CN219209245U

CN219209245U - Hydropower station water inlet pipe dirt blocking mechanism and sand discharging device

Info

Publication number: CN219209245U
Application number: CN202222886042.2U
Authority: CN
Inventors: 王现锋; 何沐星; 刘牵; 胡涛; 李兵伟; 柳三喜; 刘徳翼; 旦增西洛; 龙远扬
Original assignee: Huaneng Yarlung Tsangpo River Hydropower Development Investment Co Ltd
Current assignee: Huaneng Yarlung Tsangpo River Hydropower Development Investment Co Ltd
Priority date: 2022-10-31
Filing date: 2022-10-31
Publication date: 2023-06-20
Anticipated expiration: 2032-10-31

Abstract

The utility model discloses a water inlet pipe dirt blocking mechanism and a sand discharging device of a hydropower station, which comprises a dirt blocking mechanism, wherein the dirt blocking mechanism comprises a dirt blocking box, a baffle plate arranged in the middle of the dirt blocking box, a first dirt blocking net and a second dirt blocking net which are arranged in the dirt blocking box, and a sewage discharging mechanism, wherein the sewage discharging mechanism comprises a reset spring arranged in the dirt blocking box, a sealing plate arranged at the right end of the reset spring and a sewage discharging outlet arranged on the front surface and the rear surface of the dirt blocking box.

Description

Hydropower station water inlet pipe dirt blocking mechanism and sand discharging device

Technical Field

The utility model relates to the technical field of hydropower station water inlet pipes, in particular to a hydropower station water inlet pipe dirt blocking mechanism and a sand discharging device.

Background

The hydroelectric power station is composed of a hydraulic system, a mechanical system, an electric energy generating device and the like, is a hydraulic junction project for realizing the conversion from water energy to electric energy, the sustainability of electric energy production requires that the utilization of the water energy of the hydroelectric power station has uninterrupted property, the distribution of hydraulic resources in time and space is artificially regulated and changed through the construction of a reservoir system of the hydroelectric power station, the sustainable utilization of the hydraulic resources is realized, a water inlet pipe of the hydroelectric power station is a pipeline inside the water power station, and a trash blocking device is arranged at a water inlet of the water inlet pipe for blocking garbage in the outside water, so that the garbage is prevented from entering the water inlet pipe to cause blockage.

The existing hydropower station water inlet pipe trash blocking mechanism is characterized in that in the using process, filtered garbage is easy to accumulate in the trash blocking device, the trash blocking device is required to be opened to clean the garbage in the trash blocking device along with the influence of the accumulation of the garbage on the normal use of the trash blocking device, so that the working efficiency of the trash blocking device is reduced, the working strength of workers is increased, and therefore the hydropower station water inlet pipe trash blocking mechanism and the sand discharging device are provided.

Disclosure of Invention

This section is intended to summarize some aspects of embodiments of the utility model and to briefly introduce some preferred embodiments, which may be simplified or omitted from the present section and description abstract and title of the application to avoid obscuring the objects of this section, description abstract and title, and which is not intended to limit the scope of this utility model.

The present utility model has been made in view of the above and/or problems occurring in the prior art.

Therefore, the technical problem to be solved by the utility model is that the trash can be cleaned by opening the trash holding device, so that the working efficiency of the trash holding device is reduced and the working strength of staff is increased.

In order to solve the technical problems, the utility model provides the following technical scheme: a sewage blocking mechanism of a water inlet pipe of a hydropower station, which comprises,

the sewage blocking mechanism comprises a sewage blocking box, a baffle plate arranged in the middle of the inside of the sewage blocking box, and a first sewage blocking net and a second sewage blocking net which are arranged in the inside of the sewage blocking box; the first dirt blocking net and the second dirt blocking net are respectively a large-hole dirt blocking net and a small-hole dirt blocking net; the method comprises the steps of,

the sewage draining mechanism comprises a reset spring arranged in the sewage blocking box, a sealing plate arranged at the right end of the reset spring and sewage draining outlets arranged on the front surface and the rear surface of the sewage blocking box; the four sealing plates and the four sewage outlets are respectively arranged, and the four sealing plates correspond to the positions of the four sewage outlets; the method comprises the steps of,

the flow dividing mechanism comprises a rotating rod, a flow dividing plate, an ejection spring and an extension plate, wherein the rotating rod is rotatably connected to the rear side of the inside of the partition plate, the flow dividing plate is arranged on the outer surface of the rotating rod, the ejection spring is arranged in the flow dividing plate, and the extension plate is arranged at the front end of the ejection spring; the front end of the extension plate penetrates through the front surface of the flow dividing plate and extends to the outer side of the flow dividing plate.

