Self-locking air filter element outlet plugging device

Abstract

The invention discloses a self-locking air filter element outlet plugging device, which belongs to the technical field of filter devices, and 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 lifting handle is pressed down to drive the movable column to do reciprocating motion relative to the plugging plate; when the movable column reciprocates, the lock hook is pushed to rotate, so that the lock hook hooks or gets rid of the internal support of the air filter element, and the opening end of the air filter element is blocked or opened by the blocking plate; and the spring is arranged between the pressing handle and the plugging plate. The locking state and the unlocking state are switched by pushing and pressing the lifting handle, so that the problem of convenience in blocking an outlet of the air filter element internally provided with an internal support is solved; meanwhile, the plugging device stably hooks the internal support of the air filter element through the pre-tightening force of the spring, so that the opening end of the air filter element is effectively plugged, and the maintenance effect of the air filter element is ensured.

Description

Technical Field

[0001] The present invention belongs to the technical field of filtering devices, and particularly relates to a self-locking air filter outlet plugging device. Background Art

[0002] With the wide use of internal combustion engines, the consumption quantity of air filters for internal combustion engine intake filtration is larger. After being used for a period of time, the air filters need to be maintained to reduce the intake resistance and the cost of using the internal combustion engine.

[0003] The existing cleaning method mainly maintains the air filter through an air filter maintenance device. The existing air filter maintenance device plugs the outlet of the air filter by a method of backward pressing. However, for this plugging structure, it is necessary to press the air filter tightly against the filter outlet plugging mechanism through a backward pressing mechanism, which is inconvenient to operate.

[0004] For some air filters, internal supports are provided inside to prevent the air filters from fitting together during use, which affects the use effect of the air filters. For such air filters, a plugging device can be designed that can not only plug the outlet of the air filter but also achieve rapid plugging, making the maintenance process of the air filter more convenient and fast. Summary of the Invention

[0005] In view of this, the present invention provides a self-locking air filter outlet plugging device, which switches the locking state and the unlocking state by pushing a downward pressing handle, thereby solving the problem of the convenience of plugging the outlet of an air filter provided with an internal support; at the same time, through the spring pre-tightening force, the plugging device can stably hook the internal support of the air filter, thereby effectively plugging the open end of the air filter and ensuring the maintenance effect of the air filter.

[0006] The present invention is realized by the following technical solutions:

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

[0008] The plugging plate combination device includes: a plugging plate and more than one air inlet pipe;

[0009] The air inlet pipe is arranged on the plugging plate;

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

[0011] The moving column is vertically arranged on the plugging plate, with a downward pressing handle at the top and a locking hook at the bottom;

[0012] The downward pressing handle is used to drive the moving column, so that the moving column makes a reciprocating motion relative to the plugging plate;

[0013] When the moving column makes reciprocating motion, it pushes the lock hook to rotate, so that the lock hook hooks or breaks away from the internal support of the air filter element, thereby causing the blocking plate to block or open the open end of the air filter element;

[0014] The spring is arranged between the downward pressing handle and the blocking plate, and the locking hook is kept in a hooked state through its pre-tightening force.

[0015] Furthermore, the locking hook device further comprises: a static column and a guide rail;

[0016] The blocking plate is provided with a blocking plate center hole;

[0017] The guide rail is a cylindrical structure, coaxially sleeved in the hole of the blocking plate, with the center hole serving as the axial track of the guide rail;

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

[0019] The static column is arranged on the lower end surface of the blocking plate, and its axis is parallel to the axis of the dynamic column;

[0020] One end of the lock hook is provided with a groove for hooking the internal support of the air filter element, and the other end of the lock hook is hinged to the bottom of the static column; the lock hook rotates around the hinge with the static column as the dynamic column reciprocates; the lock body of the lock hook is hinged to the bottom of the dynamic column;

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

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

[0023] The pressing handle is provided with a threaded hole, which cooperates with the external thread on the top of the moving column to adjust the preload force of the spring.

