Self-locking air filter element outlet plugging device

Abstract

The application discloses a self-locking air filter element outlet plugging device and belongs to the technical field of filtering devices. The device comprises a plugging plate combination device and a lock hook device. The plugging plate combination device comprises a plugging plate and more than one air inlet pipe. The lock hook device comprises a lock hook, a pressing handle, a movable column and a spring. The movable column is arranged on the plugging plate. The pressing handle drives the movable column to make reciprocating motion relative to the plugging plate. When the movable column makes reciprocating motion, the lock hook is pushed to rotate, so that the lock hook hooks or escapes from the internal support of the air filter element, thereby making the plugging plate plug or open the open end of the air filter element. The spring is arranged between the pressing handle and the plugging plate. The application switches the locking state and the unlocking state by pushing the pressing handle, thereby solving the convenient problem of plugging the outlet of the air filter element with the internal support arranged inside. Meanwhile, the plugging device is stably hooked on the internal support of the air filter element by the spring pre-tightening force, thereby effectively plugging the open end of the air filter element and guaranteeing the maintenance effect of the air filter element.

Description

Technical Field

[0001] This invention belongs to the field of filtration device technology, specifically relating to a self-locking air filter outlet sealing device. Background Technology

[0002] With the widespread use of internal combustion engines, the number of air filters used for intake air filtration is increasing. Air filters require maintenance after a period of use to reduce intake resistance and lower the operating costs of the internal combustion engine.

[0003] Current cleaning methods primarily involve maintaining air filters using air filter maintenance devices. These devices typically seal the filter outlet using a post-pressurization method. However, this sealing mechanism requires a post-pressurization unit to press the air filter firmly against the outlet sealing mechanism, making it inconvenient to operate.

[0004] Some air filters have internal supports to prevent them from sticking together during use and affecting their performance. For these types of air filters, a design can be developed that both seals the air filter outlet and provides a quick seal, making air filter maintenance more convenient and efficient. Summary of the Invention

[0005] In view of this, the present invention provides a self-locking air filter outlet sealing device, which solves the problem of convenient sealing of air filter outlets with internal supports by pushing and pressing the handle to switch between locked and unlocked states; at the same time, the spring preload allows the sealing device to stably hook the internal support of the air filter, thereby effectively sealing the opening end of the air filter and ensuring the maintenance effect of the air filter.

[0006] This invention is achieved through the following technical solution:

[0007] A self-locking air filter outlet sealing device includes: a sealing plate assembly and a locking hook assembly;

[0008] The sealing plate assembly includes: a sealing plate and one or more air inlet pipes;

[0009] The air intake pipe is installed on the sealing plate;

[0010] The locking mechanism includes: a locking hook, a downward-pressing handle, a moving column, and a spring;

[0011] The movable column is vertically installed on the sealing plate, with a downward handle at the top and a locking hook at the bottom;

[0012] The downward handle is used to drive the moving column, so that the moving column reciprocates relative to the sealing plate;

[0013] When the moving column reciprocates, it pushes the locking hook to rotate, causing the locking hook to hook onto or disengage from the internal support of the air filter element, thereby causing the sealing plate to seal or open the opening end of the air filter element;

[0014] A spring is positioned between the downward-pressing handle and the sealing plate, and its preload keeps the locking hook in a hooked state.

[0015] Furthermore, the locking hook device also includes: a stationary column and a guide rail;

[0016] The sealing plate has a central hole;

[0017] The guide rail has a cylindrical structure and is coaxially sleeved in the hole in the sealing plate, with the central hole serving as the axial rail of the guide rail.

[0018] The moving column is coaxially mounted inside the axial rail of the guide rail and reciprocates along the axial direction of the guide rail;

[0019] The stationary column is located on the lower end face of the sealing plate, and its axis is parallel to the axis of the moving column;

[0020] One end of the locking hook has a groove for hooking the internal support of the air filter element, and the other end of the locking hook is hinged to the bottom of the stationary column; the locking hook rotates around the hinge point with the stationary column as the moving column reciprocates; the locking body of the locking hook is hinged to the bottom of the moving column.

