CN210371052U - Constant-speed constant-pressure pump device - Google Patents
Constant-speed constant-pressure pump device Download PDFInfo
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- CN210371052U CN210371052U CN201921408418.0U CN201921408418U CN210371052U CN 210371052 U CN210371052 U CN 210371052U CN 201921408418 U CN201921408418 U CN 201921408418U CN 210371052 U CN210371052 U CN 210371052U
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Abstract
The utility model relates to the technical field of experimental devices, in particular to a constant-speed constant-pressure pump device, which comprises a double pump body, a servo driving mechanism for driving the double pump body to act, a PLC host computer connected with the double pump body, a pressure sensor and a position sensor, wherein the PLC host computer is connected with a touch display screen; the double pump bodies comprise a base, a box body arranged on the base, and a first pump body and a second pump body which are arranged in the box body side by side at the left and right and have the same structure; the utility model adopts a double-pump structure, which can be mutually matched and replaced, thereby ensuring continuous liquid supply; the mode of combining the PLC and the touch screen is adopted, the operation is simple, and the action of the pump can be visually observed; the ceramic plunger is adopted, so that the ceramic plunger has the characteristics of super corrosion resistance, wear resistance and the like; meanwhile, the constant-speed and constant-pressure pump device can automatically detect pressure and flow signals in the cylinder and has a pressure protection function; in addition, the constant-speed and constant-pressure pump device is high in precision, small in size, stable, reliable, high in automation degree and convenient to carry.
Description
Technical Field
The utility model relates to an experimental apparatus technical field especially relates to a constant speed constant pressure pump device.
Background
At present, the development history of the metering pump is not very long, and the domestic market of China is shorter, so the technical level of the metering pump in China is not high, display devices of the metering pump are not visual, the metering precision is low, the error is large, and the accurate metering result is difficult to ensure. Metering pumps are widely applied in various industries, the traditional metering pump at present cannot meet the higher requirements of people on high precision and stability, and most of the petrochemical industry fields in China generally adopt foreign equipment, so that the price is generally high, and the later maintenance is troublesome; in the past, a plurality of metering pumps generally determine the flow discharged by the pump in unit time by regulating the stroke of a lead screw through a hand wheel, the whole process is basically completed manually, and the whole process is gradually automated at present, but is not completely combined with modern control technologies such as a sensor technology and a communication technology. An important characteristic of the metering pump is high precision requirement, but the defects of many metering pumps in the domestic market at present are lower precision, and the general precision is 0.02 ml/min; the choice of material is an important factor, and there are higher demands on the material of the part of the metering pump directly contacting the liquid, and the material must ensure better corrosion resistance, wear resistance and higher hardness; the metering pumps in China are generally large in size and inconvenient to carry; if our country focuses more on these details in the manufacturing industry, the technical level will be in slow contact with the world.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the shortcoming that exists among the prior art, and the constant speed constant pressure pump device that proposes, its precision is high, and is small, reliable and stable, and degree of automation is high, and is wear-resisting, corrosion-resistant, easy operation, convenient to carry.
In order to achieve the above purpose, the utility model adopts the following technical scheme: a constant-speed and constant-pressure pump device comprises double pump bodies, a servo driving mechanism for driving the double pump bodies to act, a PLC host, a pressure sensor and a position sensor, wherein the PLC host is connected with the double pump bodies and is connected with a touch display screen; the double-pump body comprises a base, a box body arranged on the base, and a first pump body and a second pump body which are arranged in the box body in parallel at the left and right and have the same structure, wherein the first pump body and the second pump body are connected through a pneumatic valve joint; the first pump body comprises a cylinder body and a plunger arranged in the cylinder body, the side part of the cylinder body is connected with an inlet valve, and the top part of the cylinder body is connected with an outlet valve; the bottom of the cylinder body is sequentially connected with an upper righting rod, a middle righting rod and a plurality of righting rods, the upper righting rod and the middle righting rod are sequentially sleeved at the top ends of the righting rods, and the bottom ends of the righting rods are connected with the cavity of the speed reducer.
Preferably, the servo driving mechanism comprises a servo motor and a speed reducer, the speed reducer is connected with a worm arranged in a cavity of the speed reducer, the worm is connected with a worm wheel, the worm wheel is connected with a ball screw, and the ball screw penetrates through the middle centralizer and the upper centralizer to be connected with the bottom end of the plunger.