[0024] Furthermore, the locking hook device further comprises: a rotating handle;

[0025] The rotating handle is arranged on the upper part of the guide rail to provide support for the reciprocating motion of the pressing handle.

[0026] Furthermore, the push-down handle is a U-shaped structure, comprising: a vertical portion A and two horizontal portions A; one horizontal portion A of the push-down handle is threadedly connected to the top of the moving column;

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

[0028] The push-down handle and the rotating handle are misaligned.

[0029] Furthermore, a U-shaped connector is provided on the horizontal portion 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 connecting piece of the rotary handle is rotatably connected to the radial rail of the guide rail.

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

[0033] One ends of the two rocker arms are respectively hinged to the bottom of the moving column, and the two rocker arms are symmetrically arranged;

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

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

[0036] The sealing gasket combination is sleeved outside the moving column, and the sealing gasket combination 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 in interference fit with the moving column;

[0039] The metal layer is in clearance fit with the moving column;

[0040] One end of the spring abuts against the metal layer, and the other end of the spring abuts against the pressing handle.

[0041] Furthermore, a dispersion head is provided at the air outlet end of each air inlet pipe.

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

[0043] Beneficial effects:

[0044] (1) For a self-locking air filter outlet plugging device of the present invention, the pressing handle is used to drive the moving column, so that the moving column makes a reciprocating motion relative to the plugging plate. When the moving column makes a reciprocating motion, it pushes the locking hook to rotate, so that the locking hook hooks or disengages from the internal support of the air filter, so that the plugging plate plugs or opens the opening end of the air filter. The device is easy to operate, can quickly realize the plugging of the opening end of the air filter, thereby effectively improving the efficiency of air filter maintenance, and further reducing the labor cost required for air filter maintenance; the device maintains the hooked state through the spring pre-tightening force to achieve self-locking, so that the locking hook device can stably hook the internal support of the air filter and avoid the plugging device releasing the locking during use, affecting the maintenance effect of the air filter.

[0045] (2) The present invention provides a self-locking air filter outlet sealing device, wherein the downward pressing handle cooperates with the thread of the moving column to adjust the preload force of the spring, so that the sealing device can further ensure a stable connection between the sealing device and the air filter.

[0046] (3) The present invention provides a self-locking air filter outlet sealing device, wherein the rotating handle provides support for the reciprocating motion of the pressing handle, so that the sealing device can be simply switched between the locking state and the unlocking state by holding and releasing the pressing handle and the rotating handle, so that the sealing device can be operated with one hand, thereby further improving the maintenance efficiency of the air filter.

[0047] (4) A self-locking air filter outlet sealing device of the present invention, a horizontal portion A of a push-down handle is threadedly connected to the top of the moving column, the push-down handle is a U-shaped structure, the rotating handle is a U-shaped structure, and the push-down handle and the rotating handle are offset, and when the push-down handle is screwed in or out, the preload force can be changed, so that the sealing device is suitable for air filters with different internal support positions; the push-down handle and the rotating handle are both U-shaped structures, and the push-down handle and the rotating handle are offset, and when the push-down handle is screwed in or out, the U-shaped structure and the rotatable feature of the rotating handle can avoid the push-down handle, without interfering with each other, so that the push-down handle can rotate freely.

[0048] (5) A self-locking air filter outlet sealing device of the present invention has two annular bosses on the upper part of the guide rail, the two annular bosses 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, and the two annular bosses form an axial limit for the rotating handle to prevent the rotating handle from axial movement, which affects 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 two rocker arms, one end of which is hinged to the bottom of the moving column respectively, and the lock body of the lock hook is hinged to the other end of the two rocker arms. The rocker arms can increase the rotation angle of the lock hook, so that the rocker arms can be fully extended when the lock hook device is in the unlocked state, and can hook the internal support of the air filter to achieve the sealing of the open end of the air filter.

