A liquid filling system suitable for multiple containers

Abstract

The application relates to the technical field of tissue fixing liquid adding technology, and discloses a liquid adding system suitable for multiple containers, which comprises a liquid adding tank, the bottom of the liquid adding tank is provided with a liquid guide pipe, the lower end of the liquid guide pipe is sequentially connected with a plurality of liquid adding cylinders, a piston plate is sealingly and slidably arranged in the liquid adding cylinder, and the bottom of the lowermost liquid adding cylinder is provided with a liquid outlet pipe; the piston plates are driven to move by a rod body; the liquid adding system suitable for multiple containers can realize continuous automatic liquid adding of the containers through the design of the multi-cylinder liquid adding cylinder structure comprising a liquid adding cylinder one and a liquid adding cylinder two, the cooperation of the rod body and the piston plate in the liquid adding cylinder, and the cooperation of the liquid inlet channel, the liquid adding channel, the liquid guide pipe and the liquid outlet pipe in the liquid adding cylinder, the liquid adding amount of the tissue fixing liquid can be controlled by controlling the stroke of the rod body, the liquid adding efficiency can be improved, and the liquid adding amount can be accurately controlled.

Description

Technical Field

[0001] This invention relates to the field of tissue fixative dispensing technology, specifically to a liquid dispensing system suitable for multiple containers. Background Technology

[0002] Specimen preparation and preservation play a crucial role in many fields such as biology, medicine, and education. Formaldehyde solution (tissue fixative) has long been a commonly used reagent for specimen preservation due to its excellent bactericidal and antiseptic properties.

[0003] In small laboratories or educational institutions, staff often use manual liquid addition. They use tools such as graduated cylinders and pipettes to measure a certain amount of liquid from the container storing formaldehyde and then slowly add it to the specimen preservation container. This manual operation is not only inefficient and time-consuming, but also prone to causing staff fatigue, especially when processing large numbers of specimens, leading to decreased accuracy in liquid addition.

[0004] With the increasing demand for specimen preparation, some larger institutions have introduced simple, semi-automated formaldehyde dispensing equipment. While these devices partially reduce manual labor—for example, by using peristaltic pumps to extract formaldehyde from storage tanks and deliver it to the dispensing terminal—they lack precise flow control. For specimen preservation scenarios with stringent formaldehyde concentration requirements, such as precious biological samples and pathological tissue specimens, inaccurate dispensing volumes can lead to poor preservation results, causing specimen deterioration and damage.

[0005] Currently available liquid addition systems generally do not take into account the compatibility issues of different sizes or types of specimen containers. Whether it is a cylindrical specimen cylinder or a bagged specimen bag, traditional liquid addition methods are difficult to adapt flexibly and often require manual adjustment of the height and angle of the liquid addition tube, which is cumbersome. Summary of the Invention

[0006] To address the issues of insufficient precise flow control and poor compatibility with different specifications or types of specimen containers in existing liquid addition equipment, the present invention provides the following technical solution: a liquid addition system suitable for multiple containers, comprising a liquid addition tank, a liquid guide pipe at the bottom of the liquid addition tank, a plurality of liquid addition cylinders connected in series at the lower end of the liquid guide pipe, a piston plate being slidably and sealed inside the liquid addition cylinder, and a liquid outlet pipe being installed at the bottom of the lowest liquid addition cylinder;

[0007] Several piston plates are driven to move by a rod. When several liquid addition cylinders are in normal condition, the piston plates will add the tissue fixation fluid inside the corresponding liquid addition cylinder into the container through the liquid outlet pipe when the rod moves up or down.

[0008] Furthermore, there are two sets of liquid filling cylinders, including liquid filling cylinder one and liquid filling cylinder two. The bottom of liquid filling cylinder two is provided with liquid filling channel two, which is connected to the liquid outlet pipe.

[0009] The top of the liquid filling cylinder is provided with a liquid inlet channel 1 that communicates with the liquid guide pipe, and a liquid filling channel 1 is installed between the space above the piston plate 1 inside the liquid filling cylinder 1 and the liquid outlet pipe.

