A fully automatic stratified liquid extraction device

Abstract

The present invention belongs to the field of liquid extraction technology, and specifically discloses a fully automatic stratified liquid extraction device, including a base, a driving unit, four connecting plates, two first liquid extraction conduits, a second liquid extraction conduit and a PLC controller. An inner box is fixedly connected to the base, the top ends of the two first liquid extraction conduits are connected to a first connecting pipe, the top end of the second liquid extraction conduit is connected to a second connecting pipe, the first connecting pipe and the second connecting pipe are respectively connected to a liquid extraction pump, the bottom ends of the first liquid extraction conduit and the second liquid extraction conduit are respectively connected to a liquid suction unit, each liquid suction unit is lifted and lowered by a driving unit, the base is connected to a liquid level interface measuring and controlling instrument, and the liquid level interface measuring and controlling instrument is electrically connected to the PLC controller. The present invention measures the liquid level values ​​of different media after the mixed liquid is stratified by the liquid level interface measuring and controlling instrument. Compared with the traditional liquid extraction method, the high-purity solution to be extracted can be extracted at one time, thereby improving the work efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of liquid extraction, and in particular to a fully automatic stratified liquid extraction device. Background Art

[0002] At present, when separating mixed liquids of different media, a static method is usually adopted to allow the solutions of different media to be layered, and then a liquid extraction pipe is connected with a liquid extraction pump, and the liquid extraction pipe is manually lowered to the solution layer to be extracted, and the liquid extraction pump is turned on to extract the solution to be extracted.

[0003] However, when the operator is unaware of the precise liquid level interface of the stratified solutions, there are three possible positions for the placement of the extraction catheter. First, it is placed in the solution to be extracted so that the high-purity solution to be extracted can be completely extracted. Second, it is placed in the solution to be extracted but at a close distance to the adjacent solution to be extracted. Since vortices are generated when the solutions are extracted, it is likely that both solutions will be extracted, resulting in a decrease in the purity of the solution to be extracted. Third, it is placed in the solution adjacent to the solution to be extracted. Error in placement results in failure to extract the solution to be extracted.

[0004] The last two extraction methods in the above three situations will affect the purity of the solution to be extracted. Therefore, when extracting the solution to be extracted from the stratified mixed solution, if the liquid level interface of the solution to be extracted is unknown, the manual extraction method may result in the possibility that the extracted solution to be extracted is of low purity. If the extracted solution to be extracted is of low purity, repeated extraction is required, which consumes manpower and greatly reduces the efficiency of the extraction work. Summary of the invention

[0005] The purpose of the present invention is to provide a fully automatic stratified liquid extraction device to solve the problem that in the prior art, when extracting the solution to be extracted from the stratified mixed solution, the solution is manually extracted at an unknown precise liquid level interface, resulting in the extracted solution being of insufficient purity and requiring repeated extraction and purification, which wastes manpower and leads to low extraction efficiency.

[0006] To achieve the above-mentioned purpose, the basic scheme provided by the present invention is: a fully automatic stratified liquid extraction device, comprising a base, a driving unit, four connecting plates, two first liquid extraction ducts, a second liquid extraction duct and a PLC controller, the base is fixedly connected to an inner box, wherein two connecting plates located inside the inner box are movably connected to the second liquid extraction duct and the two first liquid extraction ducts, the other two connecting plates are respectively arranged near the ends of the first liquid extraction duct and the second liquid extraction duct and are fixedly connected to the first liquid extraction duct and the second liquid extraction duct, the top ends of the two first liquid extraction ducts are connected to the first connecting pipes, the top ends of the second liquid extraction ducts are connected to the second connecting pipes, the first connecting pipes and the second connecting pipes are respectively connected to liquid extraction pumps, the bottom ends of the first liquid extraction duct and the second liquid extraction duct are respectively connected to liquid suction units, each of the liquid suction units is lifted and lowered by the driving unit, the base is connected to a liquid level interface measuring and controlling instrument, and the liquid level interface measuring and controlling instrument is electrically connected to the PLC controller.

