Automatic liquid preparation device

Abstract

The invention relates to an automatic liquid preparation device which comprises a rack, a rotary driving structure and a liquid preparation control structure, the rotary driving structure and the liquid preparation control structure are arranged on the rack, and a liquid medicine discharging barrel is arranged on the rack; the rotating driving structure comprises a rotating disc arranged on the rack, a plurality of medicine liquid storage groups which are circumferentially distributed at equal intervals are arranged on the rotating disc, and a plurality of medicine liquid discharging ports which are sequentially communicated with the medicine liquid storage groups are further formed in the rotating disc; the liquid medicine discharging port sequentially conveys liquid medicine in the liquid medicine storage set into the liquid medicine discharging barrel along with circumferential rotation of the rotating disc. The liquid medicine control structure comprises a pneumatic diaphragm pump arranged on the machine frame and a plurality of two-position three-way electromagnetic valves arranged on the rotating disc, each two-position three-way electromagnetic valve is connected with the corresponding liquid medicine storage set through a liquid outlet pipe, and the liquid medicine control structure further comprises siphon assemblies arranged in the liquid medicine storage sets. The automatic liquid preparation device has the following advantages that the communication performance of the siphon is guaranteed, the liquid preparation precision and efficiency of automatic liquid preparation are improved, and meanwhile, the siphon can be replaced without shutdown.

Description

Technical Field

[0001] The present invention belongs to the field of automatic liquid dispensing, and particularly relates to an automatic liquid dispensing device. Background Art

[0002] The liquid chemicals commonly used in the semiconductor manufacturing process, including deionized water, isopropyl alcohol, trichloroethylene, acetone, and xylene, are used for silicon wafer rinsing, diluting cleaning agents, and removing photoresist, etc. Prolonged direct contact with these liquid medicines will cause certain harm to human health. Therefore, when preparing liquid medicines, an automatic liquid medicine device is needed to replace manual liquid medicine preparation.

[0003] The existing automatic liquid dispensing devices generally achieve automatic, precise, and efficient and stable liquid dispensing through siphon liquid dispensing. A water stop valve is provided at the bottom of the U-shaped siphon pipeline. When the liquid dispensing stops, simply closing the water stop valve at the bottom of the siphon can ensure that the siphon is filled with liquid, and normal liquid dispensing can be restored by opening the water stop valve again. However, due to the large negative pressure at the inner top of the inverted U-shaped siphon, vaporized water or air separated from the water is likely to be generated inside. After a certain amount of these gases accumulates, the cross-sectional area of the water flow at the top of the inverted U-shaped siphon is too small, seriously affecting the connectivity of the siphon and thus the efficiency of automatic liquid dispensing; secondly, the sealing parts of the siphon are prone to wear, resulting in the loss of siphon ability. When the siphon is in use, it moves around, affecting the liquid dispensing accuracy and efficiency. During maintenance, it is necessary to stop the machine to replace the siphon, and the maintenance time is long, further affecting the efficiency of automatic liquid dispensing. Summary of the Invention

[0004] The purpose of the present invention is to overcome the above deficiencies, and provide an automatic liquid dispensing device to ensure the connectivity of the siphon, improve the liquid dispensing accuracy and efficiency of automatic liquid dispensing, and at the same time realize the replacement of the siphon without stopping the machine.

[0005] The purpose of the present invention is achieved through the following technical solutions: an automatic liquid dispensing device, including a frame and a rotation driving structure and a liquid dispensing control structure arranged on the frame, and a liquid medicine discharging cylinder is provided on the frame; The rotation driving structure includes a rotating disk arranged on the frame. The rotating disk has a plurality of liquid medicine storage groups evenly distributed in a circumferential direction at equal intervals. The rotating disk also has a plurality of liquid medicine discharging ports sequentially communicated with the liquid medicine storage groups. The liquid medicine discharging ports sequentially transfer the liquid medicine in the liquid medicine storage groups into the liquid medicine discharging cylinder as the rotating disk rotates circumferentially; The liquid medicine control structure includes a pneumatic diaphragm pump placed on the frame and a plurality of two-way three-way solenoid valves arranged on the rotating disk. Each two-way three-way solenoid valve is connected to the corresponding liquid medicine storage group through a liquid outlet pipe, and each two-way three-way solenoid valve is connected to the corresponding liquid medicine discharge port. The liquid medicine control structure also includes a siphon assembly placed inside the liquid medicine storage group. The pneumatic diaphragm pump pumps and presses the inside of the liquid medicine storage group to form a negative pressure state inside. After the two-way three-way solenoid valve is opened, the liquid medicine in the liquid medicine storage group is siphoned by the siphon assembly and passes through the liquid outlet pipe to the corresponding liquid medicine discharge port.