[0010] A liquid inlet channel 2 is installed between the space below the piston plate 2 inside the liquid filling cylinder 2 and the liquid guide pipe.

[0011] When the rod moves downward, piston plate two pushes the tissue fixation fluid inside the liquid addition cylinder two into the container through liquid addition channel two and liquid outlet pipe; when the rod moves upward, piston plate one pushes the tissue fixation fluid inside the liquid addition cylinder one into the container through liquid addition channel one and liquid outlet pipe.

[0012] Furthermore, a liquid guiding component is provided between the first liquid inlet channel and the first liquid addition channel, as well as between the second liquid inlet channel and the second liquid addition channel. The liquid guiding component is used to allow the tissue fixation fluid to enter the corresponding liquid addition cylinder through the first liquid inlet channel or the second liquid inlet channel, and to allow the tissue fixation fluid in the first liquid addition cylinder or the second liquid addition cylinder to enter the outlet pipe through the corresponding liquid addition channel.

[0013] Furthermore, the liquid guiding assembly between the liquid inlet channel two and the liquid addition channel two includes a conical plug block one and a plug block two, a mating ring one, and a mating ring two;

[0014] Both the first block and the first mating ring are located inside the second liquid filling channel, and both the second block and the second mating ring are located inside the second liquid inlet channel.

[0015] When the piston plate 2 moves downward, under the pressure of the tissue fixation fluid, the plug 1 separates from the mating ring 1, and the liquid outlet pipe connects to the inside of the liquid addition cylinder 2. At the same time, the plug 2 and the mating ring 2 cooperate, and the liquid inlet channel 2 is closed.

[0016] When the piston plate 2 moves upward, the plug 1 engages with the mating ring 1, the liquid filling channel 2 is closed, and at the same time the plug 2 separates from the mating ring 2, the tissue fixation fluid in the liquid guide tube enters the liquid filling cylinder 2 through the liquid inlet channel 2.

[0017] Furthermore, the liquid guiding assembly between the second liquid inlet channel and the second liquid filling channel includes a steel wire, and a sleeve rod is fixedly installed on the bottom surface inside the second liquid filling cylinder. The steel wire is slidably installed inside the sleeve rod, with one end of the steel wire extending into the second liquid inlet channel and the other end extending into the second liquid filling channel.

[0018] Both the first and second plugs are slidably disposed on the surface of the steel wire. A limiting piece is fixedly installed at the free end of the steel wire inside the second liquid filling channel. The first mating ring is fixedly disposed inside the second liquid filling channel, and the second mating ring is fixedly disposed on the surface of the steel wire and slidably sealed to the second liquid inlet channel. A stop block is fixedly disposed on the inner wall of the second liquid inlet channel, and the stop block is located between the second plug and the second mating ring.

[0019] The surface of the liquid inlet channel two is provided with an adjustment handle two. By rotating the adjustment handle two, the steel wire is moved, so that the first block and the first mating ring are in a mating state, and the second block and the second mating ring are in a disengaged state.

[0020] Furthermore, an adjustment handle is provided on the surface of the liquid filling channel one. By rotating the adjustment handle one, the steel wire in the liquid guiding component inside the liquid filling cylinder one is moved, so that the liquid inlet channel one is in the open state and the liquid filling channel one is in the closed state.

[0021] Furthermore, an intermediate tube is installed in the liquid guide tube, and a bidirectional motor with a set rotation angle is installed on the side of the intermediate tube. The output end of the bidirectional motor located inside the intermediate tube is equipped with a crankshaft, which drives the rod to move up or down.

[0022] Furthermore, it also includes a fixed cylinder, on the inner wall of which an annular bottom plate and a top cover are fixedly installed, and an adjusting gear ring is provided between the bottom plate and the top cover, the adjusting gear ring being rotatably installed inside the fixed cylinder;

[0023] The adjusting gear ring consists of two fan-shaped inner gear rings and two fan-shaped outer gear rings, which are alternately distributed. Two large gears and two small gears are rotatably installed between the base plate and the top cover. The two large gears mesh with the two inner gear rings respectively, and the two small gears mesh with the two outer gear rings respectively.

