Liquid material dispensing system

Abstract

This invention relates to the field of liquid feeding technology and discloses a liquid feeding system. The shaft hole is connected to two slots, and a fixed shaft is movably inserted into the shaft hole. A U-shaped frame is fixedly connected to the top of the support plate on the front side of the U-shaped pressure rod. A connecting shaft is movably connected to the inner side of the U-shaped frame, and a pressure block is fixedly sleeved on the outer side of the connecting shaft. Compared to manually opening and closing the BIB valve, this invention achieves complete automation. The opening and closing actions of the BIB valve are achieved by the forward and reverse rotation of the motor output shaft. Both the fully open and fully closed positions are triggered by two microswitches triggered by a boss at one end of the connecting shaft, which can stop the motor rotation while ensuring that the motor does not over-rotate. Furthermore, the self-locking characteristics of the worm gear and worm ensure that the U-shaped pressure rod remains in the pressed or raised state. The state of the microswitches can also determine whether the valve is open or closed. The next time the motor is started, it corresponds to the forward and reverse rotation of the motor, achieving an open-close function.

Description

Technical Field

[0001] This invention relates to the field of liquid feeding technology, specifically to a liquid feeding system. Background Technology

[0002] BIB bag valves are currently widely used in the beverage production and retail industry for storing fruit juice, wine, dairy products, coffee extract, tea concentrate, etc. The patent describes that the product can be stored at room temperature for 2 to 3 years without being opened, and can be stored at room temperature for 2 months without deterioration after being opened, thus achieving a product lifespan close to the shelf life.

[0003] Currently, BIB (Bubble Intake) bags are widely used in coffee shops and beverage retail stores, mostly employing a manual method of lifting the valve flaps on both sides to open the valve and dispense the liquid. However, this method of manually pressing the flaps to open the BIB bag valve is not suitable for fully automatic intelligent fresh beverage machines. Furthermore, some beverage machines use a method where the BIB bag opening is always open, connected to a flexible hose of equal diameter, and dispensed using a peristaltic pump. However, because the liquid flow path includes unsterilized tubing, the surface area of ​​the liquid exposed to air is increased. The fact that the BIB bag opening is always open negates the advantages of the valve, allowing outside air to easily enter the storage bag, which can easily cause the sugar- and protein-rich storage liquid to spoil, turn sour, or even rot. Therefore, a liquid dispensing system is proposed. Summary of the Invention

[0004] The purpose of this invention is to provide a liquid dispensing system to address the issues raised in the background art. Currently, most liquid dispensing methods used in coffee shops and beverage retail stores involve manually pulling the valve flaps on both sides to open the valve. However, this method of manually pressing the flaps to open the BIB bag valve is not suitable for fully automatic intelligent fresh beverage machines. Furthermore, some beverage machines use a method where the BIB bag opening is always open, connected to a flexible hose of equal diameter, and a peristaltic pump for dispensing. However, because the liquid flow path includes an unsterilized pipeline, the contact area between the liquid and air is increased. The always-open BIB bag opening essentially negates the advantages of the BIB bag valve, allowing outside air to enter the storage bag in reverse, easily causing the sugar- and protein-rich storage liquid to deteriorate, become sour, or even rot.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a liquid material feeding system, including a support plate, a fixed frame fixedly connected to the top of the support plate, a first placement groove provided at the top of the fixed frame, a through groove provided at the bottom of the first placement groove, guide holes provided on both sides of the through groove at the bottom of the first placement groove, a top column placed inside the guide hole, two slots provided on the front side of the fixed frame, the two slots respectively communicating with the two guide holes, the two ends of a U-shaped pressure rod movably inserted into the two slots, the two ends of the U-shaped pressure rod respectively inserted into the two guide holes and respectively located below the two top columns, a shaft hole provided on the right side of the fixed frame, the shaft hole respectively communicating with the two slots, a fixed shaft movably inserted into the shaft hole, a U-shaped frame fixedly connected to the top of the support plate in front of the U-shaped pressure rod, a connecting shaft movably connected to the inner side of the U-shaped frame, and a pressure block fixedly sleeved on the outer side of the connecting shaft.