[0006] A further improvement of the present invention lies in that: the liquid medicine storage group includes a liquid medicine storage cylinder body arranged on the upper end surface of the rotating disk and a sampling cylinder body placed beside the liquid medicine storage cylinder body; The siphon assembly includes a negative pressure pipe arranged on the rotating disk. One end of the negative pressure pipe is connected to the pneumatic diaphragm pump, and the other end of the negative pressure pipe is connected to the sampling cylinder body. The siphon assembly also includes a siphon pipe connecting the correspondingly arranged liquid medicine storage cylinder body and the sampling cylinder body. The siphon pipe is of a U-shaped structure. One end of the siphon pipe extends into the liquid medicine storage cylinder body from top to bottom, and the other end of the siphon pipe extends into the sampling cylinder body from top to bottom.

[0007] A further improvement of the present invention lies in that: the siphon pipe and the corresponding liquid medicine storage cylinder body and the sampling cylinder body are connected in a sealed and detachable manner through a sealing and reinforcement member.

[0008] A further improvement of the present invention lies in that: the sealing and reinforcement member includes a rotating fastening member arranged on the upper end surfaces of the liquid medicine storage cylinder body and the sampling cylinder body. The upper end surfaces of the liquid medicine storage cylinder body and the sampling cylinder body both have vertically arranged fixed connection pipes. A fixed insertion pipe penetrates through the fixed connection pipes. Both the upper and lower ends of the fixed insertion pipe protrude from the ends of the fixed connection pipes. A sleeve is sleeved on the end of the siphon pipe. The rotating fastening member includes a rotating table portion and a fastening cylinder portion placed on the rotating table portion. The fastening cylinder portion is in an embedded rotating connection with the corresponding liquid medicine storage cylinder body or sampling cylinder body and is fixed through bolts. The sleeve extends into the fastening cylinder portion from top to bottom and is in threaded connection with the fastening cylinder portion. The upper end of the fixed connection pipe has a concentric clamping pipe. The inner diameter of the clamping pipe is larger than the inner diameter of the fixed connection pipe. When the rotating fastening member rotates in threads with the sleeve, the sleeve and the siphon pipe move synchronously. The clamping pipe is embedded between the sleeve and the siphon pipe. At this time, the upper end of the fixed insertion pipe extends into the siphon pipe and realizes a sealed fit under the clamping force of the sleeve and the clamping pipe.

[0009] A further improvement of the present invention lies in that: the sleeve includes a fixed ring portion fixedly connected to the end of the siphon pipe and a connecting ring portion placed under the fixed ring portion. The connecting ring portion is concentric with the siphon pipe and there is a space for the vertical penetration of the clamping pipe between the connecting ring portion and the siphon pipe. Rubber sealing layers I are arranged on both side surfaces of the end of the siphon pipe.

[0010] A further improvement of the present invention lies in that: the outer end face of the upper end of the clamping tube has an inclined guiding surface I, and the inner wall of the connecting ring part has an inclined guiding surface II that cooperates with the inclined guiding surface I. When the rotating fastener is in threaded cooperation with the connecting ring part of the sleeve, the connecting ring part is displaced towards the rotating fastener, and the inclined guiding surface I and the inclined guiding surface II cooperate and extrude with each other. At the same time, the end of the siphon tube moves and cooperates towards the space between the clamping tube and the fixed insertion tube, thereby completing the clamping and sealing cooperation between the fixed insertion tube and the clamping tube.