[0024] The bottom surface of the base plate and the upper surface of the top cover are provided with four sets of supports. The supports are fixedly connected to the corresponding large gear or small gear. A cylinder is fixedly installed on the surface of the support, and a suction cup is installed on the free end of the cylinder rod.

[0025] The cylinder rods of the four sets of cylinders in the base plate or top cover are distributed along the radial direction of the fixed cylinder or are distributed collinearly in pairs.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] 1. This liquid dispensing system, applicable to multiple containers, utilizes a multi-cylinder structure including dispensing cylinder one and dispensing cylinder two. By cooperating with the piston plate inside the dispensing cylinder and with the inlet channel, dispensing channel, guide pipe, and outlet pipe within the dispensing cylinder, continuous automatic dispensing of liquid to the container can be achieved. Furthermore, by controlling the stroke of the rod, the dispensing volume of tissue fixative can be controlled, improving dispensing efficiency and precisely controlling the dispensing volume. Additionally, by designing a guide component and adjusting handle between the inlet channel and the dispensing channel, the flow direction of the tissue fixative can be controlled according to the piston plate's movement direction. Moreover, if one dispensing cylinder malfunctions, rotating the adjusting handle can stop the dispensing operation of that cylinder without affecting the dispensing of other cylinders.

[0028] 2. This liquid filling system, applicable to multiple containers, features an adjusting gear ring with alternating external and internal gear rings designed inside the fixed cylinder. These rings engage with large and small gears respectively, allowing adjustment of the position distribution of four sets of cylinders according to the type of container. This enables the fixing of cylindrical containers and the opening and fixing of bagged containers, making it suitable for filling and fixing containers of various types and specifications. Attached Figure Description

[0029] Figure 1 This is a perspective view of the overall structure of the liquid addition system of the present invention;

[0030] Figure 2 This is a schematic diagram of the overall structure of the liquid addition tank of the present invention;

[0031] Figure 3 This is a schematic diagram of the internal structure of a portion of the bottom of the liquid addition tank of the present invention;

[0032] Figure 4 For the present invention Figure 3 Enlarged structural diagram at point A;

[0033] Figure 5 This is a three-dimensional view of the liquid guiding component structure in the second liquid filling cylinder of the present invention;

[0034] Figure 6 The three-dimensional representation of the internal structure of the fixed cylinder of the present invention. Figure 1 ;

[0035] Figure 7 The three-dimensional representation of the internal structure of the fixed cylinder of the present invention. Figure 2 ;

[0036] Figure 8 This is a schematic diagram of the distribution structure of the adjusting gear ring, adjusting gear one, and adjusting gear two inside the fixed cylinder of the present invention;

[0037] Figure 9 This is a three-dimensional view of the distribution structure of the adjusting gear ring, adjusting gear one, and adjusting gear two of the present invention.

[0038] In the diagram: 1. Liquid filling tank; 101. Liquid inlet; 2. Liquid guide pipe; 3. Liquid filling cylinder one; 31. Liquid inlet channel one; 32. Liquid filling channel one; 33. Adjusting handle one; 4. Liquid filling cylinder two; 41. Liquid inlet channel two; 42. Liquid filling channel two; 43. Adjusting handle two; 5. Rod; 51. Piston plate one; 52. Piston plate two; 6. Intermediate pipe; 7. Bidirectional motor; 8. Steel wire; 81. Block one; 82. Block two 83. Matching Ring 1; 84. Matching Ring 2; 85. Stop; 86. Limiting Plate; 9. Sleeve Rod; 10. Discharge Pipe; 11. Liquid Level Sensor; 12. Drain Pipe; 121. Backwash Pipe; 13. Fixing Cylinder; 131. Base Plate; 132. Top Cover; 14. Adjusting Gear Ring; 141. Internal Gear Ring; 142. External Gear Ring; 15. Large Gear; 16. Small Gear; 17. Support; 18. Cylinder; 19. Suction Cup. Detailed Implementation

[0039] 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.

