A device for preventing derailment of a suction dredger

Abstract

The utility model discloses a kind of suction dredger anti derailment devices, including with the electric flatcar frame of suction dredger connection, the mounting bracket of electric flatcar frame lower end installation, with the guide rail of roller directional movement and roller connection, transmission mechanism is connected between the mounting bracket and the roller, the transmission mechanism includes with the installation cylinder of roller connection and with the touch plate of installation cylinder swing connection, the touch plate is located above the travel switch fixed on electric flatcar frame;Scraping blade is equipped on the outside of the installation cylinder.The utility model utilizes the offset of roller on guide rail to drive the transmission mechanism and timely touch travel switch response, to shut down the movement of roller in time;Meanwhile, set up scraping blade to remove sundries on guide rail, and can avoid instantaneous derailment when roller is offset, convenient for the reset maintenance of roller and suction dredger.

Description

Technical Field

[0001] This utility model relates to the technical field of sludge suction machines for water plants, and in particular to a sludge suction machine anti-derailment device. Background Technology

[0002] In water treatment plants, sedimentation tanks are regularly dredged using sludge suction machines to remove bottom sludge. These machines, spanning both sides of the sedimentation tank, move back and forth between the inlet and outlet using rollers and guide rails on either side. A lift pump mounted on a support extending into the tank bottom cleans the sludge. This system plays a crucial role in the water treatment plant's operation. However, during routine use, the rollers may derail. Specific reasons include: inconsistent travel speeds of the two motors; uneven wear on the roller tracks leading to deviations in travel distance; uneven sludge thickness at the bottom of the sedimentation tank causing uneven resistance at both ends of the suction machine; malfunctions in the motor, reducer, or coupling causing unilateral operation; and wheel slippage. Furthermore, resetting the machine after derailment is difficult, time-consuming, and requires significant manpower and resources. It also damages the suction machine, severely hindering the normal operation of the water treatment plant. Utility Model Content

[0003] In view of the shortcomings of the prior art, the technical problem to be solved by this utility model is to provide a mud suction machine anti-derailment device that can stop moving in time when the roller deviates on the guide rail.

[0004] To solve the above-mentioned technical problems, the present invention provides a technical solution as follows: a sludge suction machine anti-derailment device, comprising an electric flatcar frame connected to the sludge suction machine, a mounting frame installed at the lower end of the electric flatcar frame, rollers connected to the mounting frame, and a guide rail for directional movement of the rollers. A transmission mechanism is provided between the mounting frame and the rollers. The transmission mechanism includes a mounting cylinder connected to the rollers and a contact plate movably connected to the mounting cylinder. The contact plate is located above a limit switch fixed on the electric flatcar frame. A scraper is provided on the outer side of the mounting cylinder.

[0005] With the above structure, when the roller moves off track on the guide rail, it will simultaneously drive the movable contact plate to move downwards to contact the limit switch, so that the limit switch can be quickly closed to stop the movement of the roller. This effectively prevents the roller from derailing, allowing the roller to be adjusted and restored to its original position, improving repair efficiency and ensuring the normal production of the water plant. In addition, the scraper can promptly remove debris from the guide rail, preventing the roller from bouncing and derailing. At the same time, it will create a blocking effect between the roller and the guide rail at the first moment of roller deviation, which can also effectively prevent the roller from instantly detaching from the guide rail.

[0006] To simplify the structure and facilitate installation, preferably, a connecting frame is provided inside the mounting cylinder, with one side connected to the roller and the other side of the connecting frame abutting against one side of the compression spring; a pressure cap is screwed onto the mounting cylinder at a position corresponding to the side of the compression spring, and a directional hole is provided on the pressure cap, with the other side of the compression spring extending into the directional hole and the extended end of the compression spring abutting against the bottom of the directional hole.

[0007] To facilitate timely response of the limit switch to the closing signal, preferably, a horizontally extending contact plate is hinged to one side of the connecting frame. A clearance hole is provided on the mounting cylinder at the position corresponding to the contact plate. The upper end face of the contact plate is attached to the upper wall of the clearance hole and extends out from the clearance hole. The upper end of the limit switch is provided with a contact rod, and the extended end of the contact plate is located above the contact rod. The lower end of the contact plate is connected to one side of a tension spring, and the other side of the tension spring is connected to the outer wall of the connecting frame.