[0007] The principle and beneficial effect of the present invention are as follows: the present invention places the base of the entire device on a liquid suction pool, and a liquid level interface measuring and controlling instrument measures the liquid level values ​​of different media after the mixed liquid is layered, and transmits the values ​​to a PLC controller, and the PLC controller controls a driving unit to drive the liquid suction unit to descend, and the liquid to be sucked unit is placed in the solution to be sucked, and the connecting plate can make the first liquid suction conduit and the second liquid suction conduit maintain a vertical direction and descend to the solution to be sucked, and no tilting and shaking will occur during the descent process, and the stability is relatively high; start the liquid suction pump, and the solution to be sucked is extracted from the first liquid suction conduit and the second liquid suction conduit. Since the position of the mixed liquid in which the extracted solution to be sucked is located is clear, the extracted solution to be sucked has a very high purity, which avoids the situation where other mixed liquids are extracted due to the unknown liquid level during manual extraction, and multiple extractions and purifications are required to obtain a high-purity solution to be sucked. Compared with the traditional liquid extraction method, the present device can extract a high-purity solution to be sucked in one time, thereby improving work efficiency.

[0008] Solution 2, which is the preferred basic solution, the driving unit includes a reciprocating screw and a reduction motor, the reduction motor is located in the inner box, the base is connected to a base, the base is fixed to the bottom of the connecting plate, the reduction motor is fixed to the connecting plate, the reciprocating screw is fixed to the reduction motor, the two ends of the reciprocating screw rod respectively pass through the inner box and the base and are fixed to the connecting plate, the reduction motor is transmission-connected with an encoder, the reduction motor is electrically connected to the PLC controller, and the encoder is electrically connected to the PLC controller;

[0009] After the PLC controller receives the interface value of the solution to be pumped from the liquid level interface measuring and controlling instrument, the PLC controller controls the reduction motor to start, and the reduction motor drives the reciprocating screw to rotate. According to the encoder on the reduction motor, the reciprocating screw drives the first liquid extraction conduit, the second liquid extraction conduit and the liquid suction unit to descend into the solution to be pumped, and the extraction operation of the solution to be pumped can be carried out.

[0010] Solution 3, which is a preferred embodiment of Solution 2, further comprises a first proximity switch and a second proximity switch, wherein the first proximity switch and the second proximity switch are respectively connected to the connecting plate, the first proximity switch extends above the first connecting pipe, and the second proximity switch is located between the connecting plates in the inner box body, and the connecting plate above the inner box body and the connecting plate in the inner box body are respectively provided with contact holes, and the contact holes are electrically connected to the reduction motor;

[0011] When the liquid level of the solution to be extracted is low, the reciprocating screw drives the connecting plate and the liquid suction unit to descend. When the first proximity switch touches the corresponding contact hole on the lower connecting plate, the contact hole is triggered to turn off the reduction motor, and the connecting plate and the liquid suction unit stop descending, and no longer descend indefinitely to interfere with the equipment in the inner box.

[0012] When the liquid level of the solution to be extracted is high, the reciprocating screw will drive the liquid suction unit to perform a lifting movement. When the second proximity switch touches the corresponding contact hole on the upper connecting plate, the contact hole is triggered to turn off the reduction motor, and the connecting plate and the liquid suction unit stop rising and no longer rise indefinitely to interfere with the equipment in the inner box.