As a preferable scheme of the water inlet pipe dirt blocking mechanism of the hydropower station, the utility model comprises the following steps: the end of the outer wall of the trash can is provided with a water inlet, the interior of the two water inlets is provided with trash grids, and the front end and the rear end of the right side wall of the trash can are provided with water inlet pipes.

As a preferable scheme of the water inlet pipe dirt blocking mechanism of the hydropower station, the utility model comprises the following steps: the position in the dirt blocking box, which is close to the middle part, is rotationally connected with mounting rods, the number of the mounting rods is four, and the outer surfaces of the four mounting rods are provided with guide plates.

As a preferable scheme of the water inlet pipe dirt blocking mechanism of the hydropower station, the utility model comprises the following steps: the inside of blocking dirty case is provided with the mounting panel, and the mounting panel is equipped with four, four the mounting panel respectively with four the position of closing plate corresponds, and four mounting panels respectively with four closing plate's surface in close contact.

As a preferable scheme of the water inlet pipe dirt blocking mechanism of the hydropower station, the utility model comprises the following steps: the inside of flow distribution plate has been seted up the spout, the right side of extension plate surface is provided with the slider, and slider and spout all are equipped with two, two slider sliding connection respectively is in two the inside of spout.

As a preferable scheme of the water inlet pipe dirt blocking mechanism of the hydropower station, the utility model comprises the following steps: the right side inside the trash holding box is movably connected with a baffle, the rear end of the baffle penetrates through the baffle and is provided with the rear side of the baffle, and the baffle corresponds to the positions of the two water inlet pipes.

The utility model has the beneficial effects that: the drain outlet can be opened by moving the sealing plate, and impurities in the dirt blocking box are discharged through the drain outlet by water flow, so that the aim of cleaning the impurities in the dirt blocking box can be fulfilled.

In view of the fact that the sewage blocking mechanism of the water inlet pipe of the hydropower station is difficult to discharge fine sand and other objects in the sewage blocking box in the working process, normal use of the sewage blocking device is affected, and therefore the sand discharging device is provided.

In order to solve the technical problems, the utility model also provides the following technical scheme: a sand removing device, characterized in that: the sewage blocking mechanism comprises the water inlet pipe sewage blocking mechanism of the hydropower station; the method comprises the steps of,

the driving mechanism comprises a main toothed plate arranged on the upper surface of the sealing plate, a main gear rotationally connected to the upper surface of the dirt blocking box, a transmission roller arranged on the upper surface of the main gear and the top of the outer surface of the mounting rod, and a transmission belt in transmission connection with the outer surfaces of the two transmission rollers; the main gears and the main gear plates are respectively provided with four, and the four main gear plates are respectively meshed with the four main gears.

As a preferable mode of the sand discharging device of the present utility model, wherein: the utility model discloses a sewage treatment device, including dirt blocking box, main servo motor, shaft coupling, gear, driven bevel gear, installation shell, installation pole, four the edge of dirt blocking box upper surface is provided with the installation shell, the interior roof of installation shell is provided with main servo motor, and main servo motor is equipped with two, two main servo motor's output shaft all is connected with the axis of rotation through the shaft coupling transmission, two the both ends of axis of rotation all are provided with the transmission bevel gear, four the upper end of installation pole all is provided with driven bevel gear, and four transmission bevel gears mesh with four driven bevel gears respectively.

As a preferable mode of the sand discharging device of the present utility model, wherein: the right side of roof is provided with auxiliary servo motor in the installation shell, auxiliary servo motor's output shaft passes through the upper end transmission of shaft coupling and dwang and is connected, the top of dwang surface is provided with auxiliary gear, the upper surface of baffle is provided with auxiliary toothed plate, and auxiliary gear meshes with auxiliary toothed plate mutually.

As a preferable mode of the sand discharging device of the present utility model, wherein: the top of blocking in the dirty case is provided with the organ cover, and the organ cover is equipped with ten, ten the both ends of organ cover set up respectively at the internal surface of blocking dirty case roof and the surface of main pinion rack and auxiliary pinion rack, the internal roof of installation shell is provided with the locating piece, and the locating piece is equipped with two, two the axis of rotation is kept away from the one end of main servo motor and is connected with the outer wall rotation of two locating pieces respectively.

