A back pressure mechanism easy to assemble and disassemble and convenient to adjust and a spiral dewatering machine

Abstract

A back pressure mechanism easy to assemble and disassemble and convenient to adjust and a spiral dewatering machine, the back pressure mechanism is arranged in a mud outlet box of the spiral dewatering machine, comprising: a rotating member, comprising: a sleeve and an incomplete mud scraping member, the middle part of the mud scraping member is provided with a round hole, the front end of the sleeve is fixedly connected with the round hole in butt joint; the sleeve is fixed on the central shaft of the spiral shaft of the spiral dewatering machine; a fixed sealing plate is spliced by an upper sealing plate and a lower sealing plate, and each end of the upper sealing plate and the lower sealing plate is provided with a fixing member; sealing plate positioning blocks are arranged on the left and right side walls of the mud outlet box, long strip holes are formed in the sealing plate positioning blocks, and the fixing members of the upper sealing plate and the lower sealing plate are fixed with the long strip holes on the sealing plate positioning blocks through first fixing elements; the fixed sealing plate is sleeved on the sleeve and arranged at the front end close to the mud scraping member. The present application can realize flexible assembly and disassembly, adjustment, anti-displacement, balanced stress and convenient maintenance.

Description

Technical Field

[0001] This invention belongs to the technical field of sludge dewatering equipment, specifically referring to a back pressure mechanism and a spiral dewatering machine that are easy to install, disassemble, and adjust. Background Technology

[0002] Spiral dewatering machines, as a highly efficient sludge dewatering equipment, are widely used in municipal and industrial sludge treatment scenarios. Their back pressure mechanism, located at the sludge outlet, controls the discharge of sludge. The back pressure mechanism is a core component for controlling the moisture content of the sludge cake and ensuring effective dewatering.

[0003] Chinese invention patent 202510029872.9 discloses an improved back pressure plate, wherein the back pressure mechanism includes an incomplete sealing plate rotating component and a back pressure plate sealing plate, which belongs to a dynamic-static combined back pressure mechanism, and its main technical defects are as follows: 1. Poor structural stability: The incomplete sealing plate rotating part has a sleeve part that is sleeved on the spiral shaft. The sleeve part has screw holes. Screws are used to pass through the screw holes and abut against the spiral shaft for fixation. In this way, the screws are easy to slip and fall off, which causes the back pressure mechanism to shift and affects the mud discharge pressure and dewatering effect. 2. Cumbersome assembly, adjustment and maintenance: The fixed sealing plate is locked to the front support plate of the mud outlet by multiple screws around it. In order to adapt to different working conditions, if it is necessary to adjust the size of the mud outlet, it is necessary to adjust the distance between the fixed sealing plate and the front support plate and the front and rear position of the rotating part on the screw shaft. At this time, the back and front movement adjustment and operation are difficult, cumbersome, and have low disassembly and assembly efficiency. It is also difficult to accurately control the size of the mud outlet, which affects the dewatering efficiency and ease of operation. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a back pressure mechanism and a spiral dewatering machine that are easy to install, disassemble and adjust.

[0005] This invention is implemented as follows: A back pressure mechanism that is easy to install, disassemble, and adjust is installed inside the sludge discharge box of a screw dewatering machine, comprising: A rotating component includes: a sleeve and a partially covered scraper, the scraper having a circular hole in the middle, and the front end of the sleeve being fixedly connected to the circular hole; the sleeve is fixed on the central shaft of the spiral dewatering machine. The fixed sealing plate is composed of an upper sealing plate and a lower sealing plate, and each end of the upper sealing plate and the lower sealing plate is provided with a fixing component; A sealing plate positioning block is provided on the left and right side walls of the mud discharge box. The sealing plate positioning block has an elongated hole. The fixing members of the upper sealing plate and the lower sealing plate are respectively fixed to the elongated hole on the sealing plate positioning block through a first fixing element. The fixing plate is sleeved on the sleeve and is located at its front end near the sludge scraper.

[0006] Furthermore, the rotating component is a split-joint structure. The sleeve of the rotating component includes two semi-circular sleeve parts. The two sides of each semi-circular sleeve part extend outward in the horizontal direction to form a fixing plate part. The fixing plate parts of the two semi-circular sleeve parts fit together and are connected to each other. The rotating component is held and fixed on the central axis of the spiral shaft by a second fixing element.

