Electrostatic dust collection device for thermal power plant

Abstract

The embodiment of the invention provides an electrostatic dust removal device for a thermal power plant. The electrostatic dust removal device comprises a dust removal box body with an air inlet and an air outlet, a positive electrode dust removal plate, a fan, a filtering mechanism and an adsorption mechanism, the positive dedusting plate is fixedly connected to the top wall in the dedusting box body; the filtering mechanism is movably connected to the inner side wall of the dust removal box body and is close to the air inlet; the adsorption mechanism is detachably inserted into the dust removal box body along the side wall of the dust removal box body; the adsorption mechanism comprises a negative electrode dust removal plate corresponding to the positive electrode dust removal plate; and the fan is arranged in the dust removal box body and is used for discharging external air between the positive electrode dust removal plate and the negative electrode dust removal plate to realize electrostatic dust removal. By means of the adsorption mechanism, the equipment can automatically clean dust and impurities on the negative electrode dust removal plate, the situation that workers frequently clean or replace the negative electrode dust removal plate is avoided, and the labor amount of the workers is reduced; the filter screen can be automatically cleaned through the filter mechanism, so that the filter screen is prevented from being blocked, and the dust removal efficiency of the electrostatic dust removal box is ensured.

Description

Technical Field

[0001] The disclosed embodiments belong to the technical field of electrostatic precipitators, and specifically relate to an electrostatic precipitator device for a thermal power plant. Background Art

[0002] Generally, some electrostatic dust removal boxes are installed in thermal power plants. The inside of the electrostatic dust removal box will use the air inlet pipe of the fan to suck the external air into the inside of the electrostatic dust removal box through the filter net, and then discharge the air between the two dust removal plates through the air outlet pipe of the fan. The dust removal plates are then energized by the battery, so that the dust in the air is sucked onto the negative electrode dust removal plate, thereby achieving the dust removal effect.

[0003] At present, when the traditional electrostatic precipitator of a thermal power plant is in use, due to the large amount of dust-containing gas generated by the thermal power plant, impurities will remain on the negative plate when the electrostatic precipitator is used for dust removal. Therefore, the staff needs to clean or replace the negative plate frequently, which is labor-intensive. At the same time, due to the long-term passage of dust-containing air on the filter net, a layer of dust will adhere to the filter net, and the filter holes on the filter net will be clogged with dust, which will not only affect the filtration of the filter net, but also affect the air entering the electrostatic precipitator box, thereby affecting the dust removal efficiency of the electrostatic precipitator box.

[0004] In view of the above problems, it is necessary to propose an electrostatic precipitator for a thermal power plant which has a reasonable design and can effectively solve the above problems. Summary of the invention

[0005] The embodiments of the present disclosure aim to solve at least one of the technical problems existing in the prior art and provide an electrostatic precipitator for a thermal power plant.

[0006] The embodiment of the present disclosure provides an electrostatic dust removal device for a thermal power plant, comprising a dust removal box having an air inlet and an air outlet, a positive dust removal plate, a fan, a filtering mechanism and an adsorption mechanism;

[0007] The positive electrode dust removal plate is fixedly connected to the top wall inside the dust removal box;

[0008] The filtering mechanism is movably connected to the inner wall of the dust removal box and is arranged close to the air inlet;

[0009] The adsorption mechanism is detachably inserted into the dust removal box along the side wall of the dust removal box; wherein the adsorption mechanism comprises a negative electrode dust removal plate, and the negative electrode dust removal plate corresponds to the positive electrode dust removal plate;

[0010] The fan is arranged in the dust removal box and is used to discharge external air between the positive dust removal plate and the negative dust removal plate to achieve electrostatic dust removal.

[0011] Optionally, the adsorption mechanism further includes a base plate, a bottom plate, a socket and a plurality of pulleys;

[0012] The first end of the substrate is fixedly connected to the socket, and a plurality of negative electrode dust removal plates are plugged into the socket;

[0013] The second end of the base plate is fixedly connected to the bottom plate, and a plurality of pulleys are arranged at the lower end of the bottom plate; wherein,

[0014] The adsorption mechanism is slidably inserted into the dust removal box through the pulley.

