CN220090848U - Anti-blocking structure of pulse dust collector - Google Patents

Anti-blocking structure of pulse dust collector Download PDF

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Publication number
CN220090848U
CN220090848U CN202321489891.2U CN202321489891U CN220090848U CN 220090848 U CN220090848 U CN 220090848U CN 202321489891 U CN202321489891 U CN 202321489891U CN 220090848 U CN220090848 U CN 220090848U
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China
Prior art keywords
frame
filter
dust collector
sliding
pulse dust
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CN202321489891.2U
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Chinese (zh)
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崔娟
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Henan Xiehui Engineering Technology Co ltd
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Henan Xiehui Engineering Technology Co ltd
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
    • Y02A50/2351Atmospheric particulate matter [PM], e.g. carbon smoke microparticles, smog, aerosol particles, dust

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  • Filtering Of Dispersed Particles In Gases (AREA)

Abstract

The utility model belongs to the technical field of dust removing equipment, in particular to an anti-blocking structure of a pulse dust collector, which aims at solving the problems of easy blocking and poor filtering effect in the prior art, and provides a scheme that the anti-blocking structure comprises a pulse dust collector main body and a fan with an air inlet end communicated with the pulse dust collector main body, wherein the air inlet end of the fan is provided with a connecting frame in a penetrating way, and a supporting frame is bolted in the connecting frame; the opening at carriage top rotates and has cup jointed the filter bowl, the top of filter bowl and the inlet end intercommunication of fan, can filter the inhaled air through the filter bowl, inside the piece cotton wadding and various worms that block wherein got into the pulse dust collector main part, and can produce centrifugal force through the rotation of filter bowl, throw away its surperficial adnexed debris, utilize beating the subassembly and can beat the shock to the filter bowl, the attachment of clearance filter bowl surface, guarantee the patency of air, let the filter bowl can filter debris in real time, the reinforcing filter effect.