Preferably, the ball screw is sleeved with a gland, and a plane bearing and a connecting sleeve are arranged below the gland; a deep groove ball bearing and a supporting cylinder are arranged below the connecting sleeve, and a check ring for holes is arranged between the connecting sleeve and the deep groove ball bearing; the bottom end of the ball screw is connected with the speed reducer cavity through the end cover.
Preferably, the plunger is ceramic plunger, four righting rods are rectangular in distribution.
Preferably, a first tetrafluoro retaining ring is arranged between the outlet valve and the cylinder body, and a second tetrafluoro retaining ring is arranged between the bottom end of the cylinder body and the plunger.
Preferably, a gasket is arranged between the ball screw and the plunger.
The utility model discloses following beneficial effect has: the utility model adopts a double-pump structure, which can be mutually matched and replaced, thereby ensuring continuous liquid supply; the mode of combining the PLC and the touch screen is adopted, the operation is simple, and the action of the pump can be visually observed; the ceramic plunger is adopted, so that the ceramic plunger has the characteristics of super corrosion resistance, wear resistance and the like; meanwhile, the constant-speed and constant-pressure pump device can automatically detect pressure and flow signals in the cylinder and has a pressure protection function; in addition, the constant-speed and constant-pressure pump device has the advantages of high precision, small volume, stability, reliability, high automation degree and convenience in carrying, can be widely applied to the fields of metering, petroleum, chemical engineering and the like to complete fluid displacement and metering control, pressurizes liquid in scientific research tests, tests liquid discharge and pressure, and meets the rail with the foreign metering pump market as much as possible.
Drawings
Fig. 1 is a schematic diagram of the overall block of the present invention.
Fig. 2 is the overall structure schematic diagram of the middle double pump body of the present invention.
Fig. 3 is an explosion diagram of the double pump body of the present invention.
Fig. 4 is a side view of the double pump body of the present invention.
Fig. 5 is a sectional view taken along line a-a of fig. 4.
Fig. 6 is a partial schematic view of the servo driving mechanism of the present invention.
Fig. 7 is a schematic view of the working principle and the flow of the present invention.
In the figure: the device comprises 1 double pump bodies, 2 servo driving mechanisms, 3 PLC hosts, 4 pressure sensors, 4 position sensors, 5 position sensors, 6 touch display screens, 7 bases, 8 boxes, 9 first pump bodies, 10 second pump bodies, 11 pneumatic valve joints, 12 cylinders, 13 plungers, 14 inlet valves, 15 outlet valves, 16 upper centralizers, 17 middle centralizers, 18 centralizers, 19 reducer cavities, 20 servo motors, 21 reducers, 22 worms, 23 worm gears, 24 ball screws, 25 gland covers, 26 plane bearings, 27 connecting sleeves, 28 deep groove ball bearings, 29 supporting cylinders, 30-hole check rings, 31 end covers, 32 first tetrafluoro check rings, 33 second tetrafluoro check rings and 34 gaskets.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
Referring to fig. 1-7, a constant-speed constant-pressure pump device comprises a double pump body 1, a servo driving mechanism 2 for driving the double pump body 1 to act, a PLC host 3 connected with the double pump body 1, a pressure sensor 4 and a position sensor 5, wherein the PLC host 3 is connected with a touch display screen 6; the double-pump body 1 comprises a base 7, a box body 8 arranged on the base 7, and a first pump body 9 and a second pump body 10 which are arranged in the box body 8 in parallel at the left and right and have the same structure, wherein the first pump body 9 and the second pump body 10 are connected through a pneumatic valve joint 11; the first pump body 9 comprises a cylinder 12 and a plunger 13 arranged in the cylinder 12, wherein the side part of the cylinder 12 is connected with an inlet valve 14, and the top part of the cylinder 12 is connected with an outlet valve 15; the bottom of the cylinder body 12 is sequentially connected with an upper righting 16, a middle righting 17 and a plurality of righting rods 18, the upper righting 16 and the middle righting 17 are sequentially sleeved at the top ends of the righting rods 18, and the bottom ends of the righting rods 18 are connected with a speed reducer cavity 19.
The servo driving mechanism 2 comprises a servo motor 20 and a speed reducer 21, the speed reducer 21 is connected with a worm 22 installed in a cavity 19 of the speed reducer, the worm 22 is connected with a worm wheel 23, the worm wheel 23 is connected with a ball screw 24, and the ball screw 24 penetrates through a middle centralizer 17 and an upper centralizer 16 to be connected with the bottom end of the plunger 13.
