the T-shaped slide groove, the paper box can be quickly assembled and disassembled, eliminating the traditional iron frame and saving more space;

[0027] 2. With the help of the retractable L-shaped slider to drive the pull rope to move, and through the cooperation between the single wheel, the rope clamp and the pull rope, the film roll in the semi-circular cover can be pulled out and the air vents in front and behind the paper box can be covered to prevent the adsorbed paint from falling or causing harm to the human body; BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic front view of the entire application;

[0029] Figure 2 It is a schematic diagram of the overall left side of this application;

[0030] Figure 3 It is a schematic diagram of the overall right side view of this application;

[0031] Figure 4 This is a schematic diagram of the semi-circular cover and film roll at A of this application;

[0032] Figure 5 This is a schematic diagram of the structure of the T-shaped chute opening at position C of this application;

[0033] Figure 6 This is a schematic diagram of the position of the limit slot of this application;

[0034] Figure 7 Schematic diagram of the through groove and embedded notch at B of this application;

[0035] Figure 8 This is an enlarged view of the quick release mechanism and the linear stretching mechanism of the present application;

[0036] Figure 9 This is a schematic diagram of the quick-release mechanism of this application;

[0037] Figure 10 This is a diagram showing the connection between the hinge and the triangular guide limit block of this application.

[0038] Reference numerals: 1, paper box; 2, capture column; 3, first sealing strip; 4, T-shaped slide;

[0039] 5. Quick release mechanism; 51. Semicircular guide block; 52. Special-shaped limit block; 53. First semicircular slot; 54. Abutment plate; 55. Spring; 56. Hinge; 57. Triangular guide limit block; 58. Limit handle;

[0040] 6. Linear stretching mechanism; 61. Telescopic L-shaped slider; 62. Open slide; 63. Pull rope; 64. Single pulley; 65. Second semicircular slot; 66. Rope clip; 67. Through slot; 68. Embedded notch;

[0041] 7. Film roll; 8. Semi-circular cover; 9. Second sealing strip; 10. T-shaped sliding bar; 11. Movable rod; 12. Limiting column; 13. Limiting groove. DETAILED DESCRIPTION

[0042] The following is combined with Figure 1 - Figure 10 This application is described in further detail.

[0043] The embodiment of the present application discloses a Venturi-type paint mist filter box.

[0044] Reference Figure 1 、 Figure 2 、 Figure 3The Venturi-type paint mist filter box includes a paper box body 1 and a capture column 2 for capturing paint mist designed according to the Venturi principle, and two groups of staggered sealing structures consisting of a first sealing strip 3 and two second sealing strips 9 are symmetrically arranged on the four sides on one side of the air inlet of the paper box body 1. The two first sealing strips 3 have the same structure, and two T-shaped slide grooves 4 with the same structure and installation method are symmetrically arranged at both ends. The two second sealing strips 9 have the same structure, and two T-shaped slide rods 10 with the same structure and installation method are symmetrically arranged at both ends. The middle surface of the T-shaped slide rod 10 away from the second sealing strip 9 is fixedly connected to the side of the movable rod 11, and the movable rod 11 is rotatably provided with a limiting column 12 on the side away from the T-shaped slide rod 10, and the limiting column 12 can be mutually engaged with the first semicircular slot 53 for limiting position.

[0045] It should be noted that the side edges of the paper box body 1 are symmetrically arranged as the first sealing strip 3 and the second sealing strip 9, and the position of the first sealing strip 3 is relatively backward compared to the second sealing strip 9. The first sealing strip 3 and the second sealing strip 9 have the same structure and can be superimposed on each other. When superimposed on each other, the first sealing strip 3 is located at the rear of the second sealing strip 9, and in the above-mentioned device, the paper box body 1 and the capture column 2 are both existing technologies, and their structural principles will not be elaborated here.

