A high-efficiency energy-saving rubber double-screw extruder

Abstract

The application relates to the technical field of extruders, in particular to a high-efficiency energy-saving rubber double-screw extruder, which comprises a rack, a cylinder, a heating assembly and a cooling assembly, the rack is provided with a base, a stand and a supporting seat arranged on the base, the tail end of the cylinder is provided with an extruder head, the inside of the cylinder is provided with a first screw rod and a second screw rod, the head end of the cylinder is provided with a driving assembly and a power distribution box; the heating assembly comprises a heat-conducting inner lining, a medium flow channel, a pipeline electric heater, a first water pipe and a second water pipe; the heat-conducting inner lining is attached to the inner wall of the cylinder; the medium flow channel is arranged between the heat-conducting inner lining and the inner wall of the cylinder, the head end and the tail end of the medium flow channel are respectively provided with a water inlet and a water outlet; and the pipeline electric heater is arranged at the bottom of the inner cavity of the supporting seat. The application can effectively control the temperature inside the cylinder, so that the temperature is within a proper range, and the forming quality of the rubber is ensured.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of extruders, in particular to a high-efficiency energy-saving rubber double-screw extruder. BACKGROUND

[0002] The conical double extruder is a high-efficiency mixing and extruding device. When the conical double extruder is in production, the raw material in the main shaft barrel is melted into a molten state by a heater, and then the molten rubber is extruded by two conical screws, and finally is formed by a corresponding mold. The machine has the characteristics of small shear rate, difficult decomposition of material, uniform plasticizing and mixing, stable quality, high yield, wide application range, long service life and the like.

[0003] Unlike traditional plastic, chemical fiber and other high molecular raw materials, rubber is sensitive to the temperature during molding, so the temperature cannot be too high, otherwise the mixing quality will be affected, and in severe cases, burning of rubber will occur. Therefore, when producing rubber, it is necessary to ensure that the temperature inside the barrel is moderate within a suitable range. SUMMARY

[0004] In view of the above problems, the application provides a high-efficiency energy-saving rubber double-screw extruder. A medium flow channel is arranged on the inner wall of the barrel, and a heating medium circulates in the medium flow channel. A cooling flow channel is arranged in the screw, so that the excess temperature in the barrel is taken away when the screw rotates, thereby ensuring that the temperature inside the barrel is within a suitable range.

[0005] To solve the problems in the prior art, the application provides a high-efficiency energy-saving rubber double-screw extruder, which comprises a rack, a barrel, a heating assembly and a cooling assembly. The rack has a base, a stand and a support seat arranged on the base. The barrel is arranged on the support seat, and the tail end of the barrel is movably connected with an extruder head. The first screw and the second screw are arranged in the barrel and are in meshing and coaxial relationship. The first screw and the second screw are driven by a driving assembly and a power distribution box arranged at the head end of the barrel. The power distribution box is fixedly connected with the stand. The heating assembly comprises a heat-conducting lining, a medium flow channel, a pipeline electric heater, a first water pipe and a second water pipe. The heat-conducting lining is arranged in the barrel and is in close contact with the inner wall of the barrel. The medium flow channel is arranged between the heat-conducting lining and the inner wall of the barrel. The medium flow channel is spirally distributed along the axis of the barrel. The head end and the tail end of the medium flow channel are respectively provided with a water inlet and a water outlet which penetrate into the bottom end of the barrel. The pipeline electric heater is arranged at the bottom of the inner cavity of the support seat. The first water pipe is connected with the water outlet of the pipeline electric heater and the water inlet of the bottom end of the barrel. The second water pipe is connected with the water inlet of the pipeline electric heater and the water outlet of the bottom end of the barrel.

[0006] Preferably, the pipe electric heater is arranged below the first end of the barrel, and the water inlet of the medium flow channel is close to the first end of the barrel; the second water pipe is fixed to the top of the inner cavity of the support seat by a saddle clamp.

