CN216012342U - Constant-pressure working volume type liquid flow detection device - Google Patents
Constant-pressure working volume type liquid flow detection device Download PDFInfo
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- CN216012342U CN216012342U CN202122586174.9U CN202122586174U CN216012342U CN 216012342 U CN216012342 U CN 216012342U CN 202122586174 U CN202122586174 U CN 202122586174U CN 216012342 U CN216012342 U CN 216012342U
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Abstract
The utility model discloses a constant pressure working volume type liquid flow detection device, which comprises a shell, and a circuit board, a three-way pipe, a solenoid valve, an injector, a constant force spring, a photoelectric sensor I and a photoelectric sensor II which are arranged in the shell, wherein the injector comprises a needle cylinder and a piston core rod; the three-way pipe is respectively connected with the liquid inflow pipeline and the electromagnetic valve injector; one end of the constant force spring is connected with a piston core rod of the injector, and the other end of the constant force spring is fixedly connected with the shell; the first photoelectric sensor is arranged at the front part of the needle cylinder, and the second photoelectric sensor is arranged at the rear part of the needle cylinder; the utility model discloses according to the difference of the liquid operating condition pressure that awaits measuring, can select the constant force drive coil spring of different specifications, the area of experimental liquid is pressed and is measured, can satisfy the normal position measurement of operating pressure state liquid between bar.
Description
Technical Field
The utility model relates to a device that is used for inspection flow to relate to index in chromatograph examination belongs to chromatograph examination technical field.
Background
The present invention relates to a chromatograph, which is a device for chromatographic separation analysis, and comprises a sample introduction system, a detection system, a recording and data processing system, a temperature control system, a mobile phase control system, etc., the modern chromatograph has the characteristics of high stability, sensitivity, versatility, high automation degree, etc., and comprises a gas chromatograph, a liquid chromatograph, a gel chromatograph, etc., the chromatographs are widely used for analyzing certain contents of chemical products and high polymer materials, and the gel chromatograph can also measure the molecular weight and the distribution of the high polymer materials.
In chromatograph flow measurement, the liquid chromatograph calibration protocol specifies: the mass of the liquid is converted into volume through density conversion, and then divided by time to obtain flow rate, and the flow measured by the method is the average flow in a certain time, so that the liquid flow of the chromatograph can be measured through a volume tube.
SUMMERY OF THE UTILITY MODEL
Utility model purpose: in order to overcome the not enough of existence among the prior art, the utility model provides a but the positive displacement fluid flowmeter of constant voltage work just can realize piston pump liquid flow's constant voltage measurement's constant voltage positive displacement fluid flowmeter detection device.
The technical scheme is as follows: in order to achieve the above object, the utility model adopts the following technical scheme:
the utility model provides a constant voltage working volume formula liquid flow detection device, includes the casing to and set up circuit board, three-way pipe, solenoid valve, syringe, constant force spring, photoelectric sensor one, photoelectric sensor two in the casing, wherein:
the injector comprises a needle cylinder and a piston core rod, wherein a through hole is formed in the front end of the needle cylinder, and the piston core rod is arranged in the needle cylinder.
The three-way pipe is fixedly arranged in the shell, the liquid inlet end of the three-way pipe is connected with the liquid inflow pipeline, and the first liquid outlet end of the three-way pipe is connected with the liquid discharge pipeline through the electromagnetic valve. And the second liquid outlet end of the three-way pipe is fixedly connected with a through hole at the front end of the needle cylinder of the injector.
One end of the constant force spring is connected with a piston core rod of the injector, and the other end of the constant force spring is fixedly connected with the shell.
The first photoelectric sensor is arranged at the front part of the needle cylinder, and the second photoelectric sensor is arranged at the rear part of the needle cylinder.
The circuit board is respectively in communication connection with the first photoelectric sensor and the second photoelectric sensor.
Preferably: the shell is provided with a display screen, and the display screen is in communication connection with the circuit board.
Preferably: the shell is provided with a key switch, and the key switch is in communication connection with the circuit board.
Preferably: the shell is provided with a data output USB interface, and the data output USB interface is in communication connection with the circuit board.
Preferably: the power supply is in communication connection with the circuit board.
Preferably: the shell is provided with a piston observation window, and the needle cylinder is positioned in the view of the piston observation window.
