I-type automatic liquid sampling equipment

Abstract

The invention belongs to the technical field of sampling equipment, and particularly relates to I-type automatic liquid sampling equipment which comprises a support and a measuring cylinder assembly, a sampling assembly, a water inlet-stirring-drainage assembly and a control assembly which are arranged on the support. And finally, cleaning the inner wall of the cylinder and a pipeline. When the equipment provided by the invention is used for sampling, the sampling quality and stability can be improved, meanwhile, operators are reduced, and the efficiency and precision are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of sampling equipment, and in particular relates to a type I automatic liquid sampling equipment. Background Art

[0002] At present, the detection of various material components and mechanical compositions involves dissolution, sampling and other operations, such as the determination of soil mechanical composition. Small batch sampling is generally done manually, but for large batch sampling, if it is still done manually, there are problems such as inaccurate sampling position and different sampling amounts. In addition, during the mixing process, the uniformity is poor, and a large amount of manpower is required, and the whole process is inefficient and has poor accuracy. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides a type I automated liquid sampling device.

[0004] The present invention is implemented in this way. It provides a type I automatic liquid sampling device, including a bracket and a measuring cylinder assembly, a sampling assembly and a control assembly arranged on the bracket. The measuring cylinder assembly includes a plurality of measuring cylinder units arranged closely in the transverse direction, and each measuring cylinder unit includes a plurality of measuring cylinders; the sampling assembly includes a transverse moving unit, a sampling unit arranged on the transverse moving unit and a sample box assembly arranged on the bracket. The sampling unit includes a sampling control box, a pipette lifting control unit, a pipette and a liquid discharge unit. The sampling control box is arranged on the transverse moving unit on one side of the measuring cylinder assembly, and includes a front box and a rear box connected to each other. A syringe assembly with the same number of measuring cylinders in each measuring cylinder unit is connected to the outside of the front box through a bracket. Each syringe assembly includes a syringe. A syringe plug is installed at the upper end opening of the syringe. The plug is provided with a syringe air joint and a syringe liquid joint, and a pumping pump, a two-position five-way valve, and a two-position two-way valve group are provided in the cavity where the front box and the rear box are connected. The two-position two-way valve group is provided with an inlet and an outlet that is consistent with the number of measuring cylinders in each measuring cylinder unit, and a pressure relief valve that is consistent with the number of measuring cylinders in each measuring cylinder unit is provided on the outer wall of the sampling control box; a pipette lifting control unit is provided above the sampling control box, and the upper end of the pipette lifting control unit is connected to a pipette that is consistent with the number of measuring cylinders in each measuring cylinder unit; a liquid discharge unit is provided on the lateral moving unit on the other side of the measuring cylinder assembly, and includes a connecting frame, a liquid discharge electric push rod longitudinally and horizontally connected to the connecting frame, and a liquid discharge frame connected to the other end of the liquid discharge electric push rod, and a liquid discharge frame is provided with a liquid discharge pipe that is consistent with the number of measuring cylinders in each measuring cylinder unit; The air inlet connector of the whipping pump is connected to the A connector of the two-position five-way valve, the air outlet connector of the whipping pump is connected to the B connector of the two-position five-way valve, the P connector of the two-position five-way valve is connected to the inlet of the two-position two-way valve group, each outlet of the two-position two-way valve group is respectively connected to the first interface of a three-way valve, the second interface of the three-way valve is connected to a pressure relief valve, the third interface of the three-way valve is connected to the syringe air connector, the syringe liquid connector is connected to a suction pipe through a second one-way valve, a suction pipe sensor is provided on the pipeline connecting the syringe liquid connector and the suction pipe and above the second one-way valve, and the lower end opening of the syringe is connected to a discharge pipe through the first one-way valve; The sample box assembly is provided with at least two groups, each group of sample box assemblies includes a plurality of sample box units arranged closely in a transverse direction, each sample box unit includes sample boxes having the same number as the measuring cylinders in each measuring cylinder unit, the distribution form of the sample boxes is the same as the distribution form of the drainage tubes on the drainage rack, and the sample box assembly is arranged at the rear side of the measuring cylinder assembly; The lateral moving unit, the suction tube lifting control unit, the pumping pump, the two-position five-way valve, the two-position two-way valve group, the pressure relief valve, the liquid discharge electric push rod, and the suction tube sensor are all connected to the control component signal.

[0005] Preferably, the transverse movement unit includes two transverse slide rails, a main drive rod assembly, a slave drive rod assembly and a drive motor assembly respectively arranged on the front and rear sides of the bracket, a transverse slider is matched on the transverse slide rail, and both ends of the main drive rod assembly are rotatably connected to the bracket at the same end of the two transverse slide rails. The main drive rod assembly includes a main drive rod, and the main drive rod is fixedly provided with a main drive pulley at a position above the two transverse slide rails. A motor pulley is also fixedly provided on the main drive rod. The drive motor assembly is connected to the motor pulley through a motor synchronous belt, and both ends of the slave drive rod assembly are respectively rotatably connected The slave drive rod assembly is connected to the bracket at the other end of the two transverse slide rails, including a slave drive rod. The slave drive rod is fixedly provided with a slave drive pulley at a position above the two transverse slide rails. The two ends of the transverse synchronous belt are fixedly clamped on the upper surface of the transverse slider through a synchronous belt pressure plate. An inverted concave transverse connecting plate is fixedly provided on the synchronous belt pressure plate to form a hole for the transverse synchronous belt to pass through. A transverse synchronous belt is sleeved between the main drive pulley and the slave drive pulley on the same side. The sampling control box is fixedly provided on the upper surface of one transverse connecting plate, and the connecting frame is fixedly provided on the upper surface of the other transverse connecting plate.