[0011] A further improvement of the present invention lies in that: both the inclined guiding surface I and the inclined guiding surface II are provided with a rubber sealing layer II.

[0012] A further improvement of the present invention lies in that: the inner wall of the upper end of the clamping tube has a guiding surface for vertically embedding the end of the siphon tube.

[0013] A further improvement of the present invention lies in that: a weighing sensor is provided at the position of the frame at the bottom of the liquid medicine discharging cylinder, and the weighing sensor is electrically connected to the pneumatic diaphragm pump and the two-position three-way solenoid valve.

[0014] A further improvement of the present invention lies in that: the bottom of the frame is provided with movable rollers, and the frame is provided with a touch control screen, an alarm lamp and a buzzer.

[0015] The present invention has the following advantages compared with the prior art: 1. In the present invention, multiple groups of sequentially corresponding liquid medicine storage groups, two-position three-way solenoid valves and liquid medicine discharge ports are arranged on the rotary drive structure, and the automation and continuity of liquid preparation are realized by rotating, which is convenient for replenishing the liquid medicine in the liquid medicine storage group without stopping the machine; secondly, a sampling cylinder is arranged beside the liquid medicine storage cylinder body, the siphon tube connects the liquid medicine storage cylinder body and the sampling cylinder, and under the pumping action of the negative pressure tube, the negative pressure inside the sampling cylinder and the liquid outlet tube is greater than that inside the siphon tube, avoiding the generation of vaporized water inside or the separation of air from the water, and ensuring the connection performance of the siphon tube and the automatic liquid preparation efficiency.

[0016] 2. In the present invention, the siphon tube is detachably and sealedly connected to the liquid medicine storage cylinder body and the sampling cylinder body through a sealing reinforcement member. By using a sealing reinforcement member with a special structure, the connection stability between the siphon tube and the liquid medicine storage cylinder body and the sampling cylinder body is improved, avoiding the displacement of the siphon tube during use, and at the same time realizing the replacement of the siphon tube without stopping the machine, further improving the automatic liquid preparation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of the present invention.

[0018] Figure 2 is Figure 1 the internal structural schematic diagram of

[0019] Figure 3 is Figure 2 A schematic position diagram of the rotation drive structure and the liquid dispensing control structure in

[0020] Figure 4 is Figure 3 A disassembled connection diagram of the siphon tube with the corresponding liquid medicine storage and sampling cylinders in

[0021] Figure 5 is Figure 4 A schematic connection diagram of the siphon tube with the corresponding liquid medicine storage and sampling cylinders in

[0022] Reference numerals in the figure: 1 - Frame, 2 - Rotation drive structure, 3 - Liquid dispensing control structure, 4 - Liquid medicine discharge cylinder, 5 - Weighing sensor; 21 - Rotating disk, 22 - Liquid medicine storage group; 221 - Liquid medicine storage cylinder, 222 - Sampling cylinder; 31 - Pneumatic diaphragm pump, 32 - Two - way three - way solenoid valve, 33 - Liquid outlet pipe, 34 - Liquid medicine discharge port, 35 - Siphon assembly; 351 - Negative pressure pipe, 352 - Siphon tube, 353 - Sealing reinforcement; 3531 - Rotating fastener, 3532 - Fixed connection pipe, 3533 - Fixed insertion pipe, 3534 - Sleeve, 3535 - Rotating table part, 3536 - Fastening cylinder part, 3537 - Clamping pipe, 3538 - Fixed ring part, 3539 - Connection ring part, 3540 - Rubber sealing layer 1, 3541 - Inclined guiding surface 1, 3542 - Inclined guiding surface 2, 3543 - Rubber sealing layer 2, 3544 - Guiding surface, 3545 - Bolt. Specific embodiments

[0023] To deepen the understanding of the present invention, the present invention will be further described in detail below in combination with embodiments and drawings. The embodiments are only used to explain the present invention and do not constitute a limitation on the protection scope of the present invention.

