A dual channel piston pump

Abstract

The utility model relates to two mode pump technical field, concretely relates to a double -channel piston pump, include: protection box, pump assembly, the pump assembly is fixed in the inner wall of protection box and is used for pumping and draining liquid, detection component, detection component is used for measuring the density of pumping and draining liquid, air intake control assembly, air intake control assembly controls the air intake through the density of detection component detection liquid, air intake control assembly includes the vertical board fixed in the inner wall of protection box and away from the position of pump assembly, the inner wall of vertical board is embedded with air intake spare, air intake spare has one air intake end and two air outlet ends. The utility model provides different pumping and draining pressure to pumping and draining liquid through the automatic measurement of the density of different liquid, so can effectively avoid the double -channel piston pump pumping and draining pressure shortage when conveying liquid, cannot pump and drain the liquid of different density.

Description

Technical Field

[0001] This utility model relates to the field of dual-mode pump technology, specifically to a dual-channel piston pump. Background Technology

[0002] Dual-channel piston pumps are high-precision and reliable pumps that provide stable flow output and precise pressure control. They are widely used in chemical, laboratory, and medical equipment fields. They are simple in design, easy to operate, and can adapt to different working conditions and fluid characteristics, making them an ideal choice for continuous and precise fluid transfer.

[0003] For example, patent publication number CN113357117A discloses a dual-channel piston pump, including a piston pump body, an oil inlet chamber and an oil outlet chamber located inside the piston pump body. A piston that can move along the oil inlet chamber and the oil outlet chamber is installed inside the piston pump body. Oil guide pipes are connected to the four corners of the piston pump body, and the oil guide pipes communicate with the oil inlet chamber and the oil outlet chamber.

[0004] In industrial production, dual-channel piston pumps may need to pump liquids of different densities. For example, in the chemical industry, various liquid solutions or suspensions of different concentrations need to be processed. Liquids of different densities will generate different resistances during the pumping process. Liquids with higher densities have greater inertia and viscosity, which leads to greater resistance when subjected to pumping force. Existing dual-channel piston pumps usually require manual adjustment of the pumping pressure to ensure that the dual-channel piston pump can pump liquids of different densities. However, manual adjustment cannot distinguish the density of the liquid being pumped, and failure to adjust the pumping pressure in time will affect the pumping efficiency. Utility Model Content

[0005] In view of the above-mentioned shortcomings of the existing technology, the present invention provides a dual-channel piston pump, which can effectively solve the problem that manual adjustment of pumping pressure in the existing technology cannot identify the density of the liquid in time, thus affecting the pumping efficiency.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] This utility model provides a dual-channel piston pump, comprising:

[0008] Protective box;

[0009] A pump assembly, which is fixed to the inner wall of the protective housing and is used to pump out liquid;

[0010] A detection component for measuring the density of the pumped liquid;

[0011] An air intake control component controls the air intake by detecting the density of the liquid using a detection component. The air intake control component includes a vertical plate fixed to the inner wall of the protective box and located away from the pump assembly. An air intake component is embedded in the inner wall of the vertical plate. The air intake component has one air inlet end and two air outlet ends. The two air outlet ends are symmetrically distributed vertically and vertically on the side of the air intake component near the pump assembly. An air valve is connected to the air inlet end. A first clamp and a second clamp are elastically provided at the connection between the two air outlet ends and the air inlet end, respectively. The air intake control component is used to alternately open and close the two air outlet ends when supplying air to the pump assembly, and automatically adjust the flow rate of the air outlet ends according to the liquid density measurement of the detection component.

[0012] Preferably, the pump assembly includes a base fixedly installed on the inner wall of the protective box, a pump body fixedly installed on the upper end face of the base, a piston slidably installed in the center of the inner wall of the pump body, the piston dividing the interior of the pump body into a first pumping zone and a second pumping zone, a stopper rod coaxially fixedly inserted in the piston, an outlet connector symmetrically connected to the first pumping zone and the second pumping zone, and two inlet connectors connecting the first pumping zone and the second pumping zone.

[0013] Preferably, the system further includes the air compression assembly, which includes two compression pipes fixedly installed at both ends of the pump body via connectors. The two ends of the piston rod pass through the pump body and extend into the compression pipes at corresponding positions, and are fixedly installed with sliding discs. An exhaust pipe is fixedly installed at the end of the sliding disc away from the pump body. An exhaust valve is fixedly installed at the end of the exhaust pipe away from the sliding disc, passing through the compression pipes. At least one air outlet is provided on the outer circumferential surface of the exhaust pipe near the sliding disc. An exhaust port is provided at the center of the outer circumferential surface of the exhaust pipe. An air inlet is connected to the outer circumferential surface of the two compression pipes at the upper position. The air inlet is connected to the two air outlets via pipes. A first spring is fixedly installed on one side of the sliding disc and one side of the inner wall of the compression pipe.

