Unloading device for pentaerythritol belt filter

Abstract

The utility model discloses a kind of pentaerythritol belt filter unloading device, including support shaft and drum, the both ends of support shaft are respectively provided with journal, drum is rotatably sleeved on support shaft, a plurality of through holes are provided on circumferential wall on drum, the journal of one end or both ends is provided with air inlet hole, and air inlet hole extends to support shaft inside, gas guide groove is axially provided on the outer circumferential wall of support shaft, gas guide groove is located inside drum, and gas guide groove is communicated with air inlet hole. By being provided with air inlet hole in support shaft, and being axially provided with gas guide groove on the outer circumferential wall of support shaft, gas guide groove is communicated with air inlet hole, drum is rotatably sleeved on support shaft, a plurality of through holes are provided along circumferential wall on drum, pressure air is input into gas guide groove by air inlet hole, pressure air is provided to the multiple through holes on drum by gas guide groove, so as to impact filter cloth around the outer wall of drum, to peel off residual filter cake.

Description

Technical Field

[0001] This utility model relates to the field of belt filter technology, and in particular to a pentaerythritol belt filter unloading device. Background Technology

[0002] Currently, the solid-liquid separation of pentaerythritol is mainly achieved using moving disc filters or vacuum belt filters. Due to the structural characteristics of these devices, the unloading method involves a fixed scraper scraping the filter cake off the circularly rotating filter cloth. Under normal operating conditions, the filter cake thickness is 12-20mm. The scraper can remove most of the filter cake, but a small amount of residual filter cake remains between the scraper and the filter cloth. Ultimately, the pentaerythritol particles remaining on the filter cloth adhere to the redirecting rollers of the equipment as the filter cloth rotates, and also drip into the containment dam. This not only results in incomplete product recovery and hidden economic losses, but also causes a poor production environment and increased cleaning pressure on the process water circulation system due to the residual particles dripping into the containment dam. In addition, the residual particles adhering to the running rollers cause the cylindrical rollers to become elliptical, leading to dynamic imbalance of the equipment. Therefore, we propose a pentaerythritol belt filter unloading device in this application. Utility Model Content

[0003] The technical problem to be solved by this utility model is to address the problems existing in the background art and provide a pentaerythritol belt filter unloading device. This device has an air inlet hole in the support shaft and an axial air guide groove on the outer circumferential wall of the support shaft. The air guide groove is connected to the air inlet hole. A roller is rotated and mounted on the support shaft. Multiple through holes are provided on the circumferential wall of the roller. Pressurized air is input into the air guide groove through the air inlet hole and supplied to the multiple through holes on the roller through the air guide groove, thereby impacting the filter cloth surrounding the outer wall of the roller to remove residual filter cake. To achieve the above-mentioned technical features, the purpose of this utility model is as follows: A pentaerythritol belt filter unloading device includes a support shaft and a drum. The two ends of the support shaft are respectively provided with journals. The drum is rotatably mounted on the support shaft. Multiple through holes are provided along the circumferential wall of the drum. An air inlet is provided at one or both ends of the journal, and the air inlet extends into the inside of the support shaft. An air guide groove is axially provided on the outer circumferential wall of the support shaft. The air guide groove is located inside the drum and communicates with the air inlet.

[0004] Bearings are installed at both ends of the support shaft, and the two ends of the roller are installed on the bearings at both ends of the support shaft.

[0005] A movable block is also slidably installed inside the air guide groove. The top surface of the movable block is an arc-shaped surface that fits the inner wall of the roller. The bottom surface of the movable block is inserted into the air guide groove. The movable block is provided with an elongated hole that penetrates the top and bottom surfaces.

[0006] The air guide groove has steps at both ends, the movable block is located on the upper side of the steps, and springs are installed on the steps on both sides, with the springs abutting against the bottom surface of the movable block.

[0007] The bottom surface of the movable block is provided with blind holes at both ends, and the spring abuts against one end of the movable block and extends into the blind hole.

[0008] The movable block has a sealing groove on its periphery, and a sealing strip is installed in the sealing groove.

[0009] The support shaft is fitted with end caps at both ends, and the end caps are fixed to the roller. The end caps have flanges on the side facing the bearing, and the flanges abut against the bearing.