[0007] Furthermore, there are two sealing plate positioning blocks, which are respectively fixed on the inner walls of the left and right sides of the mud discharge box.

[0008] Furthermore, observation windows are provided on both the left and right side walls of the mud discharge box, corresponding to the upper and lower positions of the sealing plate positioning block; a scale is provided on the outer side wall of the middle position of each observation window; the observation windows are used to assist the operator in adjusting the position and locking the back pressure mechanism to accurately determine the gap size of the mud discharge port.

[0009] Furthermore, the outside of the observation window is fixedly sealed with a protective cover to prevent sludge from falling in during equipment operation.

[0010] Furthermore, the sludge scraper has an incomplete covering structure, with its outer edge being larger in the middle and smaller at both ends.

[0011] Furthermore, the upper sealing plate and the lower sealing plate are provided with corresponding grooves at the joint, and the upper sealing plate and the lower sealing plate are joined by a concave-convex interlocking method.

[0012] Furthermore, the spiral dewatering machine has multiple spiral shafts, and the number of rotating components matches the number of spiral shafts; the rotation angles of the rotating components on the same plane are staggered.

[0013] Furthermore, the first fixing element and the second fixing element are bolt and nut assemblies, clamps, or pressure devices.

[0014] A spiral sludge dewatering machine includes a filter chamber, and the sludge discharge box at the tail end of the filter chamber is provided with a back pressure mechanism as described above.

[0015] The advantages of this invention are: 1. Flexible loading, unloading and adjustment: The fixed sealing plate adopts a split structure, and with the long strip hole design on the sealing plate positioning block, it can be quickly disassembled and the front and rear positions can be freely adjusted to adjust the size of the sludge outlet and adapt to different sludge treatment conditions.

[0016] 2. Anti-displacement and balanced force: The sleeve of the rotating component is stably connected to the central shaft of the spiral shaft through interlocking splicing and slot design, which prevents the back pressure mechanism from shifting; the fixed sealing plate forms a seamless whole plate after splicing, preventing mud cake from being squeezed out from the splice seam and maintaining uniform pressure.

[0017] 3. Precise control and convenient maintenance: The left and right side walls of the sludge discharge box are equipped with scale markings and observation windows to achieve precise reading of the sludge discharge gap; the protective cover design not only prevents sludge leakage, but also facilitates observation and operation, improving maintenance efficiency. Attached Figure Description

[0018] The present invention will now be further described with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is an exploded structural diagram of the first embodiment of the back pressure mechanism of the present invention.

[0020] Figure 2 yes Figure 1 A schematic diagram of the assembled structure.

[0021] Figure 3 yes Figure 1 A schematic diagram of the structure after separating the right side panel and the protective cover.

[0022] Figure 4 yes Figure 1 Enlarged schematic diagram of a portion (part A) in the image.

[0023] Figure 5 yes Figure 1 Enlarged schematic diagram of a portion (part B) in the diagram.

[0024] Figure 6 yes Figure 1 A schematic diagram of the structure after the fixed sealing plate is assembled.

[0025] Figure 7 This is a schematic diagram of another splicing scheme for the fixed sealing plate in the first embodiment of the back pressure mechanism of the present invention.

[0026] Figure 8 yes Figure 7 A schematic diagram of the separated structure.

[0027] Figure 9 yes Figure 7 Enlarged schematic diagram of a portion (section C).

[0028] Figure 10 yes Figure 7 Enlarged schematic diagram of a portion (part D).

[0029] Figure 11 This is an exploded structural diagram of the second embodiment of the back pressure mechanism of the present invention.

[0030] Figure 12 yes Figure 11 A schematic diagram of the assembled structure.

[0031] Figure 13 yes Figure 11 A schematic diagram of the structure after separating the right side plate and the left side cover plate.

[0032] Figure label: 1-Rotating component, 11-Sleeve, 12-Scraper, 2-Fixed sealing plate, 21-Upper sealing plate, 22-Lower sealing plate, 23-Fixed component, 24-Positioning hole, 3-Sealing plate positioning block, 31-Elongated hole, 41-Bolt, 42-Nut, 51-Bolt, 52-Nut, 6-Observation window, 7-Scale, 8-Protective cover, 100-Mud discharge box, 101-Side wall, 102-Helical shaft center shaft, 103-Pad plate. Detailed Implementation

[0033] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0034] In the description of the invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention.