[0014] Preferably, the detection component includes an inlet pipe connected to the lower end of the inlet connector. The inlet pipe consists of a three-way pipe and short pipes symmetrically connected to both ends of the three-way pipe. The other end of the three-way pipe is connected to the measuring pipe. A plurality of second springs are arranged in a circumferential array between the fixed sleeve and the sliding sleeve. The sliding sleeve is elastically slidably mounted on the outer circumferential surface of the measuring pipe. The sliding sleeve consists of an integrally formed retaining ring and a plurality of retaining blocks arranged in a circumferential array on the inner circumferential surface of the retaining ring. The plurality of retaining blocks penetrate the measuring pipe and are jointly fixedly mounted with a blocking ring. The blocking ring is slidably connected to the inner wall of the measuring pipe. A plurality of protrusions are arranged in a linear array on the inner circumferential surface of the blocking ring. A fixed sleeve is fixedly mounted on the outer circumferential surface of the measuring pipe near the pump assembly. A plurality of linear variable differential transformers are embedded in a circumferential array inside the fixed sleeve. The linear variable differential transformers consist of a fixed coil, a movable iron core, and a central coil. The iron core is connected to a control device via a wire.

[0015] Preferably, a fourth spring is fixedly installed on the inner wall of the air intake component corresponding to the second clamping tube and the first clamping tube. Triangular linkage blocks are fixedly installed on the outer peripheral surface of the second clamping tube near the upper position of the pump body and on the outer peripheral surface of the first clamping tube near the lower position. A first groove is formed on the upper position of the side of the vertical plate near the pump body, and the first groove corresponds to the second clamping tube. A second groove is formed on the lower position of the side of the vertical plate near the pump body, and the second groove corresponds to the first clamping tube. A first sliding plate is elastically slidably installed on the inner wall of the first groove. A first triangular locking block is fixedly installed on the lower end face of the first sliding plate. A first lifting rod is fixedly installed on the side of the first sliding plate near the first clamping tube. A second sliding plate is elastically slidably installed on the inner wall of the second groove. A second triangular locking block is fixedly installed on the upper end face of the second sliding plate. A second lifting rod is fixedly installed on the side of the second triangular locking block near the second clamping tube. A lifting block that is driven to rise and fall is provided on the inner wall of the air intake component near the pump body. A C-shaped locking claw is fixedly installed on the side of the lifting block away from the pump body.

[0016] Preferably, two support plates are fixedly installed on the side of the vertical plate near the pump body, and a transmission rod is rotatably installed between the two support plates. The transmission rod consists of a double-acting screw and two round rods symmetrically fixed at both ends of the double-acting screw. The lifting block is sleeved on the double-acting screw and used in conjunction with it. Limiting strips are installed at equal intervals between the air inlet and the two support plates. A drive source is fixedly installed on the upper surface of the protective box. The output end of the drive source passes through the protective box and is fixedly connected to the transmission rod. The drive source is signal-connected to the output end of the control device.

[0017] Preferably, a third spring is fixedly installed between the upper end face of the first slider and the inner wall of the first groove, and between the lower end face of the second slider and the inner wall of the second groove.

[0018] The technical solution provided by this utility model has the following advantages compared with the known prior art:

[0019] When liquids of varying densities impact the multiple protrusions on the linear array of the inner circumference of the impeding ring, the liquids of different densities cause the impeding ring to slide to varying degrees. This causes the linear variable differential transformer to generate different electrical signals. These different electrical signals are transmitted through wires to the input of the control device. By connecting the generated electrical signals of different magnitudes to the drive source, the different electrical signals drive the drive source to rotate the transmission rod by different numbers of revolutions. The electrical signal determines the different numbers of revolutions, allowing the output of the drive source to rotate the transmission rod according to the magnitude of the electrical signal within a unit of working time. The rotation of the transmission rod... The number of moving coils directly affects the lifting block and the C-shaped jaws, thereby adjusting the lifting amplitude of the C-shaped jaws. Different lifting amplitudes allow the air inlet to supply different amounts of air to the two outlets. These different air supply amounts are connected to the compression pipe through pipelines, causing the sliding disc inside the compression pipe to slide at different amplitudes. This provides different pumping pressures for liquids of different densities. By automatically measuring the density of different liquids, different pumping pressures are provided for pumping. This effectively avoids the situation where the dual-channel piston pump cannot pump liquids of different densities due to insufficient pumping pressure during liquid transportation. Attached Figure Description

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

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0022] Figure 2 This is a schematic diagram of the internal structure of the present invention;

[0023] Figure 3 This is a cross-sectional view of the pump assembly of this utility model;

[0024] Figure 4 for Figure 3 Enlarged structural diagram at point A in the middle;

[0025] Figure 5 This is a schematic diagram of the detection component structure of this utility model;

[0026] Figure 6 This is an exploded view of the detection group of this utility model;

[0027] Figure 7 This is a schematic diagram of the intake volume control component of this utility model;

[0028] Figure 8 This is a side view of the intake volume control component of this utility model.