[0046] On the basis of inertial impact and traditional filtration, the Venturi channel between the capture columns 2 is used to accelerate the air. Under the action of the Bernoulli equation, the flow section generates adsorption force, which further improves the capture efficiency of the paint mist. At the same time, the paint mist holding capacity is also greatly improved. The single box holding capacity can reach 15-30 kilograms. The use of the paper box 1 can achieve the advantages of flexible application, convenient replacement and greater environmental protection, and the first sealing strip 3 and the second sealing strip 9 are arranged on the outside to provide it with good sealing performance and stability as a whole.

[0047] Reference Figure 8 、 Figure 9 、 Figure 10, each T-shaped slide 4 is provided with a quick release mechanism 5 at one end, and is arranged away from the first sealing strip 3, and the quick release mechanism 5 includes a semicircular guide block 51 fixedly arranged on the inner cavity side wall of the T-shaped slide 4 away from the first sealing strip 3, and the semicircular guide block 51 is provided with a special-shaped limit block 52 on the side away from the inner wall of the T-shaped slide 4, and the special-shaped limit block 52 is fixedly connected to the side wall of one side of the T-shaped slide 4, and the special-shaped limit block 52 is located on one side of the semicircular guide block 51 and is provided with a first semicircular groove 53 that can be used to clamp and limit the limit column 12, and a hinge 56 is fixedly connected to the lower surface of the first semicircular groove 53 away from the special-shaped limit block 52 by screws, and the hinge 56 is fixedly connected to the triangular guide limit block 57 on the side away from the first semicircular groove 53 by screws, and the triangular guide limit block 57 is away from The surface of one side of the hinge 56 is in contact with and abuts the arc surface of the semicircular guide block 51, and a spring 55 is laterally arranged on the side of the semicircular guide block 51 away from the paper box body 1, and the end of the spring 55 away from the first sealing strip 3 is fixedly connected to the side wall of the inner cavity of the T-shaped slide 4, and the spring 55 is located at one end of the first sealing strip 3 and is fixedly connected to the abutment plate 54, and the abutment plate 54 is slidably arranged in the inner wall of the T-shaped slide 4 away from the semicircular guide block 51, and the surface of the abutment plate 54 away from the spring 55 is in contact with the surface of the lower part of the T-shaped slide bar 10 at one end of the movable rod 11, and the upper surface of the side of the special-shaped limit block 52 away from the first semicircular slot 53 is fixedly connected to the surface of the side of the limit handle 58, and the limit handle 58 is clamped and limited to the lower end of the telescopic L-shaped slider 61 on the side away from the special-shaped limit block 52.

[0048] The cooperation between the semicircular guide block 51, the special-shaped limit block 52 and the upper and lower side walls of the inner cavity of the T-shaped slide 4 can enable the limit column 12 to slide through the lower part of the T-shaped slide 4 to the lower arc surface of the semicircular guide block 51, and lift the triangular guide limit block 57 through the lower arc surface of the semicircular guide block 51, and then fall into the first semicircular groove 53 for positioning. At the same time, when the limit column 12 is pushed forward in the first semicircular groove 53, it will be blocked by the triangular guide limit block 57 and cannot return to the original path. It can only slide out from the upper part of the first semicircular groove 53 and through the upper arc surface of the semicircular guide block 51, and then slide out through the channel formed by the upper part of the semicircular guide block 51 and the upper part of the inner cavity of the T-shaped slide 4 and slide into the second semicircular groove 65.