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

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

[0052] (9) A self-locking type air filter outlet plugging device of the present invention, wherein a sealing gasket is provided on the lower end surface of the plugging plate, which can further improve the sealing performance between the opening end of the air filter and the plugging device, avoid pressure relief at the opening end of the air filter, and ensure the maintenance effect of the air filter. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0055] Figure 3 is a schematic structural diagram of the plugging plate combination device of the present invention;

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

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

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

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

[0060] Figure 8 is a schematic structural diagram A of the lock hook of the present invention;

[0061] Figure 9 is a schematic structural diagram B of the lock hook of the present invention;

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

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

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

[0065] Figure 13 is a schematic structural diagram of the split pin of the present invention;

[0066] Figure 14 is a schematic structural diagram of the rotary handle of the present invention;

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

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

[0069] Figure 17 The structural schematic diagram of the present invention when it is inside the air filter in the unlocked state;

[0070] Wherein, 1 - plugging plate combination device, 11 - plugging plate, 111 - middle hole of the plugging plate, 12 - air inlet pipe, 121 - air inlet end, 122 - air outlet end, 13 - quick pipe joint, 14 - dispersion head, 15 - gasket, 2 - locking hook device, 21 - static column, 211 - top of the static column, 212 - U-shaped groove of the static column, 213 - lower hole of the static column, 22 - locking hook, 221 - tenon head, 222 - mortise hole, 223 - middle hole, 224 - groove, 23 - split pin, 24 - rocker arm, 241 - rocker arm hole A, 242 - rocker arm hole B, 25 - moving column, 251 - lower hole of the moving column, 252 - middle hole of the moving column, 253 - upper hole of the moving column, 26 - guide rail, 261 - lower end face of the guide rail, 262 - axial rail, 263 - radial rail, 27 - sealing combined gasket, 271 - rubber layer, 272 - metal layer, 28 - spring, 29 - downward pressing handle, 291 - downward pressing handle grip, 292 - threaded hole, 30 - rotating handle, 301 - rotating handle grip, 302 - U-shaped connecting piece, 303 - rotating handle fixing hole, 4 - air filter, 41 - internal support. Specific embodiments

[0071] The following combines the drawings and gives embodiments to describe the present invention in detail.

[0072] This embodiment provides a self-locking air filter outlet plugging device, which is applicable to the air filter 4 provided with an internal support 41 in the internal cavity. As Figure 1 and Figure 2 shown, the self-locking air filter outlet plugging device includes: a plugging plate combination device 1 and a locking hook device 2.

[0073] The plugging plate combination device 1 is used to plug the outlet (i.e., the open end) of the air filter and inject high-pressure gas into the internal cavity of the air filter. As Figure 3 shown, the plugging plate combination device 1 includes: a plugging plate 11, a gasket 15, more than one air inlet pipe 12, several quick pipe joints 13 and several dispersion heads 14.

[0074] The size and shape of the plugging plate 11 match the shape of the open end of the air filter 4 ( Figure 16 and Figure 17 ), and can plug the open end of the air filter 4. The plugging plate 11 is provided with a middle hole 111 of the plugging plate, and the axis of the middle hole 111 of the plugging plate is perpendicular to the plugging plate 11.

[0075] As an example, a sealing gasket 15 is provided on the bottom end face of the sealing plate 11, which is used to improve the sealing performance at the open end of the air filter element 4 and prevent pressure relief at the open end of the air filter element 4, thereby ensuring that the high-pressure gas rushing into the air filter element can expand instantly, 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 wash away the dust particles attached to the outer surface of the filter material of the air 4 and effectively clean every corner of the filter element 4.

[0076] One end of the blocking plate 11 that contacts the open end of the air filter element 4 is the lower end surface of the blocking plate 11 , and the other end is the upper end surface of the blocking plate 11 .

[0077] More than one air inlet pipe 12 is provided on the blocking plate 11 (i.e. the axis of the air inlet pipe 12 is perpendicular to the plate surface of the blocking plate 11). The air inlet pipe 12 extends out from the upper end surface of the blocking plate 11 (i.e. Figure 3 One end of the air inlet pipe 12 is the air inlet end 121, which extends out from the lower end surface of the blocking plate 11 (i.e. Figure 3 One end of the air inlet pipe 12 (below) is the air outlet end 122. The air inlet pipe 12 is tightly connected to the blocking plate 11.

