A transfer device for raw screen grit from a sewage plant

Abstract

The utility model discloses a kind of for sewage plant coarse grid filter grid residue transfer device, belong to sewage treatment auxiliary equipment device technical field;It includes frame;Walking wheel is installed in the bottom of frame;A pair of vertical rods is installed in the front side of frame, and residue hopper is installed on the frame;Residue hopper is a bucket shape structure with both front end and top being open, rear end of residue hopper can be raised upwards around the hinge shaft, and is tilted to front side;Several water-collecting tanks of over-draining hole sewage are opened in the bottom of residue hopper;Front baffle is hingedly installed on vertical rod;When residue hopper is placed on frame, one side end face of front baffle is arranged on the front end of residue hopper;When residue hopper is tilted, front baffle is opened by residue hopper to form discharge opening;The utility model effectively solves the problems of difficult discharge and environmental pollution due to sewage dripping and easy diffusion of peculiar smell of the grid residue transfer trolley used in current small and medium-sized sewage plants.

Description

Technical Field

[0001] This utility model relates to the technical field of auxiliary equipment for sewage treatment, specifically to a device for transferring screenings from coarse screens in sewage treatment plants. Background Technology

[0002] In wastewater treatment processes, coarse screens are used to intercept and remove large suspended solids and floating debris from wastewater entering the treatment plant. These screenings are typically filtered by scraper elevators and collected by screenings collection equipment below the elevator's discharge port before being transported. However, in small and medium-sized wastewater treatment plants, the screenings collection equipment commonly used is mostly simple open-top containers, with slightly better facilities equipped with similarly open-top trolleys. Because screenings are complex in composition, including plastics, fabrics, and hair, they are prone to tangling and adhesion. When using such equipment to transport and unload the screenings, workers need to use shovels or even their bare hands, resulting in high labor intensity, poor hygiene, and the risk of being cut by sharp objects. In addition, the screenings have a high water content, causing wastewater to continuously drip from the vehicle during transportation, polluting the plant's roads and causing secondary pollution. The slippery roads also pose safety hazards, and the open design allows odors to easily spread during transportation, worsening the working environment. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a transfer device for screenings from coarse screens in sewage treatment plants, so as to solve the problems of unloading difficulties and environmental pollution caused by sewage leakage and easy diffusion of odors in the screenings transfer trolleys currently used in small and medium-sized sewage treatment plants.

[0004] To solve the above problems, this utility model provides the following technical solution: A transfer device for coarse screen filter residue in a wastewater treatment plant; it includes a frame; wheels mounted on the bottom of the frame; a pair of vertically arranged uprights mounted on the front side of the frame; a slag hopper hinged to the frame near the front uprights via a hinge shaft; the slag hopper is a bucket-shaped structure with an open front and top, the rear end of the slag hopper being able to rise upwards around the hinge shaft and tilt forward; a collection trough for wastewater with several drainage holes is opened at the bottom of the slag hopper; a front baffle is hinged to the uprights; when the slag hopper is placed flat on the frame, one side end of the front baffle rests against the front end of the slag hopper; when the slag hopper tilts, the front baffle is pushed open by the slag hopper to form a discharge port.

[0005] Preferably, the traveling wheels include a pair of swivel wheels with locking mechanisms and a pair of fixed wheels; the swivel wheels are mounted on the rear side of the frame; the fixed wheels are mounted on the front side of the frame.

[0006] Preferably, an L-shaped push rod is provided on the rear side of the frame; a handle is installed on the extended end of the push rod.

[0007] Furthermore, a retaining ring is provided at the tail end of the slag hopper and at the corresponding position of the push rod, with the axis of the retaining ring set horizontally; the slag hopper and the push rod are detachably connected together at the retaining ring by a pin; the slag hopper can only rotate relative to the frame after the pin is removed.

[0008] Preferably, the drainage holes are evenly arranged on the bottom surface of the slag hopper.

[0009] Preferably, a drainage hole is provided on the side of the frame; the drainage hole is connected to a water collection tank; and a valve for controlling the opening and closing is installed at the drainage hole.