[0010] The outer wall of the roller is provided with multiple axial connecting grooves, which connect multiple through holes.

[0011] The total length L1 of the axial through hole of the roller is not greater than the total length of the elongated hole.

[0012] An air pipe connection structure is provided at the end of the journal with an air inlet; the air pipe connection structure includes multiple threaded holes provided on the end face of the journal, or internal threads provided in the air inlet.

[0013] The features of this utility model using the above-mentioned technical solution are: 1. This utility model has an air inlet hole in the support shaft and an air guide groove axially arranged on the outer circumferential wall of the support shaft. The air guide groove is connected to the air inlet hole. The roller is rotated and mounted on the support shaft. Multiple through holes are arranged on the circumferential wall of the roller. Pressurized air is input into the air guide groove through the air inlet hole and pressurized air is provided to the multiple through holes on the roller through the air guide groove, thereby impacting the filter cloth surrounding the outer wall of the roller to peel off the residual filter cake.

[0014] 2. The air guide groove of this utility model is also slidably installed with a movable block. The movable block slides in the air guide groove and abuts against the inner wall of the drum, reducing the leakage of compressed air. When the drum is driven to rotate by the filter cloth, the elongated hole can always keep the corresponding through hole open, thereby impacting the filter cloth surrounding the outer wall of the drum with compressed air to peel off the residual filter cake on the filter cloth.

[0015] 3. The outer wall of the roller of this utility model is provided with multiple axial connecting grooves, which connect multiple through holes, further increasing the ventilation area of ​​the outer wall of the roller. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0017] Figure 1This is a schematic diagram of the axial cross-sectional structure of this utility model.

[0018] Figure 2 This is a side view of the structure of this utility model.

[0019] Figure 3 for Figure 1 A schematic diagram of the structure of section AA in the middle.

[0020] Figure 4 for Figure 1 A schematic diagram of the structure of the BB cross section.

[0021] Figure 5 This is a schematic diagram of the three-dimensional structure of the movable block in this utility model.

[0022] Figure 6 for Figure 5 A schematic diagram of the structure of the CC section.

[0023] Figure 7 This is a three-dimensional structural diagram of the roller in this utility model.

[0024] Figure Labels Support shaft 10, journal 11, bearing 12, air inlet 13, air guide groove 14, step 15, spring 16, air pipe connection structure 17; Roller 20, through hole 21, connecting groove 22; 30. Movable block; 31. Long hole; 32. Sealing groove; 33. Sealing strip; 34. Top surface; 35. Blind hole; End cap 40, flange 41. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] It should be noted that the use of terms such as "an embodiment," "an embodiment," "an exemplary embodiment," and "some embodiments" in the specification indicates that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments (whether explicitly described or not) should be within the knowledge of those skilled in the art.

[0027] Example 1: See Figure 1A pentaerythritol belt filter unloading device includes a support shaft 10 and a drum 20. The two ends of the support shaft 10 are respectively provided with journals 11. The drum 20 is rotatably mounted on the support shaft 10. Multiple through holes 21 are provided along the circumferential wall of the drum 20. One or both ends of the journal 11 are provided with air inlets 13, and the air inlets 13 extend into the interior of the support shaft 10. An air guide groove 14 is axially provided on the outer circumferential wall of the support shaft 10. The air guide groove 14 is located inside the drum 20 and communicates with the air inlets 13.

[0028] An air inlet 13 is provided inside the support shaft 10, and an air guide groove 14 is axially provided on the outer circumferential wall of the support shaft 10. The air guide groove 14 is connected to the air inlet 13. The drum 20 is rotatably mounted on the support shaft 10. Multiple through holes 21 are provided on the drum 20 along the circumferential wall. Pressurized air is input into the air guide groove 14 through the air inlet 13. Pressurized air is provided to the multiple through holes 21 on the drum 20 through the air guide groove 14, thereby impacting the filter cloth surrounding the outer wall of the drum 20 to remove residual filter cake.

[0029] In this embodiment, the fitting precision between the roller 20 and the support shaft 10 is high, so that the roller 20 can rotate on the support shaft 10 and has a small gap, reducing the leakage of compressed air from the roller 20 and the support shaft 10 in the air guide groove 14, and allowing the compressed air to be blown out from the through hole 21 opposite to the air guide groove 14 as much as possible.

