A solvent bottle automatic replacement device for physicochemical sample pretreatment

Abstract

The application discloses a kind of solvent bottle automatic replacement equipment for physical and chemical sample pretreatment, including solvent supply device, transport car and mechanical arm, solvent supply device includes rack, first drive component, second drive component, solvent bottle placement component, sampling needle component;Solvent bottle placement component includes solvent bottle placement support, first placement slot and liquid level sensor;Sampling needle component includes the sampling needle that can be extended into solvent bottle;Transport car is equipped with second placement slot, and mechanical arm is installed in transport car;Mechanical arm is equipped with the mechanical gripper component for grabbing solvent bottle.When liquid level sensor detects that the liquid level of solvent bottle reaches preset liquid level height, second drive component drives sampling needle component vertically upward movement, first drive component drives solvent bottle placement component horizontal outward movement, and solvent supply device, transport car and mechanical arm cooperate to realize the full-automatic replacement of solvent bottle, and the safety is better.

Description

Technical Field

[0001] This invention relates to the field of physicochemical sample pretreatment equipment, specifically to an automatic solvent bottle replacement device for physicochemical sample pretreatment. Background Technology

[0002] Solvent bottle supply and recycling is a step in the pretreatment of physicochemical samples. Laboratory operators typically determine when a solvent bottle needs replacing by periodically checking if the reagent is empty. However, this method can lead to delays in detecting empty solvent bottles, causing the entire system to report a reagent shortage and halt operation. Similarly, during waste liquid recycling, operators often rely on periodically checking if the solvent bottle is full to determine if a new bottle is needed. This can also lead to delays in detection, resulting in the unsafe risk of overflowing waste liquid.

[0003] Currently, there is no commercially available sample pretreatment equipment for physicochemical samples that can automatically replace solvent bottles to solve this problem. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide an automatic solvent bottle replacement device for the pretreatment of physicochemical samples, so as to solve the problem that existing devices for the pretreatment of physicochemical samples cannot achieve automatic solvent bottle replacement.

[0005] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows: An automatic solvent bottle replacement device for pretreatment of physicochemical samples includes: A solvent supply device includes a frame, a first drive assembly, a second drive assembly, and a first controller mounted on the frame, a solvent bottle placement assembly slidably connected to the frame and driven by the first drive assembly to reciprocate horizontally, and a sampling needle assembly slidably connected to the frame and driven by the second drive assembly to reciprocate vertically. The solvent bottle placement assembly includes a solvent bottle placement bracket, which has a first placement slot for placing solvent bottles and a level sensor for detecting the liquid level of the solvent bottles in the first placement slot. The sampling needle assembly includes a sampling needle driven to move vertically, the sampling needle being able to extend into the interior of a solvent bottle located in the first placement slot to draw solvent. The first controller is communicatively connected to the level sensor and controls the operation of the first drive assembly and the second drive assembly. A solvent bottle conveying device includes a movable conveyor vehicle, a robotic arm mounted on the conveyor vehicle, and a second controller; the conveyor vehicle is provided with a second placement slot for placing solvent bottles; the movable end of the robotic arm is provided with a robotic gripper assembly for grasping solvent bottles; the second controller is communicatively connected to the liquid level sensor and controls the movement of the conveyor vehicle, the robotic arm, and the robotic gripper assembly. When the liquid level sensor detects that the liquid level in the solvent bottle in the first placement tank has reached the preset liquid level height, it sends a control signal. In response to the control signal, the first controller controls the second drive component to drive the sampling needle assembly to move vertically upward so that the sampling needle extends out of the bottle opening of the solvent bottle in the first placement slot. The first controller also responds to the control signal to control the first drive component to drive the solvent bottle placement component to move horizontally away from the sampling needle assembly so that the sampling needle assembly clears the space above the first placement slot. The second controller, in response to the control signal, controls the transport vehicle to move to a position directly opposite the solvent bottle placement assembly. The second controller also, in response to the control signal, controls the movement of the robotic arm and the opening and closing of the robotic gripper assembly to transfer the solvent bottle between the first placement slot and the second placement slot.

[0006] Furthermore, the solvent bottle placement bracket is provided with a vacuum suction assembly located at the bottom of the first placement slot for holding or releasing the solvent bottle in the first placement slot; the mechanical gripper assembly includes a pair of grippers for holding or releasing the cap of the solvent bottle, and a rotation drive for driving the pair of grippers to rotate to open the cap of the solvent bottle; The first controller responds to the control signal by controlling the vacuum holding assembly to hold the bottom of the solvent bottle; the second controller responds to the control signal by controlling a pair of grippers of the mechanical claw assembly to grip and rotate to open the cap of the solvent bottle.