[0015] Optionally, the adsorption mechanism further includes a convex plate;

[0016] The convex plate is arranged at the bottom of the second end of the base plate, and the dust removal box is provided with an opening corresponding to the convex plate. When electrostatic dust removal is performed, the convex plate is clamped in the opening.

[0017] Optionally, the base plate and the convex plate are integrally formed.

[0018] Optionally, the adsorption mechanism further includes a handle, and the handle is disposed on the substrate.

[0019] Optionally, a side panel is provided in the dust removal box, and the side panel is provided with a mounting groove;

[0020] The filtering mechanism comprises a driving assembly and a filtering net, and the filtering net is movably arranged in the mounting groove;

[0021] The driving assembly drives the filter screen to reciprocate in the installation groove.

[0022] Optionally, the filtering mechanism further includes a plurality of first elastic members, which are spaced apart on the outer side wall of the filter net, and some of the first elastic members are elastically connected to the inner side wall of the mounting groove.

[0023] Optionally, the driving assembly includes a transmission assembly, and two ends of the transmission assembly are respectively connected to the fan and the filter.

[0024] Optionally, the side plate is provided with a slide groove connected to the mounting groove;

[0025] The transmission assembly includes a toothed plate, a sector gear, a slider, a rotating rod and a second elastic member;

[0026] The tooth plate is arranged on the filter screen, and the upper end of the tooth plate is meshingly connected with the sector gear;

[0027] The rotating rod is inserted into the inner wall of the sector gear;

[0028] The lower end of the tooth plate is fixedly connected to the sliding block, and one side of the sliding block is fixedly connected to the second elastic member.

[0029] Optionally, the transmission assembly further includes a worm gear, a worm, a drive rod and a drive impeller;

[0030] The worm wheel is sleeved on the outer wall of the rotating rod, the lower end of the worm wheel is meshedly connected with the worm, the driving rod is inserted into the inner wall of the worm, and the driving impeller is sleeved on the middle part of the outer wall of the driving rod.

[0031] The electrostatic dust removal device for a thermal power plant of the disclosed embodiment is provided with an adsorption mechanism, which is detachably inserted into the dust removal box along the side wall of the dust removal box. When there is a lot of dust on the negative dust removal plate, the adsorption mechanism is pulled out to clean the dust and impurities on the negative dust removal plate. After cleaning, the adsorption mechanism is reinserted into the dust removal box to automatically clean the dust and impurities on the negative dust removal plate, thereby avoiding the staff from frequently cleaning or replacing the negative dust removal plate and reducing the workload of the staff; by providing a filtering mechanism movably connected to the inner wall of the dust removal box and arranged close to the air inlet, the equipment can automatically clean the filter to avoid clogging of the filter and affecting the air entering the electrostatic dust removal box, thereby ensuring the dust removal efficiency of the electrostatic dust removal box. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic cross-sectional view of a three-dimensional structure of an electrostatic precipitator for a thermal power plant according to one embodiment of the present disclosure;

[0033] Figure 2 It is a structural schematic diagram of an adsorption mechanism of another embodiment of the present disclosure;

[0034] Figure 3 It is a structural schematic diagram of a filtering mechanism of another embodiment of the disclosed embodiment;

[0035] Figure 4 It is a side view of the three-dimensional structure of an electrostatic precipitator for a thermal power plant according to one embodiment of the present disclosure;

[0036] Figure 5 It is a schematic diagram of the three-dimensional explosion structure of an electrostatic precipitator in a thermal power plant according to one embodiment of the present disclosure. DETAILED DESCRIPTION

[0037] In order to enable those skilled in the art to better understand the technical solutions of the embodiments of the present disclosure, the embodiments of the present disclosure are further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0038] like Figure 1 , Figure 3 and Figure 4As shown, an embodiment of the present disclosure provides an electrostatic precipitator for a thermal power plant, comprising a dust removal box 1 having an air inlet 9 and an air outlet 2, a positive electrode dust removal plate 5, a filtering mechanism 8 and an adsorption mechanism 4.

[0039] The positive electrode dust removal plate 5 is fixedly connected to the top wall inside the dust removal box 1 .

[0040] The filter mechanism 8 is movably connected to the inner wall of the dust removal box 1 and is arranged close to the air inlet 2 .