[0024] In the description of the present invention, it should be understood that the terms indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the structure or unit referred to must have a specific orientation. Therefore, it cannot be understood as a limitation to the present invention.

[0025] In the present invention, unless otherwise clearly specified and limited, terms such as "connection", "provided with", "having" 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 a direct connection. It can be connected through an intermediate medium. For those skilled in the art, the basic meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] An automatic liquid dispensing device, referring to Figure 1 , Figure 2 , includes a frame 1, a rotary drive structure 2 and a liquid dispensing control structure 3 placed on the frame 1. There is a liquid medicine discharge cylinder 4 on the frame 1; The rotary drive structure 2 includes a rotary disk 21 placed on the frame 1. There are multiple liquid medicine storage groups 22 evenly distributed in a circumferential manner on the rotary disk 21. There are also multiple liquid medicine discharge ports 23 on the rotary disk 21 that are sequentially connected to the liquid medicine storage groups 22. As the rotary disk 21 rotates circumferentially, the liquid medicine in the liquid medicine storage groups 22 is sequentially transmitted into the liquid medicine discharge cylinder 4 through the liquid medicine discharge ports 23; The liquid medicine control structure 3 includes a pneumatic diaphragm pump 31 placed on the frame 1 and multiple two-way three-way solenoid valves 32 arranged on the rotary disk 21. Each two-way three-way solenoid valve 32 is connected to the corresponding liquid medicine storage group 22 through a liquid discharge pipe 33, and each two-way three-way solenoid valve 32 is connected to the corresponding liquid medicine discharge port 34. The liquid medicine control structure 3 also includes a siphon assembly 35 placed in the liquid medicine storage group 22. The pneumatic diaphragm pump 31 pumps and presses the inside of the liquid medicine storage group 22 to make it in a negative pressure state. After the two-way three-way solenoid valve 32 is opened, the liquid medicine in the liquid medicine storage group 22 is siphoned by the siphon assembly 35 and passes through the liquid discharge pipe 33 to the corresponding liquid medicine discharge port 34.

[0027] In the present invention, multiple groups of sequentially corresponding liquid medicine storage groups 22, two-way three-way solenoid valves 32 and liquid medicine discharge ports 34 are arranged on the rotary drive structure 2. The rotation method is adopted to realize the automation and continuity of liquid dispensing, which is convenient for replenishing the liquid medicine in the liquid medicine storage group 22 without stopping the machine and improves the liquid dispensing efficiency.

[0028] On the basis of this embodiment, referring to Figure 3 , the liquid medicine storage group 22 includes a liquid medicine storage cylinder body 221 arranged on the upper end surface of the rotary disk 21 and a sampling cylinder body 222 placed beside the liquid medicine storage cylinder body 221; The siphon assembly 35 includes a negative pressure pipe 351 arranged on the rotary disk 21. One end of the negative pressure pipe 351 is connected to the pneumatic diaphragm pump 31, and the other end of the negative pressure pipe 351 is connected to the sampling cylinder body 222. The siphon assembly 35 also includes a siphon pipe 352 connecting the correspondingly arranged liquid medicine storage cylinder body 221 and the sampling cylinder body 222. The siphon pipe 352 is of a U-shaped structure. One end of the siphon pipe 352 extends into the liquid medicine storage cylinder body 221 from top to bottom, and the other end of the siphon pipe 352 extends into the sampling cylinder body 222 from top to bottom.

[0029] In the present invention, a sampling cylinder body 222 is arranged beside the liquid medicine storage cylinder body 221. A siphon tube 352 connects the liquid medicine storage cylinder body 221 and the sampling cylinder body 222. Under the pumping action of the negative pressure tube 351, the negative pressure inside the sampling cylinder body 222 and the liquid outlet pipe 33 is greater than that inside the siphon tube 352, avoiding the generation of vaporized water inside the siphon tube 352 or the separation of air from the water, and ensuring the connection performance of the siphon tube 352 and the automatic liquid dispensing efficiency.

[0030] On the basis of this embodiment, referring to Figure 4 , Figure 5 , the siphon tube 352 and the corresponding liquid medicine storage cylinder body 221 and the sampling cylinder body 222 are connected in a sealed and detachable manner through a sealing and reinforcement member 353.