[0006] As a further preferred embodiment of this technical solution: one end of the connecting shaft extends to one side of the U-shaped frame and a boss is fixedly sleeved on one end; two microswitches are installed on one side of the U-shaped frame.

[0007] As a further preferred embodiment of this technical solution: the top of the support plate is fixedly connected to a housing on the other side of the U-shaped frame, the other end of the connecting shaft extends to the other side of the U-shaped frame and is movably inserted into the interior of the housing, the other end of the connecting shaft is fixedly connected to a worm gear, a worm is movably connected inside the housing, the worm is meshed with the outside of the worm gear, the top of the support plate is fixedly connected to a motor at one end of the housing, and the output shaft of the motor is fixedly connected to the end of the worm extending to the outside of the housing.

[0008] As a further preferred embodiment of this technical solution: the top of the fixing frame is provided with mounting holes on both sides of the first placement slot, and a connecting column is installed inside the mounting hole. One end of a limiting plate is movably sleeved on the outer side of one of the connecting columns, and a slot is provided on the outer side of the other end of the limiting plate. The slot matches the other connecting column.

[0009] As a further preferred embodiment of this technical solution: the fixing frame has first insertion holes on both the left and right sides, and a first limiting post is inserted into the two first insertion holes. One end of each of the two first limiting posts passes through the outer end of the connecting post.

[0010] As a further preferred embodiment of this technical solution: a second insertion hole is provided at one end of the front side of the fixing frame, a second limiting post is inserted into the second insertion hole, and one end of the second limiting post is movably extended to the other end of the fixing shaft.

[0011] As a further preferred embodiment of this technical solution: a limiting groove is provided at the top of the fixing frame, and a first annular protrusion on the outside of the BIB valve is provided inside the limiting groove. One end of the BIB valve is inserted into the inside of the through groove, and the two side wing plates of the BIB valve respectively abut against the bottom of the first placement groove and are located above the top column.

[0012] As a further preferred embodiment of this technical solution: two connecting plates are fixedly connected to the top end of the support plate away from the U-shaped frame; a bearing column is slidably connected between the two connecting plates; a fixing plate is fixedly connected above the bearing column between the two connecting plates; a sliding column is fixedly connected to the bottom of each of the two fixing plates; one end of each sliding column movably passes through both ends of the top of the bearing column; one end of each sliding column is fixedly connected to the top of the support plate; a second placement groove is provided on the bearing column; a tension spring is movably sleeved on the outer side of the sliding column between the bearing column and the fixing plate; one end of the tension spring is fixedly connected to the top of the bearing column; and the other end of the tension spring is fixedly connected to the bottom of the fixing plate.

[0013] As a further preferred embodiment of this technical solution: a fixing tube is provided at the bottom of the support plate, and the second annular protrusion on the outside of the BIB valve is placed inside the second placement groove.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] Compared to manually opening and closing the BIB valve, this invention achieves full automation. The opening and closing of the BIB valve is achieved by the forward and reverse rotation of the motor output shaft. The opening and closing of the valve are both completed by two microswitches triggered by the boss at one end of the connecting shaft, which can stop the motor rotation while ensuring that the motor does not rotate excessively. Moreover, the self-locking characteristics of the worm gear and worm can also ensure that the U-shaped pressure rod remains in the pressed or raised state. At the same time, the state of the microswitches can be used to determine whether the valve is in the open or closed state. When the motor is started again, it corresponds to the forward and reverse rotation of the motor to realize the function of opening and closing.

[0016] This device adopts a completely contactless design without the need for an additional extraction pump. The BIB valve is suspended and located at the lowest end, with the discharge port of the BIB valve directly facing the cup. After the BIB valve is opened, the liquid in the liquid bag can be directly discharged into the cup under the action of gravity, completely eliminating any hygiene risks.