[0008] To reduce the travel of the trigger response limit switch and simplify the structure, preferably, a downward protruding boss is provided at the lower end of the contact plate directly above the contact rod to prevent the roller from derailing.

[0009] To prevent the roller from momentarily derailing and to effectively drive the contact plate to contact the limit switch's contact rod, preferably, the roller surface is provided with a tapered groove that is narrower on the inside and wider on the outside along the circumferential direction.

[0010] To facilitate the removal of debris from the guide rail and simplify the structure, preferably, two scrapers are symmetrically and obliquely positioned on the outside of the mounting cylinder along the moving direction. The lower end of each scraper has a horizontal section that fits against the upper end of the guide rail.

[0011] To facilitate the rotation of the roller, preferably, a power motor is also provided on the connecting frame, and the output end of the power motor is connected to a connecting shaft passing through the middle of the roller.

[0012] To facilitate automated control, preferably, both the limit switch and the power motor are connected to a PLC controller fixed on the electric flatcar frame.

[0013] To facilitate the timely issuance of fault signals in the event of deviation or derailment, preferably, a warning light fixed to the electric flatcar frame is also connected to one side of the PLC controller.

[0014] Beneficial effects: This utility model utilizes the offset of the roller on the guide rail to drive the transmission mechanism to trigger the limit switch in a timely manner so as to stop the movement of the roller in time; at the same time, the scraper is set to remove debris on the guide rail and can prevent the roller from momentarily derailing when it is offset, which facilitates the reset and maintenance of the roller and the sludge suction machine. Attached Figure Description

[0015] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic diagram of the installation structure of this utility model.

[0016] Figure 2 This is a schematic diagram of the scraper installation structure.

[0017] Figure 3 This is a schematic diagram of the roller derailment.

[0018] The meanings of the labels in the attached diagram are as follows: Electric flatcar frame-1; mounting bracket-10; rollers-11; Mounting cylinder-2; Contact plate-20; Boss-201; Connecting bracket-21; Compression spring-22; Pressure cap-23; Orientation hole-231; Scraper-25; Tension spring-26; Clearance hole-27; Limit switch-3; Contact rod-30; Power motor-31; Connecting shaft-32; Guide rail-4; PLC controller-5; Warning light-50. Detailed Implementation

[0019] Depend on Figure 1 , Figure 2 and Figure 3 As shown, this utility model includes an electric flatbed cart frame 1 connected to a sludge suction machine, a mounting frame 10 installed at the lower end of the electric flatbed cart frame 1, rollers 11 connected to the mounting frame 10, and a guide rail 4 for directional movement of the rollers 11. The rollers 11 have a tapered groove with a narrow inner diameter and a wide outer diameter around their circumference. A transmission mechanism is provided between the mounting frame 10 and the rollers 11. The transmission mechanism includes a mounting cylinder 2 connected to the rollers 11 and a contact plate 20 movably connected to the mounting cylinder 2. The contact plate 20 is located above a limit switch 3 fixed on the electric flatbed cart frame 1. A scraper 25 is provided on the outer side of the mounting cylinder 2.

[0020] Specifically, a connecting frame 21 is provided inside the mounting cylinder 2, one side of which is connected to the roller 11, and the other side of the connecting frame 21 abuts against one side of the compression spring 22; a pressure cap 23 is screwed onto the mounting cylinder 2 at a position corresponding to one side of the compression spring 22, and a directional hole 231 is provided on the pressure cap 23, the other side of the compression spring 22 extends into the directional hole 231, and the extended end of the compression spring 22 abuts against the bottom of the directional hole 231.

[0021] A horizontally extending contact plate 20 is hinged to one side of the connecting frame 21. A clearance hole 27 is provided on the mounting cylinder 2 at the position corresponding to the contact plate 20. The upper end face of the contact plate 20 is attached to the upper end wall of the clearance hole 27 and extends out from the clearance hole 27. A contact rod 30 is provided at the upper end of the limit switch 3. The extended end of the contact plate 20 is located above the contact rod 30. The lower end of the contact plate 20 is connected to one side of the tension spring 26. The other side of the tension spring 26 is connected to the outer side wall of the connecting frame 21. A downward protruding boss 201 is provided on the lower end face of the contact plate 20 at the position directly above the contact rod 30.

