CN204556160U - A kind of digital pressure transmitter - Google Patents

A kind of digital pressure transmitter Download PDF

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Publication number
CN204556160U
CN204556160U CN201520213907.6U CN201520213907U CN204556160U CN 204556160 U CN204556160 U CN 204556160U CN 201520213907 U CN201520213907 U CN 201520213907U CN 204556160 U CN204556160 U CN 204556160U
Authority
CN
China
Prior art keywords
pressure
over
housing
wiring board
hart protocol
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.)
Expired - Fee Related
Application number
CN201520213907.6U
Other languages
Chinese (zh)
Inventor
王惜芳
成韦
刁国荣
周秀成
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ZIBO FEIYAN XIANXING CONTROL TECHNOLOGY Co Ltd
Original Assignee
ZIBO FEIYAN XIANXING CONTROL TECHNOLOGY Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by ZIBO FEIYAN XIANXING CONTROL TECHNOLOGY Co Ltd filed Critical ZIBO FEIYAN XIANXING CONTROL TECHNOLOGY Co Ltd
Priority to CN201520213907.6U priority Critical patent/CN204556160U/en
Application granted granted Critical
Publication of CN204556160U publication Critical patent/CN204556160U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

A kind of digital pressure transmitter, belongs to pressure sensing devices field.Comprise housing (11) and pressure X-over (1), it is characterized in that: in described housing (11), be provided with the display gauge head (6), HART protocol-intelligent wiring board (7) and the anti-interference plate (9) that connect successively, the bottom thread Bonding pressure X-over (1) of described housing (11), described pressure X-over (1) built-in pressure transducer (2), pressure X-over (1) offers and is communicated with pressure transducer (2) and outside impulse mouth, signal wire and the HART protocol-intelligent wiring board (7) of described pressure transducer (2) electrically connect.The utility model volume is little, operation succinct, can low cost application obtain degree of precision result, facilitate reading again.