[0006] Further preferably, the pipette lifting control unit includes a lifting electric push rod and a pipette bracket, the lower end of the lifting electric push rod is fixed on the sampling control box, and the upper end is connected to the pipette bracket, and the upper end of the pipette is connected to the pipette bracket.

[0007] Further preferably, a lifting sensor assembly is provided on the lifting electric push rod, the lifting sensor assembly includes a plurality of lifting sensors that sense metal and a lifting sensor sensing plate, the plurality of lifting sensors are fixed to different heights of the lifting electric push rod through a lifting sensor clamping plate, a hole for the lifting sensor sensing plate to pass through is provided between the lifting sensor clamping plate and the lifting sensor, the upper end of the lifting sensor sensing plate is connected to the liquid pipetting bracket and passes through the holes between each lifting sensor clamping plate and the lifting sensor, a metal sensing protrusion is provided at the lower end of the lifting sensor sensing plate, and the lifting sensor is connected to the control assembly.

[0008] Further preferably, a syringe liquid level sensor is provided on the front box at the position corresponding to each syringe, and a discharge sensor is provided on each discharge tube, and both the syringe liquid level sensor and the discharge sensor are connected to the control component.

[0009] Further preferably, it also includes a water inlet-stirring-drainage component, which includes a water inlet bucket, a drainage bucket, a pump plate, and a nozzle pipe, a circulation pipe and a drainage pipe arranged inside the measuring cylinder. The pump plate is provided with a water inlet pump, a drainage pump and a two-position three-way valve, the same number as the measuring cylinder; the water inlet bucket is connected to the normally open joint of the two-position three-way valve, the drainage joint of the two-position three-way valve is connected to the water inlet joint of the water inlet pump, one end of the circulation pipe is connected to the normally closed joint of the two-position three-way valve, and the other end extends into the measuring cylinder, one end of the nozzle pipe is connected to the drainage joint of the water inlet pump, and the other end extends into the bottom of the measuring cylinder and is connected to the nozzle, one end of the drainage pipe extends into the bottom of the measuring cylinder, and the other end is connected to the water inlet joint of the drainage pump, and the water outlet joint of the drainage pump is connected to the drainage bucket; the water inlet pump, the two-position three-way valve, and the drainage pump are all connected to the control component.

[0010] Further preferably, a measuring cylinder liquid level sensor is provided in the measuring cylinder, the measuring cylinder liquid level sensor is connected to the control component, a measuring cylinder buckle is installed on the upper end of the measuring cylinder, the nozzle pipe, the circulation pipe and the drain pipe are all connected to the measuring cylinder through the holes on the measuring cylinder buckle, and the position can be adjusted; a waste discharge sensor is provided on the pipeline between the water outlet joint of the drainage pump and the drainage bucket, and the waste discharge sensor is connected to the control component.

[0011] Further preferably, a monitoring component is also provided on the bracket, and the monitoring component includes a monitoring bracket and a camera and a buzzer arranged above the monitoring bracket, and the camera and the buzzer are connected to the control component.

[0012] Further preferably, a clean water groove is provided on the bracket and on one side of the measuring cylinder assembly, and a drainage groove is provided on the same side of the sample box assembly; a sampling control box origin sensor is provided on the bracket at the origin position of the sampling control box, and an origin sensing metal plug is provided on the rear surface of the rear box, and the sampling control box origin sensor is connected to the control assembly.

[0013] Further preferably, the control component includes a controller and an operation screen, and the controller is connected to the operation screen.