[0010] Preferably, the height of the upright is greater than the height of the slag hopper; the front baffle is hinged to the upper side of the upright; a magnetic block made of permanent magnet material is provided at the lower part of the upright; the front baffle is made of magnetic metal material.

[0011] Furthermore, the front baffle is a flat plate structure, with its lower part flush with the bottom surface of the slag hopper. A waterstop is also provided on the side of the front baffle facing the slag hopper to prevent sewage from overflowing from the side of the front baffle.

[0012] A torsion spring is also installed at the hinge shaft connecting the slag hopper and the chassis; when the torsion spring is in its natural state, the slag hopper maintains a tilted posture relative to the chassis.

[0013] The beneficial effects of this utility model are reflected in the following aspects: 1. This utility model, through the joint design of the hinge shaft and the torsion spring, allows the slag hopper to automatically rise and tilt forward with the assistance of the torsion spring after the locking pin is released, thus achieving complete self-unloading of the screenings. This mechanism replaces the traditional manual shoveling operation, greatly reducing labor intensity, avoiding direct contact between operators and sludge, and effectively eliminating health and safety hazards. 2. The bottom of the slag hopper is equipped with a drain hole and a sealed water collection tank below, which can effectively collect the sewage carried in the screenings and control the discharge through a valve. This design fundamentally solves the problems of sewage leakage, pollution of the factory road surface and slippery ground caused by traditional open-top trolleys during transportation, keeps the environment clean and eliminates secondary pollution. 3. The front baffle fits snugly against the front end of the slag hopper and is equipped with a water-stop strip, forming an effective seal and reducing the spread of odors; the design of the magnetic suction device ensures the stability of the baffle when it is closed, and also allows it to be pushed open by the side of the slag hopper when unloading, taking into account both sealing performance and ease of operation, which helps to improve the working environment. 4. The front and rear arrangement of casters and fixed wheels makes the trolley move flexibly and park stably during operation; the entire device adopts a purely mechanical structure, requiring no electric drive, making it very suitable for the humid and corrosive working environment of sewage treatment plants. It has a robust structure, low failure rate, and is easy to maintain. 5. This device integrates collection, drainage, transfer, and self-unloading functions, with a high degree of automation, which greatly reduces the operation time and labor costs of screenings treatment. It is particularly suitable for promotion and application in small and medium-sized sewage treatment plants, and can significantly improve the overall work efficiency and hygiene level of screenings treatment. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model in an embodiment; Explanation of reference numerals in the attached diagram: 1. Chassis, 2. Wheels, 3. Upright pole, 4. Slag hopper, 5. Front baffle, 6. Push rod, 7. Valve, 8. Water collection trough, 9. Snap ring. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings and specific embodiments: Example: Reference Figure 1 This embodiment provides a transfer device for coarse screen filter residue in a wastewater treatment plant; it includes a frame 1; wheels 2 are installed at the bottom of the frame 1; a pair of uprights 3 are installed on the front side of the frame 1, the uprights 3 are arranged vertically; a slag hopper 4 is hinged to the frame 1 near the front uprights 3 via a hinge shaft; the slag hopper 4 is a bucket-shaped structure with an open front end and top, the rear end of the slag hopper 4 can be raised around the hinge shaft and tilted forward; several drainage holes are opened at the bottom of the slag hopper 4; a water collection trough 8 for collecting wastewater passing through the drainage holes is also provided on the frame 1 directly below the slag hopper 4; a front baffle 5 is hinged to the uprights 3; when the slag hopper is placed flat on the frame, one side end of the front baffle 5 rests against the front end of the slag hopper 4; when the slag hopper 4 is tilted, the front baffle 5 is pushed open by the slag hopper 4 to form a discharge port. The design of the discharge port ensures that the slag hopper forms an effective seal with the front baffle when it is in a horizontal position, preventing the leakage of fine screenings; while when tilting, it can automatically form a sufficiently large discharge port to ensure the smooth discharge of viscous screenings.