[0041] The adsorption mechanism 4 is detachably inserted into the dust removal box 1 along the side wall of the dust removal box 1; wherein the adsorption mechanism 4 includes a negative dust removal plate 47, and the negative dust removal plate 47 corresponds to the positive dust removal plate 5 to realize electrostatic dust removal.

[0042] like Figure 1 As shown, the device further comprises a bracket 3, which is connected to the lower end of the dust removal box 1 to support the dust removal box 1.

[0043] Specifically, when the electrostatic dust removal device is used in a thermal power plant, external air enters the interior of the dust removal box 1 through the air inlet 9, and then the air is discharged to between the positive dust removal plate 5 and the negative dust removal plate 47 through the fan. The dust removal plate is energized by an external battery, and the dust in the air will be sucked onto the negative dust removal plate 47. When there is a lot of dust on the negative dust removal plate 47, the adsorption mechanism 4 is pulled out from the front end of the dust removal box 1 to clean the dust and impurities on the negative dust removal plate 47. After cleaning, the negative dust removal plate 47 is put back to its original position, and then the adsorption mechanism 4 is pushed back to the front end of the dust removal box 1 for continued use, thereby realizing the function of automatically cleaning the dust and impurities on the negative dust removal plate.

[0044] When the electrostatic dust removal device is used in a thermal power plant, external air enters the interior of the dust removal box 1 through the air inlet 9, and the air first passes through the filter mechanism 8 for preliminary filtration to filter out large particles of dust impurities in the air, and then the air enters between the positive dust removal plate 5 and the negative dust removal plate 47 for electrostatic dust removal. When there are too many dust impurities on the filter mechanism 8, the filter mechanism 8 is moved in the dust removal box 1 to clean the dust impurities on the filter mechanism 8, thereby realizing the function of automatically cleaning the filter net.

[0045] The electrostatic dust removal device for a thermal power plant of the disclosed embodiment is provided with an adsorption mechanism, which is detachably inserted into the dust removal box along the side wall of the dust removal box. When there is a lot of dust on the negative dust removal plate, the adsorption mechanism is pulled out to clean the dust and impurities on the negative dust removal plate. After cleaning, the adsorption mechanism is reinserted into the dust removal box to automatically clean the dust and impurities on the negative dust removal plate, thereby avoiding the staff from frequently cleaning or replacing the negative dust removal plate and reducing the workload of the staff; by providing a filtering mechanism movably connected to the inner wall of the dust removal box and arranged close to the air inlet, the equipment can automatically clean the filter to avoid clogging of the filter and affecting the air entering the electrostatic dust removal box, thereby ensuring the dust removal efficiency of the electrostatic dust removal box.

[0046] For example, Figure 2 As shown, the adsorption mechanism 4 further includes a base plate 41 , a bottom plate 44 , a socket 46 and a plurality of pulleys 45 .

[0047] A socket 46 is fixedly connected to the first end of the base plate 41 , and a plurality of negative electrode dust removal plates 47 are inserted into the socket 46 .

[0048] The second end of the base plate 41 is fixedly connected to a bottom plate 44, and a plurality of pulleys 45 are arranged at the lower end of the bottom plate 44. The adsorption mechanism 4 is slidably inserted into the dust removal box 1 through the pulleys 45.

[0049] Specifically, the rear end of the substrate 41 is detachably connected to one side of the front end of the dust removal box 1, a bottom plate 44 is fixedly connected to the bottom of the rear end of the substrate 41, pulleys 45 are fixedly connected around the lower end of the bottom plate 44, a socket 46 is fixedly connected to the upper end of the bottom plate 44, and a negative dust removal plate 47 is inserted into the inner wall of the socket 46.

[0050] For example, Figure 2 As shown, the adsorption mechanism 4 further includes a convex plate 43. The convex plate 43 is arranged at the bottom of the second end of the substrate 41, and the dust removal box 1 is provided with an opening corresponding to the convex plate 43, and the convex plate 43 supports the substrate 41. When performing electrostatic dust removal, the convex plate 43 is clamped in the opening to limit the substrate 41 to prevent the negative electrode dust removal plate 47 on the substrate 41 from shaking during electrostatic adsorption.

[0051] For example, Figure 2 As shown, in this embodiment, the base plate 41 and the protruding plate 43 are integrally formed, so that the connection between the base plate 41 and the protruding plate 43 is more secure.