[0014] Compared with the prior art, the advantages of the present invention are: A type I automated liquid sampling device is provided, in which the sampling process is unmanned, and the stirring action is replaced by machinery instead of manual labor, thereby improving the uniformity of stirring. When sampling, the liquid can be taken strictly at the specified height in the measuring cylinder to avoid inaccurate liquid volume caused by simultaneous operation of both hands when taking liquid manually. Testing can be performed at a high throughput to reduce the operating time of personnel. In summary, when the equipment provided by the present invention is used for sampling, the sampling quality and stability can be improved, while reducing the number of operators and improving efficiency and accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of the Type I automated liquid sampling device provided by the present invention; Figure 2 It is a schematic diagram of the sampling component structure; Figure 3 It is a schematic diagram of the structure of the lateral motion unit and the sampling unit; Figure 4 is a schematic diagram of the sample box assembly structure; Figure 5 It is a schematic diagram of the structure of the sampling control box and the pipette lifting control unit; Figure 6 This is an exploded view of the syringe assembly; Figure 7 It is a schematic diagram of the structure of the front box and syringe assembly; Figure 8 This is a schematic diagram of the internal structure of the sampling control box; Fig. 9 Schematic diagram of the structure of the liquid discharge unit; Fig.10 It is a schematic diagram of the connection of various components involved in the sampling process through pipelines; Fig.11 It is the structural diagram of the lateral motion unit; Fig.12 A schematic diagram of the structure of the main drive rod connected to the motor; Fig.13 It is a schematic diagram of the structure of the part close to the sampling control box from the driving rod; Fig.14 It is a schematic diagram of the connection structure between the two ends of the transverse synchronous belt and the slider; Fig.15 It is a structural schematic diagram of the transverse synchronous belt, the transverse connecting plate, and the synchronous belt pressure plate; Fig.16 It is a schematic diagram of the structure of the pipette lifting control unit; Fig.17It is a schematic diagram of the connection structure of the lifting sensor and the lifting sensor clamping plate; Fig.18 A schematic diagram of the rear structure of a partial structure of the Type I automated liquid sampling device provided by the present invention; Fig.19 It is a schematic diagram of the structure of the measuring cylinder assembly; Fig. 20 This is an exploded view of the measuring cylinder assembly; Fig.21 It is a schematic diagram of the structure of the pump plate with a water inlet pump on one side; Fig. 22 It is a schematic diagram of the structure of a pump plate with a water outlet pump on one side; Fig.23 It is a schematic diagram of the connection of various components involved in the water inlet, mixing and drainage processes through pipelines; Fig.24 It is a schematic diagram of the monitoring component structure; Fig.25 It is a schematic diagram of the structure of the bracket and some components on the bracket; Fig.26 Schematic diagram of the rear surface of the rear box. DETAILED DESCRIPTION

[0016] The present invention is further described and explained below in conjunction with the accompanying drawings, but does not constitute a limitation of the present invention.

[0017] refer to Figure 1-Figure 26The present embodiment provides a type I automated liquid sampling device, comprising a support 1 and a measuring cylinder assembly, a sampling assembly and a control assembly arranged on the support 1. The measuring cylinder assembly comprises six measuring cylinder units arranged closely in the transverse direction, each measuring cylinder unit comprises six measuring cylinders 2, and the six measuring cylinders 2 are divided into two rows and placed in a measuring cylinder rack; the sampling assembly comprises a transverse moving unit, a sampling unit arranged on the transverse moving unit and a sample box assembly arranged on the support 1, the sampling unit comprises a sampling control box 3, a pipette lifting control unit, a pipette 4 and a liquid discharge unit, the sampling control box 3 is arranged on the transverse moving unit on one side of the measuring cylinder assembly, and comprises a front box 5 and a rear box 11 connected to each other, six syringe assemblies 6 are connected to the outside of the front box 5 through the support, each syringe assembly 6 comprises a syringe 7, a syringe plug 8 is installed at the upper end opening of the syringe 7, and a syringe is provided on the syringe plug 8 The air joint 9 and the syringe liquid joint 10 are respectively filled with sealant to fill the gaps around the syringe plug 8 and the syringe air joint 9 and the syringe liquid joint 10. A pumping pump 12, a two-position five-way valve 13, and a two-position two-way valve group 14 are provided in the cavity where the front box 5 and the rear box 11 are connected. The two-position two-way valve group 14 is provided with an inlet and an outlet that is consistent with the number of measuring cylinders 2 in each measuring cylinder unit. Six pressure relief valves 15 are provided on the outer wall of the sampling control box 3; the pipette lifting control unit is arranged above the sampling control box 3, and the upper end of the pipette lifting control unit is connected to six pipettes 4; the discharge unit is arranged on the lateral moving unit on the other side of the measuring cylinder assembly, including a connecting frame 16, a discharge electric push rod 17 longitudinally and horizontally connected to the connecting frame 16, and a discharge frame 18 connected to the other end of the discharge electric push rod 17, and six discharge pipes 19 are provided on the discharge frame 18; The air inlet connector of the whipping pump 12 is connected to the A connector of the two-position five-way valve 13, the air outlet connector of the whipping pump 12 is connected to the B connector of the two-position five-way valve 13, the P connector of the two-position five-way valve 13 is connected to the inlet of the two-position two-way valve group 14, each outlet of the two-position two-way valve group 14 is respectively connected to a first interface of a three-way valve 20, the second interface of the three-way valve 20 is connected to a pressure relief valve 15, the third interface of the three-way valve 20 is connected to the syringe air connector 9, the syringe liquid connector 10 is connected to a suction pipe 4 through a second one-way valve 66, a suction pipe sensor 67 is provided on the pipeline connecting the syringe liquid connector 10 and the suction pipe 4 and above the second one-way valve 66, and the lower end opening of the syringe 7 is connected to a discharge pipe 19 through the first one-way valve 43; The sample box assembly is provided with two groups, and the sample box assembly includes six sample box units arranged closely in the transverse direction, and each sample box unit includes six sample boxes 21, and the distribution form of the sample boxes 21 is the same as the distribution form of the drainage tubes 19 on the drainage rack 18. The sample box assembly is arranged at the rear side of the measuring cylinder assembly. On the bracket 1, the areas for arranging the measuring cylinder assembly and the sample box assembly are respectively formed by right-angle blocks and straight-line blocks to prevent the measuring cylinder assembly and the sample box assembly from moving; The lateral moving unit, the pipette lifting control unit, the pump 12, the two-position five-way valve 13, the two-position two-way valve group 14, the pressure relief valve 15, the liquid discharge electric push rod 17, and the pipette sensor 67 are all connected to the control component signal. Figure 1 For example, one side of the sampling control box 3 is set as the front. Each pipeline in the sampling unit is received by the motion protection tube 62.