[0040] An example of a liquid dispensing system suitable for multiple containers is as follows:

[0041] Please see Figures 1-9 A liquid addition system suitable for multiple containers includes a liquid addition tank 1. The top of the liquid addition tank 1 is provided with a liquid inlet 101 for adding tissue fixation fluid into the liquid addition tank 1. The bottom of the liquid addition tank 1 is provided with a drain pipe 12 and a backwash pipe 121 for rinsing the inside of the liquid addition tank 1. The bottom of the liquid addition tank 1 is provided with a liquid guide pipe 2. Several liquid addition cylinders are connected in series at the lower end of the liquid guide pipe 2. A piston plate is slidably installed inside the liquid addition cylinder. The bottom of the lowest liquid addition cylinder is provided with a liquid outlet pipe 10.

[0042] Several piston plates are driven to move by rod 5. When several liquid addition cylinders are in normal condition, when rod 5 moves up or down, the piston plates will add the tissue fixation fluid inside the corresponding liquid addition cylinder into the container through the liquid outlet pipe 10.

[0043] The liquid guide tube 2 is equipped with an intermediate tube 6. A bidirectional motor 7 with a set rotation angle is installed on the side of the intermediate tube 6. The output end of the bidirectional motor 7 located inside the intermediate tube 6 is equipped with a crankshaft. A connecting rod is provided between the crankshaft and the upper end of the rod body 5. The crankshaft drives the rod body 5 to move up or down. A liquid level sensor 11 is provided on the side surface of the liquid tank 1. The liquid level sensor 11 is electrically connected to the bidirectional motor 7. When the tissue fixation fluid in the liquid tank 1 is lower than the set threshold, the liquid level sensor 11 sends a signal to the bidirectional motor 7, and the bidirectional motor 7 stops running to prevent the piston plate inside the liquid tank from moving without liquid.

[0044] Specifically, by setting the forward and reverse rotation angles of the bidirectional motor 7 (where the forward and reverse rotation angles are the same), the travel of the rod 5 can be controlled, thereby controlling the travel of the piston plate in the liquid addition cylinder, and thus controlling the volume of liquid added in each liquid addition cylinder. Based on the amount of liquid added to the container, the forward and reverse rotation angles of the bidirectional motor 7 and the number of forward and reverse rotation cycles can be set in advance.

[0045] It should be noted that there are two sets of liquid filling cylinders, including liquid filling cylinder 3 and liquid filling cylinder 4. The space on the side of the piston plate of liquid filling cylinder 3 and liquid filling cylinder 4 that is not used for fixing liquid is open to the outside. Liquid filling cylinder 4 has a liquid filling channel 2 42 at the bottom and a liquid outlet pipe 10 installed at the bottom of liquid filling cylinder 4. Liquid filling channel 2 42 is connected to liquid outlet pipe 10.

[0046] The top of the liquid filling cylinder 3 is provided with a liquid inlet channel 31 that communicates with the liquid guide pipe 2. The space above the piston plate 51 inside the liquid filling cylinder 3 and the liquid outlet pipe 10 are provided with a liquid filling channel 32. The space below the piston plate 52 inside the liquid filling cylinder 4 and the liquid guide pipe 2 are provided with a liquid inlet channel 41.

[0047] Specifically, when rod 5 moves downward, piston plate 2 52 pushes the tissue fixation fluid inside liquid addition cylinder 2 4 into the container through liquid addition channel 2 42 and liquid outlet pipe 10; when rod 5 moves upward, piston plate 1 51 pushes the tissue fixation fluid inside liquid addition cylinder 3 into the container through liquid addition channel 1 32 and liquid outlet pipe 10. When rod 5 moves, tissue fixation fluid is continuously added to the container. This allows for setting and controlling the amount of tissue fixation fluid added, while also enabling continuous addition, which helps improve the efficiency of tissue fixation fluid addition.

[0048] Based on this, liquid guiding components are provided between liquid inlet channel 31 and liquid addition channel 32, and between liquid inlet channel 41 and liquid addition channel 42. The liquid guiding components are used to allow the tissue fixation fluid to enter the corresponding liquid addition cylinder through liquid inlet channel 31 or liquid inlet channel 41, and to allow the tissue fixation fluid in liquid addition cylinder 3 or liquid addition cylinder 4 to enter the outlet pipe 10 through the corresponding liquid addition channel.

