Industrial injection pump

Abstract

The utility model relates to an industrial injection pump and belongs to the technical field of industrial injection. A longitudinal partition plate is arranged in the middle in the shell, a first stepping motor is arranged in the shell on one side of the longitudinal partition plate, a transmission lead screw is movably installed in the shell below the first stepping motor, the transmission lead screw is connected with the first stepping motor, a lead screw nut is installed on the transmission lead screw, and the lead screw nut is connected with the shell through a linear guide rail. A mounting plate is arranged on the lead screw nut and extends to the outer side of the shell, a photoelectric sensor is mounted at the other end of the lead screw nut, a sample injection assembly is mounted on the mounting plate, a three-way ball valve is connected to one end of the sample injection assembly, a rotating shaft is inserted into the three-way ball valve, one end of the rotating shaft extends into the shell, and a grating sensor is mounted on the rotating shaft extending into the shell; and a second stepping motor is arranged on the right side end surface of the longitudinal partition plate corresponding to the rotating shaft, and is connected with the rotating shaft through a coupler. The industrial injection pump is convenient to maintain and carry, and meanwhile the one-time injection capacity can be rapidly adjusted.

Description

Technical Field

[0001] The utility model relates to an industrial injection pump, belonging to the technical field of industrial injection. Background Art

[0002] Industrial syringe pumps are a tool that can achieve high-precision, smooth and pulsation-free liquid transmission. They are widely used in sample water intake or microinjection, as well as the stable addition of reagents in chemical experiments. Taking sample water intake as an example, industrial syringe pumps can stably and quantitatively intake sample water, so as to accurately further detect conventional characteristic parameters such as COD, BOD, ammonia nitrogen, temperature, pH value, conductivity, dissolved oxygen and turbidity in the water.

[0003] The Chinese Patent Network has published a patent announcement number CN105467142B, an invention patent for an industrial syringe pump, which includes a pump body and an automatic injection device. The automatic injection device includes a machine base, on which are mounted an electromagnetic valve, a transmission assembly, an injection assembly and a circuit control board, which is connected to an external program control device. Although the industrial syringe pump can achieve high-precision, smooth and pulsation-free transmission of liquids, its transmission assembly adopts a gear and rack meshing method to achieve the uptake and delivery of liquids by the injection assembly. The use of a gear and rack method will inevitably lead to a larger overall volume and a more complex internal structure, which is inconvenient to maintain or carry. On the other hand, in some microinjection operations, the syringe of the industrial syringe pump has a fixed injection capacity at one time, which cannot meet the injection capacity of different sizes at one time. It is often necessary to replace syringes of different specifications multiple times, and the process of completely disassembling and assembling the syringe barrel is troublesome, and the purpose of quickly adjusting the injection capacity cannot be achieved. Therefore, it is necessary to improve it. Summary of the Invention

[0004] The purpose of the utility model is to provide an industrial injection pump which has a simple structure, is convenient to maintain and carry, and can quickly adjust the size of the injection volume at one time.

[0005] The technical solution of the utility model is:

[0006] An industrial injection pump includes a shell, which is characterized in that: a longitudinal diaphragm is provided in the middle position of the shell, a first stepper motor is provided in the shell on one side of the longitudinal diaphragm, a transmission screw is movably installed in the shell below the first stepper motor, the transmission screw is connected to the first stepper motor, a screw nut is provided on the transmission screw, the screw nut is connected to the shell through a linear guide rail, a mounting plate is provided on the screw nut, the mounting plate extends to the outside of the shell, a photoelectric sensor is provided at the other end of the screw nut, an injection assembly is installed on the mounting plate, one end of the injection assembly is connected to a three-way ball valve, a rotating shaft is inserted on the three-way ball valve, one end of the rotating shaft extends into the shell, a grating sensor is provided on the rotating shaft extending into the shell, a second stepper motor is installed on the right end face of the longitudinal diaphragm corresponding to the rotating shaft, and the second stepper motor is connected to the rotating shaft through a coupling.

[0007] A switch is installed in the housing below the second stepper motor, and a touch display screen is installed in the housing below the switch. The switch and the touch display screen are electrically connected to the first stepper motor and the second stepper motor.