[0052] For example, Figure 2 As shown, the adsorption mechanism 4 further includes a handle 42 , and the handle 42 is disposed on the substrate 41 .

[0053] Specifically, the front ends of the substrate 41 are fixedly connected to the rear ends of the handle 42, so that the substrate 41 and the negative electrode dust removal plate 47 on the substrate 41 can be pulled out through the handle 42. By providing the handle 42, the adsorption mechanism 4 can be pulled out more conveniently.

[0054] For example, Figure 1 As shown, the dust removal box body 1 is provided with a side plate 7, as shown in FIG. Figure 3 As shown, the side plate 7 is provided with a mounting groove 81 .

[0055] The filter mechanism 8 includes a driving assembly and a filter screen 82 , and the filter screen 82 is movably disposed in the mounting groove 81 .

[0056] The driving assembly drives the filter screen 82 to reciprocate in the installation slot 81 .

[0057] In this embodiment, the filter 82 is driven to move back and forth in the installation groove 81 by the driving component, so that the dust on the filter 82 can be knocked and cleaned. The dust attached to the filter 82 can be shaken off during vibration, and the filter 82 can be cleaned. This not only ensures the normal filtration of the filter 82, but also allows the outside air to enter the interior of the dust removal box 1 for dust removal, thereby avoiding dust clogging the filter holes and increasing the air circulation speed.

[0058] For example, Figure 3 As shown, the filter mechanism 8 further includes a plurality of first elastic members 83, which are arranged at intervals on the outer side wall of the filter screen 82, and some of the first elastic members 83 are elastically connected to the inner side wall of the mounting groove 81. The filter screen 82 can be buffered by providing the first elastic members 83 to prevent the filter screen 82 from being damaged during cleaning. In this embodiment, the first elastic member 83 can be a spring.

[0059] Exemplarily, the driving assembly includes a transmission assembly, and two ends of the transmission assembly are respectively connected to the fan 6 and the filter 82.

[0060] Specifically, Figure 3 As shown, the side plate 7 is provided with a sliding groove 86 which is connected with the mounting groove 81 .

[0061] The transmission assembly includes a toothed plate 84 , a sector gear 85 , a slider 88 , a rotating rod 87 and a second elastic member 89 .

[0062] The tooth plate 84 is disposed on the filter screen 82 , and the upper end of the tooth plate 84 is meshedly connected with a sector gear 85 .

[0063] A rotating rod 87 is inserted into the inner wall of the sector gear 85 .

[0064] The lower end of the tooth plate 84 is fixedly connected with a slide block 88, and one side of the slide block 88 is fixedly connected with a second elastic member 89. The first elastic member 83 cooperates with the second elastic member 89 to buffer the filter screen 82 to prevent the filter screen 82 from being damaged during cleaning.

[0065] For example, Figure 3 As shown, the transmission assembly also includes a worm gear 810 , a worm 811 , a driving rod 812 and a driving impeller 813 .

[0066] A worm wheel 810 is sleeved on the outer wall of the rotating rod 87 , a worm 811 is meshedly connected to the lower end of the worm wheel 810 , a driving rod 812 is inserted into the inner wall of the worm 811 , and a driving impeller 813 is sleeved on the middle of the outer wall of the driving rod 812 .

[0067] Specifically, when external air enters the interior of the dust removal box 1 through the air inlet 9, the fan 6 is set to blow the driving impeller 813 to rotate, and the driving impeller 813 drives the driving rod 812 to rotate, and the driving rod 812 drives the worm 811 to rotate, and the worm 811 drives the worm wheel 810 to rotate, and the worm wheel 810 drives the rotating rod 87 to rotate, and the rotating rod 87 drives the fan gear 85 to rotate, and the fan gear 85 drives the tooth plate 84 to move, and the tooth plate 84 drives the filter screen 82 to move back and forth uninterruptedly inside the mounting groove 81, so that the dust on the filter screen 82 is knocked and cleaned, and the dust attached to the filter screen 82 can be shaken off during vibration, and the cleaning of the filter screen 82 can be completed, which not only ensures the normal filtration of the filter screen 82, but also allows the outside air to enter the interior of the dust removal box 1 for dust removal, avoids dust clogging the filter holes, and increases the air circulation speed.