[0016] The traveling wheels 2 include a pair of swivel wheels with locking mechanisms and a pair of fixed wheels; the swivel wheels are installed on the rear side of the frame 1; the fixed wheels are installed on the front side of the frame 1. The swivel wheels located on the rear side ensure that the trolley is guided from the rear when moving, providing high flexibility. During unloading operations, the rear swivel wheels can be locked, and the front fixed wheels provide stable support, preventing the trolley from moving back and forth during the tipping of the slag hopper, thus enhancing operational stability.

[0017] An L-shaped push rod 6 is installed at the rear of the frame 1; a handle is installed on the extended end of the push rod 6. A retaining ring 9 is also installed at the tail end of the slag hopper 2, corresponding to the push rod 6, with the axis of the retaining ring 9 horizontally positioned. The slag hopper 2 and the push rod 6 are detachably connected at the retaining ring 9 by a pin; the slag hopper 2 can only rotate relative to the frame 1 after the pin is removed. This pin-type locking mechanism is simple and reliable, provides clear locking and unlocking states, is intuitive to operate, ensures safety during transportation, and effectively prevents accidental opening under torsion spring assistance.

[0018] The drainage holes are evenly distributed on the bottom surface of the slag hopper 4. The evenly distributed drainage holes ensure that wastewater from all parts of the screenings can be quickly separated, improving drainage efficiency and uniformity, and avoiding local water accumulation.

[0019] A drain hole is also provided on the side of the frame 1; the drain hole is connected to the water collection tank; a valve 7 for controlling the opening and closing is installed at the drain hole. The valve in this embodiment is a ball valve. The design of the drain valve on the side of the frame makes it easy for operators to approach the factory drainage ditch when discharging sewage, so as to achieve civilized and fixed-point discharge and avoid environmental problems that may be caused by random discharge.

[0020] The height of the upright 3 is greater than the height of the slag hopper 4; the front baffle 5 is hinged to the upper side of the upright 3; a magnetic block made of permanent magnet material is provided at the lower part of the upright 3; the front baffle 5 is made of magnetic metal material. The design of the front baffle allows it to remain vertically closed under gravity in its natural state and to be attracted by the magnet, ensuring a reliable seal; it will only open against the magnetic force when the slag hopper is tilted and a sufficiently large thrust is applied.

[0021] The front baffle 5 is a flat plate structure, with its lower part flush with the bottom surface of the slag hopper 2. A water-stop strip is also installed on the side of the front baffle 5 facing the slag hopper 2 to prevent sewage from overflowing from the front baffle side. The water-stop strip is made of elastic rubber or silicone material, and when the front baffle is closed, it forms a tight seal with the front face of the slag hopper, effectively preventing sewage from leaking from the gaps in the high-moisture-content screenings, further enhancing the sealing performance of the equipment.

[0022] A torsion spring is also installed at the hinge shaft connecting the slag hopper 4 and the chassis 1. This torsion spring is a damping torsion spring, and when the torsion spring is in its natural state, the slag hopper 4 maintains a tilting posture relative to the chassis 1. The preload of the torsion spring is designed to provide sufficient tilting assistance for a fully loaded slag hopper to overcome the adhesion and friction of the screenings, ensuring that the unloading action is automatic, smooth, and thorough, and greatly reducing the labor intensity of the operators.

[0023] When using the utility model device in this embodiment, the following steps can be referred to: Push the trolley below the slag outlet of the bar screen, positioning the slag hopper directly below the outlet to collect the slag. After the slag falls into the hopper, some wastewater immediately flows into the bottom collection trough through the drain holes. After loading, hold the handle on the push rod and transport the device to the designated unloading point. Upon arrival at the unloading point, use your foot to deactivate the locking device on the casters to secure the trolley. The operator moves to the side of the frame and opens the drain valve on the side of the collection trough to discharge the collected wastewater into a nearby drainage ditch. Pull out the manual pin to release the lock between the push rod and the tail end of the slag hopper. Tightly connected; with the assistance of the internal torsion spring, the slag hopper automatically rises and tilts forward around the hinge axis, and its front end pushes open the front baffle during the movement to form a discharge port, and the slag slides out by gravity; after the slag is completely discharged, the operator applies a downward force to the tail of the slag hopper by pushing the rod or directly applying a downward force to overcome the torsion spring force and return the slag hopper to the horizontal position; insert the manual pin into the retaining ring to relock the slag hopper and the push rod; loosen the universal wheel lock and push the empty transfer device back under the bar screen to prepare for the next operation.