[0008] The three-way ball valve includes a valve body and a valve core. The valve body is cylindrical, and an assembly hole is provided in the center of the valve body. The valve core is movably installed in the assembly hole. The valve core is fixedly connected to the rotating shaft. A liquid channel is radially provided on the circumference of the valve core. The liquid channel is bent. A liquid inlet channel, a liquid outlet channel and a liquid intake channel are radially provided on the circumference of the valve body. The liquid inlet channel, the liquid outlet channel and the liquid intake channel are respectively connected with the assembly hole. Through the different rotation angles of the valve core, the liquid channel of the valve core can connect the liquid inlet channel and the liquid intake channel or connect the liquid outlet channel and the liquid intake channel.

[0009] The sampling assembly comprises a sampling syringe and a connecting block. The push rod of the sampling syringe is fixedly connected to the connecting block by bolts, and the connecting block is fixedly connected to the mounting plate by bolts.

[0010] The injection assembly includes a positioning plate, a sleeve is slidably installed on the positioning plate through a tension spring, a cylinder is movably installed on the sleeve through a bearing, and a positioning column is inserted between one end of the cylinder and the positioning plate to realize the positioning of the cylinder. A plurality of injection cavities with different diameters are provided on the cylinder, and a push rod is provided in the injection cavity. A piston is provided at one end of the push rod, and an external thread is provided at the other end of the push rod. The external thread at the other end of the push rod is threadedly installed with the mounting plate, and a connecting pipe is provided on the positioning plate corresponding to the injection cavity.

[0011] The injection cavity is in the shape of a variable diameter cylinder, and the small diameter port at the top end of the injection cavity is connected with the connecting pipe by plugging.

[0012] The beneficial effects of the present invention compared with the prior art are:

[0013] The industrial syringe pump drives the syringe barrel of the injection assembly through the first stepper motor, and the first stepper motor cooperates with the grating assembly to drive the rotating shaft to rotate back and forth at a certain angle, thereby driving the valve core to rotate through the rotating shaft to achieve staggered opening and closing of the liquid inlet channel and the liquid outlet channel, further realizing the intake and injection of liquid. The injection volume can be quickly switched through the multiple injection cavities of different diameters of the injection assembly. Compared with the traditional disassembly and replacement of the syringe barrel, the injection assembly is quick to operate and does not require complete disassembly and assembly, and can meet the injection volume requirements of different sizes at a time. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a front view structural diagram of the utility model;

[0015] Figure 2 This is a schematic diagram of the front-view three-dimensional structure of the present invention;

[0016] Figure 3 This is a schematic cross-sectional view of the valve core in the present invention;

[0017] Figure 4 This is a schematic diagram of the three-dimensional structure of the improved injection assembly in the present utility model;

[0018] Figure 5 This is a schematic diagram of the three-dimensional structure of the improved injection assembly in the present invention from another perspective.

[0019] In the figure: 1. Shell; 2. Longitudinal partition; 3. First stepper motor; 4. Transmission screw; 5. Screw nut; 6. Photoelectric sensor; 7. Mounting plate; 8. Sample injection syringe; 9. Connecting block; 10. Valve body; 11. Valve core; 12. Liquid inlet channel; 13. Liquid outlet channel; 14. Liquid collection channel; 15. Rotating shaft; 16. Grating disk; 17. Grating sensor; 18. Second stepper motor; 19. Power switch; 20. Touch screen; 21. Battery; 22. TAP-C interface; 23. Positioning plate; 24. Tension spring; 25. Guide rod; 26. Sleeve; 27. Cylinder; 28. Positioning column; 29. ​​Positioning hole; 30. Injection cavity; 31. Connecting pipe; 32. Push rod; 33. External thread; 34. Liquid inlet pipe; 35. Liquid outlet pipe; 36. Liquid channel. DETAILED DESCRIPTION

[0020] As attached Figure 1-5 shown

[0021] The industrial injection pump includes a housing 1, a longitudinal diaphragm 2 is provided in the middle position of the housing 1, a first stepper motor 3 is fixedly installed in the housing 1 on one side of the longitudinal diaphragm 2, a transmission screw 4 is movably installed in the housing 1 below the first stepper motor 3, and the transmission screw 4 is connected to the first stepper motor 3. When working, the first stepper motor 3 can drive the transmission screw 4 to rotate.

