Raw material premixing device

Abstract

The utility model relates to the technical field of batch-type discontinuous mechanical mixing or kneading devices, in particular to a raw material premixing device. The raw material premixing device comprises a bottom base plate, a support is fixed to the bottom base plate, a motor is fixedly installed on the support, an output shaft of the motor is connected with a fixing device, the fixing device is used for fixing a material barrel, the motor is used for driving the fixing device to turn over, the fixing device comprises a bottom plate, and a vibration module is installed on the lower surface of the bottom plate. A rotary electric connector is installed on an output shaft of the motor and connected with the support, one end of the rotary electric connector is connected with the vibration module through a wire, and the other end of the rotary electric connector is used for being connected with a power line. The raw material premixing device disclosed by the utility model can be used for gradually crushing caked sediments into small blocks, and can be matched with the overturning of the charging basket, so that the uniform mixing of the raw materials and the sediments in the charging basket can be accelerated, the waste of the raw materials is avoided, the production efficiency of insulating parts can be improved, and the quality of the manufactured insulating parts is also guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to batch type, non -continuous mechanical mixing or blending device technical field, especially raw material premixing device. BACKGROUND

[0002] As a kind of thermosetting resin, epoxy resin has the characteristics of high insulation, high bearing capacity, good sealing performance, etc., and is widely used in high and low voltage electrical apparatus, motor, electronic components and GIS and other power equipment insulation layer packaging, currently usually using the mixed liquid of epoxy resin and filler and the mixed liquid of filler and curing agent as the production raw material of insulating part, the manufacturer of raw material will add filler to epoxy resin and curing agent according to proportion respectively, then two raw materials are packaged in material barrel respectively, when preparing insulating part, the production factory of insulating part needs to pour the two raw materials purchased simultaneously into stirring device for stirring, and vacuum casting technology is used to pour forming of insulating part, vacuum casting can discharge air bubble in raw material in time and can make the quality of prepared insulating part greatly improved, promote the development of power transmission technology. The process flow of vacuum casting mainly includes material pretreatment, material premixing, pre-curing, demolding and molding, curing, post-processing and inspection packaging, when pre-mixing two raw materials, due to the density difference between filler and epoxy resin and curing agent, filler is easy to deposit at the bottom of material barrel, in turn, raw material in material barrel forms stratification, as raw material is generally purchased in batches and stored in warehouse, the sediment in part of material barrel is easy to produce agglomeration after long time standing, and the sediment after agglomeration is difficult to pour out and stick to the bottom of material barrel, causing waste of raw material and uneven composition of raw material, even manually removed, a part of raw material will be wasted, and seriously affect production efficiency.

[0003] To solve the above problems, the Chinese utility model patent with the publication number CN207307739U and the publication date of May 4, 2018 discloses a raw material mixing device, which comprises a base, a support and a barrel fastening frame. The barrel fastening frame is used for fixing the barrel. The support is fixedly installed on the base. The support is fixedly connected with a motor. The motor shaft is rotatably connected with the barrel fastening frame through a bearing. The barrel fastening frame comprises a left baffle and a right baffle. The left baffle and the right baffle are connected with an upper baffle and a lower baffle respectively. The left baffle and the right baffle are further connected with a fixed curved plate and a movable fastening clamping plate. The fixed curved plate and the movable fastening clamping plate are arranged on the two sides of the left baffle and the right baffle and enclose a circular clamping space. The two ends of the fixed curved plate are fixedly connected with the left baffle and the right baffle and are located on the same side of the upper baffle and the lower baffle. The movable fastening clamping plate comprises two movable curved plates connected through a locking piece. The two movable curved plates are hingedly connected with the left baffle and the right baffle respectively. When the barrel needs to be placed, the locking piece is disassembled and the two movable curved plates are turned in the direction away from each other. After the barrel is placed in the clamping space, the movable curved plates are reset and inserted into the locking piece again to fix the barrel. Then the motor is turned on. The motor shaft drives the barrel fastening frame to rotate to mix the raw materials in the barrel.

[0004] The above scheme mixes the layered raw materials in the barrel by turning over the barrel. However, the mixing effect is good only for the raw materials without agglomerated precipitates at the bottom of the barrel. For the agglomerated precipitates adhered to the bottom of the barrel, the mixing of the agglomerated precipitates adhered to the bottom of the barrel and the raw materials cannot be realized by repeatedly turning over the barrel, or a long time is needed for the motor to drive the barrel to turn over to realize the complete mixing of the raw materials. The mixing effect of the raw materials which have been placed for a long time and the bottom precipitates have formed agglomerates is not ideal, which seriously affects the production efficiency of the insulating parts. Utility model content

[0005] The utility model discloses a raw material premixing device, which aims to solve the problem that the mixing of the agglomerated precipitates adhered to the bottom of the barrel and the raw materials cannot be realized, and the production efficiency of the insulating parts is affected.

