Melt blending device for production raw materials of crosslinked polyethylene cable

Abstract

The utility model relates to the technical field of cable material production, in particular to a crosslinked polyethylene cable production raw material melt blending device which comprises a main machine and a mixing device, the mixing device comprises an internal mixing chamber formed by three heating plates, and the three heating plates are respectively a middle heating plate, a left heating plate and a right heating plate. The right heating plate is connected with a shaft sleeve which is driven by a driving motor arranged on the main machine to rotate, a rotor which is detachably connected with the shaft sleeve is arranged in the internal mixing chamber, the mixing device further comprises sliding rods and a cleaning brush, the three heating plates are movably connected together in a penetrating manner through the two parallel sliding rods, and the cleaning brush is detachably connected with the shaft sleeve. The cleaning brush is connected with the original driving motor of the mixer, so that the internal mixing chamber can be electrically cleaned, the labor intensity of cleaning is effectively reduced, the cleaning efficiency is improved, the heating plate does not need to be completely taken down, the trouble of frequently assembling and disassembling the heating plate can be avoided, and the maintenance convenience of equipment is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cable material production, in particular to a device for melting and blending raw materials for cross-linked polyethylene cable production. Background Art

[0002] In the production process of cross-linked polyethylene cable materials, melt blending of raw materials is a key step, which usually requires the use of a torque rheometer. Existing torque rheometers generally consist of two parts: a main unit and a mixer. In order to facilitate cleaning, the mixing chamber of a common mixer is usually composed of three superimposed heating plates, and the rotor used to stir the mixed materials in the mixing chamber is usually detachable. When cleaning is required, the operator needs to separate the three heating plates one by one and remove the rotor to expose the inside of the sealed chamber for cleaning.

[0003] However, the existing cleaning methods have many inconveniences. Usually, the cleaning work requires manual hand-held brushes to clean the remaining materials in the mixing chamber, and the heating plate often needs to be completely removed for thorough cleaning. This method is not only time-consuming and labor-intensive, but may also result in incomplete cleaning, affecting the quality and efficiency of subsequent production. To this end, the utility model provides a cross-linked polyethylene cable production raw material melt blending device that is easy to clean. Utility Model Content

[0004] The utility model aims to provide a device for melting and blending raw materials for producing cross-linked polyethylene cables, which is used to solve the problems raised in the above-mentioned background technology.

[0005] The utility model is realized by the following technical solutions:

[0006] A device for melt blending raw materials for cross-linked polyethylene cable production comprises a main machine and a mixer, wherein the mixer comprises a mixing chamber composed of three heating plates, wherein the three heating plates are a middle heating plate, a left heating plate and a right heating plate, wherein the right heating plate is connected to a shaft sleeve which is driven to rotate by a driving motor installed on the main machine, wherein a rotor which is detachably connected to the shaft sleeve is installed in the mixing chamber, wherein the mixer further comprises a sliding rod and a cleaning brush, wherein two mutually parallel sliding rods movably connect the three heating plates together, and the cleaning brush is detachably connected to the shaft sleeve.

[0007] Optionally, a feed channel connected to the mixing chamber is arranged on the top of the middle heating plate, and the mixer also includes a flushing component, which includes a liquid storage tank, a water pump and a nozzle connected by pipelines, and the nozzle is used to spray cleaning liquid into the feed channel.

[0008] Optionally, the nozzle is rotatably connected to the top of the middle heating plate via a rotating bracket.

[0009] Optionally, the flushing assembly further comprises a water receiving trough, the water receiving trough opening faces upward and is located below the three heating plates.

[0010] Optionally, the cleaning brush includes a central shaft, a first end plate, a second end plate, a sleeve and a spring, the central shaft is a polygonal column structure, the end face of one end of the central shaft is fixedly connected to the first end plate, the other end of the central shaft is suitable for detachable connection with the sleeve, the second end plate and the sleeve can be slidably mounted on the outside of the central shaft, bristles are arranged on the outer wall of the sleeve and on the opposite sides of the first end plate and the second end plate, and the spring is arranged between the sleeve and the first end plate and between the sleeve and the second end plate.

[0011] Optionally, one end of the two sliding rods is fixedly connected to the right heating plate, and the other ends of the two sliding rods are fixedly connected to the limiting plate. The left heating plate and the middle heating plate are slidably connected to the two sliding rods located between the right heating plate and the limiting plate, and a tightening screw is threadedly connected to the limiting plate.

[0012] Compared with the prior art, the utility model provides a device for melting and blending raw materials for producing cross-linked polyethylene cables, which has the following beneficial effects:

[0013] The utility model can realize electric cleaning of the mixing chamber by connecting the cleaning brush with the original driving motor of the mixer, effectively reducing the labor intensity of cleaning and improving the cleaning efficiency. In addition, when adopting this cleaning method, there is no need to completely remove the heating plate, which can avoid the trouble of frequent installation and removal of the heating plate, and further improve the maintenance convenience of the equipment.

[0014] The utility model provides a flushing assembly. When the cleaning brush cleans the mixing chamber, the cleaning liquid is sprayed into the feed channel through the nozzle in the flushing assembly. The spraying of the cleaning liquid helps to soften and dissolve the residual material, so that the cleaning brush can clean the residual material in the mixing chamber faster and more thoroughly.

[0015] The cleaning brush of the utility model comprises a central shaft, a first end plate, a second end plate, a sleeve and a spring. When the cleaning brush is used to clean the mixing chamber, the bristles on the central shaft can clean the inner wall of the mixing channel, the bristles on the first end plate can clean the left sealing surface of the left heating plate, and the bristles on the second end plate can clean the right sealing surface of the right heating plate. In this way, the cleaning brush can achieve the purpose of cleaning the inner wall of the entire mixing chamber. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0017] Figure 2 This is a schematic diagram of the structure of the mixer of the utility model after the machine platform is removed;

[0018] Figure 3 This is a schematic diagram of the structure of the utility model without the rotor and the cleaning brush installed;

[0019] Figure 4 This is a schematic diagram of the structure of the installation cleaning brush of the utility model;

[0020] Figure 5 This is a schematic diagram of the structure of the installation rotor of the utility model;

[0021] Figure 6 It is a schematic structural diagram of the cleaning brush, rotor and shaft sleeve of the utility model.

[0022] In the figure: 1. main machine; 2. machine table; 3. left heating plate; 30. left sealing surface; 4. middle heating plate; 40. mixing channel; 41. feeding channel; 5. right heating plate; 50. right sealing surface; 7. bushing; 8. rotor; 80. connecting end; 9. gear; 10. docking shaft; 11. gear box; 12. sliding rod; 13. cleaning brush; 130. central axis; 131. first end plate; 132. second end plate; 133. sleeve; 134. spring; 135. bristles; 14. feeding hopper; 15. pressing device; 16. flushing assembly; 160. liquid storage tank; 161. water pump; 162. nozzle; 163. water tank; 17. rotating bracket; 170. rotating motor; 171. bracket body; 18. limit plate; 19. tightening screw. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] Example: See Figures 1 to 6According to an embodiment of the utility model, a device for melting and blending raw materials for producing cross-linked polyethylene cables is provided, which mainly includes a main unit 1 and a mixer that can be separated from each other, wherein the mixer includes a machine 2 and a mixing chamber composed of three heating plates arranged on the top of the machine 2, and the three heating plates can heat the materials in the mixing chamber by resistance heating. Specifically, resistance wires or resistance bands can be embedded in the three heating plates. The three heating plates are a middle heating plate 4 and a left heating plate 3 and a right heating plate 5 located on the left and right sides of the middle heating plate 4, respectively. A mixing channel 40 with openings at both ends constituting the mixing chamber is provided on the middle heating plate 4, the left heating plate 3 has a left sealing surface 30 for covering the opening at one end of the mixing channel 40, and the right heating plate 5 has a right sealing surface 50 for covering the opening at the other end of the mixing channel 40. The mixing chamber is formed between the mixing channel 40, the left sealing surface 30 and the right sealing surface 50, and a shaft driven to rotate by a driving motor installed on the main unit 1 is rotatably connected to the right heating plate 5 through a bearing. Sleeve 7, a rotor 8 detachably connected to the shaft sleeve 7 is installed in the mixing chamber. In this example, two rotors 8 are provided, and correspondingly, two shaft sleeves 7 are provided. The two shaft sleeves 7 are linked by two gears 9, one of which is fixed on one shaft sleeve 7, and the other gear 9 is fixed on the other shaft sleeve 7. A docking shaft 10 is also fixed on one shaft sleeve 7, and the docking shaft 10 is used to connect the output shaft of the driving motor on the main machine 1. The two gears 9 are encapsulated in a gear box 11, and a torque sensor (not shown) for measuring the torque of the shaft sleeve 7 is provided on the shaft sleeve 7. The torque sensor is used to capture and record the torque signal generated by the rotor 8 during the mixing process. The gear box 11 is fixedly connected to the machine 2 of the mixer by screws; the mixer also includes two parallel sliding rods 12 and a cleaning brush 13. The two sliding rods 12 movably connect the three heating plates together, and the cleaning brush 13 is detachably connected to the shaft sleeve 7.

[0025] The cross-linked polyethylene cable production raw material melt blending device adopts the above structure. When measuring the material, the rotor 8 is driven to rotate by the driving motor to apply shear force to the cross-linked polyethylene cable material placed in the mixing chamber. As the cross-linked polyethylene cable material flows, it will generate resistance to the rotor 8, and this resistance is converted into a torque signal, which is captured and recorded by the torque sensor. By analyzing the change of torque over time, the rheological properties of the sample can be obtained. After the measurement is completed, when it is necessary to clean the residual material in the mixing chamber, the three heating plates are slid along the sliding rod 12 and separated by a certain distance, and then the rotor 8 is taken out from the mixing chamber, and then the cleaning brush 13 is placed in the mixing chamber and fixedly connected to the sleeve 7, and the mixing chamber can be cleaned by driving the cleaning brush 13 to rotate by the driving motor. It can be seen that the cross-linked polyethylene cable production raw material melt blending device can realize electric cleaning of the mixing chamber by connecting the cleaning brush 13 to the original driving motor of the mixer, effectively reducing the labor intensity of cleaning and improving the cleaning efficiency, and when this cleaning method is adopted, there is no need to completely remove the heating plate, which can avoid the trouble of frequent loading and unloading of the heating plate, and further improve the maintenance convenience of the equipment.

[0026] In order to facilitate the feeding, in this exemplary embodiment, a feeding channel 41 connected to the mixing chamber is provided on the top of the middle heating plate 4, a detachable feeding hopper 14 is installed on the feeding channel 41, and a pressing device 15 is provided above the feeding hopper 14. The pressing device 15 adopts the existing pressing device 15 to ensure that the material can be evenly pressed into the mixing chamber. In order to facilitate the cleaning of the mixing chamber, in this example, the mixer also includes a flushing component 16, which includes a liquid storage tank 160, a water pump 161 and a nozzle 162 connected by a pipeline, and the nozzle 162 is used to spray cleaning liquid in the feeding channel 41. After such arrangement, when the cleaning brush 13 cleans the mixing chamber, a cleaning liquid (such as alcohol) is added to the liquid storage tank 160, the water pump 161 is started, and the nozzle 162 sprays the cleaning liquid into the feeding channel 41. The spraying of the cleaning liquid helps to soften and dissolve the residual material, so that the cleaning brush 13 can clean the residual material in the mixing chamber faster and more thoroughly.