[0013] Solution 4, which is a preferred embodiment of Solution 3, the liquid suction unit comprises a disc, a ring and a liquid suction pipe, the liquid suction pipe penetrates the disc and is fixedly connected to the disc, a connecting column is connected between the disc and the ring, a conical liquid collecting pipe is connected to the bottom end of the ring, the liquid suction pipe extends into the conical liquid collecting pipe, the bottom ends of the first liquid extraction conduit and the second liquid extraction conduit are respectively threadedly connected to the liquid suction pipe, and a horizontal liquid inlet is formed between the disc and the ring;

[0014] When the traditional tubular pipette sucks liquid, a vortex will be formed, and there is a possibility that the solution of the adjacent layer will be extracted, resulting in the low purity of the extracted solution. However, with the horizontal liquid inlet in the present invention, when the liquid extraction pump is started, the solution to be extracted will be horizontally collected between the disk and the ring, and the solution to be extracted will be collected in the conical liquid collecting pipe, and then be extracted by the first extraction duct and the second extraction duct after passing through the pipette, thereby avoiding the vortex formed when the traditional extraction pipe extracts liquid, and further avoiding the absorption of solutions of other media, and being able to collect the solution to be extracted in this layer with the highest purity; at the same time, the height of the pipette unit can be adjusted by the structure of the threaded connection between the pipette and the first extraction duct and the second extraction duct.

[0015] Option 5 is a preferred option of Option 4, wherein an explosion-proof junction box is connected to the base; when extracting solution in explosion-proof areas, the explosion-proof junction box is used to protect the device, thereby improving the safety performance of the device.

[0016] Option six is ​​a preferred option of option five. Three guide cylinders are connected between the two connecting plates located in the inner box body. Each of the guide cylinders is movably mounted on the first liquid extraction conduit and the second liquid extraction conduit. Linear bearings are provided between the first liquid extraction conduit and the second liquid extraction conduit and the guide cylinders respectively. The linear bearings can reduce the degree of wear of the first liquid extraction conduit, the second liquid extraction conduit and the guide cylinders, and prevent corrosion and rust on the contact surfaces of the first liquid extraction conduit and the second liquid extraction conduit and the guide cylinders.

[0017] Option seven, which is a preferred embodiment of Option six, is that the bottom of each conical liquid collecting tube is threadedly connected with a sealing cap; after the liquid aspiration unit is used for a long time, the sealing cap can be unscrewed to drain and clean the interior of the liquid aspiration unit.

[0018] Option 8, which is a preferred embodiment of Option 7, is provided with sealing gaskets at both ends of each guide tube; the sealing gaskets are used to prevent impurities hanging on the wall from entering the gap between the guide tube and the first liquid extraction conduit and the second liquid extraction conduit, and adhering to the inner wall of the guide tube, causing the guide tube to get stuck, thereby affecting the movement of the first liquid extraction conduit and the second liquid extraction conduit in the guide tube.

[0019] Option nine is a preferred embodiment of Option eight, wherein a thermal insulation protective cover is fixedly connected to the base, the thermal insulation protective cover is located outside the inner box, and thermal insulation cotton is provided between the thermal insulation protective cover and the inner box; the entire device is insulated to ensure that the solution to be extracted maintains good fluidity for easy extraction. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a partial cross-sectional view of a fully automatic stratified liquid extraction device of the present invention;

[0021] Figure 2 yes Figure 1 The enlarged view of point A in the middle;

[0022] Figure 3 yes Figure 1 Right view of;

[0023] Figure 4 yes Figure 3 The enlarged view of point B in the middle;

[0024] Figure 5 It is a cross-sectional view of a liquid suction unit in a fully automatic stratified liquid extraction device of the present invention. Implementation

[0025] The present invention is further described in detail below through specific embodiments:

[0026] The figure marks in the drawings of the specification include: 1. base; 2. machine base; 3. reduction motor; 4. liquid suction unit; 41. disk; 42. ring; 43. connecting column; 44. conical liquid collecting pipe; 45. liquid suction pipe; 5. encoder; 6. connecting plate; 7. first liquid extraction duct; 8. second liquid extraction duct; 9. first connecting pipe; 10. second connecting pipe; 11. guide cylinder; 12. first proximity switch; 13. contact hole; 14. liquid level interface measuring and controlling instrument; 15. reciprocating screw; 16. explosion-proof junction box; 17. thermal insulation protective cover; 18. inner box; 19. signal rod; 20. cover; 21. second proximity switch.