Claims

1. A transfer device for coarse screen filter residue in a wastewater treatment plant, comprising a frame (1); wheels (2) are mounted on the bottom of the frame (1); characterized in that: A pair of uprights (3) are installed on the front side of the frame (1), and the uprights (3) are arranged vertically. A slag hopper (4) is hinged on the frame (1) near the front uprights (3) via a hinge shaft. The slag hopper (4) is a bucket-shaped structure with an open front end and top. The rear end of the slag hopper (4) can be raised around the hinge shaft and tilted forward. Several drainage holes are opened at the bottom of the slag hopper (4). A water collection trough (8) for collecting sewage passing through the drainage holes is also provided on the frame (1) directly below the slag hopper (4). A front baffle (5) is hinged on the uprights (3). When the slag hopper is placed flat on the frame, one side end of the front baffle (5) is placed against the front end of the slag hopper (4). When the slag hopper (4) is tilted, the front baffle (5) is pushed open by the slag hopper (4) to form a discharge port.

2. The device for transferring screenings from coarse screens in a wastewater treatment plant according to claim 1, characterized in that: The traveling wheels (2) include a pair of swivel wheels with locking mechanisms and a pair of fixed wheels; the swivel wheels are installed on the rear side of the frame (1); the fixed wheels are installed on the front side of the frame (1).

3. The device for transferring screenings from coarse screens in a wastewater treatment plant according to claim 1, characterized in that: An L-shaped push rod (6) is provided on the rear side of the frame (1); a handle is installed on the extended end of the push rod (6).

4. A transfer device for screenings from coarse screens in a wastewater treatment plant according to claim 3, characterized in that: A retaining ring (9) is also provided at the tail end of the slag hopper (4) and at the corresponding position of the push rod (6). The axis of the retaining ring (9) is set horizontally. The slag hopper (4) and the push rod (6) are detachably connected together at the retaining ring (9) by a pin. The slag hopper (4) can only rotate relative to the frame (1) after the pin is removed.

5. A transfer device for screenings from coarse screens in a wastewater treatment plant according to claim 1, characterized in that: The drainage holes are evenly arranged on the bottom surface of the slag hopper (4).

6. A transfer device for screenings from coarse screens in a wastewater treatment plant according to claim 1, characterized in that: A drain hole is provided on the side of the frame (1); the drain hole is connected to the water collection tank; a valve (7) for controlling opening and closing is installed at the drain hole.

7. A transfer device for screenings from coarse screens in a wastewater treatment plant according to claim 1, characterized in that: The height of the upright (3) is greater than the height of the slag hopper (4); the front baffle (5) is hinged to the upper side of the upright (3); a magnetic block made of permanent magnet material is provided at the lower part of the upright (3); the front baffle (5) is made of magnetic metal material.

8. A transfer device for screenings from coarse screens in a wastewater treatment plant according to claim 1 or 7, characterized in that: The front baffle (5) is a flat plate structure, and its lower part is flush with the bottom surface of the slag hopper (4). A waterstop is also provided on the side of the front baffle (5) facing the slag hopper (4) to prevent sewage from overflowing from the side of the front baffle.

9. A transfer device for screenings from coarse screens in a wastewater treatment plant according to claim 1 or 7, characterized in that: A torsion spring is also provided at the hinge shaft connecting the slag hopper (4) and the frame (1); when the torsion spring is in its natural state, the slag hopper (4) maintains a tilting posture relative to the frame.

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