[0049] When the limiting column 12 pushes the triangular guide limiting block 57 out, the hinge 56 can help the triangular guide limiting block 57 to flip over, and assist the triangular guide limiting block 57 to prevent the limiting column 12 from pushing in the reverse direction and return to the original path. When the T-shaped slide bar 10 pushes the movable rod 11 and the limiting column 12 to slide in the T-shaped slide groove 4, and the limiting column 12 contacts the semicircular guide block 51 and the special-shaped limiting block 52 to limit the position, the T-shaped slide bar 10 is located at the movable rod 11. 1 abuts against the abutment plate 54 and pushes the abutment plate 54, thereby squeezing the spring 55. When the limiting post 12 is engaged with the first semicircular slot 53, the spring 55 pushes the abutment plate 54, thereby pushing the T-shaped slide bar 10, so that there is a pulling force between the limiting post 12 and the first semicircular slot 53 to maintain the engaged and limited state, and provides a short forward distance for the T-shaped slide bar 10 to facilitate the disengagement of the limiting post 12 from the first semicircular slot 53 when disengaging.

[0050] Reference Figure 4 、 Figure 5 、 Figure 6 、 Figure 7A linear stretching mechanism 6 is provided on the upper part of the T-shaped slide 4 at the lower part of the first sealing strip 3 provided on the side of the paper box body 1, and the linear stretching mechanism 6 includes an embedded groove 68 opened at the lower part of one side of the paper box body 1, and the embedded groove 68 is opened at the upper end side of the T-shaped slide 4, and a telescopic L-shaped slider 61 is slidably provided in the inner cavity of the embedded groove 68, and the telescopic L-shaped slider 61 is movably penetrated by the lower part of the side away from the embedded groove 68 and the upper surface of the T-shaped slide 4, and a through groove 67 is movably penetrated on the upper part of the T-shaped slide 4, and the inner surface of the through groove 67 and the telescopic L-shaped slider 61 movably penetrate the T-shaped slide. 4 is slidably connected to the outer surface of one side of the through groove 67, and a limiting groove 13 is provided on the surface of one side away from the semicircular guide block 51 and away from the T-shaped slide 4, and the diameter of the limiting groove 13 is consistent with the size of the lower part of the telescopic L-shaped slider 61 passing through the T-shaped slide 4, and can be clamped with the telescopic L-shaped slider 61, and a second semicircular clamping groove 65 is provided on the side of the telescopic L-shaped slider 61 away from the first sealing strip 3, and the diameter of the second semicircular clamping groove 65 is greater than the diameter of the limiting column 12, ensuring that it can be clamped and limited with the limiting column 12, and the upper end of the telescopic L-shaped slider 61 is located on the upper surface of one side of the paper box body 1. The open slide 62 can be slidably connected to the pull rope 63, and the surface of the open slide 62 is set to a smooth surface, and its internal diameter is larger than the diameter of the pull rope 63 to ensure that it can be separated from the pull rope 63, and the pull rope 63 passes through the telescopic L-shaped slider 61 and is rotatably connected to the single pulley 64 at one end, and the pull rope 63 passes through the outer annular groove of the single pulley 64 and is fixedly connected to the middle of the surface of the telescopic L-shaped slider 61 away from the first sealing strip 3, and the single pulley 64 is rotatably set on the inner wall of the side of the embedded notch 68 away from the telescopic L-shaped slider 61, and when the telescopic L-shaped slider 61 is located at the lower part of the surface of one side of the single pulley 64 and is connected to another linear pulley The pull rope 63 in the extension mechanism 6 is fixedly connected, and the paper box body 1 is located at the lower part of one side of the first sealing strip 3 and is fixed with a rope clip 66, and the rope clip 66 and the embedded slot 68 are on the same axis, and the middle part of the rope clip 66 is movably arranged to penetrate the pull rope 63, and the rope clip 66 can provide a fold angle for the pull rope 63, so that the end of the pull rope 63 away from the telescopic L-shaped slider 61 can be fixedly connected to the lower end of the film roll 7, and the film roll 7 is rotatably set in the middle of the semicircular cover 8 sleeved on its outside, and the surface of the semicircular cover 8 away from the film roll 7 is fixedly connected to the surface of the paper box body 1 on the side of the first sealing strip 3.

