Constant negative pressure device for traditional Chinese medicine extraction

Abstract

The application relates to the technical field of traditional Chinese medicine extraction equipment, and discloses a constant negative pressure device for traditional Chinese medicine extraction, which comprises a rotary contact structure, a contact linkage structure and a pressure control contact linkage structure. The constant negative pressure device for traditional Chinese medicine extraction utilizes the peristaltic pump principle to improve the effective transmission rate and utilization rate of the medicinal liquid vapor, and utilizes the elasticity of the spiral spring to control the maximum rotating degree between the torque driving force of the driving motor and the stick used for rotary extrusion of the peristaltic tube, effectively controls the maximum negative pressure value inside the concentrated medicinal liquid cavity, plays a constant negative pressure role, thereby reduces the pressure difference range of the negative pressure value inside the concentrated medicinal liquid cavity, and improves the precision of the pressure on the medicinal liquid concentration process.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of traditional Chinese medicine extraction equipment, in particular to a constant negative pressure device for traditional Chinese medicine extraction. BACKGROUND

[0002] In the development of traditional Chinese medicine drugs, the concentration process of medicinal liquid is a very important link in the production process of traditional Chinese medicine, which directly relates to the composition and content of traditional Chinese medicine drugs, and further affects the curative effect of traditional Chinese medicine products. In the negative pressure evaporation process of traditional Chinese medicine extraction, a rotary evaporator is used for negative pressure distillation, and a water circulating vacuum pump is used for vacuumizing. During use, since the water circulating vacuum pump cannot adjust the negative pressure, after it is turned off, due to the action of water vapor, the pressure inside the concentration cavity will increase. At this time, the water circulating vacuum pump needs to be started again. At this time, the pressure inside the concentration cavity will present a large pressure difference, resulting in low concentration effect. In other words, the above-mentioned water circulating vacuum pump cannot realize the constant negative pressure function of the pressure inside the concentration cavity, resulting in a large and obvious pressure difference, which seriously affects the precision of the pressure on the concentration process of medicinal liquid. SUMMARY

[0003] (I) Technical problems solved

[0004] In view of the deficiencies of the prior art, the present application provides a constant negative pressure device for traditional Chinese medicine extraction. By using the principle of peristaltic pump, the steam containing medicinal liquid can be directly discharged to the next mechanism, thereby improving the effective transmission rate and utilization rate of the medicinal liquid steam. In addition, by using the elasticity of the spiral spring, the maximum rotation degree between the torque driving force of the driving motor and the stick for rotatingly extruding the peristaltic tube can be controlled. The elastic reaction force for the spiral spring comes from the negative pressure value inside the concentrated medicinal liquid cavity. Therefore, once the negative pressure value is greater than the maximum rotation degree, the rotor of the driving motor can be separated from the driven structure, so that the negative pressure value inside the concentrated medicinal liquid cavity cannot be further increased. The maximum negative pressure value inside the concentrated medicinal liquid cavity is effectively controlled, the constant negative pressure effect is achieved, the pressure difference range of the negative pressure value inside the concentrated medicinal liquid cavity is reduced, the precision of the pressure on the concentration process of medicinal liquid is improved, and the above technical problems are solved.