[0027] like Figures 1 to 5 As shown: a fully automatic stratified liquid extraction device, including a base 1, a drive unit, four connecting plates 6, two first liquid extraction conduits 7, a second liquid extraction conduit 8 and a PLC controller, the base 1 is fixedly connected with an inner box 18 and a heat preservation protective cover 17, the heat preservation protective cover 17 is arranged on the outside of the inner box 18, and heat preservation cotton is arranged between the heat preservation protective cover 17 and the inner box 18. Two connecting plates 6 are arranged in the inner box 18, the base 1 is fixedly connected with an organic base 2, the base 1 is fixedly connected with an explosion-proof junction box 16 and a liquid level interface measuring and controlling instrument 14, the model of the liquid level interface measuring and controlling instrument 14 is ZGJD-T0200BA, and the liquid level interface measuring and controlling instrument 14 includes two signal rods 19 for sending and receiving electromagnetic signals, and the two signal rods 19 respectively pass through the base 1 and extend downward into the mixed liquid.

[0028] The driving unit includes a reciprocating screw 15 and a reduction motor 3. The reciprocating screw 15 is fixedly connected to the reduction motor 3. The reduction motor 3 is fixedly connected to one of the connecting plates 6 close to the base 1. The reduction motor 3 is connected to the encoder 5 through gears. The liquid level interface measuring and controlling instrument 14, the reduction motor 3, the encoder 5 and the PLC controller are electrically connected; the bottom of the connecting plate 6 is fixedly connected to the machine base 2, and the two ends of the reciprocating screw 15 movably penetrate the connecting plate 6 in the inner box body 18. The two ends of the reciprocating screw 15 respectively pass through the top of the inner box body 18 and the base 1 and are fixedly connected to the connecting plate 6 on the outside of the inner box body 18.

[0029] Two of the connecting plates 6 located inside the inner box 18 are slidably connected to the second liquid extraction conduit 8 and the two first liquid extraction conduits 7. The other two connecting plates 6 are respectively arranged near the ends of the second liquid extraction conduit 8 and the two first liquid extraction conduits 7, and are respectively fixedly connected to the two second liquid extraction conduits 8 and the first liquid extraction conduits 7. The top of each first liquid extraction conduit 7 and the top of the second liquid extraction conduit 8 are fixedly penetrated through the connecting plate 6. Each first liquid extraction conduit 7 is connected to a first connecting pipe 9, and the second liquid extraction conduit 8 is connected to a second connecting pipe 10. The first connecting pipe 9 and the second connecting pipe 10 are respectively connected to the liquid inlet of the liquid extraction pump. The first liquid extraction conduit 7 and the second liquid extraction conduit 8 between the two connecting plates 6 in the inner box 18 are respectively sleeved with three guide cylinders 11. Each guide cylinder 11 is fixedly connected between the two connecting plates 6 located in the inner box 18. Each guide cylinder 11 is movably connected to the first liquid extraction conduit 7 and the second liquid extraction conduit 8 through a linear bearing. Both ends of each guide cylinder 11 are filled with sealing gaskets, and each sealing gasket is sleeved on the first liquid extraction conduit 7 and the second liquid extraction conduit 8. The first proximity switch 12 and the second proximity switch 21 are fixedly connected to the connecting plate 6. The first proximity switch 12 passes through the connecting plate 6 and extends above the first connecting tube 9. The second proximity switch 21 is arranged between two connecting plates 6 located in the inner box 18. Contact holes 13 are respectively opened on the connecting plate 6 near the bottom of the first proximity switch 12 and the connecting plate 6 near the top of the second proximity switch 21. The contact holes 13 are electrically connected to the reduction motor 3.

