Quantitative filling equipment of cream packaging machine and cream packaging machine

Abstract

The utility model discloses a quantitative filling device of a cream formula packaging machine and the cream formula packaging machine. The quantitative filling device comprises a fixed bottom plate, the plunger pump is arranged on the fixed bottom plate and is provided with a plunger sleeve and a plunger, one end of the plunger can move in the plunger sleeve, and the other end of the plunger is arranged outside the plunger sleeve; the lead screw is provided with a screw rod and a sliding block in threaded connection with the screw rod, the screw rod rotates, and the sliding block moves along the axis of the screw rod; the screw rod is arranged on the fixed bottom plate, the axis of the screw rod is parallel to the axis of the plunger sleeve, the sliding block is connected with the plunger, and the sliding block moves along the axis of the screw rod to drive one end of the plunger to move in the plunger sleeve. According to the quantitative filling device, the position of the screw rod is fixed, the plunger of the plunger pump is driven by the sliding block to move to suck and discharge paste, in the process, the screw rod does not need to move, the sliding block only moves on the screw rod, extra space does not need to be provided for the sliding block, the space needed by work of the screw rod is effectively reduced, and the size of the quantitative filling device is reduced.

Description

Technical Field

[0001] The utility model belongs to the field of paste prescription packaging, and specifically relates to quantitative filling equipment of a paste prescription packaging machine and the paste prescription packaging machine. Background Art

[0002] The ointment packaging machine is a device used to package ointments according to set quantities. The ointment generally refers to Chinese medicine ointment, which is one of the eight dosage forms in traditional Chinese medicine: pills, powders, ointments, pills, wine, dew, soup, and tablets.

[0003] Quantitative filling equipment refers to equipment that accurately distributes the paste prescription in the medicine storage barrel according to the set dosage. This equipment determines whether the dosage of the paste prescription after packaging is accurate.

[0004] Chinese patent application number 202221884053.0 discloses a hot compress paste quantitative filling device, which uses a coaxial servo motor, a lead screw, and a plunger pump to complete the quantitative absorption and discharge of the hot compress paste. However, the coaxial servo motor, the lead screw, and the plunger pump will occupy a long longitudinal space, while the lateral space is mostly idle, which makes the space utilization rate low and even increases the volume.

[0005] In view of this, the present utility model is proposed. Utility Model Content

[0006] The utility model provides quantitative filling equipment of a paste prescription packaging machine and the paste prescription packaging machine, and aims to reduce the space occupied by the quantitative filling equipment and improve the space utilization rate of the quantitative filling equipment.

[0007] In order to solve the above technical problems, the basic concept of the technical solution adopted by the utility model is:

[0008] A quantitative filling device for a paste prescription packaging machine, comprising:

[0009] Fixed bottom plate;

[0010] A plunger pump is arranged on a fixed base plate and comprises a plunger sleeve and a plunger with one end movable in the plunger sleeve and the other end outside the plunger sleeve;

[0011] The lead screw has a screw rod and a slider threadedly connected to the screw rod. When the screw rod rotates, the slider moves along the axis of the screw rod.

[0012] The screw is arranged on a fixed bottom plate, and its axis is parallel to the axis of the plunger sleeve. The slider is connected to the plunger, and the slider moves along the axis of the screw to drive one end of the plunger to move in the plunger sleeve.

[0013] Furthermore, one side of the slider has a connecting piece protruding from the slider body, and the connecting piece is connected to one end of the plunger outside the plunger sleeve.

[0014] Furthermore, a guide rail is provided below the screw rod along the axis direction of the screw rod, and the sliding block is slidably connected to the guide rail.

[0015] Furthermore, the fixed base plate has two mounting bosses which are arranged opposite to each other and at intervals, and the two ends of the screw rod and the guide rail are respectively arranged on the two mounting bosses.

[0016] Furthermore, a plunger position sensor is provided on the fixed base plate at one side close to the plunger of the plunger pump, and the plunger position sensor can emit a detection signal for detecting the moving position of the plunger.

[0017] Furthermore, there are at least two plunger position sensors, which are respectively arranged at both ends of the screw rod and are used to detect whether the plunger reaches the corresponding position.

[0018] Further, the distance between the two plunger position sensors is the same as the maximum moving distance of one end of the plunger in the plunger sleeve.