The utility model has the beneficial effects that: starting the main servo motor, can driving transmission bevel gear through the axis of rotation and rotate, the cooperation driven bevel gear can drive the installation pole and rotate to can drive the guide plate and rotate, can drive the drive gyro wheel that is located the middle part when the installation pole rotates and rotate, cooperation drive belt can drive the main gear with the drive gyro wheel in outside and rotate, thereby can drive main pinion rack and closing plate and remove and open the drain, start and assist servo motor, can drive dwang and flow distribution plate rotation, can drive the pinion and rotate when the dwang rotates, the cooperation is assisted the pinion rack and can be driven the closing plate and remove.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. Wherein:

FIG. 1 is a schematic perspective view of the present utility model;

FIG. 2 is a first cross-sectional top view of the present utility model;

FIG. 3 is a second cross-sectional top view of the present utility model;

fig. 4 is a front cross-sectional view of the present utility model.

Detailed Description

In order that the above-recited objects, features and advantages of the present utility model will become more readily apparent, a more particular description of the utility model will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, but the present utility model may be practiced in other ways other than those described herein, and persons skilled in the art will readily appreciate that the present utility model is not limited to the specific embodiments disclosed below.

In the following detailed description of the embodiments of the present utility model, reference is made to the accompanying drawings, which form a part hereof, and in which are shown by way of illustration only, and in which is shown by way of illustration only, and in which the scope of the utility model is not limited for ease of illustration. In addition, the three-dimensional dimensions of length, width and depth should be included in actual fabrication.

Further still, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic may be included in at least one implementation of the utility model. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.

Example 1

Referring to fig. 1-4, in a first embodiment of the present utility model, a sewage blocking mechanism for a water inlet pipe of a hydropower station is provided, and impurities in water can be filtered by matching a sewage blocking grid 103 arranged inside a sewage blocking box 101 with a first sewage blocking net 105 and a second sewage blocking net 106, so that the blockage of the water inlet pipe caused by the impurities entering the water inlet pipe is reduced.

Specifically, the dirt blocking mechanism 100 comprises a dirt blocking box 101, a partition plate 104 arranged in the middle of the dirt blocking box 101, and a first dirt blocking net 105 and a second dirt blocking net 106 arranged in the dirt blocking box 101; the first dirt blocking net 105 and the second dirt blocking net 106 are respectively provided with two, the first dirt blocking net 105 and the second dirt blocking net 106 are respectively a large-hole dirt blocking net and a small-hole dirt blocking net, the end parts of the outer wall of the dirt blocking box 101 are provided with water inlets 102, dirt blocking grids 103 are respectively arranged in the two water inlets 102, and the front end and the rear end of the right side wall of the dirt blocking box 101 are respectively provided with a water inlet pipe.

Wherein, make external water get into the inside of blocking dirty case 101 through water inlet 102, block dirty grid 103 cooperation first blocking dirty net 105 and second blocking dirty net 106 through setting up in blocking dirty case 101 inside can filter the impurity in the water, reduce the inside that the impurity got into the inlet tube and cause the inlet tube to block up.

Example 2

Referring to fig. 2 and 4, in a second embodiment of the present utility model, the difference is that the rotation of the rotating rod 301 can drive the flow dividing plate 302 to rotate, the extending plate 304 can be driven to move by the elastic force of the ejection spring 303 to divide the water in one side, the baffle 307 moves to seal the water inlet pipe on the other side, the installation rod 205 can drive the flow guiding plate 206 to rotate to guide the water on the other side, the drain outlet 203 can be opened by moving the sealing plate 202, and the impurities in the dirt blocking box 101 can be discharged through the drain outlet 203 by the water flow, so that the purpose of cleaning the impurities in the dirt blocking box 101 can be achieved.