[0018] The working process of this equipment includes the following steps: 1) Pour the sample liquid into the measuring cylinder 2, and select the measuring cylinder 2 for placing the sample liquid and the relevant experimental operating conditions through the control component; 2) After the sample liquid is stationary, the pipette lifting control unit controls the pipette 4 to rise until the lower end surface of the pipette 4 is higher than the upper end of the measuring cylinder 2; 3) The horizontal moving unit starts, driving the sampling control box 3 to the working origin; 4) The lateral moving unit drives the sampling control box 3 to move to the position corresponding to the measuring cylinder 2, and at this time, the six pipettes 4 are located directly above the six measuring cylinders 2; 5) The pipette lifting control unit controls the six pipettes 4 to descend until the lower ends of the pipettes 4 reach the sampling height in the measuring cylinder 2; 6) When the two-position five-way valve A and P are connected, in the sampling pipeline, the pumping pump 12, the two-position five-way valve 13, the two-position two-way valve group 14, the three-way valve 20, the pressure relief valve 15, the syringe gas joint 9 and the syringe 7 are connected through pipes to form a pipeline I; the measuring cylinder 2, the pipette 4, the second one-way valve 66, the syringe liquid joint 10 and the syringe 7 are connected through pipes to form a pipeline II; when the two-position five-way valve B and P are connected, in the sampling pipeline, the pumping pump 12, the two-position five-way valve 13, the two-position two-way valve group 14, the three-way valve 20, the syringe gas joint 9 and the syringe 7 form a pipeline III. When the two-position five-way valve A and P are connected, the pipeline I is connected to the suction joint of the pumping pump 12. When the pumping pump 12 is started, the pressure relief valve 15 is closed, the two-position two-way valve group 14 is opened, the pumping pump 12 generates suction, and negative pressure is generated in the pipeline I, and the syringe 7 is also under negative pressure; the pipette 4 is connected to the syringe 7 in the pipeline II, and the pipeline II is also under negative pressure; the pipette 4 is inserted into the sample liquid, and since the syringe 7 is under negative pressure, the sample liquid enters the syringe 7 along the pipeline II. When the sample liquid level in the syringe 7 reaches the target height, the control component controls the valve of the two-position two-way valve group 14 to close, and the pressure relief valve 15 works at the same time to unload the pressure in the syringe 7 and ensure the accuracy of the liquid volume taken in the syringe 7. When the sample liquid is taken from the six syringes 7, that is, when the six pressure relief valves are all working, the pumping pump 12 is closed. After the pumping pump 12 stops working, the pipette lifting control unit controls the pipette 4 to rise and leave the sample liquid surface. The above-mentioned liquid suction work is completed again, the purpose is to suck the liquid in pipeline II into syringe 7. When there is liquid in the pipeline, the pipette sensor 67 arranged on the second one-way valve 66 works, and when there is no liquid in the pipeline, the pipette sensor 67 stops working, closes the valve of the two-position two-way valve group 14 of this road, and when the two-position two-way valve group 14 is completely closed, the pumping pump 12 stops. When the two-position five-way valve B and P are connected, and pipeline III is connected to the air outlet joint of the pumping pump 12, the pumping pump 12 works, the two-position two-way valve group 14 opens, the pumping pump 12 generates thrust, and positive pressure is generated in pipeline III, and positive pressure is also generated in syringe 7. When the pressure is greater than the opening pressure of the spring-type first one-way valve 43, the sample liquid passes through the liquid pipe II68, the first one-way valve 43 and the liquid pipe III69, and is discharged from the liquid discharge pipe 19 and enters the sample box 21. When there is no liquid in the liquid pipe III69, the valve of the two-position two-way valve group 14 of this road is closed. When the sample liquid in the syringe 7 is discharged into the sample box 21, the pumping pump 12 is closed to complete the sampling; the second one-way valve 66 and the first one-way valve 43 are both spring-loaded one-way valves, which need to reach a certain pressure before they can be opened. The first one-way valve 43 can ensure that when the syringe 7 is under negative pressure, the gas will not be sucked in from the bottom of the syringe. The second one-way valve 66 can ensure that when the syringe 7 is under positive pressure, the gas will not be discharged from the pipette 4, and the gas can only push the liquid to be discharged.Since the gravity of the liquid in the syringe 7 is less than the opening pressure of the first one-way valve 43, and the connecting tube between the lower end of the syringe 7 and the discharge tube 19 is located at one end of the syringe 7 and is U-shaped, with the highest end higher than the upper end surface of the syringe 7, the liquid in the syringe 7 can be effectively prevented from flowing out due to gravity. 7) When it is necessary to sample the same sample twice, repeat steps 3) to 6) to sample all sample liquids for the second time. Before the second sampling, the liquid discharge electric push rod 17 is started to extend the liquid discharge pipe 19 above the second group of sample boxes 21 to discharge liquid into the second group of sample boxes 21; 8) Clean the measuring cylinder and related pipelines.