[0031] Furthermore, the sealing and reinforcement member 353 includes a rotary fastening member 3531 arranged on the upper end faces of the liquid medicine storage cylinder body 221 and the sampling cylinder body 222. The upper end faces of the liquid medicine storage cylinder body 221 and the sampling cylinder body 222 both have vertically arranged fixed connection pipes 3532. A fixed insertion pipe 3533 penetrates through the fixed connection pipe 3532. The upper and lower ends of the fixed insertion pipe 3533 protrude from the ends of the fixed connection pipe 3532. A sleeve 3534 is sleeved on the end of the siphon tube 352. The rotary fastening member 3531 includes a rotary table portion 3535 and a fastening cylinder portion 3536 placed on the rotary table portion 3535. The fastening cylinder portion 3536 is in an embedded rotary connection with the corresponding liquid medicine storage cylinder body 221 or the sampling cylinder body 222 and is fixed through a bolt 3545. The sleeve 3534 extends into the fastening cylinder portion 3536 from top to bottom and is in threaded connection with the fastening cylinder portion 3536. The upper end of the fixed connection pipe 3532 has a concentric clamping pipe 3537. The inner diameter of the clamping pipe 3537 is greater than the inner diameter of the fixed connection pipe 3532. When the rotary fastening member 3531 rotates in thread with the sleeve 3534, the sleeve 3534 and the siphon tube 352 are displaced synchronously. The clamping pipe 3537 is embedded between the sleeve 3534 and the siphon tube 352. At this time, the upper end of the fixed insertion pipe 3533 extends into the siphon tube 352 and realizes a sealed fit under the clamping force of the cooperation between the sleeve 3534 and the clamping pipe 3537.

[0032] The siphon tube 352 in the present invention is detachably and hermetically connected to the liquid medicine storage cylinder body 221 and the sampling cylinder body 222 through the sealing and reinforcement member 353. By adopting the sealing and reinforcement member 353 with a special structure, the connection stability between the siphon tube 352 and the liquid medicine storage cylinder body 221 and the sampling cylinder body 222 is improved, avoiding the displacement of the siphon tube 352 during use. At the same time, the replacement of the siphon tube 352 can be realized without stopping the machine, further improving the automatic liquid dispensing efficiency.

[0033] On the basis of this embodiment, the sleeve 3534 includes a fixed ring portion 3538 fixedly connected to the end of the siphon 352 and a connecting ring portion 3539 disposed on the lower side of the fixed ring portion 3538. The connecting ring portion 3539 is concentric with the siphon 352 and there is a space for the clamping tube 3537 to vertically penetrate between the connecting ring portion 3539 and the siphon 352. Rubber sealing layers 3540 are provided on both side surfaces of the end of the siphon 352.

[0034] On the basis of this embodiment, the outer end face of the upper end of the clamping tube 3537 has an inclined guiding surface 3541, and the inner wall of the connecting ring portion 3539 has an inclined guiding surface 3542 that cooperates with the inclined guiding surface 3541. When the rotating fastener 3531 is in threaded engagement with the connecting ring portion 3539 of the sleeve 3534, the connecting ring portion 3539 is displaced in the direction of the rotating fastener 3531, and the inclined guiding surface 3541 and the inclined guiding surface 3542 cooperate and squeeze each other. At the same time, the end of the siphon 352 moves and cooperates between the clamping tube 3537 and the fixed insertion tube 3533, thereby completing the clamping and sealing cooperation between the fixed insertion tube 3533 and the clamping tube 3537.

[0035] During installation, the rotating fastener 3531 rotates as a whole. The fastening cylinder portion 3536 of the rotating fastener 3531 is in threaded engagement with the connecting ring portion 3539 of the corresponding sleeve 3534. The two ends of the siphon 352 move downward as a whole under the threaded engagement of the fastening cylinder portion 3536. At this time, the inclined guiding surface 3541 of the clamping tube 3537 and the inclined guiding surface 3542 on the inner wall of the connecting ring portion 3539 are squeezed and cooperate with each other. At the same time, the sealing fit between the fixed insertion tube 3533 and the siphon 352 is realized. After the cooperation between the sleeve 3534 and the fastening cylinder portion 3536 is realized, the vertical bolt 3545 is driven in to fixedly connect the rotating table portion 3535 with the liquid medicine storage cylinder 221 or the sampling cylinder 222.