[0017] The opening and closing mechanism of this device fully aligns with the advantages of using BIB valves. When the BIB valve is closed, it ensures the isolation of the liquid inside the bag from the outside environment, guaranteeing the shelf life of the liquid. It also maintains the shelf life of the liquid inside the bag before and after opening, while ensuring the normal operation of the BIB valve.

[0018] By pushing the limiting plate to rotate, the limiting plate rotates around one of the connecting columns, causing the slot to disengage from the outside of the other connecting column. At this time, the tension spring pushes the bearing column upward, causing the first annular protrusion on the outside of the BIB valve to disengage from the inside of the limiting groove. The bearing column lifts the BIB valve, making it easier to remove and disassemble. When the BIB valve needs to be installed, by placing the second annular protrusion on the outside of the BIB valve into the second placement groove, the BIB valve is pushed downward. The bearing column moves outside the sliding column, causing the first annular protrusion on the outside of the BIB valve to fall into the inside of the limiting groove, thus completing the positioning and installation of the BIB valve and greatly improving the convenience of installation. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the top column structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the fixing frame structure of the present invention;

[0022] Figure 3 This is a schematic diagram of the limiting plate structure of the present invention;

[0023] Figure 4 This is a schematic diagram of the cross-sectional structure of the housing of the present invention;

[0024] Figure 5 This is a schematic diagram of the load-bearing column structure of the present invention;

[0025] Figure 6 This is a schematic diagram of the second placement slot structure of the present invention.

[0026] Explanation of reference numerals in the attached drawings: 1. Support plate; 2. Fixing frame; 3. First placement slot; 4. Through slot; 5. Guide hole; 6. Top column; 7. Slot; 8. U-shaped pressure rod; 9. Shaft hole; 10. Fixing shaft; 11. U-shaped frame; 12. Connecting shaft; 13. Pressure block; 14. Boss; 15. Micro switch; 16. Housing; 17. Worm gear; 18. Worm; 19. Motor; 20. Mounting hole; 21. Connecting column; 22. Limiting plate; 23. Slot; 24. First insertion hole; 25. First limiting column; 26. Second insertion hole; 27. Second limiting column; 28. Limiting slot; 29. ​​Connecting plate; 30. Bearing column; 31. Fixing plate; 32. Sliding column; 33. Tension spring; 34. Second placement slot; 35. BIB valve; 36. Fixing pipe. Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] It should be noted that the structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only used to complement the content disclosed in the specification for those skilled in the art to understand and read, and are not intended to limit the conditions under which this application can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and purposes that this application can produce, should still fall within the scope of the technical content disclosed in this application. Example

[0029] In existing technologies, most beverage retail stores and coffee shops use a manual method of pulling the valve flaps on both sides to open the valve and dispense the liquid. However, this method of manually pressing the flaps to open the BIB bag valve is not suitable for fully automatic intelligent fresh beverage machines. At the same time, some beverage machines use a method where the BIB bag opening is always open and connected to a hose of equal diameter, using a peristaltic pump to dispense the liquid. However, because the liquid flow path includes a pipeline that has not been strictly sterilized, the surface area of ​​the liquid in contact with air is increased. The fact that the BIB bag opening is always open means that the advantages of the BIB bag valve are abandoned. Outside air can completely enter the storage bag in reverse, which can easily cause the sugar and protein-rich storage liquid to deteriorate, turn sour, or even rot.