Description

A kind of digital pressure transmitter
Technical field
A kind of digital pressure transmitter, belongs to pressure sensing devices field.
Background technology
Current pressure unit mainly divides simulated pressure transmitter and intelligent pressure transmitter, for measuring the pressure of liquid, gas and steam.Existing simulated pressure transmitter operation complexity is not portable, has been not suitable with increasingly sophisticated industry control environment, poor anti jamming capability, causes producing and correct on-the-spot complexity because not being with communication function.Intelligent pressure transmitter mostly is condenser type intelligent pressure transmitter, because capacitive sensor structure is complicated, causes complex production process, inefficiency; Equipment own vol is huge, limits during practical application by space condition, and application cost is high.Though the pressure unit of above two kinds of forms is all with display, because of the impact of installation site, the often visual angle of inconvenient reading again.The problem that existing pressure unit volume is large, complex operation, cost are high, reading is inconvenient, becomes the difficult problem that current pressure transmitter needs to overcome and solve.
Utility model content
The technical problems to be solved in the utility model is: overcome the deficiencies in the prior art, provides the digital pressure transmitter that a kind of volume is little, operation is succinct, facilitate reading.
The utility model solves the technical scheme that its technical matters adopts: this digital pressure transmitter, comprise housing and pressure X-over, it is characterized in that: in described housing, be provided with the display gauge head, HART protocol-intelligent wiring board and the anti-interference plate that connect successively, the bottom thread Bonding pressure X-over of described housing, the described built-in pressure transducer of pressure X-over, pressure X-over offers and is communicated with pressure transducer and outside impulse mouth, signal wire and the HART protocol-intelligent wiring board of described pressure transducer electrically connect.
The utility model adopts the built-in pressure transducer of pressure X-over, reduces overall volume.Be that HART protocol-intelligent wiring board sets up anti-interference plate in enclosure interior, the antijamming capability strengthening pressure unit ensures the accuracy of measurement data.The junction of housing and pressure X-over is sealed by O-ring seal, is locked between housing and pressure X-over by lock-screw.Adopt O-ring seal to seal between housing and pressure X-over, ensure the stable of enclosure interior environment, prevent the corrosion of internal unit, increase service life of equipment.
Up big and down small step-like through hole is offered in described pressure X-over bottom, and pressure transducer is fixed on the top of step-like through hole and utilizes hold-down ring to be fixed, and described impulse mouth is formed at the bottom of step-like through hole.Ensure that pressure transducer is installed stable, ensure the accuracy of determination data further.
Described pressure transducer is diffuse si piezoresistive transducer.Built-in diffusion silicon pressure sensor, precision is high, compact, and production run processing ease, field installation process is simple.
Also by the locking of radial lock-screw between described housing and pressure X-over.
Described display gauge head is flush-mounted on HART protocol-intelligent wiring board, and display gauge head be coupling can 360 ° of rotations on HART protocol-intelligent wiring board.Not by in-site installation position influence, the reading visual angle of needs can be chosen at random.The display gauge head side of housing utilizes the cover plate end socket with transparent windows, can read out display gauge head reading at view window place.
Described display gauge head is LCD LCD plate.
The inside of described housing is provided with the left chamber and right chamber that are connected by through hole.Increase the inner wall area that enclosure interior can be used to fix, reduce internal unit activity space, ensure equipment fixation, the equipment reduced in two chambers disturbs mutually simultaneously.
The inside of described housing is provided with the left chamber and right chamber that are connected by through hole, display gauge head and HART protocol-intelligent wiring board are fixed in left chamber, anti-interference plate is fixed on right chamber, and anti-interference plate is connected with HART protocol-intelligent wiring board by two 24V power supply lead wires.Anti-interference plate designs separately the anti-electromagnetic interference capability that can improve whole transmitter in a chamber, can select H2088T pressure unit circle card.
Described HART protocol-intelligent wiring board comprises CPU (central processing unit), amplifier circuit, A/D change-over circuit, D/A change-over circuit, communicating circuit, display circuit and key circuit.Described HART protocol-intelligent circuit strip HART agreement, can meet the requirement of fieldbus in automatic control system, realize telecommunication.The requirement of fieldbus in automatic control system can be met with HART agreement.
Compared with prior art, the beneficial effect that the utility model digital pressure transmitter has is: the utility model adopts the pressure X-over of compact to eliminate the clumsiness of flange fixation of sensor, installation method is simple, production operation is easy, require low to the technical merit of workman, reduce running cost.The collection of pressure signal is by diffuse si piezoresistive transducer, and as the core component of whole pressure unit, not only precision is high, and volume is little is convenient to Installation and Debugging, and cost is low.Can 360 ° rotate liquid crystal display gauge outfits, do not affect by installation site, freely can adjust gauge outfit until rotate to the visual angle facilitating reading.With the intelligent line plate of HART agreement, the requirement of fieldbus in automatic control system can be met, realize telecommunication, facilitate the maintenance of instrument.Independent anti-interference plate design, than the Anti-interference Design be integrated on intelligent line plate, more can resist strong electromagnetic interference (EMI).In a word, the utility model volume is little, operation is succinct, can low cost application obtain degree of precision result, facilitate reading again.
Accompanying drawing explanation
Fig. 1 is the sectional view of a kind of digital pressure transmitter of the utility model.
Fig. 2 is the front view of a kind of digital pressure transmitter of the utility model.
Fig. 3 is the schematic block circuit diagram of a kind of digital pressure transmitter of the utility model.
Wherein, 1, pressure X-over 2, pressure transducer 3, hold-down ring 4, lock-screw 5, O-ring seal 6, display gauge head 7, HART protocol-intelligent wiring board 8, copper post 9, anti-interference plate 10, screw 11, housing 12, left chamber 13, right chamber.
Embodiment
Fig. 1 ~ 3 are most preferred embodiments of the present utility model, below in conjunction with accompanying drawing 1 ~ 3, are described further the utility model.
With reference to accompanying drawing 1,2: a kind of digital pressure transmitter of the present utility model, the bottom thread of housing 11 is connected with pressure X-over 1, and junction is sealed by O-ring seal 5, by lock-screw 4 further by housing and the locking of pressure X-over.Up big and down small step-like through hole is offered in pressure X-over 1 bottom, and pressure transducer 2 is fixed on the top of step-like through hole and utilizes hold-down ring 3 to be fixed, and the bottom of step-like through hole is formed and is communicated with pressure transducer 2 and outside impulse mouth, diffuse si piezoresistive transducer selected by pressure transducer 2, four signal wires of diffuse si piezoresistive transducer are welded to the signal input position of HART protocol-intelligent wiring board 7, display gauge head 6 is LCD LCD plate, display gauge head 6 is coupling on HART protocol-intelligent wiring board 7 can 360 ° of rotations, HART protocol-intelligent wiring board 7 is fixed in the left chamber 12 of housing 11 by two copper posts 8, anti-interference plate 9 independent design is connected with HART protocol-intelligent wiring board 7 by two 24V power supply lead wires, and by two screws 10, anti-interference plate 9 is fixed in the right chamber 13 of housing 11.
Principle of work, with reference to accompanying drawing 3: during work, measured medium is entered by the impulse mouth of pressure X-over 1, through pressure transducer 2, after pressure experienced by pressure transducer 2, output pressure signal, this pressure signal is transmitted on HART protocol-intelligent wiring board 7, anti-interference plate 9 can improve the anti-electromagnetic interference capability of whole transmitter, this pressure signal amplifies by the amplifier circuit on HART protocol-intelligent wiring board 7, pressure signal after amplifying provides input signal for A/D change-over circuit, A/D change-over circuit converts pressure signal to digital signal, send into CPU (central processing unit), digital signal after conversion is calculated by data by CPU (central processing unit), after linear process, by display gauge head 6, the result after process is shown on the one hand, on the other hand convert 4mA ~ 20mA signal of standard to by D/A change-over circuit and be superimposed with HART agreement and carry out teletransmission.
The above, it is only preferred embodiment of the present utility model, be not restriction the utility model being made to other form, any those skilled in the art may utilize the technology contents of above-mentioned announcement to be changed or be modified as the Equivalent embodiments of equivalent variations.But everyly do not depart from technical solutions of the utility model content, any simple modification, equivalent variations and the remodeling done above embodiment according to technical spirit of the present utility model, still belong to the protection domain of technical solutions of the utility model.

Claims (8)

1. a digital pressure transmitter, comprise housing (11) and pressure X-over (1), it is characterized in that: in described housing (11), be provided with the display gauge head (6) connected successively, HART protocol-intelligent wiring board (7) and anti-interference plate (9), the bottom thread Bonding pressure X-over (1) of described housing (11), described pressure X-over (1) built-in pressure transducer (2), pressure X-over (1) offers and is communicated with pressure transducer (2) and outside impulse mouth, signal wire and the HART protocol-intelligent wiring board (7) of described pressure transducer (2) electrically connect.
2. a kind of digital pressure transmitter according to claim 1, it is characterized in that: up big and down small step-like through hole is offered in described pressure X-over (1) bottom, pressure transducer (2) is fixed on the top of step-like through hole and utilizes hold-down ring (3) to be fixed, and described impulse mouth is formed at the bottom of step-like through hole.
3. a kind of digital pressure transmitter according to claim 1 and 2, is characterized in that: described pressure transducer (2) is diffuse si piezoresistive transducer.
4. a kind of digital pressure transmitter according to claim 1, is characterized in that: also by the locking of radial lock-screw (4) between described housing (11) and pressure X-over (1).
5. a kind of digital pressure transmitter according to claim 1, it is characterized in that: described display gauge head (6) is flush-mounted on HART protocol-intelligent wiring board (7), and display gauge head (6) be coupling can 360 ° of rotations on HART protocol-intelligent wiring board (7).
6. a kind of digital pressure transmitter according to claim 1 or 5, is characterized in that: described display gauge head (6) is LCD LCD plate.
7. a kind of digital pressure transmitter according to claim 1, is characterized in that: the inside of described housing (11) is provided with the left chamber (12) and right chamber (13) that are connected by through hole.
8. a kind of digital pressure transmitter according to claim 1, it is characterized in that: the inside of described housing (11) is provided with the left chamber (12) and right chamber (13) that are connected by through hole, display gauge head (6) and HART protocol-intelligent wiring board (7) are fixed in left chamber (12), anti-interference plate (9) is fixed on right chamber (13), and anti-interference plate (9) is connected with HART protocol-intelligent wiring board (7) by two 24V power supply lead wires.
CN201520213907.6U 2015-04-10 2015-04-10 A kind of digital pressure transmitter Expired - Fee Related CN204556160U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201520213907.6U CN204556160U (en) 2015-04-10 2015-04-10 A kind of digital pressure transmitter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201520213907.6U CN204556160U (en) 2015-04-10 2015-04-10 A kind of digital pressure transmitter

Publications (1)

Publication Number Publication Date
CN204556160U true CN204556160U (en) 2015-08-12

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201520213907.6U Expired - Fee Related CN204556160U (en) 2015-04-10 2015-04-10 A kind of digital pressure transmitter

Country Status (1)

Country Link
CN (1) CN204556160U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110595664A (en) * 2019-08-19 2019-12-20 江苏杰克仪表有限公司 Novel high-precision pressure transmitter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110595664A (en) * 2019-08-19 2019-12-20 江苏杰克仪表有限公司 Novel high-precision pressure transmitter

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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: 20150812

Termination date: 20160410