[0019] As a specific implementation method of the lateral movement unit, the lateral movement unit includes two lateral slide rails 22, a main drive rod assembly, a slave drive rod assembly and a drive motor assembly 27, which are respectively arranged on the front and rear sides of the bracket 1. A lateral slider 23 is matched on the lateral slide rail 22. The two ends of the main drive rod assembly are respectively rotatably connected to the bracket 1 at the same end of the two lateral slide rails 22. The main drive rod assembly includes a main drive rod 24. The main drive rod 24 is located above the two lateral slide rails 22 and is fixed with a main drive pulley 25. A motor pulley 26 is also fixed on the main drive rod 24. The drive motor assembly 27 is connected to the motor pulley 26 through a motor synchronous belt 28. The two ends of the slave drive rod assembly are respectively The bracket 1 is rotatably connected to the other end of the two transverse slide rails 22, and the slave drive rod assembly includes a slave drive rod 29. The slave drive rod 29 is fixedly provided with a slave drive pulley 30 at a position above the two transverse slide rails 22. The two ends of the transverse synchronous belt 31 are fixedly clamped on the upper surface of the transverse slider 23 through a synchronous belt pressure plate 64. An inverted concave transverse connecting plate 65 is fixedly provided on the synchronous belt pressure plate 64 to form a hole for the transverse synchronous belt 31 to pass through. A transverse synchronous belt 31 is sleeved between the main drive pulley 25 and the slave drive pulley 30 on the same side. The sampling control box 3 is fixedly provided on the upper surface of a transverse connecting plate 65, and the connecting frame 16 is fixedly provided on the upper surface of another transverse connecting plate 65.

[0020] When the lateral moving unit controls the lateral movement of the sampling control box 3, the driving motor assembly 27 drives the main driving rod 24 to rotate through the motor synchronous belt 28 and the motor pulley 26. The main driving rod 24 drives the two lateral sliders 23 to move along the two lateral slide rails 22 through two lateral synchronous belts 31, thereby driving the sampling control box 3 and the discharge unit to move lateral.

[0021] As a specific implementation of the pipette lifting control unit, the pipette lifting control unit includes a lifting electric push rod 32 and a pipette bracket 33. The lower end of the lifting electric push rod 32 is fixed to the sampling control box 3, and the upper end is connected to the pipette bracket 33, and the upper end of the pipette 4 is connected to the pipette bracket 33. When lifting is required, the height of the pipette bracket 33 is controlled by lifting the lifting electric push rod 32, thereby controlling the height of the pipette 4.

[0022] In order to realize automatic control of the height of the pipette 4, a lifting sensor assembly is provided on the lifting electric push rod 32, and the lifting sensor assembly includes three lifting sensors 45 for sensing metal and a lifting sensor sensing plate 46. The three lifting sensors 45 are fixed to different heights of the lifting electric push rod 32 through a lifting sensor clamping plate 47. A hole for the lifting sensor sensing plate 46 to pass through is provided between the lifting sensor clamping plate 47 and the lifting sensor 45. The upper end of the lifting sensor sensing plate 46 is connected to the pipette bracket 33 and passes through the holes between each lifting sensor clamping plate 47 and the lifting sensor 45. A metal sensing protrusion 48 is provided at the lower end of the lifting sensor sensing plate 46, and the lifting sensor 45 is connected to the control assembly.

[0023] When the lifting electric push rod 32 drives the pipette 4 to rise, it also drives the lifting sensor sensing plate 46 to rise. The metal sensing protrusion 48 senses the lifting sensor 45 at different positions. After receiving the signal through the control component, the lifting electric push rod 32 is controlled to stop at the target height.

[0024] In order to realize automatic control of the liquid level in the syringe 7 and the action after the discharge is completed, as an improvement of the technical solution, a syringe liquid level sensor 49 is provided on the front box 5 at the corresponding position of each syringe 7, and a discharge sensor 44 is provided on each discharge tube 19, and both the syringe liquid level sensor 49 and the discharge sensor 44 are connected to the control component.

[0025] In order to dissolve the diluted sample liquid, and to discharge waste and clean the pipeline, as an improvement of the technical solution, a water inlet-stirring-drainage assembly is also included, which includes a water inlet bucket 34, a drainage bucket 35, a pump plate 36, and a nozzle pipe 37, a circulation pipe 38 and a drainage pipe 39 arranged inside the measuring cylinder 2. The pump plate 36 is provided with a water inlet pump 40, a drainage pump 41 and a two-position three-way valve 42, which are the same in number as the measuring cylinder 2; the water inlet bucket 34 is connected to the normally open joint of the two-position three-way valve 42, and the two-position three-way valve 42 is connected to the normally open joint of the two-position three-way valve 42. The drainage joint is connected to the water inlet joint of the water inlet pump 40, one end of the circulation pipe 38 is connected to the normally closed joint of the two-position three-way valve 42, and the other end extends into the measuring cylinder 2, one end of the nozzle pipe 37 is connected to the drainage joint of the water inlet pump 40, and the other end extends into the bottom of the measuring cylinder 2 and is connected to the nozzle 63, one end of the drainage pipe 39 extends into the bottom of the measuring cylinder 2, and the other end is connected to the water inlet joint of the drainage pump 41, and the water outlet joint of the drainage pump 41 is connected to the drainage bucket 35; the water inlet pump 40, the two-position three-way valve 42, and the drainage pump 41 are all connected to the control component.