[0030] The bottom ends of the two first liquid extraction ducts 7 and the bottom ends of the second liquid extraction ducts 8 are connected to the liquid suction unit 4, and each liquid suction unit 4 includes a disc 41, a ring 42 and a liquid suction tube 45. The bottom ends of the two first liquid extraction ducts 7 and the second liquid extraction ducts 8 pass through the base 1 and are threadedly connected to the liquid suction tube 45. The liquid suction tube 45 passes through the disc 41 and is fixedly connected to the disc 41. A connecting column 43 is fixedly connected between the disc 41 and the ring 42. A conical liquid collecting tube 44 is fixedly connected to the bottom end of the ring 42. The end of the liquid suction tube 45 extends into the conical liquid collecting tube 44. A horizontal liquid inlet is formed between the disc 41 and the ring 42. The bottom end of each conical liquid collecting tube 44 is threadedly connected to a cover 20. The ends of the first liquid extraction duct 7 and the second liquid extraction duct 8 close to the liquid suction unit 4 are respectively fixedly connected to the connecting plate 6 connected to the reciprocating screw 15.

[0031] The implementation method of this embodiment is as follows: when the present invention is used, the base 1 of the device is placed on the top of the mixed liquid pool. At this time, the two signal rods 19 of the liquid level interface measuring and controlling instrument 14 are placed in the layered mixed liquid. The liquid level interface measuring and controlling instrument 14 transmits the detected solution level detection values ​​of different media to the PLC controller. The PLC controller controls the reduction motor 3 to start, and the reduction motor 3 drives the reciprocating screw 15 to rotate. The reciprocating screw 15 drives the first liquid extraction conduit 7 and the second liquid extraction conduit 8 to descend, so that the liquid suction unit 4 stays in the solution to be extracted. During the rotation of the reduction motor 3, the encoder 5 continues to count. When the accumulated value of the encoder 5 just reaches the height of the liquid suction unit lifting, the PLC controller controls the reduction motor 3 to turn off and start the liquid extraction pump. The solution to be extracted is horizontally sucked in from the liquid inlet between the disk 41 and the ring 42 on the liquid suction unit 4, and the solution to be extracted can be extracted through the first liquid extraction conduit 7 and the second liquid extraction conduit 8.

[0032] When extracting a liquid, the liquid suction units 4 of the first liquid extraction tube 7 and the second liquid extraction tube 8 can be set at the same height, that is, the liquid suction unit 4 and the second liquid extraction tube 8 are threadedly connected, and the liquid suction unit 4 on the second liquid extraction tube 8 is screwed to make it at the same height as the liquid suction unit 4 connected to the first liquid extraction tube 7, and then the reduction motor 3 controls the liquid suction unit 4 to descend according to the above steps, so that the device can extract the solution to be extracted.

[0033] When extracting the stratified liquid of two media, the liquid suction unit 4 of the second liquid extraction conduit 8 is screwed so that the liquid suction unit 4 of the first liquid extraction conduit 7 and the liquid suction unit 4 of the second liquid extraction conduit 8 are located at different heights, that is, the liquid suction unit 4 and the second liquid extraction conduit 8 are threadedly connected, and the liquid suction unit 4 on the second liquid extraction conduit 8 is screwed to descend, so that the liquid suction unit 4 on the second liquid extraction conduit 8 is lower than the height of the liquid suction unit 4 connected to the first liquid extraction conduit 7, so that the liquid suction units 4 at two heights can be respectively located in the solutions to be extracted of different media, and according to the above steps, the reduction motor 3 controls the liquid suction unit 4 to descend, so that two solutions to be extracted can be extracted through the first liquid extraction conduit 7 and the second liquid extraction conduit 8 at one time;

[0034] According to the height of the stratified solution measured by the liquid level interface measuring and controlling instrument 14, the PLC controller will pre-set the liquid level interval value that can completely extract the solution to be extracted. If the solution height of the solution to be extracted is less than or equal to the liquid level interval value after extracting the solution for a period of time, the PLC controller will control the liquid extraction pump and the reduction motor 3 to stop the liquid extraction work.