[0007] Preferably, the cooling assembly comprises a cooling flow channel, a first water pump, a rotary joint, a water inlet tee joint and a water inlet pipe; the cooling flow channel is arranged inside the first screw rod and the second screw rod respectively; the first water pump is arranged below the power distribution box and fixed to the base; the rotary joint has two and is arranged at the first end of the first screw rod and the second screw rod respectively; the water inlet tee joint is arranged inside the power distribution box, and the water inlet tee joint is communicated with the two rotary joints by water pipes respectively; one end of the water inlet pipe is communicated with the first water pump, and the other end of the water inlet pipe is communicated with the water inlet tee joint.

[0008] Preferably, the rotary joint is a bidirectional structure, and the first water pump is a circulating water pump; the power distribution box further comprises a water outlet tee joint, which is communicated with the two rotary joints by water pipes respectively; the circulating water pump is further communicated with a water outlet pipe, and the other end of the water outlet pipe is communicated with the water outlet tee joint.

[0009] Preferably, the driving assembly comprises bevel gears; the bevel gears have two and are sleeved at the first end of the first screw rod and the second screw rod respectively, and the two bevel gears are meshed with each other.

[0010] Preferably, the driving assembly further comprises a first motor, a first pulley and a second pulley; the first motor is arranged below the power distribution box and fixed to the base; the first pulley is arranged on the output shaft of the first motor; the second pulley is arranged on the first end of the first screw rod; a first synchronous belt is rotatably arranged between the first pulley and the second pulley, and the first synchronous belt passes through the bottom end of the power distribution box.

[0011] Preferably, the first screw rod and the second screw rod are sleeved with first bearings at the first end of the power distribution box; a bottom platform is arranged on the side close to the barrel in the inner cavity of the power distribution box, and the bottom platform is provided with a groove for accommodating the first bearing; the power distribution box further comprises a pressing block abutting against the bottom platform, and the bottom end of the pressing block is also provided with a groove for accommodating the first bearing.

[0012] Preferably, the two sides of the pressing block are provided with first sliding grooves, and the sliding direction of the first sliding grooves is perpendicular to the horizontal plane; the two sides of the inner cavity of the power distribution box are provided with first sliding rails matched with the first sliding grooves.

[0013] Preferably, the top end of the power distribution box is provided with an inspection cover, the two sides of the inspection cover are provided with second sliding rails, and the sliding direction of the second sliding rails is parallel to the horizontal plane; the inner cavity of the power distribution box is provided with second sliding grooves matched with the second sliding rails.

[0014] Preferably, the power distribution box top end is away from the side of the barrel is provided with a stepped groove; the maintenance cover is provided with a bottom plate matched with the stepped groove; the stepped groove and the bottom plate are detachably fixedly connected.

[0015] The present application has the following advantages over the prior art:

[0016] 1、The present application sets the medium flow channel inside the barrel, and makes the heating medium circulate inside the medium flow channel, so as to quickly control the temperature inside the barrel, and comprehensively heat the rubber material.

[0017] 2、The present application directly passes the cold water into the screw, and then takes away the excess heat inside the barrel when the screw extrudes the rubber material, so as to control the temperature inside the barrel within a proper range. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a three-dimensional schematic view of a high-efficiency energy-saving rubber double-screw extruder Figure 1 .

[0019] Figure 2 It is a three-dimensional schematic view of a high-efficiency energy-saving rubber double-screw extruder Figure 2 .

[0020] Figure 3 It is a rear view of a high-efficiency energy-saving rubber double-screw extruder.

[0021] Figure 4 It is Figure 3 a partial enlarged view of A in FIG.

[0022] Figure 5 It is a partial structure diagram of the inner wall of the barrel.

[0023] Figure 6 It is a top view of a high-efficiency energy-saving rubber double-screw extruder.

[0024] Figure 7 It is a partial structure diagram of the cooling assembly and the driving assembly Figure 1 .

[0025] Figure 8 It is a partial structure diagram of the cooling assembly and the driving assembly Figure 2 .

[0026] Figure 9 It is a three-dimensional schematic view of a power distribution box.

[0027] Figure 10 It is an exploded view of the power distribution box.

[0028] The figure marks are: 1-frame; 11-base; 12-column; 13-support seat; 2-barrel; 21-power distribution box; 211-first bearing; 212-press block; 2121-first sliding slot; 213-first sliding rail; 214-maintenance cover; 2141-second sliding rail; 2142-bottom plate; 215-second sliding slot; 22-extruder head; 23-first screw; 24-second screw; 25-driving assembly; 251-bevel gear; 252-first motor; 253-first pulley; 254-second pulley; 255-first synchronous belt; 3-heating assembly; 31-heat-conducting lining; 32-medium flow channel; 33-pipe electric heater; 34-first water pipe; 35-second water pipe; 36-horse riding clamp; 4-cooling assembly; 41-cooling flow channel; 42-first water pump; 43-rotary joint; 44-water inlet tee; 45-water inlet pipe; 46-water outlet tee; 47-water outlet pipe. DETAILED DESCRIPTION

[0029] In order to further understand the features, technical means and specific purposes and functions achieved by the present application, the present application will be described in further detail below in conjunction with the drawings and specific embodiments.

[0030] Reference Figure 1 Figure 6 As shown in the figure, the present application provides: a high-efficiency energy-saving rubber double-screw extruder, comprising a frame 1, a barrel 2, a heating assembly 3 and a cooling assembly 4, the frame 1 has a base 11 and a column 12 and a support seat 13 arranged on the base 11, the barrel 2 is arranged on the support seat 13 and the tail end of the barrel 2 is movably connected with an extruder head 22, the inside of the barrel 2 is provided with a first screw 23 and a second screw 24 which are intermeshed and have intersecting shafts, the first end of the barrel 2 is provided with a driving assembly 25 and a power distribution box 21 for driving the first screw 23 and the second screw 24 to rotate, and the power distribution box 21 is fixedly connected with the column 12; the heating assembly 3 comprises a heat-conducting lining 31, a medium flow channel 32, a pipe electric heater 33, a first water pipe 34 and a second water pipe 35; the heat-conducting lining 31 is arranged inside the barrel 2 and is in close contact with the inner wall of the barrel 2; the medium flow channel 32 is arranged between the heat-conducting lining 31 and the inner wall of the barrel 2, the medium flow channel 32 is spirally distributed along the axis of the barrel 2, the first end and the tail end of the medium flow channel 32 are respectively provided with a water inlet and a water outlet which penetrate to the bottom end of the barrel 2; the pipe electric heater 33 is arranged at the bottom of the inner cavity of the support seat 13; the first water pipe 34 is connected with the water outlet of the pipe electric heater 33 and the water inlet at the bottom end of the barrel 2 respectively; the second water pipe 35 is connected with the water inlet of the pipe electric heater 33 and the water outlet at the bottom end of the barrel 2 respectively.

[0031] ​The top end of the machine cylinder 2 is provided with an inlet, which is designed as an opening to facilitate the rubber material from the internal mixer to fall into the machine cylinder 2 through the inlet by its own gravity, so as to reach between the first screw 23 and the second screw 24, and then realize rapid feeding; the first screw 23 and the second screw 24 are both conical screws and are designed with large lead, so as to realize a large amount of rubber feeding, follow the forming rhythm of the internal mixer, improve the production capacity, and at the same time, the screw thread on the screw is designed with variable depth and pitch, so that when the rubber material is pushed from the large end of the screw to the small end, the compression ratio generated can ensure the density of the rubber material; when the extruder processes rubber material which is sensitive to forming temperature, the temperature inside the machine cylinder 2 cannot be too high, otherwise it will affect the mixing quality, and in a more serious case, it will cause the rubber to burn, etc. Therefore, in order to better control the temperature, a medium flow channel 32 is arranged on the inner wall of the machine cylinder 2, and the medium flow channel 32 is spirally distributed along the axis of the machine cylinder 2, and a heat-conducting lining 31 is further arranged inside the machine cylinder 2, so that when the heating medium passes through the medium flow channel 32, the heat can be quickly exchanged out, so as to heat the inside of the machine cylinder 2 faster. The pipe electric heater 33 is arranged at the bottom of the inner cavity of the support seat 13, and is connected with the water inlet and the water outlet of the medium flow channel 32 through the first water pipe 34 and the second water pipe 35, so as to circulate the heating medium inside the medium flow channel 32 and control the temperature of the heating medium in real time. In order to cooperate with the heating assembly 3 arranged in the machine cylinder 2, the cooling assembly 4 is arranged inside the first screw 23 and the second screw 24, so as to take away the excess heat when the first screw 23 and the second screw 24 rotate, so as to control the temperature of the rubber material in a suitable range, and then ensure the quality of the finally formed rubber; the heating medium can be water which is relatively easy to obtain, so as to reduce the use cost.

[0032] Referring to Figure 4 The pipe electric heater 33 is arranged below the first end of the machine cylinder 2, and the water inlet of the medium flow channel 32 is close to the first end of the machine cylinder 2; the second water pipe 35 is fixed on the top end of the inner cavity of the support seat 13 through the horse clamp 36.

[0033] The pipe electric heater 33 is arranged below the first end of the cylinder 2, and the water inlet of the medium flow channel 32 is close to the first end of the cylinder 2, so that the second water pipe 35 for connecting the water inlet of the pipe electric heater 33 and the water outlet of the medium flow channel 32 has a long length, so as to avoid that the second water pipe 35 is suspended in the support seat 13, affects the appearance of the equipment, and the second water pipe 35 can be separated due to the influence of gravity for a long time, so as to cause the leakage of the heating medium, and further cause damage to the equipment or surrounding workers, so the horse clamp 36 is used to fix the second water pipe 35 at the top of the inner cavity of the support seat 13, so as to increase the appearance of the equipment, and effectively prevent the separation of the second water pipe 35. The first water pipe 34 and the second water pipe 35 are filled with high-temperature heating medium, so that the first water pipe 34 and the second water pipe 35 should be made of high-temperature resistant material.

[0034] Referring to Figure 6 and Figure 7 As shown in the figure: the cooling assembly 4 comprises a cooling flow channel 41, a first water pump 42, a rotary joint 43, a water inlet three-way pipe 44 and a water inlet pipe 45; the cooling flow channel 41 is arranged in the first screw 23 and the second screw 24 respectively; the first water pump 42 is arranged below the power distribution box 21 and fixed on the base 11; the rotary joint 43 has two and is arranged at the first end of the first screw 23 and the second screw 24 respectively; the water inlet three-way pipe 44 is arranged in the power distribution box 21, and the water inlet three-way pipe 44 is communicated with the two rotary joints 43 through water pipes respectively; one end of the water inlet pipe 45 is communicated with the first water pump 42, and the other end of the water inlet pipe 45 is communicated with the water inlet three-way pipe 44.

[0035] When the pipe electric heater 33 starts to circulate and transport the heating medium in the medium flow channel 32 in the cylinder 2, the first water pump 42 also starts to work, and then transports the cold water through the water inlet pipe 45, when the cold water passes through the water inlet three-way pipe 44, the cold water is divided into the rotary joints 43 on the first screw 23 and the second screw 24 through the water pipes (not shown in the figure), and then enters the cooling flow channels 41 in the first screw 23 and the second screw 24 respectively, so as to absorb the excess heat in the cylinder 2, so as to ensure that the temperature in the cylinder 2 is within a suitable range.

[0036] Referring to Figure 7 The rotary joint 43 is a bidirectional structure, and the first water pump 42 is a circulating water pump; the power distribution box 21 further comprises a water outlet three-way pipe 46, which is communicated with the two rotary joints 43 through water pipes respectively; the circulating water pump is further communicated with a water outlet pipe 47, and the other end of the water outlet pipe 47 is communicated with the water outlet three-way pipe 46.

[0037] The rotary joint 43 is a bidirectional structure, so that the first water pump 42 can deliver cold water to the interiors of the first screw 23 and the second screw 24 through the water inlet pipe 45, and after the cold water absorbs the heat in the interior of the barrel 2, the cold water can be discharged through the rotary joint 43, and the discharged hot water returns to the first water pump 42 through the water outlet pipe 47, so that the hot water can be delivered to the interiors of the first screw 23 and the second screw 24 through the water inlet pipe 45 after being cooled. At this time, a cooling device can be installed on the base 11 or outside the equipment, so as to quickly cool the hot water returning to the first water pump 42, so that the first water pump 42 can continuously deliver cold water to the interiors of the first screw 23 and the second screw 24, thereby ensuring that the temperature in the interior of the barrel 2 is within a suitable range, thereby ensuring the quality of the rubber molding.

[0038] Referring to Figure 8 As shown: the drive assembly 25 includes a bevel gear 251; the bevel gear 251 has two and is respectively sleeved on the first end of the first screw 23 and the second screw 24, and the two bevel gears 251 are meshed with each other.

[0039] Since the first screw 23 and the second screw 24 are meshed with each other and the shafts intersect, in order to ensure the same speed rotation between the first screw 23 and the second screw 24, the first screw 23 and the second screw 24 are both sleeved with a bevel gear 251, so that the first screw 23 and the second screw 24 can rotate at the same speed and relatively under the drive of the drive assembly 25. At the same time, due to the meshing movement between the first screw 23 and the second screw 24, the shearing, extruding and folding of the rubber material and the forward pushing effect are also increased, without repeated extrusion, thereby improving the sheet output speed, reducing the manual operation steps, and greatly reducing the labor intensity of workers; at the same time, the meshing movement of the first screw 23 and the second screw 24 effectively improves the self-cleaning property of the screw.

[0040] Referring to Figure 8 As shown: the drive assembly 25 further includes a first motor 252, a first pulley 253 and a second pulley 254; the first motor 252 is arranged below the power distribution box 21 and fixed on the base 11; the first pulley 253 is arranged on the output shaft of the first motor 252; the second pulley 254 is arranged on the first end of the first screw 23; a first synchronous belt 255 is rotatably installed between the first pulley 253 and the second pulley 254, and the first synchronous belt 255 passes through the bottom end of the power distribution box 21.

[0041] When the rubber material enters the inside of the cylinder 2 from the feeding port of the cylinder 2, the first motor 252 starts to work, so as to rotate the first pulley 253, and then the first pulley 253 drives the second pulley 254 to rotate synchronously through the first synchronous belt 255, so as to rotate the first screw rod 23, and since the first screw rod 23 and the second screw rod 24 are driven through the bevel gear 251, when the first screw rod 23 rotates, the second screw rod 24 rotates synchronously and oppositely with the first screw rod 23, so as to shear, extrude, fold and push the rubber material entering the inside of the cylinder 2, until the rubber material moves to the tail end of the cylinder 2 and is extruded from the extruder head 22, so as to completely shape the rubber.

[0042] Referring to Figure 9 and Figure 10 It is shown that the first screw rod 23 and the second screw rod 24 are sleeved with the first bearing 211 at the head end of the power distribution box 21; the bottom platform is arranged on the side of the inside cavity of the power distribution box 21 close to the cylinder 2, and the recess for accommodating the first bearing 211 is arranged on the bottom platform; the pressing block 212 abutting against the bottom platform is further arranged in the inside of the power distribution box 21, and the recess for accommodating the first bearing 211 is also arranged at the bottom end of the pressing block 212.

[0043] The first screw rod 23 and the second screw rod 24 are sleeved with the first bearing 211 at the head end, and the first bearing 211 is a thrust self-aligning roller bearing, so as to bear the axial force of the first screw rod 23 and the second screw rod 24 during extrusion, and the recess for accommodating the first bearing 211 is arranged on the bottom platform and the pressing block 212, so that after the first bearing 211 is sleeved on the first screw rod 23 and the second screw rod 24, the first bearing 211 can be moved into the recess on the bottom platform, so as to limit the displacement of the first bearing 211, and then the pressing block 212 is placed on the bottom platform, and the first bearing 211 is arranged in the recess of the pressing block 212, so that the first bearing 211 can stably bear the axial force of the first screw rod 23 and the second screw rod 24 during extrusion under the cooperation of the pressing block 212 and the bottom platform.

[0044] Referring to Figure 10 It is shown that the first sliding groove 2121 is arranged on the two sides of the pressing block 212, and the sliding direction of the first sliding groove 2121 is perpendicular to the horizontal plane; the first sliding rail 213 cooperated with the first sliding groove 2121 is arranged on the two sides of the inside cavity of the power distribution box 21.

[0045] The pressing block 212 is abutted on the base by the sliding fit of the first sliding groove 2121 and the first sliding rail 213, and is limited to the first bearing 211 by the first sliding groove 2121 and the first sliding rail 213 and the gravity of the pressing block 212, so that the first bearing 211 can not bear the axial force when the first screw rod 23 and the second screw rod 24 are extruded, and the pressing block 212 is disassembled by the first sliding groove 2121 and the first sliding rail 213, so that the pressing block 212 can be quickly removed when the first bearing 211 needs to be maintained and repaired, and then the first bearing 211 is maintained and repaired, so that the working time is reduced and the working efficiency is improved.