[0006] To achieve the above object, the raw material premixing device adopts the following technical scheme:

[0007] The raw material premixing device comprises a bottom base plate. A support is fixed on the bottom base plate. A motor is fixedly installed on the support. The output shaft of the motor is connected with a fixing device. The fixing device is used for fixing a barrel. The motor is used for driving the fixing device to turn over. The fixing device comprises a bottom plate. A vibration module is installed on the lower surface of the bottom plate. A rotary electrical connector is installed on the output shaft of the motor. The rotary electrical connector is connected with the support. One end of the rotary electrical connector is connected with the vibration module through a wire. The other end of the rotary electrical connector is used for connecting with a power line.

[0008] Further, the fixing device further comprises a locking assembly and a clamping assembly, the locking assembly comprises a driving turnover flap and a movable telescopic flap, the driving turnover flap and the movable telescopic flap are in butt joint with each other to form a placing space for placing the material barrel, and the driving turnover flap is connected with the movable telescopic flap through a threaded fastener.

[0009] Further, the driving turnover flap is fixed with the output shaft of the motor through a connecting rod, the movable telescopic flap is connected with an electric telescopic rod for controlling the telescopic movement of the movable telescopic flap towards or away from the driving turnover flap, the bottom base plate is provided with a heat preservation box for enclosing the fixing device inside, and the electric telescopic rod is rotationally connected to the inner wall of the heat preservation box.

[0010] Further, the clamping assembly comprises two oppositely arranged clamping rods, the driving turnover flap and the movable telescopic flap are respectively provided with clamping grooves, and the lower ends of the two clamping rods are fixedly clamped in the corresponding clamping grooves, and the upper ends of the two clamping rods are used for limiting the upper surface of the material barrel.

[0011] Further, the driving turnover flap is fixedly connected with the bottom plate through a connecting plate, and the bottom plate is turned over when the output shaft of the motor drives the driving turnover flap to turn over.

[0012] Further, the heat preservation box comprises a rectangular frame body with one side opening, the rectangular frame body is fixedly installed on the bottom base plate and a door plate is detachably installed at the opening, and a visible glass is installed on the door plate.

[0013] Further, the heat preservation box further comprises a top plate which is detachably installed above the rectangular frame body, and the top plate, the door plate, the bottom base plate and the rectangular frame body jointly form a closed heat preservation box.

[0014] Further, a temperature control device is installed in the heat preservation box, the temperature control device comprises a heating plate installed in the heat preservation box, a control panel is installed on the outer wall of the heat preservation box, and the control panel is used for controlling the working of the heating plate.

[0015] Further, the electric telescopic rod is fixed on the side wall of the rectangular frame body and the central axis thereof coincides with the central axes of the connecting rod and the output shaft of the motor, and the connecting rod is fixedly connected with the driving turnover flap after penetrating through the other side wall of the rectangular frame body which is opposite to the side wall connected with the electric telescopic rod.

[0016] Further, a handle is arranged on the rectangular frame body, universal wheels are connected below the bottom base plate, and the handle is used for pulling the bottom base plate to move.

[0017] Beneficial effects: the raw material premixing device is an improved invention. The motor is fixedly installed on the support, a certain distance is formed between the motor and the bottom base plate, space is provided for the overturning of the material bucket, the output shaft of the motor is connected with the fixing device, the motor can drive the fixing device to rotate, the material bucket fixed by the fixing device is overturned, the raw materials in the material bucket are uniformly mixed, the lower surface of the bottom plate of the fixing device is provided with a vibration module, the vibration module is powered through the rotary electrical connector, the vibration module can vibrate the agglomerated precipitates at the bottom of the material bucket, the agglomerated precipitates are gradually broken into small pieces, the overturning of the material bucket is matched, the uniform mixing of the raw materials and the precipitates in the material bucket is accelerated, the waste of the raw materials is avoided, the production efficiency of the insulating parts is improved, and the quality of the prepared insulating parts is also guaranteed. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 It is a structure schematic view of an embodiment of the raw material premixing device of the utility model;

[0019] Fig. 2 It is a main view structure schematic view of an embodiment of the raw material premixing device of the utility model after removing the door plate;

[0020] Fig. 3 It is a top view structure schematic view of an embodiment of the raw material premixing device of the utility model after removing the top plate.