Preferably: the constant force spring is a constant force driving coil spring, a spiral spring or a special-shaped spring.
Preferably: send into the mechanism including the centre gripping, the centre gripping is sent into the mechanism and is included horizontal migration subassembly, vertical migration subassembly, centre gripping subassembly, wherein:
the horizontal movement assembly comprises a first motor, a transverse rod, a first screw rod and a first screw rod seat, the first motor and the transverse rod are fixedly installed in the shell, the first screw rod is installed on the transverse rod through a bearing, the first screw rod seat is installed on the first screw rod, and the first screw rod seat is in threaded transmission connection with the first screw rod. The first motor is in driving connection with the first screw rod.
The vertical moving assembly comprises a second motor, a vertical rod, a second lead screw seat and a first mounting seat, the first mounting seat is mounted on the cross rod and is connected with the cross rod in a sliding mode, and meanwhile the first mounting seat is fixedly connected with the first lead screw seat. The vertical rod and the second motor are fixedly installed on the first installation seat, the second lead screw is installed on the vertical rod through a bearing, the second lead screw seat is installed on the second lead screw, and the second lead screw seat is in threaded transmission connection with the second lead screw. The second motor is in driving connection with the second screw rod.
The clamping assembly is fixedly mounted on the second screw rod seat and used for clamping the injector.
Preferably: the clamping assembly comprises a supporting seat and a fixing seat, the supporting seat is installed on the vertical rod and is connected with the vertical rod in a sliding mode, and the supporting seat is fixedly connected with the second screw rod seat. The supporting seat is provided with a limiting groove, an elastic pad is arranged below the limiting groove, and the fixing seat is installed above the limiting groove. The fixing base includes L type fixing base body, stationary blade, slide bar, buffer spring, the stationary blade is installed on L type fixing base body, just stationary blade and L type fixing base body (924) sliding connection, the one end fixed mounting of slide bar is on L type fixing base body (924), just the other end of slide bar passes the stationary blade, just stationary blade and slide bar sliding connection, buffer spring sets up on the slide bar, just buffer spring one end is connected with L type fixing base body (924), and the other end is connected with the stationary blade.
Preferably: the clamping component is an arc elastic piece with an opening at the side edge.
Compared with the prior art, the utility model, following beneficial effect has:
the utility model discloses according to the difference of the liquid operating condition pressure that awaits measuring, can select the constant force drive coil spring of different specifications, the area of experimental liquid is pressed and is measured, can satisfy the normal position measurement of operating pressure state liquid between (10 ~ 400) bar.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic diagram of a display structure of the housing.
FIG. 3 is a schematic view of the structure of the clamping and feeding mechanism.
Detailed Description
The invention will be further elucidated with reference to the drawings and specific embodiments, it being understood that these examples are intended to illustrate the invention only and are not intended to limit the scope of the invention, and that modifications to the various equivalent forms of the invention, which may occur to those skilled in the art after reading the present invention, fall within the scope of the invention as defined in the claims appended hereto.
The utility model provides a constant voltage work positive displacement liquid flow detection device, as shown in fig. 1 and 2, includes the casing to and set up circuit board 1, three-way pipe 2, solenoid valve 3, syringe 4, constant force spring 5, photoelectric sensor 61, photoelectric sensor 62 in the casing, wherein:
the injector 4 comprises a needle cylinder and a piston core rod, wherein a through hole is formed in the front end of the needle cylinder, and the piston core rod is arranged in the needle cylinder.
The three-way pipe 2 is fixedly arranged in the shell, the liquid inlet end 21 of the three-way pipe 2 is connected with a liquid inflow pipeline, and the first liquid outlet end 22 of the three-way pipe 2 is connected with a liquid discharge pipeline through the electromagnetic valve 3. And the second liquid outlet end 23 of the three-way pipe 2 is fixedly connected with the front end through hole of the needle cylinder of the injector 4.
One end of the constant force spring 5 is connected with the piston core rod of the injector 4, and the other end of the constant force spring 5 is fixedly connected with the shell.
The first photoelectric sensor 61 is arranged at the front part of the syringe, and the second photoelectric sensor 62 is arranged at the rear part of the syringe.