[0022] A screw nut 5 is threadedly installed on the transmission screw 4, and the screw nut 5 is connected to the housing 1 through a linear guide rail. The linear guide rail guides and limits the screw nut 5. When the transmission screw 4 rotates, it drives the screw nut 5 to slide along the axial direction of the linear guide rail.

[0023] A photoelectric sensor 6 (model: Omron EE-SX1109) is fixedly installed on the longitudinal partition 2 corresponding to the screw nut 5. When working, the photoelectric sensor 6 is used to detect whether the screw nut 5 moves up and down and moves into place.

[0024] A mounting plate 7 is fixedly mounted on the screw nut 5, and the mounting plate 7 extends to the outside of the housing 1. An injection assembly is mounted on the mounting plate 7 extending to the outside of the housing 1. The injection assembly includes an injection syringe 8 and a connecting block 9. The piston pusher and puller of the injection syringe 8 is fixedly connected to the connecting block 9 by bolts. The connecting block 9 is fixedly connected to the mounting plate 7 extending to the outside of the housing 1 by bolts. The injection port of the injection syringe 8 is connected to a three-way ball valve. The three-way ball valve includes a valve body 10 and a valve core 11. The valve body 10 is cylindrical. An assembly hole is provided in the center of the valve body 10. A valve core 11 is movably mounted in the assembly hole. The valve core 11 is cylindrical. The valve body 1 A liquid inlet channel 12, a liquid outlet channel 13, and a liquid collection channel 14 are radially provided on the circumference of the valve core 11. The injection port of the sample injection syringe 8 is connected to the liquid collection channel 14. The liquid inlet channel 12, the liquid outlet channel 13, and the liquid collection channel 14 are respectively connected to the assembly hole. The liquid inlet channel 12 is externally connected to a liquid inlet pipe 34, and the liquid outlet channel 13 is externally connected to a liquid outlet pipe 35. A liquid channel 36 is radially provided on the circumference of the valve core 11. The liquid channel 36 is bent. During operation, the liquid channel 36 of the valve core 11 can connect the liquid inlet channel 12 and the liquid collection channel 14 or connect the liquid outlet channel 13 and the liquid collection channel 14 according to the different rotation angles of the valve core 11.

[0025] A rotating shaft 15 is fixedly installed on the valve core 11 of the three-way ball valve, one end of the rotating shaft 15 extends into the housing 1, and a grating disk 16 is fixedly installed on the rotating shaft 15 extending into the housing 1. A grating sensor 17 (model is Yipu TCB3) is installed on the housing 1 corresponding to the grating disk 16. A second stepper motor 18 is fixedly installed on the right end face of the longitudinal partition 2 corresponding to the rotating shaft 15. The second stepper motor 18 is connected to the rotating shaft 15 through a coupling. When working, the rotating shaft 15 is driven to rotate by the second stepper motor 18, and the rotating shaft 15 drives the valve core 11 to rotate synchronously. When the rotating shaft 15 synchronously drives the grating disk 16 to rotate, the grating sensor 17 can detect the grating disk 16.

[0026] A power switch 19 is installed in the housing 1 below the second stepper motor 18, and a touch screen 20 is installed in the housing 1 below the power switch 19. The power switch 19 and the touch screen 20 are electrically connected to the first stepper motor 3 and the second stepper motor 18. A program controller (model Siemens S7-800) and a battery 21 are installed in the housing 1 below the touch screen 20; the program controller is electrically connected to the battery 21, the power switch 19, the touch screen 20, the grating sensor 17, the photoelectric sensor 6, the first stepper motor 3 and the second stepper motor 18, and the program controller controls the touch screen 20, the grating sensor 17, the photoelectric sensor 6, the first stepper motor 3 and the second stepper motor 18 in sequence and order.

[0027] The program controller is externally connected to a tap-c interface 22, which can be conveniently connected to a power bank for emergency backup battery power supply.

