High-density polyethylene conveying equipment

Abstract

The utility model discloses high-density polyethylene conveying equipment which comprises a feeding box and a chain driving box, a feeding pipe and a returning pipe are connected between the feeding box and the chain driving box, and a chain of an annular structure is arranged in the feeding box, the feeding pipe, the chain driving box and the returning pipe in a penetrating mode. A plurality of chain plates arranged at intervals are mounted on the chain, a plurality of rollers distributed circumferentially are arranged on the rear surfaces of the chain plates in the moving direction, and the rollers are connected with the chain plates through wheel seats; a material vibrating box communicated with an inner cavity of the material returning pipe is arranged above the end, close to the feeding box, of the material returning pipe, the bottom of the material vibrating box is communicated with the inner cavity of the material returning pipe, and a material vibrating rod and a compression spring are arranged in the middle of the inner cavity of the material vibrating box; the main body of the feeding pipe and the main body of the returning pipe are each provided with a tensioning joint, each tensioning joint comprises a corrugated pipe, and telescopic rods and hydraulic cylinders are arranged on the two sides of each corrugated pipe. The automatic tensioning device can solve the problems that a chain disc is prone to abrasion, and the conveying efficiency is reduced due to residual powder, and can achieve automatic tensioning of a chain in a pipe.

Description

Technical Field

[0001] The utility model relates to high-density polyethylene conveying equipment, belonging to the technical field of chlorinated polyethylene production equipment. Background Art

[0002] High-density polyethylene is one of the raw materials for chlorinated polyethylene products. In the production process of chlorinated polyethylene, according to the new regulatory requirements for full-process automation and continuity, the feeding method has gradually changed from directly feeding into the chlorination kettle to first mixing and then conveying the slurry to the reactor. At the same time, due to the large-scale equipment and feeding efficiency requirements, most of the feeding is done by air delivery. Because high-density polyethylene is a Class C combustible substance, in extreme cases, polyethylene has an explosion limit and there is a risk of dust explosion. Therefore, many manufacturers consider using nitrogen airflow for transportation, which increases costs greatly. If nitrogen is not used, there is a risk of explosion. In response to this problem, pipe chain conveying equipment came into being. Pipe chain conveying equipment overcomes the shortcomings of airflow transportation and greatly increases the safety of polyethylene transportation.

[0003] At present, there are still the following deficiencies in the transportation of high-density polyethylene powder through pipe chains:

[0004] 1. When the chain plate is in sliding contact with the inner wall of the conveying pipe for a long time, the outer periphery of the chain plate will be worn, and the gap between the outer periphery of the chain plate and the inner wall of the conveying pipe will become larger and larger, affecting the conveying effect;

[0005] 2. Powder will remain on the surface of the chain disc or in the gap between the chain disc and the chain. The residual accumulation of powder will reduce the conveying efficiency;

[0006] 3. The conveying pipes are equipped with a tensioning device to achieve the tensioning of the chain inside the pipe. However, the existing tensioning devices are all manually adjusted, which is relatively cumbersome.

[0007] In summary, the prior art obviously has inconveniences and defects in practical use, so it is necessary to improve it. Utility Model Content

[0008] The utility model aims at the deficiencies in the background technology and provides a high-density polyethylene conveying device, which can solve the problem of easy wear of the chain plate and the problem of reduced conveying efficiency due to residual powder, and can realize automatic tensioning of the chain in the pipe.

[0009] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0010] A high-density polyethylene conveying device comprises a feed box and a chain drive box, a feed pipe and a return pipe are connected between the feed box and the chain drive box, and a chain with an annular structure is passed through the feed box, the feed pipe, the chain drive box and the return pipe; a plurality of chain discs arranged at intervals are installed on the chain, a plurality of rollers distributed in a circumference are arranged on the rear surface of the chain disc along the moving direction, and the rollers are connected to the chain disc through a wheel seat;

[0011] A material shock box connected to the inner cavity of the return pipe is arranged above the end of the return pipe close to the feed box, the bottom of the material shock box is connected to the inner cavity of the return pipe, and a material shock rod and a compression spring are arranged in the middle of the inner cavity of the material shock box;

[0012] A set of tensioning joints are installed on the main bodies of the feeding pipe and the returning pipe. The tensioning joints include bellows. Telescopic rods and hydraulic cylinders are arranged on both sides of the bellows.

[0013] Furthermore, the chain plate is a split structure, and there is a gap of 3-5 mm between the chain plate and the feeding pipe and the return pipe.

[0014] Furthermore, the outer peripheral surface of the roller is in contact with the inner walls of the feeding tube and the returning tube.

[0015] Furthermore, the top end of the material-shaking rod is hinged on the top wall of the inner cavity of the material-shaking box.

[0016] Furthermore, one end of the compression spring is fixedly connected to the material-vibrating rod, and the other end is fixedly mounted on the inner cavity side wall of the material-vibrating box.

[0017] Furthermore, the axis of the bellows is arranged in the vertical direction, and flanges for connecting with the feeding pipe or the returning pipe are respectively provided at both ends of the bellows.