[0021] One end of the spring abuts against the guide rail, and the other end abuts against the downward-pressing handle.

[0022] Furthermore, the top of the moving column is provided with external threads;

[0023] The downward lifting handle is provided with a threaded hole, which engages with the external thread on the top of the moving column, thereby adjusting the preload of the spring.

[0024] Furthermore, the locking hook device also includes: a rotating handle;

[0025] The rotating handle is located on the upper part of the guide rail, providing support for the reciprocating motion of the handle when pressed down.

[0026] Furthermore, the downward-pressing handle has a U-shaped structure, including: a vertical part A and two horizontal parts A; one horizontal part A of the downward-pressing handle is threadedly connected to the top of the moving column;

[0027] The rotating handle has a U-shaped structure, including: a vertical part B and two horizontal parts B; one horizontal part B of the rotating handle is rotatably connected to the upper part of the guide rail;

[0028] The downward handle and the rotating handle are misaligned.

[0029] Furthermore, a U-shaped connector is provided on the horizontal part B where the rotating handle is rotatably connected to the guide rail;

[0030] The upper part of the guide rail is provided with two annular bosses arranged at intervals along its axial direction; the two annular bosses form the radial rail of the guide rail.

[0031] The U-shaped connector of the rotating handle is rotatably connected to the radial rail of the guide rail.

[0032] Furthermore, the locking hook device also includes: two rocker arms;

[0033] One end of each of the two rocker arms is hinged to the bottom of the moving column, and the two rocker arms are arranged symmetrically.

[0034] The locking hook is located between the two rocker arms, and the locking body of the locking hook is hinged to the other end of the two rocker arms.

[0035] Furthermore, a sealing gasket is provided on the upper end face of the guide rail;

[0036] The sealing gasket is fitted over the moving column and includes a rubber layer and a metal layer.

[0037] The rubber layer is located between the metal layer and the guide rail;

[0038] The rubber layer is interference-fitted with the moving column;

[0039] The metal layer is fitted with the moving column with a clearance.

[0040] One end of the spring is in contact with the metal layer, and the other end is in contact with the downward-pressing handle.

[0041] Furthermore, each of the air inlet pipes is equipped with a dispersion head at its outlet end.

[0042] Furthermore, a sealing gasket is provided on the lower end face of the sealing plate.

[0043] Beneficial effects:

[0044] (1) The present invention provides a self-locking air filter outlet sealing device. Pressing down the handle drives the moving column, causing the moving column to reciprocate relative to the sealing plate. When the moving column reciprocates, it pushes the locking hook to rotate, causing the locking hook to hook onto or release the internal support of the air filter, thereby causing the sealing plate to seal or open the opening end of the air filter. The device is easy to operate and can quickly seal the opening end of the air filter, thereby effectively improving the efficiency of air filter maintenance and reducing the labor cost required for air filter maintenance. The device maintains the hooked state through spring preload to achieve self-locking, so that the locking hook device can stably hook onto the internal support of the air filter, preventing the sealing device from being released during use and affecting the maintenance effect of the air filter.

[0045] (2) The self-locking air filter outlet sealing device of the present invention has a downward handle that is threadedly engaged with the moving column, thereby adjusting the preload of the spring so that the sealing device can further ensure the stable connection between the sealing device and the air filter.

[0046] (3) The self-locking air filter outlet sealing device of the present invention provides support for the reciprocating motion of the pressing handle by rotating the handle, so that the sealing device can easily switch between the locked and unlocked states by gripping and releasing the pressing handle and the rotating handle, so that the sealing device can be operated with one hand, further improving the maintenance efficiency of the air filter.

[0047] (4) In a self-locking air filter outlet sealing device of the present invention, a horizontal part A of the pressing handle is threadedly connected to the top of the moving column. The pressing handle is U-shaped and the rotating handle is U-shaped. The pressing handle and the rotating handle are misaligned. When the pressing handle is screwed in or out, the pre-tightening force can be changed, so that the sealing device is applicable to air filters with different internal support positions. Both the pressing handle and the rotating handle are U-shaped. The pressing handle and the rotating handle are misaligned. When the pressing handle is screwed in or out, the U-shaped structure and rotatable feature of the rotating handle can avoid the pressing handle and do not interfere with each other, so that the pressing handle can rotate freely.