[0028] When the industrial syringe pump is used, taking industrial sample water as an example, first connect the liquid inlet pipe 34 to the industrial sample water to be taken, connect the liquid outlet pipe 35 to the detection mechanism, then turn on the power switch 19, select the extraction volume through the touch screen 20, and after the program controller receives the volume signal sent by the touch screen 20, start the second stepper motor 18, and the second stepper motor 18 drives the rotating shaft 15 and the valve core 11 to rotate clockwise synchronously. When the liquid channel 36 of the valve core 11 is connected to the liquid inlet channel 12 and the liquid collection channel 14, the meter The valve core 11 moves to the right position, and the grating disk 16 rotates a certain angle along the rotating shaft 15. The grating sensor 17 senses the cross section of the grating disk 16, and the grating sensor 17 transmits the right position signal to the program controller, which controls the second stepper motor 18 to stop rotating. At this time, the program controller starts the first stepper motor 3, and the first stepper motor 3 drives the transmission screw 4 to rotate clockwise. The transmission screw 4 drives the screw nut 5 to reciprocate along the linear guide rail, and the screw nut 5 drives the piston pusher and puller to move downward through the mounting plate 7. The industrial sample water is taken into the sampling syringe 8 through the syringe piston of the sampling syringe 8. When the screw nut 5 moves to the right position, the photoelectric sensor 6 detects the position signal of the screw nut 5 and transmits the position signal to the program controller. The program controller controls the second stepper motor 18 to rotate. The second stepper motor 18 drives the valve core 11 to rotate counterclockwise through the rotating shaft 15. When the valve core 11 rotates a certain angle and the grating sensor 17 detects the position signal, the program controller stops it. At this time, the liquid outlet channel 13 and the liquid intake channel 14 are connected. Then, the program controller controls the transmission screw 4 to rotate counterclockwise. The screw nut 5 drives the piston pusher and puller to move upward through the mounting plate 7, thereby injecting the industrial sample water into the detection mechanism through the syringe piston of the sampling syringe 8 and the liquid outlet pipe 35. The above steps are repeated. The reciprocating motion of the piston pusher and puller cooperates with the three-way ball valve to realize the intake and injection of industrial sample water until the industrial sample water is injected to the specified volume. The program controller stops the rotation of the first stepper motor 3 and the second stepper motor.

[0029] As an improved technical solution of the injection assembly in the present invention, the injection assembly includes a positioning plate 23, the cross-section of the positioning plate 23 is "L"-shaped, the positioning plate 23 is fixedly mounted on the shell 1, and a sleeve 26 is slidably mounted on the positioning plate 23 through a tension spring 24 and a guide rod 25. The sleeve 26 is fixedly connected to the guide rod 25, and the guide rod 25 and the positioning plate 23 are slidably inserted. The tension spring 24 is arranged between the sleeve 26 and the positioning plate 23, and the sleeve 26 is annular. A cylinder 27 is movably installed in the sleeve 26 through a bearing, and one end of the cylinder 27 is inserted into the positioning plate 23 through a positioning column 28. A positioning hole 29 is provided at the center of the end face of the cylinder 27, and the positioning column 28 is movably inserted into the positioning hole 29. During operation, the positioning of the cylinder 27 is achieved by cooperating with the positioning column 28 and the positioning hole 29.

[0030] The barrel 27 is a cylinder, and is provided with multiple injection cavities 30 of different diameters. The injection cavity 30 is a variable diameter cylindrical shape, and the diameter of the top narrow-diameter port of each injection cavity 30 is the same. The top narrow-diameter ports of each injection cavity 30 are arranged in a circular array along the end face of the barrel 27; a connecting tube 31 is fixedly installed on the positioning plate 23 corresponding to the top narrow-diameter port of one of the injection cavities 30, and the top narrow-diameter port of the injection cavity 30 is connected to the connecting tube 31 through plug-in connection.

[0031] A push rod 32 is provided in the thick-diameter port at the bottom end of each injection cavity 30, and a piston is fixedly installed at one end of the push rod 32. The piston and the thick-diameter cavity at the bottom end of the injection cavity 30 are slidingly and sealedly connected. During operation, the push rod 32 drives the piston to move up and down along the injection cavity 30 to realize the intake and injection of liquid. The other end of the push rod 32 is provided with an external thread 33, and the external thread 33 at the other end of the push rod 32 is threadedly installed with the mounting plate 7.