[0049] It should be noted that the liquid guiding assembly between the liquid inlet channel 2 41 and the liquid filling channel 2 42 includes a conical plug 1 81 and a plug 2 82, a mating ring 1 83 and a mating ring 2 84; the plug 1 81 and the mating ring 1 83 are both located inside the liquid filling channel 2 42, and a return spring is provided between the plug 1 81 and the mating ring 1 83; the plug 2 82 and the mating ring 2 84 are both located inside the liquid inlet channel 2 41.

[0050] When piston plate 2 52 moves downward, under the pressure of the tissue fixation fluid, block 1 81 separates from mating ring 1 83, and the outlet pipe 10 connects with the interior of the filling cylinder 2 4. At the same time, block 2 82 engages with mating ring 2 84, and the inlet channel 2 41 is closed. When piston plate 2 52 moves upward, under the pressure of the tissue fixation fluid inside the outlet pipe 10, or under the action of the return spring, block 1 81 engages with mating ring 1 83, and the filling channel 2 42 is closed. At the same time, block 2 82 separates from mating ring 2 84, and the tissue fixation fluid in the guide pipe 2 enters the interior of the filling cylinder 2 4 through the inlet channel 2 41.

[0051] It should also be noted that the plug 81 and mating ring 83 in the liquid guiding assembly between the liquid inlet channel 31 and the liquid filling channel 32 are located inside the liquid filling channel 32. A return spring is provided between the plug 81 and the mating ring 83. The plug 82 and the mating ring 84 are located inside the liquid inlet channel 31. The mating method between the conical plug 81 and the plug 82, the mating ring 83, and the mating ring 84 is as follows:

[0052] When piston plate 51 moves upward, under the pressure of the tissue fixation fluid, block 81 separates from mating ring 83, and the outlet pipe 10 connects with the inside of the filling cylinder 3. At the same time, block 82 engages with mating ring 84, and the inlet channel 31 is closed. When piston plate 51 moves downward, under the action of the return spring, block 81 engages with mating ring 83, and the filling channel 32 is closed. At the same time, block 82 separates from mating ring 84, and the tissue fixation fluid in the guide pipe 2 enters the inside of the filling cylinder 3 through the inlet channel 31.

[0053] When both liquid addition cylinder 3 and liquid addition cylinder 4 are in normal working order, the tissue fixative can be continuously added to the container through the above process. If either liquid addition cylinder 3 or liquid addition cylinder 4 malfunctions, the following design is required to continue the liquid addition process:

[0054] The liquid guiding assembly between the liquid inlet channel 2 41 and the liquid filling channel 2 42 includes a steel wire 8. A sleeve rod 9 is fixedly installed on the bottom surface inside the liquid filling cylinder 2 4. The steel wire 8 is slidably installed inside the sleeve rod 9. One end of the steel wire 8 extends into the liquid inlet channel 2 41, and the other end extends into the liquid filling channel 2 42.

[0055] Both the first block 81 and the second block 82 are slidably disposed on the surface of the steel wire 8. The free end of the steel wire 8 located inside the second liquid filling channel 42 is fixedly installed with a limiting piece 86. The first mating ring 83 is fixedly disposed inside the second liquid filling channel 42, and the second mating ring 84 is fixedly disposed on the surface of the steel wire 8 and is slidably sealed to the second liquid inlet channel 41. A stop block 85 is fixedly disposed on the inner wall of the second liquid inlet channel 41, and the stop block 85 is located between the second block 82 and the second mating ring 84.

[0056] The surface of the liquid inlet channel 2 41 is provided with an adjustment handle 2 43. By rotating the adjustment handle 2 43, the steel wire 8 is moved, so that the block 1 81 and the mating ring 1 83 are in a mating state, and the block 2 82 and the mating ring 2 84 are in a disengaged state.