[0029] Figure 9 This is a schematic diagram of the internal structure of the air intake volume control component of this utility model;

[0030] Figure 10 This is a cross-sectional view of the air intake component of this utility model.

[0031] Reference numerals: 1. Protective box; 2. Pump assembly; 201. Base; 202. Pump body; 203. Piston; 204. Outlet connector; 205. Plug rod; 206. Inlet connector; 3. Air compression assembly; 301. Compression pipe; 302. First spring; 303. Sliding disc; 304. Air inlet; 305. Exhaust pipe; 306. Exhaust valve; 307. Exhaust port; 308. Air outlet; 4. Detection assembly; 401. Liquid inlet pipe; 402. Measuring pipe; 403. Sliding sleeve; 404. Obstruction ring; 405. Fixing sleeve; 406. Second spring; 407. Linear variable differential 5. Transformer; 5. Air intake control assembly; 501. Vertical plate; 502. Support plate; 503. Air intake component; 504. First groove; 505. Second groove; 506. First clamping tube; 507. Second clamping tube; 508. Third spring; 509. First sliding plate; 510. First triangular clamping block; 511. First lifting rod; 512. Second sliding plate; 513. Second lifting rod; 514. Second triangular clamping block; 515. Triangular linkage block; 516. Drive source; 517. Transmission rod; 518. Lifting block; 519. Limiting stop bar; 520. Fourth spring; 521. C-shaped claw. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0033] The present invention will be further described below with reference to the embodiments.

[0034] Example: Refer to Figures 1 to 10 A dual-channel piston pump, comprising:

[0035] Protective box 1;

[0036] Pump assembly 2 is fixed to the inner wall of the protective box 1 and is used to pump out liquid;

[0037] Detection component 4 is used to measure the density of the pumped liquid;

[0038] The air intake control component 5 controls the air intake by detecting the density of the liquid through the detection component 4. The air intake control component 5 includes a vertical plate 501 fixed on the inner wall of the protective box 1 and located away from the pump assembly 2. An air intake component 503 is embedded in the inner wall of the vertical plate 501. The air intake component 503 has one air intake end and two air outlet ends. The two air outlet ends are symmetrically distributed vertically and vertically on the side of the air intake component 503 near the pump assembly 2. An air valve is connected to the air intake end. A first clamping tube 506 and a second clamping tube 507 are elastically provided at the connection between the two air outlet ends and the air intake end, respectively. The air intake control component 5 is used to alternately open and close the two air outlet ends when supplying air to the pump assembly 2, and automatically adjust the flow rate of the air outlet ends according to the liquid density measurement of the detection component 4.

[0039] When the pump assembly 2 pumps the liquid, the liquid entering the measuring tube 402 can be detected by the linear variable differential transformer 407 through the setting of the detection assembly 4. The detection result will be controlled by the air intake control assembly 5 to control the air intake compressed air, thereby increasing the sliding speed of the piston 203 inside the pump body 202, thereby increasing the suction pressure and pumping the high-density liquid.

[0040] Reference Figure 3 The pump assembly 2 includes a base 201 fixedly installed on the inner wall of the protective box 1. A pump body 202 is fixedly installed on the upper end face of the base 201. A piston 203 is slidably installed in the center of the inner wall of the pump body 202. The piston 203 divides the interior of the pump body 202 into a first pumping area and a second pumping area. A stopper rod 205 is coaxially fixedly inserted in the piston 203. The first pumping area and the second pumping area are symmetrically connected by an outlet connector 204. The first pumping area and the second pumping area are connected by two inlet connectors 206.

[0041] The piston 203 slides inside the pump body 202, thereby allowing the liquid to be pumped out through the outlet connector 204 and the inlet connector 206.