[0046] Referring to Figure 10 As shown in the figure: the top end of the power distribution box 21 is provided with a maintenance cover 214, both sides of the maintenance cover 214 are provided with a second sliding rail 2141, and the sliding direction of the second sliding rail 2141 is parallel to the horizontal plane; the inner cavity of the power distribution box 21 is provided with a second sliding groove 215 matched with the second sliding rail 2141.

[0047] After the pressing block 212 is abutted on the base by the first sliding rail 213 and the first sliding groove 2121, the maintenance cover 214 can be inserted into the power distribution box 21 from one side of the power distribution box 21 by the sliding fit of the second sliding rail 2141 and the second sliding groove 215, and when the maintenance cover 214 is completely inserted into the power distribution box 21, the bottom end of the maintenance cover 214 is abutted with the top end of the pressing block 212, so as to further limit the displacement of the pressing block 212, so as to avoid that the mechanical vibration generated during the operation of the equipment causes the pressing block 212 to be separated from the base, and then causes the first bearing 211 to be separated and causes the equipment to be unable to operate normally; the maintenance cover 214 can be provided with an observation window, so as to facilitate the maintenance personnel to observe the engagement between the bevel gears 251 and the use of the synchronous belt.

[0048] Referring to Figure 10 As shown in the figure: the top end of the power distribution box 21 is provided with a step groove away from one side of the machine barrel 2; the maintenance cover 214 is provided with a bottom plate 2142 matched with the step groove; the step groove and the bottom plate 2142 are detachably connected.

[0049] The maintenance cover 214 is inserted into the power distribution box 21 through the second sliding groove 215 and the second sliding rail 2141, so that the mechanical vibration generated during the operation of the equipment can cause the maintenance cover 214 to gradually separate from the power distribution box 21. Therefore, in order to avoid the separation of the maintenance cover 214, a stepped groove is arranged on the side of the power distribution box 21 away from the barrel 2, and a bottom plate 2142 is arranged on the side of the maintenance cover 214 inserted into the power distribution box 21. When the maintenance cover 214 is inserted into the power distribution box 21 and the bottom plate 2142 is inserted into the stepped groove, the bottom plate 2142 and the stepped groove are detachably connected through the threaded cooperation of the bolt screw hole, so as to limit the relative position between the maintenance cover 214 and the power distribution box 21, thereby avoiding the separation of the maintenance cover 214 caused by the mechanical vibration generated during the operation of the equipment.

[0050] The above embodiments only express one or several embodiments of the present application, and the description is more specific and detailed, but it cannot be understood as the limitation of the scope of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A high-efficiency energy-saving rubber double-screw extruder, comprising a frame (1), a barrel (2), a heating assembly (3) and a cooling assembly (4), the frame (1) having a base (11), a stand (12) and a support seat (13) arranged on the base (11), the barrel (2) being arranged on the support seat (13) and having an extruder head (22) movably connected to a tail end of the barrel (2), the barrel (2) being internally provided with a first screw (23) and a second screw (24) which are intermeshed and have intersecting shafts, a head end of the barrel (2) being provided with a driving assembly (25) and a power distribution box (21) for driving the first screw (23) and the second screw (24) to rotate, the power distribution box (21) being fixedly connected with the stand (12); characterized in that the heating assembly (3) comprising a heat-conducting lining (31), a medium flow channel (32), a pipeline electric heater (33), a first water pipe (34) and a second water pipe (35); the heat-conducting lining (31) being arranged in the barrel (2) and being in close contact with an inner wall of the barrel (2); the medium flow channel (32) being arranged between the heat-conducting lining (31) and the inner wall of the barrel (2), the medium flow channel (32) being helically distributed along an axis of the barrel (2), a head end and a tail end of the medium flow channel (32) being respectively provided with a water inlet and a water outlet which penetrate to a bottom end of the barrel (2); the pipeline electric heater (33) being arranged at the bottom of an inner cavity of the support seat (13); the first water pipe (34) being connected with the water outlet of the pipeline electric heater (33) and the water inlet of the bottom end of the barrel (2) respectively; the second water pipe (35) being connected with the water inlet of the pipeline electric heater (33) and the water outlet of the bottom end of the barrel (2) respectively; the cooling assembly (4) comprising a cooling flow channel (41), a first water pump (42), a rotary joint (43), a water inlet tee joint (44) and a water inlet pipe (45); the cooling flow channel (41) being arranged in the first screw (23) and the second screw (24) respectively; the first water pump (42) being arranged below the power distribution box (21) and being fixed on the base (11); the rotary joint (43) having two and being arranged at the head ends of the first screw (23) and the second screw (24) respectively; the water inlet tee joint (44) being arranged in the power distribution box (21), the water inlet tee joint (44) being communicated with the two rotary joints (43) through water pipes respectively; one end of the water inlet pipe (45) being communicated with the first water pump (42), the other end of the water inlet pipe (45) being communicated with the water inlet tee joint (44); the rotary joint (43) being a bidirectional structure, and the first water pump (42) being a circulating water pump; the power distribution box (21) further being provided with a water outlet tee joint (46) which is communicated with the two rotary joints (43) through water pipes respectively; the circulating water pump further being communicated with a water outlet pipe (47), the other end of the water outlet pipe (47) being communicated with the water outlet tee joint (46).

