CN110849256A - Real-time piston rod stroke detection device - Google Patents
Real-time piston rod stroke detection device Download PDFInfo
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- CN110849256A CN110849256A CN201911263284.2A CN201911263284A CN110849256A CN 110849256 A CN110849256 A CN 110849256A CN 201911263284 A CN201911263284 A CN 201911263284A CN 110849256 A CN110849256 A CN 110849256A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
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Abstract
The invention discloses a real-time detection device for the stroke of a piston rod, which is used for detecting the stroke of the piston rod of a reciprocating pump movement mechanism; the method comprises the following steps: the device comprises a data transmission device, an execution device and a control power supply; wherein: the data transmission device comprises a PC; a test program is installed in the PC; an execution device, comprising: the device comprises a mounting frame, a resettable linear displacement sensor and a motor; the mounting bracket includes: fixed bolster and moving platform. The real-time detection device for the piston rod stroke can simply and efficiently detect the real-time stroke of the piston rod of the reciprocating pump motion mechanism in reciprocating motion, and solves the problems that the manual operation efficiency is too low, the measurement result is not accurate, the random error of an operator is too large, the requirement on the quality of the operator is too high, and the like.
Description
Technical Field
The invention relates to the technical field of stroke detection of reciprocating pumps, in particular to a real-time piston rod stroke detection device.
Background
The reciprocating motion of the piston rod of the reciprocating pump motion mechanism is realized by a crank block, an eccentric cam or other similar reciprocating motion mechanisms. The stroke deviation of the piston rod of the reciprocating pump motion mechanism is generated by the superposition of machining errors and assembly errors of all relevant parts of a motion pair. Too great a stroke deviation will cause the actual flow rate of the reciprocating pump to exceed the rated flow rate. In particular, in a reciprocating pump motion mechanism in which the stroke itself is designed to be small, even if the stroke deviation is small, the flow rate is greatly affected. Therefore, a strict stroke deviation of the piston rod of the reciprocating pump motion mechanism is required.
However, in the current industry, stroke detection is not performed on an assembled crank-slider mechanism or other reciprocating mechanisms with similar functions, or a height gauge, a depth gauge or a gauge head is used for manual detection. The above operation tends to have the following drawbacks: the operation is complex and the efficiency is low. The deviation of the detection result is large, and particularly in a mechanism with the stroke allowing random adjustment, the initial position needs to be accurately adjusted and the adjustment scale needs to be marked for a product user. If the detection is not carried out or the detection is not accurate, the condition that the actual stroke length of the piston rod exceeds the deviation range allowed by the design can not be effectively controlled, the flow test is unqualified in a type experiment after the reciprocating pump is assembled, and the workload of reason analysis is increased.
Therefore, it is an urgent technical problem to be solved by those skilled in the art to provide a real-time piston rod stroke detection device of a reciprocating pump motion mechanism, which has accurate measurement result, simple measurement method and labor saving.
Disclosure of Invention
In view of the above, the invention provides a real-time piston rod stroke detection device, which can simply and efficiently detect the real-time stroke of a piston rod of a reciprocating pump motion mechanism in reciprocating motion, and solves the problems that manual operation efficiency is too low, measurement results are not accurate, random errors of operators are too large, and therefore, requirements on personnel quality are too high, and the like.
In order to achieve the purpose, the invention adopts the following technical scheme:
a real-time detection device for piston rod stroke is used for stroke detection of a piston rod of a reciprocating pump movement mechanism; the method comprises the following steps: the device comprises a data transmission device, an execution device and a control power supply; wherein:
the data transmission device comprises a PC; a test program is installed in the PC;
the execution device comprises: the device comprises a mounting frame, a position-resettable linear displacement sensor and a motor;
the mounting bracket includes: the device comprises a fixed support and a movable platform; the fixed bracket is vertically arranged; the movable platform is horizontally arranged and is positioned on one side of the fixed bracket; the moving platform is used for placing a reciprocating pump to be detected;
the resettable linear displacement sensor is fixedly arranged on the fixed support; the position resettable linear displacement sensor is electrically connected with the PC and the control power supply respectively;
the output shaft of the motor is fixedly connected with the driving input shaft of the reciprocating pump movement mechanism to be detected; the motor is electrically connected with the control power supply.