[0042] Reference Figures 2 to 3It also includes an air compression assembly 3, which includes two compression pipes 301 fixedly installed at both ends of the pump body 202 via connectors. The two ends of the piston rod 205 pass through the pump body 202 and extend into the compression pipes 301 at the corresponding positions, and are fixedly installed with sliding discs 303. An exhaust pipe 305 is fixedly installed at the end of the sliding disc 303 away from the pump body 202. An exhaust valve 306 is fixedly installed at the end of the exhaust pipe 305 away from the sliding disc 303, passing through the compression pipes 301. At least one air outlet 308 is opened on the outer peripheral surface of the exhaust pipe 305 near the sliding disc 303. An exhaust port 307 is opened at the center of the outer peripheral surface of the exhaust pipe 305. An air inlet 304 is connected to the outer peripheral surface of the two compression pipes 301 at the upper position. The air inlet 304 is connected to the two air outlets through pipes. A first spring 302 is fixedly installed on one side of the sliding disc 303 and one side of the inner wall of the compression pipe 301.

[0043] By setting up the compression tube 301, the sliding disc 303 can slide inside the compression tube 301 to compress the internal air, thereby driving the piston 203 to slide inside the pump body 202 to pump out the liquid.

[0044] Reference Figures 5 to 6 The detection component 4 includes an inlet pipe 401 connected to the lower end of the inlet connector 206. The inlet pipe 401 consists of a three-way pipe and short pipes symmetrically connected to both ends of the three-way pipe. The other end of the three-way pipe is connected to the measuring pipe 402. A plurality of second springs 406 are arranged in a circumferential array between the fixed sleeve 405 and the sliding sleeve 403. The sliding sleeve 403 is elastically slidably mounted on the outer circumferential surface of the measuring pipe 402. The sliding sleeve 403 consists of an integrally formed retaining ring and a plurality of retaining blocks arranged in a circumferential array on the inner circumferential surface of the retaining ring. The plurality of retaining blocks all penetrate through the ring. The measuring tube 402 is fixedly mounted with a blocking ring 404. The blocking ring 404 is slidably connected to the inner wall of the measuring tube 402. The inner circumferential surface of the blocking ring 404 has multiple protrusions arranged linearly. A fixing sleeve 405 is fixedly mounted on the outer circumferential surface of the measuring tube 402 near the pump assembly 2. Multiple linear variable differential transformers 407 are embedded in the inner circumferential array of the fixing sleeve 405. The linear variable differential transformer 407 includes a fixed coil, a movable iron core and a central coil. The iron core is connected to a control device via a wire.

[0045] By setting the measuring tube 402, the flowing liquid can be measured. After the liquid flows, it can be transferred to the inlet connector 206 through the three-way pipe and the short pipe respectively, so as to transfer the liquid into the interior of the pump body 202.

[0046] Reference Figures 7 to 10A fourth spring 520 is fixedly installed on the inner wall of the air intake component 503 corresponding to the first clamping tube 506 and the second clamping tube 507. Triangular linkage blocks 515 are fixedly installed on the outer peripheral surface of the second clamping tube 507 near the upper position close to the pump body 202 and on the outer peripheral surface of the first clamping tube 506 near the lower position. A first groove 504 is formed on the upper position of the vertical plate 501 near the pump body 202, and the first groove 504 corresponds to the second clamping tube 507. A second groove 505 is formed on the lower position of the vertical plate 501 near the pump body 202, and the second groove 505 corresponds to the first clamping tube 506. A spring 520 is elastically slidably installed on the inner wall of the first groove 504. A first sliding vane 509 is fixedly mounted with a first triangular locking block 510 on its lower end face. A first lifting rod 511 is fixedly mounted on the side of the first sliding vane 509 near the first locking tube 506. A second sliding vane 512 is elastically slidably mounted on the inner wall of the second groove 505. A second triangular locking block 514 is fixedly mounted on the upper end face of the second sliding vane 512. A second lifting rod 513 is fixedly mounted on the side of the second triangular locking block 514 near the second locking tube 507. A lifting block 518 that is driven to rise and fall is provided on the inner wall of the air intake component 503 near the pump body 202. A C-shaped claw 521 is fixedly mounted on the side of the lifting block 518 away from the pump body 202.

[0047] By setting the C-shaped claw 521, the C-shaped claw 521 is driven to rise and fall, so as to contact the first lifting rod 511 and the second lifting rod 513 respectively, causing the second clamping tube 507 and the first clamping tube 506 to slide inside the air intake 503, thereby alternately supplying air to the two compression tubes 301.

[0048] Reference Figure 8 Two support plates 502 are fixedly installed on the side of the vertical plate 501 near the pump body 202. A transmission rod 517 is rotatably installed between the two support plates 502. The transmission rod 517 consists of a double-acting screw and two round rods symmetrically fixed at both ends of the double-acting screw. The lifting block 518 is sleeved on the double-acting screw and used in conjunction with it. Limiting strips 519 are installed at equal intervals between the air intake component 503 and the two support plates 502. A drive source 516 is fixedly installed on the upper end face of the protection box 1. The output end of the drive source 516 passes through the protection box 1 and is fixedly connected to the transmission rod 517. The drive source 516 is signal connected to the output end of the control device.