[0019] Furthermore, the plunger position sensor comprises a plunger sensor transmitting end and a plunger sensor receiving end which are arranged opposite to each other and spaced apart from each other, and a positioning piece extending in the horizontal direction is arranged on the slider or the connecting piece or the plunger.

[0020] The positioning piece can move with the plunger to between the plunger sensor transmitting end and the plunger sensor receiving end, thereby preventing the plunger sensor receiving end from receiving the signal transmitted by the plunger sensor transmitting end.

[0021] Furthermore, the quantitative filling device also includes a limit plate arranged on the fixed bottom plate and parallel to the screw, and the two plunger position sensors are respectively arranged at both ends of the limit plate.

[0022] A paste prescription packaging machine comprises any of the quantitative filling devices described above.

[0023] After adopting the above technical scheme, the utility model has the following beneficial effects compared with the prior art.

[0024] 1. Connect the screw of the lead screw to the fixed base plate, fix the slider to the plunger of the plunger pump, and use the slider moving along the extension direction of the screw to drive the plunger to move, so as to complete the suction and discharge of the paste by the plunger pump. In this process, the screw does not need to move, only the slider needs to move along the screw, and no new space will be occupied when the screw moves, which effectively reduces the space required for the screw to work and reduces the volume of the quantitative filling equipment.

[0025] 2. A plunger position sensor is arranged along the extension direction of the screw to detect the stroke of the plunger pump to prevent the plunger of the plunger pump from being driven by the slider beyond the working stroke and causing damage to the plunger pump.

[0026] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation on the present invention. Obviously, the accompanying drawings described below are only some embodiments. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without creative work. In the accompanying drawings:

[0028] Figure 1 This is a schematic diagram of the quantitative filling equipment assembly of the paste prescription packaging machine of the utility model;

[0029] Figure 2 This utility model Figure 1 The enlarged view of point A in the middle;

[0030] Figure 3 This utility model Figure 1 Another angle diagram;

[0031] Figure 4 This utility model Figure 3 The enlarged view of point B in the middle;

[0032] Figure 5 It is a structural schematic diagram of a paste prescription packaging machine of the utility model.

[0033] In the figure: 1. plunger pump; 11. plunger; 12. plunger sleeve; 2. lead screw; 21. screw; 22. slider; 23. guide rail; 24. fixed boss; 25. second driven wheel; 26. connecting piece; 3. first motor; 31. first drive wheel; 4. three-way ball valve; 41. first driven wheel; 42. positioning plate; 421. notch; 43. valve core angle sensor; 431. valve core sensor transmitting end; 432. valve core sensor receiving end; 5. limit plate; 51. plunger position sensor; 511. plunger sensor transmitting end; 512. plunger sensor receiving end; 52. positioning plate; 6. fixed bottom plate; 7. second motor; 71. second drive wheel; 8. medicine storage barrel; 9. packaging equipment.

[0034] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but rather to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. The following embodiments are used to illustrate the utility model but are not used to limit the scope of the utility model.

[0036] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0037] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] The utility model proposes a Figures 1 to 4 The quantitative filling equipment of the paste packaging machine shown in the figure and Figure 5 The paste prescription packaging machine shown.

[0039] Paste prescription packaging machine is a device used to pack paste prescriptions according to the set amount. The paste prescription generally refers to Chinese medicine paste prescription, which is one of the eight dosage forms in traditional Chinese medicine: pills, powders, pastes, pills, wine, dew, soup, and tablets. Of course, this paste prescription packaging machine is not limited to Chinese medicine, but can also be used for Western medicine and Chinese and Western medicine, and there is no restriction on the applicable drugs.

[0040] Quantitative filling equipment refers to equipment that accurately distributes the paste prescription in the medicine storage barrel according to the set dosage. This equipment determines whether the dosage of the paste prescription after packaging is accurate.

[0041] like Figure 1 , Figure 2 As shown, the quantitative filling equipment includes:

[0042] Fixed bottom plate 6;

[0043] The plunger pump 1 is arranged on a fixed base plate 6 and comprises a plunger sleeve 12 and a plunger 11 with one end movable in the plunger sleeve 12 and the other end outside the plunger sleeve 12;

[0044] The lead screw 2 comprises a screw rod 21 and a slider 22 threadedly connected to the screw rod 21. When the screw rod 21 rotates, the slider 22 moves along the axis of the screw rod 21.