[0051] It should be noted that two film rolls 7 and two semicircular covers 8 are provided, which are respectively arranged on the upper surface of the paper box body 1 on the side of the first sealing strip 3 and the side away from the first sealing strip 3, so that the film roll 7 can cover the openings in front and behind the paper box body 1 after being pulled out, and the other end of the pull rope 63 fixed to the lower part of the film roll 7 at the rear of the paper box body 1 is fixedly connected to the telescopic L-shaped slider 61. During the forward movement of the telescopic L-shaped slider 61, the film roll 7 can also be pulled out from the semicircular cover 8, which can save materials.

[0052] When the limit post 12 is disengaged from the first semicircular slot 53, the limit post 12 enters the interior of the second semicircular slot 65 under the guidance of the upper part of the special-shaped limit block 52 and the upper part of the inner cavity of the T-shaped slide 4, and drives the telescopic L-shaped slider 61 to separate from the limit handle 58, and then moves in the through groove 67 opened at the upper part of the T-shaped slide 4. When the telescopic L-shaped slider 61 moves, the pull rope 63 can be pulled to move on the outer ring surface of the single pulley 64, and drive the single pulley 64 to rotate, thereby causing the pull rope 63 and the film roll 7 fixed end to move downward, and drive the film roll 7 to be pulled out of the semicircular cover 8 to cover the air inlet and exhaust port of the paper box 1, thereby reducing the adsorbed paint falling or sticking to the staff during the disassembly process, and the rope clip 66 can provide a ninety-degree angle for the pull rope 63, and the rope clip 66 has a simple structure, and the effect achieved is better.

[0053] The implementation principle of the Venturi paint mist filter box of the embodiment of the present application is as follows: when assembling multiple paper boxes 1, align the T-shaped slide bar 10 on the side of the second sealing strip 9 of one paper box 1 with the T-shaped slide groove 4 on the side of the first sealing strip 3 of another paper box 1, then align the movable rod 11 and the limit column 12 together and insert them, and finally push the entire paper box 1 forward until the T-shaped slide bar 10 pushes the limit column 12 through the semicircular guide block 51 and the special-shaped limit block 52 and the channel formed by the lower surface of the inner cavity of the T-shaped slide 4, and then the hinge 56 is pushed up. At this time, the T-shaped slide bar 10 will push the abutment plate 54 to squeeze the spring 55 until the limiting column 12 is engaged with the first semicircular groove 53. At this time, the staff can loosen the paper box 1 and make the spring 55 push the abutment plate 54 and the T-shaped slide bar 10 outward, so that the limiting column 12 and the first semicircular groove 53 remain in the engaged and limited state, and then assemble the remaining paper box 1 according to the above steps.

[0054] When replacement is needed, it is only necessary to push the paper box 1 inward so that the limiting column 12 disengages from the first semicircular slot 53 along the upper channel composed of the semicircular guide block 51, the special-shaped limiting block 52 and the T-shaped slide 4, and then falls into the second semicircular slot 65. Then, pull the paper box 1 so that the limiting column 12 pulls the telescopic L-shaped slider 61 out of the limiting handle 58, and through the cooperation between the pull rope 63, the single pulley 64 and the rope clip 66, pull the film roll 7 out of the semicircular cover 8 until the telescopic L-shaped slider 61 is stuck in the limiting groove 13, and then push the paper box 1 forward a short distance to separate the telescopic L-shaped slider 61 from the limiting groove 13, and finally pull out the entire paper box 1 for replacement.

[0055] The above are merely optional embodiments of the present disclosure and are not intended to limit the present disclosure. Those skilled in the art will readily appreciate that the present disclosure may be modified and varied in various ways. Any modifications, equivalent substitutions, improvements, and the like made within the spirit and principles of the present disclosure shall be included within the scope of protection of the present disclosure.