[0068] like Figures 1 to 5 As shown, the working process of the electrostatic precipitator of a thermal power plant in the embodiment of the present disclosure is as follows:

[0069] First, the front ends of the substrate 41 are fixedly connected to the rear ends of the handle 42, so that the substrate 41 and the negative dust removal plate 47 on the substrate 41 can be pulled out through the handle 42. The lower ends of the substrate 41 are fixedly connected to the upper ends of the convex plate 43. The convex plate 43 supports the substrate 41. At the same time, the convex plate 43 can be stuck in the front end opening of the dust removal box 1 to limit the substrate 41 and prevent the negative dust removal plate 47 on the substrate 41 from shaking during electrostatic adsorption. The substrate 41 and the convex plate 43 are arranged in an integrated structure, and the integrated structure makes the connection between the substrate 41 and the convex plate 43 more secure.

[0070] In order to clean the dust on the filter 82 and prevent the dust from clogging the filter holes and affecting the air circulation and dust removal efficiency, the outer wall of the mounting groove 81 is embedded and connected with the inner wall of the side plate 7, and the inner wall of the mounting groove 81 is provided with a first elastic member 83 around the inner wall of the mounting groove 81. The first elastic member 83 is evenly arranged around the filter 82 to connect it with the mounting groove 81. A filter 82 is provided on one side of the first elastic member 83, and a plurality of filter holes are opened on the filter 82. A tooth plate 84 is fixedly connected to one side of the filter 82, and a fan-shaped gear 85 is meshed and connected at the upper end of the tooth plate 84. Slide grooves 86 are embedded and connected on both sides of the inner wall of the mounting groove 81. A rotating rod 87 is inserted into the inner wall of the gear 85, and a sliding block 88 is fixedly connected to the lower end of the tooth plate 84. The sliding block 88 is arranged between the two sliding grooves 86. A second elastic member 89 is fixedly connected to one side of the sliding block 88. The first elastic member 83 and the second elastic member 89 cooperate to buffer the filter screen 82 to prevent the filter screen 82 from being damaged during cleaning. A worm wheel 810 is sleeved on the outer wall of the rotating rod 87, and a worm 811 is meshingly connected to the lower end of the worm wheel 810. A driving rod 812 is inserted into the inner wall of the worm 811. The driving rod 812 is arranged in the middle of the inner wall of the dust removal box 1 and is rotatably connected thereto, and a driving impeller 813 is sleeved in the middle of the outer wall of the driving rod 812.

[0071] When external air enters the interior of the dust removal box 1 through the air inlet 9, the fan 6 is set to blow the driving impeller 813 to rotate, and the driving impeller 813 drives the driving rod 812 to rotate, and the driving rod 812 drives the worm 811 to rotate, and the worm 811 drives the worm gear 810 to rotate, and the worm gear 810 drives the rotating rod 87 to rotate, and the rotating rod 87 drives the fan gear 85 to rotate, and the fan gear 85 drives the tooth plate 84 to move, and the tooth plate 84 drives the filter screen 82 to move back and forth uninterruptedly inside the mounting groove 81, so that the dust on the filter screen 82 is knocked and cleaned, and the dust attached to the filter screen 82 can be shaken off during vibration, and the cleaning of the filter screen 82 can be completed, which not only ensures the normal filtration of the filter screen 82, but also allows the outside air to enter the interior of the dust removal box 1 for dust removal, avoids dust clogging the filter holes, and increases the air circulation speed.

[0072] Then, when the dust in the dust removal box 1 needs to be cleaned, the staff can pull the handle 42 to drive the substrate 41 and the convex plate 43, bottom plate 44, pulley 45, socket 46 and negative dust removal plate 47 on the substrate 41 to move forward, so that the negative dust removal plate 47 is separated from the positive dust removal plate 5, and then the staff removes the negative dust removal plate 47 from the socket 46.

[0073] Afterwards, the dust absorbed on the negative dust removal plate 47 will fall off, completing the dust cleaning work in the dust removal box 1. After cleaning, the staff can push the handle 42 to drive the substrate 41 and the components on the substrate 41 to move backward, so that the negative dust removal plate 47 is reinserted into the inner wall of the dust removal box 1. At this time, the negative dust removal plate 47 and the positive dust removal plate 5 are used together to remove dust from the air entering the dust removal box 1 again. A negative dust removal plate 47 is provided on the substrate 41, and a positive dust removal plate 5 is provided on one side of the negative dust removal plate 47. The arrangement of multiple pairs of negative dust removal plates 47 and positive dust removal plates 5 allows the dust-containing gas to form a gas vortex when passing through the dust removal box 1, thereby ensuring sufficient dust removal of the dust-containing gas.