[0022] Two scrapers 25 are symmetrically and obliquely arranged on the outside of the mounting cylinder 2 along the moving direction. The lower end of each scraper 25 is a horizontal section, which is fitted to the upper end of the guide rail 4.

[0023] A power motor 31 is also provided on the connecting frame 21. The output end of the power motor 31 is connected to a connecting shaft 32 that passes through the middle of the roller 11. The limit switch 3 and the power motor 31 are both connected to the PLC controller 5 fixed on the electric flatcar frame 1.

[0024] A warning light 50, which is fixed to the electric flatcar frame 1, is also connected to one side of the PLC controller 5.

[0025] The working principle of this utility model is as follows: like Figures 1 to 3 As shown, during installation, two guide rails 4 are set on the side of the sedimentation tank. Correspondingly, two rollers 11 are set on the lower end of the electric flatcar frame 1. The rollers 11 at the corresponding ends are placed on the guide rails 4. The left and right sides of the tapered grooves around the wheel surface of the rollers 11 abut against the left and right edges of the upper left and right sides of the guide rails 4, respectively. The abutment position is located in the middle of the tapered groove wall, which can prevent the rollers from shifting to one side. At the same time, it provides sufficient displacement distance for the offset to drive the contact plate 20 to move and trigger the response limit switch 3. In addition, the tension spring 26 can prevent the contact plate 20 from moving downward due to gravity and triggering the response limit switch 3, ensuring the accuracy of the warning.

[0026] In use, the two rollers 11 rotate and move simultaneously on the guide rail 4 under the drive of the two power motors 31, synchronously driving the electric flatcar frame 1 to move above the sedimentation tank, so that the sludge suction machine can remove the sludge and sand in the sedimentation tank one by one. During this process, the lower end face of the scraper 25 keeps in contact with the upper end face of the guide rail 4, which can remove debris on the guide rail 4 in time during movement and ensure the smooth movement of the rollers 11.

[0027] As usage progresses, taking the inconsistent travel speeds of the two motors 31 (due to differences in power loss) as an example, the displacement distances of the two rollers 11 will differ. This causes the roller on the side with the forward displacement to be restrained by the roller on the other side and thus deviate. In the initial stage of this deviation, the contact between the lower end face of the scraper 25 and the upper end face of the guide rail 4 acts as a buffer against the unilateral deviation. When the deviation is insufficient, the electric flatcar frame 1 tilts to the left and right in the direction of movement, and the rollers 11 can still remain on the guide rail. 4. Moving upwards, at this time, the rollers 11 at both ends form an oblique forward movement state. The roller 11 on the forward side moves upwards a certain distance, synchronously driving the connecting frame 21 to move upwards and compress the compression spring 22. Since in the initial state, the upper end face of the contact plate 20 is attached to the upper end hole wall of the relief hole 27 and extends out from the relief hole 27, the upward movement of the connecting frame 21 causes the contact plate 20 hinged to the connecting frame 21 to start rotating counterclockwise and approaching the limit switch 3. At this time, only one side of the conical groove of the roller 11 is in contact with the guide rail 4 (e.g., Figure 3 As shown in Figure a), the force is applied to one side only. If the deviation continues, a derailment accident will occur. However, at this time, the rotational displacement of the contact plate 20 is insufficient to drive the boss 201 to touch the contact rod 30. During the movement, friction noise will be emitted due to the increased friction on one side. If the staff hears continuous friction noise, they should immediately turn off the limit switch 3 and carry out relevant inspections and repairs to eliminate safety hazards in the early stage of the fault.

[0028] If the offset of roller 11 is large, causing one side of the tapered groove of roller 11 to move completely to the upper end face of guide rail 4, that is, roller 11 moves up to the maximum offset position (e.g. Figure 3 As shown in Figure b), the connecting frame 21 moves upward and compresses the compression spring 22. Finally, the boss 201 contacts and abuts against the contact rod 30. The limit switch 3 sends a signal to the PLC controller, which then sends a shutdown command to both power motors 31 to quickly stop the rotation of the roller 11 and effectively prevent the roller 11 from derailing. At the same time, the PLC controller 5 also sends an activation command to the warning light 50 to remind the staff to check and repair in time. After repair, under the elastic force of the tension spring 26, the upper end face of the contact plate 20 continues to be in contact with the upper end wall of the clearance hole 27.

