A trash cutting and crushing device in front of a trash rack

Abstract

The present invention discloses a device for cutting and crushing waste in front of a trash rack, comprising: a rotary cutting type waste cleaning mechanism and a waste cleaning auxiliary mechanism arranged in front of the trash rack. The rotary cutting type waste cleaning mechanism and the waste cleaning auxiliary mechanism are respectively provided with a vertical lifting mechanism, and the rotary cutting type waste cleaning mechanism is located at the bottom of the trash rack when rotating and cutting the waste. The waste cleaning auxiliary mechanism pushes the waste in front of the trash rack into the rotary cutting type waste cleaning mechanism at the bottom during the vertical descent process, and moves downward to cover the top of the rotary cutting type waste cleaning mechanism; the rotary cutting type waste cleaning mechanism discharges the crushed waste by rising above the water surface. This device is used for the trash rack in front of the water inlet of a hydropower station or a pump station, and can solve the problem of waste accumulation in front of the trash rack that is difficult to clean, and has the advantages of low energy consumption and high efficiency.

Description

Technical Field

[0001] The invention relates to a dirt cutting and crushing device in front of a trash rack of a pump station or a power station. Background Art

[0002] Trash racks are essential equipment for large pumping stations and power stations. They use bars to trap impurities such as sand, silt, aquatic plants, and branches in front of the equipment, preventing them from entering the pump cavity or the pump blades and affecting the normal operation of the pump. Large amounts of dirt often accumulate in front of the water inlet of hydropower stations and pumping stations. When too much floating debris accumulates, the trash racks can become clogged, causing the water in the pumps and piping systems to become clogged with debris. This can cause a large number of vortices to appear in the water inlet, preventing the pumps from operating normally and, in severe cases, causing the pumping station to shut down. Currently, some power stations and pumping stations do not have trash rack cleaning equipment. When dirt gets stuck on the trash rack, it is cleaned manually, which is laborious and unsafe. Currently, the problem of concentrated dirt at the water inlet that is difficult to clean is a key task for the water conservancy industry.

[0003] The existing garbage cutting and crushing devices in front of the trash rack are mostly garbage suction crushing devices or simple lifting crushing devices. The garbage suction crushing devices are difficult to suck in floating large objects such as branches. The lifting crushing devices have the same problem, that is, it is difficult to crush all the previous garbage, and the crushed garbage is easy to pollute the water body. When entering the pump cavity with the water flow, it is still easy to impact the pump blades. Summary of the Invention

[0004] Purpose of the invention: In view of the above-mentioned existing technologies, a device for cutting and crushing waste in front of a trash rack is proposed, which is used for the trash rack in front of the water inlet of a hydropower station or a pumping station to solve the problem that waste in front of the trash rack is difficult to clean.

[0005] Technical solution: A device for cutting and crushing waste in front of a trash rack, comprising: a rotary cutting type waste cleaning mechanism and a waste cleaning auxiliary mechanism arranged in front of the trash rack; the rotary cutting type waste cleaning mechanism and the waste cleaning auxiliary mechanism are respectively provided with a vertical lifting mechanism, and the rotary cutting type waste cleaning mechanism is located at the bottom of the trash rack when rotating and cutting the waste; the waste cleaning auxiliary mechanism pushes the waste in front of the trash rack into the rotary cutting type waste cleaning mechanism at the bottom during the vertical descent process, and moves downward to cover the top of the rotary cutting type waste cleaning mechanism; the rotary cutting type waste cleaning mechanism discharges the crushed waste by rising above the water surface.

[0006] Furthermore, a plurality of the trash cleaning auxiliary mechanisms are arranged on the front side of the trash rack along the width direction of the trash rack, and the trash cleaning auxiliary mechanisms arranged side by side cover the entire width of the trash rack.

[0007] Furthermore, the rotary cutting type cleaning mechanism includes a dirt collecting tank, in which a horizontally arranged first rotating shaft is provided, and the first rotating shaft is connected to a number of U-shaped blades at intervals along the axial direction; a first motor is also provided to drive the rotating shaft to rotate, and the U-shaped blade is divided into a sickle-shaped blade in the upper half and a hook-shaped blade in the lower half by a fixed connection point with the first rotating shaft, and the fixed connection point is biased towards the upper part of the U-shape, so that the rotation radius of the hook-shaped blade is larger than the rotation radius of the sickle-shaped blade.

