CN210321826U

CN210321826U - Gas temperature, pressure and humidity integrated plug-in flowmeter

Info

Publication number: CN210321826U
Application number: CN201921459166.4U
Authority: CN
Inventors: 高玉娟; 孟立辉; 王月
Original assignee: Nanjing Hanhua Fluid Technology Co ltd
Current assignee: Nanjing Hanhua Fluid Technology Co ltd
Priority date: 2019-09-04
Filing date: 2019-09-04
Publication date: 2020-04-14
Anticipated expiration: 2029-09-04

Abstract

The utility model provides a gas temperature pressure humidity integration bayonet flowmeter, solves current gas metering device because of contain the moisture in the coal gas, leads to measuring error big, because the inaccurate problem that produces the dispute of measurement when the trade settles accounts. Including the flowmeter main part of constituteing by connecting the outer tube, its characterized in that: a temperature and humidity sensor is arranged in the negative pressure side current guide cavity connected with the outer pipe; the upper end of a positive pressure side diversion cavity of a pressure guiding inner pipe arranged in the connecting outer pipe is provided with a pressure sensor; the lower end of the connecting outer pipe is provided with a measuring probe, the upper end of the connecting outer pipe is connected with a connecting flange through an inner connecting pipe and a protective sleeve, a connecting valve group is arranged on a head sleeve on the flange cover, a positive pressure side flow guide cavity is communicated with a positive pressure taking port on the connecting valve group, and a negative pressure side flow guide cavity is communicated with a negative pressure taking port on the connecting valve group. The gas anti-blocking device is reasonable in design, compact in structure, small in pressure loss, good in anti-blocking effect, capable of improving the gas metering accuracy, capable of achieving long-term stable measurement of gas and convenient to maintain.

Description

Gas temperature, pressure and humidity integrated plug-in flowmeter

Technical Field

The utility model belongs to the technical field of gas flow measuring device, concretely relates to loss of pressure is little, prevents blockking up effectually, can improve the coal gas measurement accuracy, realizes the long-term stable measurement of coal gas, maintains convenient bayonet flowmeter of coal gas temperature pressure humidity integration.

Background

Coal gas is taken as an important power energy medium, and the metering accuracy of the coal gas is always a key problem which is difficult to solve by coal gas production enterprises. At present, the gas metering device only considers the influence of temperature and pressure in a pipeline, and the gas flow is corrected through temperature and pressure compensation before the flow is output. However, the moisture contained in the gas is also one of the main factors influencing the metering accuracy, and the field metering result shows that the gas humidity has great influence on the metering accuracy, which can influence to different degrees along with the change of the temperature and the pressure in the pipeline. Therefore, the existing gas metering device has large measurement error due to moisture contained in gas, disputes are often generated due to inaccurate gas metering during trade settlement, and the problem of unbalanced gas pipe network flow cannot be solved. There is a need for an improved prior art plug-in flow meter for gas flow metering.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to above-mentioned problem, it is little to provide a loss of pressure, prevents blockking up effectually, can improve the coal gas measurement degree of accuracy, realizes the long-term stable measurement of coal gas, maintains convenient bayonet flowmeter of coal gas temperature pressure humidity integration.

The utility model adopts the technical proposal that: this bayonet flowmeter of coal gas temperature pressure humidity integration includes the flowmeter main part, its characterized in that: the flowmeter main body is composed of a connecting outer pipe, a negative pressure side flow guide cavity is arranged inside the connecting outer pipe, and a temperature and humidity sensor is arranged in the negative pressure side flow guide cavity; a pressure guiding inner pipe is also arranged inside the connecting outer pipe, a positive pressure side flow guide cavity is arranged inside the pressure guiding inner pipe, and a pressure sensor is arranged at the upper end of the positive pressure side flow guide cavity; the lower end of the outer connecting pipe of the flowmeter main body is provided with a measuring probe, the outer side of the upper end of the outer connecting pipe is provided with an inner connecting pipe extending upwards, the outer side of the inner connecting pipe is provided with a protective sleeve, the upper end of the outer connecting pipe is hermetically connected with a through hole in a connecting flange through the inner connecting pipe and the protective sleeve, and a flange cover is arranged above the connecting flange; the top of blind flange is provided with the head sleeve pipe, and the sheathed tube upper end of head is provided with the connecting valve group, and the front side of connecting valve group is provided with the malleation and gets pressure mouth and negative pressure and get pressure mouth, the upper end that draws the pressure inner tube links to each other with the entry of connecting valve group downside, and the malleation side water conservancy diversion chamber that draws the pressure inner tube gets pressure mouth with the malleation on the connecting valve group and be linked together, the negative pressure side water conservancy diversion chamber of connecting the outer tube then gets pressure mouth with the negative pressure on the connecting valve.