[0005] (II) Technical scheme

[0006] In order to achieve the above object, the present application provides the following technical scheme: A constant negative pressure device for traditional Chinese medicine extraction, comprising a horizontal shell with a fixed base plate installed at the bottom, a component rotating cavity arranged in the horizontal shell, a gas valve for communicating the component rotating cavity, a pipeline clamping groove arranged along the periphery of the middle region of the component rotating cavity, a peristaltic tube laid in the pipeline clamping groove and partially protruding from the pipeline clamping groove, a horizontal hollow pipeline body installed at the inlet and outlet ports of the peristaltic tube and penetrating the corresponding end face structure of the horizontal shell through a sealing structure, a curved pipeline body for connecting the horizontal hollow pipeline body at the gas inlet of the peristaltic tube, a high-pressure exhaust hose for connecting the horizontal hollow pipeline body at the gas outlet of the peristaltic tube, a component mounting shell installed at the top end of the horizontal shell, a component mounting cavity arranged in the center of the component mounting shell, and a drive motor invertedly installed in the component mounting cavity, further comprising a rotating contact structure rotatably installed in the horizontal shell through a mechanical sealing structure, the edge of which is provided with a stick capable of rotatingly extruding the peristaltic tube in the annular region when it performs circumferential motion around the center line of the rotating contact structure, and an internal hexagonal hole rotating with the circumferential motion; a contact linkage structure located in the component mounting cavity and rotatable with the rotor of the drive motor, the inside of which is provided with a hemispherical body and a hemispherical groove capable of being separated longitudinally when the torque strength is greater than the rated value, so that the rotating linkage cannot be generated; and a pressure control contact linkage structure rotatably installed at the bottom end of the rotating contact structure through a mechanical sealing structure, the inside of which is provided with a cylindrical piston body subjected to the upward elastic force of a spiral spring and the downward suction force of the gas negative pressure in the concentrated cavity of the concentration tank, and a hexagonal protruding column provided at the top and capable of rotating with the contact linkage structure and driving the rotating contact structure to rotate.

[0007] Preferably, the rotating contact structure comprises a rotating sleeve rotatably installed in the longitudinal structure of the horizontal shell through a mechanical sealing structure, the center of the rotating sleeve is provided with an internal hexagonal hole, and the rotating sleeve is integrally provided with two groups of symmetrically designed limiting vertical plate structures outside the cylinder in the component rotating cavity, each group of limiting vertical plate structures comprises two symmetrically designed limiting vertical plate structures, and the rotatable stick is installed between the end faces away from the rotating sleeve through a bearing and a shaft body.

[0008] Preferably, when the stick extrudes the peristaltic tube in contact, the inner tube hole of the peristaltic tube is in a completely closed state.

[0009] Preferably, the center line of the rotating sleeve coincides with the center line of the annular region of the peristaltic tube.

[0010] Preferably, the interference linkage structure comprises an upper rotating plate and a lower rotating plate, the upper end surface of the upper rotating plate is provided with a shaft body mounting groove for fixedly mounting a rotor in the center, the bottom end of the lower rotating plate is provided with a first linkage shaft in an integral structure in the center, the lower end surface of the upper rotating plate is provided with a plurality of hemispheres arranged in an integral and annular array at a position close to the edge thereof, and the upper end surface of the lower rotating plate is provided with a hemispherical groove for clamping each hemisphere at a corresponding position, and the hemispherical grooves are connected in series through an annular sliding groove.

[0011] Preferably, there is a gap between the upper rotating plate and the lower rotating plate.

[0012] Preferably, the depth of the hemispherical groove is greater than the depth of the annular sliding groove and less than the radius of the hemisphere, and the curved surfaces of the hemispherical groove and the annular sliding groove are consistent with the curved surface of the hemisphere.

[0013] Preferably, the pressure control interference linkage structure comprises a hollow cylinder, a longitudinal movable cavity is arranged in the center of the hollow cylinder, an annular sealing ring is arranged at the bottom end of the hollow cylinder, a ventilation hole is arranged in the center of the hollow cylinder and communicates with the longitudinal movable cavity, a cylindrical piston body that can move axially and rotate is arranged in the longitudinal movable cavity, a helical spring that generates an upward elastic force is arranged at the bottom of the cylindrical piston body, a second linkage shaft that is integral and penetrates through the corresponding structure of the hollow cylinder is arranged in the center of the upper end surface of the cylindrical piston body, the second linkage shaft is inserted into the middle of the internal hexagonal hole, and a hexagonal protruding column in an integral structure is arranged at the top end, and the upper end surface of the hexagonal protruding column is provided with a concave fixing groove for fixedly mounting the bottom end shaft body of the first linkage shaft.