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

[0079] As an example, the air inlet pipe 12 is tightly connected to the sealing plate 11 by welding.

[0080] A quick pipe connector 13 is provided on the air inlet end 121 of each air inlet pipe 12, so that the air inlet pipe 12 can be easily connected to other pipes; a dispersion head 14 is provided on the air outlet end 122 of each air inlet pipe 12, so that the high-pressure gas entering the internal cavity of the air filter element 4 through the air inlet pipe 12 can be evenly sprayed, which is beneficial to the uniform distribution of air pressure in the internal cavity of the air filter element 4 and the effect of high-pressure gas on the entire air filter element 4.

[0081] As an example, there are preferably two air intake pipes 12, and the two air intake pipes 12 are axially symmetrical with the axis of the central hole 111 of the blocking plate as the symmetry line.

[0082] The locking hook device 2 is used to hook the inner support 41 of the air filter element 4. Figure 4 As shown, the locking hook device 2 includes: a static column 21, a locking hook 22, a dynamic column 25, a guide rail 26, a sealing combination gasket 27, a spring 28, a pressing handle 29, a rotating handle 30, two rocker arms 24 and a plurality of cotter pins 23 ( Figure 13 ).

[0083] like Figure 5As shown, the guide rail 26 is cylindrical and is coaxially arranged in the central hole 111 of the sealing plate 11. The part of the guide rail 26 extending out of the sealing plate 11 is the upper part of the guide rail 26, and the part arranged in the central hole 111 of the sealing plate is the lower part of the guide rail 26. Let the central hole of the guide rail 26 be the axial rail 262 of the guide rail 26. Two annular bosses are arranged at intervals along the axial direction on the outer circumference of the upper part of the cylindrical structure. The two annular bosses form the radial rail 263 of the guide rail 26 (i.e., the track arranged along the circumferential direction of 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 of the two annular bosses abuts against the upper end face of the sealing plate 11 to form a limit. The guide rail 26 and the sealing plate 11 are fixedly connected by welding.

[0084] As Figure 4 shown, the moving column 25 is coaxially arranged in the axial rail 262 of the guide rail 26 and reciprocates along the axis of the guide rail 26. Let one end of the moving column 25 extending out of the upper part of the guide rail 26 be the top of the moving column 25, and the end extending out of the lower part of the guide rail 26 be the bottom of the moving column 25. As Figure 6 shown, a lower hole 251 of the moving column is provided at the bottom of the moving column 25, and the axis of the lower hole 251 of the moving column is perpendicular to the axis of the moving column 25. A middle hole 252 of the moving column is provided on the column body of the moving column 25, and the axis of the middle hole 252 of the moving column is perpendicular to the axis of the moving column 25. A split pin 23 is provided in the middle hole 252 of the moving column. Let this split pin 23 be split pin a. The lower end face 261 of the guide rail forms a limit for split pin a to prevent the moving column 25 from detaching from the guide rail 26. An external thread is provided at the top of the moving column 25. A upper hole 253 of the moving column is also provided at the top of the moving column 25, and the axis of the upper hole 253 of the moving column is perpendicular to the axis of the moving column 25. A split pin 23 is provided in the upper hole 253 of the moving column. Let this split pin 23 be split pin b.

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

[0086] As Figure 4 shown, the locking hook 22 is located between the two rocker arms 24. As Figure 8 and Figure 9As shown, one end of the locking hook 22 is provided with a tenon 221 along its axial direction, and a tenon hole 222 vertically penetrating the axis of the locking hook 22 is provided on the tenon 221; the other end of the locking hook 22 is provided with a groove 224, and the groove 224 faces vertically upward. A locking hook middle hole 223 is provided between the tenon 221 and the groove 224 of the locking hook 22. The axis of the locking hook middle hole 223 vertically penetrates the axis of the locking hook 22 and is parallel to the axis of the tenon hole 222. The locking hook middle hole 223 of the locking hook 22 is hinged to the rocker arm holes B242 of the two rocker arms 24 through a split pin 23, and let this split pin 23 be split pin d. The locking hook 22 rotates around the split pin d at the position where the locking hook middle hole 223 is located.

