CN203561372U - Process variable transmitter with dual-compartment housing - Google Patents
Process variable transmitter with dual-compartment housing Download PDFInfo
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- CN203561372U CN203561372U CN201320613153.4U CN201320613153U CN203561372U CN 203561372 U CN203561372 U CN 203561372U CN 201320613153 U CN201320613153 U CN 201320613153U CN 203561372 U CN203561372 U CN 203561372U
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- compartment
- process variable
- electronic device
- device carrier
- housing
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Abstract
The utility model provides a process variable transmitter with a dual-compartment housing; the process variable transmitter is used in industrial control or monitoring process, and comprises a housing; a cavity is formed in the housing and extends between a first opening and a second opening; the transmitter also comprises a process variable sensor configured to sense the process variable in the industrial process. An electronic element carrier assembly is arranged in the cavity and configured in the cavity to limit a first compartment and a second compartment, and sealing effect is provided between the first and second compartments; a measuring circuit is carried by the electronic element carrier assembly in the first compartment, and configured to receive and output a process variable signal; an electric connecting portion is carried by the electronic element carrier assembly in the second compartment, and electrically connected with an output end of the measuring circuit.
Description
Technical field
The utility model relates to a kind of industrial process and controls or supervisory system.Especially, the utility model relates to the process variable transmitter that is configured to sensed process in this system.
Background technology
Process variable transmitter is used in industrial process control environment.This transmitter is connected to process fluid so that the measurement that relates to this process to be provided.Process variable transmitter can be configured to for example, the relevant one or more process variable of fluid in monitoring and process device (, mud, liquid, chemical vapors and gas, oil, gas, medicine, things and other fluid treating plants).Exemplary monitored process variable comprises other characteristics of pressure, temperature, flow, liquid level, pH value, conductivity, turbidity, density, concentration, chemical composition or fluid.Typically, process variable transmitter is arranged on remote location, conventionally afield in, and information is sent to concentrated position, for example pulpit.Process variable transmitter is sensed process in various application (comprising oily gentle refining, chemicals storage vault or chemical processing plant).Under many circumstances, this requires process variable transmitter to be arranged in harsh environment.
The process variable transmitter of some type comprises and is divided into two independently housings of compartment.A compartment comprises circuit, and another compartment comprises for being connected to the termination box of process control loop.A kind of this structure is shown in No. 5546804 United States Patent (USP).As shown in it, this structure comprises and is divided into two independently housings of compartment.
Summary of the invention
The utility model provides a kind of process variable transmitter being used in Industry Control or monitor procedure, and this transmitter comprises housing, in this housing, is formed with chamber, and extend between the first and second openings in described chamber.This transmitter also comprises process variable sensor, and described sensor is configured to the process variable of sensing industrial process.Electronic device carrier assembly is installed in described chamber and is configured to limit the first compartment and the second compartment and between in described chamber provides sealing.Metering circuit is carried and is configured to receiving course variable signal and output is provided by described electronic device carrier assembly in the first compartment.Electrical connection section is carried by described electronic device carrier assembly in the second compartment, and is electrically connected to the output terminal of described metering circuit.
Accompanying drawing explanation
Fig. 1 shows according to the figure of the viewgraph of cross-section of the process variable transmitter that comprises the first and second compartments of an embodiment of the utility model.
Fig. 2 is the exploded view of the process variable transmitter of Fig. 1.
Fig. 3 similarly schemes with Fig. 1, and it has embolus, shows the sealing in the shell of transducer of Fig. 1.
Fig. 4 shows the viewgraph of cross-section of the shell of transducer of another example seal.
Fig. 5 is the front elevation of the transmitter of Fig. 1, shows termination box and connects.
Fig. 6 shows the sketch of circuit of the transmitter of Fig. 1.
Embodiment
The utility model provides a kind of process variable transmitter being used in industrial process, comprises the housing that is divided into two compartments.Two compartments are limited by electronic device carrier assembly, and electronic device carrier assembly carrying metering circuit also provides sealing between two compartments.