The measuring probe is composed of a probe main body with a hollow structure, and a positive pressure side through hole and a negative pressure side through hole which are isolated from each other are respectively arranged in the probe main body; the positive pressure side through hole of the measuring probe is communicated with the lower end of the positive pressure side flow guide cavity of the pressure guiding inner tube, and the negative pressure side through hole of the measuring probe is communicated with the lower end of the negative pressure side flow guide cavity of the connecting outer tube. The measured differential pressure signal is transmitted from the positive pressure taking port and the negative pressure taking port of the connecting valve group respectively through the positive pressure side diversion cavity and the negative pressure side diversion cavity inside the connecting outer pipe.

The lower extreme of the malleation side through-hole of measuring probe is provided with the oval inlet that the slant was arranged, and the lower extreme of the negative pressure side through-hole of measuring probe also is provided with the oval inlet that the slant was arranged. The area of the inflow opening is effectively increased by the oval oblique section structure of the positive pressure side through hole and the negative pressure side through hole of the measuring probe, so that the fluid is favorably gathered, the airflow differential pressure entering the two sides of the measuring probe is increased, and the measurement is facilitated.

And the connecting valve group is also provided with a reverse purging port. The plug-in flowmeter can play a good anti-blocking role when measuring the flow of dirty gas by regularly cleaning the negative pressure side flow guide cavity connected with the outer pipe and the positive pressure side flow guide cavity for guiding and pressing the inner pipe.

The positive pressure tapping port and the negative pressure tapping port arranged on the front side of the connecting valve group are connected with the differential pressure transmitter valve group through valves; the lateral pressure taking port of the connecting valve group is also provided with a pressure transmitter valve group. Transmitting the measured differential pressure signal from the positive pressure port and the negative pressure port of the connecting valve group to a differential pressure transmitter connected with the differential pressure transmitter valve group; and signals are transmitted to the pressure transmitter through the pressure transmitter valve group, so that the real pressure of the coal gas flowing in the pipeline is accurately measured, and the flow of the output coal gas is subjected to pressure compensation.

And a sealing blocking sleeve is arranged on the outer side of the connecting part of the upper end of the measuring probe and the lower end of the connecting outer pipe. So as to increase the connection fastening degree of the measuring probe and improve the sealing performance.

The utility model has the advantages that: because the utility model adopts the flowmeter main body consisting of the connecting outer pipe, the inside of the connecting outer pipe is provided with the negative pressure side diversion cavity, and the inside of the negative pressure side diversion cavity is provided with the temperature and humidity sensor; a pressure guiding inner pipe is also arranged inside the connecting outer pipe, a positive pressure side flow guide cavity is arranged inside the pressure guiding inner pipe, and a pressure sensor is arranged at the upper end of the positive pressure side flow guide cavity; the lower end of the outer connecting pipe of the flowmeter main body is provided with a measuring probe, the outer side of the upper end of the outer connecting pipe is provided with an inner connecting pipe extending upwards, the outer side of the inner connecting pipe is provided with a protective sleeve, the upper end of the outer connecting pipe is hermetically connected with a through hole on a connecting flange through the inner connecting pipe and the protective sleeve, and a flange cover is arranged above the connecting flange; the top of blind flange is provided with the head sleeve pipe, the sheathed tube upper end of head is provided with the coupling valve group, the front side of coupling valve group is provided with the malleation and gets pressure mouth and negative pressure and get pressure mouth, the upper end of drawing the pressure inner tube links to each other with the entry of coupling valve group downside, and the malleation side water conservancy diversion chamber that draws the pressure inner tube is got pressure mouth with the malleation on the coupling valve group and is linked together, the structural style that the negative pressure side water conservancy diversion chamber of connecting the outer tube is got pressure mouth and is linked together with the negative pressure on the coupling valve group, so its reasonable in design, compact structure utilizes temperature and humidity sensor respectively, the temperature of coal gas in pressure sensor and the measuring probe comes the measuring pipeline, humidity.

