Integrated coal bed gas metering device

Abstract

The utility model discloses an integrated coal bed gas metering device, and relates to the field of coal bed gas metering transmission and distribution. Comprising a front throttling cut-off emptying valve, a front emergency cut-off valve, a front pressure gauge, two filters, two turbine flowmeters, four manual ball valves, a metering area throttling cut-off emptying valve, a flow regulating valve, a rear throttling cut-off emptying valve, a control system and the like, and the integrated coal bed gas metering device achieves the functions of continuous metering, flow regulating and accident emptying. The device is provided with a standby metering circuit, metering is not interrupted when the flowmeter breaks down or is detected, pressure relief can be safely and conveniently conducted on a pipeline when the flowmeter is disassembled or overhauled, meanwhile, when an upstream pipeline or a downstream pipeline breaks down, the faulty pipeline can be rapidly cut off, and emptying pressure relief is achieved. The coal bed gas metering device can achieve the functions of accurate metering, accurate quantity adjustment, accident cut-off, emptying pressure relief and the like of coal bed gas, guarantees scientific metering of the coal bed gas, and guarantees safe production.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of coalbed gas metering and distribution, in particular to an integrated coalbed gas metering device. BACKGROUND

[0002] During the process of coalbed gas metering and distribution, continuous and accurate metering is required, and when supplying different users or gas from different upstream pipelines, the flow needs to be adjusted frequently and overpressure venting is required. In order to realize the functions of continuous metering, flow adjustment, and emergency venting, the device is required to have a standby metering path, so that metering can be uninterrupted when the flow meter fails or is being calibrated, and the pipeline can be safely and conveniently depressurized when the flow meter is being disassembled or repaired. At the same time, when the upstream or downstream pipeline fails, the failed pipeline can be quickly cut off, and venting and depressurization can be realized.

[0003] Due to early design and construction, some gas stations have imperfect metering systems, and only a single flow meter is used for metering. When the flow meter is being calibrated or repaired, metering is not possible. When the flow is adjusted for different users, the ball valves before and after the flow meter cannot accurately adjust the flow. When the upstream or downstream pipeline fails, it needs to be vented and depressurized, and the existing venting system is not perfect. Therefore, an integrated coalbed gas metering device needs to be developed. SUMMARY

[0004] The utility model aims at the deficiency in the prior art, and designs an integrated coalbed gas metering device to solve the problems of continuous metering, accurate flow adjustment, and overpressure venting during the process of coalbed gas metering and distribution.

[0005] In order to achieve the above-mentioned purpose, the utility model provides an integrated coalbed gas metering device, which adopts the following technical scheme, comprising: a pre-positioned emergency shut-off valve is arranged in the pipeline, a first manual ball valve and a second manual ball valve are arranged in parallel at the rear end of the pre-positioned emergency shut-off valve; a first pressure gauge is arranged at the rear end of the first manual ball valve, a first turbine flow meter is arranged at the rear end of the first pressure gauge, and a third manual ball valve is arranged at the rear end of the first turbine flow meter; a second pressure gauge is arranged at the rear end of the second manual ball valve, a second turbine flow meter is arranged at the rear end of the second pressure gauge, and a fourth manual ball valve is arranged at the rear end of the second turbine flow meter; an electric flow regulating valve is connected to the rear ends of the third manual ball valve and the fourth manual ball valve; the integrated coalbed gas metering device is provided with an explosion-proof junction box, and the signals of flow, valves, etc. are uniformly connected to the explosion-proof control box, the flow signals of the first and second turbine flow meters, the control signals of the flow regulating valve and the emergency shut-off valve are uniformly connected to the station control system or the built-in small PLC module for local control.

[0006] Further, the front emergency cut-off valve is provided with a front manual flange ball valve, and the front manual flange ball valve is provided with a front throttling cut-off vent valve; the electric flow regulating valve is provided with a rear manual flange ball valve, and the rear manual flange ball valve is provided with a rear throttling cut-off vent valve.

[0007] Further, the first pressure gauge and the first turbine flowmeter are provided with a first front filter; and the second pressure gauge and the second turbine flowmeter are provided with a second front filter.

[0008] Further, the first turbine flowmeter and the third manual ball valve are provided with a first manual flange ball valve, and the first manual flange ball valve is provided with a first throttling cut-off vent valve at the other end; and the second turbine flowmeter and the fourth manual ball valve are provided with a second manual flange ball valve, and the second manual flange ball valve is provided with a second throttling cut-off vent valve at the other end.

[0009] Further, the electric flow regulating valve is provided with a front blocking manual flange ball valve at the front end, and a rear blocking manual flange ball valve at the rear end, and the front blocking manual flange ball valve is provided with a parallel manual regulating valve in parallel with the rear blocking manual flange ball valve.