[0036] It should be noted that the bottom of the rotating table portion 3535 is mutually embedded with the upper end surface of the liquid medicine storage cylinder 221 or the sampling cylinder 222, and a rotatable fit connection can be realized through the form of the mutual embedding of the convex platform or the groove, ensuring the position accuracy of the rotating table portion 3535 during rotation.

[0037] On the basis of this embodiment, rubber sealing layers 3543 are provided on both the inclined guiding surface 3541 and the inclined guiding surface 3542.

[0038] In this embodiment, the inclined guiding surface 3541 and the inclined guiding surface 3542 are mutually squeezed and in contact and cooperation, which plays a certain squeezing role in the cooperation between the siphon 352 and the fixed insertion tube 3533 after fitting, ensuring their close contact. At the same time, the setting of the rubber sealing layer 3540 and the rubber sealing layer 3543 further improves the sealing performance between the siphon 352 and the fixed insertion tube 3533.

[0039] On the basis of this embodiment, the inner wall of the upper end of the clamping tube 3537 has a guiding surface 3544 for vertically embedding the end of the siphon tube 352.

[0040] On the basis of this embodiment, a weighing sensor 5 is provided at the bottom of the liquid medicine discharging cylinder 4 on the frame 1, and the weighing sensor is electrically connected to the pneumatic diaphragm pump 31 and the two-way three-way solenoid valve 32.

[0041] The weighing sensor monitors the weight of the liquid medicine discharging cylinder 4 in real time. When the weight reaches the predetermined value set by the system, it means that the liquid medicine in the liquid medicine discharging cylinder 4 is prepared. At this time, the diaphragm pump 31 is started and the two-way three-way solenoid valve 32 is closed to end the liquid preparation. Replace the liquid medicine discharging cylinder 4 to be prepared, rotate the turntable 21 by a certain angle, and continue the next liquid preparation process. At this time, the liquid storage cylinder body 221 of the previous process can be refilled.

[0042] On the basis of this embodiment, the bottom of the frame 1 is provided with movable rollers, and the frame 1 is provided with a touch screen, an alarm lamp and a buzzer.

[0043] Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic liquid dispensing device, characterized in that: It includes a frame, a rotary drive structure and a liquid dispensing control structure placed on the frame. There is a liquid medicine discharge cylinder on the frame; The rotary drive structure includes a rotary disk placed on the frame. There are multiple liquid medicine storage groups evenly distributed in a circular pattern on the rotary disk. There are also multiple liquid medicine discharge ports on the rotary disk that are sequentially connected to the liquid medicine storage groups. As the rotary disk rotates circumferentially, the liquid medicine in the liquid medicine storage groups is sequentially transmitted into the liquid medicine discharge cylinder through the liquid medicine discharge ports; The liquid medicine control structure includes a pneumatic diaphragm pump placed on the frame and multiple two-way three-way solenoid valves arranged on the rotary disk. Each two-way three-way solenoid valve is connected to the corresponding liquid medicine storage group through a liquid outlet pipe and is connected to the corresponding liquid medicine discharge port. The liquid medicine control structure also includes a siphon assembly placed in the liquid medicine storage group. The pneumatic diaphragm pump sucks and presses the inside of the liquid medicine storage group to create a negative pressure state inside. After the two-way three-way solenoid valve is opened, the liquid medicine in the liquid medicine storage group is siphoned through the liquid outlet pipe to the corresponding liquid medicine discharge port under the siphon action of the siphon assembly.