Description

Anti-blocking structure of pulse dust collector
Technical Field
The utility model relates to the technical field of dust removing equipment, in particular to an anti-blocking structure of a pulse dust collector.
Background
A pulse dust collector is a common industrial dust collector that can efficiently process dust in air, and for example, patent application No. 202123250132.4 discloses a pulse dust collector.
However, the above technical solution also has some problems, for example, the air sucked by the dust remover is often mixed with scraps, cotton wool, mosquitoes, insects and the like, and these impurities are easily stuck in the interior and the pipeline of the dust remover due to the large size or certain viscosity of the impurities in the process of being sucked into the dust remover, so that the dust remover is easily blocked, part of equipment workers can wrap the air inlet to filter the gauze, and the gauze is often covered by the impurities quickly, so that the air circulation is not smooth, the air inlet is affected, and the filtering effect is poor.
Disclosure of Invention
The utility model aims to solve the defects of easy blockage and poor filtering effect in the prior art, and provides an anti-blocking structure of a pulse dust collector.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
the anti-blocking structure of the pulse dust collector comprises a pulse dust collector main body and a fan, wherein the fan is communicated with the air inlet end of the pulse dust collector main body, the air inlet end of the fan is provided with a connecting frame in a penetrating manner, and a supporting frame is bolted in the connecting frame;
the opening at the top of the supporting frame is rotationally sleeved with a filter cup, the top end of the filter cup is communicated with the air inlet end of the fan, the filter cup is rotationally sleeved with the fan, the opening at the left side of the connecting frame is bolted with a speed reducing motor, the output end of the speed reducing motor is bolted with a rotating rod, the right end of the rotating rod is bolted with a main bevel gear, teeth of the main bevel gear are meshed with auxiliary bevel gears, and the axle center of the auxiliary bevel gear is bolted with the top end of the surface of the filter cup;
the sliding hole on the left side inside the supporting frame is slidably connected with a knocking component, the surface of the rotating rod is bolted with a transmission mechanism, the transmission mechanism is hinged with the knocking component, the speed reducing motor can drive a main conical gear to rotate through the rotating rod, the main conical gear can drive a filter cup to rotate through a secondary conical gear, and the filter cup can be used for filtering the entering air; the reducing motor can drive the transmission mechanism to rotate through the rotating rod, and the transmission mechanism knocks and vibrates the filter cup through the knocking component; the filter cup can filter inhaled air, the chip cotton batting and various insects in the filter cup are prevented from entering the pulse dust collector main body, centrifugal force can be generated through rotation of the filter cup, impurities attached to the surface of the filter cup can be thrown away, the knocking component is utilized to knock and shake the filter cup, the attachments on the surface of the filter cup are cleaned, the smoothness of the air is guaranteed, the filter cup can filter the impurities in real time, and the filtering effect is enhanced.
Preferably, the transmission mechanism comprises an eccentric wheel, a sliding frame and a hinging rod;
the quantity of eccentric wheels is two, and two eccentric wheels all bolt with the bull stick, the bottom of eccentric wheel and the top sliding connection of balladeur train, the hole at balladeur train top is articulated with the inside of linking frame, the bottom of balladeur train is articulated with the right-hand member of articulated lever, drive mechanism still include with articulated lever articulated drive assembly.
Further, the bull stick can drive two eccentric wheels and rotate, the top of left side eccentric wheel axle center department and the bottom of right side eccentric wheel axle center department all bolt with the surface of bull stick, the bull stick drives two eccentric wheels rotation in-process, left eccentric wheel upwards moves, the eccentric wheel on right side moves simultaneously downwards, when left eccentric wheel moves downwards, the eccentric wheel on right side upwards moves so reciprocally, two eccentric wheels can drive the balladeur train and rotate positively and negatively, the balladeur train passes through the bearing and rotates the setting with the linking frame, guarantee balladeur train pivoted stationarity, the balladeur train can drive articulated pole and move about.
Preferably, the transmission assembly comprises a transmission rod and a sliding sleeve;
the left end of articulated pole is articulated with the top of transfer line, and the hole of transfer line rear side is articulated with the inside of connecting frame, the bottom on transfer line surface and the inside sliding connection of sliding sleeve, and the rear side of sliding sleeve articulates with the left end on striking subassembly surface.
