CN209745334U - Temperature-pressure-flow integrated Pitot flowmeter - Google Patents

Temperature-pressure-flow integrated Pitot flowmeter Download PDF

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Publication number
CN209745334U
CN209745334U CN201920712031.8U CN201920712031U CN209745334U CN 209745334 U CN209745334 U CN 209745334U CN 201920712031 U CN201920712031 U CN 201920712031U CN 209745334 U CN209745334 U CN 209745334U
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temperature
pressure
connecting block
acquisition device
interface
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CN201920712031.8U
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赵海升
邓大云
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Beijing Consideration Measuring And Controlling Equipment Co Ltd
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Beijing Consideration Measuring And Controlling Equipment Co Ltd
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Abstract

the utility model relates to a temperature-pressure flow integrated skin-support type flowmeter, which comprises a connecting block, a measuring head, a temperature acquisition device, a pressure acquisition device and a flow calculation module, wherein the connecting block is arranged above the measuring head, the lower surface of the connecting block is respectively provided with a positive pressure inlet and a negative pressure inlet, and the positive pressure inlet and the negative pressure inlet are respectively communicated with a positive pressure taking hole and a negative pressure taking hole on the measuring head through pressure guide pipes; the side surface of the connecting block is respectively provided with a pressure outlet and a temperature interface I, and the pressure outlet is communicated with the negative pressure inlet; the temperature acquisition device and the pressure acquisition device are respectively arranged at the first temperature interface and the pressure outlet and are respectively connected with the flow calculation module through lines. The beneficial effects of the utility model are that integrated flow transmitter, pressure transmitter and temperature sensor in a whole, small, simple to operate, labour saving and time saving has practiced thrift the cost, and measurement accuracy improves greatly.