2. The automatic liquid dispensing device according to claim 1, wherein: The liquid medicine storage group includes a liquid medicine storage cylinder body arranged on the upper end surface of the rotary disk and a sampling cylinder body placed beside the liquid medicine storage cylinder body; The siphon assembly includes a negative pressure pipe arranged on the rotary disk. One end of the negative pressure pipe is connected to the pneumatic diaphragm pump, and the other end is connected to the sampling cylinder body. The siphon assembly also includes a siphon pipe connecting the correspondingly arranged liquid medicine storage cylinder body and the sampling cylinder body. The siphon pipe is of a U-shaped structure. One end of the siphon pipe extends into the liquid medicine storage cylinder body from top to bottom, and the other end extends into the sampling cylinder body from top to bottom.

3. The automatic liquid dispensing device according to claim 2, wherein: The siphon pipe is hermetically and detachably connected to the corresponding liquid medicine storage cylinder body and sampling cylinder body through a sealing and reinforcement member.

4. The automatic liquid dispensing device according to claim 3, wherein: The sealing and reinforcement member includes a rotary fastening member arranged on the upper end surfaces of the liquid medicine storage cylinder body and the sampling cylinder body. There are vertically arranged fixed connection pipes on the upper end surfaces of the liquid medicine storage cylinder body and the sampling cylinder body. A fixed insertion pipe penetrates through the fixed connection pipes. The upper and lower ends of the fixed insertion pipe protrude from the ends of the fixed connection pipes. A sleeve is sleeved on the end of the siphon pipe. The rotary fastening member includes a rotary table part and a fastening cylinder part placed on the rotary table part. The fastening cylinder part is in an embedded rotary connection with the corresponding liquid medicine storage cylinder body or sampling cylinder body and is fixed by bolts. The sleeve extends into the fastening cylinder part from top to bottom and is threadedly connected to the fastening cylinder part. The upper end of the fixed connection pipe has a concentric clamping pipe. The inner diameter of the clamping pipe is larger than the inner diameter of the fixed connection pipe. When the rotary fastening member rotates threadedly with the sleeve, the sleeve and the siphon pipe move synchronously. The clamping pipe is embedded between the sleeve and the siphon pipe. At this time, the upper end of the fixed insertion pipe extends into the siphon pipe and is hermetically fitted under the clamping force of the sleeve and the clamping pipe.

5. The automatic liquid dispensing device according to claim 4, wherein: The casing includes a fixed ring portion fixedly connected to the end of the siphon pipe and a connecting ring portion disposed below the fixed ring portion. The connecting ring portion is concentric with the siphon pipe, and there is a space for the clamping pipe to vertically penetrate between the connecting ring portion and the siphon pipe. Rubber sealing layers I are provided on both side surfaces of the end of the siphon pipe.

6. The automatic liquid dispensing device according to claim 5, characterized in that: An inclined guiding surface I is provided on the outer end surface of the upper end of the clamping pipe, and an inclined guiding surface II that cooperates with the inclined guiding surface I is provided on the inner wall of the connecting ring portion. When the rotating fastener is in threaded cooperation with the connecting ring portion of the casing, the connecting ring portion displaces towards the rotating fastener, and the inclined guiding surface I and the inclined guiding surface II cooperate and extrude with each other. At the same time, the end of the siphon pipe moves and cooperates towards the space between the clamping pipe and the fixed insertion pipe, thereby completing the clamping and sealing cooperation between the fixed insertion pipe and the clamping pipe.

7. The automatic liquid dispensing device according to claim 6, wherein: Rubber sealing layers II are provided on both the inclined guiding surface I and the inclined guiding surface II.

8. The automatic liquid dispensing device according to claim 7, wherein: A guiding surface for vertically embedding the end of the siphon pipe is provided on the inner wall of the upper end of the clamping pipe.

9. The automatic liquid dispensing device according to claim 8, wherein: A weighing sensor is provided at the position of the bottom of the liquid medicine discharging cylinder on the frame, and the weighing sensor is electrically connected to the pneumatic diaphragm pump and the two-position three-way solenoid valve.

10. The automatic liquid dispensing device according to claim 9, wherein: Moving rollers are provided at the bottom of the frame, and a touch control screen, an alarm lamp, and a buzzer are provided on the frame.

Images