Further, the articulated rod can drive the transmission rod to rotate positively and negatively, the transmission rod is arranged in a rotating mode through the bearing and the connecting frame, the rotating stability of the transmission rod is guaranteed, the transmission rod can slide in the sliding sleeve in the rotating process of the transmission rod and drive the sliding sleeve to move left and right, and the sliding sleeve can drive the knocking assembly to move left and right.
Preferably, the sliding frame comprises a T-shaped frame and pulleys which are rotationally connected with two ends of the top of the T-shaped frame, the top of each pulley is in sliding connection with the bottom of the eccentric wheel, and holes in the rear side of the T-shaped frame are hinged with the inside of the connecting frame.
Further, in the rotation process of the eccentric wheel, the pulley is in sliding connection with the sliding frame, friction between the eccentric wheel and the sliding frame is reduced, transmission of the structure is facilitated, the T-shaped frame is rotatably arranged with the connecting frame through the bearing, and the rotation stability of the T-shaped frame is guaranteed.
Preferably, the filter cup comprises a cup body and a filter sleeve bonded with the bottom end opening of the cup body, the cup body is communicated with the fan, and the filter sleeve is positioned at the inner side of the supporting frame.
Further, the cup body is rotatably arranged with the fan through the bearing, so that the cup body can conveniently rotate, the bottom end of the surface of the cup body is of an opening structure, the filter sleeve is sleeved on the cup body, and air can be filtered through the filter sleeve.
Preferably, the knocking assembly comprises a connecting rod, a connecting frame bolted to the right end of the connecting rod and a knocking wheel rotatably connected inside the connecting frame, and the surface of the connecting rod is slidably connected with the sliding hole of the supporting frame.
Further, the sliding sleeve is hinged with the connecting rod, the sliding sleeve can drive the connecting rod to move left and right, transmission of the structure is facilitated, the connecting rod is arranged in a sliding mode through the sliding rail and the supporting frame, the connecting rod is guided, the connecting rod can move left and right stably, the connecting rod can drive the connecting frame to move left and right, the connecting frame can drive the knocking wheel to move, and friction is reduced by rotation after the knocking wheel is contacted with the filtering cup.
The beneficial effects are that:
1. the speed reducing motor can drive the main bevel gear to rotate through the rotating rod, the main bevel gear can drive the filter cup to rotate through the auxiliary bevel gear, and the filter cup can be used for filtering the entering air;
2. the reducing motor can drive the transmission mechanism to rotate through the rotating rod, and the transmission mechanism knocks and vibrates the filter cup through the knocking component;
in the utility model, the following components are added: the filter cup can filter inhaled air, the chip cotton batting and various insects in the filter cup are prevented from entering the pulse dust collector main body, centrifugal force can be generated through rotation of the filter cup, impurities attached to the surface of the filter cup can be thrown away, the knocking component is utilized to knock and shake the filter cup, the attachments on the surface of the filter cup are cleaned, the smoothness of the air is guaranteed, the filter cup can filter the impurities in real time, and the filtering effect is enhanced.
Drawings
FIG. 1 is a schematic diagram of an anti-blocking structure of a pulse dust collector according to the present utility model;
FIG. 2 is a schematic diagram of a driving mechanism of an anti-blocking structure of a pulse dust collector according to the present utility model;
FIG. 3 is a schematic rear view of a knocking assembly with an anti-blocking structure of a pulse dust collector according to the present utility model;
fig. 4 is a schematic diagram of an eccentric wheel perspective structure of an anti-blocking structure of a pulse dust collector according to the present utility model.
In the figure: 1. a pulse dust collector body; 2. a transmission mechanism; 21. an eccentric wheel; 22. a carriage; 23. a hinge rod; 24. a transmission rod; 25. a sliding sleeve; 3. a blower; 4. a connection frame; 5. a support frame; 6. a filter cup; 7. a speed reducing motor; 8. a rotating rod; 9. a main bevel gear; 10. a secondary bevel gear; 11. the assembly is knocked.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.
Example 1
Referring to fig. 1-4, an anti-blocking structure of a pulse dust collector comprises a pulse dust collector main body 1 and a fan 3 communicated with the air inlet end of the pulse dust collector main body 1, wherein a connecting frame 4 is arranged at the air inlet end of the fan 3 in a penetrating manner, and a supporting frame 5 is bolted in the connecting frame 4;
the opening at the top of the supporting frame 5 is rotatably sleeved with a filter cup 6, the top end of the filter cup 6 is communicated with the air inlet end of the fan 3, the filter cup 6 is rotatably sleeved with the fan 3, the opening at the left side of the connecting frame 4 is bolted with a gear motor 7, the output end of the gear motor 7 is bolted with a rotating rod 8, the right end of the rotating rod 8 is bolted with a main bevel gear 9, teeth of the main bevel gear 9 are meshed with a secondary bevel gear 10, and the axis of the secondary bevel gear 10 is bolted with the top end of the surface of the filter cup 6;
the inside left slide hole sliding connection of braced frame 5 has the subassembly 11 of beating, the surface bolt of bull stick 8 has drive mechanism 2, drive mechanism 2 is articulated with the subassembly 11 of beating, pulse dust collector main part 1 adopts the conventional pulse dust collector in market, fan 3 inhales the air through filter bowl 6, debris in the air is filtered by filter bowl 6 blocking, switch-on gear motor 7's power, gear motor 7 can drive bull stick 8 rotation, bull stick 8 rotates the setting through bearing and connecting frame 4, guarantee bull stick 8 pivoted stationarity, bull stick 8 can drive main cone gear 9 rotation, main cone gear 9 can drive vice cone gear 10 rotation, vice cone gear 10 can drive filter bowl 6 rotation, filter bowl 6 rotates through bearing and braced frame 5 rotation setting, guarantee filter bowl 6 pivoted stationarity, filter bowl 6 utilizes the rotation to produce centrifugal force, under the impurity, bull stick 8 can drive mechanism 2 rotation, drive subassembly 11 left and right sides and remove, the in-and-left side motion process can be continuous the filter bowl 6 of beating, guarantee filter bowl 6 is beaten through the bearing and connecting frame 4 rotation, guarantee that filter bowl 6 pivoted stationarity can drive filter bowl 6, filter bowl 6 can be driven the filter bowl 6, the filter effect can be carried out the filter bowl is inhaled to the filter bowl 6, the filter debris through the filter bowl is carried out to the filter bowl 6, the filter effect can be carried out the filter bowl is inhaled to the filter cup is clear up to the filter debris through the filter bowl 6, the filter bowl is clear up, the filter cup is can be carried out the filter effect is difficult to filter the filter bowl is inside the filter cup is convenient to filter cup is difficult to filter the filter cup is has the filter cup 6, the filter debris is has the filter effect is convenient to filter life-down to filter cup's 6, the filter life-down is can is clean the filter life.
In the utility model, the transmission mechanism 2 comprises an eccentric wheel 21, a sliding frame 22 and a hinging rod 23;
the number of the eccentric wheels 21 is two, the two eccentric wheels 21 are both bolted with the rotating rod 8, the bottom of the eccentric wheels 21 is in sliding connection with the top end of the sliding frame 22, a hole at the top of the sliding frame 22 is hinged with the inside of the connecting frame 4, the bottom end of the sliding frame 22 is hinged with the right end of the hinging rod 23, the transmission mechanism 2 further comprises a transmission component hinged with the hinging rod 23, the rotating rod 8 can drive the two eccentric wheels 21 to rotate, the top end at the axis of the left eccentric wheel 21 and the bottom end at the axis of the right eccentric wheel 21 are both bolted with the surface of the rotating rod 8, the rotating rod 8 drives the two eccentric wheels 21 to rotate, the left eccentric wheel 21 moves upwards, the right eccentric wheel 21 moves downwards at the same time, when the left eccentric wheel 21 moves downwards, the right eccentric wheel 21 moves upwards, and reciprocates in this way, the two eccentric wheels 21 can drive the sliding frame 22 to rotate positively and negatively, the sliding frame 22 is arranged through a bearing and the connecting frame 4 to ensure the rotating stability, and the sliding frame 22 can drive the hinging rod 23 to move leftwards.
In the utility model, the transmission assembly comprises a transmission rod 24 and a sliding sleeve 25;
the left end of articulated rod 23 is articulated with the top of transfer line 24, the hole of transfer line 24 rear side is articulated with the inside of connecting frame 4, the bottom on transfer line 24 surface is articulated with the inside sliding connection of sliding sleeve 25, the rear side of sliding sleeve 25 is articulated with the left end on the surface of beating subassembly 11, articulated rod 23 can drive transfer line 24 positive and negative rotation, transfer line 24 passes through the bearing and rotates the setting with connecting frame 4, guarantee transfer line 24 pivoted stationarity, transfer line 24 rotates the in-process and can slide and drive sliding sleeve 25 left and right movement in the inside of sliding sleeve 25, sliding sleeve 25 can drive to beat subassembly 11 and control the removal.