[0045] The screw rod 21 is arranged on the fixed base plate 6 , and its axis is parallel to the axis of the plunger sleeve 12 . The slider 22 is connected to the plunger 11 . The slider 22 moves along the axis of the screw rod 21 to drive one end of the plunger 11 to move in the plunger sleeve 12 .

[0046] The fixed base plate 6 is a flat, horizontally arranged metal plate, and other components can be mounted on the upper and lower surfaces of the fixed base plate 6 .

[0047] The screw 2 is preferably a ball screw 2, which can effectively improve transmission accuracy and reduce wear.

[0048] The plunger sleeve 12 of the plunger pump 1 is a cylindrical structure with outlets at both ends. Part or all of the plunger 11 is inside the plunger sleeve 12 and abuts against the inner peripheral side wall of the plunger sleeve 12. When the plunger 11 moves, the paste can be sucked in or discharged from one end of the plunger sleeve 12.

[0049] Specifically, the outlet at one end of the plunger sleeve 12 is the paste inlet and outlet for the paste to enter and exit, and the outlet at the other end is the plunger port for the movement of the plunger 11. When the plunger 11 moves away from the end of the paste inlet and outlet, the air pressure in the plunger sleeve 12 between the plunger 11 and the paste inlet and outlet decreases, and the paste from the medicine storage barrel 8 is sucked into the plunger sleeve 12 from the paste inlet and outlet; when the plunger 11 moves toward one end of the paste inlet and outlet, the plunger 11 squeezes the paste in the plunger sleeve 12, and discharges the paste in the plunger sleeve 12 into the packaging equipment 9, completing the packaging of the paste.

[0050] The slider 22 of the lead screw 2 is sleeved on the screw 21. When the screw 21 rotates, the slider 22 moves along the screw 21 under the action of the thread. The movement direction of the slider 22 along the screw 21 can be controlled by controlling the rotation direction of the screw 21, and then the plunger 11 fixedly connected to the slider 22 is controlled to move in the plunger sleeve 12 along the extension direction of the screw 21 (which is also the extension direction of the plunger sleeve 12), thereby realizing the plunger pump 1 to suck and discharge the paste.

[0051] In the utility model, the position of the screw 21 of the lead screw 2 is fixed, and the slider 22 is driven to move along the screw 21 by the rotation of the screw 21, and the slider 22 drives the plunger 11 of the plunger pump 1 to move to complete the suction and discharge of the paste. During this process, the screw 21 does not need to move, and the slider 22 only moves on the screw 21. There is no need to provide space beyond the length of the screw 21 for the lead screw 2 to drive the plunger 11, which effectively reduces the space required for the work of the lead screw 2 structure and reduces the volume of the quantitative filling equipment.

[0052] The screw 21 of the lead screw 2 is provided with a second driven wheel 25 at the end away from the plunger pump 1. The driving device also includes a second motor 7. A second driving wheel 71 is provided on the output shaft of the second motor 7. The second driving wheel 71 and the second driven wheel 25 are connected by a belt, and the second motor 7 provides power for the rotation of the screw 21.

[0053] A tensioning wheel is provided between the second driving wheel 71 and the second driven wheel 25 for tensioning the belt connecting the second driving wheel 71 and the second driven wheel 25 to reduce the friction between the belt and the second driving wheel 71 and the second driven wheel 25, so that the second motor 7 can drive the stroke of the plunger pump 1 more accurately.

[0054] Furthermore, the output shaft of the second motor 7 is parallel to the screw rod 21 , and the output shaft of the second motor 7 extends from the second driving wheel 71 to an end of the screw rod 21 where the second driven wheel 25 is not provided.

[0055] The second motor 7 and the lead screw 2 are both arranged on the same side of the second driving wheel 71 and the second driven wheel 25, which can effectively utilize the space perpendicular to the extension direction of the screw 21, reduce the space occupied in the extension direction of the screw 21, and reduce the volume of the quantitative filling equipment.

[0056] Furthermore, the second motor 7 uses a stepper motor, which can accurately control the rotation angle, realize accurate control of the rotation angle of the screw 21, and then accurately control the displacement of the slider 22, and finally realize the precise dosage of the paste inhaled and discharged by the plunger pump 1. Compared with the use of ordinary motors, the use of stepper motors can improve the accuracy of the paste dosage from 5%-15% to 2%.

