Telescopic weir plate for preventing negative water head of filter tank

Abstract

The utility model provides a telescopic weir plate for preventing negative water head of a filter tank, which relates to the technical field of effluent weir plates and comprises a portal frame, a first weir plate is fixedly mounted in the portal frame, a second weir plate is slidably clamped in the first weir plate, and four high-strength springs which are linearly distributed are fixedly mounted at the bottom end in the first weir plate. The first weir plate and the second weir plate are fixedly connected with the supporting plate, two limiting pins which are symmetrically distributed are inserted in the first weir plate and the second weir plate, a rope is fixedly installed on the supporting plate, and the other end of the rope is fixedly connected with a floating plate. The floating plate descends along with the water level and pulls the supporting plate and the limiting pins through the rope, so that the limiting pins are separated from the first weir plate and the second weir plate; at the moment, the second weir plate in the first weir plate loses limitation of the limiting pin and is subjected to resilience force of the high-strength spring, so that the second weir plate slides and ascends from the interior of the first weir plate, the filtered water level can be increased to the positive water head filtering water level, and the negative water head phenomenon and the filter material loss of the filter layer are prevented.

Description

Technical Field

[0001] This utility model mainly relates to the field of effluent weir plate technology, specifically to a retractable weir plate for preventing negative head in a filter bed. Background Technology

[0002] The effluent weir plate is a device installed at the effluent weir of the filter bed to prevent filter media loss and regulate the effluent balance. It should be made of high-strength, stable, anti-aging, non-toxic, and corrosion-resistant materials. There are three common types of effluent weirs: triangular weirs, trapezoidal weirs, and rectangular weirs. Among them, triangular weirs are divided into right-angled triangular weirs and acute-angled triangular weirs, while rectangular weirs are further divided into non-submerged rectangular weirs and submerged rectangular weirs.

[0003] The energy provided by the water level difference between the inlet and outlet of the filter bed is used for filtration. However, when the operation reaches a certain point, the water head at a certain height in the filter bed cannot overcome the head loss of filtration, resulting in a negative head phenomenon. Even if the effluent water quality is normal, it will greatly affect the normal filtration of the filter bed. Most of the existing effluent weirs are fixed weirs and cannot change the height of the weirs according to the water level changes, which will lead to the occurrence of negative head phenomenon and cause the filter media to be lost. Utility Model Content

[0004] This utility model mainly provides a retractable weir plate for preventing negative head in filter beds to solve the technical problems mentioned in the background art.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows:

[0006] A retractable weir plate for preventing negative head in a filter bed includes a gantry frame. A first weir plate is fixedly installed inside the gantry frame, and a second weir plate is slidably mounted inside the first weir plate. Four high-strength springs are fixedly installed in a straight line at the bottom of the first weir plate, with the tops of the high-strength springs contacting the bottom of the second weir plate. Two symmetrically distributed limiting pins are inserted into the first and second weir plates. A support plate is fixedly installed at one end of each of the two limiting pins, and a rope is fixedly installed on the support plate. A float plate is fixedly connected to the other end of the rope.

[0007] Furthermore, slide rails are fixedly installed on both sides of the gantry frame, and the two ends of the support plate are slidably locked in the slide rails.

[0008] Furthermore, each of the two slide rails is fixedly installed with a slide rod, and each of the two slide rods is fitted with a compression spring, with the two ends of the compression spring contacting the inner wall of the slide rail and the support plate, respectively.

[0009] Furthermore, a frame is fixedly installed at the end of each of the two slide rails away from the gantry, and the float plate is slidably engaged within the frame.

[0010] Furthermore, a first pulley is fixedly installed at the top of the frame, and a second pulley is fixedly installed on one side of the bottom of the frame, with the rope rotating and sleeved on the first and second pulleys.

[0011] Furthermore, two symmetrically distributed buffer telescopic rods are fixedly installed at the top of the gantry frame, and the bottom end of the buffer telescopic rods is fixedly connected to the top of the second weir plate.

[0012] Furthermore, an electric cylinder is fixedly installed at the top of the gantry frame, and a pressure plate is fixedly installed at the output end of the electric cylinder, and the pressure plate can contact the top of the second weir plate.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] This invention utilizes a floating plate that descends with the water level, using ropes to pull a support plate and a limiting pin. This causes the limiting pin to disengage from the first and second weir plates. At this point, the second weir plate inside the first weir plate loses the limitation of the limiting pin and is subjected to the rebound force of a high-strength spring, causing the second weir plate to slide upward from inside the first weir plate. This allows the filtered water level to be raised to a positive head filtration level, preventing negative head phenomena and the loss of filter media from the filter layer.

[0015] The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall front structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the overall side structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the cross-sectional structure of the first weir plate of this utility model;

[0019] Figure 4 for Figure 2 Enlarged view of area A.

[0020] In the diagram: 1. Gantry frame; 2. First weir plate; 3. Second weir plate; 4. Buffer telescopic rod; 5. Electric cylinder; 6. Pressure plate; 7. Limit pin; 8. Slide rail; 9. Compression spring; 10. Frame; 11. Floating plate; 12. First pulley; 13. Second pulley; 14. Rope; 15. High-strength spring; 16. Support plate; 17. Slide rod. Detailed Implementation

[0021] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, which show several embodiments of the utility model. However, the utility model can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the disclosure of the utility model more thorough and comprehensive.

[0022] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0024] For the implementation examples, please refer to the appendix. Figure 1-4 A retractable weir plate for preventing negative head in a filter bed includes a gantry frame 1. A first weir plate 2 is fixedly installed inside the gantry frame 1. A second weir plate 3 is slidably engaged inside the first weir plate 2. Four high-strength springs 15 are fixedly installed in a straight line at the bottom of the first weir plate 2, and the top of the high-strength springs 15 contacts the bottom of the second weir plate 3. Two symmetrically distributed limiting pins 7 are inserted on the first weir plate 2 and the second weir plate 3. A support plate 16 is fixedly installed at one end of the two limiting pins 7. A rope 14 is fixedly installed on the support plate 16. A float plate 11 is fixedly connected to the other end of the rope 14.

[0025] For details, please refer to the appendix. Figure 2 and 4 The gantry frame 1 is fixedly installed with slide rails 8 on both sides, and the two ends of the support plate 16 are slidably locked in the slide rails 8;

[0026] In this embodiment, it should be noted that the support plate 16 drives the limiting pin 7 to slide within the slide rail 8.

[0027] For details, please refer to the appendix. Figure 4 Each of the two slide rails 8 is fixedly installed with a slide rod 17, and each of the two slide rods 17 is fitted with a compression spring 9, and the two ends of the compression spring 9 are in contact with the inner wall of the slide rail 8 and the support plate 16 respectively.

[0028] In this embodiment, it should be noted that when the float 11 descends, the support plate 16 and the limiting pin 7 slide within the slide rail 8 using the rope 14. The support plate 16 slides along the slide rod 17 and compresses the compression spring 9. When the float 11 rises, the support plate 16 loses tension and is driven to reset by the rebound force of the compression spring 9.

[0029] For details, please refer to the appendix. Figure 1 The two slide rails 8 are fixedly installed with a frame 10 at the end away from the gantry frame 1, and the float plate 11 is slidably locked in the frame 10.

[0030] In this embodiment, it should be noted that the float 11 slides up and down within the frame 10 to prevent the float 11 from floating randomly.

[0031] For details, please refer to the appendix. Figure 1 and attached Figure 2 The frame 10 has a first pulley 12 fixedly installed at the top and a second pulley 13 fixedly installed on one side of the bottom end of the frame 10. The rope 14 is rotatably sleeved on the first pulley 12 and the second pulley 13.

[0032] In this embodiment, it should be noted that the float 11 uses the first pulley 12 and the second pulley 13 to drive the support plate 16 and the limiting pin 7 to slide within the slide rail 8 via the rope 14.

[0033] For details, please refer to the appendix. Figure 1 Two symmetrically distributed buffer telescopic rods 4 are fixedly installed at the top of the gantry frame 1, and the bottom end of the buffer telescopic rod 4 is fixedly connected to the top of the second weir plate 3.

[0034] In this embodiment, it should be noted that when the second weir plate 3 slides and rises within the first weir plate 2, the buffer telescopic rod 4 will buffer the second weir plate 3 to prevent the second weir plate 3 from being ejected from the first weir plate 2 by the rebound force of the high-strength spring 15.

[0035] For details, please refer to the appendix. Figure 2 An electric cylinder 5 is fixedly installed at the top of the gantry frame 1, and a pressure plate 6 is fixedly installed at the output end of the electric cylinder 5, and the pressure plate 6 can contact the top of the second weir plate 3.

[0036] In this embodiment, it should be noted that when the water level returns to normal, the electric cylinder 5 presses down the second weir plate 3 through the pressure plate 6, causing the second weir plate 3 to squeeze the high-strength spring 15. When the second weir plate 3 is completely inside the first weir plate 2, the support plate 16 is pushed by the rebound force of the compression spring 9 to insert the limiting pin 7 into the first weir plate 2 and the second weir plate 3 for limiting.

[0037] The specific operation method of this utility model is as follows:

[0038] In use, the height of the first weir plate 2 is lower than that of the filter layer. When the filtered water level is lower than that of the filter layer, the float plate 11 on the water surface will slide within the frame 10 as the water level drops. The float plate 11 descends via the first pulley 12 and the second pulley 13, using the rope 14 to drive the support plate 16 and the limiting pin 7 to slide within the slide rail 8. The support plate 16 slides along the slide rod 17 and compresses the spring 9, causing the limiting pin 7 to disengage from the first weir plate 2 and the second weir plate 3. At this time, the second weir plate 3 within the first weir plate 2 loses the limitation of the limiting pin 7 and is subjected to the rebound force of the high-strength spring 15, causing the second weir plate 3 to slide upward from within the first weir plate 2, thus buffering the extension. The retracting rod 4 acts as a buffer for the second weir plate 3, preventing it from being ejected from the first weir plate 2 by the rebound force of the high-strength spring 15. This allows the filtered water level to be raised to the positive head filtration level, preventing negative head phenomena and loss of filter media. When the water level returns to normal, the electric cylinder 5 presses down the second weir plate 3 through the pressure plate 6, causing the second weir plate 3 to squeeze the high-strength spring 15. When the second weir plate 3 is completely inside the first weir plate 2, the float plate 11 rises with the water level, the support plate 16 loses tension, and is pushed by the rebound force of the compression spring 9 to insert the limiting pin 7 into the first weir plate 2 and the second weir plate 3 for limiting.

[0039] The present invention has been described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvement made by adopting the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, shall be within the protection scope of the present invention.

Claims

1. A retractable weir for filter basins to prevent negative water head occurrence, comprising a portal frame (1), characterised in that: A first weir plate (2) is fixedly installed inside the gantry frame (1). A second weir plate (3) is slidably installed inside the first weir plate (2). Four high-strength springs (15) are fixedly installed at the bottom inside the first weir plate (2) in a straight line. The top of the high-strength springs (15) is in contact with the bottom of the second weir plate (3). Two symmetrically distributed limiting pins (7) are inserted on the first weir plate (2) and the second weir plate (3). A support plate (16) is fixedly installed at one end of the two limiting pins (7). A rope (14) is fixedly installed on the support plate (16). A float plate (11) is fixedly connected to the other end of the rope (14).

2. A retractable weir plate for preventing negative head occurrence in a filter tank according to claim 1, characterized in that, The gantry frame (1) is fixedly installed with slide rails (8) on both sides, and the two ends of the support plate (16) are slidably locked in the slide rails (8).

3. A retractable weir plate for preventing negative head occurrence in a filter tank according to claim 2, characterized in that, Each of the two slide rails (8) is fixedly installed with a slide rod (17), and each of the two slide rods (17) is fitted with a compression spring (9), and the two ends of the compression spring (9) are in contact with the inner wall of the slide rail (8) and the support plate (16) respectively.

4. A retractable weir plate for preventing negative head occurrence in a filter tank according to claim 2, characterized in that, The two slide rails (8) are fixedly installed with a frame (10) at one end away from the gantry (1), and the float (11) is slidably locked in the frame (10).

5. A retractable weir plate for preventing negative head occurrence in a filter tank according to claim 4, characterized in that, The frame (10) is fixedly installed with a first pulley (12) at the top and a second pulley (13) is fixedly installed on one side of the bottom end of the frame (10). The rope (14) is rotated and sleeved on the first pulley (12) and the second pulley (13).

6. A retractable weir plate for preventing negative head occurrence in a filter tank according to claim 1, characterized in that, The top of the gantry (1) is fixedly equipped with two symmetrically distributed buffer telescopic rods (4), and the bottom end of the buffer telescopic rods (4) is fixedly connected to the top of the second weir plate (3).

7. A retractable weir plate for preventing negative head occurrence in a filter tank according to claim 1, characterized in that, An electric cylinder (5) is fixedly installed at the top of the gantry (1), and a pressure plate (6) is fixedly installed at the output end of the electric cylinder (5), and the pressure plate (6) can contact the top of the second weir plate (3).

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