[0049] By turning on the drive source 516, the transmission rod 517 is rotated, thereby driving the C-shaped claw 521 to move up and down. The drive source 516 then uses the detection component 4 to measure the liquid and drive the C-shaped claw 521.

[0050] Reference Figure 10A third spring 508 is fixedly installed between the upper end face of the first slider 509 and the inner wall of the first groove 504, and between the lower end face of the second slider 512 and the inner wall of the second groove 505.

[0051] The third spring 508 allows the first slider 509 and the second slider 512 to rebound when they slide together.

[0052] The working principle of this utility model is as follows:

[0053] When pumping different liquids, the density of the liquid is first detected. The detection results for liquids of different densities are transmitted to the drive source 516 via the control device. The drive source 516 then drives the C-shaped chuck 521 to adjust the air intake, supplying air into the compression pipe 301 to regulate the internal pressure of the compression pipe 301. This, in turn, drives the piston 203 to move within the pump body 202, generating different pumping pressures according to the liquid density. This allows for the pumping of liquids of different densities. The specific working method is as follows:

[0054] The system extracts and discharges air by connecting an external air pump to the air inlet of the air inlet 503, supplying air to two outlets. These outlets are connected to the air inlet 304 via pipes, supplying air to the inside of the compression pipe 301. As the gas enters the compression pipe 301, the continuously supplied gas pressurizes the space between the compression pipe 301 and the sliding disc 303. This pressurized gas pushes the sliding disc 303 and the piston rod 205 to move. During this movement, the sliding disc 303 compresses the first spring 302 and simultaneously presses against the side of the sliding disc 303 closest to the piston 203. When the piston rod 205 moves, it drives the piston 203 to move. When the piston 203 moves, it squeezes the first extraction zone. When air is injected into the compression pipe 301 on the other side, the piston 203 slides into the second extraction zone through transmission. According to the above process, by alternately supplying air to the two compression pipes 301, the piston 203 is driven to slide back and forth inside the pump body 202 fixed on the upper end face of the base 201, thereby alternately increasing and decreasing the air pressure in the first extraction zone and the second extraction zone.

[0055] When piston 203 moves towards the first discharge zone, the air pressure inside the first discharge zone is compressed, increasing its internal pressure. This causes liquid to be discharged outward from the outlet connector 204 connected to the inside of the first discharge zone, and then drawn in by the inlet connector 206 connected to the second discharge zone, reducing its internal pressure. This allows liquid to be drawn into the second discharge zone through the inlet connector 206. Conversely, when piston 203 moves towards the second discharge zone, the air pressure inside the second discharge zone is compressed, increasing its internal pressure. This causes liquid to be discharged outward from the outlet connector 204 connected to the inside of the second discharge zone, and then drawn in by the inlet connector 206 connected to the inside of the first discharge zone, reducing its internal pressure. This allows liquid to be drawn into the first discharge zone through the inlet connector 206. This process continues repeatedly, creating a pumping effect on the liquid.

[0056] It should be noted that when air is supplied to one of the compression pipes 301 through the air inlet 304, the exhaust valve 306 continuously releases air. The inner diameter of the air inlet 304 is larger than the inner diameter of the exhaust pipe 305. The air pressure inside the compression pipe 301 is increased by using the air volume difference between the air inlet 304 and the exhaust valve 306. This increases the air pressure, allowing the sliding disc 303 to be pushed by the increased air pressure, thereby driving the piston 203 to move.

[0057] When pumping out liquids with higher densities, the air pressure entering the compression tube 301 increases, while when pumping out liquids with lower densities, the air pressure entering the compression tube 301 decreases. This is to cope with the resistance caused by pumping out liquids of different densities. After the gas entering the compression tube 301 increases the air pressure inside, the air output of the exhaust valve 306 remains unchanged. This allows the gas entering the compression tube 301 to increase the air pressure inside the compression tube 301, thereby increasing the power of the piston 203 to move and pump out liquids with different resistance.