[0014] Preferably, the structure and shape of the cross section of the hexagonal protruding column are consistent with the structure and shape of the cross section of the internal hexagonal hole, and both are regular hexagonal structures.

[0015] Preferably, the structure and size of the cross section of the hexagonal protruding column are matched with the structure and size of the cross section of the internal hexagonal hole.

[0016] Compared with the prior art, the constant negative pressure device for traditional Chinese medicine extraction has the following beneficial effects:

[0017] The constant negative pressure device for traditional Chinese medicine extraction utilizes the peristaltic pump principle, can make the steam with liquid medicine directly discharged to the next mechanism, thereby improving the effective transmission rate and use rate of the liquid medicine steam, and utilizes the elasticity of the spiral spring to control the maximum rotation degree between the torque driving force of the driving motor and the stick for rotatingly extruding the peristaltic tube, and the elastic reaction force for the spiral spring comes from the negative pressure value inside the concentrated liquid medicine cavity, therefore, once the negative pressure value is greater than the maximum rotation degree, the rotor of the driving motor can be separated from the driven structure, thereby unable to further increase the negative pressure value inside the concentrated liquid medicine cavity, effectively controls the maximum negative pressure value inside the concentrated liquid medicine cavity, plays the role of constant negative pressure, thereby reducing the pressure difference range of the negative pressure value inside the concentrated liquid medicine cavity, and improving the precision of the pressure on the liquid medicine concentration process. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a full section structure schematic view of the present application;

[0019] Figure 2 It is a perspective view of the present application;

[0020] Figure 3 It is a perspective view of the peristaltic tube and the horizontal hollow pipe body in the present application;

[0021] Figure 4 It is a perspective view of the rotating resistance structure in the present application;

[0022] Figure 5 It is a perspective view of the resistance linkage structure in the present application;

[0023] Figure 6 It is a perspective exploded view of the resistance linkage structure in the present application;

[0024] Figure 7 It is a perspective view of the pressure control resistance linkage structure in the present application;

[0025] Figure 8 It is a perspective view of the pressure control resistance linkage structure in the present application;

[0026] Wherein: 1, horizontal shell; 2, component rotation cavity; 3, fixed base plate; 4, gas valve; 5, pipeline clamping groove; 6, component mounting shell; 7, drive motor; 8, component mounting cavity; 9, curved pipeline body; 10, rotor; 11, peristaltic tube; 12, horizontal hollow pipeline body; 13, rotating resistance structure; 131, rotating sleeve; 132, internal hexagonal hole; 133, limiting vertical plate structure; 134, bearing and shaft; 135, stick; 14, resistance linkage structure; 141, upper rotating plate; 142, lower rotating plate; 143, shaft mounting groove; 144, first linkage shaft; 145, hemispherical body; 146, hemispherical groove; 147, annular sliding groove; 15, pressure control resistance linkage structure; 151, hollow cylinder; 152, longitudinal movable cavity; 153, air hole; 154, annular sealing ring; 155, cylindrical piston body; 156, second linkage shaft; 157, hexagonal protruding column; 158, fixed groove; 159, spiral spring; 16, high-pressure exhaust hose. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0028] Please refer to Figure 1 and Figure 2 A constant negative pressure device for traditional Chinese medicine extraction, comprising a horizontal shell 1 having a fixed base plate 3 installed at the bottom, a component rotation cavity 2 arranged inside the horizontal shell 1, a gas valve 4 for communicating the component rotation cavity 2, a pipeline clamping groove 5 arranged along the periphery of the middle region of the component rotation cavity 2, a peristaltic tube 11 laid in the pipeline clamping groove 5 and partially protruding out of the pipeline clamping groove 5, please refer to Figure 3Also included are horizontal hollow pipe bodies 12 installed at the inlet and outlet ports of the peristaltic tube 11 and passing through the corresponding end face structures of the horizontal shell 1 by the sealing structure, wherein the peristaltic tube 11 is a hose in a peristaltic pump and has the same structure, a curved pipe body 9 for connecting the horizontal hollow pipe body 12 at the gas inlet position of the peristaltic tube 11, a high-pressure exhaust hose 16 for connecting the horizontal hollow pipe body 12 at the gas outlet position of the peristaltic tube 11, a component mounting shell 6 installed at the top end of the horizontal shell 1, a component mounting cavity 8 arranged at the center of the component mounting shell 6, and a drive motor 7 installed upside down in the component mounting cavity 8. The fixed base plate 3 can be fixedly installed on the surface of the condenser tank, then the gas inlet port of the curved pipe body 9 is connected with a corresponding gap in the condenser tank, and the gas outlet of the high-pressure exhaust hose 16 is connected with the gas inlet port of the condenser equipment for high-temperature steam of the liquid medicine. When the peristaltic tube 11 is subjected to horizontal pressure, it will deform and be completely extruded. After extrusion, due to the rotation of the rotor of the drive motor 7, the gas confined in the peristaltic tube 11 will be driven to circulate, so that the gas is discharged from the condenser tank to the condenser equipment, the pressure in the condenser tank is reduced, and the device can make the steam of the liquid medicine in the condenser tank move to the condenser equipment and achieve pressure reduction, thereby improving the effective transmission rate and utilization rate of the steam of the liquid medicine.

