CN109752133A - A kind of high-precision pneumatic pressure transmitter - Google Patents
A kind of high-precision pneumatic pressure transmitter Download PDFInfo
- Publication number
- CN109752133A CN109752133A CN201910223629.5A CN201910223629A CN109752133A CN 109752133 A CN109752133 A CN 109752133A CN 201910223629 A CN201910223629 A CN 201910223629A CN 109752133 A CN109752133 A CN 109752133A
- Authority
- CN
- China
- Prior art keywords
- pressure transmitter
- connecting column
- connect
- bourdon tube
- pneumatic pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000007789 sealing Methods 0.000 claims description 7
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 239000007789 gas Substances 0.000 description 6
- 229920002545 silicone oil Polymers 0.000 description 6
- 238000003466 welding Methods 0.000 description 6
- 238000009434 installation Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 229910052786 argon Inorganic materials 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- TVEXGJYMHHTVKP-UHFFFAOYSA-N 6-oxabicyclo[3.2.1]oct-3-en-7-one Chemical compound C1C2C(=O)OC1C=CC2 TVEXGJYMHHTVKP-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009530 blood pressure measurement Methods 0.000 description 1
- 230000005587 bubbling Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 210000005239 tubule Anatomy 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Measuring Fluid Pressure (AREA)
Abstract
The present invention provides a kind of high-precision pneumatic pressure transmitter, including measuring unit and converting unit；The measuring unit includes bellows flange, and bellows flange top connects connecting column, offers the through-hole passed through for pressure transmitting medium in the connecting column；The converting unit includes Bourdon tube, main shaft, nozzle flapper and relay, and described Bourdon tube one end is connect with the connecting column, and the Bourdon tube is communicated with the through-hole；The other end of the Bourdon tube is connect with one end of the main shaft, and the other end of the main shaft is connect with one end of the nozzle flapper, and the other end of the nozzle flapper is connect with the relay.The present invention has the advantages that with high accuracy and more convenient when assembling pressure transmitter, produces the more efficient of pressure transmitter.
Description
Technical field
The present invention relates to pressure transmitter device technical fields, and in particular to a kind of high-precision pneumatic pressure transmitter, mainly
Applied to the pneumatic pressure-retaining system of shield machine.
Background technique
Shield excavation machine be integrate light, mechanical, electrical, liquid, sensing, information technology pass through under the protection of steel body shell
The special engineering that the knife cutting soil body carries out subterranean tunnel driving is mechanical, with speed of application is fast, safety is good, surface subsidence is small
The advantages that, the Tunnel Engineering such as subway, railway, highway, municipal administration, water power are had been widely used at present.Shield machine is in the construction process
It keeps the stabilization of face especially important, if unstable phenomenon occurs in face, just will appear landslide or area is burst in bubbling
The danger such as face.Pressure-retaining system is one of shield machine main composition system, and pressure transmitter is vital one in pressure-retaining system
Ring plays pressure in real-time monitoring cabin and is converted into the function that standard signal (20-100KPa) feeds back to control system.Tradition meaning
The pressure transmitter of justice is the capillary by being connected on bellows flange come conduction measurement pressure, then passes through converting unit,
It is changed into standard signal (20-100KPa) output.The shortcomings that this pressure transmitter the predominantly following: in element assembling side
Face, the process that pressure transmitter installs capillary is very cumbersome, and the auxiliary element needed is relatively more；Installation at the scene, by
In the presence of capillary, pressure transmitter can occupy very big installation space；In terms of security protection, due to pressure transmitter
Capillary is very long also very fragile, at the scene under complex environment, protects highly difficult, is very easy to cause the damage of capillary
It is bad.
Summary of the invention
In view of the problems of the existing technology, the present invention provides a kind of high-precision pneumatic pressure transmitter.Skill of the invention
Art scheme are as follows:
A kind of high-precision pneumatic pressure transmitter, including measuring unit and converting unit；The measuring unit includes bellows
Flange, bellows flange top connect connecting column, offer the through-hole passed through for pressure transmitting medium in the connecting column；
The converting unit includes Bourdon tube, main shaft, nozzle flapper and relay, described Bourdon tube one end and the connection
Column connection, and the Bourdon tube is communicated with the through-hole；The other end of the Bourdon tube is connect with one end of the main shaft, institute
The other end for stating main shaft is connect with one end of the nozzle flapper, and the other end of the nozzle flapper is connect with the relay.
Further, the bellows flange is connected with the connecting column by counter flange.
Further, the connecting column and the Bourdon tube pass through kidney-shaped flanged joint.
Further, between the bellows flange and the counter flange and the Bourdon tube and the kidney-shaped flange it
Between be equipped with sealing ring.
Further, the height of the connecting column is 120~130mm.
Further, the internal diameter of the through-hole is 6mm.
Further, the pressure transmitter further includes feedback bellow and range bar assembly, the feedback bellow
Gas circuit is connect with the relay, and the mechanical part of the feedback bellow is connect with the range bar assembly, the range bar
Component is connect with the main shaft.
The working principle of pressure transmitter of the invention are as follows: the site pressure parameter that bellows flange measures passes through in connecting column
The pressure conduction medium such as silicone oil in portion is transferred to Bourdon tube, and Bourdon tube generates deformation, when deformation occurs for Bourdon tube, this shape
Torque-variable is converted into corresponding torque and acts on main shaft, control spindle swing, thus nozzle flapper nozzle and baffle it
Between generate spacing variation, nozzle back pressure be proportional to baffle movement variation, this back pressure after relay changes as output, pass
Pass control system.
The beneficial effects of the present invention are:
1) present invention simplifies internal structure by modularized design thinking, so that integrated external form be presented, entirety is more
It is beautiful；
2) it is different from interminable capillary design, the present invention is transmitted using the internal connecting column for being equipped with through-hole by measuring pressure
Parameter, has the advantages that with high accuracy and more convenient when assembling pressure transmitter, produces the efficiency of pressure transmitter more
It is high；
3) pressure transmitter of the invention is structure as a whole, and does not need too big installation space, and does not have to consider capillary
The safeguard measure of pipe.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of the invention；
Fig. 2 is the schematic diagram of internal structure of converting unit of the invention；
Fig. 3 is the connection schematic diagram of connecting column two sides of the invention；
Fig. 4 is the structural schematic diagram of the connecting flange of connecting column two sides of the invention, and wherein Fig. 3-1 is kidney-shaped flange, figure
3-2 is counter flange；
Fig. 5 is the working principle of the invention figure；
In Fig. 1~5,1- converting unit, 2- bellows flange, 3- connecting column, 4- through-hole, 5- kidney-shaped flange, 6- counter flange,
7- Bourdon tube, 8- main shaft, 9- dial, 10- relay, 11- zeroing spring, 12- zeroing knob, 13- balancing spring, 14- are anti-
Feedback bellows, 15- mounting base, 16- gas path plate, 17- nozzle, 18- baffle, 19- range bar, 20- tune range screw, 21- are close
Seal.
Note: the unit of all sizes is mm in upper figure.
Specific embodiment
In the description of the present invention, it should be noted that the person that is not specified actual conditions in embodiment, according to normal conditions or
The condition that manufacturer suggests carries out.Reagents or instruments used without specified manufacturer is that can be obtained by commercially available purchase
Conventional products.
The present invention is described in further details below with reference to specific embodiment, it is described be explanation of the invention without
It is to limit.
As shown in figures 1-4, the specific embodiment of the invention provides a kind of structural representation of high-precision pneumatic pressure transmitter
Figure, the height of entire transmitter is about 240mm.Its structure includes measuring unit and converting unit 1；The measuring unit includes film
Box flange 2,2 top of bellows flange connect connecting column 3 by counter flange 6, offer in the connecting column 3 logical for silicone oil
The through-hole 4 crossed.The height of connecting column 3 is 124mm, and the internal diameter of through-hole is 6mm.
The converting unit 1 includes mounting base 15, the main shaft 8 being located on the mounting base 15, nozzle flapper, servo
Device 10, feedback bellow 14 and range bar assembly, and it is located at the Bourdon tube 7 in 15 outside of mounting base, the installation bottom
Plate 15 is equipped with Bourdon tube 7, and described 7 one end of Bourdon tube is connect by kidney-shaped flange 5 with the connecting column 3, and the bowden
Pipe 7 is communicated with the through-hole 4；The other end of the Bourdon tube 7 is connect by a pulling shaft with one end of the main shaft 8, described
The other end of main shaft 8 is connect with one end of the nozzle flapper, and the other end of the nozzle flapper is connect with the relay 10.
The main shaft 8 is also connect with the range bar assembly, and the mechanical part of the range bar assembly and the feedback bellow 14 connects
It connects, is additionally provided with zeroing spring 11 between the two, zeroing spring 11 is mainly responsible for the height and range bar group of feedback bellow 14
Equilibrium process between part, 11 bottom of zeroing spring are equipped with zeroing knob 12.The nozzle flapper is by nozzle 17 and baffle
18 compositions.The range bar assembly includes dial 9, range bar 19 and adjusts range screw 20, and the dial 9 is fixed on described
On mounting base 15, the range bar 19 is connect by the tune range screw 20 with the main shaft 8, and the range bar 19 can edge
The radian of 9 high scale of dial is swung.The gas circuit phase of the output gas source and the feedback bellow 14 of the relay 10
It is logical.The converting unit 1 is additionally provided with gas path plate 16, and the gas path plate 16 is used for the nozzle 17 and the feedback bellow 14
Air pressure is provided.
The counter flange 6 and the kidney-shaped flange 5 are welded on the connecting column 3 by argon arc welding technology, the film
The O shape of radial seal is equipped between box flange 2 and the counter flange 6 and between the Bourdon tube 7 and the kidney-shaped flange 5
Sealing ring 21, and fixed with four soket head cap screws, finally by screw spot welding.Connecting column and the flange assembly welded with it whole
It is metal material, inside does not have fallible component, so that pressure transmitter is more safe and reliable in use, and does not have to dimension
It repairs.In production, opened among connecting column firstThrough-hole, secondly by kidney-shaped flange and counter flange according to corresponding angle
Degree is divided in connecting column two sides, and finally seam crossing built-up welding is got up using argon arc welding, reaches the requirement of sealing silicone oil.Fig. 3
The structure snd size schematic diagram of flange assembly for specifically disclosing the connecting column of the present embodiment and being welded with it.Fig. 4 is specifically disclosed
The structure snd size schematic diagrames of two kinds of flange assemblies.
The kidney-shaped flange 5 is connected with the Bourdon tube 7 of conversion portion 1, is equally provided with the O shape of radial seal between the two
Sealing ring, and fixed with two outer six side's screws, finally by screw spot welding.
Because the fixing screws of junction have been carried out point without maintenance by connecting column and the flange assembly welded with it
Weldering can not only eliminate screw loosening caused by being shaken by field pipes, can also prevent silicone oil caused by worker's maloperation from letting out
Dew.
The working principle of the pressure transmitter of the specific embodiment of the invention is as shown in figure 5, the scene pressure that bellows flange measures
Force parameter is transferred to Bourdon tube by the silicone oil inside connecting column, and Bourdon tube generates deformation, this when deformation occurs for Bourdon tube
Deformation torque is converted into corresponding torque and acts on main shaft, spindle swing is controlled, thus in the nozzle and baffle of nozzle flapper
Between generate spacing variation, nozzle back pressure be proportional to baffle movement variation, this back pressure after relay changes as output,
Pass to control system.Meanwhile the output pressure is admitted to feedback bellow again and is converted into mechanical force, which is made by range bar
With on main shaft, to constitute the negative-feedback for offsetting input (torque), output is made to reach balance.
To sum up, pressure transmitter disclosed in the specific embodiment of the invention has the advantage that
1) by modularized design thinking, internal structure is simplified, so that integrated external form is presented, it is whole more aesthetically pleasing；
2) it is different from interminable capillary design, the present invention is transmitted using the internal connecting column for being equipped with through-hole by measuring pressure
Parameter, has the advantages that with high accuracy and more convenient when assembling pressure transmitter, produces the efficiency of pressure transmitter more
It is high；
3) integrated pressure transmitter, inside conduction connecting column are connect with Bourdon tube, and silicone oil controls the deformation of Bourdon tube,
By the less of the silicon oil infilling of measuring pressure, departmental cost can be saved.
4) integrated pressure transmitter when installing at the scene, does not need too big installation space, and does not have to consider hair
The safeguard measure of tubule.
5) seal form of measuring unit takes O-ring and method that argon arc welding combines, greatly improves pressure change
Send the sealing performance of device.
6) present invention is in addition to can be applied to the pneumatic pressure-retaining system of shield machine, and wherein the major function of pressure transmitter is
It is responsible for measure field pressure parameter and conversion transmitting, is used cooperatively with control system, it is also possible to is applied to change
The scene such as work, power plant needs the occasion of pressure measurement.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, modifies, replacement and variant.
Claims (8)
1. a kind of high-precision pneumatic pressure transmitter, speciality are, including measuring unit and converting unit；The measuring unit
Including bellows flange, bellows flange top connects connecting column, offers in the connecting column and passes through for pressure transmitting medium
Through-hole；
The converting unit includes Bourdon tube, main shaft, nozzle flapper and relay, and described Bourdon tube one end and the connecting column connect
It connects, and the Bourdon tube is communicated with the through-hole；The other end of the Bourdon tube is connect with one end of the main shaft, the master
The other end of axis is connect with one end of the nozzle flapper, and the other end of the nozzle flapper is connect with the relay.
2. a kind of high-precision pneumatic pressure transmitter according to claim 1, speciality are, the bellows flange and institute
Connecting column is stated to connect by counter flange.
3. a kind of high-precision pneumatic pressure transmitter according to claim 2, speciality are, the bellows flange and institute
It states and is equipped with sealing ring between counter flange.
4. a kind of high-precision pneumatic pressure transmitter according to claim 1, speciality are, the connecting column and described
Bourdon tube passes through kidney-shaped flanged joint.
5. a kind of high-precision pneumatic pressure transmitter according to claim 4, speciality are, the Bourdon tube and described
Sealing ring is equipped between kidney-shaped flange.
6. a kind of high-precision pneumatic pressure transmitter according to claim 1, speciality are, the height of the connecting column
For 120~130mm.
7. a kind of high-precision pneumatic pressure transmitter according to claim 6, speciality are that the internal diameter of the through-hole is
6mm。
8. a kind of high-precision pneumatic pressure transmitter, speciality described in any one claim exist according to claim 1~7
In, the pressure transmitter further include feedback bellow and range bar assembly, the gas circuit of the feedback bellow and the servo
Device connection, the mechanical part of the feedback bellow are connect with the range bar assembly, the range bar assembly and the main shaft
Connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910223629.5A CN109752133A (en) | 2019-03-22 | 2019-03-22 | A kind of high-precision pneumatic pressure transmitter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910223629.5A CN109752133A (en) | 2019-03-22 | 2019-03-22 | A kind of high-precision pneumatic pressure transmitter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109752133A true CN109752133A (en) | 2019-05-14 |
Family
ID=66409193
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910223629.5A Pending CN109752133A (en) | 2019-03-22 | 2019-03-22 | A kind of high-precision pneumatic pressure transmitter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109752133A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1545716A (en) * | 1966-09-26 | 1968-11-15 | Dresser Ind | Pneumatic transmitter |
| CN101251375A (en) * | 2008-04-03 | 2008-08-27 | 合肥工业大学 | Micro-nano gradation press type gas needle sensor |
| CN207832370U (en) * | 2017-12-01 | 2018-09-07 | 北京凯姆斯智控科技有限公司 | A kind of double balancing arm type pneumatic pressure transmitters |
| CN108679294A (en) * | 2018-07-30 | 2018-10-19 | 辰星仪表（成都）有限公司 | Differential type nozzle flapper pressure regulating device |
| CN209459812U (en) * | 2019-03-22 | 2019-10-01 | 银川英奥特自控股份有限公司 | A kind of high-precision pneumatic pressure transmitter |
-
2019
- 2019-03-22 CN CN201910223629.5A patent/CN109752133A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1545716A (en) * | 1966-09-26 | 1968-11-15 | Dresser Ind | Pneumatic transmitter |
| CN101251375A (en) * | 2008-04-03 | 2008-08-27 | 合肥工业大学 | Micro-nano gradation press type gas needle sensor |
| CN207832370U (en) * | 2017-12-01 | 2018-09-07 | 北京凯姆斯智控科技有限公司 | A kind of double balancing arm type pneumatic pressure transmitters |
| CN108679294A (en) * | 2018-07-30 | 2018-10-19 | 辰星仪表（成都）有限公司 | Differential type nozzle flapper pressure regulating device |
| CN209459812U (en) * | 2019-03-22 | 2019-10-01 | 银川英奥特自控股份有限公司 | A kind of high-precision pneumatic pressure transmitter |
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