[0027] In this exemplary embodiment, the nozzle 162 is rotatably connected to the top of the middle heating plate 4 through the rotating bracket 17. The rotating bracket 17 specifically includes a rotating motor 170 and a bracket body 171. The housing of the rotating motor 170 is fixedly mounted on the middle heating plate 4. One end of the bracket body 171 is fixed to the output shaft of the rotating motor 170, and the nozzle 162 is mounted on the other end of the bracket body 171. When it is necessary to add material to the feed channel 41, the nozzle 162 can be removed from above the feed channel 41 to facilitate the addition of material to the feed channel 41; when it is necessary to add cleaning liquid to the feed channel 41, the nozzle 162 can be moved to the top of the feed channel 41 to ensure that the cleaning liquid can be accurately added to the feed channel 41.

[0028] In order to collect the washed materials and wastewater in the mixing chamber, in this exemplary embodiment, the washing assembly 16 further includes a water receiving tank 163, which opens upward and is located below the three heating plates. During washing, a certain gap is maintained between the three heating plates, and the washed wastewater and materials flow into the water receiving tank 163 from the gap position to prevent the wastewater and materials from falling onto the machine 2 and contaminating the machine 2.

[0029] In this exemplary embodiment, the cleaning brush 13 includes a central shaft 130, a first end plate 131, a second end plate 132, a sleeve 133 and a spring 134. The central shaft 130 is a polygonal column structure, and the sleeve 7 is provided with a hexagon that matches the shape of the central shaft 130. The end face of one end of the central shaft 130 is fixedly connected to the first end plate 131, and the other end of the central shaft 130 is suitable for a detachable connection with the sleeve 7. The second end plate 132 and the sleeve 7 can be slidably mounted on the outside of the central shaft 130. Bristles 135 are provided on the outer wall of the sleeve 7 and on the opposite sides of the first end plate 131 and the second end plate 132. Springs 134 are provided between the sleeve 7 and the first end plate 131, and between the sleeve 7 and the second end plate 132. After being arranged in this way, when using the cleaning brush to clean the mixing chamber, the cleaning brush is connected with the sleeve 7 through the central shaft 130, and the bristles 135 on the outer wall of the central shaft 130 fit with the inner wall of the mixing channel 40. The side of the first end plate 131 with the bristles 135 is tightly fitted with the left sealing surface 30 of the left heating plate 3 under the elastic force of the spring 134, and the side of the second end plate 132 with the bristles 135 is tightly fitted with the right sealing surface 50 of the right heating plate 5 under the elastic force of the spring 134. When the driving motor is started, the sleeve 7 rotates, and the sleeve 7 drives the cleaning brush to rotate. The bristles 135 on the central shaft 130 can clean the inner wall of the mixing channel 40, the bristles 135 on the first end plate 131 can clean the left sealing surface 30 of the left heating plate 3, and the bristles 135 on the second end plate 132 can clean the right sealing surface 50 of the right heating plate 5. In this way, the cleaning brush can achieve the purpose of cleaning the inner wall of the entire mixing chamber. Of course, in order to facilitate the connection between the rotor 8 and the sleeve 7, one end of the rotor 8 has a connection end 80 with the same structure as the central shaft 130. In addition, in order to improve the firmness of the connection between the rotor 8 and the sleeve 7, and between the cleaning brush 13 and the sleeve 7, a magnetic fixing method can be added between the sleeve 7 and the rotor 8 and the cleaning brush 13.

[0030] In this exemplary embodiment, one end of the two sliding rods 12 is fixedly connected to the right heating plate 5, and the other end of the two sliding rods 12 is fixedly connected to the limiting plate 18. The left heating plate 3 and the middle heating plate 4 are slidably connected to the two sliding rods 12 located between the right heating plate 5 and the limiting plate 18, and the limiting plate 18 is threadedly connected with a tightening screw 19. In this arrangement, when the three heating plates need to be fixed together, the tightening screw 19 can be tightened to the left heating plate 3 by tightening the tightening screw 19. When the three heating plates need to be separated, the tightening screw 19 can be loosened to allow the left heating plate 3 and the middle heating plate 4 to slide freely on the sliding rod, thereby separating the three heating plates.