[0030] Please see Figure 1-6This invention provides a technical solution: a liquid material feeding system, including a support plate 1, a fixed frame 2 fixedly connected to the top of the support plate 1, a first placement groove 3 on the top of the fixed frame 2, a through groove 4 at the bottom of the first placement groove 3, guide holes 5 on both sides of the through groove 4 at the bottom of the first placement groove 3, and top posts 6 placed inside the guide holes 5. Two slots 7 are opened on the front side of the fixed frame 2, each slot 7 communicating with the two guide holes 5. The two ends of a U-shaped pressure rod 8 are movably inserted into the two slots 7, with the two ends of the U-shaped pressure rod 8 inserted into the two guide holes 5 and located below the two top posts 6. A shaft hole 9 is opened on the right side of the fixed frame 2, communicating with the two slots 7. A fixed shaft 10 is movably inserted into the shaft hole 9. A U-shaped frame 11 is fixedly connected to the top of the support plate 1 in front of the U-shaped pressure rod 8, and a connecting shaft 10 is movably connected to the inner side of the U-shaped frame 11. Shaft 12, with a pressure block 13 fixedly sleeved on the outer side of the connecting shaft 12. The top of the fixing frame 2 has a limiting groove 28, and the inside of the limiting groove 28 has a first annular protrusion on the outer side of the BIB valve 35. One end of the BIB valve 35 is inserted into the inside of the through groove 4. The two side wings of the BIB valve 35 respectively abut against the bottom of the first placement groove 3 and are located above the top column 6. The connecting shaft 12 drives the pressure block 13 to rotate, so that one end of the pressure block 13 pushes one end of the U-shaped pressure rod 8 to move downward. At the same time, the connecting shaft 12 drives the boss 14 to rotate. When the boss 14 abuts against the outside of a micro switch 15, that is, the motor 19 stops running. During this process, the U-shaped pressure rod 8 rotates around the fixed shaft 10. The other two ends of the U-shaped pressure rod 8 push the top column 6 to move inside the guide hole 5, so that the top column 6 pushes the two side wings of the BIB valve 35 to move upward, and the BIB valve 35 can be opened for use.

[0031] When the discharged liquid reaches the specified amount, the connecting shaft 12 drives the pressure block 13 to rotate and reset. When the pressure block 13 disengages from one end of the U-shaped pressure rod 8, the other two ends of the U-shaped pressure rod 8 are lifted by the gravity of the top column 6. At this time, the top column 6 disengages from the bottom of the wing plate of the BIB valve 35. When the pressure at the bottom of the wing plate of the BIB valve 35 is released, the wing plate of the BIB valve 35 resets, and the BIB valve 35 closes.

[0032] One end of the connecting shaft 12 extends to one side of the U-shaped frame 11, and a boss 14 is fixedly sleeved on one end. Two microswitches 15 are installed on one side of the U-shaped frame 11. Compared with manually opening / closing the BIB valve 35, the present invention achieves full automation. The opening and closing action of the BIB valve 35 is realized by the forward and reverse rotation of the output shaft of the motor 19. The two microswitches 15 are triggered by the boss 14 at one end of the connecting shaft 12 to complete the opening and closing actions, which can stop the motor 19 from rotating, while ensuring that the motor 19 does not rotate.

[0033] The top of the support plate 1 is fixedly connected to the housing 16 on the other side of the U-shaped frame 11. The other end of the connecting shaft 12 extends to the other side of the U-shaped frame 11 and is movably inserted into the inside of the housing 16. The other end of the connecting shaft 12 is fixedly connected to the worm gear 17. The inside of the housing 16 is movably connected to the worm 18, which is meshed with the outside of the worm gear 17. The top of the support plate 1 is fixedly connected to one end of the housing 16. The output shaft of the motor 19 is fixedly connected to the end of the worm 18 that extends to the outside of the housing 16. The self-locking characteristics of the worm gear 17 and the worm 18 can also ensure that the U-shaped pressure rod 8 is kept in the pressed or raised state. At the same time, the state of the micro switch 15 can be used to determine whether the valve is in the open or closed state. When the motor 19 is started again, it corresponds to the forward and reverse rotation of the motor 19 to realize the function of opening and closing.