The utility model discloses a plug-in flowmeter's flowmeter sensor part has concentrated the real-time signal acquisition function of temperature, pressure, humidity, differential pressure, can carry out the accurate measurement to the flow that contains wet coal gas, and loss of pressure is little, prevents that the jam performance is good, can realize the long-term stable measurement of coal gas, and the maintenance volume is little. Meanwhile, the problem of large measurement error caused by moisture in the gas measurement process is effectively solved, disputes caused by inaccurate gas measurement in trade settlement can be reduced, the problem of unbalanced gas pipe network flow can be solved, and the on-line measurement of the temperature, the pressure, the humidity and the flow of the gas in the pipeline is realized.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a view in the direction a of fig. 1.

Fig. 3 is a schematic diagram of one configuration of the flowmeter body of fig. 1.

Figure 4 is a schematic diagram of one configuration of the measurement probe of figure 3.

The sequence numbers in the figures illustrate: the flowmeter comprises a flowmeter main body 1, a measuring probe 2, a protective sleeve 3, a connecting flange 4, a bolt 5, a flange cover 6, a head sleeve 7, a connecting valve group 8, a positive pressure tapping hole 9, a temperature and humidity meter 10, a negative pressure tapping hole 11, a pressure transmitter valve group 12, a back flushing port 13, a valve 14, a differential pressure transmitter valve group 15, a connecting outer pipe 16, a pressure guiding inner pipe 17, a positive pressure side flow guiding cavity 18, a negative pressure side flow guiding cavity 19, a temperature and humidity sensor 20, an inner connecting pipe 21, a pressure sensor 22, a sealing and blocking sleeve 23, a probe main body 24, a positive pressure side through hole 25, a negative pressure side through hole 26 and an oval flow inlet 27.

Detailed Description

The specific structure of the present invention is described in detail with reference to fig. 1 to 4. The integrated plug-in type gas temperature, pressure and humidity flow meter comprises a flow meter body 1 formed by a connecting outer pipe 16, a negative pressure side flow guide cavity 19 is arranged inside the connecting outer pipe 16 of the flow meter body 1, a vertically arranged temperature and humidity sensor 20 (for example, an EE150 type temperature and humidity sensor) is arranged in the negative pressure side flow guide cavity 19, the temperature and humidity sensor 20 is connected with a temperature and humidity meter head 10 arranged above a connecting valve group 8, so that the temperature and humidity of gas in a measured pipeline are displayed through the temperature and humidity meter head 10, and temperature and humidity compensation is carried out on the flow of the output gas.

A pressure guiding inner pipe 17 is also arranged inside the negative pressure side flow guiding cavity 19 of the connecting outer pipe 16, and a positive pressure side flow guiding cavity 18 is arranged inside the pressure guiding inner pipe 17; the upper end of the positive pressure side guide cavity 18 is provided with a pressure sensor 22 (for example, a 7MF40331DA102AB6-ZA01 type pressure sensor). The lower end of the connection outer tube 16 of the flowmeter body 1 is provided with the measuring probe 2, the measuring probe 2 is composed of a probe body 24 having a hollow structure, and a positive pressure side through hole 25 and a negative pressure side through hole 26 which are isolated from each other are provided in the probe body 24. A positive pressure side through hole 25 of the measuring probe 2 is communicated with the lower end of the positive pressure side flow guide cavity 18 of the pressure guiding inner tube 17, and a negative pressure side through hole 26 of the measuring probe 2 is communicated with the lower end of the negative pressure side flow guide cavity 19 of the connecting outer tube 16; the measured differential pressure signal is transmitted from the differential pressure port (the positive pressure port 9 and the negative pressure port 11) of the connection valve block 8 through the positive pressure side guide cavity 18 and the negative pressure side guide cavity 19 inside the connection outer tube 16.