[0048] (5) A self-locking air filter outlet sealing device of the present invention has two annular protrusions on the upper part of the guide rail. The two annular protrusions form the radial rail of the guide rail. The U-shaped connector of the rotating handle is rotatably connected to the radial rail of the guide rail. The two annular protrusions form an axial limit on the rotating handle to prevent the rotating handle from moving axially and affecting the sealing effect of the sealing device on the air filter.

[0049] (6) A self-locking air filter outlet sealing device of the present invention has one end of two rocker arms respectively hinged to the bottom of the moving column, and the locking body of the locking hook is hinged to the other end of the two rocker arms. The rocker arms can increase the rotation angle of the locking hook, so that the rocker arms can be fully extended when the locking hook device is in the unlocked state, and can hook the internal support of the air filter to achieve sealing of the opening end of the air filter.

[0050] (7) A self-locking air filter outlet sealing device of the present invention has a sealing combination gasket on the upper end face of the guide rail. The rubber layer of the sealing combination gasket is interference-fitted with the moving column to prevent air leakage at the moving column and the guide rail. The metal layer can press the rubber layer to the guide rail, so that the rubber layer is attached to the upper end face of the guide rail, further improving the sealing effect of the rubber layer.

[0051] (8) The self-locking air filter outlet sealing device of the present invention has a dispersing head at the outlet end of the air inlet pipe, so that the high pressure gas rushing into the air filter is more evenly distributed.

[0052] (9) The self-locking air filter outlet sealing device of the present invention has a sealing gasket on the lower end face of the sealing plate, which can further improve the sealing performance between the air filter opening end and the sealing device, avoid pressure leakage at the air filter opening end, and ensure the maintenance effect of the air filter. Attached Figure Description

[0053] Figure 1 This is a schematic diagram of the structure of the present invention in the locked state;

[0054] Figure 2 This is a schematic diagram of the structure of the present invention in the unlocked state;

[0055] Figure 3 This is a schematic diagram of the sealing plate assembly device of the present invention;

[0056] Figure 4 This is a schematic diagram of the locking hook device of the present invention;

[0057] Figure 5 This is a schematic diagram of the guide rail structure of the present invention;

[0058] Figure 6 This is a schematic diagram of the structure of the moving column of the present invention;

[0059] Figure 7 This is a schematic diagram of the rocker arm of the present invention;

[0060] Figure 8 This is a schematic diagram A of the locking hook structure of the present invention;

[0061] Figure 9 This is a schematic diagram B of the locking hook structure of the present invention;

[0062] Figure 10 This is a schematic diagram of the static column of the present invention;

[0063] Figure 11 This is a schematic diagram of the downward-pressing handle of the present invention;

[0064] Figure 12 This is a schematic diagram of the spring structure of the present invention;

[0065] Figure 13 This is a schematic diagram of the cotter pin structure of the present invention;

[0066] Figure 14 This is a schematic diagram of the rotating handle of the present invention;

[0067] Figure 15 This is a schematic diagram of the sealing gasket structure of the present invention;

[0068] Figure 16 This is a schematic diagram of the structure of the present invention when it is located inside the air filter element in the locked state;

[0069] Figure 17 This is a schematic diagram of the structure of the present invention when it is located inside the air filter in the unlocked state;

[0070] Among them, 1-sealing plate assembly, 11-sealing plate, 111-sealing plate central hole, 12-air inlet pipe, 121-air inlet end, 122-air outlet end, 13-quick connector, 14-dispersing head, 15-sealing gasket, 2-locking hook device, 21-stationary column, 211-top of stationary column, 212-stationary column U-groove, 213-stationary column lower hole, 22-locking hook, 221-tenon, 222-tenon hole, 223-central hole, 224-groove, 23-cotter pin, 24-rocker arm, 241-rocker arm hole A, 242-rocker arm hole B, 25-Moving column, 251-Lower hole of moving column, 252-Middle hole of moving column, 253-Upper hole of moving column, 26-Guide rail, 261-Lower end face of guide rail, 262-Axial rail, 263-Radial rail, 27-Sealing combination gasket, 271-Rubber layer, 272-Metal layer, 28-Spring, 29-Press handle, 291-Press handle handle, 292-Threaded hole, 30-Rotating handle, 301-Rotating handle handle, 302-U-shaped connector, 303-Rotating handle fixing hole, 4-Air filter element, 41-Internal support. Detailed Implementation