[0018] Furthermore, the head and tail of the hydraulic cylinder are respectively connected to two flanges, and both ends of the telescopic rod are respectively fixedly connected to the flanges.

[0019] Furthermore, the hydraulic cylinders of the two sets of tensioning joints are connected to the hydraulic station.

[0020] Furthermore, the height of the chain drive box is greater than the height of the feed box; a feed port is provided at the top of the feed box, and a discharge port is provided at the bottom of the chain drive box.

[0021] Compared with the prior art, the utility model has the following advantages after adopting the above technical solution:

[0022] By arranging rollers on the rear surface of the chain disk along the moving direction, the wear caused by sliding contact between the outer periphery of the chain disk and the feeding pipe and the return pipe can be reduced, which can not only extend the service life of the chain disk, but also ensure the constant conveying effect;

[0023] By setting the material shaking component, the residual materials on the surface or in the gap of the chain disc can be shaken off, so that the chain disc can be kept clean and the conveying efficiency can be ensured;

[0024] The two groups of tensioning joints in the utility model are synchronously driven by the hydraulic station, so that synchronous tensioning adjustment is realized and the adjustment process is convenient.

[0025] The utility model is described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the utility model;

[0027] Figure 2 yes Figure 1 The structural cross-sectional view at M in the middle;

[0028] Figure 3 yes Figure 1 Enlarged view of the structure at position N.

[0029] In the figure, 1-feed box, 2-feed port, 3-chain drive box, 4-discharge port, 5-feeding pipe, 6-return pipe, 7-chain plate, 8-roller, 9-wheel seat, 10-vibration box, 11-vibration rod, 12-compression spring, 13-tensioning joint, 131-bellows, 132-flange, 133-telescopic rod, 134-hydraulic cylinder, 14-hydraulic station. DETAILED DESCRIPTION

[0030] In order to have a clearer understanding of the technical features, purposes and effects of the utility model, the specific implementation methods of the utility model are now described with reference to the accompanying drawings.

[0031] like Figure 1-Figure 3 As shown together, the utility model provides a high-density polyethylene conveying equipment, including a feed box 1 and a chain drive box 3. The height of the chain drive box 3 is greater than the height of the feed box 1. A feeding pipe 5 and a return pipe 6 are connected between the feed box 1 and the chain drive box 3. A chain with a ring structure is inserted through the feed box 1, the feeding pipe 5, the chain drive box 3 and the return pipe 6.

[0032] A feed port 2 is provided on the top of the feed box 1 , and a discharge port 4 is provided on the bottom of the chain drive box 3 .

[0033] The chain is provided with a plurality of chain plates 7 arranged at intervals. The chain plates 7 are split structures. There is a gap of 3-5 mm between the chain plates 7 and the feeding pipe 5 and the return pipe 6. A plurality of rollers 8 distributed in a circumference are provided on the rear surface of the chain plates 7 along the movement direction. The rollers 8 are connected to the chain plates 7 through wheel seats 9.

[0034] The outer peripheral surface of the roller 8 contacts the inner wall of the feeding pipe 5 and the return pipe 6. By arranging the roller 8 to reduce the wear caused by sliding contact between the outer periphery of the chain plate 7 and the feeding pipe 5 and the return pipe 6, not only the service life of the chain plate 7 can be extended, but also the constant conveying effect can be ensured.

[0035] A shock box 10 connected to the inner cavity of the return tube 6 is provided above the end thereof close to the feed box 1 , and the bottom of the shock box 10 is connected to the inner cavity of the return tube 6 . A shock rod 11 and a compression spring 12 are provided in the middle of the inner cavity of the shock box 10 .

[0036] The top end of the shock rod 11 is hinged on the top wall of the inner cavity of the shock box 10, and the shock rod 11 can swing along the hinge; one end of the compression spring 12 is fixedly connected to the shock rod 11, and the other end is fixedly installed on the inner cavity side wall of the shock box 10.

[0037] When the chain plate 7 moves along with the chain, the chain plate 7 contacts the material-vibrating rod 11 and makes it swing upward. When the chain plate 7 loses contact with the material-vibrating rod 11, the material-vibrating rod 11 quickly resets under the action of the restoring force of the compression spring 12, and hits the chain plate 7 behind during the reset process, thereby shaking off the material remaining on the surface of the chain plate 7 or in the gap, so that the chain plate 7 remains clean and the conveying efficiency is ensured.

[0038] A set of tension joints 13 are installed on the main bodies of the feeding pipe 5 and the return pipe 6 .

[0039] The tensioning joint 13 comprises a bellows 131 , the axis of which is arranged in the vertical direction, and flanges 132 for connecting with the feeding pipe 5 or the return pipe 6 are respectively arranged at both ends of the bellows 131 .

[0040] A telescopic rod 133 and a hydraulic cylinder 134 are provided between the flanges 132 at both ends of the bellows 131 . The telescopic rod 133 and the hydraulic cylinder 134 are distributed on both sides of the bellows 131 .