Wherein, the plunger 13 is ceramic plunger, and four righting rods 18 are distributed in a rectangular shape.
In the embodiment, a servo motor 20 is adopted for driving, a worm wheel 23 and a worm 22 are driven through a speed reducer 21, the rotary motion of a ball screw 24 is converted into the linear motion of the screw, and a ceramic plunger is pushed to complete liquid suction and liquid discharge; the high-precision and high-safety digital control of the pump body is realized through the PLC host 3, and various working modes can be preset for the PLC host to adapt to various working conditions. The pressure sensor 4 monitors the working pressure, and when the working pressure exceeds a certain pressure value, an alarm signal appears; the position sensor 5 also carries out position detection, the topmost end and the bottommost end of the stroke are respectively provided with the position sensor, and when the plunger 13 moves to two limit positions, an alarm signal can be given; the touch display screen 6 can simulate the action of the pump, so that the action of the pump can be observed and controlled at any time, and the operation is visual and convenient. Meanwhile, the ceramic plunger is adopted, so that the hardness is high, the smoothness is high, and the ceramic plunger has the advantages of corrosion resistance, wear resistance and the like.
In addition, the pneumatic valve joint 11 is used for connecting pneumatic valves of the first pump body 9 and the second pump body 10, so that the connection action of the two pump bodies is ensured; the upper centering guide 16 is used for fixing the cylinder 12, the middle centering guide 17 is used for fixing the ceramic plunger and the ball screw 24 in cooperation with a flange; a ball screw 24 that converts the rotational movement of the screw nut into linear movement of the screw lever; each pump body adopts four centralizing rods, and the two pump bodies adopt eight centralizing rods in total and are used for connecting and supporting the whole pump body device; the servo motor 20, the speed reducer 21, the worm 22 and the worm wheel 23 form a transmission structure of the whole pump body device; the base 7 is used to support all the parts above it.
Specifically, a gland 25 is sleeved on the ball screw 24, and a plane bearing 26 and a connecting sleeve 27 are arranged below the gland 25; a deep groove ball bearing 28 and a supporting cylinder 29 are arranged below the connecting sleeve 27, and a retainer ring 30 for holes is arranged between the connecting sleeve 27 and the deep groove ball bearing 28; the bottom end of the ball screw 24 is connected with the reducer cavity 19 through the end cover 31.
In this embodiment, the flat bearing 26 is used to bear the axial load of the entire pump body device; the nipple 27 is used to support the flat bearing 26; the deep groove ball bearing 28 is used for bearing axial load and radial load; the retainer ring 30 for hole is used for supporting the deep groove ball bearing 28 in cooperation with the supporting cylinder 29.
Specifically, a first tetrafluoro retainer ring 32 is arranged between the outlet valve 15 and the cylinder 12, and a second tetrafluoro retainer ring 33 is arranged between the bottom end of the cylinder 12 and the plunger 13.
In this embodiment, the first tetrafluoro retainer ring 32 is adopted, so that the sealing property of the connection between the outlet valve 15 and the cylinder 12 is ensured; the second tetrafluoro retainer ring 33 is adopted to ensure the sealing performance between the cylinder 12 and the plunger 13.
Specifically, a washer 34 is provided between the ball screw 24 and the plunger 13.
In this embodiment, the washer 34 is used to reinforce the connection of the ceramic plunger to the ball screw.
Referring to fig. 7, the working principle of the present embodiment is as follows: the constant-speed constant-pressure pump device mainly has three operation modes, namely single-cylinder operation, double-cylinder parallel connection and double-cylinder series connection, and each mode has a constant-pressure and constant-flow working mode. The double-cylinder constant-speed constant-pressure pump is one of the advantages of the double-cylinder constant-speed constant-pressure pump, and can be switched among multiple working modes.
(1) The single-cylinder constant-pressure constant-speed pump is in a single-cylinder operation mode and comprises a valve, a motor, a piston, a lead screw, a controller and the like, and the single-cylinder constant-pressure constant-speed pump realizes the constant pressure and the constant speed by changing the rotating speed of the motor so as to change the flow of the single-cylinder constant-pressure constant-speed pump. In the constant pressure mode, when the pressure is overlarge, the piston is pushed downwards, the motor rotates anticlockwise, and the pressure is reduced; when the pressure is too small, the piston motor is pushed upwards to rotate along the clockwise direction, and the pressure in the cavity is increased. The outlet of the electromagnetic valve needs to be closed when liquid is fed every time, and the liquid suction valve is closed when the liquid flows out. Under the constant-current mode, the motor only needs to operate at a fixed speed, the flow speed can be ensured to be stable, closed-loop control can be used, and errors are reduced.