[0071] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0072] This embodiment provides a self-locking air filter outlet sealing device, suitable for air filter elements 4 with internal supports 41 in their internal cavities. Figure 1 and Figure 2 As shown, the self-locking air filter outlet sealing device includes: a sealing plate assembly 1 and a locking hook device 2.

[0073] The sealing plate assembly 1 is used to seal the outlet (i.e., the open end) of the air filter element and to inject high-pressure gas into the internal cavity of the air filter element. Figure 3 As shown, the sealing plate assembly 1 includes: a sealing plate 11, a sealing gasket 15, one or more air inlet pipes 12, several quick-connect pipe joints 13, and several dispersing heads 14.

[0074] The size and shape of the sealing plate 11 are the same as those of the air filter 4. Figure 16 and Figure 17 The shape of the opening end of the sealing plate 11 is matched to seal the opening end of the air filter element 4. The sealing plate 11 is provided with a sealing plate central hole 111, and the axis of the sealing plate central hole 111 is perpendicular to the sealing plate 11.

[0075] As an example, the bottom end face of the sealing plate 11 is provided with a sealing gasket 15 to improve the sealing performance at the opening end of the air filter element 4, prevent pressure leakage at the opening end of the air filter element 4, thereby ensuring that the high-pressure gas rushing into the air filter element can expand instantly and evenly fill the internal cavity of the air filter element, and form an instantaneous high pressure difference between the inside and outside of the air filter element, which can effectively flush off dust particles attached to the outer surface of the filter material of the air 4, and also effectively clean all corners of the filter element 4.

[0076] The end of the sealing plate 11 that contacts the opening of the air filter element 4 is the lower end face of the sealing plate 11, and the other end is the upper end face of the sealing plate 11.

[0077] One or more of the aforementioned air intake pipes 12 are disposed on the sealing plate 11 (i.e., the axis of the air intake pipe 12 is perpendicular to the surface of the sealing plate 11). The air intake pipe 12 extends out of the upper end face of the sealing plate 11 (i.e., Figure 3 One end (upper part) is the air intake end 121 of the air intake pipe 12, which extends from the lower end face of the sealing plate 11 (i.e., the upper part). Figure 3 The lower end of the air intake pipe 12 is the air outlet 122 of the air intake pipe 12. The air intake pipe 12 is sealed to the sealing plate 11.

[0078] As an example, the axis of each intake pipe 12 is perpendicular to the surface of the sealing plate 11, which helps to reduce the space occupied by the intake pipe 12.

[0079] As an example, the intake pipe 12 is connected to the sealing plate 11 in a sealed manner by welding.

[0080] Each air intake pipe 12 is equipped with a quick-connect fitting 13 at its air intake end 121, making it easy to connect the air intake pipe 12 to other pipes; each air intake pipe 12 is equipped with a diffuser 14 at its air outlet end 122, so that the high-pressure gas entering the internal cavity of the air filter element 4 through the air intake pipe 12 can be sprayed evenly, which is beneficial to the uniform distribution of air pressure in the internal cavity of the air filter element 4 and to the effect of high-pressure gas on the entire air filter element 4.

[0081] As an example, there are preferably two intake pipes 12, which are axially symmetrical about the axis of the central hole 111 of the sealing plate.

[0082] The locking hook device 2 is used to hook onto the internal support 41 of the air filter element 4. For example... Figure 4 As shown, the locking hook device 2 includes: a stationary column 21, a locking hook 22, a moving column 25, a guide rail 26, a sealing combination gasket 27, a spring 28, a downward pressure handle 29, a rotating handle 30, two rocker arms 24, and several cotter pins 23. Figure 13 ).