[0029] Of course, before use, the gas valve 4 can be opened by the air extraction equipment, the air extraction pipe is inserted into the component rotating cavity 2, the gas in the component rotating cavity 2 is extracted to form a vacuum area, and the vacuum pressure needs to be not less than the strength of negative pressure extraction of the condenser tank. When the negative pressure value in the condenser tank increases, the negative pressure area directly affects the outward resetting ability of the peristaltic tube 11, and the negative pressure area in the component rotating cavity 2 can make the peristaltic tube 11 have the outward resetting ability, so that the influence of negative pressure on the peristaltic tube 11 can have the effect of mutual offset, the peristaltic tube 11 can reset normally by relying on its own resetting elasticity, and the normal driving ability of the gas can be realized.

[0030] In order to realize the circulating extrusion function of the peristaltic tube 11 and have the ability to transfer the rotating force, please refer to Figure 1 and Figure 2, need to set the rotating resistance structure 13, through the mechanical seal structure can be installed in the horizontal shell 1, its edge is provided with a stick 135 which can be in the generation of around the center line of the rotating resistance structure 13 circumferential motion, the peristaltic tube 11 is rotated extrusion, make its pipe hole closed and the circular motion of the rotating inner hexagonal hole 132, the rotation of the rotor 10 will bring the hexagonal convex column 157 rotation, the hexagonal convex column 157 can bring the inner hexagonal hole 132 rotation, so that the stick 135 around the center line of the structure of the circumferential motion, the stick 135 of circumferential motion can produce the peristaltic tube 11 constantly circulating extrusion effect, so as to realize the directional driving of the gas in the device, and the stick 135 in contact with the peristaltic tube 11 surface, due to the friction between the two, can make the stick 135 produce rotation, the stick 135 and the peristaltic tube 11 of the tube body between the rolling friction, can effectively reduce the negative effect caused by the friction between the two, thereby improving the effective service life between the two.