[0007] Furthermore, the solvent bottle placement assembly also includes a cap placement position located on one side of the first placement slot, and the second controller, in response to the control signal, controls the movement of the robotic arm and the opening and closing of a pair of grippers of the robotic claw assembly to transfer the cap of the solvent bottle to the cap placement position.

[0008] Furthermore, the solvent bottle placement bracket is provided with a plurality of first placement slots, the solvent bottle includes a reagent bottle for containing the reagent to be added, and the liquid level sensor includes a low liquid level sensor located on the lower side of the reagent bottle; when the low liquid level sensor detects that the liquid level in the reagent bottle has reached a first preset liquid level height, it sends a low liquid level signal. The first controller and the second controller cooperate in response to the low liquid level signal to first grab the reagent bottle with low liquid level in the first placement tank and transfer it to the second placement tank, then grab the reagent bottle with high liquid level in the second placement tank and transfer it to the first placement tank and open the cap of the reagent bottle with high liquid level, and finally control the sampling needle to extend into the reagent bottle with high liquid level located in the first placement tank.

[0009] Furthermore, the solvent bottle includes a waste liquid collection bottle for collecting waste liquid after testing, and the liquid level sensor includes a high liquid level sensor located on the upper side of the waste liquid collection bottle; when the high liquid level sensor detects that the liquid level in the waste liquid collection bottle reaches a second preset liquid level height, it sends a high liquid level signal. The first controller and the second controller cooperate in response to the high liquid level signal to first grab the waste liquid collection bottle with a high liquid level in the first placement tank and transfer it to the second placement tank, then grab the waste liquid collection bottle with a low liquid level in the second placement tank and transfer it to the first placement tank and open the bottle cap of the waste liquid collection bottle with a low liquid level, and finally control the sampling needle to extend into the waste liquid collection bottle with a low liquid level located in the first placement tank.

[0010] Furthermore, there are multiple vacuum suction cups, each located at the bottom of one of the first placement slots. The solvent bottle placement bracket is also equipped with a vacuum generator and a solenoid valve assembly. The multiple vacuum suction cups are connected to the vacuum generator through vacuum pipelines. The solenoid valve assembly is equipped with multiple solenoid valves for controlling the opening and closing of each vacuum pipeline.

[0011] Furthermore, the sampling needle assembly comprises multiple sets, which are mounted on the same lifting plate. The second driving component drives the lifting plate and the multiple sets of sampling needle assemblies to perform vertical lifting movements synchronously. The sampling needle assembly includes a multi-way valve seat mounted on the lifting plate, multiple sampling needles communicating with the multi-way valve seat, a bottle cap fixedly connected to the lifting plate and positioned corresponding to the multi-way valve seat, and a pipeline interface located on the multi-way valve seat and communicating with the multiple sampling needles respectively. The multiple sampling needles pass through the bottle cap, which is used to block the bottle opening of the solvent bottle.

[0012] Furthermore, the sampling needle assembly also includes a bottle mouth plug fitted around the lower outer periphery of the bottle mouth cap, and multiple pipeline interfaces connected to the same multi-port valve seat pass through the bottle mouth plug, which is used to insert into the bottle mouth of the solvent bottle.

[0013] Furthermore, the bottle cap is equipped with a magnet, the bottle cap is equipped with an iron block, and the bottle cap and the bottle cap are magnetically connected.

[0014] Furthermore, it also includes a host computer, the liquid level sensor is communicatively connected to the host computer, and the host computer is communicatively connected to the first controller and the second controller.

[0015] The technical solution of this invention has the following advantages: 1. The automatic solvent bottle replacement device for pretreatment of physicochemical samples provided by the present invention sends a control signal when the liquid level sensor detects that the liquid level of the solvent bottle in the first placement tank has reached a preset liquid level height. First, the second drive component drives the sampling needle assembly to move vertically upward so that the sampling needle extends from the mouth of the reagent bottle in the first placement tank. Then, the first drive component drives the solvent bottle placement assembly to move horizontally away from the sampling needle assembly so that the sampling needle assembly clears the space above the first placement tank. Next, the transport vehicle moves to the position directly opposite the solvent bottle placement assembly. The robotic arm and robotic gripper assembly cooperate to transfer the solvent bottle between the first and second placement tanks. With this configuration, the solvent bottle replacement on the solvent bottle placement assembly is fully automatic, and safety problems caused by excessively low or high liquid levels in the reagent bottles are less likely to occur.

[0016] 2. The automatic solvent bottle replacement device for pretreatment of physicochemical samples provided by the present invention includes a mechanical gripper assembly comprising a pair of grippers for holding or releasing the cap of the solvent bottle, and a rotary drive for driving the pair of grippers to rotate to open the cap of the solvent bottle. This device can automatically open the cap during reagent bottle replacement without manual opening, thus achieving a higher degree of automation.

