Single-screw extrusion equipment for single-base medicine, double-base medicine and multi-base medicine

Abstract

The invention provides single-screw extrusion equipment for single-base medicine, double-base medicine and multi-base medicine, the equipment comprises a screw shaft, a rotary water jacket, a screw shaft fixing seat, a screw cavity shell and a shell cooling structure, and the screw shaft comprises a shaft body, a sealing end cover and a cooling water pipe; spiral blades are arranged on the outer wall of one end of the shaft body, the other end of the shaft body is of an optical axis structure, a shaft body water inlet and a shaft body water outlet are formed in the optical axis structure of the other end of the shaft body, a cooling hole is formed in the end, provided with the spiral blades, of the outer wall of the shaft body in the central axis direction of the shaft body, and a pressure relief opening is formed in the screw cavity shell. The pressure relief opening is located in the end, close to the screw shaft fixing base, of the screw cavity shell. The screw shaft and the screw cavity shell are subjected to double cooling, the temperature of materials between the screw shaft and the screw cavity shell can be controlled within a proper range, the stability of the temperature of the materials between the screw shaft and the screw cavity shell during continuous work can be guaranteed, and the safety and production efficiency of equipment are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of material forming production equipment, in particular to a single-screw extrusion equipment for single-base medicine, double-base medicine and multi-base medicine. Background Art

[0002] Existing material extrusion equipment includes screw extrusion equipment and hydraulic cylinder extrusion equipment. For sensitive materials such as single-base, dual-base, and multi-base propellants, which are sensitive to temperature and pressure and prone to explosion, existing screw extrusion equipment is often used to extrude non-sensitive materials. During the extrusion process, as the screw continuously works, heat easily accumulates within the screw chamber, which can easily cause explosions and other safety hazards for sensitive materials.

[0003] The existing cold extrusion molding of single-base propellant, double-base propellant and multi-base propellant is to place the lumped gunpowder in the cartridge and squeeze it out through the cylinder. Although it can avoid the accumulation of heat in the cartridge due to continuous production, after the material in the barrel is squeezed out, it is necessary to stop the machine, remove the cylinder push rod, and re-add the material. The production efficiency is low and continuous automated production cannot be achieved. Summary of the Invention

[0004] The purpose of the present invention is to overcome the deficiencies in the above-mentioned prior art and provide a single-screw extrusion equipment for single-base medicines, double-base medicines and multi-base medicines, which can realize continuous production and improve production efficiency; at the same time, it can avoid heat accumulation in the continuous production process and improve the safety of continuous extrusion molding of sensitive materials such as single-base medicines, double-base medicines and multi-base medicines.

[0005] In order to solve the above problems, the present invention provides a single-screw extruder for single-base medicine, double-base medicine and multi-base medicine, which is characterized by comprising:

[0006] The screw shaft comprises a shaft body, a sealing end cover and a cooling water pipe, a spiral blade is provided on the outer wall of one end of the shaft body, the other end of the shaft body is an optical axis structure, a shaft water inlet and a shaft water outlet are provided on the optical axis structure at the other end of the shaft body, a cooling hole is provided on the end of the shaft outer wall where the spiral blade is provided along the central axis direction of the shaft body, the cooling hole is connected with the shaft water outlet, the cooling water pipe is arranged in the cooling hole along the central axis direction of the shaft body, one end of the cooling water pipe is fixedly connected to the shaft body, and the end of the cooling water pipe connected to the shaft body is connected with the shaft water inlet, the sealing end cover is provided at the orifice of the cooling hole, and the sealing end cover is sealed with the shaft body, and the other end of the cooling water pipe is spaced apart from the sealing end cover;

[0007] A rotating water jacket, wherein the rotating water jacket is mounted on the shaft, and the water inlet of the rotating water jacket is connected to the water inlet of the shaft, and the water outlet of the rotating water jacket is connected to the water outlet of the shaft;

[0008] A screw shaft fixing seat, the screw shaft fixing seat is sleeved on one end of the shaft body optical axis structure, and the screw shaft fixing seat is rotatably connected to the shaft body;

[0009] A screw chamber housing, the screw chamber housing is sleeved on the outer side of the spiral blade end of the shaft body, one end of the screw chamber housing is fixedly connected to the screw shaft fixing seat, and a pressure relief port is opened on the screw chamber housing, and the pressure relief port is located at one end of the screw chamber housing close to the screw shaft fixing seat;

[0010] The shell cooling structure is covered on the outside of the screw chamber shell and is used to cool the screw chamber shell.

[0011] The above-mentioned single-screw extrusion equipment for single-base drugs, double-base drugs and multi-base drugs is characterized in that the single-screw extrusion device for sensitive materials also includes a gasket, which is arranged between the screw chamber shell and the spiral blades arranged on the outer wall of the shaft.