[0031] The specific structure of the rotating resistance structure 13, please refer to Figure 4 , including the rotating sleeve 131 which can be installed in the longitudinal structure of the horizontal shell 1 through the mechanical seal structure, in order to make the rotating stick 135 can produce the peristaltic tube 11 with rotating form of the driving effect, need to make the center line of the rotating sleeve 131 coincide with the center line of the peristaltic tube 11 in the annular region, the center of the rotating sleeve 131 is provided with an inner hexagonal hole 132, the rotating sleeve 131 is integrally provided with two groups of symmetrical design of limiting vertical plate structure 133 in the outer periphery of the cylinder body inside the component rotating cavity 2, each group of limiting vertical plate structure 133 includes two upper and lower symmetrical design of limiting vertical plate structure 133, each group of limiting vertical plate structure 133 is installed with rotatable stick 135 between the end face away from the rotating sleeve 131 through the bearing and shaft 134, in order to make the stick 135 can produce the necessary driving function, need to make the stick 135 contact extrusion of the peristaltic tube 11, the inner tube hole of the peristaltic tube 11 is in the closed state, the inner hexagonal hole 132 can make the rotating sleeve 131 rotate when subjected to rotating force, in turn make the stick 135 do the circumferential motion around the axis of the rotating sleeve 131, at the same time, the stick 135 can also have the function of self rotation, so as to realize the revolution and rotation of the stick 135.

[0032] In order to realize the force transmission of the driving motor 7 and have the linkage and separation function, please refer to Figure 1, need to set the resistance type linkage structure 14, located inside the component installation cavity 8, and can rotate with the rotor 10 of the drive motor 7, which is provided with a longitudinal separation that can be generated after the torque strength is greater than the rated value, and then cannot produce a rotating linkage of the hemisphere 145 and the hemisphere groove 146, the upper rotating plate 141 rotates with the rotor 10 of the drive motor 7, and the plurality of hemispheres 145 will move along the center line of the structure. Because the hemisphere 145 is clamped inside the hemisphere groove 146, it can drive the lower rotating plate 142 to rotate, thereby achieving the linkage effect, and the hemisphere groove 146 is subjected to pressure from below on the contact surface of the hemisphere 145. When the torque resistance of the hemisphere 145 and the hemisphere groove 146 is downward, the hemisphere 145 will be separated from the hemisphere groove 146, and the linkage between the two cannot continue, thereby achieving the function of separation. Once the two are separated, the air extraction work cannot continue, thereby achieving the function of starting and stopping the air extraction function in time.

[0033] For the specific structure of the resistance type linkage structure 14, please refer to Figure 5 and Figure 6 , including the upper rotating plate 141 and the lower rotating plate 142, in order to prevent the upper and lower end surfaces from being in contact and causing the friction force to increase when rotating, thereby improving the effective utilization rate of the torque, it is necessary to have a certain gap between the upper rotating plate 141 and the lower rotating plate 142. The upper end surface of the upper rotating plate 141 is provided with a shaft body mounting groove 143 for fixedly mounting the rotor 10, and the bottom end of the lower rotating plate 142 is provided with a first linkage shaft 144 of integral structure. The lower end surface of the upper rotating plate 141 is provided with a plurality of hemispheres 145 of integral and annular array at the edge thereof. The upper end surface of the lower rotating plate 142 is provided with a hemisphere groove 146 for clamping each hemisphere 145 at the corresponding position. A plurality of hemisphere grooves 146 are connected in series through an annular sliding groove 147. In order to make the hemisphere 145 more easily separated from the hemisphere groove 146 and improve the force accuracy between the two, the depth of the hemisphere groove 146 is greater than the depth of the annular sliding groove 147 and less than the radius of the hemisphere 145. The curved surface of the hemisphere groove 146 and the annular sliding groove 147 is consistent with the curved surface of the hemisphere 145. When the hemisphere groove 146 is clamped at the bottom area of the hemisphere 145, the linkage function can be generated, thereby synchronously rotating the upper rotating plate 141 and the lower rotating plate 142. Once the hemisphere 145 is separated from the hemisphere groove 146, it will rotate and slide along the annular sliding groove 147, and will pass through each hemisphere groove 146 again. When the air pressure inside the condenser increases, the pressure from below in the hemisphere groove 146 will increase. When it increases to a certain extent, the lower rotating plate 142 will continue to rotate with the upper rotating plate 141, and the vacuum air extraction function will be generated again, thereby achieving constant negative pressure driving capability.