(2) In a double-cylinder parallel mode, 2 hydraulic cylinders are started, and constant-current (namely constant-speed) and constant-pressure control operation is realized on a load as required; the difference from (1) is that a larger flow than one hydraulic cylinder can be achieved.
(3) Double cylinder series mode, double cylinder series constant pressure mode: the two pumps are moved to the bottom, the two suction port valves are opened and the two outlet valves are closed when the two pumps are moved to the bottom, and the waiting time of about 10 seconds is needed when any one pump is moved to the bottom, so that liquid is fully sucked into the pumps, and then the suction port valves are closed to enter a preparation working state. If the first pump body starts first, the outlet valve of the first pump body is opened and the pump is fed, the pressure of the first pump body is tracked in real time by the second pump body, the pump is changed when the first pump body runs to the upper limit position, the outlet valve of the second pump body is opened, the outlet valve of the first pump body is closed, and the second pump body provides a power source with constant pressure. The first pump body retreats the pump, when pressure in the first pump body is reduced to zero, the inlet valve of the first pump body A is opened, the pump is retreated continuously (the speed of retreating the pump by the first pump body is larger than the speed of feeding the pump by the second pump body) for sucking liquid, the first pump body is stopped after retreating to the lower limit and waits for about 10 seconds, and then the suction port valve of the first pump body is closed. The first pump then begins to track the pressure of the second pump (to ensure that the second pump does not reach the upper limit when the process is completed). When the second pump body moves to a position away from the upper limit, the pump is changed, the process is the same as that of switching the first pump body to the second pump body, the circular pump changing state is achieved, and the purpose of constant-pressure continuous liquid discharging can be achieved. Double-cylinder series constant-current mode: if the first pump body is started first, the outlet valve of the first pump body is opened and the pump is fed, and the second pump body tracks the pressure of the first pump body in real time. When the first pump body runs to 10mm away from the upper limit, the pump is changed, the outlet valve of the second pump body is opened, the first pump body starts to decelerate, and the second pump body accelerates simultaneously. When the speed of the first pump body is zero, the second pump body reaches a set value, the outlet valve of the first pump body is closed, the first pump body retreats from the pump, and the suction valve of the first pump body is opened when the pressure of the first pump body is zero (the speed of retreating the pump of the first pump body is larger than the speed of advancing the pump of the second pump body). When the first pump is moved back to the lower limit, the pump is stopped, the first pump waits for 10 seconds to close the first pump suction valve, and then the first pump begins to track the second pump pressure (to ensure that the second pump does not reach the upper limit when the process is completed). When the second pump body runs to 10mm away from the upper limit, the pump is changed, and the process is the same as that of switching the first pump body to the second pump body. Thus, the pump is circularly changed, and the aim of continuously discharging liquid at a constant speed can be achieved.
In addition, the constant-speed constant-pressure pump device adopts a pulse-free design, a control panel of the constant-speed constant-pressure pump device is provided with a plurality of interfaces, an RS-232 interface and a plurality of interfaces, wherein the interfaces can be used for inputting and outputting analog pressure and analog flow rate and inputting digital signals; the controller is convenient to operate, has a one-key convenient function, and can be quickly started and closed to operate flow rate and pressure parameters and operate other functions; meanwhile, the controller is provided with a computer interface, and special programming and data downloading can be carried out through a computer when needed; and the controller is provided with a panel with four rows of digital display, and can conveniently carry out constant-current and constant-voltage operation programming.