[0026] After adding the sample liquid to the vector cylinder 2, first add pure water to the vector cylinder 2, then stir, then take samples, discharge waste after sampling, and wash after discharge. Since the sampling process has been explained clearly, the process of adding pure water, stirring, discharging waste, and washing after discharge is explained here. Adding pure water and stirring include the following steps: a) The water inlet pump 40 is started, and the purified water is injected from the water inlet barrel 34 into the measuring cylinder 2 through the normally open joint of the two-position three-way valve 42, the water inlet pump 40, the nozzle pipe 37, the nozzle 63, and finally into the measuring cylinder 2. When the water level in the measuring cylinder 2 reaches the target height, the two-position three-way valve 42 works, switches the internal pipeline, and the water inlet function stops; b) At this time, the measuring cylinder 2, the circulation pipe 38, the two-position three-way valve 42, the water inlet pump 40, the nozzle pipe 37, and the nozzle 63 form a circulation pipeline. Since the water inlet pump 40 is still in operation, the liquid in the measuring cylinder 2 is sucked into the circulation pipe through the circulation pipe 38, and the liquid passes through the circulation pipe 38, the two-position three-way valve 42, the water inlet pump 40, the nozzle pipe 37, and finally sprayed out from the nozzle 63 and returned to the measuring cylinder 2. The water jet sprayed out by the nozzle 63 rolls up the precipitated sample liquid at the bottom of the measuring cylinder 2, and the circulation pipe 38 on the upper part of the measuring cylinder 2 has suction force, which absorbs the sample liquid. Through the cooperation of the bottom and the upper part, the sample liquid is rolled up, and the sample liquid is upward, so as to achieve stirring. When the stirring is finished, the water inlet pump 40 and the two-position three-way valve 42 are closed.

[0027] The waste discharge and post-waste cleaning process includes the following steps: 1) The drainage pump 41 is turned on to drain the sample liquid in the measuring cylinder 2 into the drainage bucket 35, and the drainage pump 41 is turned off after the drainage is completed; b) Repeat steps a) and b); 3) Start the water inlet pump 40, the drainage pump 41 and the two-position three-way valve 42 at the same time. After the cleaning is completed, close the water inlet pump 40, the drainage pump 41 and the two-position three-way valve 42 at the same time; repeat the cleaning process according to regulations.

[0028] In order to sense the liquid level in the measuring cylinder 2 and to reasonably install the various tubes in the measuring cylinder 2, as an improvement of the technical solution, a measuring cylinder level sensor 57 is provided in the measuring cylinder 2, and the measuring cylinder level sensor 57 is connected to the control component. A measuring cylinder buckle 58 is installed on the upper end of the measuring cylinder 2, and the nozzle pipe 37, the circulation pipe 38 and the drain pipe 39 are all connected to the measuring cylinder 2 through the holes on the measuring cylinder buckle 58, and the position can be adjusted. In order to sense the waste discharge process, a waste discharge sensor 61 is provided on the pipeline between the water outlet joint of the drainage pump 41 and the drainage bucket 35, and the waste discharge sensor 61 is connected to the control component.

[0029] In order to monitor the entire working process, a monitoring component is further provided on the bracket 1, preferably four groups are provided, each group of monitoring components includes a monitoring bracket 50 and a camera 51 and a buzzer 52 arranged above the monitoring bracket 50, and the camera 51 and the buzzer 52 are connected to the control component.

[0030] The device is monitored by connecting the camera 51 via WiFi. When the device is running, if the device operation is inconsistent with the regulations, for example, a sensor should work but does not work for a long time, the buzzer 52 will alarm.

[0031] Preferably, in order to clean the sample liquid in the pipeline and to clean the liquid collection pipeline separately, a clean water tank 53 is provided on the bracket 1 and on one side of the measuring cylinder assembly, and a drainage tank 54 is provided on the same side of the sample box assembly; After the first sampling, some sample liquid remains on the pipe wall. The lateral moving unit drives the sampling control box 3 to the working origin and then moves to the position of the clean water tank 53. Step 5) to step 6) are performed to determine the number of repetitions according to the experimental requirements.

[0032] When the liquid extraction pipeline needs to be cleaned separately: ① The lifting electric push rod 32 rises and reaches the high lifting sensor 45, the lifting sensor 45 works, and the lifting electric push rod 32 stops. At this time, the lower end of the pipette 4 is higher than the upper end of the measuring cylinder 2; ② The driving motor assembly 27 is started, and the horizontal slider 23 moves to the origin position, and then moves to the clean water tank 53 position; ③ When the lifting electric push rod 32 descends and reaches the middle lifting sensor 45, the lifting sensor 45 works and the lifting electric push rod 32 stops. At this time, the liquid suction tube 4 is located in the clean water tank 53; ④Repeat step 6) to complete the cleaning of the liquid extraction pipeline.