[0087] As Figure 4 shown, one end of the static column 21 is fixedly connected to the lower end surface of the sealing plate 11, and let this end surface be the top 211 of the static column, and the other end is the bottom of the static column 21. The axis of the static column 21 is parallel to the axis of the moving column 25; as Figure 10 shown, the bottom of the static column 21 is provided with a U-shaped groove 212. The U-shaped groove 212 faces the space between the two rocker arms 24. Static column lower holes 213 are respectively provided on the two side walls of the U-shaped groove 212, and the two static column lower holes 213 are coaxial. The tenon 221 and tenon hole 222 of the locking hook 22 are hinged to the two static column lower holes 213 through a split pin 23, and let this split pin 23 be split pin e. The tenon 221 of the locking hook 22 rotates around the split pin e.

[0088] The downward pressing handle 29 is used to drive the moving column 25 to move reciprocally. As Figure 11 shown, the downward pressing handle 29 is of a U-shaped structure and includes: a vertical part A and two horizontal parts A. A connecting block is provided on one of the horizontal parts A, and a threaded hole 292 is provided at the geometric center of the connecting block, which is in threaded fit with the external thread at the top of the moving column 25 to achieve connection. The downward pressing handle 29 is screwed into or out of the moving column 25 along the axial direction. The connecting block of the downward pressing handle 29 is located between the guide rail 26 and the split pin b, and the split pin b forms a limit for the connecting block of the downward pressing handle 29 to prevent the downward pressing handle 29 from detaching from the moving column 25. Let the horizontal part A processed with the connecting block be the downward pressing handle grip 291.

[0089] As Figure 4 shown, the spring 28 ( Figure 12 ) 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 downward pressing handle 29. The spring 28 is in a compressed state in the initial state and can provide a pre-tightening force for realizing the self-locking of the sealing device, avoiding the unlocking of the sealing device, so as to make the locking connection between the sealing device and the air filter element 4 more stable.

[0090] The rotating handle 30 provides support for the movement of the downward pressing handle 29. As Figure 14As shown, the rotary handle 30 has a U-shaped structure, including: a vertical portion B and two horizontal portions B. A U-shaped connector 302 is provided on one of the horizontal portions B, and the plane where the U-shaped connector 302 is located is parallel to the plate surface of the plugging plate 11. The U-shaped connector 302 of the rotary handle 30 is rotationally engaged with the radial rail 263 of the guide rail 26. Specifically, the U-shaped groove of the U-shaped connector 302 of the rotary handle 30 is inserted into the radial rail 263 of the guide rail 26. Rotating handle fixing holes 303 are respectively provided at both ends of the U-shaped connector 302. The two rotating handle fixing holes 303 are coaxial, and the split pin 23 is inserted into the two rotating handle fixing holes 303 at the same time to lock the U-shaped connector 302 on the radial rail 263, and let the split pin 23 be the split pin f. The two annular bosses on the guide rail 26 that form the radial rail 263 axially limit the U-shaped connector 302 of the rotary handle 30 to prevent the rotary handle 30 from moving axially. Let the horizontal portion B without the U-shaped connector 302 be the rotary handle grip 301. The rotary handle 30 is misaligned with the pressing handle 29, that is, the rotary handle grip 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 the rotatable feature of the rotary handle 30 can form an avoidance of the pressing handle 29, without interfering with each other.

[0091] As an example, a sealing gasket combination 27 is provided on the upper end surface of the guide rail 26. As Figure 15 shown, the sealing gasket combination 27 is sleeved outside the moving column 25. The sealing gasket combination 27 has a two-layer structure, namely: 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 in interference fit with the moving column 25 to seal the gap between the moving column 25 and the axial rail 262 of the guide rail 26 to avoid leakage of high-pressure gas. The metal layer 272 is in clearance fit with the moving column 25 to press the rubber layer 271 against the guide rail 26, so that the rubber layer 271 fits against the top end surface 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 combination 27, and the other end still abuts against the connecting block of the pressing handle 29.

[0092] Working principle:

[0093] The hook device 2 switches the unlocking state ( Figure 2 ) and the locking state ( Figure 1 ) of the plugging device through the reciprocating movement of the pressing handle 29 relative to the plugging plate 11, so that the plugging device plugs the open end of the air filter element 4.

[0094] When pushing down the lifting handle 29, the spring 28 is further compressed; the bottom of the moving column 25 moves away from the lower end face of the sealing plate 11 as the lifting handle 29 is pushed down; the rocker arm 24 pushes at the hook middle 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 split pin e. At this time, the locking hook 22 changes from the initial state (i.e., the state where the locking hook 22 is perpendicular or nearly perpendicular to the axis of the moving column 25) to the unlocking state (i.e., the state where the locking hook 22 is parallel or nearly parallel to the axis of the moving column 25), and the locking hook 22 gets rid of the internal support 41 of the air filter element 4, so that the locking connection between the sealing device and the air filter element 4 can be released, or the sealing device can be inserted into the interior of the air filter element 4 to prepare for the locking between the air filter element 4 and the sealing device. The rocker arm 24 can ensure that the locking hook 22 can fully expand and prepare for hooking the internal support 41 of the air filter element 4.

[0095] When releasing the lifting handle 29, the spring 28 extends, and the lifting handle 29 moves away from the upper end face of the sealing plate 11 under the spring force of the spring 28. The bottom of the moving column 25 approaches the lower end face of the sealing plate 11 as the lifting handle 29 moves; the rocker arm 24 pulls the locking hook 22 at the hook middle hole 223 as the moving column 25 moves, causing the tenon 221 of the locking hook 22 to rotate in the reverse direction around the split pin e until the locking hook 22 changes from the unlocking state to the locking 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, thus realizing the locking connection between the sealing device and the air filter element 4.

[0096] The lifting handle 29 is in threaded fit with the moving column 25, so that the pre-tightening force of the spring 28 can be adjusted by screwing the lifting handle 29 in and out. When screwing in the lifting handle 29, the spring 28 is compressed and the spring locking force is increased, further ensuring the 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 lifting handle 29 by means of the rotating handle 30. The locking state and unlocking state of the locking hook device are switched by simultaneously holding and releasing the lifting handle 29 and the rotating handle 30, so that the sealing device can be operated with one hand and the operation is more convenient.

[0098] Usage method:

[0099] Taking the case where the open end of the air filter element 4 is vertically upward as an example, when sealing the open end of the air filter element 4, first place the open end of the air filter element 4 upward; adjust the lifting handle grip 291 and the rotating handle grip 301 so that they are opposite and parallel (as Figure 1 and Figure 2 shown); hold the lifting handle grip 291 and the rotating handle grip 301 so that the locking hook device 2 is in the unlocking state ( Figure 16);Vertically place the plugging device into the interior of the air filter element 4; gradually loosen the downward pressing handle 291 so that the groove 224 of the locking hook 22 hooks the internal support 41 of the air filter element 4, and a locked connection is formed between the plugging device and the internal support 41 of the air filter element 4. The plugging plate 11 abuts against the open end of the air filter element 4 to complete the plugging. Further, the pre-tightening force of the spring 28 can be increased by screwing the downward pressing handle 29 downward to stabilize the connection between the air filter element 4 and the plugging device.

[0100] When opening the open end of the air filter element 4, hold the downward pressing handle 291 and the rotating handle 301 so that the locking hook device 2 is in the unlocked state ( Figure 17 ), the locked connection between the plugging device and the internal support 41 of the air filter element 4 is released, and the plugging device is lifted upward so that the plugging device is separated from the air filter element 4 to complete the opening.