The circuit board 1 is in communication connection with the first photoelectric sensor 61 and the second photoelectric sensor 62 respectively.
The shell is provided with a display screen 11, a key switch 12, a data output USB interface 13 and a piston observation window 14, the display screen 11, the key switch 12 and the data output USB interface 13 are in communication connection with the circuit board 1, and the needle cylinder is located in the visual field of the piston observation window 14. The power supply 15 is electrically connected to the circuit board 1.
The constant force spring 5 is a constant force driving coil spring, a spiral spring or a special-shaped spring.
The clamping and feeding mechanism in the embodiment comprises a horizontal moving assembly 7, a vertical moving assembly 8 and a clamping assembly 9, wherein:
the horizontal moving assembly 7 comprises a first motor 71, a cross rod 72, a first screw rod 73 and a first screw rod seat 74, wherein the first motor 71 and the cross rod 72 are fixedly installed in the shell, the first screw rod 73 is installed on the cross rod 72 through a bearing, the first screw rod seat 74 is installed on the first screw rod 73, and the first screw rod seat 74 is in threaded transmission connection with the first screw rod 73. The first motor 71 is in driving connection with a first lead screw 73.
The vertical moving assembly 8 comprises a second motor 81, a vertical rod 82, a second screw rod 83, a second screw rod seat 84 and a first mounting seat 85, the first mounting seat 85 is mounted on the cross rod 72, the first mounting seat 85 is slidably connected with the cross rod 72, and meanwhile, the first mounting seat 85 is fixedly connected with the first screw rod seat 74. The vertical rod 82 and the second motor 81 are fixedly mounted on the first mounting base 85, the second lead screw 83 is mounted on the vertical rod 82 through a bearing, the second lead screw base 84 is mounted on the second lead screw 83, and the second lead screw base 84 is in threaded transmission connection with the second lead screw 83. The second motor 81 is in driving connection with a second lead screw 83.
The clamping assembly 9 is fixedly mounted on the second screw boss 84, and the clamping assembly 9 is used for clamping the syringe 4.
During the use, through 9 centre gripping syringes 4 of centre gripping subassembly, then carry out horizontal migration to syringe 4 through horizontal migration subassembly 7, carry out vertical movement to syringe 4 through vertical migration subassembly 8, when moving, earlier move toward the direction of constant force spring 5, compress constant force spring 5, then move the front end of syringe 4 toward the second play liquid end 23 of three-way pipe 2, carry out fixed connection with the front end through-hole of syringe 4 and the second play liquid end 23 of three-way pipe 2, should guarantee that constant force spring 5 exerts the prestressing force at syringe 4 this moment. When water is fed to the syringe 4, the plunger rod is pushed outwards, under the action of the constant force spring 5. At this point, the liquid was continued to be introduced. Timing is initiated when the injection rod passes the first photosensor 61. The timing is finished when the injection rod passes through the second photoelectric sensor 62, and the time t is recorded. At the same time, the solenoid valve opens and the liquid is pushed out of the syringe under the action of the constant force drive coil spring. And obtaining the flow rate of the liquid to be measured and recording as F ═ V/T.
The clamping assembly 9 comprises a supporting seat 91 and a fixing seat 92, the supporting seat 91 is mounted on the vertical rod 82, the supporting seat 91 is connected with the vertical rod 82 in a sliding mode, and the supporting seat 91 is fixedly connected with the second screw rod seat 84. Be provided with spacing groove 911 on the supporting seat 91, be provided with the cushion below the spacing groove 911, fixing base 92 is installed on spacing groove 911. Fixing base 92 includes L type fixing base body 924, fixing sheet 921, slide bar 922, buffer spring 923, fixing sheet 921 is installed on L type fixing base body, just fixing sheet 921 and L type fixing base body 924 sliding connection, the one end fixed mounting of slide bar 922 is on L type fixing base body 924, just the other end of slide bar 922 passes fixing sheet 921, just fixing sheet 921 and slide bar 922 sliding connection, buffer spring 923 sets up on slide bar 922, just buffer spring 923 one end is connected with L type fixing base body 924, and the other end is connected with fixing sheet 921.
In another embodiment of the present invention: the clamping component 9 is an arc-shaped elastic piece with an opening at the side edge.