[0058] It should also be noted that when one compression pipe 301 is alternately supplied with air, the other compression pipe 301 will stop supplying air, and the gas inside will be slowly discharged outward through the exhaust valve 306. When the compression pipe 301 that is being supplied with air drives the piston 203 to slide, the air pressure in the compression pipe 301 on the side where the air supply is stopped will not hinder the piston 203 from sliding. When the piston 203 slides inside the pump body 202, it will drive the stop rod 205 and the sliding plate 303 to slide, thereby driving the exhaust pipe 305 in the compression pipe 301 that has stopped supplying air to move away from the pump body 202. The exhaust pipe 305 moves outward, causing the exhaust port 307 to move out of the interior of the compression pipe 301. The exhaust port 307 will allow the air pressure inside the compression pipe 301 to enter the exhaust pipe 305 through the air outlet 308, and then be discharged outward from the exhaust port 307, thereby completely reducing the air pressure inside the compression pipe 301.

[0059] The measurement involves connecting the liquid to be pumped to the measuring pipe 402 via a pipe, and then connecting it to the inlet connector 206 via the inlet pipe 401. The liquid is then transported into the first and second pumping zones inside the pump body 202. During the pumping process in the first and second pumping zones, the liquid enters the inlet pipe 401 from inside the measuring pipe 402 and is connected to the inlet connector 206 via the corresponding short pipe, thus delivering the liquid to the first or second pumping zone.

[0060] When the liquid enters the measuring tube 402, it impacts multiple protrusions within the obstruction ring 404. (Liquids of different densities may exert varying degrees of resistance and pressure on the obstruction ring 404 upon impact. Liquids with higher densities may experience greater resistance and pressure upon contact with the obstruction ring 404, resulting in a larger sliding range. Liquids with lower densities may exert less resistance and pressure on the obstruction ring 404 during flow, leading to a smaller sliding range.) When the higher-density liquid impacts the protrusions within the obstruction ring 404, it causes the obstruction ring 404 to slide relatively significantly within the measuring tube 402. During this sliding, the obstruction ring 404, via a locking block, causes the sliding sleeve 403 to slide. The sliding sleeve 403, in turn, compresses the second spring 406, simultaneously moving the iron core composed of the linear variable differential transformer 407. By supplying power to the movable coil, the movement of the iron core causes the central coil and the movable coil to move. The coupling coefficient between the moving coils changes, causing a change in the induced electromotive force in the induction coil (a linear variable differential transformer is a device used for electrical signal regulation in a power system; its basic structure includes a main coil and an auxiliary coil, achieving electromagnetic induction through the coupling of magnetic materials). When liquids of different densities impact the multiple protrusions of the linear array on the inner circumference of the impediment ring 404, the impediment ring 404 will slide to different degrees according to its density. Liquids with lower density will cause the impediment ring 404 to slide to a smaller extent, while liquids with higher density will cause the impediment ring 404 to slide to a larger extent. This allows the linear variable differential transformer 407 to induce different electrical signals. The magnitude of the electrical signal is proportional to the sliding amplitude; that is, a small sliding amplitude will cause the linear variable differential transformer 407 to generate a small electrical signal, while a large sliding amplitude will cause the linear variable differential transformer 407 to generate a large electrical signal. The different electrical signals generated will be transmitted to the input terminal of the control device (not shown in the figure) through wires.

[0061] The air supply is achieved by connecting an external air pump to the air inlet of the air inlet 503. The air inlet continuously supplies air to the two outlets. However, due to the design of the first clamping tube 506 and the second clamping tube 507, the air supply is blocked during transport by the elastic tension of the fourth spring 520, which causes the first clamping tube 506 and the second clamping tube 507 to move (see appendix). Figure 10The control device generates electrical signals of varying magnitudes by causing the liquid to slide at different degrees along the obstruction ring 404. These signals are then connected to the drive source 516 via the output of the control device (the electrical signals are only provided to the control device for determining the forward and reverse driving time and lifting / lowering amplitude of the drive source 516). During the forward and reverse rotation of the drive rod 517 within a working unit time, the C-shaped chuck 521 is driven to rise and fall. When the electrical signals are transmitted to the drive source 516, the drive source 516 adjusts the number of rotations of the drive rod 517 based on the magnitude of the signals, thereby adjusting the position of the C-shaped chuck 521 within the drive source 516. During the rotation per unit time, the magnitude of the driven lifting amplitude varies. A smaller electrical signal will cause the drive source 516 to drive the transmission rod 517 to rotate a smaller number of times, thereby causing the transmission rod 517 to drive the lifting block 518 and the C-shaped claw 521 to lift a small amplitude. A larger electrical signal will cause the drive source 516 to drive the transmission rod 517 to rotate a larger number of times, thereby causing the transmission rod 517 to drive the lifting block 518 and the C-shaped claw 521 to lift a large amplitude. When the C-shaped claw 521 is driven to lift, the claw alternately contacts the first lifting rod 511 and the second lifting rod 513 during the lifting process, thereby causing the air inlet to alternately supply air to the two air outlets.