[0057] Specifically, when the filling cylinder 24 malfunctions, the filling action of the filling cylinder 24 is stopped. The specific operation is as follows: turn the adjusting handle 243. The adjusting handle 243 pulls the steel wire 8 to move. The steel wire 8 drives the blocking block 1 81 to move through the limiting plate 86, and at the same time drives the mating ring 2 84 to move. The blocking block 1 81 will cooperate with the mating ring 1 83, and the filling channel 2 42 is in a closed state. At the same time, under the action of the stop block 85, the blocking block 2 82 and the mating ring 2 84 are always in a separated state. Therefore, the filling channel 2 41 is always in an open state. Therefore, when the piston plate 2 52 in the filling cylinder 24 reciprocates, the filling cylinder 24 has no filling action and will not interfere with the filling process of the filling cylinder 3.

[0058] It should be noted that the surface of the liquid filling channel 32 is provided with an adjustment handle 33. By rotating the adjustment handle 33, the steel wire 8 in the liquid guiding component inside the liquid filling cylinder 3 moves, so that the liquid inlet channel 31 is in the open state and the liquid filling channel 32 is in the closed state.

[0059] Specifically, when the liquid filling cylinder 3 malfunctions, the liquid filling action of the liquid filling cylinder 3 is stopped. The specific operation is as follows: turn the adjusting handle 33. The adjusting handle 33 moves the steel wire 8 towards the liquid inlet channel 31. The steel wire 8 drives the block block 81 to move through the limiting plate 86, and at the same time drives the mating ring 84 to move. The block block 81 will cooperate with the mating ring 83, and the liquid filling channel 32 is in a closed state. At the same time, under the action of the stop block 85, the block block 82 and the mating ring 84 are always in a separated state. Therefore, the liquid inlet channel 31 is always in an open state. Therefore, when the piston plate 51 in the liquid filling cylinder 3 reciprocates, the liquid filling cylinder 3 has no liquid filling action and will not interfere with the liquid filling process of the liquid filling cylinder 4.

[0060] Based on this, the liquid addition system also includes a fixed cylinder 13. An annular bottom plate 131 and a top cover 132 are fixedly installed on the inner wall of the fixed cylinder 13. An adjusting gear ring 14 is provided between the bottom plate 131 and the top cover 132. The adjusting gear ring 14 is rotatably installed inside the fixed cylinder 13.

[0061] The adjusting gear ring 14 consists of two sector-shaped internal gear rings 141 and two sector-shaped external gear rings 142, with the internal gear rings 141 and external gear rings 142 alternating. Two large gears 15 and two small gears 16 are rotatably mounted between the base plate 131 and the top cover 132. The large gears 15 are located inside the internal gear rings 141, and the small gears 16 are located outside the external gear rings 142. The two large gears 15 mesh with the two internal gear rings 141 respectively, and the two small gears 16 mesh with the two external gear rings 142 respectively. The tooth diameter of the large gears 15 is larger than that of the small gears 16. When the adjusting gear ring 14 rotates, the rotation directions of adjacent gears are opposite, and the rotational angular velocity of all gears is the same.

[0062] The bottom surface of the base plate 131 and the upper surface of the cover 132 are provided with four sets of supports 17. The supports 17 are fixedly connected to the corresponding large gear 15 or small gear 16. A cylinder 18 is fixedly installed on the surface of the support 17. A suction cup 19 is installed on the free end of the cylinder rod. The cylinder 18 and the suction cup 19 are combined to fix the cylindrical container or to open the bagged container.

[0063] The cylinder rods of the four sets of cylinders 18 in the base plate 131 or the top cover 132 are distributed along the radial direction of the fixed cylinder 13 or are collinear in pairs. Specifically, for example... Figure 6 As shown, when tissue fixative needs to be added to the cylindrical container, the air rods of the four sets of cylinders 18 are distributed along the radial direction of the fixing cylinder 13. The four sets of cylinders 18 cooperate to fix the cylindrical container, making it convenient to add tissue fixative to the cylindrical container using the liquid addition tank 1; as Figure 7 As shown, when the container is a bag container, by adjusting the rotation of the gear ring 14, the air rods of the four sets of cylinders 18 are adjusted to be collinearly distributed in pairs. At this time, the four sets of cylinders 18 cooperate with the suction cup 19 to pull open the opening of the bag container and fix the bag container, so as to facilitate the addition of tissue fixation fluid to the bag container using the liquid addition tank 1.