In conclusion, the constant-speed constant-pressure pump device is mainly used for fluid displacement and metering control in the fields of metering, petroleum and chemical engineering, and is important equipment for metering, core analysis experiments and related research work; the intelligent liquid pressure meter is an intelligent instrument for providing high-precision fluid and pressure sources for scientific research and small-sized production devices, and is widely applied to occasions of pressurizing and discharging liquid, pressure test, pressure tracking and the like in test work of petroleum and scientific research units.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (6)
1. A constant-speed constant-pressure pump device comprises a double pump body (1) and a servo driving mechanism (2) for driving the double pump body (1) to act, and is characterized by further comprising a PLC host (3), a pressure sensor (4) and a position sensor (5) which are connected with the double pump body (1), wherein the PLC host (3) is connected with a touch display screen (6); the double-pump body (1) comprises a base (7), a box body (8) arranged on the base (7), and a first pump body (9) and a second pump body (10) which are arranged in the box body (8) side by side at the left and right and have the same structure, wherein the first pump body (9) and the second pump body (10) are connected through a pneumatic valve joint (11); the first pump body (9) comprises a cylinder body (12) and a plunger (13) arranged in the cylinder body (12), the side part of the cylinder body (12) is connected with an inlet valve (14), and the top part of the cylinder body (12) is connected with an outlet valve (15); the bottom of the cylinder body (12) is sequentially connected with an upper righting rod (16), a middle righting rod (17) and a plurality of righting rods (18), the upper righting rod (16) and the middle righting rod (17) are sequentially sleeved at the top ends of the righting rods (18), and the bottom ends of the righting rods (18) are connected with a speed reducer cavity (19).
2. A constant-speed constant-pressure pump device according to claim 1, characterized in that the servo drive (2) comprises a servo motor (20) and a reducer (21), the reducer (21) being connected to a worm (22) mounted in a reducer cavity (19), the worm (22) being connected to a worm wheel (23), the worm wheel (23) being connected to a ball screw (24), the ball screw (24) being connected to the bottom end of the plunger (13) through a central centralizer (17) and an upper centralizer (16).
3. A constant-speed constant-pressure pump device according to claim 2, characterized in that a gland (25) is sleeved on the ball screw (24), and a flat bearing (26) and a nipple (27) are arranged below the gland (25); a deep groove ball bearing (28) and a support cylinder (29) are arranged below the connecting sleeve (27), and a retainer ring (30) for holes is arranged between the connecting sleeve (27) and the deep groove ball bearing (28); the bottom end of the ball screw (24) is connected with the speed reducer cavity (19) through an end cover (31).
4. A constant-speed constant-pressure pump device according to claim 2, characterized in that the plungers (13) are ceramic plungers and the centering bars (18) are four and rectangular in shape.
5. A constant-speed constant-pressure pump device according to claim 1, characterized in that a first teflon collar (32) is provided between the outlet valve (15) and the cylinder (12), and a second teflon collar (33) is provided between the bottom end of the cylinder (12) and the plunger (13).
6. A constant-speed constant-pressure pump device according to claim 2, characterized in that a washer (34) is provided between the ball screw (24) and the plunger (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921408418.0U CN210371052U (en) | 2019-08-27 | 2019-08-27 | Constant-speed constant-pressure pump device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921408418.0U CN210371052U (en) | 2019-08-27 | 2019-08-27 | Constant-speed constant-pressure pump device |
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| CN210371052U true CN210371052U (en) | 2020-04-21 |
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| CN201921408418.0U Active CN210371052U (en) | 2019-08-27 | 2019-08-27 | Constant-speed constant-pressure pump device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110410290A (en) * | 2019-08-27 | 2019-11-05 | 江苏拓创科研仪器有限公司 | A kind of constant speed and constant pressure pump installation |
| CN111878368A (en) * | 2020-09-01 | 2020-11-03 | 卡川尔流体科技(上海)有限公司 | Intelligent control diaphragm pump |
| CN113357119A (en) * | 2021-07-19 | 2021-09-07 | 无锡易福高压清洗设备有限公司 | Single-cylinder crankshaft-free servo plunger pump and module thereof |
-
2019
- 2019-08-27 CN CN201921408418.0U patent/CN210371052U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110410290A (en) * | 2019-08-27 | 2019-11-05 | 江苏拓创科研仪器有限公司 | A kind of constant speed and constant pressure pump installation |
| CN111878368A (en) * | 2020-09-01 | 2020-11-03 | 卡川尔流体科技(上海)有限公司 | Intelligent control diaphragm pump |
| CN113357119A (en) * | 2021-07-19 | 2021-09-07 | 无锡易福高压清洗设备有限公司 | Single-cylinder crankshaft-free servo plunger pump and module thereof |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A constant speed and pressure pump device Effective date of registration: 20221209 Granted publication date: 20200421 Pledgee: Bank of China Limited by Share Ltd. Haian branch Pledgor: JIANGSU TOUCHUANG SCIENTIFIC RESEARCH INSTRUMENT Co.,Ltd. Registration number: Y2022980025876 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |