Can shaking device for cross-linked insulating material for cable

Abstract

The invention discloses a cross-linked insulating material tank shaking device for cables, and relates to the technical field of tank shaking, the cross-linked insulating material tank shaking device comprises a tank body, the middle of the tank body is rotatably connected to a fixing frame, a motor used for driving the tank body to rotate is arranged in the fixing frame, and the cross-linked insulating material tank shaking device further comprises a water heat supply unit, the hot water tank is connected with the tank body through a water inlet pipe and a water outlet pipe, a heat exchange channel is arranged between the water inlet pipe and the water outlet pipe in the tank body, and water distribution grooves communicated with the heat exchange channel are fixedly arranged on two sides of the tank body. Heat is supplied to the cable insulation material in a water heating mode, the heating time can be effectively shortened, the rotary drying efficiency of the cable insulation material is improved, shaking tank heating is safer and more reliable, cable material wire drawing cannot be caused, and hot water heating is free of pollution and more environmentally friendly. In addition, the movable guide plate is arranged in the shaking tank, so that the phenomenon that the cable material is crushed or powdery can be reduced, and the quality of the cable insulating material after crosslinking can be improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of rocking tanks, and particularly relates to a rocking tank device for cross-linked insulating materials used in cables. Background Art

[0002] A rocking tank is a device for rotary drying of cross-linked insulating materials used in cables. Most of the existing rocking tanks use oil heating to supply heat to the rocking tank. Due to the low specific heat and thermal conductivity of oil, the heating and drying time is long. Generally, it takes about 40 minutes to heat a 2500L rocking tank. After rotary drying, the cross-linked insulating material is cooled naturally from 90°C to 30°C, and the material cooling takes a long time. The temperature of the hot oil is not easy to control. When the temperature controller fails, the oil temperature may exceed the required temperature of 90°C for the cross-linked insulating material, resulting in phenomena such as the cross-linked insulating material drawing wire. The hot oil will produce waste oil after leakage or use for a period of time, and improper treatment will cause certain pollution to the environment. In addition, when the rocking tank rotates, due to the large drop of the cable material in the tank, it is easy to appear crushed particles and powder, reducing the quality of the cable material after rotary drying. Summary of the Invention

[0003] The purpose of the present invention is to solve the disadvantages of hot oil heating and the appearance of crushed particles and powder in the prior art, and to propose a rocking tank device for cross-linked insulating materials used in cables. The rocking tank device for cross-linked insulating materials used in cables can effectively reduce the heating time, improve the efficiency of rotary drying of cable insulating materials, the rocking tank heating is safer and more reliable, and is also more environmentally friendly. In addition, it will not cause the cross-linked insulating material to draw wire, can reduce the appearance of crushed particles or powder in the cable material, and can improve the quality of the cross-linked cable insulating material.

[0004] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0005] Design a rocking tank device for cross-linked insulating materials used in cables, including a tank body, the middle part of the tank body is rotatably connected to a fixed frame, and a motor for driving the tank body to rotate is arranged in the fixed frame. It also includes: a water heating unit, the water heating unit provides hot water circulation at a constant temperature for the tank body, the water heating unit includes a hot water tank, the hot water tank is connected to the tank body through a water inlet pipe and a water outlet pipe, a heat exchange channel is arranged between the water inlet pipe and the water outlet pipe in the tank body, and water distribution tanks communicated with the heat exchange channel are fixedly arranged on both sides of the tank body.

[0006] Further, at least one end of the tank body is provided with an electric butterfly valve.

[0007] Further, an outer hollow rotating shaft is fixedly arranged in the middle of the water distribution tanks on both sides of the tank body, the outer hollow rotating shaft is rotatably connected to the fixed frame, one side of the outer hollow rotating shaft is driven by the motor, and the water inlet pipe and the water outlet pipe are connected to the inside of the outer hollow rotating shaft through an outer water seal sleeve.

[0008] Furthermore, the heat exchange channel includes a hot water jacket which is fixedly arranged outside the tank body to form an external heating flow layer outside the tank body. Both sides of the hot water jacket communicate with the water distribution tanks on both sides respectively.

[0009] Furthermore, a plurality of partition plates are evenly distributed inside the hot water jacket, and diversion channels are formed between the partition plates. Water distribution holes corresponding to the diversion channels one by one are arranged on the side parts of the water distribution tanks on both sides.

[0010] Furthermore, the heat exchange channel further includes a plurality of diversion plates which are evenly distributed in the tank body along the axial direction of the tank body to form an internal heating flow layer inside the tank body. Both sides of the diversion plates communicate with the water distribution tanks on both sides of the tank body respectively.

[0011] Furthermore, inner hollow rotating shafts are fixed on both sides of the diversion plates. The inner hollow rotating shafts on both sides are respectively rotatably connected to the water distribution tanks on both sides, and inner water seal shaft sleeves are arranged between the water distribution tanks and the inner hollow rotating shafts.

[0012] Furthermore, the two sides of the diversion plate located on the inner hollow rotating shaft are respectively a long plate side and a short plate side. A counterweight is arranged on the short plate side of the diversion plate. The long plate sides and the short plate sides of the plurality of diversion plates are arranged alternately. When the tank body rotates to be in a vertical state, a Z-shaped blanking channel is formed inside the tank body, and limiting columns are respectively arranged above and below the short plate side of the diversion plate where the water distribution tank is located.

[0013] Furthermore, a heater is arranged between the cold water tank and the hot water tank to maintain the temperature of the hot water tank at 90°C.

[0014] Furthermore, a water cooling unit is further included. The water cooling unit includes a cold water tank which is connected to the tank body through a water inlet pipe and a water outlet pipe, and a heat pump transducer is arranged between the cold water tank and the hot water tank.

[0015] The beneficial effects of a rocking tank device for cross-linked insulating material of cables proposed by the present invention are as follows:

[0016] (1). The present invention uses water heating to supply heat to the cable insulating material. Compared with oil heating, the specific heat and heat transfer coefficient of heating can be improved. The heat conduction ability of water is better than that of heat conduction oil, and the efficiency of using water is higher than that of oil, which can effectively reduce the heating time. In addition, after rotary drying is completed, cold water cooling can be carried out in the rocking tank to shorten the cooling time of the cable material, greatly improving the efficiency of rotary drying of the cable insulating material. In addition, through the double heat exchange channel design of the external heating flow layer and the internal heating flow layer, the efficiency of rotary drying can be further improved.

[0017] (2) The hot water heating adopted by the present invention is safer and more reliable. Its maximum temperature will not cause wire drawing of the cable insulation material, is easy to control the temperature, and water has good fluidity, is easy to transport, and has low requirements for the transfer pump. In addition, hot water is pollution-free and more friendly to the environment.

[0018] (3) The rotatable deflector plate of the present invention can form a Z-shaped feeding channel in the rocking tank. On the one hand, it can increase the heat exchange area and improve the efficiency of rotary drying. On the other hand, it can reduce the drop of the cable material in the rocking tank, play a buffering role, reduce the phenomenon of the cable material appearing as broken particles or powder, and improve the quality of the cable insulation material after cross-linking. Description of the Drawings

[0019] The drawings are used to provide a further understanding of the present invention, and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention. In the drawings:

[0020] Figure 1 is the structural schematic diagram of the present invention;

[0021] Figure 2 is the three-dimensional structural schematic diagram of the tank body of the present invention;

[0022] Figure 3 is the internal structural schematic diagram of the tank body of the present invention when the tank body rotates to a horizontal state;

[0023] Figure 4 is the internal structural schematic diagram of the tank body of the present invention when the tank body rotates to a vertical state;

[0024] Figure 5 is Figure 4 the cross-sectional structural schematic diagram of the present invention at A-A in;

[0025] Figure 6 is the distribution schematic diagram of the internal deflector plates of the tank body of the present invention in two vertical states;

[0026] In the figure, the labels are: 1, tank body; 11, electric butterfly valve; 12, motor; 13, water distribution tank; 131, water distribution holes; 14, outer hollow rotating shaft; 15, heat preservation jacket; 16, outer water seal shaft sleeve; 17, partition board; 2, fixing frame; 3, hot water water tank; 4, water inlet pipe; 41, hot water pump; 42, tap water pipe; 43, inlet solenoid valve; 5, water outlet pipe; 6, cold water water tank; 61, cold water pump; 7, heater; 8, hot water jacket; 9, deflector plate; 91, inner hollow rotating shaft; 92, inner water seal shaft sleeve; 93, counterweight; 94, limit post. Detailed Embodiments

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention; obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0028] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "top / bottom end", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0029] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "provided with", "sheathed / connected", "connection", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0030] Now, in combination with the accompanying drawings of the specification, the structural features of the present invention will be described in detail.

[0031] Embodiment 1

[0032] See Figures 1-5 , a rocking tank device for cross-linked insulating material of cables, including a tank body 1 with a volume of 1000 - 3500 L. Both ends of the tank body 1 are provided with openings, and at least one end of the tank body 1 is provided with an electric butterfly valve 11, which facilitates the feeding and discharging of the tank body 1. The middle part of the tank body 1 is rotatably connected to a fixed frame 2, and a motor 12 for driving the tank body 1 to rotate is arranged in the fixed frame 2. The motor 12 is a reduction motor and can drive the tank body 1 to rotate evenly.

[0033] It also includes a water heating unit which provides hot water circulation at a constant temperature for the tank body 1. The water heating unit includes a hot water tank 3 with a volume of 10T. The hot water tank 3 is connected to the tank body 1 through a water inlet pipe 4 and a water outlet pipe 5. In order to achieve the transmission of hot water, a hot water pump 31 is provided on the water outlet pipeline of the hot water tank 3. A heat exchange channel is provided between the water inlet pipe 4 and the water outlet pipe 5 inside the tank body 1. Through the heat exchange channel, the cable insulating material inside the drying tank body 1 can be heated to make it crosslinked. In order to make the water inlet of the heat exchange channel more uniform and cover the tank body 1, water distribution troughs 13 communicated with the heat exchange channel are fixedly arranged on both sides of the tank body 1. The water distribution troughs 13 are fixedly arranged in a strip shape on both sides of the tank body 1. In order to be able to supply water to the inside of the tank body 1 without affecting the shaking and rotation of the tank body 1, outer hollow rotating shafts 14 are fixedly arranged in the middle of the water distribution troughs 13 on both sides of the tank body 1. The outer hollow rotating shafts 14 are rotatably connected to the fixing frame 2. A bearing connection is adopted between the outer hollow rotating shafts 14 and the fixing frame 2. One side of the outer hollow rotating shaft 14 is driven by a motor 12. Under the drive of the motor 12, the tank body 1 rotates. The water inlet pipe 4 and the water outlet pipe 5 are connected to the inside of the outer hollow rotating shaft 14 through an outer water seal shaft sleeve 16. The function of the outer water seal shaft sleeve 16 is to play a sealing role without affecting the rotation of the outer hollow rotating shaft 14.

[0034] Among them, the heat exchange channel includes a hot water jacket 8 which is fixedly arranged on the outer side of the tank body 1 to form an outer heating flow layer outside the tank body 1. Both sides of the hot water jacket 8 are respectively communicated with the water distribution troughs 13 on both sides. In order to make the hot water pass through the hot water jacket 8 evenly during the shaking process of the tank body 1, a plurality of partition plates 17 are evenly distributed inside the hot water jacket 8. Flow guiding channels are formed between the partition plates 17. Water distribution holes 131 corresponding to the flow guiding channels one by one are provided on the side parts of the water distribution troughs 13 on both sides. Through the partition plates 17, the hot water can be evenly distributed outside the tank body 1, so that when the tank body 1 rotates, the whole is heated more evenly, which is beneficial to the crosslinking of the cable material.