[0032] During the microinjection process, when it is necessary to switch the injection capacity, first pull the cylinder 27 downward so that the top narrow-diameter port of the injection cavity 30 of the cylinder 27 is separated from the connecting tube 31. At this time, the tension spring 24 is extended to store energy, and the cylinder 27 is manually rotated so that the required injection cavity 30 corresponds to the connecting tube 31. The cylinder 27 is relaxed. Under the elastic force of the tension spring 24, the cylinder 27 moves upward, and the top narrow-diameter port of the required injection cavity 30 of the cylinder 27 is plugged into and connected with the connecting tube 31. Then the push rod 32 in the required injection cavity 30 is threadedly connected to the mounting plate 7, thereby completing the adjustment operation of the injection capacity.

Claims

1. An industrial injection pump, comprising a housing (1), characterized in that: A longitudinal partition (2) is provided in the middle position of the housing (1), a first stepper motor (3) is provided in the housing (1) on one side of the longitudinal partition (2), a transmission screw (4) is movably installed in the housing (1) below the first stepper motor (3), the transmission screw (4) is connected to the first stepper motor (3), a screw nut (5) is installed on the transmission screw (4), the screw nut (5) is connected to the housing (1) through a linear guide rail, a mounting plate (7) is provided on the screw nut (5), and the mounting plate (7) extends to the outside of the housing (1) On the side, the other end of the screw nut (5) is equipped with a photoelectric sensor (6), the mounting plate (7) is equipped with an injection assembly, one end of the injection assembly is connected to a three-way ball valve, the three-way ball valve is plugged with a rotating shaft (15), one end of the rotating shaft (15) extends into the housing (1), and a grating sensor (17) is installed on the rotating shaft (15) extending into the housing (1). A second stepper motor (18) is installed on the right end surface of the longitudinal partition (2) corresponding to the rotating shaft (15), and the second stepper motor (18) is connected to the rotating shaft (15) through a coupling.

2. An industrial injection pump according to claim 1, characterized in that: A switch is installed in the housing (1) below the second stepper motor (18), and a touch screen (20) is installed in the housing (1) below the switch. The switch and the touch screen (20) are electrically connected to the first stepper motor (3) and the second stepper motor (18).

3. An industrial injection pump according to claim 1, characterized in that: The three-way ball valve comprises a valve body (10) and a valve core (11), the valve body (10) being cylindrical, a mounting hole being provided at the center of the valve body (10), a valve core (11) being movably installed in the mounting hole, the valve core (11) being fixedly connected to the rotating shaft (15), a liquid channel (36) being radially provided on the circumference of the valve core (11), the liquid channel (36) being bent, a liquid inlet channel (12), a liquid outlet channel (13) and a liquid collection channel (14) being radially provided on the circumference of the valve body (10), the liquid inlet channel (12), the liquid outlet channel (13) and the liquid collection channel (14) being respectively connected to the mounting hole, and the liquid channel (36) of the valve core (11) can be connected to the liquid inlet channel (12) and the liquid collection channel (14) or to the liquid outlet channel (13) and the liquid collection channel (14) by different rotation angles of the valve core (11).

4. An industrial injection pump according to claim 1, characterized in that: The injection assembly comprises an injection syringe (8) and a connecting block (9), wherein the push rod (32) of the injection syringe (8) is fixedly connected to the connecting block (9) by bolts, and the connecting block (9) is fixedly connected to the mounting plate (7) by bolts.

5. An industrial injection pump according to claim 1, characterized in that: The injection assembly includes a positioning plate (23), a sleeve (26) is slidably mounted on the positioning plate (23) through a tension spring (24), a cylinder (27) is movably mounted on the sleeve (26) through a bearing, one end of the cylinder (27) is fitted with the positioning plate (23) through a positioning column (28) to achieve positioning of the cylinder (27), a plurality of injection cavities (30) of different diameters are provided on the cylinder (27), a push rod (32) is provided in the injection cavity (30), a piston is provided at one end of the push rod (32), an external thread (33) is provided at the other end of the push rod (32), the external thread (33) at the other end of the push rod (32) is threadedly mounted with the mounting plate (7), and a connecting pipe (31) is provided on the positioning plate (23) corresponding to the injection cavity (30).

6. An industrial injection pump according to claim 5, characterized in that: The injection cavity (30) is in the shape of a variable diameter cylinder, and the small diameter port at the top end of the injection cavity (30) is connected to the connecting pipe (31) by means of a plug-in connection.

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