[0035] When the device is used to recover coal tar, a large amount of high-temperature raw gas will be produced during the refining and processing of coal. There are some gases such as carbon monoxide, ammonia, and small droplets of primary tar in the raw gas. In order to reduce the temperature of the coke oven raw gas and eliminate the smoke of the raw gas, as well as to recover the small droplets of primary tar, circulating ammonia water is sprayed at the bridge pipe. The small droplets of primary tar are wrapped in water under the spraying to form small oil droplets. Ammonia gas dissolves in water to generate ammonia water. The medium of coal tar and ammonia water is not the same. Coal tar and ammonia water gradually stratify in the tar ammonia water pool due to sedimentation and overflow. After stratification, the device of the present invention can be used to extract the coal tar for recovery. Coal tar and ammonia water are a mixed solution, and coal tar is the solution to be extracted by this device.

[0036] During actual use, the base 1 of the device is placed on the top of the tar and ammonia water pool. At this time, the two signal rods 19 of the liquid level interface measuring and controlling instrument 14 are placed in the stratified coal tar and ammonia water. The liquid level interface measuring and controlling instrument 14 detects the liquid level detection values ​​of the coal tar and ammonia water, and transmits the liquid level detection values ​​to the PLC controller. The PLC controller controls the reduction motor 3 to start, and the reduction motor 3 drives the reciprocating screw 15 to rotate. The reciprocating screw 15 drives the first liquid extraction conduit 7 and the second liquid extraction conduit 8 to descend, so that the liquid suction unit 4 stays in the oil layer of the coal tar. During the rotation of the reduction motor 3, the encoder 5 continues to count. When the accumulated value of the encoder 5 just reaches the height of the lifting of the liquid suction unit 4, the PLC controller controls the reduction motor 3 to turn off and start the liquid extraction pump. The coal tar is horizontally sucked in from the liquid inlet between the disk 41 and the ring 42 on the liquid suction unit 4, and the coal tar can be extracted through the first liquid extraction conduit 7 and the second liquid extraction conduit 8.

[0037] Coal tar also contains two kinds of media, light oil and heavy oil. The liquid level interface measuring and controlling instrument 14 can also accurately measure the liquid level detection values ​​of the two according to the media of light oil and heavy oil. When extracting light oil and heavy oil from coal tar, the liquid suction unit 4 of the second liquid extraction conduit 8 is screwed so that the liquid suction unit 4 of the first liquid extraction conduit 7 and the liquid suction unit 4 of the second liquid extraction conduit 8 are located at different heights, so that the liquid suction units 4 at two heights can be located in the light oil and heavy oil respectively. The liquid level interface measuring and controlling instrument 14 transmits the measured liquid level values ​​of light oil and heavy oil to the PLC controller, and then operates the reduction motor 3 to control the liquid suction unit 4 to descend according to the above steps, so that the light oil and heavy oil can be extracted through the first liquid extraction conduit 7 and the second liquid extraction conduit 8.

[0038] According to the oil layer height of coal tar or light oil and heavy oil in coal tar measured by the liquid level interface measuring and controlling instrument 14, the PLC controller will pre-set the liquid level interval value that can completely extract the coal tar or the light oil and heavy oil in coal tar. If after extracting light oil and heavy oil for a period of time, the oil layer height of light oil or heavy oil is less than or equal to the preset liquid level interval value, the PLC controller will control the liquid pump and the reduction motor 3 to stop the oil pumping work.