[0008] Furthermore, the trash cleaning auxiliary mechanism includes a horizontally arranged push plate, and a side edge of the push plate close to the trash rack is provided with downward rake teeth.

[0009] Furthermore, a camera is provided in the sewage collecting tank of the rotary cutting type sewage cleaning mechanism, and the camera is used to collect images in the sewage collecting tank and transmit them to the controller, and control the sewage collecting tank to rise above the water surface when the crushed sewage fills the sewage collecting tank.

[0010] Furthermore, the head end and the tail end of the U-shaped blade are sharp-angled blades.

[0011] Furthermore, the blade bending angle of the sickle-shaped blade in the upper half of the "Y"-shaped blade is 60 degrees.

[0012] Furthermore, the vertical lifting mechanism of the rotary cutting type cleaning mechanism includes two vertically arranged worm gears, which are respectively connected to the two ends of the sewage collecting tank, and the upper parts of the two worm gears are respectively connected to the second motor through turbines.

[0013] Furthermore, the vertical lifting mechanism of the dirt cleaning auxiliary mechanism is a chain elevator, which includes a horizontally arranged second rotating shaft, and the second rotating shaft is driven to rotate by a third motor; at least two gears are connected to the second rotating shaft, and the top of the push plate is linked to the gears through a chain, and a push plate counterweight block connected to the chain is provided.

[0014] Beneficial Effects: The present invention provides a trash cutting and shredding device in front of a trash rack. When the trash in front of the trash rack is clogged to a certain extent, a cleaning auxiliary mechanism can actively push the trash in front of the trash rack into the rotary cutting and cleaning mechanism at the bottom. Compared with existing mechanisms, this increases the ratio of trash entering the shredding mechanism, thereby improving efficiency. In addition, the present invention also designs a "Y"-shaped blade for use in the rotary cutting and cleaning mechanism. The hook-shaped blade in the lower half of the "Y"-shaped blade can efficiently hook the trash into the sump, where it is effectively shredded by the sickle-shaped blade in the upper half. The cleaning auxiliary mechanism can move to cover the top of the rotary cutting and cleaning mechanism, ensuring that the shredded trash remains in the sump as much as possible. When the sump is full, it rises to the water surface through a camera to facilitate the discharge of the shredded trash. In addition, when the device is not in operation, the entire device can be lifted above the water surface to reduce the impact of the cleaning device on the flow state of the water inlet, allowing the water to flow smoothly into the pump station or power station unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of the trash cutting and crushing device in front of the trash rack of the present invention;

[0016] Figure 2 It is a structural diagram of the rotary cutting type cleaning mechanism;

[0017] Figure 3 This is a three-dimensional model diagram of the B-shaped blade;

[0018] Figure 4 It is a structural diagram of the pollution cleaning auxiliary mechanism. Implementation Method

[0019] The present invention will be further explained below with reference to the accompanying drawings.

[0020] like Figure 1 As shown, a trash rack waste cutting and shredding device comprises: a rotary-cutting trash cleaning mechanism 6 and a trash-cleaning auxiliary mechanism 2, both positioned in front of a trash rack 5 at the water inlet of a pumping station or power station 1. Each of the rotary-cutting trash cleaning mechanism 6 and the trash-cleaning auxiliary mechanism 2 is equipped with a vertical lifting mechanism. The rotary-cutting trash cleaning mechanism 2 is positioned at the bottom of the trash rack 5 during its rotary cutting operation. During its vertical descent, the trash-cleaning auxiliary mechanism 2 pushes trash in front of the trash rack 5 into the rotary-cutting trash cleaning mechanism 6 at the bottom, then moves downward to cover the top of the rotary-cutting trash cleaning mechanism 6. The rotary-cutting trash cleaning mechanism 6 then rises above the water surface to discharge the shredded waste.