Has the advantages that: the execution device detects the stroke of the piston rod of the reciprocating pump movement mechanism in real time and transmits a detected stroke data signal to the data transmission device. The data transmission device processes the detected stroke data signals in real time, further obtains the stroke deviation data of the piston rod of the reciprocating pump movement mechanism, and judges whether the stroke deviation is within an allowable range.
The actuating device is simple in structure, and the resettable linear displacement sensor is fixedly arranged on the fixed support; placing a reciprocating pump to be detected on a movable platform of the mounting frame; the distance between the piston rod of the reciprocating pump movement mechanism and the probe of the resettable linear displacement sensor can be flexibly adjusted through the arrangement of the structure, the whole stroke of the piston rod is guaranteed to be in contact with the probe of the resettable linear displacement sensor, and therefore the measured stroke deviation data are accurate and reliable.
The testing program is installed in the PC of the data transmission device, real-time monitoring and data processing of stroke data of the piston rod of the reciprocating pump movement mechanism are achieved, data such as stroke deviation are finally obtained, the signal response speed is high, and the obtained data are accurate and effective.
Preferably, in the above real-time piston rod stroke detection device, the PC includes: the device comprises a signal receiving module, a signal conversion processing module, a signal output module and a display module; the signal receiving module is electrically connected with the position resettable linear displacement sensor; the signal conversion processing module is electrically connected with the signal receiving module, and a test program is installed in the signal receiving module; the signal conversion processing module is electrically connected with the signal output module; the signal output module is electrically connected with the display module.
Has the advantages that: the resettable linear displacement sensor detects the stroke of the piston rod of the reciprocating pump movement mechanism in real time to obtain a stroke data signal, and transmits the stroke data signal to the signal conversion processing module;
the signal conversion processing module is used for converting the received stroke data signal and transmitting the stroke deviation data signal after conversion processing to the signal output module;
the signal output module transmits the stroke deviation data signal to the display module;
and the display module displays the obtained travel data deviation data.
Preferably, in the above real-time piston rod stroke detection device, the test program may set a target stroke length and an allowable deviation; continuously calculating the amplitude of the resettable linear displacement sensor in each reciprocating period of the piston rod of the reciprocating pump moving mechanism; and data processing is performed to determine whether the stroke deviation of the piston rod of the reciprocating pump movement mechanism is within an allowable deviation range.
Has the advantages that: and converting the obtained stroke data signal through a test program. The difference between the maximum amplitude and the minimum amplitude of the resettable linear displacement sensor in each reciprocating period of the piston rod of the reciprocating pump motion mechanism is real-time stroke data of the piston rod of the reciprocating pump motion mechanism; then comparing the travel data with a target travel length to obtain travel deviation; and comparing the obtained actual travel deviation with the allowable deviation for calculation, and finally judging whether the actual travel deviation is within the allowable range.
The signal processing response speed is very high, the obtained data is accurate and effective, and the method has very beneficial technical effects.
Preferably, in the above real-time piston rod stroke detection device, when the stroke deviation exceeds the allowable range, an alarm display is performed.
Preferably, in the above real-time piston rod stroke detection device, the vertical height of the fixing bracket can be adjusted. Through the height adjustment of the fixed support, the probe of the resettable linear displacement sensor can be highly aligned with the end faces of the piston rods of the reciprocating pump motion mechanisms of different models, and the resettable linear displacement sensor is high in flexibility and adaptability.
Preferably, in the above real-time piston rod stroke detection device, the moving platform is a screw guide rail moving platform. The screw guide rail moving platform is simple in structure, the position of the reciprocating pump is convenient to adjust, and the screw guide rail moving platform has very beneficial technical effects.