Specifically, the sewage draining mechanism 200 comprises a return spring 201 arranged in the sewage blocking box 101, a sealing plate 202 arranged at the right end of the return spring 201, and a sewage draining outlet 203 arranged on the front surface and the rear surface of the sewage blocking box 101; four sealing plates 202 and drain openings 203 are respectively arranged, and the positions of the four sealing plates 202 respectively correspond to the positions of the four drain openings 203; and a diverting mechanism 300 including a rotating rod 301 rotatably connected to the rear side inside the partition plate 104, a diverting plate 302 provided on the outer surface of the rotating rod 301, an ejector spring 303 provided inside the diverting plate 302, and an extension plate 304 provided at the front end of the ejector spring 303; the front end of extension board 304 runs through the front surface of division board 302 and extends to the outside of division board 302, the position that is close to the middle part in blocking dirty case 101 rotates and is connected with installation pole 205, and installation pole 205 is equipped with four, the surface of four installation poles 205 all is provided with guide plate 206, the inside of blocking dirty case 101 is provided with mounting panel 204, and mounting panel 204 is equipped with four, four mounting panel 204 respectively correspond with the position of four closing plate 202, and four mounting panel 204 respectively with the surface in close contact with of four closing plate 202, spout 306 has been seted up to the inside of division board 302, the right side of extension board 304 surface is provided with slider 305, and slider 305 and spout 306 all are equipped with two, two slider 305 sliding connection are in the inside of two spouts 306 respectively, the right side swing joint in blocking dirty case 101 has baffle 307, and the rear end of baffle 307 runs through baffle 104 and just sets up the rear side of baffle 104, baffle 307 corresponds with the position of two inlet tubes.

Wherein, make dwang 301 rotate can drive the flow distribution plate 302 and rotate, can drive extension board 304 through the elasticity of ejecting spring 303 and remove, to the water of wherein one side inside shunts, and baffle 307 removes the inlet tube to the opposite side and seal, make installation pole 205 rotate and can drive guide plate 206 rotation, water to the opposite side is guided, remove closing plate 202 can open drain 203, pass through drain 203 with the impurity that blocks dirty incasement 101 inside through the rivers and discharge, thereby can reach and block dirty incasement 101 inside impurity and clean purpose.

In summary, the position of the sealing plate 202 is limited by the mounting plate 204, after the drain 203 is used, the sealing plate 202 can be driven to move by the elastic force of the return spring 201, the drain 203 is sealed by the sealing plate 202, when the extension plate 304 moves, the position of the extension plate 304 in the moving and using process can be limited by the sliding block 305 and the sliding groove 306, and the stability of the extension plate 304 in the moving and using process is increased.

Example 3

Referring to fig. 2 and 4, in a third embodiment of the present utility model, a sand discharging device is provided, in which a main servo motor 406 is started, a transmission bevel gear 408 can be driven to rotate by a rotating shaft 407, a driven bevel gear 409 can drive a mounting rod 205 to rotate, thereby driving a deflector 206 to rotate, a transmission roller 404 located in the middle can be driven to rotate when the mounting rod 205 rotates, a transmission belt 405 and a transmission roller 404 located on the outer side can drive the main gear 403 to rotate, thereby driving a main toothed plate 402 and a sealing plate 202 to move to open a drain 203, an auxiliary servo motor 410 is started, a rotating rod 301 and a diversion plate 302 can be driven to rotate, an auxiliary gear 411 can be driven to rotate when the rotating rod 301 rotates, and a baffle 307 can be driven to move by matching with an auxiliary toothed plate 412.

Specifically, the driving mechanism 400 comprises a main gear plate 402 arranged on the upper surface of the sealing plate 202, a main gear 403 rotatably connected to the upper surface of the dirt blocking box 101, a transmission roller 404 arranged on the upper surface of the main gear 403 and on the top of the outer surface of the mounting rod 205, and a transmission belt 405 in transmission connection with the outer surfaces of the two transmission rollers 404; the four main gears 403 and the four main toothed plates 402 are respectively arranged, the four main toothed plates 402 are respectively meshed with the four main gears 403, the edge of the upper surface of the trash can 101 is provided with a mounting shell 401, the inner top wall of the mounting shell 401 is provided with a main servo motor 406, the two main servo motors 406 are arranged, the output shafts of the two main servo motors 406 are respectively connected with a rotating shaft 407 through a coupling transmission, the two ends of the two rotating shafts 407 are respectively provided with a transmission bevel gear 408, the upper ends of the four mounting rods 205 are respectively provided with a driven bevel gear 409, the four transmission bevel gears 408 are respectively meshed with the four driven bevel gears 409, the right side of the inner top wall of the mounting shell 401 is provided with an auxiliary servo motor 410, the output shaft of assisting servo motor 410 passes through the shaft coupling and is connected with the upper end transmission of dwang 301, the top of dwang 301 surface is provided with auxiliary gear 411, the upper surface of baffle 307 is provided with auxiliary toothed plate 412, and auxiliary gear 411 meshes with auxiliary toothed plate 412, the top in the trash can 101 is provided with organ cover 413, and organ cover 413 is equipped with ten, ten organ cover 413's both ends set up respectively at the internal surface of trash can 101 roof and the surface of main toothed plate 402 and auxiliary toothed plate 412, the internal roof of installation shell 401 is provided with the locating piece, and the locating piece is equipped with two, the one end that main servo motor 406 was kept away from to two axis of rotation 407 rotates with the outer wall of two locating pieces respectively and is connected.