[0021] like Figure 2As shown, the rotary cutting type garbage cleaning mechanism 6 includes a garbage collecting tank 601, in which a horizontally arranged first rotating shaft 602 is provided. The first rotating shaft 602 is connected to a plurality of U-shaped blades 603 at even intervals along the axial direction. The rotary cutting type garbage cleaning mechanism 6 is also provided with a first motor 604 that drives the rotating shaft 602 to rotate. The first motor 604 is fixed to one end of the garbage collecting tank 601. The vertical lifting mechanism of the rotary cutting type garbage cleaning mechanism 6 includes two vertically arranged worm gears 606, which are respectively connected to the two ends of the garbage collecting tank 601. The upper parts of the two worm gears 606 are respectively connected to the second motor 607 through turbines. The two second motors 607 on both sides are fixed to the concrete structure at the water inlet of the pump station or power station 1. The rotary cutting type garbage cleaning mechanism 6 moves up and down through this worm gear elevator.

[0022] like Figure 3 As shown, the "Y"-shaped blade 603 is made of stainless steel. Its overall structure is divided into an upper sickle-shaped blade and a lower hook-shaped blade at its fixed connection point with the first rotating shaft 602. The welded connection point is positioned at the upper portion of the "Y" shape, allowing the hook-shaped blade to rotate at a greater radius than the sickle-shaped blade. In this embodiment, the upper sickle-shaped blade has a 60° blade angle. The leading and trailing ends of the "Y"-shaped blade 603 utilize sharp angles to enhance cutting efficiency.

[0023] A camera 605 is also provided in the sewage collecting tank 601 of the rotary cutting type sewage cleaning mechanism 6. The camera 605 is used to collect images in the sewage collecting tank 601 and transmit them to the controller. When the sewage collecting tank 601 is filled with crushed dirt, the sewage collecting tank 601 is controlled to rise above the water surface.

[0024] In this embodiment, three trash cleaning auxiliary mechanisms 2 are arranged on the front side of the trash rack 5 along the width direction of the trash rack. The three trash cleaning auxiliary mechanisms 2 arranged side by side cover the entire width of the trash rack 5. Figure 4 As shown, the trash cleaning auxiliary mechanism 2 includes a horizontally arranged push plate 201. Downward-facing rake teeth 202 are provided on one side of the push plate 201 near the trash rack 5. The overall width of the push plate 201 and the rake teeth 202 matches the width of the trash collection trough 601. The vertical lifting mechanism of the trash cleaning auxiliary mechanism 2 is a chain elevator, comprising a horizontally arranged second rotating shaft 203, which is driven by a third motor 204. In this embodiment, two gears 205 are connected to the second rotating shaft 203. The top of the push plate 201 is connected to the gears 205 via a chain 206. A push plate counterweight 207 is provided, connected to the chain 206, and the vertical movement of the push plate 201 is controlled by the third motor 204. The push plate 201 can be constructed of a heavy metal or concrete structure. To reduce resistance, an array of small through-holes can be provided in the structure.

[0025] In this embodiment, a corresponding trash cleaning auxiliary mechanism 2 is provided on each section of the trash rack 5, and the operation of the push plate 201 above it can be specifically controlled according to the dirt blockage conditions at different positions of each section of the trash rack. Compared with the use of an integrated push plate 201 in front of the trash rack 5, this solution can greatly reduce the energy consumption of the push plate 201 during the downward or upward movement.

[0026] During operation, the cleaning assist mechanism 2 adjusts according to the degree of dirt blockage at various locations in front of the trash rack 5. Specifically, when the blockage reaches a certain level in front of one or more sections, the corresponding push plate 201 of the cleaning assist mechanism 2 descends, pushing dirt, such as vegetation, household garbage, and the like, that is blocking the trash rack 5 downward into the rotary cutting cleaning mechanism 6. The larger hook-shaped blades 603 in the rotary cutting cleaning mechanism 6 then engage the grooves, where they are then cut and shredded by the smaller sickle-shaped blades. During this process, the push plate 201 and its flank teeth 202 securely cover the top of the trough 601, preventing the shredded dirt from escaping the trough 601.