[0041] The head and tail of the hydraulic cylinder 134 are respectively connected to the two flanges 132 , and both ends of the telescopic rod 133 are respectively fixedly connected to the flanges 132 . The telescopic rod 133 plays a guiding function to ensure the stability and straightness of the bellows 131 during the telescopic process.

[0042] The hydraulic cylinders 134 of the two sets of tensioning joints 13 are both connected to the hydraulic station 14, and the hydraulic station 14 synchronously drives the two hydraulic cylinders 134 to extend and retract, thereby realizing synchronous tensioning adjustment.

[0043] The specific working principle of this utility model:

[0044] The chain drives the chain plate 7 to rotate inside the feeding pipe 5 and the return pipe 6, and the high-density polyethylene powder is put into the feeding port 2, and the polyethylene powder is pushed by the chain plate 7 and discharged after reaching the discharging port 4. In this reciprocating cycle, the high-density polyethylene powder at the feeding port 2 is continuously pushed to the discharging port 4 by the chain plate 7, thereby achieving the purpose of lifting and conveying the high-density polyethylene powder.

[0045] By arranging a roller 8 on the rear surface of the chain plate 7 along the moving direction, the wear caused by sliding contact between the outer periphery of the chain plate 7 and the feeding pipe 5 and the return pipe 6 can be reduced, which can not only extend the service life of the chain plate 7 but also ensure the constant conveying effect.

[0046] By providing the material-shaking component, the material remaining on the surface or in the gap of the chain disc 7 can be shaken off, so that the chain disc 7 is kept clean and the conveying efficiency is ensured.

[0047] The two groups of tensioning joints 13 in the utility model are synchronously driven by the hydraulic station 14, so that synchronous tensioning adjustment is realized, and the adjustment process is convenient.

[0048] The utility model has a closed conveying process, does not generate dust, does not form explosive dust, greatly improves safety, does not require a large dust collector, and saves investment significantly.

[0049] The above is an example of the best implementation of the utility model, and the parts not described in detail are common knowledge of ordinary technicians in this field. The protection scope of the utility model is based on the content of the claims, and any equivalent transformation based on the technical inspiration of the utility model is also within the protection scope of the utility model.

Claims

1. A high-density polyethylene conveying device, comprising a feed box (1) and a chain drive box (3), wherein a feed pipe (5) and a return pipe (6) are connected between the feed box (1) and the chain drive box (3), and a chain with an annular structure is inserted through the feed box (1), the feed pipe (5), the chain drive box (3) and the return pipe (6), and characterized in that: The chain is provided with a plurality of chain plates (7) arranged at intervals, a plurality of rollers (8) distributed in a circumference are provided on the rear surface of the chain plates (7) along the direction of movement, and the rollers (8) are connected to the chain plates (7) via wheel seats (9); A material shock box (10) is provided above the end of the return pipe (6) close to the feed box (1) and is connected to the inner cavity of the return pipe (6). The bottom of the material shock box (10) is connected to the inner cavity of the return pipe (6). A material shock rod (11) and a compression spring (12) are provided in the middle of the inner cavity of the material shock box (10). A set of tensioning joints (13) are installed on the main bodies of the feeding pipe (5) and the returning pipe (6). The tensioning joints (13) include a bellows (131). Telescopic rods (133) and hydraulic cylinders (134) are provided on both sides of the bellows (131).

2. The high-density polyethylene conveying equipment according to claim 1, characterized in that: The chain plate (7) is a split structure, and there is a gap of 3-5 mm between the chain plate (7) and the feeding pipe (5) and the return pipe (6).

3. The high-density polyethylene conveying equipment according to claim 1, characterized in that: The outer peripheral surface of the roller (8) is in contact with the inner walls of the feeding tube (5) and the returning tube (6).

4. The high-density polyethylene conveying equipment according to claim 1, characterized in that: The top end of the material-vibrating rod (11) is hingedly connected to the top wall of the inner cavity of the material-vibrating box (10).

5. The high-density polyethylene conveying equipment according to claim 4, characterized in that: One end of the compression spring (12) is fixedly connected to the material-vibrating rod (11), and the other end is fixedly mounted on the inner cavity side wall of the material-vibrating box (10).

6. The high-density polyethylene conveying equipment according to claim 1, characterized in that: The axis of the bellows (131) is arranged in the vertical direction, and flanges (132) for connecting to the feeding pipe (5) or the returning pipe (6) are respectively provided at both ends of the bellows (131).

7. The high-density polyethylene conveying device according to claim 6, characterized in that: The head and tail of the hydraulic cylinder (134) are respectively connected to the two flanges (132), and the two ends of the telescopic rod (133) are respectively fixedly connected to the flanges (132).

8. The high-density polyethylene conveying equipment according to claim 1, characterized in that: The hydraulic cylinders (134) of the two sets of tensioning joints (13) are both connected to the hydraulic station (14).

9. The high-density polyethylene conveying equipment according to claim 1, characterized in that: The height of the chain drive box (3) is greater than the height of the feed box (1); a feed inlet (2) is provided at the top of the feed box (1), and a discharge outlet (4) is provided at the bottom of the chain drive box (3).

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