CN205620002U - High accuracy piston gas flow standard device - Google Patents
High accuracy piston gas flow standard device Download PDFInfo
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- CN205620002U CN205620002U CN201620129907.2U CN201620129907U CN205620002U CN 205620002 U CN205620002 U CN 205620002U CN 201620129907 U CN201620129907 U CN 201620129907U CN 205620002 U CN205620002 U CN 205620002U
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- piston
- gas flow
- high accuracy
- standard device
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Abstract
The utility model discloses a high accuracy piston gas flow standard device. The utility model discloses the well piston cylinder internal diameter that uses utilizes the grating chi to feed back to control system with piston displacement as measurement standard, realizes a closed loop measurement system, has installed pressure sensor and temperature sensor simultaneously and can carry out temperature pressure compensation to the system, is favorable to improving the examination precision of device, just the utility model discloses use the base as the benchmark, adjust servo motor and make it on same axis with linear guide and piston to avoided because its installation accuracy is high inadequately, and the piston life who appears reduces, device error increase scheduling problem.
Description
Technical field
This utility model relates to a kind of gas flow standard device, especially relates to a kind of high accuracy piston-type gas flow standard device.
Background technology
Suspended body flowmeter and the calibrating of soap film flowmeter at present, mainly being completed by bell-jar gas flow standard equipment and method of standard table gas flow standard device, the accuracy of its calibrating is the highest, poor reliability, especially when the calibrating of flowmeter for small flow, performance the most prominent.And the piston-type gas flow standard device occurred on market is electric-mechanic control system, processing quality of fit requires height, and the reason such as controller design difficulty is big, and the calibration accuracy of the most domestic piston-type gas flow standard device is the highest.
Summary of the invention
For the deficiency of background technology, the purpose of this utility model is to provide a kind of high accuracy piston-type gas flow standard device.
This utility model solves its technical problem and be the technical scheme is that
Servomotor in this utility model is fixed on the upper end steel plate of base by fixing lid through reductor, and described reductor is connected with ball screw one end by shaft coupling, and described ball screw end is by bearings, and bearing is fixed on the upper end steel plate of base；The described ball screw other end by being connected with piston rod inner, and the ball nut matched with ball screw fixing with on piston rod flange；Described piston rod flange is fixed with moving mass by screw, and described moving mass fixes with the line slideway being arranged on base；The scale grating of grating scale is attached to described base side, and the read head of grating scale is arranged on described moving mass side by fixed plate；The gripper shoe on rack-mount surface is fixed in the piston cylinder one end matched with described piston rod, the piston cylinder other end is connected with cylinder cap by screw, described pedestal lower end fixes support bar equipped with hoof foot, described base upper end steel plate and gripper shoe both sides by pipe fixed block；Cylinder cap bottom centre is connected by trachea and first electromagnetic valve one end, and the first electromagnetic valve other end is connected with one end of snap joint by trachea, and the other end of described snap joint is connected with gas flowmeter body by trachea；Cylinder cap bottom side is connected by gas inlet tube and second electromagnetic valve one end, and the other end of the second electromagnetic valve is connected with one end of gas inlet tube.
Furtherly, described piston cylinder uses stainless steel with piston rod.
Furtherly, described moving mass and base use No. 45 steel matter.
Furtherly, described piston cylinder outer wall is provided with support ring, and described support ring is fixed by screws on the bearing plate being installed in support.
Furtherly, described support side, by equipped with electronic box, is provided with data collecting card in described electronic box.
Furtherly, the upper end steel plate of described base and gripper shoe are designed with proximity switch.
Furtherly, pressure transducer and temperature sensor it are provided with bottom described cylinder cap.
Compared with background technology, the beneficial effects of the utility model are:
1. this utility model has that calibration accuracy is high, reliable and stable, the calibrating time is short and easy realizes the advantages such as detection automatization.
2. this utility model is on the basis of base, adjusts servomotor and is on same axis with line slideway and piston, thus avoids owing to its installation accuracy is not high enough, and the problems such as the piston reduction in service life occurred, directional error increase.
The most whole device, with piston cylinder internal diameter as measurement criteria, utilizes grating scale that piston displacement is fed back to control system, it is achieved a closed-loop measuring system.It is mounted with that pressure transducer and temperature sensor can carry out temperature pressure compensation to system simultaneously, is conducive to improving the calibration accuracy of device.
4. the outer wall of piston is provided with support ring, beneficially the even running of device, thus improves the calibration accuracy of device.