Wherein, start main servo motor 406, can drive transmission bevel gear 408 through rotation axis 407 and rotate, cooperation driven bevel gear 409 can drive installation pole 205 and rotate, thereby can drive guide plate 206 and rotate, can drive the driving roller 404 that is located the middle part when installation pole 205 rotates and rotate, cooperation driving belt 405 can drive main gear 403 with the driving roller 404 in the outside and rotate, thereby can drive main pinion rack 402 and closing plate 202 and remove and open drain 203, start auxiliary servo motor 410, can drive dwang 301 and flow distribution plate 302 rotation, can drive auxiliary gear 411 and rotate when dwang 301 rotates, cooperation auxiliary pinion rack 412 can drive baffle 307 and remove.

To sum up, can drive the organ cover 413 and stretch out and draw back when main pinion rack 402 and supplementary pinion rack 412 remove, can block the inside water and the rubbish of trash can 101 through the organ cover 413, avoid water and rubbish to cause the influence to the normal work of actuating mechanism 400, rotate when axis of rotation 407, can restrict the right-hand member of axis of rotation 407 through the locating piece, increase the stability of axis of rotation 407 in the rotation in-process.

It is important to note that the construction and arrangement of the present application as shown in a variety of different exemplary embodiments is illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters (e.g., temperature, pressure, etc.), mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter described in this application. For example, elements shown as integrally formed may be constructed of multiple parts or elements, the position of elements may be reversed or otherwise varied, and the nature or number of discrete elements or positions may be altered or varied. Accordingly, all such modifications are intended to be included within the scope of present utility model. The order or sequence of any process or method steps may be varied or re-sequenced according to alternative embodiments. In the claims, any means-plus-function clause is intended to cover the structures described herein as performing the recited function and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present utility models. Therefore, the utility model is not limited to the specific embodiments, but extends to various modifications that nevertheless fall within the scope of the appended claims.

Furthermore, in an effort to provide a concise description of the exemplary embodiments, all features of an actual implementation may not be described (i.e., those not associated with the best mode presently contemplated for carrying out the utility model, or those not associated with practicing the utility model).

It should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort might be complex and time consuming, but would nevertheless be a routine undertaking of design, fabrication, and manufacture for those of ordinary skill having the benefit of this disclosure.

It should be noted that the above embodiments are only for illustrating the technical solution of the present utility model and not for limiting the same, and although the present utility model has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present utility model may be modified or substituted without departing from the spirit and scope of the technical solution of the present utility model, which is intended to be covered in the scope of the claims of the present utility model.

Claims

1. A hydropower station water inlet pipe trash blocking mechanism is characterized in that: comprising the steps of (a) a step of,

the sewage blocking mechanism (100) comprises a sewage blocking box (101), a partition plate (104) arranged in the middle of the inside of the sewage blocking box (101), and a first sewage blocking net (105) and a second sewage blocking net (106) which are arranged in the inside of the sewage blocking box (101); the first dirt blocking net (105) and the second dirt blocking net (106) are two, and the first dirt blocking net (105) and the second dirt blocking net (106) are a large-hole dirt blocking net and a small-hole dirt blocking net respectively; the method comprises the steps of,

the sewage draining mechanism (200) comprises a reset spring (201) arranged in the sewage blocking box (101), a sealing plate (202) arranged at the right end of the reset spring (201) and a sewage draining outlet (203) arranged on the front surface and the rear surface of the sewage blocking box (101); four sealing plates (202) and four sewage outlets (203) are respectively arranged, and the four sealing plates (202) correspond to the positions of the four sewage outlets (203); the method comprises the steps of,

the flow dividing mechanism (300) comprises a rotating rod (301) rotatably connected to the rear side of the inside of the partition plate (104), a flow dividing plate (302) arranged on the outer surface of the rotating rod (301), an ejection spring (303) arranged inside the flow dividing plate (302) and an extension plate (304) arranged at the front end of the ejection spring (303); the front end of the extension plate (304) penetrates the front surface of the flow dividing plate (302) and extends to the outer side of the flow dividing plate (302).