[0034] In order to realize and concentrate the tank inside the linkage pressure control effect, please refer to Figure 1 and Figure 2 , need to set pressure control resistance linkage structure 15, by mechanical seal structure can be rotated installed in the bottom of the rotating resistance structure 13, its inside is provided with the upward elastic force of the spiral spring 159 and the downward suction force of the gas negative pressure inside the concentrated cavity in the concentration tank, and the top is provided with a hexagonal convex column 157 which can rotate with the resistance linkage structure 14 and drive the rotating resistance structure 13 to rotate. In use, the hollow column 151 is fixedly installed on the surface of the concentration tank, and the air hole 153 is communicated with the concentrated cavity of the concentration tank. During the air extraction, the negative pressure in the concentration tank will produce a downward movement trend to the cylindrical piston body 155, while the spiral spring 159 will produce an upward movement trend to the cylindrical piston body 155. When the negative pressure intensity in the concentrated cavity is less than the elastic intensity of the spiral spring 159, due to the longitudinal linkage effect of the components, the hemispherical groove 146 will be clamped on the bottom of the hemispherical body 145, so that the components can normally produce rotary linkage, thereby driving the stick 135 to contact extrusion of the peristaltic tube 11, realizing the continuous air extraction function of the inside of the concentration tank. Once the negative pressure intensity in the concentrated cavity is greater than the elastic intensity of the spiral spring 159, the downward component of the torque resistance of the hemispherical body 145 and the hemispherical groove 146 is greater than the pressure from below, the hemispherical body 145 will be separated from the hemispherical groove 146, and the linkage between them cannot continue, thereby realizing the function of separation. Once the two are separated, the air extraction work cannot continue, thereby realizing the constant pressure air extraction effect.

[0035] Among them, the elastic intensity of the spiral spring 159 to the cylindrical piston body 155 in the initial state is the maximum control intensity of the negative pressure intensity in the concentration tank. In other words, the elastic intensity of the spiral spring 159 to the cylindrical piston body 155 in the initial state is the rated value of the constant pressure intensity.

[0036] For the specific structure of the pressure control resistance linkage structure 15, please refer to Figure 7 and Figure 8, including hollow cylinder 151, the center of hollow cylinder 151 is provided with longitudinal movable cavity 152, the bottom center of hollow cylinder 151 is placed annular sealing ring 154, hollow cylinder 151 is provided with ventilation hole 153 communicating with longitudinal movable cavity 152, the inside of longitudinal movable cavity 152 is placed cylindrical piston body 155 which can move axially and rotate, the bottom of cylindrical piston body 155 is placed helical spring 159 which generates upward elastic force, the center of upper end surface of cylindrical piston body 155 is provided with second linkage shaft 156 which is integrated and penetrates the corresponding structure of hollow cylinder 151, second linkage shaft 156 is inserted into the middle of internal hexagonal hole 132, and the top end is provided with hexagonal protruding column 157 which is integrated structure, in order to realize the linkage effect of rotation function, it is necessary to make the structure shape of cross section of hexagonal protruding column 157 consistent with the structure shape of cross section of internal hexagonal hole 132, which are both regular hexagonal structure, the structure size of cross section of hexagonal protruding column 157 matches the structure size of cross section of internal hexagonal hole 132, the upper end surface of hexagonal protruding column 157 is provided with concave fixing groove 158 which is used for fixing and installing the bottom shaft of first linkage shaft 144, the upward elastic force of helical spring 159 to cylindrical piston body 155 can make hexagonal protruding column 157 drive hemispherical groove 146 to be clamped on the bottom periphery of hemispherical body 145, realize the linkage rotation effect, at the same time, hexagonal protruding column 157 is inserted into the inside of internal hexagonal hole 132, so that hexagonal protruding column 157 can rotate with first linkage shaft 144, and can drive internal hexagonal hole 132 to rotate, realize the linkage effect of rotation strength, and the rotation linkage will not disappear due to the movement of components in the longitudinal direction, realize the function of linkage at all times.