The lower end of the positive pressure side through hole 25 of the measuring probe 2 is provided with an obliquely arranged oval inlet 27, and the lower end of the negative pressure side through hole 26 of the measuring probe 2 is also provided with an obliquely arranged oval inlet 27; moreover, the included angle between the two inclined planes of the oval inlet 27 at the two sides of the lower end of the measuring probe 2 is 50-70 degrees, so that the efficiency of the air flow entering the positive pressure side through hole 25 and the negative pressure side through hole 26 of the measuring probe 2 is effectively improved; and the area of the inflow opening is effectively increased through the oval oblique section structures of the positive pressure side through hole and the negative pressure side through hole of the measuring probe 2, so that the fluid is favorably gathered, the airflow differential pressure entering the two sides of the measuring probe 2 is increased, and the measurement is convenient. In order to increase the connection fastening degree of the measuring probe 2 and improve the sealing performance, a sealing plug sleeve 23 is arranged outside the connecting part of the upper end of the measuring probe 2 and the lower end of the connecting outer pipe 16.

An inner pipe 21 extending upward is provided outside the upper end of the outer connection pipe 16, and the sheath pipe 3 is provided outside the inner pipe 21. The upper end of the connecting outer pipe 16 is hermetically connected with the through hole on the connecting flange 4 through the inner connecting pipe 21 and the protective sleeve 3, and a flange cover 6 is arranged above the connecting flange 4 through a bolt 5. A head sleeve 7 for protecting the sensor is arranged above the flange cover 6, and a connecting valve group 8 for distributing and conveying gas is arranged at the upper end of the head sleeve 7; the front side of the connecting valve group 8 is provided with a positive pressure port 9 and a negative pressure port 11. The upper end of the pressure guiding inner pipe 17 is connected with the inlet on the lower side of the connecting valve group 8, the positive pressure side flow guiding cavity 18 of the pressure guiding inner pipe 17 is communicated with the positive pressure taking port 9 through the pipeline inside the connecting valve group 8, and the negative pressure side flow guiding cavity 19 of the connecting outer pipe 16 is communicated with the negative pressure taking port 11 through the pipeline inside the connecting valve group 8.

A positive pressure tapping 9 and a negative pressure tapping 11 arranged on the front side of the connecting valve group 8 are connected with a differential pressure transmitter valve group 15 through a valve 14, and a pressure transmitter valve group 12 is also arranged on the side pressure tapping of the connecting valve group 8; so that the measured differential pressure signal is transmitted from the positive pressure port 9 and the negative pressure port 11 of the connection valve group 8 to the differential pressure transmitter (for example, 7MF4433-1CA02-2AB6-Z type differential pressure transmitter) connected with the differential pressure transmitter valve group 15; and transmits signals to the pressure transmitter through the pressure transmitter valve group 12 so as to accurately measure the real pressure of the flowing coal gas in the pipeline and perform pressure compensation on the flow of the output coal gas. In order to regularly clean the negative pressure side flow guide cavity 19 connected with the outer pipe 16 and the positive pressure side flow guide cavity 18 connected with the pressure guide inner pipe 17, the connecting valve group 8 is also provided with a reverse purging port 13, so that the plug-in flowmeter can play a good anti-blocking role when measuring the flow of the dirty gas.

When in use, the integrated plug-in type flowmeter for the temperature, the pressure and the humidity of the coal gas is inserted into a pipeline through an opening on the side wall of a pipe body of the conveying pipeline, and is connected with the side wall of the pipe body through a connecting flange 4 which is connected with an inner connecting pipe 21 and a protective sleeve 3 at the upper end of a connecting outer pipe 16 in a sealing way. The air current in the pipeline enters into the positive pressure side through hole 25 and the negative pressure side through hole 26 of the measuring probe 2 respectively from the oval inflow openings 27 on the two sides of the lower end of the measuring probe 2, and the oval oblique section structures of the positive pressure side through hole 26 and the negative pressure side through hole 26 of the measuring probe 2 are utilized to effectively increase the area of the inflow openings, so that the fluid gathering is facilitated, the air current differential pressure entering the two sides of the measuring probe 2 is increased, and the measurement is facilitated. Transmitting the measured differential pressure signal from a positive pressure port 9 and a negative pressure port 11 of a connecting valve group 8 to a differential pressure transmitter connected with a differential pressure transmitter valve group 15; and transmits signals to the pressure transmitter through the pressure transmitter valve group 12 so as to accurately measure the real pressure of the flowing coal gas in the pipeline and perform pressure compensation on the flow of the output coal gas. Meanwhile, the temperature and humidity gauge head 10 connected with the temperature and humidity sensor 20 is used for displaying the temperature and humidity of the coal gas in the measured pipeline and compensating the temperature and humidity of the output coal gas flow. The integrated plug-in type gas temperature, pressure and humidity flowmeter can realize simultaneous online monitoring of gas temperature, pressure, humidity and mass flow in a pipeline, the position of a measuring point is fixed, and the accuracy of wet gas flow measurement is effectively improved.