[0034] The top of the fixing frame 2 has mounting holes 20 on both sides of the first placement slot 3. A connecting post 21 is installed inside the mounting hole 20. One end of a limiting plate 22 is movably sleeved on the outside of one of the connecting posts 21. A slot 23 is opened on the outside of the other end of the limiting plate 22. The slot 23 matches the other connecting post 21. The left and right sides of the fixing frame 2 have first insertion holes 24. A first limiting post 25 is inserted into the inside of each of the two first insertion holes 24. One end of each of the two first limiting posts 25 passes through the outside of the connecting post 21, and the connecting post 21 is limited by the first limiting post 25. A second insertion hole 26 is opened at the front end of the fixing frame 2. A second limiting post 27 is inserted into the inside of the second insertion hole 26. One end of the second limiting post 27 is movably extended out to the other end of the fixed shaft 10, and the position of the fixed shaft 10 is limited by the second limiting post 27.

[0035] Two connecting plates 29 are fixedly connected to the top of the support plate 1, away from the U-shaped frame 11. A bearing column 30 is slidably connected between the two connecting plates 29. A fixing plate 31 is fixedly connected above the bearing column 30 between the two connecting plates 29. A sliding column 32 is fixedly connected to the bottom of each of the two fixing plates 31. One end of each sliding column 32 extends through the top two ends of the bearing column 30. One end of each sliding column 32 is fixedly connected to the top of the support plate 1. A second placement groove 34 is provided on the bearing column 30. A tension spring 33 is movably sleeved on the outer side of the sliding column 32 between the bearing column 30 and the fixing plate 31. One end of the tension spring 33 is fixedly connected to the bearing column 1. The top of the support column 30 and the other end of the tension spring 33 are fixedly connected to the bottom of the fixing plate 31. The bottom of the support plate 1 is provided with a fixing tube 36. The second annular protrusion on the outside of the BIB valve 35 is placed inside the second placement groove 34. By pushing the limiting plate 22 to rotate, the limiting plate 22 rotates around one of the connecting columns 21 as the center, so that the groove 23 is disengaged from the outside of the other connecting column 21. At this time, the tension spring 33 pushes the support column 30 to move upward, so that the first annular protrusion on the outside of the BIB valve 35 is disengaged from the inside of the limiting groove 28. The support column 30 raises the BIB valve 35, making it convenient to remove and disassemble the BIB valve 35.

[0036] When BIB valve 35 needs to be installed, by placing the second annular protrusion on the outside of BIB valve 35 inside the second placement groove 34, BIB valve 35 is pushed downward to move. By moving the bearing column 30 outside the sliding column 32, the first annular protrusion on the outside of BIB valve 35 falls into the limiting groove 28, thus completing the positioning and installation of BIB valve 35 and greatly improving the convenience of installation.

[0037] Working principle or structural principle: During use, the motor 19 is started by controlling the switch group. The output shaft of the motor 19 drives the worm gear 18 to rotate in the forward direction, which in turn drives the worm wheel 17 to rotate. The worm wheel 17 drives the pressure block 13 to rotate through the connecting shaft 12. This causes one end of the pressure block 13 to push one end of the U-shaped pressure rod 8 downward. At the same time, the connecting shaft 12 drives the boss 14 to rotate. When the boss 14 touches the outside of a micro switch 15, the motor 19 stops running. During this process, the U-shaped pressure rod 8 rotates around the fixed shaft 10. The other two ends of the U-shaped pressure rod 8 push the top column 6 to move inside the guide hole 5. This causes the top column 6 to push the two side wing plates of the BIB valve 35 upward, thus opening the BIB valve 35 for use. The liquid inside the liquid bag installed on the BIB valve 35 begins to discharge under the action of gravity, directly falling to the bottom of the device. The outlet of the BIB valve 35 and the liquid will not come into contact with any other objects.

[0038] Once the discharged liquid reaches the specified amount, the motor 19 is restarted via the switch assembly. The output shaft of the motor 19 drives the worm gear 18 to rotate in the opposite direction. The worm gear 18 drives the worm wheel 17 to rotate, causing the worm wheel 17 to rotate and reset the pressure block 13 via the connecting shaft 12. When the pressure block 13 disengages from one end of the U-shaped pressure rod 8, the other two ends of the U-shaped pressure rod 8 are lifted by the gravity of the top column 6. At this time, the top column 6 disengages from the bottom of the BIB valve 35 wing plate. When the pressure at the bottom of the BIB valve 35 wing plate is released, the wing plate of the BIB valve 35 resets, and the BIB valve 35 closes, stopping the discharge of liquid. Simultaneously, the connecting shaft 12 drives the boss 14 to reverse, contacting the outside of another micro switch 15, thus stopping the motor 19.