[0030] During installation, fixed seats are installed on the journals 11 at both ends, and the fixed seats are connected to the frame. The unloading device of this application serves as the driven roller, and the filter cloth is partially surrounded on the roller 20. The air guide groove 14 extends laterally toward the filter cloth.

[0031] Furthermore, bearings 12 are installed at both ends of the support shaft 10, and the two ends of the roller 20 are installed on the bearings 12 at both ends of the support shaft 10.

[0032] In this embodiment, the bearing 12 is a self-lubricating bearing, and the outer diameter of the self-lubricating bearing is within 0.5 mm larger than the outer diameter of the support shaft 10.

[0033] Example 2: In this embodiment, bearing 12 can be a rolling bearing, such as a ball roller bearing or a cylindrical roller bearing. Using a rolling bearing will result in a larger gap between the support shaft 10 and the inner wall of the roller 20.

[0034] Therefore, see Figure 1 , 3 4. A movable block 30 is also slidably installed in the air guide groove 14. The movable block 30 slides in the air guide groove 14, so that the movable block 30 abuts against the inner wall of the roller 20, thereby reducing the leakage of compressed air.

[0035] Specifically, see Figure 5 , 6 The top surface 34 of the movable block 30 is an arc-shaped surface that fits the inner wall of the roller 20. The bottom surface of the movable block 30 is inserted into the air guide groove 14. The movable block 30 is provided with an elongated hole 31 that penetrates the top surface 34 and the bottom surface.

[0036] When in use, compressed air is introduced into the air inlet 13, and the air pressure in the air guide groove 14 increases. The air pressure in the air guide groove 14 pushes the movable block 30 outward, so that the movable block 30 abuts against the inner wall of the roller 20.

[0037] To improve the sealing between the movable block 30 and the air guide groove 14, see Figure 4 A sealing groove 32 is provided on the periphery of the movable block 30, and a sealing strip 33 is installed in the sealing groove 32.

[0038] See Figure 7 The outer wall of the roller 20 is provided with multiple axial connecting grooves 22, which connect multiple through holes 21, further increasing the ventilation area of ​​the outer wall of the roller 20.

[0039] Further details, see [link / reference] Figure 7 , and then combine Figure 1 The total length L1 of the axial through hole 21 of the roller 20 is not greater than the total length of the elongated hole 31. When the filter cloth is installed, the width of the filter cloth is greater than the total length L1 of the axial through hole 21 of the roller 20, so as to cover all the through holes 21 through which compressed air is introduced.

[0040] Example 3: Based on Example 2, see Figure 1 , 3 The air guide groove 14 has steps 15 at both ends, and the movable block 30 is located on the upper side of the steps 15. Springs 16 are installed on the steps 15 on both sides, and the springs 16 abut against the bottom surface of the movable block 30. By elastically abutting against the movable block 30 by the springs 16, the movable block 30 can also abut against the inner wall of the roller 20 when the air pressure decreases.

[0041] Furthermore, blind holes 35 are provided at both ends of the bottom surface of the movable block 30. The spring 16 abuts against one end of the movable block 30 and extends into the blind hole 35 to limit the spring 16 and prevent the spring 16 from displacing and falling out of the preset position.

[0042] Example 4: Based on Example 1, 2, or 3, see [link to example]. Figure 1 End caps 40 are fitted onto both ends of the support shaft 10. The end caps 40 are fixedly installed on the roller 20. A flange 41 is provided on the side of the end cap 40 facing the bearing 12. The flange 41 abuts against the bearing 12, thereby limiting the bearing 12. When the bearing 12 is a rolling bearing, the flange 41 abuts against the outer ring of the bearing 12.

[0043] See Figure 1 An air pipe connection structure 17 is provided at the end of the journal 11, which is provided with an air inlet 13, so as to connect with the compressed air supply pipe.

[0044] In this embodiment, the air pipe connection structure 17 includes multiple threaded holes provided on the end face of the journal 11. During installation, a flange is welded to the end of the compressed air supply pipe. The flange is screwed and fixed to the threaded holes on the end face of the journal 11 by bolts. The flange and the end face of the journal 11 are sealed by a sealing gasket.