[0083] like Figure 5As shown, the guide rail 26 is cylindrical and coaxially disposed in the central hole 111 of the sealing plate 11. The portion of the guide rail 26 extending beyond the sealing plate 11 is the upper part of the guide rail 26, and the portion disposed within the central hole 111 is the lower part. The central hole of the guide rail 26 serves as the axial rail 262 of the guide rail 26. The upper outer circumference of the cylindrical structure is provided with two annular bosses spaced apart along its axial direction. The two annular bosses form the radial rail 263 of the guide rail 26 (i.e., the track arranged circumferentially along the guide rail 26). When the lower part of the guide rail 26 extends into the central hole 111 of the sealing plate, the lower annular boss abuts against the upper end face of the sealing plate 11, forming a limiting position. The guide rail 26 and the sealing plate 11 are fixedly connected by welding.

[0084] like Figure 4 As shown, the movable column 25 is coaxially disposed within the axial rail 262 of the guide rail 26 and reciprocates along the axial direction of the guide rail 26. The end of the movable column 25 extending above the guide rail 26 is called the top of the movable column 25, and the end extending below the guide rail 26 is called the bottom of the movable column 25. Figure 6 As shown, the bottom of the moving column 25 is provided with a lower moving column hole 251, the axis of which is perpendicular to the axis of the moving column 25. The body of the moving column 25 is provided with a middle moving column hole 252, the axis of which is perpendicular to the axis of the moving column 25. A cotter pin 23 is provided in the middle moving column hole 252, designated as cotter pin a. The lower end face 261 of the guide rail limits the cotter pin a, preventing the moving column 25 from disengaging from the guide rail 26. The top of the moving column 25 is provided with external threads. The top of the moving column 25 is also provided with an upper moving column hole 253, the axis of which is perpendicular to the axis of the moving column 25. A cotter pin 23 is provided in the upper moving column hole 253, designated as cotter pin b.

[0085] like Figure 4 As shown, the two rocker arms 24 are symmetrically arranged at both ends of the lower hole 251 of the moving column. Figure 7 As shown, each rocker arm 24 has two through holes, namely rocker arm hole A241 and rocker arm hole B242. Rocker arm holes A241 and B242 are arranged at intervals along the length of the rocker arm 24. The position of rocker arm hole A241 corresponds to the position of the lower hole 251 of the moving post. A cotter pin 23 (let this cotter pin 23 be called cotter pin c) is inserted sequentially into the rocker arm hole A241 of one rocker arm 24, the lower hole 251 of the moving post 25, and the rocker arm hole A241 of the other rocker arm 24. Both rocker arms 24 rotate around the cotter pin c.

[0086] like Figure 4 As shown, the locking hook 22 is located between the two rocker arms 24. Figure 8 and Figure 9As shown, one end of the locking hook 22 has a tenon 221 along its axial direction, and the tenon 221 has a mortise 222 that passes perpendicularly through the axis of the locking hook 22; the other end of the locking hook 22 has a groove 224, which faces vertically upward. A locking hook central hole 223 is provided between the tenon 221 and the groove 224 of the locking hook 22. The axis of the locking hook central hole 223 passes perpendicularly through the axis of the locking hook 22 and is parallel to the axis of the mortise 222. The locking hook central hole 223 is hinged to the rocker arm holes B242 of the two rocker arms 24 by a cotter pin 23, which is called a cotter pin d. The locking hook 222 rotates around the cotter pin d at the location of the locking hook central hole 223.

[0087] like Figure 4 As shown, one end of the stationary column 21 is fixed to the lower end face of the sealing plate 11, making this end face the top 211 of the stationary column, and the other end the bottom of the stationary column 21. The axis of the stationary column 21 is parallel to the axis of the moving column 25; Figure 10 As shown, the bottom of the stationary column 21 is provided with a U-shaped groove 212. The space between the U-shaped groove 212 and the two rocker arms 24 is opposite. The two side walls of the U-shaped groove 212 are respectively provided with stationary column lower holes 213, and the two stationary column lower holes 213 are coaxial. The tenon 221 of the locking hook 22 is hinged to the two stationary column lower holes 213 by a cotter pin 23, which is called cotter pin e. The tenon 221 of the locking hook 22 rotates around the cotter pin e.