[0062] When the C-shaped claw 521 slides downward, it will contact the first lifting rod 511. The first lifting rod 511 will drive the first sliding plate 509 to slide downward in the first groove 504, stretching the third spring 508, and causing the first triangular block 510 to contact the triangular linkage block 515. The first triangular block 510 and the triangular linkage block 515 are triangles with inclined surfaces in contact. After the first triangular block 510 descends and contacts the triangular linkage block 515, it will squeeze the triangular linkage block 515 and the second clamping tube 507 to slide inside the air intake 503, so that the gas provided by the air intake end flows out from the air outlet end.

[0063] When the C-shaped claw 521 rises, it will contact the second lifting rod 513. The second lifting rod 513 drives the second sliding plate 512 to rise inside the second groove 505, stretching the third spring 508. This causes the second triangular block 514 to contact the triangular linkage block 515. The second triangular block 514 and the triangular linkage block 515 are triangles with inclined surfaces in contact. After the second triangular block 514 descends and contacts the triangular linkage block 515, it will squeeze the triangular linkage block 515 and the first clamping tube 506 to slide inside the air inlet 503, thereby allowing the gas supplied by the air inlet to flow out from the air outlet.

[0064] It should be noted that the C-shaped claw 521 is driven to lift and lower. The C-shaped claw 521 can contact the first lifting rod 511 and the second lifting rod 513 respectively during the lifting and lowering process, so as to squeeze the first lifting rod 511 and the second lifting rod 513 respectively, thereby driving the second clamping tube 507 and the first clamping tube 506 from the state of blocking the air supply to the state of air supply. The output air volume is determined by the lifting and lowering range of the C-shaped claw 521.

[0065] The linear variable differential transformer 407 measures electrical signals of different magnitudes and sends them to the input of the control device. The output of the control device is then connected to the drive source 516, which drives the transmission rod 517 to rotate according to the magnitude of the electrical signal output by the control device. The number of rotations of the transmission rod 517 directly affects the lifting block 518 and the C-shaped claw 521, thereby adjusting the lifting amplitude of the C-shaped claw 521 to squeeze the first lifting rod 511 and the second lifting rod 513. When the lifting amplitude is low, the first lifting rod 511 and the second lifting rod 513 are squeezed lightly, creating a small air inlet, allowing a small amount of air to be supplied to the two air outlets. When the lifting amplitude is large, a larger air inlet is created, and the first lifting rod 511 and the second lifting rod 513 are squeezed more heavily, creating a larger air inlet, allowing a large amount of air to be supplied to the two air outlets.

[0066] Different air supply volumes are connected to the compression pipe 301 through pipes, so that the sliding disc 303 inside the compression pipe 301 slides to different degrees, driving the piston 203 to slide. According to the input air volume, different pumping pressures are provided to pump out liquids of different densities.

[0067] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of this utility model.

Claims

1. A dual-channel piston pump, characterized in that, include: Protective box (1); Pump assembly (2), which is fixed to the inner wall of the protective box (1) and used for pumping liquid; Detection component (4), the detection component (4) is used to measure the density of the pumped liquid; An air intake control component (5) is used to control the air intake by detecting the density of the liquid through a detection component (4). The air intake control component (5) includes a vertical plate (501) fixed on the inner wall of the protective box (1) and located away from the pump assembly (2). An air intake component (503) is embedded in the inner wall of the vertical plate (501). The air intake component (503) has one air intake end and two air outlet ends. The two air outlet ends are symmetrically distributed vertically and vertically on the side of the air intake component (503) near the pump assembly (2). An air valve is connected to the air intake end. A first clamp (506) and a second clamp (507) are elastically provided at the connection between the two air outlet ends and the air intake end, respectively. The air intake control component (5) is used to alternately open and close the two air outlet ends when supplying air to the pump assembly (2), and automatically adjust the flow rate of the air outlet end according to the liquid density measurement of the detection component (4).

2. The dual-channel piston pump according to claim 1, characterized in that, The pump assembly (2) includes a base (201) fixedly installed on the inner wall of the protective box (1). A pump body (202) is fixedly installed on the upper surface of the base (201). A piston (203) is slidably installed in the center of the inner wall of the pump body (202). The piston (203) divides the interior of the pump body (202) into a first pumping area and a second pumping area. A stopper rod (205) is coaxially fixedly inserted in the piston (203). The first pumping area and the second pumping area are symmetrically connected by an outlet connector (204). The first pumping area and the second pumping area are connected by two inlet connectors (206).