[0064] The working principle of this liquid dispensing system suitable for multiple containers is as follows:

[0065] First, adjust the distribution of the four sets of cylinders 18 according to the type of container to be filled with liquid. Then, use the four sets of cylinders 18 in conjunction with the suction cup 19 to fix the container in the fixed cylinder 13.

[0066] Then, based on the volume of liquid added to the container, the forward and reverse rotation angles of the bidirectional motor 7 and the number of reverse cyclic rotations are set. The bidirectional motor 7 is started, and the bidirectional motor 7 drives the rod 5 to move up and down reciprocally. The rod 5 drives the piston plate to move. By moving the piston plate downward or upward, the tissue fixative in the corresponding liquid addition cylinder is added to the container until the tissue fixative in the container reaches the set amount. Then the bidirectional motor 7 stops running, thus completing the addition of tissue fixative to the container.

[0067] 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.

Claims

1. A liquid dispensing system suitable for multiple containers, comprising a dispensing tank (1), characterized in that: The bottom of the liquid filling tank (1) is provided with a liquid guide pipe (2), and several liquid filling cylinders are connected in series at the lower end of the liquid guide pipe (2). A piston plate is installed inside the liquid filling cylinder in a sealed sliding manner, and a liquid outlet pipe (10) is installed at the bottom of the lowest liquid filling cylinder. Several piston plates are driven to move by rod (5). When several liquid addition cylinders are in normal state, when the rod (5) moves up or down, the piston plates will add the tissue fixation fluid inside the corresponding liquid addition cylinder into the container through the liquid outlet pipe (10). The liquid filling cylinder has two sets, including liquid filling cylinder one (3) and liquid filling cylinder two (4). The bottom of liquid filling cylinder two (4) is provided with liquid filling channel two (42), which is connected to the liquid outlet pipe (10). The top of the liquid filling cylinder (3) is provided with a liquid inlet channel (31) that communicates with the liquid guide pipe (2), and a liquid filling channel (32) is installed between the space above the piston plate (51) inside the liquid filling cylinder (3) and the liquid outlet pipe (10). A liquid inlet channel 2 (41) is installed between the space below the piston plate 2 (52) inside the liquid filling cylinder 2 (4) and the liquid guide pipe (2). When the rod (5) moves downward, the piston plate (52) pushes the tissue fixation fluid inside the liquid addition cylinder (4) into the container through the liquid addition channel (42) and the liquid outlet pipe (10); when the rod (5) moves upward, the piston plate (51) pushes the tissue fixation fluid inside the liquid addition cylinder (3) into the container through the liquid addition channel (32) and the liquid outlet pipe (10); The liquid guide tube (2) is equipped with an intermediate tube (6), and a bidirectional motor (7) with a set rotation angle is installed on the side of the intermediate tube (6). The output end of the bidirectional motor (7) located inside the intermediate tube (6) is equipped with a crankshaft, which drives the rod (5) to move up or down.

2. The liquid dispensing system suitable for multiple containers according to claim 1, characterized in that: Liquid guiding components are provided between the liquid inlet channel 1 (31) and the liquid addition channel 1 (32) and between the liquid inlet channel 2 (41) and the liquid addition channel 2 (42). The liquid guiding components are used to allow the tissue fixation liquid to enter the corresponding liquid addition cylinder through the liquid inlet channel 1 (31) or the liquid inlet channel 2 (41), and to allow the tissue fixation liquid in the liquid addition cylinder 1 (3) or the liquid addition cylinder 2 (4) to enter the liquid outlet pipe (10) through the corresponding liquid addition channel.