Preferably, in the above real-time piston rod stroke detection device, the resettable linear displacement sensor is a self-resetting linear displacement sensor with the model number of TR-0010. The sensor has the advantages of long mechanical life, good shock resistance and temperature coefficient, and reliable operation in various environments.
Optionally, in the above real-time piston rod stroke detection device, the motor is a stepper motor.
The test program calculates the difference between the maximum value and the minimum value of all data transmitted by the resettable linear displacement sensor in each calculation period so as to reflect the real-time stroke length of the piston rod of the reciprocating pump movement mechanism. The reciprocating motion period of the piston rod is equal to or less than the calculation period of the test program by adjusting the rotating speed of the motor, so as to ensure that the maximum value and the minimum value must appear in each calculation period. Step motor is selected for use to this application, and starting motor has outstanding start-stop and reversal response, has further guaranteed the accurate effect of test data.
The invention discloses and provides a real-time detection device for piston rod stroke, which can simply and efficiently detect the real-time stroke of a piston rod of a reciprocating pump motion mechanism in reciprocating motion, and solves the problems that the manual operation efficiency is too low, the measurement result is not accurate, the random error of an operator is too large, the requirement on the quality of the operator is too high, and the like.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a working principle diagram of the present invention.
Wherein: 1 is a control power supply, 2 is a PC, 3 is a mounting rack, 31 is a fixed support, 32 is a mobile platform, 4 is a resettable linear displacement sensor, 5 is a motor, and 6 is a reciprocating pump.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The embodiment of the invention discloses a real-time detection device for piston rod stroke, which can simply and efficiently detect the real-time stroke of a piston rod of a reciprocating pump motion mechanism in reciprocating motion, and solves the problems that the manual operation efficiency is too low, the measurement result is not accurate, the random error of an operator is too large, the requirement on the quality of the operator is too high, and the like.
Referring to fig. 1, a real-time piston rod stroke detection device is used for detecting the stroke of a piston rod of a motion mechanism of a reciprocating pump 6; the method comprises the following steps: data transmission means, execution means and control power supply 1; wherein:
the data transmission device comprises a PC (personal computer) 2; a test program is installed in the PC 2;
an execution device, comprising: the device comprises a mounting frame 3, a resettable linear displacement sensor 4 and a motor 5;
the mounting frame 3 includes: a fixed bracket 31 and a moving platform 32; the fixed bracket 31 is vertically placed; the moving platform 32 is horizontally placed, and the moving platform 32 is positioned at one side of the fixed bracket 31; the movable platform 32 comprises a movable sliding table for placing the reciprocating pump 6 to be detected;
the resettable linear displacement sensor 4 is fixedly arranged on the fixed bracket 31; the resettable linear displacement sensor 4 is electrically connected with the PC 2 and the control power supply 1 respectively;
the output shaft of the motor 5 is fixedly connected with the driving input shaft of the motion mechanism of the reciprocating pump 6 to be detected; the motor 5 is electrically connected with the control power supply 1.
Preferably, in the above real-time piston rod stroke detection device, the PC 2 includes: the device comprises a signal receiving module, a signal conversion processing module, a signal output module and a display module; the signal receiving module is electrically connected with the position-resettable linear displacement sensor 4; the signal conversion processing module is electrically connected with the signal receiving module, and a test program is installed in the signal receiving module; the signal conversion processing module is electrically connected with the signal output module; the signal output module is electrically connected with the display module.
In order to further optimize the technical scheme, the test program can set a target stroke length and an allowable deviation; continuously calculating the amplitude of the resettable linear displacement sensor in each reciprocating period; the range of the resettable linear displacement sensor is set, the displacement of the resettable linear displacement sensor is recorded in real time, and whether the displacement of the resettable linear displacement sensor exceeds the range of the resettable linear displacement sensor is judged.
In order to further optimize the technical scheme, when the travel deviation exceeds the allowable range, alarm display is carried out.
In order to further optimize the above technical solution, the vertical height of the fixing bracket 31 can be adjusted.
In order to further optimize the above technical solution, the moving platform 32 is a lead screw guide moving platform.