[0010] Compared with the prior art, the utility model has the advantages that:

[0011] The utility model discloses a kind of integrated coalbed gas measuring devices, which is composed of front throttling cut-off vent valve, front emergency cut-off valve, front pressure gauge, 2 filters, 2 turbine flowmeters, 4 manual ball valves, metering area throttling cut-off vent valve, flow regulating valve, rear throttling cut-off vent valve and control system, and can realize accurate measurement, accurate volume adjustment, accident cut-off, venting pressure relief and other functions of coalbed gas, ensure scientific measurement of coalbed gas, and guarantee safety production. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is the whole structure schematic diagram of the utility model.

[0013] In the figure: 1-preposed throttle cut-off vent valve; 2-preposed manual flange ball valve; 3-preposed emergency shut-off valve; 41-first manual ball valve; 42-second manual ball valve; 43-third manual ball valve; 44-fourth manual ball valve; 51-first pressure gauge; 52-second pressure gauge; 61-first preposed filter; 62-second preposed filter; 71-first turbine flowmeter; 72-second turbine flowmeter; 81-first throttle cut-off vent valve; 82-first manual flange ball valve; 83-second throttle cut-off vent valve; 84-second manual flange ball valve; 9-electric flow regulating valve; 101-parallel manual regulating valve; 102-preposed blocking manual flange ball valve; 103-postposed blocking manual flange ball valve; 11-postposed throttle cut-off vent valve; 12-postposed manual flange ball valve. DETAILED DESCRIPTION

[0014] The preferred embodiments of the present application will be described in more detail below. Although the preferred embodiments of the present application are described below, it is understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present application can be more thoroughly and completely conveyed to those skilled in the art.

[0015] In the description of the present application, it should be noted that the terms "first", "second" are only for the purpose of description, and should not be understood as indicating or implying relative importance.

[0016] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0017] As shown in Figure 1 The present application is an integrated coalbed gas metering device, which comprises: a preposed emergency shut-off valve 3 arranged in a pipeline, a preposed manual flange ball valve 2 arranged at the front end of the preposed emergency shut-off valve 3, and a preposed throttle cut-off vent valve 1 arranged at the front end of the preposed manual flange ball valve 2.

[0018] The first manual ball valve 41 is provided with the first pre-filter 61 at the rear end, the first pre-filter 61 is provided with the first turbine flow meter 71 at the rear end, and the first turbine flow meter 71 is provided with the third manual ball valve 43 at the rear end.

[0019] Specifically, the first turbine flow meter 71 and the third manual ball valve 43 are provided with the first manual flange ball valve 82, and the other end of the first manual flange ball valve 82 is provided with the first throttling stop vent valve 81.

[0020] The third manual ball valve 43 and the fourth manual ball valve 44 are jointly connected with the front blocking manual flange ball valve 102 at the rear end, the front blocking manual flange ball valve 102 is provided with the electric flow regulating valve 9 at the rear end, the electric flow regulating valve 9 is provided with the rear blocking manual flange ball valve 103 at the rear end, and the parallel manual regulating valve 101 is arranged in parallel between the front end of the front blocking manual flange ball valve 102 and the rear end of the rear blocking manual flange ball valve 103.

[0021] Specifically, the parallel manual regulating valve 101 and the rear blocking manual flange ball valve 103 are provided with the rear manual flange ball valve 12 at the rear end, and the rear manual flange ball valve 12 is provided with the rear throttling stop vent valve 11 at the rear end.

[0022] In the specific use of the utility model, the pre-vent valve device is arranged, which is used for carrying out accident venting on the upstream gas coal seam gas, and the combination structure of the pre-throttling stop vent valve 1 and the pre-manual flange ball valve 2 is arranged, when the upstream accident or other reasons need to be vented and depressurized, the pre-emergency cut-off valve 3 of the device is closed, then the manual flange ball valve 2 of the empty pipeline is fully opened, and then the pre-throttling stop vent valve 1 is slowly opened to control the release speed, so that the venting operation of the upstream pipeline can be realized.

[0023] The pre-emergency cut-off valve is arranged, which is used for carrying out emergency cut-off on the coal seam gas entering the turbine flow meter, and can be connected with a station control system, when an emergency accident occurs, the upstream gas source is quickly cut off, and the gas supply process is interrupted.

[0024] In the utility model, the four manual ball valves are used for carrying out process switching on the two turbine flow meters, and the flow meter is convenient to maintain or calibrate.

[0025] 2 pressure gauges are used for detecting the pressure of coal bed gas before entering 2 pre-filter, which can compare with the pressure measured by turbine flow meter, monitor the pressure difference before and after pre-filter, clean or replace the filter element when the pressure difference increases; meanwhile, 2 parallel pre-filters are used for dust removal and filtration of coal bed gas entering turbine flow meter, preventing foreign matter or impurities in pipeline from damaging flow meter, and discharging a small amount of water.

[0026] 2 parallel turbine flow meters realize 1 use and 1 standby, the first ensures uninterrupted measurement when turbine flow meter is overhauled or calibrated, and the second can compare the measurement to improve the measurement accuracy.