Claims

1. The utility model provides a bayonet flowmeter of coal gas temperature pressure humidity integration, includes flowmeter main part (1), its characterized in that: the flowmeter main body (1) is composed of a connecting outer pipe (16), a negative pressure side flow guide cavity (19) is arranged inside the connecting outer pipe (16), and a temperature and humidity sensor (20) is arranged in the negative pressure side flow guide cavity (19); a pressure guide inner pipe (17) is further arranged inside the connecting outer pipe (16), a positive pressure side flow guide cavity (18) is arranged inside the pressure guide inner pipe (17), and a pressure sensor (22) is arranged at the upper end of the positive pressure side flow guide cavity (18); the lower end of a connecting outer pipe (16) of the flowmeter main body (1) is provided with a measuring probe (2), the outer side of the upper end of the connecting outer pipe (16) is provided with an inner connecting pipe (21) extending upwards, the outer side of the inner connecting pipe (21) is provided with a protective sleeve (3), the upper end of the connecting outer pipe (16) is hermetically connected with a through hole on a connecting flange (4) through the inner connecting pipe (21) and the protective sleeve (3), and a flange cover (6) is arranged above the connecting flange (4); the top of blind flange (6) is provided with head sleeve pipe (7), and the upper end of head sleeve pipe (7) is provided with coupling valve group (8), and the front side of coupling valve group (8) is provided with the malleation and gets pressure mouthful (9) and negative pressure and get pressure mouthful (11), the upper end that draws pressure inner tube (17) links to each other with the entry of coupling valve group (8) downside, and draws malleation side water conservancy diversion chamber (18) of pressing inner tube (17) and the malleation on coupling valve group (8) and get pressure mouthful (9) and be linked together, negative pressure side water conservancy diversion chamber (19) of connecting outer tube (16) then get pressure mouthful (11) with the negative pressure on coupling valve group (8) and be linked together.

2. The integrated plug-in flowmeter for gas temperature, pressure and humidity as claimed in claim 1, wherein: the measuring probe (2) is composed of a probe main body (24) with a hollow structure, and a positive pressure side through hole (25) and a negative pressure side through hole (26) which are isolated from each other are respectively arranged in the probe main body (24); the positive pressure side through hole (25) of the measuring probe (2) is communicated with the lower end of the positive pressure side flow guide cavity (18) of the pressure guide inner tube (17), and the negative pressure side through hole (26) of the measuring probe (2) is communicated with the lower end of the negative pressure side flow guide cavity (19) of the connecting outer tube (16).

3. The integrated plug-in flowmeter for gas temperature, pressure and humidity as claimed in claim 2, wherein: the lower end of the positive pressure side through hole (25) of the measuring probe (2) is provided with an oval inflow port (27) which is obliquely arranged, and the lower end of the negative pressure side through hole (26) of the measuring probe (2) is also provided with an oval inflow port (27) which is obliquely arranged.

4. The integrated plug-in flowmeter for gas temperature, pressure and humidity as claimed in claim 1, wherein: and a reverse purging port (13) is also arranged on the connecting valve group (8).

5. The integrated plug-in flowmeter for gas temperature, pressure and humidity as claimed in claim 1, wherein: a positive pressure tapping (9) and a negative pressure tapping (11) which are arranged on the front side of the connecting valve group (8) are connected with a differential pressure transmitter valve group (15) through a valve (14); the pressure taking port at the side part of the connecting valve group (8) is also provided with a pressure transmitter valve group (12).

6. The integrated plug-in flowmeter for gas temperature, pressure and humidity as claimed in claim 1, wherein: and a sealing blocking sleeve (23) is arranged on the outer side of the connecting part of the upper end of the measuring probe (2) and the lower end of the connecting outer pipe (16).