[0021] In the drawing: 1, bottom base plate; 2, support; 3, motor; 4, material bucket; 5, bottom plate; 6, vibration module; 7, locking assembly; 8, clamping assembly; 9, active overturning petal; 10, movable telescopic petal; 11, placing space; 12, threaded fastener; 13, electric telescopic rod; 14, heat preservation box; 15, clamping rod; 16, rectangular frame body; 17, door plate; 18, visible glass; 19, top plate; 20, control panel; 21, handle; 22, universal wheel; 23, connecting plate; 24, rotary electrical connector; 25, wire; 26, power cord; 27, connecting rod. DETAILED DESCRIPTION

[0022] The features and performances of the utility model are further described in detail in combination with the embodiments.

[0023] In the process of preparing the insulating part, the mixed liquid of the filler and the epoxy resin and the mixed liquid of the filler and the curing agent are mixed, and the vacuum casting technology is used to prepare the insulating part. Since the raw materials purchased are stored in the warehouse, the raw materials in the barrels will produce sedimentation and caking after long time standing. Before preparing the insulating part, the raw materials need to be uniformly mixed. The prior art fixes the barrel by the movable fastening clamping plate, connects the rotating shaft of the motor with the movable fastening clamping plate, drives the movable fastening clamping plate by the rotating shaft of the motor, and then drives the barrel to rotate, so as to realize the uniform mixing of the raw materials in the barrel. However, for the case that the sediment at the bottom of the barrel is caked and adhered to the bottom of the barrel, the uniform mixing of the caked sediment and the raw materials cannot be realized by repeatedly turning over the barrel. In order to enable the caked sediment at the bottom of the barrel to be quickly uniformly mixed with the raw materials, an object capable of vibrating can be installed at the bottom of the barrel. The caked sediment at the bottom of the barrel is vibrated for a long time to break the caked sediment into small pieces. At this time, the uniform mixing of the sediment and the raw materials can be accelerated by turning over the barrel. Based on the above inventive concept, the raw material uniform mixing device is provided. The vibration module is installed below the device for fixing the barrel to vibrate and break the caked sediment adhered to the bottom of the barrel, so as to accelerate the uniform mixing speed of the sediment and the raw materials, save the raw materials, improve the production efficiency of the insulating part, and ensure the quality of the prepared insulating part.

[0024] Embodiment of the raw material premixing device of the utility model:

[0025] Refer to Figs. 1 to 3 As the basic embodiment of the utility model, the raw material premixing device comprises a bottom base plate 1, a support 2 is fixedly arranged on the bottom base plate 1, a motor 3 is fixedly installed on the support 2, a fixing device is connected to the output shaft of the motor 3, the fixing device is used to fix a barrel 4, the motor 3 is used to drive the fixing device to turn over, and then drive the barrel 4 fixed by the fixing device to turn over, so as to realize the uniform mixing of the raw materials in the barrel 4. The motor 3 is fixedly installed on the support 2, so that there is a certain distance between the motor 3 and the bottom base plate 1, which can provide space for the turning over of the barrel 4. The fixing device comprises a bottom plate 5, a vibration module 6 is installed on the lower surface of the bottom plate 5, the vibration module 6 is used to transmit the vibration generated thereby to the bottom of the barrel 4, a rotating electrical connector 24 is installed on the output shaft of the motor 3, the rotating electrical connector 24 is connected with the support 2, one end of the rotating electrical connector 24 is connected with the vibration module 6 through a wire 25, and the other end is used to be connected with a power line 26. The rotating electrical connector 24 can electrify the vibration module 6 to ensure the vibration state of the vibration module 6. When the vibration module 6 vibrates, the blocky sediment at the bottom of the barrel 4 can be vibrated to break the blocky sediment into small pieces, so as to facilitate the uniform mixing of the sediment and the raw materials. At the same time, the turning over of the barrel 4 can accelerate the uniform mixing of the raw materials and the sediment in the barrel 4, avoid the waste of the raw materials, improve the production efficiency of the insulating part, and ensure the quality of the prepared insulating part.

[0026] The vibration module 6 in the embodiment can adopt ultrasonic vibration or physical vibration, as long as the vibration impact on the material barrel 4 can be realized.