[0033] In order to identify that the sampling control box 3 has returned to the origin, as an improvement, a sampling control box origin sensor 55 is provided on the bracket 1 at the origin position of the sampling control box 3, and an origin sensing metal plug 56 is provided on the rear surface of the rear box 11, and the sampling control box origin sensor 55 is connected to the control component.

[0034] Preferably, the control assembly includes a controller 59 and an operation screen 60 , and the controller is connected to the operation screen 60 . Each automation component is connected to the controller 59 .

Claims

1. A type I automated liquid sampling device, characterized in that: The invention comprises a support (1) and a measuring cylinder assembly, a sampling assembly and a control assembly arranged on the support (1). The measuring cylinder assembly comprises a plurality of measuring cylinder units arranged closely in the transverse direction, and each measuring cylinder unit comprises a plurality of measuring cylinders (2); the sampling assembly comprises a transverse moving unit, a sampling unit arranged on the transverse moving unit and a sample box assembly arranged on the support (1); the sampling unit comprises a sampling control box (3), a pipette lifting control unit, a pipette (4) and a liquid discharge unit; the sampling control box (3) is arranged on the transverse moving unit on one side of the measuring cylinder assembly and comprises a front box (5) and a rear box (11) which are connected to each other; a syringe assembly (6) having the same number of measuring cylinders (2) in each measuring cylinder unit is connected to the outside of the front box (5) through a support; each syringe assembly (6) comprises a syringe (7); a syringe plug (8) is installed on the upper end opening of the syringe (7); a syringe air joint (9) and a syringe liquid joint (10) are provided on the syringe plug (8); the front box (5) A pumping pump (12), a two-position five-way valve (13), and a two-position two-way valve group (14) are provided in the cavity docked with the rear box (11). The two-position two-way valve group (14) is provided with an inlet and an outlet that is consistent with the number of measuring cylinders (2) in each measuring cylinder unit. A pressure relief valve (15) that is consistent with the number of measuring cylinders (2) in each measuring cylinder unit is provided on the outer wall of the sampling control box (3). A pipette lifting control unit is provided above the sampling control box (3). The upper end of the pipette lifting control unit is connected to pipettes (4) that are consistent with the number of measuring cylinders (2) in each measuring cylinder unit. A liquid discharge unit is provided on the lateral moving unit on the other side of the measuring cylinder assembly, comprising a connecting frame (16), a liquid discharge electric push rod (17) connected longitudinally and horizontally to the connecting frame (16), and a liquid discharge frame (18) connected to the other end of the liquid discharge electric push rod (17). Liquid discharge frames (18) are provided with liquid discharge pipes (19) that are consistent with the number of measuring cylinders (2) in each measuring cylinder unit. The air inlet connector of the pumping pump (12) is connected to the A connector of the two-position five-way valve (13), the air outlet connector of the pumping pump (12) is connected to the B connector of the two-position five-way valve (13), the P connector of the two-position five-way valve (13) is connected to the inlet of the two-position two-way valve group (14), each outlet of the two-position two-way valve group (14) is respectively connected to the first interface of a three-way valve (20), the second interface of the three-way valve (20) is connected to a pressure relief valve (15), the third interface of the three-way valve (20) is connected to the syringe air connector (9), the syringe liquid connector (10) is connected to a suction pipe (4) through a second one-way valve (66), a suction pipe sensor (67) is provided on the pipeline connecting the syringe liquid connector (10) and the suction pipe (4) and above the second one-way valve (66), and the lower end opening of the syringe (7) is connected to a discharge pipe (19) through the first one-way valve (43); At least two groups of sample box assemblies are provided, each group of sample box assemblies includes a plurality of sample box units arranged closely in a transverse direction, each sample box unit includes sample boxes (21) whose number is the same as the number of measuring cylinders (2) in each measuring cylinder unit, the distribution form of the sample boxes (21) is the same as the distribution form of the drainage tubes (19) on the drainage rack (18), and the sample box assembly is arranged at the rear side of the measuring cylinder assembly; The lateral movement unit, the suction tube lifting control unit, the pumping pump (12), the two-position five-way valve (13), the two-position two-way valve group (14), the pressure relief valve (15), the liquid discharge electric push rod (17), and the suction tube sensor (67) are all connected to the control component signal.

2. The type I automated liquid sampling device according to claim 1, characterized in that: The transverse moving unit comprises two transverse slide rails (22) arranged on the front and rear sides of the bracket (1), a main drive rod assembly, a slave drive rod assembly and a drive motor assembly (27). A transverse slider (23) is matched on the transverse slide rail (22). The two ends of the main drive rod assembly are respectively rotatably connected to the bracket (1) at the same end of the two transverse slide rails (22). The main drive rod assembly comprises a main drive rod (24). The main drive rod (24) is located above the two transverse slide rails (22) and is fixed with a main drive pulley (25). A motor pulley (26) is also fixed on the main drive rod (24). The drive motor assembly (27) is connected to the motor pulley (26) through a motor synchronous belt (28). The two ends of the slave drive rod assembly are respectively rotatably connected to the two transverse slide rails. (22) is located on the bracket (1), the slave drive rod assembly includes a slave drive rod (29), the slave drive rod (29) is located above the two transverse slide rails (22) and is fixed with a slave drive pulley (30), both ends of the transverse synchronous belt (31) are fixedly clamped on the upper surface of the transverse slider (23) through a synchronous belt pressure plate (64), a concave transverse connecting plate (65) is fixedly set on the synchronous belt pressure plate (64) to form a hole for the transverse synchronous belt (31) to pass through, a transverse synchronous belt (31) is sleeved between the main drive pulley (25) and the slave drive pulley (30) on the same side, the sampling control box (3) is fixedly set on the upper surface of one transverse connecting plate (65), and the connecting frame (16) is fixedly set on the upper surface of the other transverse connecting plate (65).