[0035] First embodiment: like Figures 1 to 10 As shown, an easily detachable and adjustable back pressure mechanism is installed inside the sludge discharge box 100 of a screw dewatering machine, comprising: The rotating component 1 includes: a sleeve 11 and a partially covered scraper 12, the scraper 12 having a round hole in the middle, and the front end of the sleeve 11 being welded to the round hole; the sleeve 11 is fixed on the central shaft 102 of the spiral dewatering machine. The fixed sealing plate 2 is composed of an upper sealing plate 21 and a lower sealing plate 22. Each of the two ends of the back side of the upper sealing plate 11 and the lower sealing plate 12 is provided with a fixing member 23. The fixing member 23 is provided with a positioning hole 24 (at least one of which is a threaded hole to improve the stability and ease of operation during the assembly process). The sealing plate positioning block 3 is located on the left and right side walls 101 of the mud discharge box 100. The sealing plate positioning block 3 has an elongated hole 31. The fixing parts 23 of the upper sealing plate 21 and the lower sealing plate 22 are located above and below the elongated hole 31, respectively, and are fixed by the first fixing element (bolt 41 and nut 42). The fixed sealing plate 2 is sleeved on the sleeve 11 and is located at its front end and close to the mud scraper 12.

[0036] In this embodiment, the rotating component 1 is a split-joint structure. The sleeve 11 of the rotating component 1 includes two semi-circular sleeve parts. The two sides of each semi-circular sleeve part extend outward in the horizontal direction to form a fixing plate part 111. The fixing plate parts 111 of the two semi-circular sleeve parts fit together and are fixed to the spiral shaft center axis 102 by the second fixing element (bolt 51 and nut 52). The sludge scraper 12 is a partially covered structure. Its outer edge shape can be rhomboid, spindle-shaped, needle-shaped, elliptical, or semi-elliptical, or other shapes that are larger in the middle and smaller at both ends. There are two sealing plate positioning blocks 3. The two sealing plate positioning blocks 3 are respectively fixed on the inner sidewalls 101 on the left and right sides of the mud discharge box. Corresponding grooves are opened at the splicing point of the upper sealing plate 21 and the lower sealing plate 22. The upper sealing plate and the lower sealing plate are spliced ​​by interlocking (or by using) Figure 7 (As shown in the splicing scheme).

[0037] The left and right side walls 101 of the sludge discharge box 100 are each provided with an observation window 6 at the upper and lower positions corresponding to the sealing plate positioning block 3. A scale 7 is installed on the outer side wall of the middle position of each observation window 6. The observation window 6 is used to assist the operator in adjusting the position of the back pressure mechanism and locking it in place. The scale 7 can be used to accurately determine the gap size of the sludge discharge port by observing the bolt 41 on the sealing plate positioning block 3 (with a pointer pressed against the bolt 41). The outer side of the observation window 6 is fixedly sealed by a protective cover 8 to prevent sludge from falling during equipment operation.

[0038] Assembly process: First, assemble the rotating component 1 to initially fix the sleeve 11 while maintaining its ability to move back and forth. Then, install the fixing plate 2 for initial fixation. The specific steps include the following: The two semi-circular sleeve pieces are locked together by bolts 41 and nuts 42, and locked by locking the lock holes to make the sleeve 11 fit tightly with the central shaft 102 of the spiral shaft. The upper sealing plate 21 and the lower sealing plate 22 are fitted onto the sleeve 11 of the rotating component 1 and spliced ​​together to form a fixed sealing plate 2. The fixed sealing plate 2 is inserted into the groove between the fixed plate part 111 and the mud scraper 12. Align the positioning piece 23 with the sealing plate positioning blocks 3 on both sides of the mud discharge box; The bolts 51 are passed through the positioning holes 24 on the upper sealing plate positioning component 23, the elongated holes 31 on the positioning block, and the positioning holes 24 on the lower sealing plate positioning component 23 in sequence to complete the initial fixation; Adjust the relative position of the scraper 12 of the rotating component 1 and the fixed sealing plate 2 to ensure that the mud outlet is not completely covered; Cover the protective cover 8 on the side wall 101 of the mud discharge box to complete the overall assembly.

[0039] Operation when it is necessary to adjust the size of the mud outlet: Loosen the bolts 41 and nut 42 of the rotating component 1, then loosen the bolts 51 and nut 52 of the fixed sealing plate 2, observe the scale 7, push the fixed sealing plate 2 to move back and forth, adjust to the target gap, and then tighten it again. By opening the protective cover 8, the sludge discharge can be observed, and the rotating component 1 can be maintained or replaced if necessary.