[0027] The utility model discloses a metering area vent valve device, which is used for venting the turbine flow meter pipe section in case of an accident, and the vent valve device adopts a combined structure of a manual flange ball valve and a throttling stop vent valve. When venting and pressure relief are needed, the upstream and downstream valves of the turbine flow meter are closed, then the manual flange ball valve of the empty pipeline is fully opened, and then the throttling stop vent valve is slowly opened to control the release speed, so that the venting operation of the upstream pipeline can be realized.

[0028] Specifically, the electric flow regulating valve 9 is used for regulating the flow of the pipeline, adopts an explosion-proof electric flow regulating valve, can accurately regulate the flow, and after the flow signals of the two turbine flow meters are input into the station control system, a PID regulating module is formed, so that the automatic regulation of the flow can be realized, and the valve can be quickly closed to cut off the gas supply process when the downstream is not needed or the pipeline fails.

[0029] The electric flow regulating valve 9 is provided with a bypass manual regulating valve and two manual flange ball valves in front and behind, which are used for switching to the manual regulating valve to regulate the flow when the automatic flow regulating valve fails or is overhauled.

[0030] The utility model discloses a post-positioned vent valve device, which is used for venting the downstream pipeline coal bed gas in case of an accident. The post-positioned vent valve device adopts a combined structure of a post-positioned manual flange ball valve 12 and a post-positioned throttling stop vent valve 11. When the downstream pipeline needs to be vented and pressure relieved due to an accident or other reasons, the front-end valve is closed, then the post-positioned manual flange ball valve 12 of the empty pipeline is fully opened, and then the post-positioned throttling stop vent valve 11 is slowly opened to control the release speed, so that the venting and pressure relief operation of the downstream pipeline can be realized.

[0031] The explosion-proof junction box is arranged on the site, and the signals such as flow and valve are uniformly input into the explosion-proof control box and reserved for wiring ports. The flow signals of the two turbine flow meters, the control signals of the electric flow regulating valve 9 and the emergency shut-off valve can be uniformly input into the station control system or a built-in small PLC module for local control.

[0032] The above embodiments are only preferred embodiments of the present application, and the above description is not sequentially limiting the protection scope of the present application, the above description is exemplary and not exhaustive, so: equivalent changes made according to the structure, shape, principle of the present application should be covered in the protection scope of the present application, and many modifications and changes are obvious to those skilled in the art without deviating from the scope and spirit of the described embodiments.

Claims

1. An integrated coal bed gas metering device, characterized by, The pipeline is provided with a front emergency shut-off valve (3), the rear end of the front emergency shut-off valve (3) is provided with a first manual ball valve (41) and a second manual ball valve (42) in parallel, the rear end of the first manual ball valve (41) is provided with a first pressure gauge (51), the rear end of the first pressure gauge (51) is provided with a first turbine flowmeter (71), the rear end of the first turbine flowmeter (71) is provided with a third manual ball valve (43), the rear end of the second manual ball valve (42) is provided with a second pressure gauge (52), the rear end of the second pressure gauge (52) is provided with a second turbine flowmeter (72), the rear end of the second turbine flowmeter (72) is provided with a fourth manual ball valve (44), the rear end of the third manual ball valve (43) and the fourth manual ball valve (44) is jointly connected with an electric flow regulating valve (9), the integrated coalbed gas metering device is provided with an explosion-proof junction box, the flow, valve and other signals are uniformly connected into the explosion-proof control box, the first and second turbine flowmeter flow signals, the flow regulating valve and the control signals of the emergency shut-off valve are uniformly connected into the station control system or the built-in small PLC module for local control. The front end of the front emergency shut-off valve (3) is provided with a front manual flange ball valve (2), the front end of the front manual flange ball valve (2) is provided with a front throttling stop vent valve (1), the rear end of the electric flow regulating valve (9) is provided with a rear manual flange ball valve (12), and the rear end of the rear manual flange ball valve (12) is provided with a rear throttling stop vent valve (11).

2. The integrated coal bed gas metering device of claim 1, wherein, A first front filter (61) is arranged between the first pressure gauge (51) and the first turbine flowmeter (71), and a second front filter (62) is arranged between the second pressure gauge (52) and the second turbine flowmeter (72).

3. The integrated coal bed gas metering device of claim 1, wherein, A first manual flange ball valve (82) is arranged between the first turbine flowmeter (71) and the third manual ball valve (43), and the other end of the first manual flange ball valve (82) is provided with a first throttling stop vent valve (81), a second manual flange ball valve (84) is arranged between the second turbine flowmeter (72) and the fourth manual ball valve (44), and the other end of the second manual flange ball valve (84) is provided with a second throttling stop vent valve (83).

4. The integrated coal bed gas metering device of claim 1, wherein, The front end of the electric flow regulating valve (9) is provided with a front blocking manual flange ball valve (102), the rear end of the electric flow regulating valve (9) is provided with a rear blocking manual flange ball valve (103), and a parallel manual regulating valve (101) is arranged in parallel between the front end of the front blocking manual flange ball valve (102) and the rear end of the rear blocking manual flange ball valve (103).

5. The integrated coal bed gas metering device of claim 1, wherein, ​

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