3. The type I automated liquid sampling device according to claim 1, characterized in that: The pipette lifting control unit comprises a lifting electric push rod (32) and a pipette support (33). The lower end of the lifting electric push rod (32) is fixed to the sampling control box (3), and the upper end is connected to the pipette support (33). The upper end of the pipette (4) is connected to the pipette support (33).

4. The type I automated liquid sampling device according to claim 3, characterized in that: A lifting sensor assembly is provided on the lifting electric push rod (32), and the lifting sensor assembly includes a plurality of lifting sensors (45) that sense metal and a lifting sensor sensing plate (46). The plurality of lifting sensors (45) are fixed to different heights of the lifting electric push rod (32) through a lifting sensor clamping plate (47). A hole for the lifting sensor sensing plate (46) to pass through is provided between the lifting sensor clamping plate (47) and the lifting sensor (45). The upper end of the lifting sensor sensing plate (46) is connected to the liquid suction bracket (33) and passes through the hole between each lifting sensor clamping plate (47) and the lifting sensor (45). The lower end of the lifting sensor sensing plate (46) is provided with a metal sensing protrusion (48). The lifting sensor (45) is connected to the control assembly.

5. The type I automated liquid sampling device according to claim 1, characterized in that: A syringe liquid level sensor (49) is provided on the front box (5) at a position corresponding to each syringe (7), and a discharge sensor (44) is provided on each discharge pipe (19). Both the syringe liquid level sensor (49) and the discharge sensor (44) are connected to the control component.

6. The type I automated liquid sampling device according to claim 1, characterized in that: The invention also includes a water inlet-stirring-drainage assembly, which includes a water inlet bucket (34), a drainage bucket (35), a pump plate (36), and a nozzle pipe (37), a circulation pipe (38), and a drainage pipe (39) arranged inside the measuring cylinder (2). The pump plate (36) is provided with a water inlet pump (40), a drainage pump (41), and a two-position three-way valve (42) the same number as the measuring cylinder (2); the water inlet bucket (34) is connected to the normally open joint of the two-position three-way valve (42), and the drainage joint of the two-position three-way valve (42) is connected to the water inlet of the water inlet pump (40). The circulation pipe (38) has one end connected to the normally closed joint of the two-position three-way valve (42), and the other end extends into the measuring cylinder (2). The nozzle pipe (37) has one end connected to the drainage joint of the water inlet pump (40), and the other end extends into the bottom of the measuring cylinder (2) and is connected to the nozzle (63). The drainage pipe (39) has one end extended into the bottom of the measuring cylinder (2), and the other end connected to the water inlet joint of the drainage pump (41). The water outlet joint of the drainage pump (41) is connected to the drainage bucket (35). The water inlet pump (40), the two-position three-way valve (42), and the drainage pump (41) are all connected to the control component.

7. The type I automated liquid sampling device according to claim 6, characterized in that: A measuring cylinder liquid level sensor (57) is provided in the measuring cylinder (2), and the measuring cylinder liquid level sensor (57) is connected to the control assembly. A measuring cylinder buckle (58) is installed on the upper end of the measuring cylinder (2). The nozzle pipe (37), the circulation pipe (38) and the drainage pipe (39) are all connected to the measuring cylinder (2) through the hole on the measuring cylinder buckle (58) in an adjustable position. A waste discharge sensor (61) is provided on the pipeline between the water outlet joint of the drainage pump (41) and the drainage bucket (35), and the waste discharge sensor (61) is connected to the control assembly.

8. The type I automated liquid sampling device according to claim 1, characterized in that: A monitoring component is also provided on the support (1), comprising a monitoring support (50) and a camera (51) and a buzzer (52) arranged above the monitoring support (50), wherein the camera (51) and the buzzer (52) are connected to the control component.

9. The type I automated liquid sampling device according to claim 1, characterized in that: A clean water tank (53) is provided on one side of the measuring cylinder assembly on the bracket (1), and a drainage tank (54) is provided on the same side of the sample box assembly; a sampling control box origin sensor (55) is provided on the bracket (1) at the origin position of the sampling control box (3), and an origin sensing metal plug (56) is provided on the rear surface of the rear box (11); the sampling control box origin sensor (55) is connected to the control assembly.

10. The type I automated liquid sampling device according to claim 1, characterized in that: The control assembly includes a controller (59) and an operating screen (60), and the controller is connected to the operating screen (60).

Images