[0039] The above is only an embodiment of the present invention, and the common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the present invention, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A fully automatic stratified liquid extraction device, It is characterized in that The invention comprises a base (1), a drive unit, four connecting plates (6), two first liquid extraction conduits (7), a second liquid extraction conduit (8) and a PLC controller, wherein the base (1) is fixedly connected to an inner box (18), wherein two connecting plates (6) located inside the inner box (18) are movably connected to the second liquid extraction conduit (8) and the two first liquid extraction conduits (7), and the other two connecting plates (6) are respectively arranged near the ends of the first liquid extraction conduit (7) and the second liquid extraction conduit (8) and are fixedly connected to the first liquid extraction conduit (7) and the second liquid extraction conduit (8), and the two connecting plates (6) are respectively arranged near the ends of the first liquid extraction conduit (7) and the second liquid extraction conduit (8) and are fixedly connected to the first liquid extraction conduit (7) and the second liquid extraction conduit (8). The top end of the first liquid extraction conduit (7) is connected to a first connecting tube (9), the top end of the second liquid extraction conduit (8) is connected to a second connecting tube (10), the first connecting tube (9) and the second connecting tube (10) are respectively connected to liquid extraction pumps, the bottom ends of the first liquid extraction conduit (7) and the second liquid extraction conduit (8) are respectively connected to liquid suction units (4), each of the liquid suction units (4) is lifted and lowered by a driving unit, the base (1) is connected to a liquid level interface measuring and controlling instrument (14), and the liquid level interface measuring and controlling instrument (14) is electrically connected to a PLC controller; The liquid suction unit (4) comprises a disc (41), a ring (42) and a liquid suction tube (45); the liquid suction tube (45) penetrates the disc (41) and is fixedly connected to the disc (41); a connecting column (43) is connected between the disc (41) and the ring (42); the bottom end of the ring (42) is connected to a conical liquid collecting tube (44); the liquid suction tube (45) extends into the conical liquid collecting tube (44); the bottom ends of the first liquid extraction conduit (7) and the second liquid extraction conduit (8) are respectively threadedly connected to the liquid suction tube (45); and a horizontal liquid inlet is formed between the disc (41) and the ring (42).

2. A fully automatic stratified liquid extraction device according to claim 1, It is characterized in that The drive unit comprises a reciprocating screw (15) and a reduction motor (3), wherein the reduction motor (3) is located in an inner box (18), the base (1) is connected to a machine base (2), the machine base (2) is fixedly connected to the bottom of a connecting plate (6), the reduction motor (3) is fixedly connected to the connecting plate (6), the reciprocating screw (15) is fixedly connected to the reduction motor (3), the two ends of the reciprocating screw (15) respectively pass through the inner box (18) and the base (1) and are fixedly connected to the connecting plate (6), the reduction motor (3) is transmission-connected to an encoder (5), the reduction motor (3) is electrically connected to a PLC controller, and the encoder (5) is electrically connected to the PLC controller.

3. A fully automatic stratified liquid extraction device according to claim 2, It is characterized in that The invention also comprises a first proximity switch (12) and a second proximity switch (21), wherein the first proximity switch (12) and the second proximity switch (21) are respectively connected to a connecting plate (6), the first proximity switch (12) extends above the first connecting tube (9), and the second proximity switch (21) is located between the connecting plates (6) in the inner box (18), and the connecting plate (6) above the inner box (18) and the connecting plate (6) inside the inner box (18) are respectively provided with a contact hole (13), and the contact hole (13) is electrically connected to the reduction motor (3).

4. A fully automatic stratified liquid extraction device according to claim 3, It is characterized in that An explosion-proof junction box (16) is connected to the base (1).

5. A fully automatic stratified liquid extraction device according to claim 4, It is characterized in that Three guide cylinders (11) are connected between the two connecting plates (6) located in the inner box body (18), and each of the guide cylinders (11) is movably sleeved on the first liquid extraction conduit (7) and the second liquid extraction conduit (8).

6. A fully automatic stratified liquid extraction device according to claim 5, It is characterized in that The bottom of each conical liquid collecting pipe (44) is threadedly connected to a sealing cap (20).

7. A fully automatic stratified liquid extraction device according to claim 6, It is characterized in that Both ends of each guide cylinder (11) are provided with sealing gaskets.

8. A fully automatic stratified liquid extraction device according to claim 7, It is characterized in that A heat-insulating protective cover (17) is fixedly connected to the base (1), the heat-insulating protective cover (17) is located outside the inner box (18), and heat-insulating cotton is provided between the heat-insulating protective cover (17) and the inner box (18).

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