According to the utility model, the sliding frame 22 comprises the T-shaped frame and pulleys which are rotatably connected with two ends of the top of the T-shaped frame, the top of each pulley is slidably connected with the bottom of the eccentric wheel 21, a hole on the rear side of the T-shaped frame is hinged with the inside of the connecting frame 4, the eccentric wheel 21 is slidably connected with the sliding frame 22 through the pulleys in the rotating process, friction between the eccentric wheel 21 and the sliding frame 22 is reduced, the transmission of the structure is facilitated, and the T-shaped frame is rotatably arranged with the connecting frame 4 through a bearing, so that the rotating stability of the T-shaped frame is ensured.
In the utility model, the filter cup 6 comprises a cup body and a filter sleeve bonded with the bottom end opening of the cup body, the cup body is communicated with the fan 3, the filter sleeve is positioned on the inner side of the supporting frame 5, the cup body is rotatably arranged with the fan 3 through a bearing, the rotation of the cup body is facilitated, the bottom end of the cup body surface is of an opening structure, the filter sleeve is sleeved on the cup body, and air can be filtered by utilizing the filter sleeve.
In the utility model, the knocking component 11 comprises a connecting rod, a connecting frame which is bolted at the right end of the connecting rod and a knocking wheel which is rotatably connected inside the connecting frame, the surface of the connecting rod is in sliding connection with a sliding hole of the supporting frame 5, the sliding sleeve 25 is hinged with the connecting rod, the sliding sleeve 25 can drive the connecting rod to move left and right, the structure is convenient to drive, the connecting rod is arranged in a sliding way with the supporting frame 5 through a sliding rail, the connecting rod is guided, the connecting rod can stably move left and right, the connecting rod can drive the connecting frame to move left and right, the connecting frame can drive the knocking wheel to move, and friction is reduced by rotation after the knocking wheel is contacted with the filtering cup 6.
Example two
This embodiment differs from embodiment 1 in that: the eccentric wheel 21, the sliding frame 22, the hinging rod 23 and the transmission rod 24 are replaced by a connecting frame which is in sliding connection with a cam and a sliding groove on the surface of the cam and an L-shaped frame which is in sliding connection with the bottom end of the connecting frame, the bottom end of the surface of the L-shaped frame is in sliding connection with the sliding sleeve 25, the transmission of the structure is facilitated, but a sliding block sliding groove structure is adopted between the cam and the connecting frame, the connecting position between the top end of the connecting frame and the sliding block is thinner, the connection is fragile, and the long-term movement is easy to break, so that the utility model is preferably the eccentric wheel 21, the sliding frame 22, the hinging rod 23 and the transmission rod 24.
Working principle: the pulse dust collector main body 1 adopts a conventional pulse dust collector on the market, the fan 3 sucks air through the filter bowl 6, the opening on the right side of the connecting frame 4 is communicated with a pipeline to be filtered, impurities in the air are blocked and filtered by the filter bowl 6, the power supply of the speed reducing motor 7 is connected, the speed reducing motor 7 can drive the rotating rod 8 to rotate, the rotating rod 8 is rotatably arranged with the connecting frame 4 through a bearing, the rotating stability of the rotating rod 8 is guaranteed, the rotating rod 8 can drive the main bevel gear 9 to rotate, the main bevel gear 9 can drive the auxiliary bevel gear 10 to rotate, the auxiliary bevel gear 10 can drive the filter bowl 6 to rotate, the filter bowl 6 is rotatably arranged with the supporting frame 5 through a bearing, the stability of the rotation of the filter bowl 6 is guaranteed, the centrifugal force is generated by rotation of the filter bowl 6, the impurities are thrown down, the bottom end of the axle center of the rotating rod 8 and the surface of the rotating rod 8 are both connected, the rotating rod 8 drives the two eccentric wheels 21 to rotate, in the process of the rotating rod 21 on the left side, the eccentric wheels 21 can drive the eccentric wheels 21 to move upwards, simultaneously the eccentric wheels 21 on the right side 21 are driven to move downwards, the eccentric wheels 21 on the left side 22 are driven to rotate, the sliding frame 24 can drive the eccentric wheels 22 to rotate, the sliding support 22 is rotatably arranged on the left side 22 to rotate, and the sliding frame 24 can drive the sliding frame 24 to rotate, and the sliding support 22 to rotate the sliding frame 24 to rotate upwards through the sliding frame 24 to rotate, and the sliding support the sliding frame 24 can rotate, and the sliding frame 24 can rotate and the sliding frame 24 to rotate and can rotate. The filter cup 6 can be constantly knocked in the left-right movement process of the knocking assembly 11, and the intractable impurities on the filter cup 6 are cleaned, so that the smoothness of the filter cup 6 is ensured.
The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.