[0012] The above-mentioned single-screw extrusion equipment for single-base medicine, double-base medicine and multi-base medicine is characterized in that the screw chamber shell includes a feeding section and a cooling section, one end of the feeding section is fixedly connected to the screw shaft fixing seat, and the other end of the feeding section is fixedly connected to the cooling section, and the shell cooling structure is covered on the outside of the cooling section.

[0013] The above-mentioned single-screw extrusion equipment for single-base drugs, double-base drugs and multi-base drugs is characterized in that the single-screw extrusion device for sensitive materials also includes a pressure sensor and a temperature sensor. The pressure sensor and temperature sensor are both arranged at one end of the cooling section away from the feeding section, and are respectively used to measure the pressure and temperature of the extruded material in the screw chamber shell in real time.

[0014] The above-mentioned single-screw extrusion equipment for single-base drugs, double-base drugs and multi-base drugs is characterized in that the single-screw extrusion device for sensitive materials further includes a mold fixing component, the mold fixing component includes a mold mounting seat and a connecting portion, the mold mounting seat is arranged at one end of the screw chamber shell away from the screw shaft fixing seat, the connecting portion is arranged at the connection between the mold mounting seat and the screw chamber shell, and the connecting portion is used to connect the mold mounting seat and the screw chamber shell together;

[0015] A mold mounting hole adapted to the corresponding mold is provided in the mold mounting seat, and a safety ring for blocking the corresponding mold is provided on the hole wall of the mold mounting hole.

[0016] The above-mentioned single-screw extrusion equipment for single-base propellant, double-base propellant and multi-base propellant is characterized in that the screw shaft fixing seat includes a fixing seat body, a thrust bearing and a copper sleeve, the fixing seat body is arranged in the optical axis section of the shaft body, the copper sleeve is installed in the fixing seat body, and the copper sleeve is located between the inner wall of the fixing seat body and the outer wall of the shaft body, the optical axis section of the shaft body is provided with a pillow block, one end of the thrust bearing acts on the pillow block, and the other end of the thrust bearing acts on the inner wall of the fixing seat body, which is used to provide the shaft body with a force along the axial direction of the shaft body.

[0017] The above-mentioned single-screw extrusion equipment for single-base drugs, double-base drugs and multi-base drugs is characterized in that the single-screw extrusion device for sensitive materials also includes a drive motor, a reducer, a torque sensor and a safety coupling. The drive motor is installed at the input end of the reducer, and the output shaft of the drive motor is connected to the input end of the reducer. The output end of the reducer is connected to one end of the torque sensor through a short shaft, and the other end of the torque sensor is connected to one end of the safety coupling through a short shaft, and the other end of the safety coupling is connected to one end of the screw shaft.

[0018] The above-mentioned single-screw extrusion equipment for single-base drugs, double-base drugs and multi-base drugs is characterized in that the single-screw extrusion device for sensitive materials also includes a double-conical screw feeding device, and the double-conical screw feeding device includes a screw driving component, a synchronous conveying twin screw, a twin screw chamber, a feeding funnel and a screw chamber discharge port. The screw driving component is connected to the synchronous conveying twin screw, and the screw driving component is used to drive the synchronous conveying twin screw to rotate. The threaded conveying section of the synchronous conveying twin screw is located in the twin screw chamber, the feeding funnel is located above the twin screw chamber, and the screw chamber discharge port is located in the axial direction of the synchronous conveying twin screw, and the screw chamber discharge port is connected to the feed port on the screw chamber shell.

[0019] The above-mentioned single-screw extrusion equipment for single-base drugs, double-base drugs and multi-base drugs is characterized in that the single-screw extrusion device for sensitive materials also includes a feeding device, and the feeding device includes a material transport trolley and a trolley lifting component. The trolley lifting component is arranged on one side of the double-conical screw feeding device, and the trolley lifting component is used to grab the material transport trolley and dump the material in the material transport trolley into the feeding funnel.

[0020] The above-mentioned single-screw extrusion equipment for single-base drugs, double-base drugs and multi-base drugs is characterized in that the single-screw extrusion device for sensitive materials also includes a molding material collecting device, and the molding material collecting device includes a belt transmission device and a material dividing device. One end of the belt transmission device is located below the mold outlet, and the other end of the belt transmission device is located above the material dividing device. The material dividing device includes a telescopic bracket and a slide. The upper end of the slide is connected to the top of the telescopic bracket, and the lower end of the slide expands in the direction away from the telescopic bracket. There are multiple slides, and the multiple slides are evenly arranged along the circumference of the telescopic bracket.

[0021] Compared with the prior art, the present invention has the following advantages:

[0022] 1. The present invention can realize continuous production and improve production efficiency; at the same time, it can avoid heat accumulation during the continuous production process and improve the safety of continuous extrusion molding of sensitive materials.