Claims

1. A Venturi-type paint mist filter box, comprising a paper box body (1) and a capture column (2), characterized in that: Two first sealing strips (3) and two second sealing strips (9) are symmetrically arranged around one end of the paper box body (1); T-shaped sliding grooves (4) are symmetrically arranged at both ends of the two first sealing strips (3); and a quick-release mechanism (5) is arranged on the side of the T-shaped sliding groove (4) away from the first sealing strip (3); The quick-release mechanism (5) comprises a semicircular guide block (51) fixedly mounted on the inner cavity side wall of one end of the T-shaped chute (4) away from the first sealing strip (3); a special-shaped limit block (52) fixedly connected to the side wall of the T-shaped chute (4) is provided on one side of the semicircular guide block (51); and a first semicircular clamping groove (53) is provided on the side of the special-shaped limit block (52) located on the semicircular guide block (51); The upper portion of the T-shaped chute (4) is provided with a linear stretching mechanism (6), the linear stretching mechanism (6) comprises an embedded slot (68) provided at the lower portion of one side of the paper box (1) and located at the upper end of the T-shaped chute (4), the inner cavity of the embedded slot (68) is provided with a telescopic L-shaped slider (61) movably provided with the upper portion of the T-shaped chute (4), the telescopic L-shaped slider (61) is provided with an open slot (62) provided at the upper portion of the surface of one side of the paper box (1), the open slot (62) is provided with a pull rope (63) fixed to the telescopic L-shaped slider (61) in a sliding manner, the other end of the pull rope (63) is fixed to the film roll (7), and the outer portion of the film roll (7) is provided with a semicircular cover (8) fixed to the paper box (1); Both ends of the two second sealing strips (9) are symmetrically provided with T-shaped sliding rods (10), the middle part of the T-shaped sliding rod (10) away from the second sealing strip (9) is connected to a movable rod (11), and the side of the movable rod (11) away from the T-shaped sliding rod (10) is connected to a limiting column (12) that is clamped with the first semicircular clamping groove (53).

2. The Venturi-type paint mist filter box according to claim 1, characterized in that: The quick-release mechanism (5) further comprises a hinge (56) fixedly mounted on one side of the lower portion of the first semicircular slot (53); a triangular guide limit block (57) abutting against the semicircular guide block (51) is fixedly mounted on the side of the hinge (56) away from the first semicircular slot (53).

3. The Venturi-type paint mist filter box according to claim 1, characterized in that: A spring (55) fixedly connected to the inner wall of the T-shaped chute (4) is fixedly provided on one side of the semicircular guide block (51) away from the paper box body (1); and an abutment plate (54) slidingly arranged on the inner wall of the T-shaped chute (4) is fixedly provided on one side of the spring (55).

4. The Venturi-type paint mist filter box according to claim 1, characterized in that: A limiting handle (58) is fixedly provided on the upper portion of the surface of the special-shaped limiting block (52) away from the first semicircular slot (53) and is engaged with the lower end of the telescopic L-shaped sliding block (61).

5. The Venturi-type paint mist filter box according to claim 1, characterized in that: The linear stretching mechanism (6) further comprises a through slot (67) extending through the upper portion of the T-shaped slideway (4); a limiting slot (13) for engaging with the telescopic L-shaped slide block (61) is provided on a side of the through slot (67) away from the semicircular guide block (51).

6. The Venturi-type paint mist filter box according to claim 1, characterized in that: A second semicircular slot (65) for engaging with the limiting column (12) is provided on the lower part of the telescopic L-shaped sliding block (61) on a side away from the first sealing strip (3).

7. The Venturi-type paint mist filter box according to claim 6, characterized in that: The inner wall of the embedded notch (68) away from the telescopic L-shaped slider (61) is connected to a single pulley (64) that is slidably connected to the pull rope (63).

8. The Venturi-type paint mist filter box according to claim 1, characterized in that: A rope clip (66) is fixedly provided on the lower part of the paper box body (1) on one side of the first sealing strip (3) and is movably connected to the draw rope (63).

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