[0027] As a preferred embodiment of the utility model, the fixing device further comprises a locking assembly 7 and a clamping assembly 8, the locking assembly 7 comprises a driving turnover flap 9 and a movable telescopic flap 10, the driving turnover flap 9 and the movable telescopic flap 10 are mutually butted to form a placing space 11 for placing the material barrel 4, the driving turnover flap 9 and the movable telescopic flap 10 are connected through a threaded fastener 12, the material barrel 4 is placed in the placing space 11, the bottom plate 5 provides stable support for the material barrel 4, the threaded fastener 12 is arranged between the two ends of the driving turnover flap 9 and the movable telescopic flap 10, the material barrel 4 is locked through the threaded fastener 12, the threaded fastener 12 in the embodiment is a screw rod and a nut, the end of the screw rod is simultaneously threaded through the driving turnover flap 9 and the movable telescopic flap 10, and the nut is threadedly connected to the end of the screw rod, so that the driving turnover flap 9 and the movable telescopic flap 10 are locked, the arrangement makes the installation of the material barrel 4 more convenient, the connection mode is simple and easy to operate, and the overall production time of the insulating part can be saved.

[0028] As a preferred embodiment of the utility model, the driving turnover flap 9 is fixed with the output shaft of the motor 3 through a connecting rod 27, the movable telescopic flap 10 is connected with an electric telescopic rod 13 for controlling the telescopic movement of the movable telescopic flap 10 towards or away from the driving turnover flap 9, the bottom base plate 1 is provided with a heat preservation box 14 for enclosing the fixing device inside, the electric telescopic rod 13 is rotationally connected to the inner wall of the heat preservation box 14, that is, the position of the driving turnover flap 9 is always unchanged, only the electric telescopic rod 13 is needed to control the movement of the movable telescopic flap 10 towards or away from the driving turnover flap 9, so that the distance between the driving turnover flap 9 and the movable telescopic flap 10 can be adjusted, the arrangement can make the driving turnover flap 9 and the movable telescopic flap 10 be able to accommodate material barrels 4 of different specifications, and can also speed up the installation speed of the material barrel 4 and facilitate operation.

[0029] As a preferred embodiment of the utility model, the clamping rod 15 is fixedly clamped in the corresponding clamping groove at the lower end, and the upper end is used for limiting the upper surface of the material barrel 4. When the motor 3 drives the active turnover flap 9 to turn over, the material barrel 4 locked by the active turnover flap 9 and the movable telescopic flap 10 through the threaded fastener 12 turns over. In this process, the bottom plate 5 stops the lower end of the material barrel 4, and the clamping rod 15 stops the upper end of the material barrel 4. The bottom plate 5 and the clamping rod 15 cooperate to stop and limit the upper end and the lower end of the material barrel 4, so that the material barrel 4 is prevented from falling off from the upper end or the lower end during the turnover process.

[0030] As a preferred embodiment of the utility model, the active turnover flap 9 is fixedly connected with the bottom plate 5 through the connecting plate 23. When the output shaft of the motor 3 drives the active turnover flap 9 to turn over, the bottom plate 5 turns over. At this time, the material barrel 4 does not turn over actively, but the bottom plate 5 turns over with the active turnover flap 9 and drives the material barrel 4 to turn over. The bottom plate 5 provides stable support for the material barrel 4, so that the material barrel 4 is more stable during the turnover process with the output shaft of the motor 3.

[0031] As a preferred embodiment of the utility model, the heat preservation box 14 comprises a rectangular frame body 16 with one side open. The rectangular frame body 16 is fixedly installed on the bottom base plate 1, and the door plate 17 is detachably installed at the opening. The door plate 17 is provided with a visible glass 18. In the embodiment, the door plate 17 is installed along the vertical direction of the rectangular frame body 16, that is, a sliding groove extending along the width direction of the rectangular frame body 16 is formed on the side surface of the rectangular frame body 16. The two sides of the door plate 17 are provided with clamping blocks capable of slidingly cooperating with the sliding groove. The clamping blocks on the door plate 17 are installed in the sliding groove, and the bottom surface of the door plate 17 is in contact with the bottom base plate 1. At this time, the door plate 17 covers the opening of the rectangular frame body 16. The visible glass 18 facilitates observation of the turnover state of the material barrel 4 in the heat preservation box 14. If the material barrel 4 deviates or is misaligned during the turnover process, or other components fail, the visible glass 18 can enable the staff to discover the problem in time and solve the problem or maintain the components in time, thereby avoiding greater accidents.

[0032] As a preferred embodiment of the utility model, the heat preservation box 14 further comprises a top plate 19 detachably installed above the rectangular frame body 16. The top plate 19, the door plate 17, the bottom base plate 1 and the rectangular frame body 16 jointly constitute the closed heat preservation box 14. The installation mode of the top plate 19 is consistent with that of the door plate 17, which will not be described here again. When the material barrel 4 is installed, the door plate 17 and the top plate 19 can be removed to increase the activity space and facilitate installation of the material barrel 4. After the material barrel 4 is installed, the door plate 17 and the top plate 19 are reinstalled on the rectangular frame body 16 to form the closed heat preservation box 14, so that the material barrel 4 works in an independent and unaffected space. The heat preservation box 14 in the closed state has a protective effect on the material barrel 4.

[0033] As a preferred embodiment of the utility model, the temperature control device is installed in the heat preservation box 14, the temperature control device includes the heating plate installed in the heat preservation box, the temperature control device is prior art, and details are not repeated here, the control panel 20 is installed on the outer wall of the heat preservation box 14, and the control panel 20 is used to control the heating plate work, that is, the temperature control device is electrically connected with the control panel 20, in the process that the motor 3 drives the material bucket 4 to overturn, the heating plate starts heating by the control panel 20, the temperature in the heat preservation box 14 is kept in the temperature range higher than room temperature, the preheating of the raw materials in the material bucket can be realized, the raw materials need not be transferred to the oven or the preheating equipment to be preheated, and the raw materials can be mixed more uniformly under the action of certain temperature, the uniform mixing speed of the raw materials is improved, the time required for uniform mixing can be shortened, and the time and manpower for transferring the raw materials to other equipment are saved, the process flow is simplified, and the production efficiency is improved.

[0034] As a preferred embodiment of the utility model, the electric telescopic rod 13 is fixed on the side wall of the rectangular frame body 16 and the central axis coincides with the central axis of the output shaft of the connecting rod 27 and the motor 3, the connecting rod 27 is fixedly connected with the driving overturning lobe 9 after passing through the other side wall of the rectangular frame body 16 opposite to the side wall connected with the electric telescopic rod 13, the distance between the movable telescopic lobe 10 and the driving overturning lobe 9 is adjustable, and no matter how the distance between the movable telescopic lobe 10 and the driving overturning lobe 9 changes, the movable telescopic lobe 10 and the driving overturning lobe 9 always remain coaxial, so that when the material bucket 4 is locked, other direction extrusion deformation of the material bucket 4 can not be caused.

[0035] As a preferred embodiment of the utility model, the rectangular frame body 16 is provided with the handle 21, and the universal wheel 22 is connected below the bottom base plate 1, and the staff can pull the bottom base plate 1 to move to the specified position by exerting pulling force on the handle 21, when the material bucket 4 is installed, the worker needs to consume a lot of manpower to move the material bucket 4 to the heat preservation box 14, therefore, the whole device can be moved to the position where the material bucket 4 is located by the handle 21, and manpower is saved.

[0036] The use process of the raw material premixing device is as follows: firstly, a worker exerts pulling force on the handle 21, moves the device as a whole to the position where the barrel 4 is located, removes the top plate 19 and the door plate 17 to leave a larger installation space, then controls the electric telescopic rod 13 to make the movable telescopic flap 10 retract, moves the movable telescopic flap 10 away from the driven flap 9 to leave the placing space 11 of the barrel 4, moves the barrel 4 above the bottom plate 5 by the worker, and makes the outer circumferential surface of the barrel 4 abut against the inner wall of the driven flap 9, then controls the electric telescopic rod 13 to elongate, drives the movable telescopic flap 10 to move towards the driven flap 9, until the inner wall of the movable telescopic flap 10 abuts against the outer circumferential surface of the barrel, controls the electric telescopic rod 13 to stop elongating, at this time, the movable telescopic flap 10 and the driven flap 9 are connected through the threaded fastener 12, and the barrel 4 is locked, at this time, the door plate 17 and the top plate 19 are reinstalled into the rectangular frame body 16 to form the closed heat preservation box 14; then the power cord 26 is connected with the power source seat, the power cord 26 passes through the rotary electric connector 24 to electrify the vibration module 6, the vibration module 6 starts to vibrate and acts on the agglomerated precipitate at the bottom of the barrel 4, simultaneously, the motor 3 is started, the output shaft of the motor 3 drives the driven flap 9 to which the barrel 4 is locked to turn over, the driven flap 9 drives the movable telescopic flap 10, the bottom plate 5 and the clamping rod 15 connected with the driven flap 9 to turn over, simultaneously, the barrel 4 fixed and limited by the driven flap 9, the movable telescopic flap 10, the bottom plate 5 and the clamping rod 15 also turns over, the barrel 4 is prevented from being thrown out during the turning over process, and simultaneously, the control panel 20 controls the heating plate to start to heat, preheats the raw material in the barrel 4, the barrel 4 turns over and the vibration module 6 vibrates cooperatively, and the temperature in the heat preservation box 14 is higher than the room temperature, so that the agglomerated precipitate at the bottom of the barrel 4 is gradually broken into small pieces, finally realizes uniform mixing with the raw material, saves the process of transferring the raw material to a preheating device, and improves the production efficiency of the insulating part.