Description

Temperature-pressure-flow integrated Pitot flowmeter
Technical Field
The utility model relates to a flow detection technical field of closed conduit steam, flue gas, coal gas, natural gas etc. among enterprises such as oil, natural gas, chemical industry, steel, electric power, heat supply, concretely relates to temperature and pressure flow integration skin holds in palm formula flowmeter.
Background
Large-caliber gas (gas, air, flue gas, and steam) flow measurement has always been the focus of energy metering in industrial enterprises. In actual industrial production, the temperature and the pressure of the media are constantly changed, so the temperature and the pressure of the media must be measured to realize accurate flow measurement, and the temperature and the pressure are compensated. In application of the traditional flowmeter, a user needs to additionally install independent equipment such as a differential pressure transmitter, a temperature detection element and the like on a use site, and the installation of the field discrete components can bring a large flow measurement error; meanwhile, the equipment cost, the installation period and the construction cost of a user are greatly increased.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a temperature and pressure flow integration skin holds in palm formula flowmeter is provided, integrated flow transmitter, pressure transmitter and temperature sensor in a whole, small, simple to operate, labour saving and time saving has practiced thrift the cost, and measurement accuracy improves greatly.
the utility model provides an above-mentioned technical problem's technical scheme as follows:
A temperature-pressure-flow integrated Pitot flowmeter comprises a connecting block, a measuring head, a temperature acquisition device, a pressure acquisition device and a flow calculation module, wherein the connecting block is arranged above the measuring head, the lower surface of the connecting block is provided with a positive pressure inlet and a negative pressure inlet respectively, and the positive pressure inlet and the negative pressure inlet are communicated with a positive pressure taking hole and a negative pressure taking hole in the measuring head respectively through pressure guide pipes; a pressure outlet and a first temperature interface are respectively arranged on the side surface of the connecting block, and the pressure outlet is communicated with the negative pressure inlet; the temperature acquisition device and the pressure acquisition device are respectively arranged at the first temperature interface and the pressure outlet and are respectively connected with the flow calculation module through lines.
The utility model has the advantages that: in the measuring process, only one small hole needs to be formed in the pipeline, then the measuring head of the Pitot-type flowmeter is inserted into the pipeline, the special structure of the connecting block is utilized, the temperature acquisition device and the pressure acquisition device are respectively communicated with the pipeline, the temperature signal and the pressure signal of the medium in the pipeline are respectively acquired by the temperature acquisition device and the pressure acquisition device, the corresponding temperature signal and the corresponding pressure signal are respectively sent to the flow calculation module, and therefore the flow of the medium in the pipeline is calculated. The utility model discloses integrateed flow transmitter, pressure transmitter and temperature sensor in a whole, small, simple to operate, labour saving and time saving has practiced thrift the cost, and measurement accuracy improves greatly.
On the basis of the technical scheme, the utility model discloses can also do following improvement.
Furthermore, two differential pressure outlets are arranged on the upper surface of the connecting block, and the two differential pressure outlets are respectively communicated with the positive pressure inlet and the negative pressure inlet; supreme three valves and differential pressure transmitter of being equipped with in proper order are followed to the top of connecting block, two pressure inlets of three valves lower extreme respectively with two differential pressure outlet intercommunication, last two entrances of differential pressure transmitter respectively with two pressure outlet intercommunications of three valves upper end, differential pressure transmitter pass through the circuit with flow calculation module connects.
the flow differential pressure value generated by the measuring head of the Pitot flowmeter can be accurately measured by the differential pressure transmitter, and the differential pressure value is converted into a 4-20mA current signal and transmitted to the flow calculation module; meanwhile, the three valve groups are matched, so that zero calibration can be conveniently carried out on the differential pressure transmitter, and the accuracy of measurement is ensured.
Furthermore, the temperature acquisition device comprises a temperature transmitter and a temperature sensor, wherein the temperature transmitter is connected to the first temperature interface and is connected with the flow calculation module through a line; and a temperature interface II communicated with the temperature interface I is further arranged on the lower surface of the connecting block, and the temperature sensor is arranged at the temperature interface II and is connected with the temperature transmitter through a line.
The beneficial effect of adopting above-mentioned further scheme is that through the real-time temperature of temperature sensor detection pipeline in medium to give temperature transmitter with corresponding temperature signal transmission, then temperature transmitter sends the temperature signal who corresponds for flow calculation module, measures accurately.
Further, the temperature sensor includes a thermal resistive core.
The beneficial effect who adopts above-mentioned further scheme is thermal resistance core stable performance, measures more accurately.
Furthermore, the temperature acquisition device also comprises a temperature sleeve, the temperature sleeve is sleeved outside the temperature sensor, one end of the temperature sleeve is fixedly connected with the temperature interface II, and the other end of the temperature sleeve is fixedly connected with the measuring head.