Specification:
dosing tube (syringe): volume between two photoelectric sensors is V
Specification of constant force drive coil spring: (1 to 10) N
The working principle is as follows:
1. closing of solenoid valve
2. The liquid to be measured with unknown flow enters the quantitative pipe through the tee joint, the quantitative pipe begins to be filled with the liquid and pushes the injection rod to move downwards 3, when the injection rod passes through the first photoelectric sensor, timing is started,
4. the timing is ended when the injection rod passes the second photosensor and the time t is recorded. And simultaneously, opening the electromagnetic valve, and 5, pushing the liquid out of the precision injector under the action of the constant-force driving coil spring.
6. The flow of the liquid to be measured is recorded as F ═ V/T
The utility model discloses can be according to the difference of the liquid operating condition pressure that awaits measuring, can select the constant force drive coil spring of different specifications, the area of experimental liquid is pressed and is measured, can satisfy the normal position measurement of operating pressure state liquid between (10 ~ 400) bar. The detection volume is (50-1000) mu L, the detection work of the liquid flow can be completed within 60s, the detection result precision is high, and the repeatability is good. The constant force driving coil spring and the quantitative tube are convenient to disassemble, and the flow parameter measurement of liquid with the working pressure of 10-400 bar and the flow speed range of 0.002 ml/min-10 ml/min can be realized.
The above description is only a preferred embodiment of the present invention, and it should be noted that: for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be considered as the protection scope of the present invention.
Claims (10)
1. The utility model provides a constant voltage work positive displacement liquid flow detection device which characterized in that: including the casing to and set up circuit board (1), three-way pipe (2), solenoid valve (3), syringe (4), constant force spring (5), photoelectric sensor (61), photoelectric sensor two (62) in the casing, wherein:
the injector (4) comprises a needle cylinder and a piston core rod, wherein the front end of the needle cylinder is provided with a through hole, and the piston core rod is arranged in the needle cylinder;
the three-way pipe (2) is fixedly arranged in the shell, a liquid inlet end (21) of the three-way pipe (2) is connected with a liquid inflow pipeline, and a first liquid outlet end (22) of the three-way pipe (2) is connected with a liquid discharge pipeline through an electromagnetic valve (3); the second liquid outlet end (23) of the three-way pipe (2) is fixedly connected with a through hole at the front end of the needle cylinder of the injector (4);
one end of the constant force spring (5) is connected with a piston core rod of the injector (4), and the other end of the constant force spring (5) is fixedly connected with the shell;
the first photoelectric sensor (61) is arranged at the front part of the needle cylinder, and the second photoelectric sensor (62) is arranged at the rear part of the needle cylinder;
the circuit board (1) is in communication connection with the first photoelectric sensor (61) and the second photoelectric sensor (62) respectively.
2. The constant-pressure positive-displacement liquid flow rate detecting device according to claim 1, wherein: the display screen (11) is arranged on the shell, and the display screen (11) is in communication connection with the circuit board (1).
3. The constant-pressure positive-displacement liquid flow rate detecting device according to claim 2, wherein: the shell is provided with a key switch (12), and the key switch (12) is in communication connection with the circuit board (1).
4. The constant-pressure positive-displacement liquid flow rate detecting device according to claim 3, wherein: the shell is provided with a data output USB interface (13), and the data output USB interface (13) is in communication connection with the circuit board (1).
5. The constant-pressure positive-displacement liquid flow rate detecting device according to claim 4, wherein: the power supply (15) is included, and the power supply (15) is electrically connected with the circuit board (1).
6. The constant-pressure positive-displacement liquid flow rate detecting device according to claim 5, wherein: the shell is provided with a piston observation window (14), and the needle cylinder is positioned in the visual field of the piston observation window (14).
7. The constant-pressure positive-displacement liquid flow rate detecting device according to claim 6, wherein: the constant force spring (5) is a constant force driving coil spring, a spiral spring or a special-shaped spring.