[0037] Firstly, the gas valve 4 can be opened by the air extraction equipment, the air extraction pipe is inserted into the inside of component rotation cavity 2, the gas in the inside of component rotation cavity 2 is extracted to form a vacuum area, the vacuum pressure needs to be not less than the strength of negative pressure extraction of the concentration tank, the air extraction equipment is closed, the gas valve 4 is closed, in use, two holes which start two communication parts of the top of the concentration cavity of the traditional Chinese medicine extraction concentration tank are needed, then ventilation hole 153 and curved pipeline body 9 are respectively connected with the two holes, and the connecting parts are sealed, at the same time, fixed base plate 3 is fixedly installed on the surface of the tank body of the concentration tank, finally, the discharge end of high pressure exhaust hose 16 is connected with the gas inlet port of the condensing equipment of the high temperature steam of the liquid medicine, the driving motor 7 is started for a period of time, when the metal impact sound occurs, it indicates that the disengagement and impact sound between hemispherical body 145 and hemispherical groove 146 occurs, which indicates that the negative pressure value of the concentration tank reaches the rated strength, so that the concentration tank can extract and concentrate traditional Chinese medicine, after the work is completed, the driving motor 7 is started to rotate reversely, at this time, the gas in the tank can enter the inside of the concentration tank, so that the gas can be supplemented, thereby opening the concentration tank, and the work is completed.

[0038] While embodiments of the application have been shown and described, it is to be understood that the embodiments described are merely exemplary of the principles and application of the present application. Numerous modifications and adaptions can be made without departing from the spirit and scope of the present application, which is defined by the following claims and their equivalents.