Fig. 1 shows that the industrial process of the process fluid of industrial process is controlled or the sketch of supervisory system 10 for monitoring or being controlled at.Typically, process variable transmitter 12 is arranged on the remote location place of former Yezhong, and to concentrating the pulpit 14 of location to beam back the process variable sensing.Various technology are used to process of transmitting variable, comprise wired and radio communication.A kind of known general cable communicating technology is two-wire process control loop 16, and wherein, couple of conductor is used to the information of simultaneously transporting and powers to transmitter 12.A kind of technology that transmits information is for to be controlled at the levels of current in process control loop 16 between 4mA to 20mA.Current value within the scope of 4-20mA can be mapped to the analog value of process variable.Exemplary digital communication protocol comprises
(by digital communication signal, being appended to the mixing Physical layer forming in the 4-20mA simulating signal of standard), FOUNDATION
tMfieldbus (the all-digital communication agreement that Instrument Society Of America promulgated in 1992), Profibus communication protocol, or other.Wireless protocols, for example, comprise
twireless radio-frequency communication technology also can be used.
According to an embodiment, process variable transmitter 12 comprises probe 14, and probe 14 extends into process pipeline 18 and is configured for the process variable of the process fluid in measuring process pipeline 18.Exemplary process variable comprises pressure, temperature, flow, liquid level, pH value, conductivity, turbidity, density, concentration, chemical composition etc.Process variable transmitter 12 comprises housing 20, and housing 20 has the chamber 40 being positioned at wherein, and extend between a plurality of circular opens of relative end of housing 20 that are configured to receive end cap 24 and 26 in chamber 40. End cap 24 and 26 is threadingly attached to housing 20.In one embodiment, transmitter 12 comprises display circuit 22, and it is sealed in chamber 40 by end cap 24.
Single compartment process variable transmitter is known.This transmitter typically has the electronic module that is carried on transmitter rubber disc (puck), and wherein rubber disc is arranged in the housing that comprises terminals.Yet in single compartment structure, when cover removes, internal electronic element and other special-purpose members are exposed in process environment.Therefore, some prior aries structure is used two compartments structures, and wherein, shell of transducer is divided into the first compartment and the second compartment by next door, and next door is integrated with housing and be formed parts together with housing.
As shown in Figure 1, transmitter 12 comprises the electronic device carrier assembly 30 being arranged in chamber 40.In such an embodiment, electronic device carrier 30 comprises terminal cover 27, and terminal cover 27 defines the first compartment 50 and the second compartment 52 and sealing is provided between the two in chamber 40.Metering circuit 23 is carried in the first compartment 50 by electronic device carrier assembly 30.Metering circuit 23 is configured for reception from the process variable signal of process variable sensor and output is provided.Electrical connection section (not shown) is carried in the second compartment 52 by terminal cover 27 and is used to for example be connected to process fluid rate-of-change sensor, such as the temperature sensor carrying in probe 14.Electrical connection section is connected to metering circuit 23 and provides transmitter to export on process control loop 16 by electric.
Sealing is arranged between the lip 34 and housing 20 of electronic device carrier assembly 30, and seals the first compartment 50 and make it to separate with the second compartment 52.Sealing can, by using the encapsulant of encapsulation between electronic device carrier 30 and housing 20 to form, maybe can form by other technologies.Sealing material can for example, by being suitable for providing the material (rubber) of gas-tight seal to make.In one embodiment, sealing comprises around encircling against the O shape arranging in the interior week of housing 20.In using the structure of O shape ring, sealing can be fixed in the lip 34 and the position between housing 20 of electronic device carrier 30 by use fixed mechanism (such as screw etc.).
Fig. 2 is the exploded view of an embodiment of process variable transmitter 12, has described housing 20, display 22, end cap 24 and 26 and electronic device carrier assembly 30.As shown in Figure 2, electronic device carrier assembly 30 comprises metering circuit 23, display interface lid 25 and terminal cover 27.Terminal cover 27 provides physical barriers between compartment 50 and 52.Between metering circuit 23 is sandwiched in and covers 25 and 27 and be arranged in the first compartment 50.Display circuit 22 can for example be configured to insert in display interface lid 25, as shown in Figure 2.For example, member can be included in provides the multi-line connector of electrical connection and can be received in terminal cover 25 so that hard-wired pin (feet) to be provided between them.The interconnection technique of replaceability can be used, for example, and screw, bonding agent etc.As more detailed description hereinafter, carrier module 30 has flange configuration and in the interior formation sealing of housing 20, the chamber in housing 20 is divided into two separated compartments 50,52.Fig. 2 has also described selectable transient protection circuit 29, and it can be installed to terminal cover 27.Circuit 29 for example can prevent from the transition of process control loop 16 or prevent that other connecting portions from entering metering circuit 23.