[0088] The downward-pressing handle 29 is used to drive the moving column 25 to reciprocate. For example... Figure 11 As shown, the downward-pressing handle 29 has a U-shaped structure, including a vertical part A and two horizontal parts A. One of the horizontal parts A has a connecting block, and the geometric center of the connecting block has a threaded hole 292, which engages with the external thread on the top of the moving column 25 to achieve connection. The downward-pressing handle 29 screws in or out along the axial direction of the moving column 25. The connecting block of the downward-pressing handle 29 is located between the guide rail 26 and the cotter pin b. The cotter pin b limits the connection block of the downward-pressing handle 29, preventing the downward-pressing handle 29 from detaching from the moving column 25. Let the horizontal part A with the machined connecting block be the downward-pressing handle 291.

[0089] like Figure 4 As shown, the spring 28 ( Figure 12 The spring 28 is coaxially sleeved on the moving column 25. One end of the spring 28 abuts against the guide rail 26, and the other end of the spring 28 abuts against the connecting block of the pressing handle 29. The spring 28 is initially in a compressed state, which can provide pre-tightening force to achieve self-locking of the sealing device and prevent the sealing device from being released from the lock, thereby making the locking connection between the sealing device and the air filter element 4 more secure.

[0090] The rotating handle 30 provides support for the movement of the pressing handle 29. For example... Figure 14As shown, the rotating handle 30 has a U-shaped structure, including a vertical part B and two horizontal parts B. A U-shaped connector 302 is provided on one horizontal part B, and the plane of the U-shaped connector 302 is parallel to the surface of the sealing plate 11. The U-shaped connector 302 of the rotating handle 30 is rotatably engaged with the radial rail 263 of the guide rail 26. Specifically, the U-shaped groove of the U-shaped connector 302 of the rotating handle 30 is inserted into the radial rail 263 of the guide rail 26. The two ends of the U-shaped connector 302 are respectively provided with rotating handle fixing holes 303. The two rotating handle fixing holes 303 are coaxial, and a cotter pin 23 is simultaneously inserted into both rotating handle fixing holes 303 to lock the U-shaped connector 302 onto the radial rail 263. This cotter pin 23 is called a cotter pin f. Two annular bosses forming radial rails 263 on the guide rail 26 axially limit the U-shaped connector 302 of the rotating handle 30, preventing axial movement of the rotating handle 30. Let the horizontal portion B without the U-shaped connector 302 be the rotating handle 301. The rotating handle 30 is misaligned with the pressing handle 29, meaning the rotating handle 301 is located between the two horizontal portions A of the pressing handle 29. When the pressing handle 29 is screwed in or out, the U-shaped structure and rotatable feature of the rotating handle 30 allow it to avoid interference with the pressing handle 29.

[0091] As an example, the upper end face of the guide rail 26 is provided with a sealing gasket 27. For example... Figure 15 As shown, the sealing gasket 27 is fitted over the moving column 25. The sealing gasket 27 has a two-layer structure: a rubber layer 271 and a metal layer 272. The rubber layer 271 is located between the metal layer 272 and the guide rail 26. The rubber layer 271 is interference-fitted with the moving column 25 to seal the gap between the moving column 25 and the axial rail 262 of the guide rail 26, preventing high-pressure gas leakage. The metal layer 272 is clearance-fitted with the moving column 25 to press the rubber layer 271 against the guide rail 26, so that the rubber layer 271 is in contact with the top end face of the guide rail 26, further ensuring the sealing effect of the rubber layer 271. At this time, one end of the spring 28 abuts against the metal layer 272 of the sealing gasket 27, while the other end still abuts against the connecting block of the downward handle 29.

[0092] Working principle:

[0093] The locking hook device 2 switches the unlocking state of the sealing device by pressing down the handle 29 and reciprocating relative to the sealing plate 11. Figure 2 ) and locked state ( Figure 1 This causes the sealing device to block the opening of the air filter element 4.