[0040] Work process: The sludge is pushed to the sludge outlet by the screw shaft. The rotating component 1 rotates with the screw shaft, and the incomplete sealing plate scraper 12 dynamically scrapes off the attached sludge, while sharing the back pressure to prevent blockage. The fixed sealing plate 2 provides stable back pressure, and the moisture content of the mud cake is controlled by adjusting the gap to ensure the dewatering effect; Rotating component 1 is stably connected to the screw shaft to prevent the back pressure mechanism from shifting and ensure long-term stable operation.

[0041] Second embodiment: like Figures 11 to 13 As shown, the difference between this embodiment and the first embodiment is that the spiral dewatering machine is a dual-shaft type, so the number of rotating components 1 of the back pressure mechanism is also two (matching the number of spiral shafts); the rotation angles of the scraper parts 12 in the two rotating components 1 on the same plane are staggered.

[0042] The present invention also provides a spiral sludge dewatering machine, including a filter chamber, wherein the sludge discharge box at the tail end of the filter chamber is provided with the back pressure mechanism described in the first embodiment or the second embodiment.

[0043] The above embodiments and figures are not intended to limit the product form and style of the present invention. Any appropriate changes or modifications made by those skilled in the art should be considered as not departing from the patent scope of the present invention.

Claims

1. A back pressure mechanism that is easy to install, disassemble, and adjust, located inside the sludge discharge box of a screw dewatering machine, characterized in that: include: A rotating component includes: a sleeve and a partially covered scraper, the scraper having a circular hole in the middle, and the front end of the sleeve being fixedly connected to the circular hole; the sleeve is fixed on the central shaft of the spiral dewatering machine. The fixed sealing plate is composed of an upper sealing plate and a lower sealing plate, and each end of the upper sealing plate and the lower sealing plate is provided with a fixing component; A sealing plate positioning block is provided on the left and right side walls of the mud discharge box. The sealing plate positioning block has an elongated hole. The fixing members of the upper sealing plate and the lower sealing plate are respectively fixed to the elongated hole on the sealing plate positioning block through a first fixing element. The fixing plate is sleeved on the sleeve and is located at its front end near the sludge scraper.

2. The back pressure mechanism as described in claim 1, characterized in that: The rotating component is a split-joint structure. The sleeve of the rotating component includes two semi-circular sleeve parts. The two sides of each semi-circular sleeve part extend outward in the horizontal direction to form a fixing plate part. The fixing plates of the two semi-circular sleeve parts fit together and are connected to each other. The rotating component is held and fixed on the central axis of the spiral shaft by a second fixing element.

3. The back pressure mechanism as described in claim 1, characterized in that: The number of sealing plate positioning blocks is two, and the two sealing plate positioning blocks are respectively fixed on the inner walls of the left and right sides of the mud discharge box.

4. The back pressure mechanism as described in claim 1, characterized in that: The left and right side walls of the mud discharge box are provided with observation windows corresponding to the upper and lower positions of the sealing plate positioning block; a scale is provided on the outer side wall of the middle position of the observation window; the observation window is used to assist the operator in adjusting the position of the back pressure mechanism and locking it to accurately determine the gap size of the mud discharge port.

5. The back pressure mechanism as described in claim 4, characterized in that: The outside of the observation window is fixedly sealed with a protective cover to prevent sludge from falling in during equipment operation.

6. The back pressure mechanism as described in claim 1, characterized in that: The scraper has an incomplete covering structure, and its outer edge is larger in the middle and smaller at both ends.

7. The back pressure mechanism as described in claim 1, characterized in that: The upper sealing plate and the lower sealing plate are provided with corresponding grooves at the joint, and the upper sealing plate and the lower sealing plate are joined by interlocking concave and convex joints.

8. The back pressure mechanism as described in claim 1, characterized in that: The spiral dewatering machine has multiple spiral shafts, and the number of rotating components matches the number of spiral shafts; the rotation angles of the rotating components on the same plane are staggered.

9. The back pressure mechanism as described in claim 1, characterized in that: The first fixing element and the second fixing element are bolt and nut assemblies, clamps or tighteners.

10. A spiral sludge dewatering machine, characterized in that: It includes a filter chamber, and the mud discharge box at the tail end of the filter chamber is provided with a back pressure mechanism as described in any one of claims 1 to 9.

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