[0074] Finally, the dust-removed gas can be discharged through the gas outlet 2.

[0075] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the embodiments of the present disclosure, but the embodiments of the present disclosure are not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the embodiments of the present disclosure, and these modifications and improvements are also considered to be within the protection scope of the embodiments of the present disclosure.

Claims

1. An electrostatic precipitator for a thermal power plant, characterized in that: It includes a dust removal box with an air inlet and an air outlet, a positive electrode dust removal plate, a fan, a filtering mechanism and an adsorption mechanism; The positive electrode dust removal plate is fixedly connected to the top wall inside the dust removal box; The filtering mechanism is movably connected to the inner wall of the dust removal box and is arranged close to the air inlet; The adsorption mechanism is detachably inserted into the dust removal box along the side wall of the dust removal box; wherein the adsorption mechanism comprises a negative electrode dust removal plate, and the negative electrode dust removal plate corresponds to the positive electrode dust removal plate; The fan is arranged in the dust removal box and is used to discharge external air between the positive dust removal plate and the negative dust removal plate to achieve electrostatic dust removal.

2. The electrostatic precipitator for a thermal power plant according to claim 1, characterized in that: The adsorption mechanism also includes a base plate, a bottom plate, a socket and a plurality of pulleys; The first end of the substrate is fixedly connected to the socket, and a plurality of negative electrode dust removal plates are plugged into the socket; The second end of the base plate is fixedly connected to the bottom plate, and a plurality of pulleys are arranged at the lower end of the bottom plate; wherein, The adsorption mechanism is slidably inserted into the dust removal box through the pulley.

3. The electrostatic precipitator for a thermal power plant according to claim 2, characterized in that: The adsorption mechanism also includes a convex plate; The convex plate is arranged at the bottom of the second end of the base plate, and the dust removal box is provided with an opening corresponding to the convex plate. When electrostatic dust removal is performed, the convex plate is clamped in the opening.

4. The electrostatic precipitator for a thermal power plant according to claim 3, characterized in that: The base plate and the convex plate are integrally formed.

5. The electrostatic precipitator for a thermal power plant according to claim 2, characterized in that: The adsorption mechanism further includes a handle, and the handle is arranged on the substrate.

6. The electrostatic precipitator for a thermal power plant according to claim 1, characterized in that: The dust removal box is provided with a side plate, and the side plate is provided with a mounting groove; The filtering mechanism comprises a driving assembly and a filtering net, and the filtering net is movably arranged in the mounting groove; The driving assembly drives the filter screen to reciprocate in the installation groove.

7. The electrostatic precipitator for a thermal power plant according to claim 6, characterized in that: The filtering mechanism further includes a plurality of first elastic members, which are spaced apart on the outer side wall of the filter screen, and some of the first elastic members are elastically connected to the inner side wall of the mounting groove.

8. The electrostatic precipitator for a thermal power plant according to claim 6, characterized in that: The driving assembly includes a transmission assembly, and two ends of the transmission assembly are respectively connected to the fan and the filter.

9. The electrostatic precipitator for a thermal power plant according to claim 8, characterized in that: The side plate is provided with a slide groove connected to the mounting groove; The transmission assembly includes a toothed plate, a sector gear, a slider, a rotating rod and a second elastic member; The tooth plate is arranged on the filter screen, and the upper end of the tooth plate is meshingly connected with the sector gear; The rotating rod is inserted into the inner wall of the sector gear; The lower end of the tooth plate is fixedly connected to the sliding block, and one side of the sliding block is fixedly connected to the second elastic member.

10. The electrostatic precipitator for a thermal power plant according to claim 9, characterized in that: The transmission assembly also includes a worm gear, a worm, a drive rod and a drive impeller; The worm wheel is sleeved on the outer wall of the rotating rod, the lower end of the worm wheel is meshedly connected with the worm, the driving rod is inserted into the inner wall of the worm, and the driving impeller is sleeved on the middle part of the outer wall of the driving rod.

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