In order to further optimize the technical scheme, the resettable linear displacement sensor 4 is a self-resetting linear displacement sensor with the model number of TR-0010.
In order to further optimize the above technical solution, the motor 5 is a stepper motor.
The working process is as follows:
① the resettable linear displacement sensor is fixed on the fixed bracket 31 and connected with the PC through a data line;
② placing the reciprocating pump 6 to be detected on the sliding table of the mobile platform 32, fixedly connecting the output shaft of the motor 5 with the driving input shaft of the reciprocating pump movement mechanism, electrically connecting the motor 5 with the control power supply 1, and adjusting the rotating speed and the rotating direction of the motor 5 through the control power supply 1;
③ adjusting the height of the fixed bracket 31 to make the center of the probe of the resettable linear displacement sensor 4 aligned with the center of the end face of the piston rod of the motion mechanism of the pump to be reciprocated;
④ PC 2 starts the test program, configures the parameters of stroke length and allowable deviation, and sets the resettable linear position sensor 4 to zero;
⑤ adjusting the sliding platform of the moving platform 32 to make the end face of the piston rod of the reciprocating pump moving mechanism contact with the probe of the resettable linear displacement sensor 4, starting the stepping motor, the piston rod of the reciprocating pump moving mechanism starts reciprocating motion, observing the contact condition between the probe of the resettable linear displacement sensor 4 and the end face of the piston rod of the reciprocating pump moving mechanism, and determining whether the piston rod and the probe are completely contacted in the full stroke by the continuous change of the indication value of the resettable linear displacement sensor 4 in the test program.
Meanwhile, the displacement of the resettable linear displacement sensor 4 does not exceed the measuring range of the piston rod of the reciprocating pump movement mechanism in the whole stroke.
⑥, the motor 5 is started again to complete the stroke detection of the piston rod of the reciprocating pump movement mechanism, obtain the stroke deviation and judge whether the stroke deviation is in the allowable value range.
If the stroke deviation exceeds the allowable value, the numerical value display area of the PC display module alarms out of tolerance by using colors or characters, at this time, the piston rod stroke adjusting device on the reciprocating pump moving mechanism is slowly adjusted, the actual stroke of the piston rod of the reciprocating pump moving mechanism is increased or reduced, the step ⑥ is repeated again to detect the stroke of the piston rod of the reciprocating pump moving mechanism until the stroke deviation is within the allowable range, the numerical value display area of the PC display module prompts to be qualified by using colors or characters, and after the stroke adjustment of the piston rod of the reciprocating pump moving mechanism is finished, the stroke locking device on the reciprocating pump moving mechanism is locked.
The working principle is as follows:
(1) the resettable linear displacement sensor 4 detects the stroke of the piston rod of the reciprocating pump movement mechanism in real time to obtain a stroke data signal, and transmits the stroke data signal to the signal conversion processing module;
(2) the signal conversion processing module is used for converting the received stroke data signal and transmitting the stroke deviation data signal after conversion processing to the signal output module;
(3) the signal output module transmits the stroke deviation data signal to the display module;
(4) and the display module displays the obtained travel data deviation data.
The real-time detection device for the stroke of the piston rod, disclosed by the invention, can simply and efficiently detect the real-time stroke of the piston rod of the reciprocating pump movement mechanism in reciprocating motion, and solves the problems that the manual operation efficiency is too low, the measurement result is not accurate, the random error of an operator is too large, the requirement on the quality of the operator is too high, and the like.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (8)
1. A real-time detection device for the stroke of a piston rod is used for detecting the stroke of the piston rod of a motion mechanism of a reciprocating pump (6); it is characterized by comprising: data transmission device, execution device and control power supply (1); wherein:
the data transmission device comprises a PC (2); a test program is installed in the PC (2);
the execution device comprises: the device comprises a mounting frame (3), a resettable linear displacement sensor (4) and a motor (5);
the mounting frame (3) comprises: a fixed support (31) and a mobile platform (32); the fixed bracket (31) is vertically arranged; the moving platform (32) is horizontally placed, and the moving platform (32) is positioned at one side of the fixed bracket (31); the moving platform (32) is used for placing the reciprocating pump (6);
the resettable linear displacement sensor (4) is fixedly arranged on the fixed bracket (31); the resettable linear displacement sensor (4) is electrically connected with the PC (2) and the control power supply (1) respectively;
the output shaft of the motor (5) is fixedly connected with the driving input shaft of the motion mechanism of the reciprocating pump (6); the motor (5) is electrically connected with the control power supply (1).