[0023] 2. The present invention can release the internal energy of the extruded material in a timely manner by cooling the screw shaft, thereby preventing energy from accumulating inside the material, causing the internal temperature of the material to rise, exceed the safety value, and cause a safety accident.

[0024] 3. The present invention provides a gasket between the screw chamber shell and the spiral blades arranged on the outer wall of the shaft body. The gasket can prevent the spiral blades from rubbing against the screw chamber shell, causing loss of the spiral blades, and safety accidents caused by sparks or heat generated by friction.

[0025] 4. The mold fixing component of the present invention is provided with mechanical protection, which limits the maximum load inside the mold by the breakage of the safety ring, thereby effectively avoiding the occurrence of safety accidents.

[0026] The invention is further described in detail below through the accompanying drawings and examples. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings, which constitute part of the present invention, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0028] Figure 1 This is a schematic diagram of the overall three-dimensional structure of a single-screw extruder for sensitive materials in an embodiment of the present invention.

[0029] Figure 2 This is a front view of a single-screw extruder for sensitive materials in an embodiment of the present invention.

[0030] Figure 3 This is a cross-sectional view of a single-screw extruder for sensitive materials in an embodiment of the present invention.

[0031] Figure 4 for Figure 3 Enlarged view of point A.

[0032] Figure 5 for Figure 3 Enlarged view of point B.

[0033] Figure 6 for Figure 3 Enlarged view of point C.

[0034] Figure 7 for Figure 3 Enlarged view of point D.

[0035] Figure 8 This is a top view of a single-screw extruder for sensitive materials in an embodiment of the present invention.

[0036] Figure 9 It is a schematic diagram of the three-dimensional structure of the twin-conical screw feeding device in an embodiment of the present invention.

[0037] Figure 10 This is a top view of a twin-conical screw feeding device in an embodiment of the present invention.

[0038] Figure 11 Schematic diagram of the three-dimensional structure of the feeding device in an embodiment of the present invention.

[0039] Figure 12 Schematic diagram of the three-dimensional structure of the molding material collecting device in an embodiment of the present invention.

[0040] Description of reference numerals:

[0041] 10—screw shaft; 11—shaft body; 12—sealing end cover;

[0042] 13—Cooling water pipe; 14—Shaft water inlet; 15—Shaft water outlet;

[0043] 16—Cooling hole; 20—Rotating water jacket; 30—Screw shaft fixing seat;

[0044] 31—fixed seat body; 32—thrust bearing; 33—copper sleeve;

[0045] 40—screw chamber housing; 41—pressure relief port; 42—feeding section;

[0046] 43—cooling section; 44—gasket; 45—shell cooling structure;

[0047] 50—mold fixing component; 51—mold mounting seat; 52—connecting part;

[0048] 511—Mold mounting hole; 512—Safety ring; 61—Pressure sensor;

[0049] 62—temperature sensor; 63—drive motor; 64—reducer;

[0050] 65—Torque sensor; 66—Safety coupling; 70—Double conical screw feeding device;

[0051] 71—screw drive component; 72—synchronous conveying twin screw; 73—twin screw cavity;

[0052] 74—feeding funnel; 75—screw cavity outlet; 80—feeding device;

[0053] 81—Material transport trolley; 82—Trolley lifting component; 90—Molding material collection device;

[0054] 91—belt transmission device; 92—material distribution device; 921—telescopic bracket;

[0055] 922—chute. DETAILED DESCRIPTION

[0056] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0057] Sensitive materials are materials that are sensitive to temperature and pressure and can achieve the desired effect through extrusion. Although they can achieve the desired effect through extrusion, due to the sensitivity of the material to pressure and temperature, the pressing process is prone to material damage and safety accidents. For example, during the extrusion molding process of gunpowder, when the pressure or temperature exceeds the safe value, it is easy to explode, causing a safety accident.

[0058] like Figures 2 to 8As shown, in this embodiment, a single-screw extrusion device for single-base drugs, double-base drugs and multi-base drugs is disclosed. The device includes a screw shaft 10, a rotating water jacket 20, a screw shaft fixing seat 30, a screw chamber shell 40 and a shell cooling structure 45. By dual cooling of the screw shaft 10 and the screw chamber shell 40, the temperature of the material between the screw shaft 10 and the screw chamber shell 40 can be controlled within a suitable range. For screw extrusion molding equipment, due to its continuous operation, the heat inside the extruded material is easily accumulated during the continuous extrusion process, and the temperature rises, causing safety accidents. The present invention can release the internal energy of the extruded material in a timely manner by cooling the screw shaft 10, avoiding the accumulation of energy inside the material, causing the internal temperature of the material to rise, exceed the safety value, and cause safety accidents. The sensitive material single-screw extrusion device in this embodiment can ensure the stability of the material temperature between the screw shaft 10 and the screw chamber shell 40 during continuous operation, thereby improving the safety and production efficiency of the equipment.