[0057] As an embodiment of the present utility model, Figure 1 , Figure 2 As shown, one side of the slider 22 has a connecting piece 26 protruding from the slider 22 body, and the connecting piece 26 is connected to one end of the plunger 11 outside the plunger sleeve 12 .

[0058] The connecting member 26 connects the slider 22 and one end of the plunger 11 , and is fixed to the slider 22 and the plunger 11 using screws.

[0059] Furthermore, the second motor 7 is arranged on one side of the extending direction of the screw 21, and the plunger pump 1 is arranged on the other side of the extending direction of the screw 21, so as to avoid mutual interference between the two.

[0060] In this embodiment, the plunger pump 1 is arranged on one side of the extension direction of the screw 21, rather than being arranged coaxially with the screw 21, so that the plunger 11 is prevented from colliding with the screw 21 when moving with the slider 22, and the plunger 11 does not need to be specially designed to avoid the screw 21. At the same time, the plunger 11 and the screw 21 are partially staggered, further saving space in the extension direction of the screw 21.

[0061] As an implementation method of this embodiment, Figure 1 , Figure 2 As shown, there is a guide rail 23 arranged along the axial direction of the screw rod 21 below the screw rod 21, and the slider 22 is slidably connected to the guide rail 23.

[0062] The guide rail 23 can be set to have a "T"-shaped or "I"-shaped cross-section, and the slider 22 can be partially sleeved on the guide rail 23 and slide along the guide rail 23. The guide rail 23 with a "T"-shaped or "I"-shaped cross-section can increase the stability of the abutment between the slider 22 and the guide rail 23.

[0063] In this embodiment, the slider 22 moves under the action of the rotating screw 21. Since the screw 21 is rotating, it is not stable and may vibrate, resulting in unstable movement and synchronous vibration of the slider 22, which affects the working stability of the plunger pump 1. A guide rail 23 is provided along the extending direction of the screw 21, and the guide rail 23 can provide support for the slider 22, reduce the vibration of the slider 22 during movement, and thus stably move along the screw 21.

[0064] At the same time, when the screw 21 rotates, the friction between the screw 21 and the slider 22 will also make the slider 22 tend to rotate synchronously with the screw 21. If the slider 22 rotates with the screw 21, the slider 22 will not be able to move along the direction of the screw 21. The guide rail 23 abutting against the slider 22 can also offset the friction between the slider 22 and the screw 21, so that the slider 22 cannot rotate with the screw 21, ensuring that the slider 22 can move along the extension direction of the screw 21.

[0065] Furthermore, the slider 22 includes an upper block and a lower block, wherein the upper block is sleeved on the screw rod 21 and is threadedly connected to the screw rod 21, and the lower block abuts against the slide rail and can move along the slide rail. The upper block and the lower block are fixedly connected by screws or rivets.

[0066] Furthermore, if Figure 1 , Figure 2 As shown, the fixed base plate 6 has two mounting bosses 24 that are opposite to each other and spaced apart, and the two ends of the screw rod 21 and the guide rail 23 are respectively disposed on the two mounting bosses 24 .

[0067] The fixing boss 24 is connected to the fixing base plate 6 by screws. The fixing boss 24 includes two detachable upper and lower layers. Both ends of the guide rail 23 are connected to the lower layer, and both ends of the screw rod 21 are connected to the upper layer.

[0068] Furthermore, the extending directions of the screw rod 21 and the plunger sleeve 12 are both arranged in the horizontal direction, parallel to the fixed bottom plate 6, and the guide rail 23 abutting against the slider 22 is also arranged in the horizontal direction.

[0069] The two ends of the screw rod 21 are fixed by two fixing bosses 24, which ensures that the screw rod 21 will not move in its extension direction and does not affect the rotation of the screw rod 21. The screw rod 21 and the guide rail 23 are connected to the fixing bosses 24, so that the extension directions of the guide rail 23 and the screw rod 21 are kept consistent, so that the slider 22 can move smoothly under the dual action of the screw rod 21 and the guide rail 23.

[0070] As another implementation of this embodiment, Figure 1 , Figure 2 As shown, a plunger position sensor 51 is provided on the fixed base plate 6 , close to the side of the plunger 11 of the plunger pump 1 , and the plunger position sensor 51 can emit a detection signal for detecting the moving position of the plunger 11 .