2. The piston rod stroke real-time detection device according to claim 1, wherein the PC (2) comprises: the device comprises a signal receiving module, a signal conversion processing module, a signal output module and a display module; the signal receiving module is electrically connected with the position resettable linear displacement sensor (4); the signal conversion processing module is electrically connected with the signal receiving module, and a test program is installed in the signal receiving module; the signal conversion processing module is electrically connected with the signal output module; the signal output module is electrically connected with the display module.
3. The piston rod stroke real-time detection device according to claim 1 or 2, wherein the test program can set a target stroke length and an allowable deviation; continuously calculating the amplitude of the resettable linear displacement sensor in each reciprocating period of the piston rod of the reciprocating pump moving mechanism; and data processing is performed to determine whether the stroke deviation of the piston rod of the reciprocating pump movement mechanism is within an allowable deviation range.
4. The real-time piston rod stroke detection device according to claim 3, wherein when the stroke deviation exceeds the allowable deviation range, an alarm display is performed.
5. A piston rod stroke real-time detection device according to claim 1, characterized in that the vertical height of the fixed bracket (31) is adjustable.
6. The piston rod stroke real-time detection device according to claim 1, wherein the moving platform (32) is a lead screw guide moving platform.
7. The piston rod stroke real-time detection device according to claim 1, wherein the resettable linear displacement sensor (4) is a self-resetting linear displacement sensor with the model number TR-0010.
8. A piston rod stroke real-time detection device according to claim 1, characterized in that the motor (5) is a stepper motor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911263284.2A CN110849256A (en) | 2019-12-11 | 2019-12-11 | Real-time piston rod stroke detection device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911263284.2A CN110849256A (en) | 2019-12-11 | 2019-12-11 | Real-time piston rod stroke detection device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111779666A (en) * | 2020-08-08 | 2020-10-16 | 博山水泵制造厂 | Position detection device of reciprocating pump |
| CN112985817A (en) * | 2021-03-26 | 2021-06-18 | 宁波威孚天力增压技术股份有限公司 | Vane angle adjustment method for VNT turbocharger detection |
| CN113740039A (en) * | 2020-05-14 | 2021-12-03 | 北京机械设备研究所 | Linear displacement testing device and method of piston rod type multi-degree-of-freedom executing mechanism |
| CN114858109A (en) * | 2022-05-06 | 2022-08-05 | 深圳市安保医疗科技股份有限公司 | Method, device, equipment and medium for detecting mechanical movement precision of workpiece to be detected |
-
2019
- 2019-12-11 CN CN201911263284.2A patent/CN110849256A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113740039A (en) * | 2020-05-14 | 2021-12-03 | 北京机械设备研究所 | Linear displacement testing device and method of piston rod type multi-degree-of-freedom executing mechanism |
| CN113740039B (en) * | 2020-05-14 | 2024-05-10 | 北京机械设备研究所 | Linear displacement testing device and method for piston rod type multi-degree-of-freedom actuating mechanism |
| CN111779666A (en) * | 2020-08-08 | 2020-10-16 | 博山水泵制造厂 | Position detection device of reciprocating pump |
| CN112985817A (en) * | 2021-03-26 | 2021-06-18 | 宁波威孚天力增压技术股份有限公司 | Vane angle adjustment method for VNT turbocharger detection |
| CN114858109A (en) * | 2022-05-06 | 2022-08-05 | 深圳市安保医疗科技股份有限公司 | Method, device, equipment and medium for detecting mechanical movement precision of workpiece to be detected |
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