Accompanying drawing explanation
Fig. 1 is structural front view of the present utility model；
Fig. 2 is structural perspective of the present utility model；
In figure: 1, servomotor；2, proximity switch；3, ball screw；4, support bar；5, fixed plate；6, fixed block；7, piston cylinder；8, electronic box；9, support；10, temperature sensor；11, trachea；12, the first electromagnetic valve；13, gas flowmeter body；14, hoof foot；15, snap joint；16, gas inlet tube；17, the second electromagnetic valve；18, pressure transducer；19, cylinder cap；20, bearing plate；21, support ring；22, gripper shoe；23, piston rod；24, moving mass；25, ball nut；26, base；27, fixing lid；28, reductor；29, line slideway；30, grating scale.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described in further detail.
As depicted in figs. 1 and 2, servomotor 1 in this utility model is fixed on the upper end steel plate of base 26 by fixing lid 27 through reductor 28, described reductor 28 is connected with ball screw 3 one end by shaft coupling, described ball screw 3 end is by bearings, and bearing is fixed on the upper end steel plate of base 26；Described ball screw 3 other end is connected by internal with piston rod 23, and the ball nut 25 matched with ball screw 3 is fixed and on piston rod 23 flange；Described piston rod 23 flange is fixed with moving mass 24 by screw, and described moving mass 24 fixes with the line slideway 29 installed on base plate 26；The scale grating of grating scale 30 is attached to described base 26 side, and the read head of grating scale 30 is arranged on described moving mass 24 side by fixed plate 5；The gripper shoe 22 being arranged on support 9 upper surface is fixed in piston cylinder 7 one end matched with described piston rod 23, piston cylinder 7 other end is connected with cylinder cap 19 by screw, described support 9 lower end fixes support bar 4 with gripper shoe 22 both sides by pipe fixed block 6 equipped with hoof foot 14, described base 26 upper end steel plate；Cylinder cap 19 bottom centre is connected with first electromagnetic valve 12 one end by trachea 11, and first electromagnetic valve 12 other end is connected with one end of snap joint 15 by trachea 11, and the other end of described snap joint 15 is connected with gas flowmeter body 13 by trachea 11；Cylinder cap 19 bottom side is connected with second electromagnetic valve 17 one end by gas inlet tube 16, and the other end of the second electromagnetic valve 17 is connected with one end of gas inlet tube 16.
Described piston cylinder 7 uses stainless steel with piston rod 23, there is anticorrosive property, and can guarantee that under long operation conditions, piston cylinder 7 inwall is difficult to damaged, and described moving mass 24 uses No. 45 steel matter with base 26, its can cost-effective while, there is bigger deformation in prevent from being in operation moving mass 24 and base 26, thus ensure that the calibration accuracy of device because of stress.
Described piston cylinder 7 outer wall is provided with support ring 21, and described support ring 21 is fixed by screws on the bearing plate 20 being installed in support 9, it is achieved that the effect that piston rod can smoothly move up and down.
Described support 9 side, by equipped with electronic box 8, is provided with data collecting card in described electronic box 8.Control system is made up of with host computer slave computer, slave computer is data collecting card, slave computer controls the startup of servomotor, speed and stroke according to the instruction of host computer, and realize the Real-time Collection of signal to temperature sensor 10, pressure transducer 18, gas flowmeter body 13 and grating scale 30, and it is uploaded to host computer；Host computer is made up of personal computer, host computer real time record motor speed, piston position, temperature, pressure and other parameters, and can adjust the state of servomotor by controlling the setting of parameter.
The upper end steel plate of described base 26 and gripper shoe 22 are designed with proximity switch 2, and its cable is connected with slave computer, for controlling the ultimate range moved down on piston rod 23.
Pressure transducer 18 and temperature sensor 10 it is provided with bottom described cylinder cap.Its cable is connected with slave computer, is modified according to the deformation error that temperature and pressure are caused by thermal coefficient of expansion and the coefficient of elasticity of piston cylinder 7, by this method device is carried out temperature and pressure compensation.
Work process of the present utility model is as follows: the first electromagnetic valve 12 that PC control is connected with gas flowmeter body 13 is opened, and make the second electromagnetic valve 17 being connected with gas inlet tube 16 close, control servomotor 1 to rotate forward simultaneously, drive piston to move down with stabilized speed motion thus produce fluid source, flow through gas flowmeter body 13 through trachea 11.Using piston cylinder 7 as metered volume standard, the moving displacement of piston is fed back to host computer by grating scale 30, arrive Deng the calibrating time, synchronize to stop gathering signal and controlling servomotor 1 stopping operating, flow and the volume of standard can be calculated according to the effective internal diameter of piston cylinder 7, piston displacement, temperature parameter and pressure parameter, by the gas flow values of standard compared with the indicating value of gas flowmeter body, thus calculate the error of indication；After calibrating terminates, the first electromagnetic valve 12 that PC control is connected with gas flowmeter body 13 cuts out, and makes the second electromagnetic valve 17 being connected with gas inlet tube 16 open, and controls servomotor 1 simultaneously and inverts, drive and move on piston, make piston to maximum upper shifting distance.