[0039] When it is necessary to disassemble the BIB valve 35, by pushing the limiting plate 22 to rotate, the limiting plate 22 rotates around one of the connecting posts 21 as the center, so that the groove 23 disengages from the outside of the other connecting post 21. At this time, the tension spring 33 pushes the bearing post 30 to move upward, so that the first annular protrusion on the outside of the BIB valve 35 disengages from the inside of the limiting groove 28. The bearing post 30 lifts the BIB valve 35, making it easy to pick up and disassemble the BIB valve 35. The operation is simple and quick.

[0040] When BIB valve 35 needs to be installed, the second annular protrusion on the outside of BIB valve 35 is placed inside the second placement groove 34, and BIB valve 35 is pushed downward to move it, so that tension spring 33 is in a stretched state. By moving the bearing column 30 outside the sliding column 32, the first annular protrusion on the outside of BIB valve 35 falls into the limiting groove 28, and one end of BIB valve 35 is inserted into the through groove 4. At this time, the limiting plate 22 can be pushed, so that the limiting plate 22 moves above BIB valve 35, and the groove 23 abuts against the outside of another connecting column 21, thereby completing the positioning and installation of BIB valve 35.

[0041] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A liquid material feeding system, including a support plate (1), characterized in that: The top of the support plate (1) is fixedly connected to a fixing frame (2). The top of the fixing frame (2) is provided with a first placement groove (3). The bottom of the first placement groove (3) is provided with a through groove (4). Guide holes (5) are opened on both sides of the through groove (4) at the bottom of the first placement groove (3). A top column (6) is placed inside the guide hole (5). Two slots (7) are opened on the front side of the fixing frame (2). The two slots (7) are respectively connected to the two guide holes (5). The two ends of the U-shaped pressure rod (8) are movably inserted into the two slots (7). The two ends of the U-shaped pressure rod (8) are respectively inserted into the two guide holes (5) and are respectively located below the two top columns (6). The right side of the fixing frame (2) is provided with a shaft hole (9). The shaft hole (9) is connected to the two slots (7) respectively. A fixing shaft (10) is movably inserted into the shaft hole (9). The top of the support plate (1) is fixedly connected to the front side of the U-shaped pressure rod (8) with a U-shaped frame (11). The inner side of the U-shaped frame (11) is movably connected to a connecting shaft (12). A pressure block (13) is fixedly sleeved on the outer side of the connecting shaft (12). One end of the connecting shaft (12) extends to one side of the U-shaped frame (11) and a boss (14) is fixedly sleeved on one end. Two micro switches (15) are installed on one side of the U-shaped frame (11). The top of the support plate (1) is fixedly connected to the housing (16) on the other side of the U-shaped frame (11). The other end of the connecting shaft (12) extends to the other side of the U-shaped frame (11) and is movably inserted into the inside of the housing (16). The other end of the connecting shaft (12) is fixedly connected to the worm gear (17). The inside of the housing (16) is movably connected to the worm (18). The worm (18) is meshed with the outside of the worm gear (17). The top of the support plate (1) is fixedly connected to one end of the housing (16). The output shaft of the motor (19) is fixedly connected to one end of the worm (18) extending to the outside of the housing (16). The top of the fixed frame (2) is provided with a limiting groove (28), and the inside of the limiting groove (28) is provided with a first annular protrusion on the outside of the BIB valve (35). One end of the BIB valve (35) is inserted into the inside of the through groove (4), and the two side wing plates of the BIB valve (35) respectively abut against the bottom of the first placement groove (3) and are located above the top column (6). In use, the output shaft of the motor (19) drives the worm (18) to rotate in the forward direction, causing the worm (18) to drive the worm wheel (17) to rotate. The worm wheel (17) drives the pressure block (13) to rotate through the connecting shaft (12), causing one end of the pressure block (13) to push one end of the U-shaped pressure rod (8) downward. At the same time, the connecting shaft (12) drives the boss (14) to rotate. When the boss (14) abuts against the outside of a micro switch (15), the motor (19) stops running. During this process, the U-shaped pressure rod... The rod (8) rotates around the fixed shaft (10) and pushes the top column (6) to move inside the guide hole (5) through the other two ends of the U-shaped pressure rod (8). This causes the top column (6) to push the two side wing plates of the BIB valve (35) upward, so that the BIB valve (35) can be opened for use. The liquid inside the liquid bag installed on the BIB valve (35) begins to discharge under the action of gravity and is directly discharged to the bottom of the device. The outlet of the BIB valve (35) and the liquid will not come into contact with any other object. When the discharged liquid reaches the specified amount, the output shaft of the motor (19) drives the worm (18) to rotate in the opposite direction. The worm (18) drives the worm wheel (17) to rotate, so that the worm wheel (17) drives the pressure block (13) to rotate and reset through the connecting shaft (12). When the pressure block (13) disengages from one end of the U-shaped pressure rod (8), the other two ends of the U-shaped pressure rod (8) are lifted by the gravity of the top column (6). At this time, the top column (6) disengages from the bottom of the wing plate of the BIB valve (35). When the pressure at the bottom of the wing plate of the BIB valve (35) is released, the wing plate of the BIB valve (35) resets. At this time, the BIB valve (35) closes and stops discharging liquid. At the same time, the connecting shaft (12) drives the boss (14) to reverse and abut against the outside of another micro switch (15), that is, the motor (19) stops running.