The beneficial effect who adopts above-mentioned further scheme is on the one hand through temperature sleeve protection temperature sensor, and on the other hand passes through temperature sleeve and connects gauge head and connecting block.
Furthermore, the temperature sleeve and the two pressure guide pipes are sleeved with outer pipes.
The beneficial effect who adopts above-mentioned further scheme is regular, neat pleasing to the eye to temperature sleeve pipe and two pressure pipes through the outer tube.
Further, still be equipped with on the upper surface of connecting block and be used for with temperature sensor inserts the threaded interface in the temperature sleeve, threaded interface is located directly over temperature interface two, and with temperature interface two intercommunication, threaded connection has the sealing member at threaded interface department.
The adoption of the further scheme has the advantages that the threaded interface is arranged, so that the thermal resistance core is conveniently inserted into the temperature sleeve during installation, and the operation is simple and convenient; the threaded interface is sealed through the sealing piece, and the condition of medium leakage is avoided.
Further, the sealing element is a plug.
The beneficial effects of adopting above-mentioned further scheme are that simple structure, easy dismounting, sealed effect preferred.
further, the pressure acquisition device is a pressure sensor.
The beneficial effect of adopting above-mentioned further scheme is that sensitivity is high, measures accurately.
Drawings
Fig. 1 is a front view of the overall structure of the present invention;
FIG. 2 is a right side view of the overall structure of the present invention;
Fig. 3 is a bottom view of the connecting block of the present invention;
FIG. 4 is a cross-sectional view taken along line A-A of FIG. 3;
Fig. 5 is a bottom view of the connecting block of the present invention;
fig. 6 is a schematic structural view of the three valve sets of the present invention;
Fig. 7 is a circuit block diagram of the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
1. The device comprises a connecting block, 2, a measuring head, 3, a flow calculation module, 4, a positive pressure inlet, 5, a negative pressure inlet, 6, a pressure guide pipe, 7, a pressure outlet, 8, a first temperature interface, 9, a differential pressure outlet, 10, a third valve group, 11, a differential pressure transmitter, 12, a temperature transmitter, 13, a temperature sensor, 14, a second temperature interface, 15, a temperature sleeve, 16, a sealing element, 17, a pressure sensor, 18 and an outer pipe.
Detailed Description
The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.
as shown in fig. 1 to 7, the utility model provides a warm pressure flows integration skin formula flowmeter, including connecting block 1, gauge head 2, temperature acquisition device, pressure acquisition device and flow calculation module 3, connecting block 1 sets up the top at gauge head 2, be equipped with malleation import 4 and negative pressure import 5 on its lower surface respectively, malleation import 4 and negative pressure import 5 are respectively through pressure pipe 6 and gauge head 2 on positive pressure taking hole and the negative pressure taking hole intercommunication, one of them pressure pipe 6's both ends respectively with positive pressure taking hole and positive pressure import 4 welding, another pressure pipe 6's both ends respectively with negative pressure taking hole and negative pressure import 5 welding, ensure the leakproofness. The side surface of the connecting block 1 is respectively provided with a pressure outlet 7 and a temperature interface I8, and the pressure outlet 7 is communicated with the negative pressure inlet 5; the temperature acquisition device and the pressure acquisition device are respectively arranged at the first temperature interface 8 and the pressure outlet 7 and are respectively connected with the flow calculation module 3 through lines; the pressure acquisition device preferably adopts the pressure sensor 17, the sensitivity of the pressure sensor 17 is high, and the measurement is accurate; in addition, the temperature acquisition device and the pressure sensor 17 are respectively mounted on the corresponding positions of the connection block 1 by means conceivable to those skilled in the art, such as welding or screwing. In the measuring process, only one small hole needs to be formed in the pipeline, then the measuring head 2 of the Pitot-type flowmeter is inserted into the pipeline, the special structure of the connecting block 1 is utilized, the temperature acquisition device and the pressure acquisition device are respectively communicated with the pipeline, the temperature signal and the pressure signal of a medium in the pipeline are respectively acquired by the temperature acquisition device and the pressure acquisition device, the corresponding temperature signal and the corresponding pressure signal are respectively sent to the flow calculation module 3, and therefore the flow of the medium in the pipeline is calculated. The utility model discloses integrated temperature acquisition device and pressure acquisition device in a whole, small, simple to operate, labour saving and time saving has practiced thrift the cost, and measurement accuracy improves greatly.
It should be noted that the flow calculating module 3 is a flow calculator, and the flow calculator receives the temperature signal and the pressure signal sent by the temperature collecting device and the pressure collecting device, and converts the temperature signal and the pressure signal into digital signals, respectively, so as to calculate the flow of the medium in the pipeline. The flow calculator and the program for calculating the flow therein are all in the prior art.