Claims (6)

1. The anti-blocking structure of the pulse dust collector comprises a pulse dust collector main body (1) and a fan (3) communicated with the air inlet end of the pulse dust collector main body (1), and is characterized in that the air inlet end of the fan (3) is provided with a connecting frame (4) in a penetrating manner, and a supporting frame (5) is bolted in the connecting frame (4);
the opening at the top of the supporting frame (5) is rotationally sleeved with a filter cup (6), the top end of the filter cup (6) is communicated with the air inlet end of the fan (3), the filter cup (6) is rotationally sleeved with the fan (3), the opening at the left side of the connecting frame (4) is bolted with a gear motor (7), the output end of the gear motor (7) is bolted with a rotating rod (8), the right end of the rotating rod (8) is bolted with a main bevel gear (9), teeth of the main bevel gear (9) are meshed with a secondary bevel gear (10), and the axle center of the secondary bevel gear (10) is bolted with the top end of the surface of the filter cup (6);
the sliding hole on the left side inside the supporting frame (5) is connected with a knocking component (11) in a sliding mode, the surface of the rotating rod (8) is connected with a transmission mechanism (2) in a bolting mode, and the transmission mechanism (2) is hinged to the knocking component (11).
2. An anti-blocking structure of a pulse dust collector according to claim 1, characterized in that the transmission mechanism (2) comprises an eccentric wheel (21), a sliding frame (22) and a hinging rod (23);
the number of the eccentric wheels (21) is two, the two eccentric wheels (21) are both in bolt connection with the rotating rod (8), the bottom of the eccentric wheels (21) is in sliding connection with the top end of the sliding frame (22), a hole at the top of the sliding frame (22) is hinged with the inside of the connecting frame (4), the bottom end of the sliding frame (22) is hinged with the right end of the hinging rod (23), and the transmission mechanism (2) further comprises a transmission component hinged with the hinging rod (23).
3. An anti-blocking structure of a pulse dust collector according to claim 2, characterized in that the transmission assembly comprises a transmission rod (24) and a sliding sleeve (25);
the left end of articulated pole (23) is articulated with the top of transfer line (24), and the hole of transfer line (24) rear side is articulated with the inside of connecting frame (4), and the bottom on transfer line (24) surface is with the inside sliding connection of sliding sleeve (25), and the rear side of sliding sleeve (25) is articulated with the left end on striking subassembly (11) surface.
4. The anti-blocking structure of the pulse dust collector according to claim 2, wherein the sliding frame (22) comprises a T-shaped frame and pulleys rotatably connected with two ends of the top of the T-shaped frame, the top of the pulleys are slidably connected with the bottom of the eccentric wheel (21), and a hole on the rear side of the T-shaped frame is hinged with the inside of the connecting frame (4).
5. The anti-blocking structure of the pulse dust collector according to claim 1, wherein the filter cup (6) comprises a cup body and a filter sleeve bonded with an opening at the bottom end of the surface of the cup body, the cup body is communicated with the fan (3), and the filter sleeve is positioned on the inner side of the supporting frame (5).
6. The anti-blocking structure of the pulse dust collector according to claim 1, wherein the knocking component (11) comprises a connecting rod, a connecting frame bolted to the right end of the connecting rod and a knocking wheel rotatably connected inside the connecting frame, and the surface of the connecting rod is slidably connected with the sliding hole of the supporting frame (5).
CN202321489891.2U 2023-06-13 2023-06-13 Anti-blocking structure of pulse dust collector Active CN220090848U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202321489891.2U CN220090848U (en) 2023-06-13 2023-06-13 Anti-blocking structure of pulse dust collector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202321489891.2U CN220090848U (en) 2023-06-13 2023-06-13 Anti-blocking structure of pulse dust collector

Publications (1)

Publication Number Publication Date
CN220090848U true CN220090848U (en) 2023-11-28

Family

ID=88870671

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202321489891.2U Active CN220090848U (en) 2023-06-13 2023-06-13 Anti-blocking structure of pulse dust collector

Country Status (1)

Country Link
CN (1) CN220090848U (en)

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