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

Claims

1. A self-locking air filter outlet plugging device, characterized in that, Comprising: A plugging plate combination device (1) and a locking hook device (2); The plugging plate combination device (1) comprises: a plugging plate (11) and more than one air inlet pipe (12); The air inlet pipe (12) is arranged on the plugging plate (11); The locking hook device (2) comprises: a locking hook (22), a downward pressing handle (29), a moving column (25) and a spring (28); The moving column (25) is vertically arranged on the plugging plate (11), with a downward pressing handle (29) provided at its top and a locking hook (22) provided at its bottom; The downward pressing handle (29) is used to drive the moving column (25) so that the moving column (25) makes a reciprocating motion relative to the plugging plate (11); When the moving column (25) makes a reciprocating motion, it pushes the locking hook (22) to rotate, so that the locking hook (22) hooks or disengages from the internal support (41) of the air filter element (4), thereby enabling the plugging plate (11) to plug or open the open end of the air filter element (4); The spring (28) is arranged between the downward pressing handle (29) and the plugging plate (11), and keeps the locking hook (22) in a hooked state through its pre-tightening force.

2. The self-locking air filter outlet plugging device according to claim 1, wherein, The locking hook device (2) further comprises: a static column (21) and a guide rail (26); A plugging plate middle hole (111) is provided on the plugging plate (11); The guide rail (26) is of a cylindrical structure and is coaxially sleeved in the plugging plate middle hole (111), and its central hole serves as the axial track (262) of the guide rail (26); The moving column (25) is coaxially arranged in the axial track (262) of the guide rail (26) and makes a reciprocating motion along the axis of the guide rail (26); The static column (21) is arranged on the lower end face of the plugging 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 element (4), and the other end of the locking hook (22) is hinged to the bottom of the static column (21); the locking hook (22) rotates around the hinge point with the static column (21) as the moving column (25) makes a reciprocating motion; the locking body of the locking hook (22) is hinged to the bottom of 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 downward pressing handle (29).

3. The self-locking air filter outlet plugging device according to claim 2, wherein The top of the moving column (25) is provided with an external thread; The downward pressing handle (29) is provided with a threaded hole, which is in threaded cooperation with the external thread at the top of the moving column (25), so as to adjust the pre-tightening force of the spring (28).

4. The self-locking air filter outlet plugging device according to claim 2, wherein, The locking hook device (2) further comprises: a rotating handle (30); The rotating handle (30) is arranged at the upper part of the guide rail (26) and provides support for the reciprocating motion of the downward pressing handle (29).

5. The self-locking air filter outlet plugging device according to claim 4, wherein The downward pressing handle (29) is of a U-shaped structure and comprises: a vertical part A and two horizontal parts A; one horizontal part A of the downward pressing handle (29) is threadedly connected to the top of the moving column (25); The rotating handle (30) is of a U-shaped structure and comprises: 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 pressing handle (29) and the rotating handle (30) are misaligned.

6. The self-locking air filter outlet plugging device according to claim 5, wherein, A U-shaped connecting piece is provided on the horizontal part B of the rotating handle (30) that is rotatably connected to the guide rail (26); 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 a radial rail (263) of the guide rail (26). The U-shaped connecting piece of the rotating handle (30) is rotatably connected to the radial rail (263) of the guide rail (26).

7. The self-locking air filter outlet plugging device according to claim 2, wherein, The locking hook device (2) further includes: two rocker arms (24). One ends of the two rocker arms (24) are respectively hinged to the bottom of the moving column (25), and the two rocker arms (24) are symmetrically arranged. The locking hook (22) is located between the two rocker arms (24), and the lock body of the locking hook (22) is hinged to the other ends of the two rocker arms (24).

8. The self-locking air filter outlet plugging device according to claim 2, wherein, The upper end face of the guide rail (26) is provided with a sealing gasket combination (27). The sealing gasket combination (27) is sleeved outside the moving column (25), and the sealing gasket combination (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 in interference fit with the moving column (25). The metal layer (272) is in clearance fit with the moving column (25). 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).

9. The self-locking air filter outlet plugging device according to any one of claims 1-8, characterized in that, The air outlet end (122) of each intake pipe (12) is provided with a dispersion head (14).

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

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