Fig. 3 shows transmitter 12 and comprises the insertion section by 100 expressions, and this insertion section has been described the sealing of the formation between the lip 34 of electronics bearing assembly 30 and the lip 60 of housing 20 better.Lip 34 presses housing lip 60 by carrier lip 102.The O-ring gasket 104 between lip 60 and lip 34 has also been described to be arranged in insertion section 100.Fig. 4 is the viewgraph of cross-section of another exemplary embodiment of transmitter 12, and it has used the discoidal packing ring 104 in part being arranged between housing lip 60 and the lip 34 of electronic device carrier 30.In addition, in Fig. 4, between the terminal (as shown in Figure 25) of shown electrical connection section 105 in the second compartment 52 and metering circuit 23, extend.
Fig. 5 is the front elevation of transmitter 12, shows the terminal 120 that is arranged in compartment 52.Terminal 120 be stated from the compartment 52 in the termination box side of electronic device carrier assembly 30 and be configured to be connected to process control loop 16.This termination box side of electronic device carrier assembly 30 is also preferably carried and is configured to be connected to the sensor terminal 130 such as being carried on the process variable sensor 154 (not shown in Fig. 5) of the temperature sensor on probe 14.In the structure shown in Fig. 5, the termination box side of carrier 30 as one kind can by remove cover 26 and in compartment 52 access, without metering circuit 23 or display circuit 22 are exposed to process environment.This allows operator's access sensors hole 133, can be electrically connected to terminal 130 and hole, loop 135, thereby connector 120 can be connected to process control loop 16 thereby be connected to probe 14 line.Hole 133 and 135 is formed through the opening of housing 20.Fig. 5 has also described screw 132, and screw 132 is used to electronic device carrier assembly 30 to be fixed in housing 20.Screw 132 is used to apply installing force to lip 60 and 102, thereby provides airtight sealing between compartment 50 and 52.
Fig. 6 is the calcspar of simplification of an exemplary embodiment of process variable transmitter, and it illustrates in greater detail metering circuit 23.As shown in Figure 6, metering circuit 23 is arranged in the first compartment 50 and comprises the microprocessor 150 operating according to the instruction of carrying in storer 152.Microprocessor 150 is connected to process variable sensor 154 by analog to digital converter 156 and the sensor terminal 130 being arranged in the second compartment 52.Sensor 154 can be to comprise for example process variable sensor of any type of temperature sensor.Microprocessor 150 is connected to two-wire process control loop 16 by input/output circuitry 160 and the terminal 120 being arranged in compartment 50.I/O circuit 160 is configured for generating equally to power to circuit 22,23, and wherein electricity comes from two-wire process control loop 16.
As shown in Figure 6, electronic device carrier assembly 30 is divided into compartment 50 and 52 by shell of transducer 20.Metering circuit 23 and selectable display circuit 22 are arranged in chamber 50, and terminal 120,130 is arranged in compartment 52.As mentioned above, end cap 26 can remove from shell of transducer 20, thereby terminal 120,130 and compartment 52 can be accessed by operator.For example, can be used for like this by hole, loop, transmitter 12 being connected to two-wire process control loop 16 and by gauge hole 133, metering circuit 23 being connected to process variable sensor 154.
Although the utility model has been made description in conjunction with the preferred embodiments, those skilled in the art will recognize, under the prerequisite that does not depart from essence of the present utility model and scope, can make in form and details variation.Electronic device carrier can be made by any suitable material.In a kind of special embodiment, electronic device carrier is made of plastics and housing 20 and end cap 24,26 for example, are made by metal (aluminium of die casting).Metering circuit 23 can be connected to selectable display 22.In this structure, end cap 24 can be configured to comprise transparent region, thereby can see display from the outside of shell of transducer 20.Although described O shape ring, packing ring and airtight and watertight padding, suitable Sealing Technology can be used the sealing to the inwall of housing 20 for electronic device carrier 30 arbitrarily.In example described here, the circumferential lip 102 of electronic device carrier 30 is urged the circumferential lip 60 that abuts against housing 20, so that sealing to be provided between the two.Sealing prevents that harsh environmental element (such as liquid, dust and dirt etc.) from arriving at the electronic circuit of carrying in compartment 50.Metering circuit 23 can or can be directly installed together with electronic device carrier by independent component load-bearing.In an example, the connecting portion that extends through carrier module 30 is by forming with the molded brass pin of plastic overmold.This does not need extra cold junction compensation while being configured in employing thermocouple sensor.