[0035] The rocking tank device for cross-linked insulating material of cables in the present invention uses water heating to supply heat to the cable insulating material. Compared with oil heating, it can increase the specific heat and thermal conductivity of heating. The heat conduction ability of water is better than that of heat-conducting oil, and using water is more efficient than using oil, which can effectively reduce the heating time. With a traditional heat-conducting oil system: preheating takes 10 minutes, feeding takes 18 minutes, heating takes 40 minutes (where heating and rocking the tank overlap), rocking the tank takes 2 hours, and discharging takes 5 minutes. For one tank of cross-linked insulating material for cables, it takes at least 2 hours and 33 minutes; the temperature of the discharged material is about 85 °C, which brings a large amount of heat to the packaging room. It is estimated that heating at 45 kw for 40 minutes is equivalent to heating at 30 kw for one hour, that is, 30 degrees of electricity, and another 25 - 30 degrees of electricity are needed for transportation and cooling. However, through water heating and drying, feeding takes 10 minutes, without preheating, the temperature rise is less than 20 minutes, rocking for two hours as well, cooling inside the tank takes 10 minutes, and discharging takes 5 minutes, with a total time of 2 hours and 30 minutes. The cross-linked insulating material for cables can be cooled to 5 - 10 °C higher than the ambient temperature, without generating condensed water, and then transported to the packaging room, so the electricity required for cooling can be reduced. Secondly, the cross-linked insulating material for cables cooled in the rocking tank is not easy to draw wires and break during transportation, and the product quality is better. At the same time, the packaging temperature is low, and it can be transported out of the packaging room in time, so the packaging room can be reduced. The low temperature in the packaging room can be cooled by positive pressure air supply. Thus, compared with traditional oil heating, the time is significantly shortened, the heating time can be effectively reduced, and the efficiency of rotary drying of cable insulating materials can be improved. In addition, using hot water heating is safer and more reliable. Its maximum temperature is 100 °C, which will not cause the decomposition of DCP in the cross-linked insulating material for cables and will not cause wire drawing of the cable insulating material. Among them, DCP is a chemical cross-linking agent, dicumyl peroxide, which will cross-link or decompose at temperatures above 110 °C, and even explode. Therefore, using water heating is safer and easier to control the temperature. In addition, hot water is pollution-free and more environmentally friendly.

[0036] Example 2

[0037] Refer to Figures 1-5 , as another preferred embodiment of the present invention, different from Example 1, the heat exchange channel further includes a plurality of flow guiding plates 9. The plurality of flow guiding plates 9 are evenly distributed in the tank body 1 along the axial direction of the tank body 1, forming an internal heating flow layer inside the tank body 1. Both sides of the flow guiding plate 9 communicate with the water distribution tanks 13 on both sides of the tank body 1 respectively. By forming an internal heating flow layer inside the tank body 1, a double heat exchange channel of an external heating flow layer and an internal heating flow layer is formed outside and inside the rocking tank, which can further improve the efficiency of rotary drying.

[0038] Example 3

[0039] Refer to Figures 1-6, as another preferred embodiment of the present invention, different from Embodiment 2, inner hollow rotating shafts 91 are fixed on both sides of the deflector 9. The inner hollow rotating shafts 91 on both sides are respectively rotatably connected to the water distribution troughs 13 on both sides. An inner water seal shaft sleeve 92 is provided between the water distribution trough 13 and the inner hollow rotating shaft 91. The deflector 9 can deflect inside the tank body 1. The two sides of the deflector 9 located on the inner hollow rotating shaft 91 are respectively the long plate side and the short plate side. A counterweight 93 is provided on the short plate side of the deflector 9. The long plate sides and the short plate sides of multiple deflectors 9 are arranged alternately. When the tank body 1 rotates to a vertical state, under the action of the counterweight 93, the deflectors 9 at each position deflect towards the direction of the counterweight 93. In order to limit the up and down deflection angles of the deflector 9, limit posts 94 are respectively arranged above and below the water distribution trough 13 on the short plate side of the deflector 9. The deflected deflector 9 can form a Z-shaped feeding channel inside the tank body 1. In this way, on the one hand, the heat exchange area for the cable material can be increased, and the efficiency of rotary drying can be improved. On the other hand, the drop of the cable material in the rocking tank can be reduced, playing a buffering role, and the phenomenon of the cable material appearing as fragments or powder can be reduced, improving the quality of the crosslinked cable insulation material.

[0040] Embodiment 4

[0041] Refer to Figures 1-5 , as another preferred embodiment of the present invention, different from Embodiment 1, it further includes a water cooling unit. The water cooling unit includes a cold water tank 6. The cold water tank 6 is connected to the tank body 1 through a water inlet pipe 4 and a water outlet pipe 5. In order to realize the transportation of cold water, a cold water pump 61 is arranged on the water outlet pipeline of the cold water tank 6. A heat pump transducer is provided between the cold water tank 6 and the hot water tank 3. The heat pump transducer is used for heating the water inside the hot water tank 3 and cooling the water inside the cold water tank 6. The water cooling unit cools the crosslinked cable insulation material in the heat exchange channel, which can shorten the cooling time of the cable material and improve the efficiency of rotary drying of the cable material. In order to facilitate the switching of the hot water and cold water pipelines, independent solenoid valves are arranged on the inlet and outlet pipelines of the cold water tank 6 and the hot water tank 3 to control the heating or cooling of the tank body 1.