Claims

1. A constant negative pressure device for traditional Chinese medicine extraction, comprising a horizontal shell (1) with a fixed base plate (3) installed at the bottom, a component rotating cavity (2) arranged inside the horizontal shell (1), a gas valve (4) for communicating the component rotating cavity (2), a pipeline clamping groove (5) arranged along the periphery of the middle region of the component rotating cavity (2), a peristaltic tube (11) laid in the pipeline clamping groove (5) and partially protruding from the pipeline clamping groove (5), a horizontal hollow pipeline body (12) installed at the inlet and outlet ports of the peristaltic tube (11) and penetrating the corresponding end face structure of the horizontal shell (1) through a sealing structure, a curved pipeline body (9) for docking the horizontal hollow pipeline body (12) belonging to the gas inlet part of the peristaltic tube (11), a high-pressure exhaust hose (16) for docking the horizontal hollow pipeline body (12) belonging to the exhaust part of the peristaltic tube (11), a component mounting shell (6) installed at the top end of the horizontal shell (1), a component mounting cavity (8) arranged at the center of the component mounting shell (6), and a drive motor (7) installed upside down inside the component mounting cavity (8), characterized in that: Also includes Rotary resistance structure (13) is rotatably mounted in the horizontal shell (1) through mechanical seal structure, the edge is provided with the stick (135) which can rotate extrusion to the peristaltic tube (11) of annular area when it generates circumferential motion around the center line of rotary resistance structure (13), and the internal hexagonal hole (132) is rotated with the circumferential motion; Resistance linkage structure (14) is located inside the component mounting cavity (8) and can rotate with the rotor (10) of driving motor (7), and the inside is provided with the hemisphere (145) and the hemisphere groove (146) which can be separated longitudinally when the torque intensity is greater than the rated value, so that the rotating linkage cannot be generated; And pressure control resistance linkage structure (15) is rotatably mounted at the bottom end of rotary resistance structure (13) through mechanical seal structure, and the inside is provided with the cylindrical piston body (155) which is subjected to the upward elastic force of helical spring (159) and the downward suction force of gas negative pressure inside the concentrated cavity in the concentrated tank, and the top is provided with the hexagonal convex column (157) which can rotate with resistance linkage structure (14) and drive rotary resistance structure (13) to rotate; The rotary resistance structure (13) comprises a rotary sleeve (131) rotatably mounted in the longitudinal structure of the horizontal shell (1) through mechanical seal structure, the center of the rotary sleeve (131) is provided with an internal hexagonal hole (132), the rotary sleeve (131) is integrally provided with two groups of symmetrical designed limiting vertical plate structures (133) outside the cylinder in the component rotating cavity (2), each group of limiting vertical plate structures (133) comprises two upper and lower symmetrical designed limiting vertical plate structures (133), and the rotatable stick (135) is rotatably mounted between the end faces away from the rotary sleeve (131) of each group of limiting vertical plate structures (133) through bearing and shaft body (134); The resistance linkage structure (14) comprises an upper rotating plate (141) and a lower rotating plate (142), the upper end surface of the upper rotating plate (141) is provided with a shaft mounting groove (143) for fixedly mounting the rotor (10), the bottom end center of the lower rotating plate (142) is provided with a first linkage shaft (144) of integral structure, the lower end surface of the upper rotating plate (141) is provided with a plurality of hemispheres (145) of integral and annular array at the edge close to the edge, and the upper end surface of the lower rotating plate (142) is provided with a plurality of hemisphere grooves (146) for clamping each hemisphere (145) at the corresponding part, and a plurality of hemisphere grooves (146) are connected in series through annular sliding grooves (147). The pressure control resistance contact linkage structure (15) comprises a hollow cylinder (151) with a longitudinal movable cavity (152) in the center, an annular sealing ring (154) at the bottom center of the hollow cylinder (151), a ventilation hole (153) in the center of the hollow cylinder (151) communicating with the longitudinal movable cavity (152), a cylindrical piston body (155) movably arranged in the longitudinal movable cavity (152) and rotatable, a helical spring (159) at the bottom of the cylindrical piston body (155) to generate upward elastic force, a second linkage shaft (156) integrally provided at the center of the upper end surface of the cylindrical piston body (155) and penetrating the corresponding structure of the hollow cylinder (151), the second linkage shaft (156) inserted into the middle of the inner hexagonal hole (132) and provided with a hexagonal protruding column (157) at the top end, the upper end surface of the hexagonal protruding column (157) provided with a concave fixed groove (158) for fixing and mounting the bottom shaft body of the first linkage shaft (144).

2. The constant negative pressure device for traditional Chinese medicine extraction according to claim 1, characterized in that: When the stick (135) contacts and extrudes the peristaltic tube (11), the inner tube hole of the peristaltic tube (11) is in a completely closed state.

3. The constant negative pressure device for traditional Chinese medicine extraction according to claim 2, characterized in that: The center line of the rotating sleeve (131) coincides with the center line of the annular area in the peristaltic tube (11).

4. The constant negative pressure device for traditional Chinese medicine extraction according to claim 3, characterized in that: There is a certain gap between the upper rotating plate (141) and the lower rotating plate (142).

5. The constant negative pressure device for traditional Chinese medicine extraction according to claim 4, characterized in that: The depth of the semispherical groove (146) is greater than the depth of the annular sliding groove (147) and less than the radius of the semisphere (145), and the curved surfaces of the semispherical groove (146) and the annular sliding groove (147) are consistent with the curved surface of the semisphere (145).

6. The constant negative pressure device for traditional Chinese medicine extraction according to claim 5, characterized in that: The cross-sectional structure of the hexagonal protruding column (157) is consistent with the cross-sectional structure of the inner hexagonal hole (132), both being regular hexagonal structures.

7. The constant negative pressure device for traditional Chinese medicine extraction according to claim 6, characterized in that: The cross-sectional structure size of the hexagonal protruding column (157) matches the cross-sectional structure size of the inner hexagonal hole (132).

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