[0017] 3. The automatic solvent bottle replacement device for physicochemical sample pretreatment provided by the present invention can automatically place opened bottle caps without the need for manual collection of bottle caps, thus achieving a higher degree of automation.

[0018] 4. The automatic solvent bottle replacement device for physicochemical sample pretreatment provided by the present invention, when the low liquid level sensor detects that the liquid level in the reagent bottle has reached the first preset liquid level height, the robotic arm and its robotic claw assembly cooperate to first grab the reagent bottle with low liquid level in the first placement tank and transfer it to the second placement tank, then grab the reagent bottle with high liquid level in the second placement tank and transfer it to the first placement tank and open the cap of the reagent bottle with high liquid level, and finally control the sampling needle to extend into the reagent bottle with high liquid level in the first placement tank to realize the automatic replacement of the low liquid level reagent bottle, and the sampling needle can be automatically reconnected after the reagent bottle is replaced to realize automatic liquid supply, with a higher degree of automation.

[0019] 5. The automatic solvent bottle replacement device for pretreatment of physicochemical samples provided by the present invention, when the high liquid level sensor detects that the liquid level in the waste liquid collection bottle reaches a second preset liquid level height, the robotic arm and its robotic claw assembly cooperate to first grab the waste liquid collection bottle with a high liquid level in the first placement tank and transfer it to the second placement tank, then grab the waste liquid collection bottle with a low liquid level in the second placement tank and transfer it to the first placement tank and open the cap of the waste liquid collection bottle with a low liquid level, and finally control the sampling needle to extend into the waste liquid collection bottle with a low liquid level located in the first placement tank. This can realize the automatic replacement of the high liquid level waste liquid collection bottle, and the sampling needle can be automatically reconnected after the waste liquid collection bottle is replaced, realizing the automatic collection of waste liquid, with a higher degree of automation. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a front view of the automatic solvent bottle replacement device for pretreatment of physicochemical samples in an embodiment of the present invention; Figure 2 This is a three-dimensional structural diagram of an automatic solvent bottle replacement device for pretreatment of physicochemical samples in an embodiment of the present invention; Figure 3 This is a three-dimensional structural diagram of the solvent supply device in an embodiment of the present invention; Figure 4 This is a top view of the solvent supply device in an embodiment of the present invention after omitting the top cover of the solvent bottle placement bracket; Figure 5 for Figure 4 Side sectional view; Figure 6 This is a top view of the sampling needle assembly in an embodiment of the present invention; Figure 7 This is a side sectional view of the sampling needle assembly in an embodiment of the present invention; Figure 8 This is a three-dimensional structural diagram of the robotic arm and robotic gripper assembly in an embodiment of the present invention.

[0022] Explanation of reference numerals in the attached drawings: 100, Solvent supply device; 110, Frame; 120, First drive assembly; 130, Second drive assembly; 140, Solvent bottle placement assembly; 141, Solvent bottle placement bracket; 142, First placement slot; 143, Liquid level sensor; 143a, Low liquid level sensor; 143b, High liquid level sensor; 150, Sampling needle assembly; 151, Lifting plate; 152, Multi-way valve seat; 153, Sampling needle. 154. Needle; 155. Bottle cap; 156. Pipeline interface; 157. Bottle stopper; 158. Magnet; 159. Iron block; 160. Vacuum holding assembly; 161. Vacuum generator; 162. Solenoid valve assembly; 163. Vacuum suction cup; 200. Conveyor cart; 211. Second placement slot; 300. Robotic arm; 400. Mechanical claw assembly; 410. Gripper; 420. Rotary drive component; 500. Solvent bottle; 510. Bottle cap. Detailed Implementation

[0023] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. 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.

[0024] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0026] like Figures 1-8An automatic solvent bottle replacement device for pretreatment of physicochemical samples is shown, including a solvent supply device 100, a solvent bottle conveying device and a host computer (not shown). The solvent bottle conveying device includes a movable conveying cart 200 and a robotic arm 300 installed on the conveying cart 200. The movable end of the robotic arm 300 is provided with a mechanical claw assembly 400 for gripping the solvent bottle 500.

[0027] like Figure 2 and Figure 3 As shown, the solvent supply device 100 includes a frame 110, a first drive assembly 120, a second drive assembly 130, a solvent bottle placement assembly 140, a sampling needle assembly 150, and a first controller. The first drive assembly 120, the second drive assembly 130, and the first controller are all mounted on the frame 110. The solvent bottle placement assembly 140 is slidably connected to the frame 110 and is driven by the first drive assembly 120 to reciprocate horizontally. The sampling needle assembly 150 is slidably connected to the frame 110 and is driven by the second drive assembly 130 to reciprocate vertically. The first drive assembly 120 and the second drive assembly 130 can be cylinders or linear motor modules.