[0031] Working principle: When measuring the material, the rotor 8 is driven to rotate by the driving motor to apply shear force to the cross-linked polyethylene cable material placed in the mixing chamber. As the cross-linked polyethylene cable material flows, it will generate resistance to the rotor 8, and this resistance is converted into a torque signal, which is captured and recorded by the torque sensor. By analyzing the change of torque over time, the rheological properties of the sample can be obtained. After the measurement is completed, when it is necessary to clean the residual material in the mixing chamber, the three heating plates are slid along the sliding rod 12 and separated by a certain distance, and then the rotor 8 is taken out of the mixing chamber, and then the cleaning brush 13 is placed in the mixing chamber and fixedly connected to the sleeve 7. The mixing chamber can be cleaned by driving the cleaning brush 13 to rotate by the driving motor. It can be seen that the cross-linked polyethylene cable production raw material melt blending device can realize electric cleaning of the mixing chamber by connecting the cleaning brush 13 to the original driving motor of the mixer, effectively reducing the labor intensity of cleaning and improving the cleaning efficiency. In addition, when this cleaning method is adopted, there is no need to completely remove the heating plate, which can avoid the trouble of frequent loading and unloading of the heating plate, and further improve the maintenance convenience of the equipment.

[0032] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for melt blending raw materials for producing cross-linked polyethylene cables, comprising a main machine (1) and a mixer, wherein the mixer comprises a mixing chamber composed of three heating plates, wherein the three heating plates are a middle heating plate (4), a left heating plate (3) and a right heating plate (5), wherein the right heating plate (5) is connected to a shaft sleeve (7) driven to rotate by a driving motor installed on the main machine (1), and a rotor (8) detachably connected to the shaft sleeve (7) is installed in the mixing chamber, wherein the mixing chamber comprises: The mixer further comprises a sliding rod (12) and a cleaning brush (13); two sliding rods (12) parallel to each other movably connect the three heating plates together; and the cleaning brush (13) is detachably connected to the shaft sleeve (7).

2. The device for melt blending raw materials for producing cross-linked polyethylene cables according to claim 1, characterized in that: A feed channel (41) communicating with the mixing chamber is disposed on the top of the middle heating plate (4). The mixer further comprises a flushing assembly (16). The flushing assembly (16) comprises a liquid storage tank (160), a water pump (161) and a nozzle (162) connected by pipelines. The nozzle (162) is used to spray cleaning liquid into the feed channel (41).

3. The device for melt blending raw materials for producing cross-linked polyethylene cables according to claim 2, characterized in that: The spray head (162) is rotatably connected to the top of the middle heating plate (4) via a rotating bracket (17).

4. The device for melt blending raw materials for producing cross-linked polyethylene cables according to claim 2, characterized in that: The flushing assembly (16) further comprises a water receiving trough (163), the water receiving trough (163) opening upwards and located below the three heating plates.

5. The device for melt blending raw materials for producing cross-linked polyethylene cables according to any one of claims 1 to 4, characterized in that: The cleaning brush (13) comprises a central shaft (130), a first end plate (131), a second end plate (132), a sleeve (133) and a spring (134); the central shaft (130) is a multi-prism structure; an end surface of one end of the central shaft (130) is fixedly connected to the first end plate (131); the other end of the central shaft (130) is suitable for being detachably connected to the shaft sleeve (7); the second end plate (132) and the shaft sleeve (7) are both slidably sleeved on the outside of the central shaft (130); bristles (135) are arranged on the outer wall of the shaft sleeve (7) and on the opposite sides of the first end plate (131) and the second end plate (132); and the spring (134) is arranged between the shaft sleeve (7) and the first end plate (131) and between the shaft sleeve (7) and the second end plate (132).

6. The device for melt blending raw materials for producing cross-linked polyethylene cables according to any one of claims 1 to 4, characterized in that: One end of the two sliding rods (12) is fixedly connected to the right heating plate (5), and the other end of the two sliding rods (12) is fixedly connected to the limiting plate (18); the left heating plate (3) and the middle heating plate (4) are slidably connected to the two sliding rods (12) located between the right heating plate (5) and the limiting plate (18); and a tightening screw (19) is threadedly connected to the limiting plate (18).

Images