[0094] When the handle 29 is pushed down, the spring 28 is further compressed; the bottom of the moving column 25 is pushed away from the lower end face of the sealing plate 11 as the handle 29 is pushed down; the rocker arm 24 moves away from the locking hook hole 223 of the locking hook 22 as the moving column 25 moves away, causing the tenon 221 of the locking hook 22 to rotate around the cotter pin e. At this time, the locking hook 22 changes from the initial state (i.e., the locking hook 22 is perpendicular or nearly perpendicular to the axis of the moving column 25) to the unlocked state (i.e., the locking hook 22 is parallel or nearly parallel to the axis of the moving column 25). The locking hook 22 is released from the internal support 41 of the air filter 4, which can release the locking connection between the sealing device and the air filter 4, or can insert the sealing device into the air filter 4, preparing for the locking between the air filter 4 and the sealing device. The rocker arm 24 can ensure that the locking hook 22 can be fully extended, preparing to hook the internal support 41 of the air filter 4.

[0095] When the handle 29 is released, the spring 28 extends, and the handle 29 moves away from the upper surface of the sealing plate 11 under the spring force of the spring 28. The bottom of the moving column 25 moves closer to the lower surface of the sealing plate 11 as the handle 29 is pressed down; the rocker arm 24 pulls the locking hook 22 at the locking hook hole 223 as the moving column 25 pulls, causing the tenon 221 of the locking hook 22 to rotate in the opposite direction around the cotter pin e until the locking hook 22 changes from the unlocked state to the locked state (i.e., the initial state). At this time, the groove 224 of the locking hook 22 can hook the internal support 41 of the air filter element 4, thereby realizing the locking connection between the sealing device and the air filter element 4.

[0096] The downward-pressing handle 29 is threaded into the moving column 25, allowing the sealing device to adjust the preload of the spring 28 by screwing the downward-pressing handle 29 in and out. When the downward-pressing handle 29 is screwed in, the spring 28 is compressed, increasing the spring locking force and further ensuring a stable connection between the air filter element 4 and the sealing device.

[0097] The locking hook device 2 can also provide support for the movement of the pressing handle 29 by means of the rotating handle 30. By simultaneously holding and releasing the pressing handle 29 and the rotating handle 30, the locking and unlocking states of the locking hook device can be switched, making the blocking device operable with one hand and more convenient.

[0098] How to use:

[0099] Taking the example where the opening end of air filter 4 is vertically upward, when sealing the opening end of air filter 4, first place air filter 4 with the opening end facing upward; adjust the downward handle 291 and the rotating handle 301 so that they are opposite and parallel (e.g., Figure 1 and Figure 2 (As shown); Hold the downward handle 291 and the rotating handle 301 to unlock the locking hook device 2. Figure 16Insert the sealing device vertically into the air filter 4; gradually loosen the downward handle 291 so that the groove 224 of the locking hook 22 hooks into the internal support 41 of the air filter 4, locking the sealing device and the internal support 41 of the air filter 4 together. The sealing plate 11 abuts against the open end of the air filter 4, completing the sealing. Further, the preload of the spring 28 can be increased by screwing the downward handle 29 inward, thus securing the connection between the air filter 4 and the sealing device.

[0100] When opening the air filter 4, hold the downward handle 291 and the rotating handle 301 to unlock the locking device 2. Figure 17 Release the locking connection between the sealing device and the internal support 41 of the air filter 4, lift the sealing device upward to separate the sealing device from the air filter 4, and complete the opening.