Claims (14)
1. be used in the process variable transmitter in industrial process, comprise:
Housing, is formed with chamber in this housing, and extend between the first and second openings in described chamber;
Process variable sensor, it is configured to the process variable of sensing industrial process;
Electronic device carrier assembly, it is installed in described chamber and is configured to limit the first compartment and the second compartment and provide sealing between the first compartment and the second compartment in described chamber;
Metering circuit, it is carried by described electronic device carrier assembly in the first compartment, and is configured for reception from the process variable signal of process variable sensor and output is provided; With
Electrical connection section, it is carried by described electronic device carrier assembly in the second compartment, and is electrically connected to the output terminal of described metering circuit, and described electrical connection section provides transmitter output;
Packing ring, is arranged between described electronic device carrier assembly and described housing.
2. process variable transmitter according to claim 1, wherein, described sealing is formed between the lip and the lip of housing on electronic device carrier assembly.
3. process variable transmitter according to claim 1, wherein, described electronic device carrier assembly comprises plastics.
4. process variable transmitter according to claim 1, also comprises the encapsulant being seated between described electronic device carrier assembly and described housing.
5. process variable transmitter according to claim 1, also comprises the O shape ring between described electronic device carrier assembly and described housing.
6. process variable transmitter according to claim 1, is also included in the display that is connected to metering circuit in the first compartment.
7. process variable transmitter according to claim 6, wherein, described display is installed to described electronic device carrier assembly.
8. process variable transmitter according to claim 1, comprises that being configured for the described electronic device carrier assembly of pushing makes it the mounting screw against described housing.
9. process variable transmitter according to claim 1, is included in the second compartment and is carried on the sensor connector on described electronic device carrier assembly, and this sensor connector is configured to described metering circuit to be electrically connected to described process variable sensor.
10. process variable transmitter according to claim 1, wherein, described process variable sensor comprises temperature sensor.
11. process variable transmitters according to claim 1, comprise rubber washer, and this rubber washer is arranged between electronic device carrier assembly and housing and is configured to provides sealing between the first compartment and the second compartment.
12. process variable transmitters according to claim 1, wherein, described housing comprises the gauge hole that can enter the second compartment.
13. 1 kinds of process variable transmitters that are used in industrial process, comprising:
Chamber, extend between the first and second openings of housing in described chamber;
Electronic device carrier device, it is for limiting the first compartment and the second compartment in described chamber;
Packoff, thus it is for being sealed to described housing by described electronic device carrier device and making the first compartment and the second compartment sealing separates;
Sensing apparatus, it is for the process variable of sensing industrial process;
Receiving trap, it is for receiving the process transmitter variable sensing at the first compartment; With
Generator, its electrical connection section being arranged in the second compartment by use provides transmitter output and is electrically connected to described receiving trap.
14. process variable transmitters according to claim 13, comprise the electrical connector that is connected to sensing apparatus, and wherein said electrical connector is arranged in the second compartment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320613153.4U CN203561372U (en) | 2013-09-30 | 2013-09-30 | Process variable transmitter with dual-compartment housing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320613153.4U CN203561372U (en) | 2013-09-30 | 2013-09-30 | Process variable transmitter with dual-compartment housing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203561372U true CN203561372U (en) | 2014-04-23 |
Family
ID=50511087
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320613153.4U Expired - Fee Related CN203561372U (en) | 2013-09-30 | 2013-09-30 | Process variable transmitter with dual-compartment housing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203561372U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105593646A (en) * | 2013-09-30 | 2016-05-18 | 罗斯蒙特公司 | Process variable transmitter with dual compartment housing |
| CN105737860A (en) * | 2014-12-08 | 2016-07-06 | 微动公司 | Transmitter and assembling method thereof |
| CN112639413A (en) * | 2018-08-09 | 2021-04-09 | 高准公司 | Explosion-proof feed-through |
-
2013
- 2013-09-30 CN CN201320613153.4U patent/CN203561372U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105593646A (en) * | 2013-09-30 | 2016-05-18 | 罗斯蒙特公司 | Process variable transmitter with dual compartment housing |
| CN105737860A (en) * | 2014-12-08 | 2016-07-06 | 微动公司 | Transmitter and assembling method thereof |
| CN105737860B (en) * | 2014-12-08 | 2018-05-25 | 微动公司 | Transmitter and its assemble method |
| CN112639413A (en) * | 2018-08-09 | 2021-04-09 | 高准公司 | Explosion-proof feed-through |
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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 |
Granted publication date: 20140423 Termination date: 20200930 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |