CN109489876A - Pressure transmitter for shield screw machine - Google Patents
Pressure transmitter for shield screw machine Download PDFInfo
- Publication number
- CN109489876A CN109489876A CN201710818106.6A CN201710818106A CN109489876A CN 109489876 A CN109489876 A CN 109489876A CN 201710818106 A CN201710818106 A CN 201710818106A CN 109489876 A CN109489876 A CN 109489876A
- Authority
- CN
- China
- Prior art keywords
- elastomer
- pressure transmitter
- conversion circuit
- shell
- compensating plate
- 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.)
- Withdrawn
Links
- 239000000806 elastomer Substances 0.000 claims abstract description 39
- 229920001971 elastomer Polymers 0.000 claims abstract description 37
- 238000006243 chemical reaction Methods 0.000 claims abstract description 27
- 239000011888 foil Substances 0.000 claims abstract description 14
- 238000007789 sealing Methods 0.000 claims description 12
- 238000002788 crimping Methods 0.000 claims description 10
- 238000012856 packing Methods 0.000 claims description 9
- 238000003466 welding Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 238000013461 design Methods 0.000 abstract description 10
- 239000002689 soil Substances 0.000 description 4
- 238000012545 processing Methods 0.000 description 3
- 239000010963 304 stainless steel Substances 0.000 description 2
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000000649 photocoagulation Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 239000011265 semifinished product Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/20—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress
- G01L1/22—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using resistance strain gauges
Abstract
The invention discloses a kind of pressure transmitters for shield screw machine, including elastomer, foil gauge, enameled wire, compensating plate, conversion circuit, signal output lead and shell；Strain gauge adhesion is on elastomer, one end of enameled wire is electrically connected to foil gauge, and the other end is fixedly installed on compensating plate, compensating plate is set on elastomer, conversion circuit is set on compensating plate by way of contact pin, signal output lead is electrically connected with conversion circuit, and enameled wire, compensating plate, conversion circuit and signal output lead are all set in shell, and elastomer is fixedly installed on one end of shell；Foil gauge generates voltage signal according to the deformation of elastomer, and voltage signal is transmitted to conversion circuit by enameled wire, and voltage signal is converted to current signal by conversion circuit, and is exported by signal output lead.Of the invention is simple and practical in structure, can save the inside occupied space of shield screw machine, to better meet the design requirement of Domestic Shield screw machine.
Description
Technical field
The present invention relates to a kind of pressure transmitters for shield screw machine.
Background technique
Screw machine soil pressure case is the prison for monitoring shield screw machine internal pipe pressure when conveying mud soil
Survey instrument.Currently, the signal of the Control System Design receiving sensor of Domestic Shield screw machine is mostly the electric current letter of 4mA~20mA
Number, and by the mostly millivolt magnitude voltage signals of the screw machine soil pressure case of external import output, it is therefore desirable to it is arranged in outside
The pick-up cabinet of 4mA~20mA.But since the volume of pick-up cabinet is larger, such way occupies shield spiral to a certain extent
The space of machine can not better meet the design requirement of Domestic Shield screw machine, also not adapt to the upgrading of domestic technology gradually.
Summary of the invention
The technical problem to be solved by the present invention is in order to overcome in the prior art shield screw machine need to be arranged pick-up cabinet, because
This occupies the space of shield screw machine, can not better meet the defect of design requirement, provides a kind of for shield screw machine
Pressure transmitter.
The present invention is to solve above-mentioned technical problem by following technical proposals:
A kind of pressure transmitter for shield screw machine, it is characterized in that, the pressure transmitter includes elastomer, answers
Become piece, enameled wire, compensating plate, conversion circuit, signal output lead and shell；
For the strain gauge adhesion on the elastomer, one end of the enameled wire is electrically connected to the foil gauge, and another
One end is fixedly installed on the compensating plate, and the compensating plate is set on the elastomer, and the conversion circuit passes through contact pin
Mode be set on the compensating plate, the signal output lead is electrically connected with the conversion circuit, the enameled wire, described
Compensating plate, the conversion circuit and the signal output lead are all set in the shell, and the elastomer is fixedly installed on
One end of the shell；
For the foil gauge for generating voltage signal according to the deformation of the elastomer, the enameled wire is used for will be described
Voltage signal is transmitted to the conversion circuit, and the conversion circuit is used to the voltage signal being converted to current signal, and
It is exported by the signal output lead.
Preferably, the foil gauge is resistance strain gage.
Preferably, the pressure transmitter further includes the first washer and screw, first washer is supported in the compensation
Between plate and the elastomer, the compensating plate is fixedly installed on the elastomer by the screw.
In the present solution, the compensating plate by first washer come location and installation height.
Preferably, the elastomer is connect with the outer casing screw, and the elastomer is by way of laser welding
It is fixedly installed on one end of the shell.
In the present solution, being screwed one end of the shell on the screw thread of the elastomer, and by swashing
The mode of photocoagulation make it is non-dismountable between the shell and the elastomer, to improve protective.
Preferably, the pressure transformer further includes power input conducting wire, the power input conducting wire and conversion electricity
Road electrical connection, the power input conducting wire are set in the shell, and for connecting power supply.
Preferably, the pressure transformer further includes cable and heat-shrink tube, one end of the cable leads to described
The other end of shell, and the other end is electrically connected with the power input conducting wire and the signal output lead, the power input
Conducting wire and the signal output lead are all set in the heat-shrink tube.
Preferably, the pressure transformer further includes crimping Glan, sealing ring and second packing ring, the crimping Glan, institute
It states sealing ring and the second packing ring is sheathed on the cable.
Become in the present solution, forming the pressure by the crimping Glan, the sealing ring and the second packing ring
The sealing of the leading-out terminal of depressor, to improve protective.
Preferably, the range of the total length of the pressure transmitter is 60mm~65mm；And/or
The range of the diameter of the circular end face of the elastomer is 28mm~32mm；And/or
The range of the diameter of the end face of the cable is 8mm~12mm.
Preferably, the material of the shell is 304 stainless steels (one of stainless steel material, density 7.93g/cm3)。
In the present solution, 304 stainless steel has the characteristics that processing performance is good, toughness is high, therefore can better meet
The design requirement of the shell of the pressure transmitter.
Preferably, the current signal is the current signal of 4mA~20mA, the voltage signal is millivolt step voltage letter
Number.
On the basis of common knowledge of the art, above-mentioned each optimum condition, can any combination to get each preferable reality of the present invention
Example.
The positive effect of the present invention is that:
Shield spiral shell is made by simple and practical structure design provided by the present invention for the pressure transmitter of shield screw machine
The originally compact space of rotation machine maximizes, the direct output current signal of pressure transmitter, without separately adding pick-up cabinet, and it is described
The inductive probe of pressure transmitter is preposition, without components such as adjusting rods, has saved the inside occupied space of shield screw machine, thus
The design requirement of Domestic Shield screw machine is better meet, the pressure transmitter, which also passes through totally-enclosed safeguard structure, makes protection etc.
Grade reaches IP68 (dust-proof and waterproof index one kind).
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the pressure transmitter for shield screw machine of present pre-ferred embodiments.
Description of symbols:
Elastomer 1
Foil gauge 2
Enameled wire 3
Compensating plate 4
Screw 5
First washer 6
Conversion circuit 7
Signal output lead 8
Power input conducting wire 9
Heat-shrink tube 10
Crimping Glan 11
Second packing ring 12
Sealing ring 13
Shell 14
Cable 15
The total length L of pressure transmitter for shield screw machine
The diameter D of the circular end face of elastomer1
The diameter D of the end face of cable2
Specific embodiment
The present invention is further illustrated below by the mode of embodiment, but does not therefore limit the present invention to the reality
It applies among a range.
As shown in Figure 1, the pressure transmitter provided in this embodiment for shield screw machine includes elastomer 1, foil gauge
2, enameled wire 3, compensating plate 4, screw 5, the first washer 6, conversion circuit 7, signal output lead 8, power input conducting wire 9, pyrocondensation
Pipe 10, crimping Glan 11, second packing ring 12, sealing ring 13, shell 14 and cable 15, the pressure transmitter is for monitoring shield
Structure screw machine internal pipe pressure when conveying mud soil, and transmit a signal to the control system of shield screw machine.
Specifically, foil gauge 2 is resistance strain gage, and it is pasted on elastomer 1 by technique, one end electricity of enameled wire 3
It is connected to foil gauge 2 and forms electric bridge, and the other end is fixedly installed on compensating plate 4, the support of the first washer 6 by welding
Between compensating plate 4 and elastomer 1, compensating plate 4 is set by the first washer 6 come location and installation height, then by screw 5 to fix
It is placed on elastomer 1, conversion circuit 7 passes through contact pin and is fixedly installed on compensating plate 4 by way of welding, and is formed after debugging
Pressure transmitter semi-finished product simultaneously draw signal output lead 8 and power input conducting wire 9, and signal output lead 8 and power input are led
Line 9 is electrically connected with conversion circuit 7 respectively.
Enameled wire 3, compensating plate 4, conversion circuit 7, signal output lead 8 and power input conducting wire 9 are all set in shell 14
It is interior.Elastomer 1 is used with one end of shell 14 and is threadedly coupled, by the screw thread being screwed in elastomer 1 of one end of shell 14
On, and made by way of laser welding non-dismountable between shell 14 and elastomer 1.One end of cable 15 leads to outer
The other end of shell 14, and the other end is electrically connected with signal output lead 8 and power input conducting wire 9, signal output lead 8 and power supply
Input lead 9 is all set in heat-shrink tube 10, and does insulation processing by heat-shrink tube 10 and 15 junction of cable.Crimping Glan
11, second packing ring 12 and sealing ring 13 are sheathed on cable 15, and first crimping Glan 11 is inserted on cable 15, then by
Two washers 12 are inserted on cable 15, then sealing ring 13 is inserted on cable 15, then fill in cable 15 in shell 14,
Sealing ring 13 and second packing ring 12 are sequentially pressed into again in the matching hole of the other end of shell 14, finally pass through crimping Glan 11
It is threaded into shell 14 and compresses, 13 stress deformation of sealing ring is forced, to form the sealing of leading-out terminal.
In the present embodiment, the material of shell 14 is 304 stainless steels, 304 stainless steel good, toughness with processing performance
The features such as high, therefore the design requirement of the shell of the pressure transmitter can be better meet.Pressure for shield screw machine
The total length L (part in addition to cable 15) of transmitter is 63.8mm, the diameter D of the circular end face of elastomer1For 30mm,
The diameter D of the end face of cable2For 10mm, it is not limited to this size, can also be adjusted correspondingly according to the actual situation.
The working principle of the pressure transmitter is specifically described below.
Elastomer will generate deformation when being under pressure, foil gauge is used to generate change in resistance according to the deformation of elastomer,
And a millivolt magnitude voltage signals are generated according to change in resistance, enameled wire is used to the voltage signal being transmitted to conversion circuit,
Conversion circuit is used to be converted to millivolt magnitude voltage signals the current signal of 4mA~20mA, and by signal output lead come
It exports to the control system of shield screw machine, the current signal of 4mA~20mA also complies with Domestic Shield screw machine and connects to sensor
The requirement of the collection of letters number, power input conducting wire provide phase to the pressure transmitter for connecting power supply, by power input conducting wire
The power supply answered.
Pressure transmitter provided in this embodiment for shield screw machine makes shield by simple and practical structure design
The originally compact space of screw machine maximizes, the direct output current signal of pressure transmitter, without separately adding pick-up cabinet, and institute
The inductive probe for stating pressure transmitter is preposition, without components such as adjusting rods, has saved the inside occupied space of shield screw machine, from
And the design requirement of Domestic Shield screw machine is better meet, the pressure transmitter, which also passes through totally-enclosed safeguard structure, to be made to protect
Grade reaches IP68.
Although specific embodiments of the present invention have been described above, it will be appreciated by those of skill in the art that this is only
For example, protection scope of the present invention is to be defined by the appended claims.Those skilled in the art without departing substantially from
Under the premise of the principle and substance of the present invention, many changes and modifications may be made, but these change and
Modification each falls within protection scope of the present invention.
Claims (10)
1. a kind of pressure transmitter for shield screw machine, which is characterized in that the pressure transmitter includes elastomer, strain
Piece, enameled wire, compensating plate, conversion circuit, signal output lead and shell；
For the strain gauge adhesion on the elastomer, one end of the enameled wire is electrically connected to the foil gauge, and the other end
It is fixedly installed on the compensating plate, the compensating plate is set on the elastomer, the side that the conversion circuit passes through contact pin
Formula is set on the compensating plate, and the signal output lead is electrically connected with the conversion circuit, the enameled wire, the compensation
Plate, the conversion circuit and the signal output lead are all set in the shell, and the elastomer is fixedly installed on described
One end of shell；
The foil gauge is used for for generating voltage signal, the enameled wire according to the deformation of the elastomer by the voltage
Signal is transmitted to the conversion circuit, and the conversion circuit is used to the voltage signal being converted to current signal, and passes through
The signal output lead exports.
2. pressure transmitter as described in claim 1, which is characterized in that the foil gauge is resistance strain gage.
3. pressure transmitter as described in claim 1, which is characterized in that the pressure transmitter further includes the first washer and spiral shell
Nail, first washer are supported between the compensating plate and the elastomer, and the compensating plate is fixed by the screw
It is set on the elastomer.
4. pressure transmitter as described in claim 1, which is characterized in that the elastomer is connect with the outer casing screw, and
And the elastomer is fixedly installed on one end of the shell by way of laser welding.
5. pressure transmitter as described in claim 1, which is characterized in that the pressure transformer further includes that power input is led
Line, the power input conducting wire are electrically connected with the conversion circuit, and the power input conducting wire is set in the shell, and are used
In connection power supply.
6. pressure transmitter as claimed in claim 5, which is characterized in that the pressure transformer further includes cable and pyrocondensation
Pipe, one end of the cable lead to the other end of the shell, and the other end and the power input conducting wire and the letter
The electrical connection of number output lead, the power input conducting wire and the signal output lead are all set in the heat-shrink tube.
7. pressure transmitter as claimed in claim 6, which is characterized in that the pressure transformer further includes crimping Glan, close
Seal and second packing ring, the crimping Glan, the sealing ring and the second packing ring are sheathed on the cable.
8. pressure transmitter as claimed in claim 6, which is characterized in that the range of the total length of the pressure transmitter is
60mm~65mm；And/or
The range of the diameter of the circular end face of the elastomer is 28mm~32mm；And/or
The range of the diameter of the end face of the cable is 8mm~12mm.
9. pressure transmitter as described in claim 1, which is characterized in that the material of the shell is 304 stainless steels.
10. the pressure transmitter as described in any one of claim 1~9, which is characterized in that the current signal is 4mA
The current signal of~20mA, the voltage signal are millivolt magnitude voltage signals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710818106.6A CN109489876A (en) | 2017-09-12 | 2017-09-12 | Pressure transmitter for shield screw machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710818106.6A CN109489876A (en) | 2017-09-12 | 2017-09-12 | Pressure transmitter for shield screw machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109489876A true CN109489876A (en) | 2019-03-19 |
Family
ID=65688606
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710818106.6A Withdrawn CN109489876A (en) | 2017-09-12 | 2017-09-12 | Pressure transmitter for shield screw machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109489876A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996027124A1 (en) * | 1995-02-28 | 1996-09-06 | Rosemount Inc. | Pressure transmitter with remote seal diaphragm and correction circuit therefor |
| CN204007949U (en) * | 2014-08-13 | 2014-12-10 | 上海雷尼威尔技术有限公司 | The mounting structure of pressure unit |
| CN105372004A (en) * | 2014-08-25 | 2016-03-02 | 上海朝辉压力仪器有限公司 | Slurry transmitter |
| CN105466622A (en) * | 2014-08-25 | 2016-04-06 | 上海朝辉压力仪器有限公司 | Pressure transmitter for compressor |
| CN206220966U (en) * | 2016-11-02 | 2017-06-06 | 上海朝辉压力仪器有限公司 | Native storehouse soil pressure transmitter |
| CN207317975U (en) * | 2017-09-12 | 2018-05-04 | 上海朝辉压力仪器有限公司 | Pressure transmitter for shield screw machine |
-
2017
- 2017-09-12 CN CN201710818106.6A patent/CN109489876A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996027124A1 (en) * | 1995-02-28 | 1996-09-06 | Rosemount Inc. | Pressure transmitter with remote seal diaphragm and correction circuit therefor |
| CN204007949U (en) * | 2014-08-13 | 2014-12-10 | 上海雷尼威尔技术有限公司 | The mounting structure of pressure unit |
| CN105372004A (en) * | 2014-08-25 | 2016-03-02 | 上海朝辉压力仪器有限公司 | Slurry transmitter |
| CN105466622A (en) * | 2014-08-25 | 2016-04-06 | 上海朝辉压力仪器有限公司 | Pressure transmitter for compressor |
| CN206220966U (en) * | 2016-11-02 | 2017-06-06 | 上海朝辉压力仪器有限公司 | Native storehouse soil pressure transmitter |
| CN207317975U (en) * | 2017-09-12 | 2018-05-04 | 上海朝辉压力仪器有限公司 | Pressure transmitter for shield screw machine |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20190319 |