[0101] In summary, the above are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A self-locking air filter outlet sealing device, characterized in that, include: The sealing plate assembly (1) and the locking hook assembly (2); The sealing plate assembly (1) includes: a sealing plate (11) and one or more air inlet pipes (12); The air intake pipe (12) is installed on the sealing plate (11); The locking device (2) includes: a locking hook (22), a pressing handle (29), a moving column (25), and a spring (28); The movable column (25) is vertically installed on the sealing plate (11), with a downward handle (29) at the top and a locking hook (22) at the bottom. The downward handle (29) is used to drive the moving column (25), so that the moving column (25) reciprocates relative to the sealing plate (11); When the moving column (25) reciprocates, it pushes the locking hook (22) to rotate, so that the locking hook (22) hooks or gets off the internal support (41) of the air filter (4), thereby blocking the sealing plate (11) to block or open the opening end of the air filter (4); A spring (28) is positioned between the pressing handle (29) and the sealing plate (11), and its preload force keeps the locking hook (22) in a hooked state. The locking hook device (2) further includes: a stationary column (21) and a guide rail (26); the sealing plate (11) is provided with a sealing plate central hole (111); the guide rail (26) is a cylindrical structure, coaxially sleeved in the sealing plate central hole (111), and its central hole serves as the axial rail (262) of the guide rail (26); the moving column (25) is coaxially arranged in the axial rail (262) of the guide rail (26) and reciprocates along the axial direction of the guide rail (26); the stationary column (21) is arranged on the lower end face of the sealing plate (11), and its axis is parallel to the axis of the moving column (25); One end of the locking hook (22) is provided with a groove for hooking the internal support (41) of the air filter (4), and the other end of the locking hook (22) is hinged to the bottom of the stationary column (21); the locking hook (22) rotates around the hinge point with the stationary column (21) as the moving column (25) reciprocates; the locking hook device (2) also includes: two rocker arms (24); one end of the two rocker arms (24) is respectively hinged to the bottom of the moving column (25), and the two rocker arms (24) are arranged symmetrically; the locking hook (22) is located between the two rocker arms (24), and the locking body of the locking hook (22) is hinged to the other end of the two rocker arms (24); one end of the spring (28) abuts against the guide rail (26), and the other end of the spring (28) abuts against the pressing handle (29).

2. The self-locking air filter outlet sealing device as described in claim 1, characterized in that, The top of the moving column (25) is provided with external threads; The downward handle (29) is provided with a threaded hole, which is engaged with the external thread on the top of the moving column (25) to adjust the preload of the spring (28).

3. The self-locking air filter outlet sealing device as described in claim 1, characterized in that, The locking hook device (2) further includes: a rotating handle (30); A rotating handle (30) is located on the upper part of the guide rail (26) to provide support for the reciprocating motion of the pressing handle (29).

4. The self-locking air filter outlet sealing device as described in claim 3, characterized in that, The downward handle (29) has a U-shaped structure, including: a vertical part A and two horizontal parts A; one horizontal part A of the downward handle (29) is threadedly connected to the top of the moving column (25); The rotating handle (30) has a U-shaped structure, including: a vertical part B and two horizontal parts B; one horizontal part B of the rotating handle (30) is rotatably connected to the upper part of the guide rail (26); The downward handle (29) and the rotating handle (30) are misaligned.

5. The self-locking air filter outlet sealing device as described in claim 4, characterized in that, The horizontal part B, which is rotatably connected to the guide rail (26), is provided with a U-shaped connector; The upper part of the guide rail (26) is provided with two annular bosses arranged at intervals along its axial direction; the two annular bosses form the radial rail (263) of the guide rail (26). The U-shaped connector of the rotating handle (30) is rotatably connected to the radial rail (263) of the guide rail (26).

6. The self-locking air filter outlet sealing device as described in claim 1, characterized in that, The upper end face of the guide rail (26) is provided with a sealing combination gasket (27). The sealing gasket (27) is fitted over the moving column (25). The sealing gasket (27) includes a rubber layer (271) and a metal layer (272). The rubber layer (271) is located between the metal layer (272) and the guide rail (26); The rubber layer (271) is interference-fitted with the moving column (25); The metal layer (272) and the moving column (25) are fitted with a clearance. One end of the spring (28) abuts against the metal layer (272), and the other end of the spring (28) abuts against the pressing handle (29).

7. A self-locking air filter outlet sealing device as described in any one of claims 1-6, characterized in that, Each of the air inlet pipes (12) is provided with a diffuser (14) at its outlet end (122).

8. A self-locking air filter outlet sealing device as described in any one of claims 1-6, characterized in that, The lower end face of the sealing plate (11) is provided with a sealing gasket (15).

Images