2. The high energy efficient rubber twin screw extruder as claimed in claim 1, wherein, the pipeline electric heater (33) being arranged below the head end of the barrel (2), the water inlet of the medium flow channel (32) being close to the head end of the barrel (2); the second water pipe (35) being fixed at the top end of the inner cavity of the support seat (13) through a saddle clamp (36).

3. The high energy efficient rubber twin screw extruder as claimed in claim 1, wherein, The driving assembly (25) comprises bevel gears (251); The bevel gears (251) are provided on the first ends of the first screw rod (23) and the second screw rod (24) respectively and are engaged with each other.

4. The energy efficient rubber twin screw extruder as claimed in claim 3, wherein, The driving assembly (25) further comprises a first motor (252), a first pulley (253) and a second pulley (254); The first motor (252) is arranged below the power distribution box (21) and is fixed on the base (11); The first pulley (253) is arranged on the output shaft of the first motor (252); The second pulley (254) is arranged on the first end of the first screw rod (23); The first pulley (253) and the second pulley (254) are rotatably connected with a first synchronous belt (255), and the first synchronous belt (255) passes through the bottom end of the power distribution box (21).

5. The energy efficient rubber twin screw extruder as claimed in claim 4, wherein, The first screw rod (23) and the second screw rod (24) are sleeved with first bearings (211) at the first ends thereof which extend into the power distribution box (21); A bottom platform is arranged on the side of the inner cavity of the power distribution box (21) which is close to the machine barrel (2), and the bottom platform is provided with a recess for accommodating the first bearing (211); The power distribution box (21) is further provided with a pressing block (212) which abuts against the bottom platform, and the bottom end of the pressing block (212) is also provided with a recess for accommodating the first bearing (211).

6. The energy efficient rubber twin screw extruder as claimed in claim 5, wherein, First sliding grooves (2121) are arranged on both sides of the pressing block (212), and the sliding direction of the first sliding grooves (2121) is perpendicular to the horizontal plane; First sliding rails (213) are arranged on both sides of the inner cavity of the power distribution box (21) and are matched with the first sliding grooves (2121).

7. The energy efficient rubber twin screw extruder as claimed in claim 6, wherein, A maintenance cover (214) is arranged on the top end of the power distribution box (21), and second sliding rails (2141) are arranged on both sides of the maintenance cover (214) and the sliding direction of the second sliding rails (2141) is parallel to the horizontal plane; Second sliding grooves (215) are arranged in the inner cavity of the power distribution box (21) and are matched with the second sliding rails (2141).

8. The energy efficient rubber twin screw extruder as claimed in claim 7, wherein, A stepped groove is arranged on the side of the top end of the power distribution box (21) which is away from the machine barrel (2); A bottom plate (2142) is arranged on the maintenance cover (214) and is matched with the stepped groove; The stepped groove and the bottom plate (2142) are detachably connected.

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