2. The hydropower station water inlet pipe trash holding mechanism according to claim 1, wherein: the end of the outer wall of the dirt blocking box (101) is provided with a water inlet (102), dirt blocking grids (103) are arranged in the two water inlets (102), and the front end and the rear end of the right side wall of the dirt blocking box (101) are provided with water inlet pipes.

3. The hydropower station water inlet pipe trash holding mechanism according to claim 2, wherein: the position in the dirt blocking box (101) close to the middle is rotationally connected with mounting rods (205), the number of the mounting rods (205) is four, and guide plates (206) are arranged on the outer surfaces of the four mounting rods (205).

4. Hydropower station water inlet pipe dirt blocking mechanism according to claim 1 or 2, characterized in that: the inside of blocking dirty case (101) is provided with mounting panel (204), and mounting panel (204) are equipped with four, four mounting panel (204) respectively with four sealing plate (202) the position corresponds, and four mounting panel (204) respectively with four sealing plate (202) surface in close contact.

5. The hydropower station water inlet pipe trash holding mechanism of claim 4, wherein: sliding grooves (306) are formed in the splitter plate (302), sliding blocks (305) are arranged on the right side of the outer surface of the extension plate (304), two sliding blocks (305) and two sliding grooves (306) are respectively arranged, and the two sliding blocks (305) are respectively and slidably connected in the two sliding grooves (306).

6. The hydropower station water inlet pipe trash holding mechanism of claim 5, wherein: the right side inside trash can (101) swing joint has baffle (307), and the rear end of baffle (307) runs through baffle (104) and locates the rear side of baffle (104), baffle (307) are corresponding with the position of two inlet tubes, the upper surface of baffle (307) is provided with supplementary pinion rack (412).

7. A sand removing device, characterized in that: comprising a hydropower station water inlet pipe dirt blocking mechanism according to any one of claims 1-6; the method comprises the steps of,

the driving mechanism (400) comprises a main toothed plate (402) arranged on the upper surface of the sealing plate (202), a main gear (403) rotatably connected to the upper surface of the dirt blocking box (101), a transmission roller (404) arranged on the upper surface of the main gear (403) and on the top of the outer surface of the mounting rod (205), and a transmission belt (405) in transmission connection with the outer surfaces of the two transmission rollers (404); the main gears (403) and the main toothed plates (402) are respectively provided with four, and the four main toothed plates (402) are respectively meshed with the four main gears (403).

8. The sand removing apparatus according to claim 7, wherein: the utility model discloses a sewage treatment device, including trash box (101), including installing pole (205), main servo motor (406), output shaft, gear box, mounting pole (205), mounting shell (401) are provided with in edge of trash box (101), the interior roof of mounting shell (401) is provided with main servo motor (406), and main servo motor (406) are equipped with two, two the output shaft of main servo motor (406) all is connected with axis of rotation (407) through the shaft coupling transmission, two the both ends of axis of rotation (407) all are provided with transmission bevel gear (408), four the upper end of installation pole (205) all is provided with driven bevel gear (409), and four transmission bevel gear (408) mesh with four driven bevel gear (409) respectively.

9. The sand removing apparatus of claim 8, wherein: an auxiliary servo motor (410) is arranged on the right side of the inner top wall of the mounting shell (401), an output shaft of the auxiliary servo motor (410) is in transmission connection with the upper end of the rotating rod (301) through a coupler, an auxiliary gear (411) is arranged on the top of the outer surface of the rotating rod (301), and the auxiliary gear (411) is meshed with an auxiliary toothed plate (412).

10. The sand removing apparatus according to claim 9, wherein: the top in trash can (101) is provided with organ cover (413), and organ cover (413) are equipped with ten, ten the both ends of organ cover (413) set up respectively at the internal surface of trash can (101) roof and the surface of main pinion rack (402) and auxiliary pinion rack (412), the internal roof of installation shell (401) is provided with the locating piece, and the locating piece is equipped with two, two one end that main servo motor (406) was kept away from to axis of rotation (407) is connected with the outer wall rotation of two locating pieces respectively.