in the utility model, two differential pressure outlets 9 are arranged on the upper surface of the connecting block 1, and the two differential pressure outlets 9 are respectively communicated with the positive pressure inlet 4 and the negative pressure inlet 5; a three-valve group 10 and a differential pressure transmitter 11 are sequentially arranged above the connecting block 1 from bottom to top, two pressure inlets at the lower end of the three-valve group 10 are respectively communicated with two differential pressure outlets 9, and two inlets on the differential pressure transmitter 11 are respectively communicated with two pressure outlets at the upper end of the three-valve group 10; three valves 10 are respectively connected with connecting block 1 and differential pressure transmitter 11 through bolts, and connecting block 1, three valves 10 and differential pressure transmitter 11 are respectively provided with screw holes matched with bolts. The differential pressure transmitter 11 is connected with the flow calculation module 3 through a line (a connecting line between the two is the prior art), the differential pressure transmitter 11 converts a differential pressure signal generated by the measuring head 2 into a 4-20mA current signal and sends the 4-20mA current signal to the flow calculation module 3, a differential pressure value measured by the differential pressure transmitter 11 and the square of the flow velocity of a medium in a pipeline are in a linear relation (P is kV2+ b), and the flow of the medium in the pipeline is calculated by using the measured differential pressure; meanwhile, the three valve groups 10 are matched, so that zero calibration can be conveniently carried out on the differential pressure transmitter 11, and the accuracy of measurement is ensured.
Example 1
On the basis of the structure, the temperature acquisition device in the embodiment comprises a temperature transmitter 12 and a temperature sensor 13, wherein the temperature transmitter 12 is connected to the first temperature interface 8 and is connected with the flow calculation module 3 through a line; the lower surface of the connecting block 1 is also provided with a second temperature interface 14 communicated with the first temperature interface 8, and the temperature sensor 13 is installed at the second temperature interface 14 and is connected with the temperature transmitter 12 through a line. The real-time temperature of the medium in the pipeline is detected through the temperature sensor, the corresponding temperature signal is sent to the temperature transmitter 12, then the temperature transmitter sends the corresponding temperature signal to the flow calculation module 3, and the measurement is accurate.
Preferably, in this embodiment, the temperature sensor 13 is preferably a class a PT100 thermal resistor core, the resistance value of the thermal resistor core is closely related to the temperature, the resistance value of the thermal resistor core decreases with the temperature increase, and the thermal resistor core measures the temperature, which belongs to the prior art; the thermal resistance core has stable performance and more accurate measurement. The temperature sensor 13 may also be a thermocouple, which is a temperature measuring element commonly used in a temperature measuring instrument, and directly measures temperature, converts a temperature signal into a thermal electromotive force signal, and converts the thermal electromotive force signal into the temperature of a measured medium through an electric instrument.
Example 2
On the basis of the first embodiment, the temperature acquisition device in this embodiment further includes a temperature sleeve 15, the temperature sleeve 15 is sleeved outside the temperature sensor 13, one end of the temperature sleeve 15 is fixedly connected (welded) with the second temperature interface 14, and the other end of the temperature sleeve is fixedly connected (welded) with the measuring head 2. The temperature sensor 13 is completely enclosed in a temperature jacket 15, on the one hand the temperature sensor 13 is protected by the temperature jacket 15, and on the other hand the measuring head 2 and the connecting block 1 are connected by the temperature jacket 15.
Example 3
On the basis of the second embodiment, in the second embodiment, the outer pipe 18 is sleeved outside the temperature sleeve 15 and the two pressure guiding pipes 6, and the temperature sleeve 15 and the two pressure guiding pipes 6 are orderly and attractive through the outer pipe 18.
Example 4
on the basis of the second embodiment, a threaded interface for inserting the temperature sensor 13 into the temperature sleeve 15 is further arranged on the upper surface of the connection block 1 in the second embodiment, the threaded interface is located right above the second temperature interface 14 and is communicated with the second temperature interface 14, and a sealing element 16 is connected to the threaded interface in a threaded manner. The threaded interface is arranged, so that the thermal resistor core can be inserted into the temperature sleeve 15 during installation, and the operation is simple and convenient; the threaded interface is sealed by the sealing piece 16, so that the medium leakage is avoided; the sealing element 16 is preferably a pipe plug, the structure is simple, the assembly and disassembly are convenient, the sealing effect is good, and the sealing element 16 can also be a rubber sealing plug.
The utility model provides a pitot-type flowmeter compares with the pitot-type flowmeter among the prior art, has following advantage:
Firstly, the flowmeter integrates the differential pressure transmitter 11, the temperature acquisition device and the pressure acquisition device, so that a user does not need to purchase any other equipment; meanwhile, installation errors caused by independent installation of the components of the differential pressure transmitter 11, the temperature acquisition device and the pressure acquisition device in the traditional scheme are eliminated, and the measurement precision is improved;
Secondly, when the user installs, only need open 1 mounting hole on the pipeline, just can accomplish differential pressure transmitter 11, temperature acquisition device and pressure acquisition device's installation simultaneously, reduced the installation cost, practiced thrift installation time.
It should be noted that the utility model relates to a differential pressure transmitter (model TY-3051), three valves (model QFF3), thermal resistor core (model WZPK-010) and pressure sensor (model YZC-516C) all adopt prior art to above-mentioned each part is connected with flow calculation module (model SLFC300 or SLFU400) electricity, and the control circuit between flow calculation module and each part is prior art.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims (9)