[0045] Alternatively, an internal thread can be installed in the air inlet 13. During installation, the end of the compressed air supply pipe is provided with an external thread, and the end of the compressed air supply pipe is screwed and fixed to the air inlet 13.

[0046] The working principle or process of the utility model: See Figure 1 During installation, fixed seats are installed on the journals 11 at both ends, and the fixed seats are connected to the frame. The unloading device of this application serves as the driven roller, and the filter cloth is partially surrounded on the roller 20. The air guide groove 14 extends laterally toward the filter cloth.

[0047] In use, the compressed air supply pipe is installed and fixed to the end face of the journal 11 via the air pipe connection structure 17. The movable block 30 abuts against the inner wall of the roller 20 via the spring 16. Compressed air is input into the air guide groove 14 through the air inlet 13, and then blown out from the elongated hole 31 of the movable block 30.

[0048] Since the top surface 34 of the movable block 30 abuts against the inner wall of the drum 20, when the drum 20 is driven to rotate by the filter cloth, the elongated hole 31 can always conduct the corresponding through hole 21, thereby impacting the filter cloth surrounding the outer wall of the drum 20 with compressed air to peel off the residual filter cake on the filter cloth.

[0049] While specific embodiments of the present invention have been described above, those skilled in the art should understand that the specific embodiments described are merely illustrative and not intended to limit the scope of the present invention. Any modifications and variations made by those skilled in the art in accordance with the spirit of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A discharge device for a pentaerythritol belt filter, characterized in that: The device includes a support shaft (10) and a roller (20). The support shaft (10) has journals (11) at both ends. The roller (20) is rotatably mounted on the support shaft (10). The roller (20) has multiple through holes (21) along its circumferential wall. One or both journals (11) have air inlets (13) that extend into the support shaft (10). The outer circumferential wall of the support shaft (10) has an axially arranged air guide groove (14) that is located inside the roller (20) and is connected to the air inlet (13).

2. The pentaerythritol belt filter unloading device according to claim 1, characterized in that: The two ends of the support shaft (10) are respectively equipped with bearings (12), and the two ends of the roller (20) are respectively installed on the bearings (12) at both ends of the support shaft (10).

3. A pentaerythritol belt filter unloading device according to claim 1 or 2, characterized in that: A movable block (30) is also slidably installed inside the air guide groove (14). The top surface (34) of the movable block (30) is an arc-shaped surface that is adapted to the inner wall of the roller (20). The bottom surface of the movable block (30) is inserted into the air guide groove (14). The movable block (30) is provided with an elongated hole (31) that penetrates the top surface (34) and the bottom surface.

4. The pentaerythritol belt filter unloading device according to claim 3, characterized in that: The air guide groove (14) has steps (15) at both ends. The movable block (30) is located on the upper side of the step (15). Springs (16) are installed on the steps (15) on both sides. The springs (16) abut against the bottom surface of the movable block (30).

5. The pentaerythritol belt filter unloading device according to claim 4, characterized in that: The bottom surface of the movable block (30) is provided with blind holes (35) at both ends, and the spring (16) abuts against one end of the movable block (30) and extends into the blind hole (35).

6. The pentaerythritol belt filter unloading device according to claim 3, characterized in that: A sealing groove (32) is provided on the periphery of the movable block (30), and a sealing strip (33) is installed in the sealing groove (32).

7. The pentaerythritol belt filter unloading device according to claim 2, characterized in that: The support shaft (10) is fitted with end caps (40) at both ends. The end caps (40) are fixed to the roller (20). The end caps (40) have a flange (41) on the side facing the bearing (12). The flange (41) abuts against the bearing (12).

8. A pentaerythritol belt filter unloading device according to claim 1 or 3, characterized in that: The outer wall of the roller (20) is provided with a plurality of axial connecting grooves (22), which connect a plurality of through holes (21).

9. The pentaerythritol belt filter unloading device according to claim 3, characterized in that: The total length L1 of the axial through hole (21) of the roller (20) is not greater than the total length of the elongated hole (31).

10. The pentaerythritol belt filter unloading device according to claim 1, characterized in that: An air pipe connection structure (17) is provided at the end of the journal (11) which is provided with an air inlet (13); the air pipe connection structure (17) includes multiple threaded holes provided on the end face of the journal (11), or internal threads provided in the air inlet (13).

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