[0042] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A device for shaking a can of cross-linked insulating material for cables, comprising a can body (1), wherein the middle part of the can body (1) is rotatably connected to a fixing frame (2), wherein a motor (12) for driving the can body (1) to rotate is arranged in the fixing frame (2), characterized in that: Also includes: A water heating unit, the water heating unit provides a tank body (1) with hot water circulation at a constant temperature, the water heating unit comprising a hot water tank (3), the hot water tank (3) being connected to the tank body (1) via a water inlet pipe (4) and a water outlet pipe (5), a heat exchange channel being provided in the tank body (1) between the water inlet pipe (4) and the water outlet pipe (5), and water distribution grooves (13) communicating with the heat exchange channel being fixedly provided on both sides of the tank body (1).

2. A device for shaking a cross-linked insulating material for a cable according to claim 1, characterized in that: An electric butterfly valve (11) is provided at at least one end of the tank body (1).

3. A device for shaking a cross-linked insulating material for a cable according to claim 1, characterized in that: An external hollow rotating shaft (14) is fixedly provided in the middle of the water distribution grooves (13) on both sides of the tank body (1), and the external hollow rotating shaft (14) is rotatably connected to the fixing frame (2). The external hollow rotating shaft (14) on one side is driven by the motor (12), and the water inlet pipe (4) and the water outlet pipe (5) are connected to the external hollow rotating shaft (14) through an external water seal sleeve (16).

4. A device for shaking a cross-linked insulating material for a cable according to claim 1, characterized in that: The heat exchange channel comprises a hot water jacket (8), the hot water jacket (8) being fixedly arranged on the outside of the tank body (1) to form an external heat flux layer outside the tank body (1), and the two sides of the hot water jacket (8) are respectively connected to the water distribution troughs (13) on the two sides.

5. A device for shaking a cross-linked insulating material for a cable according to claim 4, characterized in that: A plurality of partitions (17) are evenly distributed inside the hot water jacket (8), a flow guide channel is formed between the partitions (17), and the sides of the water distribution grooves (13) on both sides are provided with water distribution holes (131) corresponding to the flow guide channels one by one.

6. A device for shaking a cross-linked insulating material for a cable according to claim 1, characterized in that: The heat exchange channel further comprises a plurality of guide plates (9), the plurality of guide plates (9) being evenly distributed in the tank body (1) along the axial direction of the tank body (1) to form an internal heat exchange layer inside the tank body (1), and the two sides of the guide plates (9) are respectively in communication with the water distribution grooves (13) on the two sides of the tank body (1).

7. A device for shaking a cross-linked insulating material for a cable according to claim 6, characterized in that: Inner hollow rotating shafts (91) are fixed on both sides of the guide plate (9), and the inner hollow rotating shafts (91) on both sides are rotatably connected to the water distribution grooves (13) on both sides respectively, and an inner water seal sleeve (92) is provided between the water distribution groove (13) and the inner hollow rotating shaft (91).

8. A device for shaking a cross-linked insulating material for a cable according to claim 7, characterized in that: The guide plates (9) are located on both sides of the inner hollow rotating shaft (91), which are respectively the long plate side and the short plate side. The guide plates (9) are provided with a counterweight (93) on the short plate side. The long plate sides and the short plate sides of the plurality of guide plates (9) are arranged alternately. When the tank body (1) rotates in a vertical state, a Z-shaped material discharge channel is formed in the tank body (1). The water distribution trough (13) is located on the short plate side of the guide plate (9) and is provided with limit columns (94) above and below.

9. A device for shaking a cross-linked insulating material for a cable according to claims 1-8, characterized in that: A heater (7) is provided between the cold water tank (6) and the hot water tank (3) to maintain the temperature of the hot water tank (3) at 90°C.

10. A device for shaking a cross-linked insulating material for a cable according to claims 1-8, characterized in that: It also includes a water cooling unit, which includes a cold water tank (6). The cold water tank (6) is connected to the tank body (1) via a water inlet pipe (4) and a water outlet pipe (5). A heat pump transducer is provided between the cold water tank (6) and the hot water tank (3).

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