[0028] like Figure 2 and Figure 3 As shown, the solvent bottle placement assembly 140 includes a solvent bottle placement bracket 141, which has a first placement groove 142 for placing solvent bottles 500 and a liquid level sensor 143 for detecting the liquid level of the solvent bottles 500 in the first placement groove 142. The sampling needle assembly 150 includes a sampling needle 153 driven to reciprocate vertically. The sampling needle 153 can extend into the interior of the solvent bottle 500 located in the first placement groove 142 to draw solvent from the solvent bottle 500 or discharge waste liquid into the interior of the solvent bottle 500. The liquid level sensor 143 and the first controller are both communicatively connected to a host computer. The liquid level signal detected by the liquid level sensor 143 is sent to the host computer, and the first controller is controlled by the control commands issued by the host computer to control the movement of the first drive assembly 120 and the second drive assembly 130.

[0029] like Figure 2 As shown, the conveyor 200 is provided with a second placement slot 211 for placing solvent bottles 500, and the movable end of the robotic arm 300 is provided with a mechanical gripper assembly 400 for grasping the solvent bottles 500. The second controller is connected to the liquid level sensor 143 via a host computer. The liquid level signal detected by the liquid level sensor 143 is sent to the host computer, and the second controller is controlled by the control commands issued by the host computer to control the movement of the conveyor 200, the robotic arm 300, and the mechanical gripper assembly 400.

[0030] When the liquid level sensor 143 detects that the liquid level of the solvent bottle 500 in the first placement tank 142 has reached the preset liquid level height, it sends a control signal. After receiving the control signal from the liquid level sensor 143, the host computer sends corresponding control commands to the first controller and the second controller. In response to the control command, the first controller first controls the second drive assembly 130 to drive the sampling needle assembly 150 to move vertically upward so that the sampling needle 153 extends out of the bottle opening of the solvent bottle 500 in the first placement tank 142. Then, it controls the first drive assembly 120 to drive the solvent bottle placement assembly 140 to move horizontally away from the sampling needle assembly 150 so that the sampling needle assembly 150 clears the space above the first placement tank 142. Simultaneously, in response to a control command, the second controller controls the conveyor 200 to move to a position directly opposite the solvent bottle placement assembly 140, and then controls the robotic arm 300 to move directly above the first placement slot 142. The robotic arm 300 controls the robotic gripper assembly 400 to descend, and the pair of grippers 410 of the robotic gripper assembly 400 grasp the reagent bottle. Afterward, the robotic arm 300 controls the robotic gripper assembly 400, which is holding the solvent bottle 500, to move directly above the second placement slot 211, and the pair of grippers 410 of the robotic gripper assembly 400 release the solvent bottle 500. 0. Solvent bottle 500 is placed in the second placement slot 211 of the conveyor 200; then, the robotic arm 300 and the robotic gripper assembly 400 repeat the opposite action, placing the solvent bottle 500 in the second placement slot 211 into the first placement slot 142, realizing the automatic replacement of the solvent bottle 500; finally, the first drive assembly 120 drives the solvent bottle placement assembly 140 to move horizontally back to the initial position, and the second drive assembly 130 drives the sampling needle assembly 150 to move vertically downward so that the sampling needle 153 extends into the mouth of the solvent bottle 500. This automatic solvent bottle replacement device for physicochemical sample pretreatment can realize fully automatic replacement of the solvent bottle 500 on the solvent bottle placement assembly 140, and is less likely to cause safety problems caused by reagent bottle liquid levels being too low or too high.