1. The utility model provides a temperature pressure flows integration pitot-type flowmeter which characterized in that: the measuring head comprises a connecting block (1), a measuring head (2), a temperature collecting device, a pressure collecting device and a flow calculating module (3), wherein the connecting block (1) is arranged above the measuring head (2), the lower surface of the connecting block is provided with a positive pressure inlet (4) and a negative pressure inlet (5), and the positive pressure inlet (4) and the negative pressure inlet (5) are respectively communicated with a positive pressure taking hole and a negative pressure taking hole in the measuring head (2) through pressure guide pipes (6); a pressure outlet (7) and a temperature interface I (8) are respectively arranged on the side surface of the connecting block (1), the pressure outlet (7) is communicated with the negative pressure inlet (5), and the temperature interface I (8) is communicated with the positive pressure inlet (4); the temperature acquisition device and the pressure acquisition device are respectively arranged at the first temperature interface (8) and the pressure outlet (7) and are respectively connected with the flow calculation module (3) through lines.
2. The temperature and pressure flow integrated pitot-type flowmeter of claim 1, characterized in that: two differential pressure outlets (9) are arranged on the upper surface of the connecting block (1), and the two differential pressure outlets (9) are respectively communicated with the positive pressure inlet (4) and the negative pressure inlet (5); supreme three valves (10) and differential pressure transmitter (11) of being equipped with in proper order are followed to the top of connecting block (1), two pressure inlets of three valves (10) lower extreme respectively with two differential pressure outlet (9) intercommunication, two last entries of differential pressure transmitter (11) respectively with two pressure outlet intercommunications of three valves (10) upper end, differential pressure transmitter (11) pass through the circuit with flow calculation module (3) are connected.
3. the temperature and pressure flow integrated pitot-type flowmeter of claim 1, characterized in that: the temperature acquisition device comprises a temperature transmitter (12) and a temperature sensor (13), wherein the temperature transmitter (12) is connected to the first temperature interface (8) and is connected with the flow calculation module (3) through a line; still be equipped with on the lower surface of connecting block (1) with temperature interface two (14) of temperature interface (8) intercommunication, temperature sensor (13) are installed temperature interface two (14) department, and through the circuit with temperature transmitter (12) are connected.
4. The temperature and pressure flow integrated pitot-type flowmeter of claim 3, characterized in that: the temperature sensor (13) comprises a thermal resistive core.
5. The temperature and pressure flow integrated pitot-type flowmeter of claim 3, characterized in that: the temperature acquisition device further comprises a temperature sleeve (15), the temperature sleeve (15) is sleeved outside the temperature sensor (13), one end of the temperature sleeve is fixedly connected with the second temperature interface (14), and the other end of the temperature sleeve is fixedly connected with the measuring head (2).
6. The temperature and pressure flow integrated pitot-type flowmeter of claim 5, characterized in that: the temperature sleeve (15) and the two pressure guide pipes (6) are sleeved with outer pipes (18).
7. The temperature and pressure flow integrated pitot-type flowmeter of claim 5, characterized in that: still be equipped with on the upper surface of connecting block (1) and be used for with temperature sensor (13) inserts the hickey in temperature sleeve pipe (15), the hickey is located directly over temperature interface two (14), and with temperature interface two (14) intercommunication, hickey threaded connection has sealing member (16).
8. The temperature and pressure flow integrated pitot-type flowmeter of claim 7, characterized in that: the sealing element (16) is a plug.
9. The temperature-pressure-flow integrated pitot-type flowmeter according to any one of claims 1-8, characterized in that: the pressure acquisition device is a pressure sensor (17).
CN201920712031.8U 2019-05-17 2019-05-17 Temperature-pressure-flow integrated Pitot flowmeter Active CN209745334U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201920712031.8U CN209745334U (en) 2019-05-17 2019-05-17 Temperature-pressure-flow integrated Pitot flowmeter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201920712031.8U CN209745334U (en) 2019-05-17 2019-05-17 Temperature-pressure-flow integrated Pitot flowmeter

Publications (1)

Publication Number Publication Date
CN209745334U true CN209745334U (en) 2019-12-06

Family

ID=68722882

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201920712031.8U Active CN209745334U (en) 2019-05-17 2019-05-17 Temperature-pressure-flow integrated Pitot flowmeter

Country Status (1)

Country Link
CN (1) CN209745334U (en)

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