2. The liquid material feeding system according to claim 1, characterized in that: The top of the fixing frame (2) is provided with mounting holes (20) on both sides of the first placement groove (3). A connecting column (21) is installed inside the mounting hole (20). One end of a limiting plate (22) is movably sleeved on the outside of one of the connecting columns (21). A slot (23) is provided on the outside of the other end of the limiting plate (22). The slot (23) matches the other connecting column (21).

3. The liquid material feeding system according to claim 1, characterized in that: The fixing frame (2) has first insertion holes (24) on both the left and right sides. First limiting posts (25) are inserted into the two first insertion holes (24). One end of each of the two first limiting posts (25) passes through the outer end of the connecting post (21).

4. The liquid material feeding system according to claim 1, characterized in that: The front end of the fixing frame (2) is provided with a second insertion hole (26), and a second limiting post (27) is inserted into the second insertion hole (26). One end of the second limiting post (27) is movably inserted through the other end of the outer side of the fixing shaft (10).

5. The liquid material feeding system according to claim 1, characterized in that: Two connecting plates (29) are fixedly connected to the top of the support plate (1) away from the U-shaped frame (11). A bearing column (30) is slidably connected between the two connecting plates (29). A fixing plate (31) is fixedly connected between the two connecting plates (29) above the bearing column (30). A sliding column (32) is fixedly connected to the bottom of the two fixing plates (31). One end of the two sliding columns (32) is movably inserted through the top two ends of the bearing column (30). One end of the two sliding columns (32) is fixedly connected to the top of the support plate (1). A second placement groove (34) is provided on the bearing column (30). A tension spring (33) is movably sleeved on the outside of the sliding column (32) between the bearing column (30) and the fixing plate (31). One end of the tension spring (33) is fixedly connected to the top of the bearing column (30), and the other end of the tension spring (33) is fixedly connected to the bottom of the fixing plate (31).

6. The liquid material feeding system according to claim 5, characterized in that: The bottom of the support plate (1) is provided with a fixing tube (36), and the second annular protrusion on the outside of the BIB valve (35) is placed inside the second placement groove (34).

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