[0031] like Figure 3 , Figure 4 and Figure 8As shown, since the mouths of some solvent bottles 500 containing reagents or waste liquid are sealed with caps 510, the caps 510 need to be put on before the solvent bottles 500 to be transferred in the first placement slot 142 are transferred. After the solvent bottles 500 filled with reagents are transferred to the first placement slot 142, the caps 510 of the solvent bottles 500 also need to be opened before the sampling needle 153 can be inserted into the interior of the solvent bottles 500. In some embodiments, the solvent bottle placement bracket 141 is provided with a cap placement position on one side of the first placement slot 142, and the caps 510 of the solvent bottles 500 are placed in the cap placement position. The solvent bottle placement bracket 141 is provided with a vacuum suction cup 163 located at the bottom of the first placement slot 142 for holding or releasing the solvent bottles 500 in the first placement slot 142; the mechanical gripper assembly 400 includes a rotary drive 420 for driving a pair of grippers 410 to rotate to open or tighten the caps 510 of the solvent bottles 500. Before the robotic arm 300 and the robotic gripper assembly 400 transfer the solvent bottle 500 into the first placement slot 142, the vacuum suction cup 163 sucks on the bottom of the reagent bottle, the robotic gripper assembly 400 grabs the bottle cap 510 from the cap placement position and places it on the bottle mouth of the solvent bottle 500 in the first placement slot 142, and then the rotation drive 420 drives a pair of grippers 410 to rotate, and the pair of grippers 410 drive the bottle cap 510 to be screwed onto the bottle mouth of the solvent bottle 500. After the robotic arm 300 and the robotic gripper assembly 400 place the solvent bottle 500 from the second placement slot 211 into the first placement slot 142, the vacuum suction cup 163 picks up the bottom of the solvent bottle 500. A pair of grippers 410 of the robotic gripper assembly 400 grips the bottle cap 510 of the solvent bottle 500. The rotary drive unit 420 drives the pair of grippers 410 to rotate, causing the bottle cap 510 to rotate and release from the bottle opening of the solvent bottle 500. The robotic gripper assembly 400 then grips the released bottle cap 510 and places it in the bottle cap placement position. This configuration allows for automatic opening of the bottle cap 510 during solvent bottle 500 replacement, eliminating the need for manual opening and collection of the bottle cap 510, resulting in a higher degree of automation.

[0032] like Figure 2 and Figure 3 As shown, the solvent bottle placement bracket 141 has six first placement slots 142 arranged in a 2×3 pattern, each first placement slot 142 can hold one solvent bottle 500 individually. There are six solvent bottles 500, including three reagent bottles for containing reagents to be added and three waste liquid collection bottles for collecting waste liquid after testing. The liquid level sensor 143 includes a low liquid level sensor 143 located below the reagent bottles and a high liquid level sensor 143 located above the waste liquid collection bottles.

[0033] When the low liquid level sensor 143 detects that the liquid level in the reagent bottle has reached the first preset liquid level height, it sends a low liquid level signal to the host computer. The host computer sends a first control command to the first controller and the second controller according to the low liquid level signal. In response to the first control command, the first controller first controls the second drive assembly 130 to drive the sampling needle assembly 150 to move vertically upward so that the sampling needle 153 extends out of the mouth of the solvent bottle 500 in the first placement slot 142. Then, it controls the first drive assembly 120 to drive the solvent bottle placement assembly 140 to move horizontally away from the sampling needle assembly 150 so that the sampling needle assembly 150 clears the space above the first placement slot 142. Simultaneously, in response to the first control command, the second controller controls the conveyor 200 to move to a position directly opposite the solvent bottle placement assembly 140, and then controls the robotic arm 300 to move directly above the solvent bottle placement assembly 140. The robotic arm 300 controls the robotic gripper assembly 400 to descend, and the robotic gripper assembly 400 grabs the bottle cap 510 on the bottle cap placement position and screws it onto the mouth of the reagent bottle with a low liquid level in the first placement slot 142. After that, the robotic arm 300 controls the robotic gripper assembly 400, which is holding the reagent bottle, to move directly above the second placement slot 211. The pair of grippers 410 of the robotic gripper assembly 400 release the reagent bottle, and the reagent bottle is placed in the second placement slot 211 of the conveyor 200. Then, the robotic arm 300 and the robotic gripper assembly 400 repeat the opposite actions, placing the reagent bottle in the second placement slot 211 into the first placement slot 142 and opening the bottle cap 510, thus realizing the automatic replacement of the reagent bottle; finally, the first drive assembly 120 drives the solvent bottle placement assembly 140 to move horizontally back to the initial position, and the second drive assembly 130 drives the sampling needle assembly 150 to move vertically downward so that the sampling needle 153 extends into the mouth of the reagent bottle, thus realizing the automatic replacement of the low liquid level reagent bottle, and the sampling needle 153 can be automatically reconnected after the reagent bottle is replaced, realizing automatic liquid supply, with a higher degree of automation.