[0071] The plunger position sensor 51 can effectively detect the position of the plunger 11 and prevent the lead screw 2 from pulling the plunger 11 too far to damage the plunger pump 1 .

[0072] Furthermore, there are at least two plunger position sensors 51, which are respectively disposed at both ends of the screw rod 21, and are used to detect whether the plunger 11 reaches the corresponding position.

[0073] Specifically, the two plunger position sensors 51 are arranged on the fixed base plate 6 , and the plunger position sensor 51 close to the plunger sleeve 12 is opposite to the connecting piece 26 connecting the slide block 22 and the plunger 11 in a direction perpendicular to the extension of the plunger pump 1 .

[0074] In this embodiment, the plunger position sensor 51 can monitor the position of the slider 22 or the plunger 11, and then feedback the position of the plunger 11 during the filling process of the paste, and adjust the operation of the second motor 7, thereby ensuring that the filling can be completed and the plunger pump 1 is not damaged.

[0075] Furthermore, the distance between the two plunger position sensors 51 is the same as the maximum moving distance of the plunger 11 in the plunger sleeve 12 .

[0076] Specifically, one plunger position sensor 51 is opposite to the position of the connector 26 when the plunger 11 completely enters the plunger sleeve 12 , and the other plunger position sensor 51 is opposite to the position of the connector 26 when the plunger 11 moves to the limit outside the plunger sleeve 12 .

[0077] The plunger 11 completely entering the plunger sleeve 12 means that the plunger 11 moves to the limit position in the plunger sleeve 12 and cannot move further. At this time, the space in the plunger sleeve 12 that can accommodate the paste is the smallest. It does not mean that the plunger 11 body is completely immersed in the plunger sleeve 12 with no exposed part.

[0078] The plunger 11 moves to the limit outside the plunger sleeve 12, which means that the plunger 11 is pulled out of the plunger sleeve 12 to the limit position. At this time, the space in the plunger sleeve 12 that can accommodate the paste is the largest, and the plunger 11 does not separate from the plunger sleeve 12. The plunger 11 can still abut against the inner side wall of the plunger sleeve 12 to maintain an airtight state.

[0079] Generally speaking, the maximum moving distance of the plunger 11 in the plunger sleeve 12 is smaller than the total length of the plunger sleeve 12 .

[0080] Two plunger position sensors 51 for detecting the position of the slider 22 or the plunger 11 can feedback the actual position of the slider 22 or the plunger 11. When the slider 22 or the plunger 11 moves to the extreme positions at both ends of the stroke, the plunger position sensor 51 can detect the position of the slider 22 or the plunger 11 and provide feedback to avoid the plunger 11 being pulled out of the plunger sleeve 12 or the plunger 11 and the plunger sleeve 12 colliding and damaging the plunger pump 1 when the second motor 7 is controlled incorrectly.

[0081] Alternatively, a distance sensor that can detect the moving distance of the slider 22 or the plunger 11 can be set on the fixed base plate 6 to provide real-time feedback on the moving distance of the slider 22 or the plunger 11, thereby monitoring the entire working process of the plunger pump 1.

[0082] Furthermore, if Figure 1 , Figure 2 As shown, the plunger position sensor 51 includes a plunger sensor transmitting end 511 and a plunger sensor receiving end 512 which are arranged opposite to each other and spaced apart from each other. A positioning piece 52 extending in the horizontal direction is arranged on the slider 22 or the connecting member 26 or the plunger 11.

[0083] The positioning piece 52 can move with the plunger 11 to between the plunger sensor transmitting end 511 and the plunger sensor receiving end 512 , thereby preventing the plunger sensor receiving end 512 from receiving the signal transmitted by the plunger sensor transmitting end 511 .

[0084] Preferably, the positioning piece 52 is fixed to the connecting member 26 by screws;

[0085] Preferably, the plunger position sensor 51 is a photoelectric sensor;

[0086] The plunger sensor transmitting end 511 and the plunger sensor receiving end 512 can be arranged such that the plunger sensor transmitting end 511 is on top and the plunger sensor receiving end 512 is on the bottom, or the plunger sensor receiving end 512 is on top and the plunger sensor transmitting end 511 is on the bottom. The accompanying drawings only show one of the situations.