8. The constant-pressure positive-displacement liquid flow rate detecting device according to claim 7, wherein: comprises a clamping and feeding mechanism which is used for clamping and feeding the workpiece,
the clamping and feeding mechanism comprises a horizontal moving assembly (7), a vertical moving assembly (8) and a clamping assembly (9), wherein:
the horizontal moving assembly (7) comprises a first motor (71), a cross rod (72), a first screw rod (73) and a first screw rod seat (74), the first motor (71) and the cross rod (72) are fixedly installed in the shell, the first screw rod (73) is installed on the cross rod (72) through a bearing, the first screw rod seat (74) is installed on the first screw rod (73), and the first screw rod seat (74) is in threaded transmission connection with the first screw rod (73); the first motor (71) is in driving connection with the first screw rod (73);
the vertical moving assembly (8) comprises a second motor (81), a vertical rod (82), a second screw rod (83), a second screw rod seat (84) and a first mounting seat (85), the first mounting seat (85) is mounted on the cross rod (72), the first mounting seat (85) is connected with the cross rod (72) in a sliding mode, and meanwhile the first mounting seat (85) is fixedly connected with the first screw rod seat (74); the vertical rod (82) and the second motor (81) are fixedly installed on the first installation base (85), the second screw rod (83) is installed on the vertical rod (82) through a bearing, the second screw rod base (84) is installed on the second screw rod (83), and the second screw rod base (84) is in threaded transmission connection with the second screw rod (83); the second motor (81) is in driving connection with the second screw rod (83);
the clamping assembly (9) is fixedly arranged on the second screw rod seat (84), and the clamping assembly (9) is used for clamping the injector (4).
9. The constant-pressure positive-displacement liquid flow rate detecting device according to claim 8, wherein: the clamping assembly (9) comprises a supporting seat (91) and a fixed seat (92), the supporting seat (91) is installed on the vertical rod (82), the supporting seat (91) is connected with the vertical rod (82) in a sliding mode, and the supporting seat (91) is fixedly connected with the second screw rod seat (84); a limiting groove (911) is formed in the supporting seat (91), an elastic cushion is arranged below the limiting groove (911), and the fixing seat (92) is installed above the limiting groove (911); fixing base (92) include L type fixing base body (924), stationary blade (921), slide bar (922), buffer spring (923), stationary blade (921) is installed on L type fixing base body, just stationary blade (921) and L type fixing base body (924) sliding connection, the one end fixed mounting of slide bar (922) is on L type fixing base body (924), just fixed blade (921) is passed to the other end of slide bar (922), just stationary blade (921) and slide bar (922) sliding connection, buffer spring (923) set up on slide bar (922), just buffer spring (923) one end is connected with L type fixing base body (924), and the other end is connected with stationary blade (921).
10. The constant-pressure positive-displacement liquid flow rate detecting device according to claim 8, wherein: the clamping component (9) is an arc-shaped elastic piece with an opening at the side edge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122586174.9U CN216012342U (en) | 2021-10-26 | 2021-10-26 | Constant-pressure working volume type liquid flow detection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122586174.9U CN216012342U (en) | 2021-10-26 | 2021-10-26 | Constant-pressure working volume type liquid flow detection device |
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| Publication Number | Publication Date |
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| CN216012342U true CN216012342U (en) | 2022-03-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202122586174.9U Active CN216012342U (en) | 2021-10-26 | 2021-10-26 | Constant-pressure working volume type liquid flow detection device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114487213A (en) * | 2022-04-15 | 2022-05-13 | 南京派诺思科学仪器有限公司 | Volumetric liquid chromatograph flow measuring device and method |
| CN117191142A (en) * | 2023-11-08 | 2023-12-08 | 国网辽宁省电力有限公司 | Flow measuring device of positive displacement liquid chromatograph |
-
2021
- 2021-10-26 CN CN202122586174.9U patent/CN216012342U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114487213A (en) * | 2022-04-15 | 2022-05-13 | 南京派诺思科学仪器有限公司 | Volumetric liquid chromatograph flow measuring device and method |
| CN114487213B (en) * | 2022-04-15 | 2022-09-02 | 南京派诺思科学仪器有限公司 | Volumetric liquid chromatograph flow measuring device and method |
| CN117191142A (en) * | 2023-11-08 | 2023-12-08 | 国网辽宁省电力有限公司 | Flow measuring device of positive displacement liquid chromatograph |
| CN117191142B (en) * | 2023-11-08 | 2024-01-30 | 国网辽宁省电力有限公司 | Flow measuring device of positive displacement liquid chromatograph |
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