[0059] Wherein, the screw shaft 10 includes a shaft body 11, a sealing end cover 12 and a cooling water pipe 13, a spiral blade is provided on the outer wall of one end of the shaft body 11, and the other end of the shaft body 11 is an optical axis structure, and a shaft water inlet 14 and a shaft water outlet 15 are provided on the optical axis structure at the other end of the shaft body 11, and a cooling hole 16 is provided at one end of the outer wall of the shaft body 11 where the spiral blade is provided, and the cooling hole 16 is communicated with the shaft water outlet 15, and the cooling water pipe 13 is arranged in the cooling hole 16 along the central axis direction of the shaft body 11, one end of the cooling water pipe 13 is fixedly connected to the shaft body 11, and the end of the cooling water pipe 13 connected to the shaft body 11 is communicated with the shaft water inlet 14, the sealing end cover 12 is provided at the orifice of the cooling hole 16, and the sealing end cover 12 is sealed and connected to the shaft body 11, The other end of the cooling water pipe 13 is spaced apart from the sealing end cover 12; the rotating water jacket 20 is installed on the shaft body 11, and the water inlet of the rotating water jacket 20 is communicated with the shaft body water inlet 14, and the water outlet of the rotating water jacket 20 is communicated with the shaft body water outlet 15; the screw shaft fixing seat 30 is sleeved on one end of the optical axis structure of the shaft body 11, and the screw shaft fixing seat 30 is rotatably connected to the shaft body 11; the screw chamber shell 40 is sleeved on the outside of the spiral blade end of the shaft body 11, and one end of the screw chamber shell 40 is fixedly connected to the screw shaft fixing seat 30, and a pressure relief port 41 is opened on the screw chamber shell 40, and the pressure relief port 41 is located at one end of the screw chamber shell 40 close to the screw shaft fixing seat 30; the shell cooling structure 45 is covered on the outside of the screw chamber shell 40 and is used to cool the screw chamber shell 40.

[0060] like Figures 3 to 7As shown, in this embodiment, the shaft body 11 is provided with a cooling hole 16 along the central axis thereof, the cooling water pipe 13 is arranged in the cooling hole 16, the cooling hole 16 is connected to the rotating water jacket 20 arranged outside the shaft body 11 through the shaft body water outlet 15 on the shaft body 11, one end of the cooling water pipe 13 is connected to the external rotating water jacket 20 through the shaft body water inlet 14 on the shaft body 11, and the rotating water jacket 20 is rotatably sealed with the shaft body 11, so that the cooling medium can be cooled by the rotating water jacket 20. The water inlet of the sleeve 20 enters the shaft water inlet 14, then enters the cooling water pipe 13 from the shaft water inlet 14, and then flows from one end of the cooling water pipe 13 connected to the shaft water inlet 14 to the other end, and then flows out of the cooling water pipe 13, enters the channel between the inner wall of the cooling hole 16 and the outer wall of the cooling water pipe 13, and then flows from the channel to the shaft water outlet 15, flows out through the shaft water outlet 15, and then enters the water outlet of the rotating water jacket 20, thereby taking away the heat in the extruded material outside the shaft 11.

[0061] like Figure 3 As shown, the above-mentioned single-screw extruder for sensitive materials further includes a gasket 44 , which is arranged between the screw chamber housing 40 and the spiral blades arranged on the outer wall of the shaft body 11 .

[0062] In this embodiment, a gasket 44 is provided between the screw chamber housing 40 and the shaft 11. The material of the gasket 44 can be selected based on the sensitive material. The gasket 44 needs to have the characteristics of good stability and low hardness. The low hardness can effectively protect the spiral blades on the shaft 11 and prevent the spiral blades from rubbing against the screw chamber housing 40, causing loss of the spiral blades, and sparks or heat generated by friction, which may cause safety accidents. The gasket 44 in this embodiment is made of copper with good stability, low hardness, and excellent thermal conductivity. It can effectively protect the spiral blades on the shaft 11, and can also quickly transfer the heat in the material to the screw chamber housing 40, and then remove the heat through the housing cooling structure 45, thereby preventing heat accumulation and causing safety accidents.

[0063] like Figure 2 and Figure 3 As shown, the screw chamber shell 40 includes a feed section 42 and a cooling section 43. One end of the feed section 42 is fixedly connected to the screw shaft fixing seat 30, and the other end of the feed section 42 is fixedly connected to the cooling section 43. The shell cooling structure 45 is covered on the outside of the cooling section 43. A feed port is provided on the feed section 42. The material can enter the single screw chamber through the feed port and be pushed to the mold by the blades of the single screw to be extruded and formed.

[0064] In this embodiment, the housing cooling structure 4550 is provided with a water jacket on the outside of the screw chamber housing 40. That is, the cooling liquid enters from one end of the housing cooling structure 4550 and flows out from the other end. It can be carried along the outer wall of the screw chamber housing 40 to remove heat from the extruded material, thereby controlling the upper temperature limit of the extruded material.

[0065] like Figure 3 As shown, the above-mentioned single-screw extrusion device for sensitive materials also includes a pressure sensor 61 and a temperature sensor 62. The pressure sensor 61 and the temperature sensor 62 are both arranged at one end of the cooling section 43 away from the feeding section 42, and are respectively used to measure the pressure and temperature of the extruded material in the screw chamber shell 40 in real time.

[0066] The above-mentioned single-screw extrusion device for sensitive materials also includes a controller, a shell cooling structure 45 circulating water pump and a main shaft cooling circulating water pump. The temperature sensor 62 and the pressure sensor 61 are both connected to the controller and are respectively used to transmit the temperature information and pressure information collected by each to the controller. The controller adjusts the speed of the shell cooling structure 45 circulating water pump and the main shaft cooling circulating water pump according to the set value and the collected temperature and pressure value information, and then adjusts the flow rate of the coolant to achieve the purpose of controlling the material temperature.

[0067] like Figure 3 and Figure 4 As shown, the above-mentioned single-screw extrusion device for sensitive materials also includes a mold fixing component 50, which includes a mold mounting seat 51 and a connecting portion 52. The mold mounting seat 51 is arranged at one end of the screw chamber shell 40 away from the screw shaft fixing seat 30, and the connecting portion 52 is detachably arranged at the connection between the mold mounting seat 51 and the screw chamber shell 40, and the connecting portion 52 is used to connect the mold mounting seat 51 and the screw chamber shell 40 together.

[0068] like Figure 1 and Figure 2 As shown, the connecting portion 52 in this embodiment includes two main parts. The two main parts have similar structures and are both half-circular ring structures. The inner side of the circular ring is provided with a clamping groove for clamping the mold mounting seat 51 and the screw chamber shell 40. The cross section of the clamping groove is trapezoidal. One end of the two main parts is mounted on the screw chamber shell 40 through a rotating shaft, and the other ends of the two main parts are connected together by a locking part. By adjusting the locking part, the mold mounting seat 51 and the screw chamber shell 40 can be installed together. The locking part can be a bolt. When disassembling, it is only necessary to loosen the locking part and rotate the two main parts to easily remove the mold mounting seat 51, which is convenient for mold replacement.

[0069] The mold mounting base 51 is provided with a mold mounting hole 511 adapted for the corresponding mold. The wall of the mold mounting hole 511 is provided with a safety ring 512 that can block the corresponding mold. The safety ring 512 primarily serves to limit the upper limit of pressure inside the mold. It can be a thin-walled structure that is easily broken, or a structure with a breaking groove at its connection with the mold mounting hole 511. When the internal pressure of the mold exceeds the load-bearing capacity of the thin-walled structure of the safety ring 512, the thin-walled structure breaks, and the mold slides out of the mold mounting hole 511, releasing the internal pressure. For structures with a breaking groove, when the internal pressure of the mold exceeds the load-bearing capacity of the breaking groove of the safety ring 512, the safety ring 512 breaks along the breaking groove, and the mold slides out of the mold mounting hole 511, releasing the internal pressure and ensuring the safety of the equipment.

[0070] The safety ring 512 can also be designed as a split structure with the mold mounting base 51, and when it is damaged, it can be replaced by replacing the safety ring 512, so as to reduce the cost of replacing parts after damage and reduce the cost of equipment maintenance and use.

[0071] like Figure 3 As shown, in this embodiment, the screw shaft fixing seat 30 includes a fixing seat body 31, a thrust bearing 32 and a copper sleeve 33. The fixing seat body 31 is arranged in the optical axis section of the shaft body 11, and the copper sleeve 33 is installed in the fixing seat body 31, and the copper sleeve 33 is located between the inner wall of the fixing seat body 31 and the outer wall of the shaft body 11. The optical axis section of the shaft body 11 is provided with a pillow block, one end of the thrust bearing 32 acts on the pillow block, and the other end of the thrust bearing 32 acts on the inner wall of the fixing seat body 31, for providing a force to the shaft body 11 along the axial direction of the shaft body 11.

[0072] like Figure 2 and Figure 3 As shown, the above-mentioned single-screw extruder for sensitive materials also includes a drive motor 63, a reducer 64, a torque sensor 65 and a safety coupling 66. The drive motor 63 is installed at the input end of the reducer 64, and the output shaft of the drive motor 63 is connected to the input end of the reducer 64. The output end of the reducer 64 is connected to one end of the torque sensor 65 through a short shaft, and the other end of the torque sensor 65 is connected to one end of the safety coupling 66 through a short shaft. The other end of the safety coupling 66 is connected to one end of the screw shaft 10.

[0073] In this embodiment, the drive motor 63 provides high-speed, low-torque power; the reducer 64 provides stable, low-speed, high-torque power after deceleration; and the torque sensor 65 measures torque and transmits the torque value to the controller. The safety coupling 66, also known as a torque limiter, connects the driving machine and the working machine. Its primary function is overload protection. When the required torque exceeds a set value due to overload or mechanical failure, the torque limiter limits the torque transmitted by the transmission system by slipping. In this embodiment, the controller is connected to the drive motor 63 and the torque sensor 65. Based on data transmitted by the torque sensor 65, the temperature sensor 62, and the pressure sensor 61, as well as information such as production process parameters, the controller controls the motor speed to achieve continuous and efficient production. When the torque transmitted by the torque sensor exceeds a preset value, the controller stops the motor and alerts the operator to check the equipment and eliminate potential hazards. The safety coupling can limit the maximum torque transmitted by the motor to the screw shaft 10 in the event of a torque sensor failure, thereby preventing safety accidents.

[0074] like Figure 1 、 Figure 9 and Figure 10 As shown, the above-mentioned single-screw extrusion equipment for sensitive materials also includes a twin-conical screw feeding device 70, which is used to continuously feed the mixed material into the screw cavity of the single-screw extruder. The twin-conical screw feeding device 70 includes a screw drive component 71, a synchronous conveying twin screw 72, a twin screw cavity 73, a feed hopper 74, and a screw cavity discharge port 75. The screw drive component 71 is connected to the synchronous conveying twin screw 72 and is used to drive the synchronous conveying twin screw 72 to rotate. The screw conveying section of the synchronous conveying twin screw 72 is located in the twin screw cavity 73. The feed hopper 74 is located above the twin screw cavity 73. The screw cavity discharge port 75 is located in the axial direction of the synchronous conveying twin screw 72 and is connected to the feed port on the screw cavity housing 40.

[0075] The synchronous conveying twin screws 72 in this embodiment are as follows Figure 10 The two screws shown rotate synchronously at a certain angle. By controlling the screw drive component 71 to drive the two screws to rotate synchronously, stable and continuous material conveying can be achieved. At the same time, when the two screws rotate synchronously, they extrude and blend the material, increasing the density of the material entering the single-screw extrusion chamber, which can significantly improve the quality of the final product. In this embodiment, through two consecutive extrusions, the work on the material is continuously dispersed, avoiding the concentrated work on the material required for a single extrusion molding, which would cause heat increase and safety accidents.

[0076] The above-mentioned single-screw extruder for sensitive materials also includes a feeding device 80, which is used to feed the material into the feeding funnel 74 of the twin-conical screw feeding device 70, and can adopt various forms such as conveyor belts and manual feeding.

[0077] like Figure 1 and Figure 11 As shown, the feeding device 80 of this embodiment includes a material transport trolley 81 and a trolley lifting component 82. The material transport trolley 81 is used to deliver the material to the vicinity of the twin-cone screw feeding device 70. It can adopt a motor-driven track trolley, and the track is pre-laid on the ground. The motor drives the material transport trolley 81 to move along the track. The trolley lifting component 82 is used to pour the material in the material transport trolley 81 into the feeding funnel 74 of the twin-cone screw feeding device 70. The trolley lifting component 82 is arranged on one side of the twin-cone screw feeding device 70, and the trolley lifting component 82 is used to grab the material transport trolley 81 and pour the material in the material transport trolley 81 into the feeding funnel 74. The trolley lifting component 82 includes a sliding plate, a lifting motor, a lifting screw, two lifting arms and two guide columns. The two guide columns are both vertically fixed on the ground, and the two guide columns are respectively located on the left and right sides of the above-mentioned track. The lifting motor is located on top of the two guide columns, and its output shaft is connected to one end of the lifting screw via a speed reducer. The sliding plate is slidably mounted on the two guide columns, and a nut that mates with the lifting screw is fixedly mounted on the sliding plate. Rotating the lifting screw drives the nut and sliding plate to move up and down along the two guide columns. A lifting stub and a limiting stub are provided on the left and right side walls of the material transport trolley 81. Two lifting arms are fixed to the sliding plate, and the front ends of both arms are provided with U-shaped grooves that mate with the lifting stubs on the side walls of the material transport trolley 81. A pushing structure is also provided on the lifting arm or sliding plate. When the material transport trolley 81 is lifted, it is used to push the material transport trolley 81 forward around the lifting stub, thereby dumping the material inside the material transport trolley 81. The pushing structure can be a connecting rod structure driven by a pneumatic cylinder, an oil cylinder, or a motor. The limiting short shaft is used to prevent the material transport trolley 81 from over-tipping, and it can cooperate with the blocking structure provided on the lifting arm or the sliding plate. The blocking structure can be a blocking block, a blocking connecting rod, etc.

[0078] When loading materials, the material transport trolley 81 is first filled with materials and runs along the track to a position slightly forward below the trolley lifting component 82. The lifting motor is started and drives the lifting screw to drive the sliding plate to descend, and the sliding plate drives the two lifting arms to descend; after the lifting arms are lowered into place, the material transport trolley 81 moves toward the trolley lifting component 82 and moves to the predetermined position, that is, the lifting short shaft is just above the U-shaped groove. The lifting motor is started and drives the lifting screw to drive the sliding plate to rise, and the sliding plate drives the two lifting arms to rise. As the two lifting arms rise, the lifting short shaft is clamped into the U-shaped groove, and then the two lifting arms drive the material transport trolley 81 to rise; after rising to the appropriate height, the pushing structure pushes the material transport trolley 81 to tilt forward around the lifting short shaft to pour out the material in the material transport trolley 81.

[0079] like Figure 1 and Figure 12 As shown, the above-mentioned single-screw extruder for sensitive materials also includes a molding material collection device 90 for collecting and organizing the extruded material. Generally, an extrusion mold has multiple molding holes, which can extrude multiple pieces of molded material at a time. In this embodiment, the molding material collection device 90 includes a belt transmission device 91 and a material distribution device 92. One end of the belt transmission device 91 is located below the mold outlet, and the other end of the belt transmission device 91 is located above the material distribution device 92. The belt transmission device 91 uses a conveyor belt that can be adjusted in height and length. After the material is processed from the mold outlet, it is spread flat on the conveyor belt and transported to the material distribution device 92. The material distribution device 92 includes a telescopic bracket 921 and a chute 922. The upper end of the chute 922 is connected to the top of the telescopic bracket 921, and the lower end of the chute 922 extends away from the telescopic bracket 921. There are multiple chute 922, and the multiple chute 922 are evenly distributed along the circumference of the telescopic bracket 921. The number of the chutes 922 corresponds to the number of the forming holes in the mold, that is, the number of the chutes 922 is greater than or equal to the number of the forming holes in the mold.

[0080] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A single screw extrusion equipment for single base medicine, double base medicine and multi-base medicine, characterized in that: include: The screw shaft (10) comprises a shaft body (11), a sealing end cover (12) and a cooling water pipe (13); a spiral blade is provided on the outer wall of one end of the shaft body (11); the other end of the shaft body (11) is an optical axis structure; a shaft body water inlet (14) and a shaft body water outlet (15) are provided on the optical axis structure at the other end of the shaft body (11); a cooling hole (16) is provided along the central axis direction of the shaft body (11) on the end of the shaft body (11) on the outer wall of which the spiral blade is provided; the cooling hole (16) is connected to the shaft body water outlet (15) 15), the cooling water pipe (13) is arranged in the cooling hole (16) along the central axis direction of the shaft body (11), one end of the cooling water pipe (13) is fixedly connected to the shaft body (11), and the end of the cooling water pipe (13) connected to the shaft body (11) is connected to the shaft body water inlet (14), the sealing end cover (12) is arranged at the orifice of the cooling hole (16), and the sealing end cover (12) is sealed and connected to the shaft body (11), and the other end of the cooling water pipe (13) is spaced apart from the sealing end cover (12); a rotating water jacket (20), the rotating water jacket (20) being mounted on the shaft (11), the water inlet of the rotating water jacket (20) being in communication with the shaft water inlet (14), and the water outlet of the rotating water jacket (20) being in communication with the shaft water outlet (15); A screw shaft fixing seat (30), wherein the screw shaft fixing seat (30) is sleeved on one end of the optical axis structure of the shaft body (11), and the screw shaft fixing seat (30) is rotatably connected to the shaft body (11); A screw chamber housing (40), the screw chamber housing (40) is sleeved on the outer side of the spiral blade end of the shaft body (11), one end of the screw chamber housing (40) is fixedly connected to the screw shaft fixing seat (30), and a pressure relief port (41) is provided on the screw chamber housing (40), and the pressure relief port (41) is located at one end of the screw chamber housing (40) close to the screw shaft fixing seat (30); and a shell cooling structure (45), wherein the shell cooling structure (45) is coated on the outside of the screw chamber shell (40) and is used to cool the screw chamber shell (40).

2. The single screw extrusion equipment for single base medicine, double base medicine and multi-base medicine according to claim 1, characterized in that: The single-screw extruder for sensitive materials further comprises a gasket (44), which is arranged between the screw chamber shell (40) and the spiral blades arranged on the outer wall of the shaft body (11).

3. The single screw extrusion equipment for single base medicine, double base medicine and multi-base medicine according to claim 1, characterized in that: The screw chamber shell (40) includes a feed section (42) and a cooling section (43), one end of the feed section (42) is fixedly connected to the screw shaft fixing seat (30), and the other end of the feed section (42) is fixedly connected to the cooling section (43), and the shell cooling structure (45) is covered on the outside of the cooling section (43).

4. The single screw extrusion equipment for single base medicine, double base medicine and multi-base medicine according to claim 1, characterized in that: The sensitive material single-screw extruder further comprises a pressure sensor (61) and a temperature sensor (62). Both the pressure sensor (61) and the temperature sensor (62) are arranged at one end of the cooling section (43) away from the feeding section (42), and are respectively used to measure the pressure and temperature of the extruded material in the screw chamber housing (40) in real time.

5. The single screw extrusion equipment for single base medicine, double base medicine and multi-base medicine according to claim 1, characterized in that: The single-screw extruder for sensitive materials further comprises a mold fixing component (50), wherein the mold fixing component (50) comprises a mold mounting seat (51) and a connecting portion (52), wherein the mold mounting seat (51) is arranged at one end of the screw chamber housing (40) away from the screw shaft fixing seat (30), and the connecting portion (52) is arranged at the connection between the mold mounting seat (51) and the screw chamber housing (40), and the connecting portion (52) is used to connect the mold mounting seat (51) and the screw chamber housing (40) together; a mold mounting hole (511) adapted to a corresponding mold is provided in the mold mounting seat (511), and a safety ring (512) for blocking the corresponding mold is provided on the hole wall of the mold mounting hole (511).

6. The single screw extrusion equipment for single base medicine, double base medicine and multi-base medicine according to claim 1, characterized in that: The screw shaft fixing seat (30) includes a fixing seat body (31), a thrust bearing (32) and a copper sleeve (33), wherein the fixing seat body (31) is arranged in the optical axis section of the shaft body (11), the copper sleeve (33) is installed in the fixing seat body (31), and the copper sleeve (33) is located between the inner wall of the fixing seat body (31) and the outer wall of the shaft body (11), the optical axis section of the shaft body (11) is provided with a pillow block, one end of the thrust bearing (32) acts on the pillow block, and the other end of the thrust bearing (32) acts on the inner wall of the fixing seat body (31), so as to provide the shaft body (11) with an axial force along the shaft body (11).

7. The single screw extrusion equipment for single base medicine, double base medicine and multi-base medicine according to claim 1, characterized in that: The sensitive material single-screw extruder further includes a drive motor (63), a reducer (64), a torque sensor (65) and a safety coupling (66). The drive motor (63) is installed at the input end of the reducer (64). The output shaft of the drive motor (63) is connected to the input end of the reducer (64). The output end of the reducer (64) is connected to one end of the torque sensor (65) through a short shaft. The other end of the torque sensor (65) is connected to one end of the safety coupling (66) through a short shaft. The other end of the safety coupling (66) is connected to one end of the screw shaft (10).

8. The single screw extrusion equipment for single base medicine, double base medicine and multi-base medicine according to claim 1, characterized in that: The sensitive material single-screw extrusion device further includes a twin-conical screw feeding device (70), which includes a screw driving component (71), a synchronous conveying twin screw (72), a twin screw chamber (73), a feeding funnel (74) and a screw chamber discharge port (75). The screw driving component (71) is connected to the synchronous conveying twin screw (72), and the screw driving component (71) is used to drive the synchronous conveying twin screw (72) to rotate. The screw conveying section of the synchronous conveying twin screw (72) is located in the twin screw chamber (73), the feeding funnel (74) is located above the twin screw chamber (73), the screw chamber discharge port (75) is located in the axial direction of the synchronous conveying twin screw (72), and the screw chamber discharge port (75) is connected to the feed port on the screw chamber shell (40).

9. The single screw extrusion equipment for single base medicine, double base medicine and multi-base medicine according to claim 1, characterized in that: The sensitive material single-screw extruder device further includes a feeding device (80), which includes a material transport trolley (81) and a trolley lifting component (82). The trolley lifting component (82) is arranged on one side of the twin-conical screw feeding device (70), and the trolley lifting component (82) is used to grab the material transport trolley (81) and pour the material in the material transport trolley (81) into the feeding funnel (74).

10. The single screw extrusion equipment for single base medicine, double base medicine and multi-base medicine according to claim 1, characterized in that: The sensitive material single-screw extrusion device also includes a molding material collecting device (90), and the molding material collecting device (90) includes a belt transmission device (91) and a material distribution device (92). One end of the belt transmission device (91) is located below the mold outlet, and the other end of the belt transmission device (91) is located above the material distribution device (92). The material distribution device (92) includes a telescopic bracket (921) and a slide (922). The upper end of the slide (922) is connected to the top of the telescopic bracket (921), and the lower end of the slide (922) is expanded in a direction away from the telescopic bracket (921). There are multiple slides (922), and the multiple slides (922) are evenly distributed along the circumference of the telescopic bracket (921).

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