The above; it it is only preferred embodiment of the present utility model; not this utility model is imposed any restrictions; every any simple modification, change and equivalent structure change made above example according to this utility model technical spirit, all still falls within the protection domain of technical solutions of the utility model.
Claims (7)
1. a high accuracy piston-type gas flow standard device, servomotor (1) is fixed on the upper end steel plate of base (26) by fixing lid (27) through reductor (28), described reductor (28) is connected with ball screw (3) one end by shaft coupling, described ball screw (3) end is by bearings, and bearing is fixed on the upper end steel plate of base (26)；Described ball screw (3) other end is connected by internal with piston rod (23), and the ball nut (25) matched with ball screw (3) fixing with on piston rod (23) flange；Described piston rod (23) flange is fixed with moving mass (24) by screw, and described moving mass (24) fixes with the line slideway (29) being arranged on base (26)；The scale grating of grating scale (30) is attached to described base (26) side, and the read head of grating scale (30) is arranged on described moving mass (24) side by fixed plate (5)；The gripper shoe (22) being arranged on support (9) upper surface is fixed in piston cylinder (7) one end matched with described piston rod (23), piston cylinder (7) other end is connected with cylinder cap (19) by screw, described support (9) lower end fixes support bar (4) with gripper shoe (22) both sides by pipe fixed block (6) equipped with hoof foot (14), described base (26) upper end steel plate；It is characterized in that: cylinder cap (19) bottom centre is connected with the first electromagnetic valve (12) one end by trachea (11), first electromagnetic valve (12) other end is connected with one end of snap joint (15) by trachea (11), and the other end of described snap joint (15) is connected with gas flowmeter body (13) by trachea (11)；Cylinder cap (19) bottom side is connected with the second electromagnetic valve (17) one end by gas inlet tube (16), and the other end of the second electromagnetic valve (17) is connected with one end of gas inlet tube (16).
A kind of high accuracy piston-type gas flow standard device the most according to claim 1, it is characterised in that: described piston cylinder (7) uses stainless steel with piston rod (23).
A kind of high accuracy piston-type gas flow standard device the most according to claim 1, it is characterised in that: described moving mass (24) and base (26) use No. 45 steel matter.
A kind of high accuracy piston-type gas flow standard device the most according to claim 1, it is characterized in that: described piston cylinder (7) outer wall is provided with support ring (21), and described support ring (21) is fixed by screws on the bearing plate (20) being installed in support (9).
A kind of high accuracy piston-type gas flow standard device the most according to claim 1, it is characterised in that: described support (9) side, by equipped with electronic box (8), is provided with data collecting card in described electronic box (8).
A kind of high accuracy piston-type gas flow standard device the most according to claim 1, it is characterised in that: the upper end steel plate of described base (26) and gripper shoe (22) are designed with proximity switch (2).
A kind of high accuracy piston-type gas flow standard device the most according to claim 1, it is characterised in that: described cylinder cap (19) bottom is provided with pressure transducer (18) and temperature sensor (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620129907.2U CN205620002U (en) | 2016-02-19 | 2016-02-19 | High accuracy piston gas flow standard device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620129907.2U CN205620002U (en) | 2016-02-19 | 2016-02-19 | High accuracy piston gas flow standard device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205620002U true CN205620002U (en) | 2016-10-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620129907.2U Expired - Fee Related CN205620002U (en) | 2016-02-19 | 2016-02-19 | High accuracy piston gas flow standard device |
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| CN (1) | CN205620002U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109387326A (en) * | 2018-12-10 | 2019-02-26 | 南京工程学院 | The fast tune servomechanism installation of air pressure in a kind of confined space |
| CN110068385A (en) * | 2019-04-16 | 2019-07-30 | 宜宾机电一体化研究所 | A kind of single cylinder piston gas flow standard device of high-end reference level |
| CN113504148A (en) * | 2021-07-06 | 2021-10-15 | 辽宁工程技术大学 | Device and method for measuring residual amount of coal bed gas |
-
2016
- 2016-02-19 CN CN201620129907.2U patent/CN205620002U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109387326A (en) * | 2018-12-10 | 2019-02-26 | 南京工程学院 | The fast tune servomechanism installation of air pressure in a kind of confined space |
| CN109387326B (en) * | 2018-12-10 | 2023-08-25 | 南京工程学院 | Quick-adjusting servo device for air pressure in closed space |
| CN110068385A (en) * | 2019-04-16 | 2019-07-30 | 宜宾机电一体化研究所 | A kind of single cylinder piston gas flow standard device of high-end reference level |
| CN110068385B (en) * | 2019-04-16 | 2024-05-07 | 宜宾机电一体化研究所 | Single-cylinder piston type gas flow standard device |
| CN113504148A (en) * | 2021-07-06 | 2021-10-15 | 辽宁工程技术大学 | Device and method for measuring residual amount of coal bed gas |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161005 Termination date: 20170219 |