Backpressure plate assembly

Abstract

The utility model discloses a back pressure plate assembly which is sleeved on a spiral shaft in a sludge discharge part of a stacked spiral sludge dewatering machine and comprises a back pressure plate, a limiting base, a thrust screw rod, a limiting screw rod, a spring and an adjusting nut. Sludge can be controlled to be discharged out of the stacked spiral type sludge dewatering machine under the action of the spring, sludge with the required water content is stably obtained, and the stacked spiral type sludge dewatering machine has certain production and application value. The device is convenient and fast to install, and the spring force is convenient and fast to adjust.

Description

Technical Field

[0001] The utility model relates to the field of sludge dehydration, in particular to a back pressure plate component. Background Art

[0002] The spiral stacking sludge dewatering machine is an excellent mud and water dewatering equipment, which is mainly composed of a coagulation box and a spiral stacking sludge dewatering machine host. Among them, the spiral stacking sludge dewatering machine host has a standardized product manufacturing standard JB / T12578-2015. The advantages of the equipment are: low dehydration energy consumption, self-cleaning filter surface, stable operation, small footprint, and relatively simple control and management.

[0003] During operation, the distance between the back pressure plate and the mud outlet panel of a conventional screw stack sludge dewatering machine is fixed. If the moisture content of the mud entering the screw stack sludge dewatering machine changes significantly, it is very likely to cause a significant change in the moisture content of the sludge discharged from the screw stack sludge dewatering machine, and even affect the normal production and operation of the screw stack sludge dewatering machine.

[0004] The patent name is a technology described in a screw stack sludge dewatering machine host (patent number 2022216840540), and a screw stack sludge dewatering machine was designed and manufactured. Good results have been achieved in actual production. The screw stack sludge dewatering machine operates stably, and the moisture content of the discharged sludge is stable and maintained at a low level. Under the premise of a certain amount of dry sludge, the moisture content of the sludge is low, the sludge weight is small, and the sludge disposal cost required is less. Therefore, the screw stack sludge dewatering machine using the patented technology (patent number 2022216840540) has a high production application value.

[0005] In actual production applications, it was found that the spiral sludge dewatering machine using patented technology (patent number 2022216840540) had the following problems:

[0006] (1) The installation scenario of the limit base is limited. Before installing the limit base, you need to use lifting equipment to remove the reducer of the screw stack sludge dewatering machine, and then install the limit base. After installing the limit base, you also need to reinstall the reducer. Generally, there is no lifting equipment at the production site of the screw stack sludge dewatering machine user, which restricts the rapid promotion and application of the patented technology (patent number 2022216840540).

[0007] (2) The spring force adjustment is inconvenient. Due to technical defects, a jack is required to adjust the compression length of the spring in the mud discharge section of the spiral sludge dewatering machine. Place the jack in the mud discharge section, with one end of the jack contacting the mud discharge panel that is close to the reducer, and the other end contacting the limit base. Loosen the fastening bolts on the limit base, start the jack, and move the limit base toward the back pressure plate to compress the spring length, and then adjust the spring force to the required value. Finally, tighten the fastening bolts on the limit base to fix the limit base on the spiral shaft. The entire spring force adjustment process is cumbersome and inconvenient, and the risk of the jack falling must be prevented.

[0008] (3) The distance between the back pressure plate and the mud outlet panel is not controlled. Since the distance between the back pressure plate and the mud outlet panel is only restricted by the spring and there is no fixed limiting component, the distance between the back pressure plate and the mud outlet panel may exceed the limit value, thereby affecting the control of sludge moisture content.

[0009] The utility model aims to solve the implementation problems existing in the production application of the patented technology (patent number 2022216840540). Utility Model Content

[0010] The utility model aims to solve the deficiencies of the prior art and provide a back pressure plate assembly.

[0011] To achieve this purpose, the utility model adopts the following technical solutions:

[0012] A back pressure plate assembly is sleeved on the spiral shaft in the mud discharge part of the spiral stacking sludge dewatering machine, including a back pressure plate, a limit base, a thrust screw, a limit screw, a spring and an adjusting nut. The back pressure plate and the limit base are sleeved on the spiral shaft. The limit base is provided with a hole for the thrust screw to pass through. The limit base is provided with a hole for the limit screw to pass through. The limit base is provided with a fastening bolt. One end of the thrust screw is provided with a thread. One end of the limit screw is provided with a thread. The back pressure plate, the adjusting nut, the spring and the limit base are arranged in sequence along the direction of the spiral shaft. The adjusting nut, the spring and the limit base are all sleeved on the thrust screw. The limit base is sleeved on the limit screw.

[0013] Preferably, the limiting base is composed of at least two movable parts, and the movable parts can be fixedly connected by fastening bolts.

[0014] Preferably, a positioning piece is further included, and the positioning piece is welded or bonded with glue or double-sided tape to a side of the back pressure plate close to the limiting base.

[0015] Preferably, it also includes a pad, and the back pressure plate, adjusting nut, pad, spring, and limit base are arranged in sequence along the direction of the screw axis, and the adjusting nut, pad, spring, and limit base are all mounted on the thrust screw.

[0016] Preferably, the number of the thrust screws is 2 to 4.

[0017] Preferably, the adjusting nut is a locking nut.

[0018] Based on the above technical solutions, the beneficial effects of the utility model are:

[0019] (1) Without using lifting equipment, the limit base of the utility model can be installed on or removed from the screw shaft. The utility model is very convenient to install on the already produced screw stacking sludge dewatering machine, without disassembling the reducer and using lifting equipment.

[0020] (2) The spring force of the utility model can be adjusted conveniently and quickly. The spring length can be adjusted by rotating the adjusting nut, and then the spring force can be adjusted without using a jack.

[0021] (3) The distance between the back pressure plate and the mud outlet panel is limited by the limiting screw and will not exceed the limit value, which is conducive to controlling the moisture content of the sludge.

[0022] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the utility model more obvious and easy to understand, the following preferred embodiments are specifically cited and described in detail with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the structure of the utility model Figure 1 .

[0024] Figure 2 This is a schematic diagram of the structure of the utility model Figure 2 .

[0025] Figure 3 It is a schematic diagram of a limiting base of the utility model.

[0026] In the figure: back pressure plate 10, limiting base 20, fastening bolt 21, hole 22, thrust screw 30, adjusting nut 31, limiting screw 40, nut 41, spring 50, positioning member 60, pad 70, screw stacking sludge dewatering machine 80, mud discharge part 81, mud outlet panel 82, screw shaft 83, reducer 84. DETAILED DESCRIPTION

[0027] like Figure 1 , Figure 2 , Figure 3As shown, a back pressure plate assembly is mounted on a screw shaft 83 in a mud discharge part 81 of a screw stacking sludge dewatering machine 80, comprising a back pressure plate 10, a limiting base 20, a thrust screw 30, a limiting screw 40, a spring 50 and an adjusting nut 31. The back pressure plate 10 and the limiting base 20 are mounted on the screw shaft 83, the limiting base 20 is provided with a hole 22 for the thrust screw 30 to pass through, and the limiting base 20 is provided with a spring 50 for the limiting screw 40 to pass through. The hole 22 passing through the limit base 20 is provided with a fastening bolt 21, one end of the thrust screw 30 is provided with a thread, one end of the limit screw 40 is provided with a thread, and the back pressure plate 10, the adjusting nut 31, the spring 50, and the limit base 20 are arranged in sequence along the direction of the screw shaft 83, and the adjusting nut 31, the spring 50, and the limit base 20 are all sleeved on the thrust screw 30, and the limit base 20 is sleeved on the limit screw 40. In the utility model, the thrust screw 30 can move back and forth in the hole 22 of the limit base 20 without rotating. The adjusting nut 31 on the rotating thrust screw 30 moves toward the limit base 20, which can compress the spring 50 and increase the spring tension. The adjusting nut 31 on the rotating thrust screw 30 is away from the limit base 20, which can relax the spring 50 and reduce the spring tension. When the adjusting nut 31 is a locking nut, the rotational resistance of the adjusting nut 31 on the thrust screw 30 is large, which can prevent the adjusting nut 31 from rotating relative to the thrust screw 30 due to vibration and other reasons to a certain extent, thereby changing the compression length of the spring 50 and changing the spring tension. When the inner diameter of the hole 22 set on the limiting base 20 for the limiting screw 40 to pass through is larger than the diameter of the limiting screw 40, the limiting screw 40 is conveniently inserted into the hole 22 of the limiting base 20. At this time, nuts 41 are set on both sides of the limiting base 20 on the limiting screw 40, and the rotating nut 41 is close to the limiting base 20 to ensure that the relative distance between one end of the limiting screw 40 and the back pressure plate 10 remains stable. When the hole 22 for the limiting screw 40 to pass through is a threaded hole, the limiting screw 40 rotates and enters the threaded hole of the limiting base 20. At this time, nuts 41 are provided on both sides of the limiting screw 40 located on the limiting base 20. The rotating nuts 41 are close to the limiting base 20 to ensure that the relative distance between one end of the limiting screw 40 and the back pressure plate 10 remains stable. When the nut 41 is a locking nut, the rotation resistance of the nut 41 on the limiting screw 40 is large, which can prevent the nut 41 from rotating relative to the limiting screw 40 due to vibration and other reasons to a certain extent. The distance that the back pressure plate 10 moves toward the limiting base 20 is limited by the limiting screw 40. In daily production use, it can be set that the relative distance between the end of the thrust screw 30 close to the back pressure plate 10 and the back pressure plate 10 is 4 to 20 mm smaller than the relative distance between the end of the limiting screw 40 close to the back pressure plate 10 and the back pressure plate 10.In the utility model, the limit base 20 is sleeved on the spiral shaft 83, and the limit base 20 is pushed toward the back pressure plate 10, so that one end of the thrust screw 30 is in close contact with the back pressure plate 10, and the back pressure plate 10 is in close contact with the mud outlet panel 82, and the fastening bolts 21 on the limit base 20 are tightened to fix the limit base 20 on the spiral shaft 83. The back pressure plate 10 is in close contact with the mud outlet panel 82 in the spiral stacking type sludge dewatering machine 80 equipped with the back pressure plate assembly of the utility model. When the spiral stacking type sludge dewatering machine 80 is running, the sludge in the spiral stacking body needs to be discharged from the spiral stacking body to push the back pressure plate 10 to move toward the limit base 20, so that a gap appears between the back pressure plate 10 and the mud outlet panel 82. When the sludge pushes the back pressure plate 10 to move toward the limiting base 20, the back pressure plate 10 will contact one end of the limiting screw 40. At this time, the gap width between the back pressure plate 10 and the mud outlet panel 82 is the largest, reaching the limit value (4-20 mm). The utility model can control the sludge to be discharged from the stacked screw sludge dewatering machine 80 under the action of the spring, stably obtain the sludge with the required moisture content, and has certain production application value.

[0028] Specifically, Figure 1 , Figure 2 , Figure 3 As shown, the position limiting base 20 is composed of at least two movable parts, and each movable part can be fixedly connected by a fastening bolt 21. In the utility model, the position limiting base 20 is composed of at least two movable parts, and each movable part can be fixedly connected by a fastening bolt 21, or can be fixedly connected by a fastener and a fastening bolt 21. In the utility model, the position limiting base 20 can be installed on the screw shaft 83 or removed from the screw shaft 83 without using a lifting device and without disassembling the reducer 84 of the screw stacking sludge dewatering machine 80. The utility model is very convenient to install on the screw stacking sludge dewatering machine 80 that has been produced.

[0029] Specifically, Figure 1 , Figure 2 As shown, it also includes a positioning member 60, which is welded or glued or double-sided adhesive to the side of the back pressure plate 10 close to the limiting base 20. In the utility model, the positioning member 60 is a metal product or non-metal product with holes. When the positioning member 60 is a metal product, the positioning member 60 can be welded or glued or double-sided adhesive to the side of the back pressure plate 10 close to the limiting base 20. When the positioning member 60 is a non-metal product, the positioning member 60 can be glued or double-sided adhesive to the side of the back pressure plate 10 close to the limiting base 20. In the utility model, one end of the thrust screw 30 can be inserted into the hole of the positioning member 60 to ensure that when the screw shaft 83 rotates clockwise or counterclockwise, the rotation angular velocity of the screw shaft 83, the back pressure plate 10 and the limiting base 20 is consistent, so as to prevent the wear of the screw shaft 83 caused by the inconsistent rotation angular velocity of the back pressure plate 10 and the screw shaft 83.

[0030] Specifically, Figure 1 , Figure 2 As shown, it also includes a backing plate 70, and the backing plate 10, the adjusting nut 31, the backing plate 70, the spring 50, and the limiting base 20 are arranged in sequence along the direction of the screw shaft 83, and the adjusting nut 31, the backing plate 70, the spring 50, and the limiting base 20 are all sleeved on the thrust screw 30. In the utility model, when the inner diameter of the spring 50 used is larger than the adjusting nut 31, it is necessary to set the backing plate 70 between the adjusting nut 31 and the spring 50, and the backing plate 70 is sleeved on the thrust screw 30.

[0031] Specifically, Figure 1 , Figure 2 As shown, the number of the thrust screws 30 is 2 to 4. Considering the force balance, the utility model is provided with 2 to 4 thrust screws 30, and the thrust screws 30 are evenly distributed around the axis of the screw shaft 83.

[0032] Specifically, Figure 1 , Figure 2 As shown, the adjusting nut 31 is a locking nut. In the present invention, the adjusting nut 31 is a locking nut, and the adjusting nut 31 has a large rotation resistance on the thrust screw 30, which can prevent the adjusting nut 31 from rotating relative to the thrust screw 30 due to vibration and other reasons to a certain extent, thereby changing the compression length of the spring 50 and changing the spring tension.

[0033] like Figure 1 , Figure 2 As shown, the working process of the utility model is:

[0034] The back pressure plate assembly of the utility model is mounted on the spiral shaft 83 in the mud discharge part 81 of the spiral stacking sludge dewatering machine 80, and the limiting base 20 is pushed toward the back pressure plate 10, so that one end of the thrust screw 30 is inserted into the hole of the positioning member 60, so that the back pressure plate 10 is in close contact with the mud outlet panel 82, and the fastening bolt 21 on the limiting base 20 is tightened to fix the limiting base 20 on the spiral shaft 83. Start the spiral stacking sludge dewatering machine 80, and the sludge in the spiral stacking body pushes the back pressure plate 10 to move toward the limiting base 20, so that a gap appears between the back pressure plate 10 and the mud outlet panel 82, and the sludge is discharged from the spiral stacking body along the gap between the back pressure plate 10 and the mud outlet panel 82, and then discharged from the spiral stacking sludge dewatering machine 80. When the sludge pushes the back pressure plate 10 to move until it contacts the limiting screw 40, the gap width between the back pressure plate 10 and the mud outlet panel 82 reaches the maximum limit value.

[0035] The above is a specific implementation method of the utility model, which is only used to illustrate the technical solution of the utility model rather than to limit it. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the utility model, and these improvements and modifications are also regarded as the protection scope of the utility model.

Claims

1. A back pressure plate assembly, mounted on a spiral shaft in a sludge discharge section of a spiral stack sludge dewatering machine, characterized in that: It includes a back pressure plate, a limit base, a thrust screw, a limit screw, a spring and an adjusting nut. The back pressure plate and the limit base are sleeved on the spiral shaft. The limit base is provided with a hole for the thrust screw to pass through. The limit base is provided with a hole for the limit screw to pass through. The limit base is provided with a fastening bolt. One end of the thrust screw is provided with a thread. One end of the limit screw is provided with a thread. The back pressure plate, the adjusting nut, the spring and the limit base are arranged in sequence along the direction of the spiral shaft. The adjusting nut, the spring and the limit base are all sleeved on the thrust screw. The limit base is sleeved on the limit screw.

2. A back pressure plate assembly according to claim 1, characterized in that: The limiting base is composed of at least two movable parts, and the movable parts can be fixedly connected by fastening bolts.

3. A back pressure plate assembly according to claim 1, characterized in that: It also includes a positioning piece, which is welded or bonded with glue or double-sided tape to one side of the back pressure plate close to the limiting base.

4. A back pressure plate assembly according to claim 1, characterized in that: It also includes a backing plate, and the back pressure plate, adjusting nut, backing plate, spring, and limiting base are arranged in sequence along the direction of the screw axis. The adjusting nut, backing plate, spring, and limiting base are all mounted on the thrust screw.

5. The back pressure plate assembly according to claim 1, characterized in that: The number of the thrust screws is 2 to 4.

6. A back pressure plate assembly according to claim 1, characterized in that: The adjusting nut is a locking nut.

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