3. The liquid dispensing system suitable for multiple containers according to claim 2, characterized in that: The liquid guiding assembly between the liquid inlet channel 2 (41) and the liquid filling channel 2 (42) includes a conical plug 1 (81) and a plug 2 (82), a mating ring 1 (83), and a mating ring 2 (84). The first block (81) and the first mating ring (83) are both located inside the second liquid filling channel (42), and the second block (82) and the second mating ring (84) are both located inside the second liquid inlet channel (41); When the piston plate 2 (52) moves downward, under the pressure of the tissue fixation fluid, the plug block 1 (81) separates from the mating ring 1 (83), the liquid outlet pipe (10) connects with the inside of the liquid addition cylinder 2 (4), and at the same time, the plug block 2 (82) and the mating ring 2 (84) cooperate, and the liquid inlet channel 2 (41) is closed. When the piston plate 2 (52) moves upward, the block 1 (81) engages with the mating ring 1 (83), the liquid filling channel 2 (42) is closed, and at the same time the block 2 (82) separates from the mating ring 2 (84), and the tissue fixation fluid in the liquid guide tube (2) enters the liquid filling cylinder 2 (4) through the liquid inlet channel 2 (41).

4. The liquid dispensing system suitable for multiple containers according to claim 3, characterized in that: The liquid guiding assembly between the liquid inlet channel 2 (41) and the liquid filling channel 2 (42) includes a steel wire (8). A sleeve rod (9) is fixedly installed on the bottom surface inside the liquid filling cylinder 2 (4). The steel wire (8) is slidably installed inside the sleeve rod (9). One end of the steel wire (8) extends into the liquid inlet channel 2 (41), and the other end extends into the liquid filling channel 2 (42). Both the first block (81) and the second block (82) are slidably disposed on the surface of the steel wire (8). The free end of the steel wire (8) located inside the second liquid filling channel (42) is fixedly installed with a limiting piece (86). The first mating ring (83) is fixedly disposed inside the second liquid filling channel (42). The second mating ring (84) is fixedly disposed on the surface of the steel wire (8) and is slidably sealed to the second liquid inlet channel (41). The inner wall of the second liquid inlet channel (41) is fixedly provided with a stop (85). The stop (85) is located between the second block (82) and the second mating ring (84). The surface of the liquid inlet channel 2 (41) is provided with an adjustment handle 2 (43). By rotating the adjustment handle 2 (43), the steel wire (8) is moved, so that the block 1 (81) and the mating ring 1 (83) are in a mating state, and the block 2 (82) and the mating ring 2 (84) are in a separated state.

5. The liquid dispensing system suitable for multiple containers according to claim 4, characterized in that: The surface of the liquid filling channel 1 (32) is provided with an adjustment handle 1 (33). By rotating the adjustment handle 1 (33), the steel wire (8) in the liquid guiding component inside the liquid filling cylinder 1 (3) is moved, so that the liquid inlet channel 1 (31) is in the open state and the liquid filling channel 1 (32) is in the closed state.

6. The liquid dispensing system suitable for multiple containers according to any one of claims 1-5, characterized in that: It also includes a fixed cylinder (13), on the inner wall of which an annular bottom plate (131) and a top cover (132) are fixedly installed. An adjusting gear ring (14) is provided between the bottom plate (131) and the top cover (132), and the adjusting gear ring (14) is rotatably installed inside the fixed cylinder (13). The adjusting gear ring (14) is composed of two fan-shaped internal gear rings (141) and two fan-shaped external gear rings (142). The internal gear rings (141) and external gear rings (142) are alternately distributed. Two large gears (15) and two small gears (16) are rotatably installed between the base plate (131) and the top cover (132). The two large gears (15) mesh with the two internal gear rings (141) respectively, and the two small gears (16) mesh with the two external gear rings (142) respectively. The bottom surface of the base plate (131) and the upper surface of the cover (132) are provided with four sets of supports (17). The supports (17) are fixedly connected to the corresponding large gear (15) or small gear (16). A cylinder (18) is fixedly installed on the surface of the support (17). A suction cup (19) is installed on the free end of the cylinder (18). The cylinder rods of the four sets of cylinders (18) in the base plate (131) or the top cover (132) are distributed along the radial direction of the fixed cylinder (13) or are distributed collinearly in pairs.

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