[0087] The plunger sensor transmitting end 511 of the plunger position sensor 51 transmits light to the plunger sensor receiving end 512, and the plunger sensor receiving end 512 receives the light. When the positioning piece 52 that moves with the slider 22 moves between the plunger sensor transmitting end 511 and the plunger sensor receiving end 512, the light emitted by the plunger sensor transmitting end 511 is blocked by the positioning piece 52 and cannot be received by the plunger sensor receiving end 512, so that the signal of the plunger position sensor 51 changes, thereby realizing the position detection of the slider 22 and the plunger 11.

[0088] Furthermore, if Figure 1 , Figure 2 As shown, the positioning piece 52 is arranged on the connecting member 26 , and the positioning piece 52 is extended toward the fixed base plate 6 and then bent, and is extended toward between the plunger sensing transmitting end 511 and the plunger sensing receiving end 512 of the plunger position sensor 51 .

[0089] The positioning piece 52 extends toward the fixed base plate 6 and is as close to the fixed base plate 6 as possible, so that the position of the plunger position sensor 51 relative to the fixed base plate 6 can be as low as possible, which not only reduces the used space, but also can avoid the positioning piece 52 being interfered by other components during movement.

[0090] Furthermore, the quantitative filling device further comprises a limit plate 5 which is arranged on the fixed bottom plate 6 and is parallel to the screw 21 , and the two plunger position sensors 51 are respectively arranged at two ends of the limit plate 5 .

[0091] Specifically, the limit plate 5 includes a base plate extending along the extension direction of the screw rod 21, the base plate is horizontally arranged and fixed to the upper surface of the fixed base plate 6. The limit plate 5 also includes a side plate connected to the side of the base plate, the side plate is extended along the extension direction of the screw rod 21 and is perpendicular to the fixed base plate 6. The two plunger position sensors 51 are arranged on the side plate, and the base plate is fixed to the fixed base plate 6 by screws.

[0092] The two plunger position sensors 51 are set on the limit plate 5, and the distance between the two plunger position sensors 51 is determined by the length of the limit plate 5 itself. During installation, there is no need to accurately measure the distance between the two plunger position sensors 51. It is only necessary to install the limit plate 5 on the fixed base plate 6, which simplifies the installation steps.

[0093] As another embodiment of the present utility model, Figures 1 to 4As shown, the paste filling device also includes a three-way ball valve 4 connected to the plunger pump 1, and the three-way ball valve 4 includes a valve body with three valve ports and a valve core with an L-shaped channel. The three valve ports of the valve body are in a "T" shape, and the valve core is spherical and can rotate in the valve body to connect any two adjacent valve ports.

[0094] Preferably, the three valve ports of the valve body are respectively arranged upward, horizontally and downwardly, the horizontally facing valve port is connected to the plunger pump 1 , the upward valve port is connected to the medicine storage barrel 8 , and the downward valve port is connected to the packaging equipment 9 .

[0095] Preferably, the valve core is made of ceramic material, which can greatly avoid the influence of temperature on the rotation of the valve core and the sealing between the valve core and the valve body, and avoid the expansion of the valve core and the jamming of the valve body when the temperature is high, and the contraction of the valve core when the temperature is low, causing the paste to leak between the valve core and the valve body.

[0096] When the valve core rotates to connect the upward and horizontal valve ports, the plunger pump 1 is connected to the medicine storage barrel 8, and the second motor 7 is controlled to rotate, so that the slider 22 moves away from the plunger sleeve 12, driving the plunger 11 to be pulled out of the plunger sleeve 12 and sucking the paste into the plunger sleeve 12. When the inhaled paste reaches a predetermined amount, the second motor 7 is controlled to stop rotating. The valve core is rotated to connect the two horizontal and downward valve ports. At this time, the plunger pump 1 is connected to the packaging equipment 9. The second motor 7 is controlled to rotate in the opposite direction, so that the slider 22 moves toward the plunger sleeve 12, driving the plunger 11 to move into the plunger sleeve 12, and discharging the paste out of the plunger sleeve 12, and discharging it into the packaging equipment 9 through the three-way valve. The discharge is completed and the medicine is packaged as a medicine bag.