[0027] The sewage collecting tank 601 is equipped with an underwater camera 605, which can collect the collection of crushed sewage in the sewage collecting tank 601. When the crushed sewage accumulates to a certain level, the sewage collecting tank 601 will be lifted up by the worm gear lifting mechanism to process the sewage. It can be handled manually or in coordination with other automated mechanisms. By configuring the camera 605 to achieve real-time monitoring, there is no need to frequently lift the sewage collecting tank 601 to discharge sewage, thus achieving the purpose of energy conservation and emission reduction. In addition, when the device is not in operation, the device can be lifted to the water surface as a whole to reduce the impact of the sewage cleaning device on the flow state of the water inlet, so that the water flows smoothly into the unit of the pump station or power station.

[0028] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A trash cutting and crushing device in front of a trash rack, characterized in that: include: A rotary cutting type cleaning mechanism (6) and a cleaning auxiliary mechanism (2) are arranged on the front side of the trash rack (5); the rotary cutting type cleaning mechanism (6) and the cleaning auxiliary mechanism (2) are respectively provided with a vertical lifting mechanism, and the rotary cutting type cleaning mechanism (6) is located at the bottom of the trash rack (5) when rotating and cutting the trash; the cleaning auxiliary mechanism (2) pushes the trash in front of the trash rack (5) into the rotary cutting type cleaning mechanism (6) at the bottom during the vertical descent process, and moves downward to cover the top of the rotary cutting type cleaning mechanism (6); the rotary cutting type cleaning mechanism (6) discharges the crushed trash by rising above the water surface; The rotary cutting type dirt cleaning mechanism (6) comprises a dirt collecting tank (601), wherein a first rotating shaft (602) is arranged horizontally in the dirt collecting tank (601), and the first rotating shaft (602) is connected to a plurality of "Y"-shaped blades (603) at intervals along the axial direction; a first motor (604) is further provided for driving the first rotating shaft (602) to rotate, and the "Y"-shaped blade (603) is divided into an upper sickle-shaped blade and a lower hook-shaped blade by a fixed connection point with the first rotating shaft (602), and the fixed connection point is biased towards the upper part of the "Y" shape, so that the rotation radius of the hook-shaped blade is larger than the rotation radius of the sickle-shaped blade.

2. The trash cutting and crushing device in front of the trash rack according to claim 1, characterized in that: A plurality of the trash cleaning auxiliary mechanisms (2) are arranged on the front side of the trash rack (5) along the width direction of the trash rack, and the trash cleaning auxiliary mechanisms (2) arranged side by side cover the entire width of the trash rack (5).

3. The trash cutting and crushing device in front of the trash rack according to claim 1 or 2, characterized in that: The trash cleaning auxiliary mechanism (2) comprises a horizontally arranged push plate (201), and a side edge of the push plate (201) close to the trash rack (5) is provided with downward rake teeth (202).

4. The trash cutting and crushing device in front of the trash rack according to claim 1, characterized in that: A camera (605) is further provided in the dirt collecting tank (601) of the rotary cutting type dirt cleaning mechanism (6). The camera (605) is used to collect images in the dirt collecting tank (601) and transmit them to a controller. When the dirt collecting tank (601) is filled with crushed dirt, the controller controls the dirt collecting tank (601) to rise above the water surface.

5. The trash cutting and crushing device in front of the trash rack according to claim 1, characterized in that: The head and tail ends of the B-shaped blade (603) are sharp-angled blades.

6. The trash cutting and crushing device in front of the trash rack according to claim 1 or 5, characterized in that: The blade angle of the sickle-shaped blade in the upper half of the "Y"-shaped blade (603) is 60°.

7. The trash cutting and crushing device in front of the trash rack according to claim 1 or 4, characterized in that: The vertical lifting mechanism of the rotary cutting type dirt cleaning mechanism (6) comprises two vertically arranged worm gears (606), the two worm gears (606) being respectively connected to the two ends of the dirt collecting tank (601), and the upper parts of the two worm gears (606) being respectively connected to the second motor (607) via turbines.

8. The trash cutting and crushing device in front of the trash rack according to claim 3, characterized in that: The vertical lifting mechanism of the dirt cleaning auxiliary mechanism (2) is a chain lift, comprising a horizontally arranged second rotating shaft (203), wherein the second rotating shaft (203) is driven to rotate by a third motor (204); at least two gears (205) are connected to the second rotating shaft (203), and the top of the push plate (201) is linked to the gears (205) via a chain (206), and is provided with a push plate counterweight (207) connected to the chain (206).

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