[0034] When the high liquid level sensor 143 detects that the liquid level in the waste liquid collection bottle has reached the second preset liquid level height, it sends a high liquid level signal. The host computer sends a second control command to the first controller and the second controller based on the high liquid level signal. In response to the second control command, the first controller first controls the second drive assembly 130 to drive the sampling needle assembly 150 to move vertically upward so that the sampling needle 153 extends out of the bottle mouth of the solvent bottle 500 in the first placement slot 142. Then, it controls the first drive assembly 120 to drive the solvent bottle placement assembly 140 to move horizontally away from the sampling needle assembly 150 so that the sampling needle assembly 150 clears the space above the first placement slot 142. Simultaneously, in response to the second control command, the second controller controls the conveyor 200 to move to a position directly opposite the solvent bottle placement assembly 140, and then controls the robotic arm 300 to move directly above the solvent bottle placement assembly 140. The robotic arm 300 controls the robotic gripper assembly 400 to descend, and the robotic gripper assembly 400 grabs the bottle cap 510 on the bottle cap placement position and screws it onto the mouth of the waste liquid collection bottle with a low liquid level in the first placement slot 142. After that, the robotic arm 300 controls the robotic gripper assembly 400, which is holding the waste liquid collection bottle, to move directly above the second placement slot 211. The pair of grippers 410 of the robotic gripper assembly 400 release the waste liquid collection bottle, and the waste liquid collection bottle is placed in the second placement slot 211 of the conveyor 200. Then, the robotic arm 300 and the robotic gripper assembly 400 repeat the opposite actions, placing the waste liquid collection bottle in the second placement slot 211 into the first placement slot 142 and opening the bottle cap 510 of the waste liquid collection bottle to realize the automatic replacement of the waste liquid collection bottle; finally, the first drive assembly 120 drives the solvent bottle placement assembly 140 to move horizontally back to the initial position, and the second drive assembly 130 drives the sampling needle assembly 150 to move vertically downward so that the sampling needle 153 extends into the bottle mouth of the waste liquid collection bottle, realizing the automatic replacement of the low liquid level reagent bottle, and the sampling needle 153 can be automatically reconnected after the reagent bottle is replaced to realize the automatic collection of waste liquid, with a higher degree of automation.

[0035] like Figure 4 and Figure 5 As shown, there are six vacuum suction cups 163, which are located at the bottom of the six first placement slots 142. The solvent bottle placement bracket 141 is also equipped with a vacuum generator 161 and a solenoid valve assembly 162. The six vacuum suction cups 163 are connected to the vacuum generator 161 through vacuum lines, and the solenoid valve assembly 162 is equipped with six solenoid valves for controlling the on / off state of each vacuum line.

[0036] like Figure 6 and Figure 7As shown, there are multiple sets of sampling needle assemblies 150, which are mounted on the same lifting plate 151. The second drive assembly 130 drives the lifting plate 151 and the multiple sets of sampling needle assemblies 150 to perform vertical lifting and lowering movements synchronously. The sampling needle assembly 150 includes a multi-way valve seat 152 mounted on the lifting plate 151, multiple sampling needles 153 communicating with the multi-way valve seat 152, a bottle mouth cap 154 ​​fixedly connected to the lifting plate 151 and positioned corresponding to the multi-way valve seat 152, and a pipeline interface 155 located on the multi-way valve seat 152 and communicating with the multiple sampling needles 153 respectively. The multiple sampling needles 153 pass through the bottle mouth cap 154, which is used to block the bottle mouth of the solvent bottle 500. The sampling needle assembly 150 also includes a bottle mouth plug 156 fitted around the lower outer periphery of the bottle mouth cap 154. Eight sampling needles 153 connected to the same multi-port valve seat 152 all pass through the bottle mouth plug 156, which is used to insert into the bottle mouth of the solvent bottle 500. The bottle mouth plug 156 is equipped with a magnet 157, and the bottle mouth cap 154 ​​is equipped with an iron block 158. The bottle mouth plug 156 and the bottle mouth cap 154 ​​are magnetically connected. The detachable design of the bottle mouth plug 156 facilitates cleaning after removal. The magnetic detachment of the bottle mouth plug 156 allows for easy removal of the bottle mouth plug 156 with the magnet 157 from the bottle mouth cap 154 ​​with the iron block 158, enabling quick cleaning.

[0037] The automatic solvent bottle replacement device for physicochemical sample pretreatment operates as follows: The process of automatically replacing 500 solvent bottles is as follows: Step 1: When the solvent supply device 100 receives the control command from the host computer, the second drive component 130 drives the multiple sampling needle components 150 to rise to the highest position, and the first drive component 120 drives the solvent bottle placement component 140 to move to the position of the docking conveyor 200.

[0038] Step 2: The conveyor 200 places the solvent bottle 500 filled with solvent into the first placement slot 142 corresponding to the solvent bottle placement bracket 141 via the robotic arm 300. The vacuum generator 161 is started and switches the solenoid valve group 162 on the corresponding solvent bottle 500 to generate a vacuum negative pressure on the vacuum suction cup 163 at the bottom of the solvent bottle 500, which sucks up the solvent bottle 500. Then the robotic claw assembly 400 on the conveyor 200 opens the cap of the solvent bottle 500 and places the cap 510 in the cap placement position.