[0097] Furthermore, the valve core includes a valve handle perpendicular to the rotation direction of the valve core, and a first driven wheel 41 is provided at the end of the valve handle. The quantitative filling device includes a first motor 3 whose output shaft is perpendicular to the extension direction of the plunger sleeve 12, and a first driving wheel 31 is provided at the end of the output shaft of the first motor 3, and the first driving wheel 31 is connected to the first driving wheel 31 through a belt. A tensioning wheel is provided between the first driving wheel 31 and the first driven wheel 41 to tension the belt connecting the first driving wheel 31 and the first driven wheel 41.

[0098] like Figure 3 , Figure 4 As shown, the end of the valve handle is also provided with a positioning plate 42 that rotates coaxially with the valve handle, and two notches 421 are provided on the edge of the positioning plate 42. The two notches 421 are arranged at two adjacent quarter points on the edge of the positioning plate 42, and the valve core sensor transmitting end 431 and the valve core sensor receiving end 432 of the valve core angle sensor 43 are respectively provided on both sides of the positioning plate 42.

[0099] When the disc rotates to the point where the notch 421 is located between the valve core sensor emitting end 431 and the valve core sensor receiving end 432, the light emitted by the valve core sensor emitting end 431 can be received by the valve core sensor receiving end 432; when the notch 421 leaves the point between the valve core sensor emitting end 431 and the valve core sensor receiving end 432, the light emitted by the valve core sensor emitting end 431 is blocked by the positioning disc 42 and cannot be received by the valve core sensor receiving end 432, so that the valve handle can be detected by the valve core rotation angle sensor 43 when it is rotated to 90°.

[0100] The positions of the valve core sensor transmitting end 431 and the valve core sensor receiving end 432 can be interchanged, and the figure only shows one case.

[0101] The valve core switches from the state of connecting the plunger pump 1 and the medicine storage barrel 8 to the state of connecting the plunger pump 1 and the packaging equipment 9. The valve core needs to be rotated 90°. The rotation angle of the valve core can be fed back through the cooperation between the positioning plate 42 with a notch 421 and the valve core rotation angle sensor 43 to ensure that the rotation angle is correct.

[0102] Preferably, the first motor 3 is a component motor, which can accurately control the rotation angle compared to an ordinary motor.

[0103] Preferably, the valve core angle sensor 43 is a photoelectric sensor.

[0104] The utility model also proposes a Figure 5 The paste prescription packaging machine shown includes the quantitative filling device of the utility model. The paste prescription packaging machine also includes a medicine storage barrel 8 arranged above the quantitative filling device and a packaging machine arranged below the quantitative filling device. The plunger pump 1 of the quantitative filling device extracts a preset dose of the paste prescription from the upper medicine storage barrel 8 each time, and then discharges it into the packaging device 9 to be packaged into a medicine bag.

[0105] The paste prescription packaging machine includes a preset control system, which includes a plunger pump 1 control subsystem, a temperature control subsystem, a packaging quantity control subsystem, a heating control subsystem, a display control subsystem, and a safety control subsystem, wherein:

[0106] Function of the plunger pump 1 control subsystem: By controlling the forward and reverse rotation of the second motor 7 and the forward and reverse rotation of the first stepper motor, the mechanical transmission of the lead screw 2 is driven, and the on and off directions of the three-way ball valve 4 are controlled, so as to realize the suction and output of the plunger pump 1 with precise packaging dosage.

[0107] Function of the temperature control subsystem: To control the temperature of the sealing module during the packaging process and ensure that the sealing is carried out within the specified temperature range. If the temperature is too high, the PE film of the packaging paste will melt, and if the temperature is too low, the PE film cannot be sealed.

[0108] Functions of the packaging quantity control subsystem: Set the number of packaging bags, packaging dosage, and the packaging gear is manually adjustable. Each gear has a fine-tuning function, which is suitable for packaging pastes with different viscosities to meet the packaging needs of different pastes.

[0109] Function of the heating control subsystem: Control the opening and closing of the heating water bath module to control the temperature of the paste during the packaging process, and ensure that the paste is packaged with a stable viscosity within the specified temperature range. Too high or too low temperature will affect the viscosity, and then affect the packaging dosage accuracy. The medicine storage barrel 8 includes a water bath module for controlling the temperature of the paste.

[0110] Functions of the display control subsystem: realize human-computer interaction, set the temperature and time of the paste packaging machine, and display packaging parameters.