[0029] If no friction noise is emitted when there is a small deviation, it can continue to be used without affecting the mud suction operation. If the deviation increases, one side of the roller 11 will still move to the upper surface of the guide rail 4. In the end, the PLC controller will send a shutdown command to both power motors 31 at the same time to quickly stop the rotation of the roller 11, which can also effectively prevent the roller 11 from derailing.

[0030] For other derailment caused by usage malfunctions, it is also necessary to move one side of the roller onto the guide rail 4 before derailment occurs. The usage principle is the same as in this embodiment. This will drive the mounting cylinder 2 to move upward and make the contact plate 20 rotate, so that the boss 201 contacts the contact rod 30. The limit switch 3 sends a signal to the PLC controller, and the PLC controller simultaneously sends a shutdown command to the two power motors 31 to quickly stop the rotation of the roller 11 and effectively prevent the roller 11 from derailing.

Claims

1. A derailment prevention device for a sludge suction machine, comprising an electric flatcar frame (1) connected to the sludge suction machine, a mounting frame (10) installed at the lower end of the electric flatcar frame (1), rollers (11) connected to the mounting frame (10), and a guide rail (4) for directional movement of the rollers (11), characterized in that: A transmission mechanism is provided between the mounting frame (10) and the roller (11). The transmission mechanism includes a mounting cylinder (2) connected to the roller (11) and a contact plate (20) movably connected to the mounting cylinder (2). The contact plate (20) is located above the limit switch (3) fixed on the electric flatcar frame (1). A scraper (25) is provided on the outside of the mounting cylinder (2).

2. The anti-derailment device for a sludge suction machine as described in claim 1, characterized in that: Inside the mounting cylinder (2), there is a connecting frame (21) connected to the roller (11) on one side, and the other side of the connecting frame (21) abuts against one side of the compression spring (22); a pressure cap (23) is screwed onto the mounting cylinder (2) at a position corresponding to the side of the compression spring (22), and a directional hole (231) is provided on the pressure cap (23). The other side of the compression spring (22) extends into the directional hole (231), and the extended end of the compression spring (22) abuts against the bottom of the directional hole (231).

3. The anti-derailment device for a sludge suction machine as described in claim 2, characterized in that: A horizontally extending contact plate (20) is hinged to one side of the connecting frame (21). A clearance hole (27) is provided on the mounting cylinder (2) at the position corresponding to the contact plate (20). The upper end face of the contact plate (20) is attached to the upper end wall of the clearance hole (27) and extends out from the clearance hole (27). A contact rod (30) is provided at the upper end of the limit switch (3). The extended end of the contact plate (20) is located above the contact rod (30). The lower end of the contact plate (20) is connected to one side of the tension spring (26), and the other side of the tension spring (26) is connected to the outer wall of the connecting frame (21).

4. The anti-derailment device for a sludge suction machine as described in claim 3, characterized in that: A downward protruding boss (201) is provided on the lower end face of the contact plate (20) at a position directly above the contact rod (30).

5. The anti-derailment device for a sludge suction machine as described in claim 1, characterized in that: The roller (11) has a tapered groove that is narrower inside and wider outside along the circumferential direction.

6. The anti-derailment device for a sludge suction machine as described in claim 1, characterized in that: Two scrapers (25) are symmetrically placed obliquely in front and behind the outside of the mounting cylinder (2) along the moving direction. The lower end of each scraper (25) is a horizontal section, which is fitted to the upper end of the guide rail (4).

7. The anti-derailment device for a sludge suction machine as described in claim 2, characterized in that: A power motor (31) is also provided on the connecting frame (21), and the output end of the power motor (31) is connected to a connecting shaft (32) that passes through the middle of the roller (11).

8. The anti-derailment device for a sludge suction machine as described in claim 7, characterized in that: The limit switch (3) and the power motor (31) are both connected to the PLC controller (5) fixed on the electric flatcar frame (1).

9. The anti-derailment device for a sludge suction machine as described in claim 8, characterized in that: One side of the PLC controller (5) is also connected to a warning light (50) fixed on the electric flatcar frame (1).

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