[0039] Step 3: Repeat Step 2 multiple times to place multiple solvent bottles 500 onto the corresponding first placement slot 142, and complete the cap opening action. Switch the solenoid valve to break the vacuum at the bottom of the solvent bottle 500.

[0040] Step 4: The first drive assembly 120 drives the solvent bottle placement assembly 140 to move to the initial position, and the second drive assembly 130 drives the multiple sampling needle assembly 150 to descend. The sampling needle 153 extends into the bottle mouth of the solvent bottle 500, and the solvent is supplied to multiple liquid addition modules through the multiple sampling needles 153, the multi-port valve seat 152 and the pipeline interface 155.

[0041] Step 5: When the liquid level sensor 143 corresponding to the solvent bottle 500 on the solvent bottle placement bracket 141 sends a low liquid level signal, the low liquid level signal is transmitted to the host computer, and the conveyor 200 replaces the empty solvent bottle 500 with the solvent supply device 100 again. Steps 1 to 4 are repeated to complete the replacement of the empty solvent bottle 500.

[0042] In summary, the automatic solvent bottle replacement device for physicochemical sample pretreatment provided by this invention features a solvent bottle 500 in the first placement slot 142 of the solvent bottle placement bracket 141 with an automatic liquid level sensing function. When the liquid level of the solvent bottle 500 in the first placement slot 142 is detected to be higher than the upper limit high liquid level value or lower than the lower limit low liquid level value, a control signal is automatically issued. The solvent supply device 100, the conveyor trolley 200, and the robotic arm 300 work together to automatically replace the solvent bottle 500. Moreover, during the replacement of the solvent bottle 500, the bottle cap 510 of the solvent bottle 500 can be automatically tightened, loosened, and placed, resulting in a higher degree of automation. In addition, since there are multiple sets of sampling needle assemblies 150, each set of sampling needle assemblies 150 includes multiple sampling needles 153, multi-channel liquid sampling or waste liquid collection can be achieved.

[0043] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. An automatic solvent bottle changing device for pretreatment of physicochemical samples, characterized in that, include: A solvent supply device (100) includes a frame (110), a first drive assembly (120) and a second drive assembly (130) mounted on the frame (110), a solvent bottle placement assembly (140) slidably connected to the frame (110) and driven by the first drive assembly (120) to reciprocate in the horizontal direction, and a sampling needle assembly (150) slidably connected to the frame (110) and driven by the second drive assembly (130) to reciprocate in the vertical direction; the solvent bottle placement assembly (140)... 0) includes a solvent bottle placement bracket (141) having a plurality of first placement slots (142) for placing solvent bottles (500) and a liquid level sensor (143) for detecting the liquid level of the solvent bottles (500) in the first placement slots (142); the sampling needle assembly (150) includes a sampling needle (153) driven to move along the vertical direction, the sampling needle (153) being able to extend into the interior of the solvent bottle (500) located in the first placement slots (142); A solvent bottle conveying device includes a movable conveyor (200) and a robotic arm (300) mounted on the conveyor (200); the conveyor (200) is provided with a second placement slot (211) for placing solvent bottles (500); the movable end of the robotic arm (300) is provided with a mechanical gripper assembly (400) for gripping the solvent bottles (500); When the liquid level sensor (143) detects that the liquid level of the solvent bottle (500) in the first placement slot (142) has reached a preset liquid level height, it sends a control signal; the second drive assembly (130) drives the sampling needle assembly (150) to move vertically upward so that the sampling needle (153) extends out of the bottle mouth of the solvent bottle (500) in the first placement slot (142); the first drive assembly (120) drives the solvent bottle placement assembly (140) to move horizontally away from the sampling needle assembly (150) so that the sampling needle assembly (150) clears the space above the first placement slot (142); the robotic arm (300) and the robotic gripper assembly (400) thereon cooperate to transfer the solvent bottle (500) between the first placement slot (142) and the second placement slot (211); The solvent bottle (500) includes a reagent bottle for containing the reagent to be added. The liquid level sensor (143) includes a low liquid level sensor (143a) located on the lower side of the reagent bottle. When the low liquid level sensor (143a) detects that the liquid level in the reagent bottle reaches a first preset liquid level height, the robotic arm (300) and the robotic gripper assembly (400) on it cooperate to first grab the reagent bottle with a low liquid level in the first placement slot (142) and transfer it to the second placement slot (211), then grab the reagent bottle with a high liquid level in the second placement slot (211) and transfer it to the first placement slot (142) and open the bottle cap (510) of the reagent bottle with a high liquid level. Finally, the sampling needle (153) is controlled to extend into the reagent bottle with a high liquid level located in the first placement slot (142). The solvent bottle (500) includes a waste liquid collection bottle for collecting waste liquid after testing. The liquid level sensor (143) includes a high liquid level sensor (143b) located on the upper side of the waste liquid collection bottle. When the high liquid level sensor (143b) detects that the liquid level in the waste liquid collection bottle reaches a second preset liquid level height, the robotic arm (300) and the robotic claw assembly (400) on it cooperate to first grab the waste liquid collection bottle with a high liquid level in the first placement slot (142) and transfer it to the second placement slot (211). Then, the robotic arm grabs the waste liquid collection bottle with a low liquid level in the second placement slot (211) and transfers it to the first placement slot (142) and opens the bottle cap (510) of the waste liquid collection bottle with a low liquid level. Finally, the sampling needle (153) is controlled to extend into the interior of the waste liquid collection bottle with a low liquid level located in the first placement slot (142).