[0111] Function of network communication subsystem: through network communication, the communication between paste prescription production equipment and decoction center software can be realized. The decoction center software can realize remote control of paste prescription packaging machine, and can also realize remote control of multiple paste prescription packaging machines.

[0112] Safety control subsystem: ensures the absolute safety of the paste packaging machine during its working process, and realizes functions such as leakage suspension and alarm.

[0113] In the utility model, the paste prescription packaging machine improves the space utilization rate, effectively reduces the volume, and improves the filling accuracy of the medicine package dosage.

[0114] The above is only a preferred embodiment of the present invention, and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technician familiar with this patent can make some changes or modifications to equivalent embodiments of equivalent changes using the technical content suggested above without departing from the scope of the technical solution of the present invention. The implementation schemes in the above embodiments can also be further combined or replaced. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the present invention.

Claims

1. A quantitative filling device for a paste prescription packaging machine, comprising: Fixed bottom plate (6); A plunger pump (1) is arranged on a fixed base plate (6) and comprises a plunger sleeve (12) and a plunger (11) with one end movable in the plunger sleeve (12) and the other end outside the plunger sleeve (12); The lead screw (2) comprises a screw rod (21) and a slider (22) threadedly connected to the screw rod (21), and when the screw rod (21) rotates, the slider (22) moves along the axis of the screw rod (21); The invention is characterized in that: the screw rod (21) is arranged on a fixed base plate (6), and its axis is parallel to the axis of the plunger sleeve (12); the slider (22) is connected to the plunger (11); the slider (22) moves along the axis of the screw rod (21) to drive one end of the plunger (11) to move in the plunger sleeve (12).

2. The quantitative filling device of the paste prescription packaging machine according to claim 1 is characterized in that: One side of the slider (22) has a connecting piece (26) protruding from the slider (22) body, and the connecting piece (26) is connected to one end of the plunger (11) outside the plunger sleeve (12).

3. The quantitative filling equipment of the paste prescription packaging machine according to claim 1 or 2, characterized in that: A guide rail (23) is provided below the screw rod (21) and is arranged along the axial direction of the screw rod (21), and the sliding block (22) is slidably connected to the guide rail (23).

4. The quantitative filling device of the paste prescription packaging machine according to claim 3 is characterized in that: The fixed base plate (6) is provided with two mounting bosses (24) which are arranged opposite to each other and at intervals, and the two ends of the screw rod (21) and the guide rail (23) are respectively arranged on the two mounting bosses (24).

5. The quantitative filling equipment of the paste prescription packaging machine according to claim 1 or 2, characterized in that: A plunger position sensor (51) is provided on the fixed base plate (6) on a side close to the plunger (11) of the plunger pump (1). The plunger position sensor (51) can emit a detection signal for detecting the moving position of the plunger (11).

6. The quantitative filling device of the paste prescription packaging machine according to claim 5, characterized in that: There are at least two plunger position sensors (51), which are respectively arranged at both ends of the screw rod (21) and are used to detect whether the plunger (11) has reached a corresponding position.

7. The quantitative filling device of the paste prescription packaging machine according to claim 6, characterized in that: The distance between the two plunger position sensors (51) is the same as the maximum moving distance of one end of the plunger (11) in the plunger sleeve (12).

8. The quantitative filling equipment of the paste prescription packaging machine according to claim 6 or 7, characterized in that: The plunger position sensor (51) comprises a plunger sensor transmitting end (511) and a plunger sensor receiving end (512) which are arranged opposite to each other and spaced apart from each other. A positioning piece (52) extending in a horizontal direction is arranged on the slider (22) or the connecting piece (26) or the plunger (11). The positioning piece (52) can move with the plunger (11) to between the plunger sensor transmitting end (511) and the plunger sensor receiving end (512), thereby preventing the plunger sensor receiving end (512) from receiving the signal emitted by the plunger sensor transmitting end (511).

9. The quantitative filling equipment of the paste prescription packaging machine according to claim 6 or 7, characterized in that: The quantitative filling device further comprises a limit plate (5) arranged on the fixed bottom plate (6) and parallel to the screw (21), and the two plunger position sensors (51) are respectively arranged at both ends of the limit plate (5).

10. A paste prescription packaging machine, characterized in that: The invention comprises the quantitative filling equipment as described in any one of claims 1 to 9.

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