3. A dual-channel piston pump according to claim 2, characterized in that, It also includes the air compression assembly (3), which includes two compression pipes (301) fixedly installed at both ends of the pump body (202) via connectors. The two ends of the piston rod (205) pass through the pump body (202) and extend into the compression pipes (301) at corresponding positions, and are fixedly installed with sliding discs (303). An exhaust pipe (305) is fixedly installed at the end of the sliding disc (303) away from the pump body (202), and the end of the exhaust pipe (305) away from the sliding disc (303) passes through the compression pipes (301) and is fixedly installed with the piston rod (305). An exhaust valve (306) is fixedly installed. At least one air outlet (308) is provided on the outer peripheral surface of the exhaust pipe (305) near the sliding plate (303). An exhaust port (307) is provided at the center of the outer peripheral surface of the exhaust pipe (305). An air inlet (304) is connected to the upper part of the outer peripheral surface of the two compression pipes (301). The air inlet (304) is connected to the two air outlets through pipes. A first spring (302) is fixedly installed on one side of the sliding plate (303) and one side of the inner wall of the compression pipe (301).

4. A dual-channel piston pump according to claim 2, characterized in that, The detection component (4) includes an inlet pipe (401) connected to the lower end of the inlet connector (206). The inlet pipe (401) consists of a three-way pipe and short pipes symmetrically connected to both ends of the three-way pipe. The other end of the three-way pipe is connected to the measuring pipe (402). A plurality of second springs (406) are arranged in a circumferential array between the fixed sleeve (405) and the sliding sleeve (403). The sliding sleeve (403) is elastically slidably mounted on the outer circumferential surface of the measuring pipe (402). The sliding sleeve (403) consists of an integrally formed retaining ring and a plurality of retaining blocks arranged in a circumferential array on the inner circumferential surface of the retaining ring. The plurality of retaining blocks are all through A measuring tube (402) is connected to a blocking ring (404) which is slidably connected to the inner wall of the measuring tube (402). The inner circumferential surface of the blocking ring (404) has multiple protrusions arranged linearly. A fixing sleeve (405) is fixedly installed on the outer circumferential surface of the measuring tube (402) near the pump assembly (2). Multiple linear variable differential transformers (407) are embedded in the inner circumferential array of the fixing sleeve (405). The linear variable differential transformer (407) consists of a fixed coil, a movable iron core, and a central coil. The iron core is connected to a control device via a wire.

5. A dual-channel piston pump according to claim 1, characterized in that, A fourth spring (520) is fixedly installed on the inner wall of the air inlet component (503) corresponding to the second clamping tube (507) and the first clamping tube (506). Triangular linkage blocks (515) are fixedly installed on the outer peripheral surface of the second clamping tube (507) near the upper position close to the pump body (202) and on the outer peripheral surface of the first clamping tube (506) near the lower position. A first groove (504) is provided on the upper position of the side of the vertical plate (501) close to the pump body (202), and the first groove (504) corresponds to the second clamping tube (507). A second groove (505) is provided on the lower position of the side of the vertical plate (501) close to the pump body (202), and the second groove (505) corresponds to the first clamping tube (506). A first sliding spring is elastically slidably installed on the inner wall of the first groove (504). The first slide (509) has a first triangular block (510) fixedly installed on its lower end face. The first slide (509) has a first lifting rod (511) fixedly installed on the side of the first slide (509) near the first clamping tube (506). The second slide (512) is elastically slidably installed on the inner wall of the second groove (505). The second slide (512) has a second triangular block (514) fixedly installed on its upper end face. The second triangular block (514) has a second lifting rod (513) fixedly installed on the side of the second triangular block (514) near the second clamping tube (507). The air intake component (503) has a lifting block (518) that is driven to rise and fall at a position near the pump body (202). The lifting block (518) has a C-shaped claw (521) fixedly installed on the side away from the pump body (202).

6. A dual-channel piston pump according to claim 5, characterized in that, Two support plates (502) are fixedly installed on the side of the vertical plate (501) near the pump body (202). A transmission rod (517) is rotatably installed between the two support plates (502). The transmission rod (517) consists of a double-acting screw and two round rods symmetrically fixed at both ends of the double-acting screw. The lifting block (518) is sleeved on the double-acting screw and used in conjunction with it. Limiting strips (519) are installed at equal intervals between the air intake component (503) and the two support plates (502). A drive source (516) is fixedly installed on the upper surface of the protective box (1). The output end of the drive source (516) passes through the protective box (1) and is fixedly connected to the transmission rod (517). The drive source (516) is signal-connected to the output end of the control device.

7. A dual-channel piston pump according to claim 1, characterized in that, A third spring (508) is fixedly installed between the upper end face of the first slider (509) and the inner wall of the first groove (504), and between the lower end face of the second slider (512) and the inner wall of the second groove (505).

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