[0037] The above is only a preferred embodiment of the utility model, and does not limit the utility model, the patent protection scope of the utility model is subject to the claims, and equivalent structural changes made by referring to the contents of the specification and drawings of the utility model should also be included in the protection scope of the utility model.

Claims

1. A raw material premixing device, comprising a base plate, a support fixed on the base plate, a motor fixedly mounted on the support, an output shaft of the motor connected to a fixing device, the fixing device being used to fix a material container, and the motor being used to drive the fixing device to rotate, characterized in that: The fixing device comprises a bottom plate, a vibration module is mounted on the lower surface of the bottom plate, a rotating electrical connector is mounted on the output shaft of the motor, the rotating electrical connector is connected with the support, one end of the rotating electrical connector is connected with the vibration module through a wire, and the other end is used for being connected with a power line.

2. The raw material premixing apparatus according to claim 1, characterized by: The fixing device further comprises a locking assembly and a clamping assembly, the locking assembly comprises a driving turnover flap and a movable telescopic flap, the driving turnover flap and the movable telescopic flap are in butt joint with each other to form a placing space for placing a material bucket, and the driving turnover flap is connected with the movable telescopic flap through a threaded fastener.

3. The raw material premixing apparatus according to claim 2, characterized by: The driving turnover flap is fixed with the output shaft of the motor through a connecting rod, the movable telescopic flap is connected with an electric telescopic rod for controlling the telescopic movement of the movable telescopic flap towards or away from the driving turnover flap, a heat preservation box is arranged on the bottom base plate to enclose the fixing device, and the electric telescopic rod is rotatably connected to the inner wall of the heat preservation box.

4. The raw material premixing apparatus according to claim 2, characterized by: The clamping assembly comprises two oppositely arranged clamping rods, the driving turnover flap and the movable telescopic flap are respectively provided with clamping grooves, and the lower ends of the two clamping rods are clamped in the corresponding clamping grooves, and the upper ends are used for limiting the upper surface of the material bucket.

5. The raw material premixing device according to claim 2, characterized by: The driving turnover flap is fixedly connected with the bottom plate through a connecting plate, and the bottom plate is turned over when the output shaft of the motor drives the driving turnover flap to turn over.

6. The raw material premixing apparatus according to claim 3, characterized by: The heat preservation box comprises a rectangular frame body with an opening on one side, the rectangular frame body is fixedly mounted on the bottom base plate, a door plate is detachably mounted at the opening, and a visible glass is mounted on the door plate.

7. The raw material premixing apparatus according to claim 6, characterized by: The heat preservation box further comprises a top plate which is detachably mounted above the rectangular frame body, and the top plate, the door plate, the bottom base plate and the rectangular frame body jointly form a closed heat preservation box.

8. The raw material premixing apparatus according to claim 7, characterized by: A temperature control device is mounted in the heat preservation box, the temperature control device comprises a heating plate mounted in the heat preservation box, a control panel is mounted on the outer wall of the heat preservation box, and the control panel is used for controlling the working of the heating plate.

9. The raw material premixing device according to claim 3 or 6, characterized by: The electric telescopic rod is fixed on the side wall of the rectangular frame body, the central axis of the electric telescopic rod coincides with the central axes of the connecting rod and the output shaft of the motor, the connecting rod penetrates through the other side wall of the rectangular frame body which is opposite to the side wall connected with the electric telescopic rod, and the connecting rod is fixedly connected with the driving turnover flap.

10. The raw material premixing apparatus according to claim 7, characterized by: A handle is arranged on the rectangular frame body, universal wheels are connected to the lower surface of the bottom base plate, and the handle is used for moving the bottom base plate.

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