2. The automatic solvent bottle changing device for pretreatment of physicochemical samples according to claim 1, characterized in that, The solvent bottle placement bracket (141) is provided with a vacuum suction cup (163) located at the bottom of the first placement groove (142) for holding or releasing the solvent bottle (500) in the first placement groove (142); the mechanical claw assembly (400) includes a pair of grippers (410) for gripping or releasing the cap (510) of the solvent bottle (500), and a rotation drive (420) for driving the pair of grippers (410) to rotate to open the cap (510) of the solvent bottle (500); when the liquid level sensor (143) detects that the liquid level of the solvent bottle (500) in the first placement groove (142) reaches a preset liquid level height, a control signal is issued; the vacuum suction cup (163) holds the bottom of the solvent bottle (500), and the pair of grippers (410) of the mechanical claw assembly (400) grips and rotates to open the cap (510) of the solvent bottle (500).

3. The automatic solvent bottle changing device for pretreatment of physicochemical samples according to claim 2, characterized in that, The solvent bottle placement assembly (140) also includes a cap placement position located on one side of the first placement slot (142), and the mechanical gripper assembly (400) is capable of transferring the cap (510) between the bottle opening of the solvent bottle (500) and the cap placement position.

4. The automatic solvent bottle changing device for pretreatment of physicochemical samples according to claim 2, characterized in that, There are multiple vacuum suction cups (163), and the multiple vacuum suction cups (163) are respectively located at the bottom of multiple first placement slots (142). The solvent bottle placement bracket (141) is also equipped with a vacuum generator (161) and a solenoid valve group (162). The multiple vacuum suction cups (163) are respectively connected to the vacuum generator (161) through vacuum pipelines. The solenoid valve group (162) is provided with multiple solenoid valves for controlling the opening and closing of each vacuum pipeline.

5. The automatic solvent bottle changing device for pretreatment of physicochemical samples according to claim 1, characterized in that, The sampling needle assembly (150) has multiple sets, and the multiple sets of sampling needle assemblies (150) are installed on the same lifting plate (151). The second driving assembly (130) drives the lifting plate (151) and the multiple sets of sampling needle assemblies (150) to perform vertical lifting and lowering movements synchronously. The sampling needle assembly (150) includes a multi-way valve seat (152) installed on the lifting plate (151), multiple sampling needles (153) communicating with the multi-way valve seat (152), a bottle cap (154) fixedly connected to the lifting plate (151) and corresponding to the position of the multi-way valve seat (152), and a pipeline interface (155) provided on the multi-way valve seat (152) and communicating with the multiple sampling needles (153) respectively. The multiple sampling needles (153) pass through the bottle cap (154), and the bottle cap (154) is used to block the bottle mouth of the solvent bottle (500).

6. The automatic solvent bottle changing device for pretreatment of physicochemical samples according to claim 5, characterized in that, The sampling needle assembly (150) also includes a bottle mouth plug (156) fitted around the lower outer periphery of the bottle mouth cap (154). Multiple pipeline interfaces (155) connected to the same multi-port valve seat (152) pass through the bottle mouth plug (156). The bottle mouth plug (156) is used to insert into the bottle mouth of the solvent bottle (500).

7. The automatic solvent bottle changing device for pretreatment of physicochemical samples according to claim 6, characterized in that, The bottle stopper (156) is equipped with a magnet (157), and the bottle cap (154) is equipped with an iron block (158). The bottle stopper (156) and the bottle cap (154) are magnetically connected.

8. The automatic solvent bottle changing device for pretreatment of physicochemical samples according to claim 1, characterized in that, It also includes a host computer, the solvent supply device (100) is equipped with a first controller, the conveyor (200) is equipped with a second controller, the liquid level sensor (143) is communicatively connected to the host computer, and the host computer is communicatively connected to the first controller and the second controller.

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