Low-point liquid drainage device for flow meter pressure tapping pipeline

Abstract

The utility model discloses a low point liquid discharge device for flowmeter pressure tapping pipeline, which comprises a pressure drawing pipe and a connector, the connector comprises a first interface, a second interface and a third interface which are mutually communicated, one end of the pressure drawing pipe is provided with a pressure tapping end used for being communicated with the flowmeter, the other end of the pressure drawing pipe is connected with the first interface, and the third interface is connected with the second interface. A first valve is arranged at the second connector, the third connector is used for being connected with a pressure transmitter, and the connector is lower than the flowmeter. According to the utility model, the connector is additionally arranged on the original pressure drawing pipe, and the connector is arranged below the pressure tapping end, so that low-point liquid drainage operation can be carried out on the pressure drawing pipe of the flowmeter on line, and the situation that the pressure drawing pipe is blocked by ice due to liquid accumulation in the use process of the flowmeter and the pressure measurement is inaccurate is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of natural gas, in particular to a low-point liquid discharge device for a flow meter pressure-taking pipeline. Background Art

[0002] Flowmeter is the main equipment currently used for natural gas trade transfer. Trade transfer requires obtaining the temperature, pressure and composition at the flowmeter to convert the operating flow into the standard flow for transfer. The pressure is generally obtained through the pressure port on the flowmeter body, and the fluid is transmitted to the transmitter through the pressure pipe. During use, the uncertainty of upstream gas quality may cause liquid accumulation in the pressure pipeline, resulting in blockage in the pressure pipe, which causes the measurement result to drift and affects the accuracy of flow measurement.

[0003] At present, the pressure tapping port connecting the flow meter and the transmitter is usually directly connected by a high-pressure hose or a hard pipe, which can only be used for pressure tapping. It is impossible to drain the low point of the flow meter online. The drain can only be discharged through the two-valve group vent valve at the root of the transmitter.

[0004] The problems with this connection are: first, since the pressure-supply pipe is located lower than the pressure transmitter, the accumulated liquid at the low point of the pressure-supply pipe is not easy to be completely discharged from the vent of the two-valve group; second, the use of the two-valve group at the root of the transmitter to drain the liquid requires a large amount of pipeline gas for purging, which easily causes a waste of resources while a large amount of gas leakage increases the safety risk on site.

[0005] Therefore, we propose a low-point drain device for a flow meter pressure-taking pipeline to solve the above problems. Utility Model Content

[0006] The technical problem to be solved by the utility model is to provide a low-point liquid discharge device for a flow meter pressure-taking pipeline. By adding a connector to the original pressure-taking pipe, and the connector is arranged below the pressure-taking end, the low-point liquid discharge operation of the flow meter pressure-taking pipe can be performed online, thereby avoiding ice blockage of the pressure-taking pipe due to liquid accumulation during use of the flow meter, resulting in inaccurate pressure measurement.

[0007] The utility model solves the above-mentioned technical problem with the following technical solution: a low-point liquid discharge device for a flow meter pressure-taking pipeline, comprising a pressure-taking pipe and a connector, the connector comprising a first interface, a second interface and a third interface which are interconnected, one end of the pressure-taking pipe is provided with a pressure-taking end for communicating with the flow meter, the other end of the pressure-taking pipe is connected with the first interface, a first valve is provided at the second interface, the third interface is used for connecting with a pressure transmitter, and the height of the connector is lower than the height of the flow meter.

[0008] The beneficial effects of adopting the above technical solution are:

[0009] By adding a connector to the original pressure-taking pipe, which is arranged below the pressure-taking end, it is possible to perform low-point drainage operations on the pressure-taking pressure-taking pipe of the flow meter online, thereby avoiding ice blockage in the pressure-taking pipe due to liquid accumulation during the use of the flow meter, resulting in inaccurate pressure measurement; and there is no need to discharge through the two-valve group vent of the pressure transmitter, and there is no need to use a large amount of pipeline gas for purging, saving time and cost.

[0010] On the basis of the above technical solution, the present invention can also be improved as follows.

[0011] Furthermore, the pressure-guiding pipe is formed by sequentially splicing or sleeve-jointing multiple branch pipes.

[0012] The beneficial effect of adopting the above further scheme is that it is easy to assemble and disassemble, adapt to the on-site installation conditions, and if the conveying medium pressure in the flow meter is insufficient, the pressure-guiding pipe can be manually disassembled and the large particles of impurities in the branch pipe can be removed using tools.

[0013] Furthermore, two adjacent branch pipes are connected by threads.

[0014] The beneficial effects of adopting the above further solution are that it is easy to assemble and disassemble and has a good fixing effect.

[0015] Furthermore, the pressure-guiding tube is a flexible tube.

[0016] The beneficial effect of adopting the above further solution is that it can adapt to the installation terrain, is light in weight, and is convenient for the operator to work.

[0017] Furthermore, the pressure-guiding tube is a rubber tube or an aluminum alloy flexible tube.

[0018] The beneficial effects of adopting the above further solution are low cost, common parts in the market, and easy purchase.

[0019] Furthermore, a second valve is installed at the pressure taking end.

[0020] The beneficial effect of adopting the above further solution is that when the pressure transmitter needs to be replaced, the second valve can be closed.

[0021] Furthermore, the diameter of the pressure-guiding tube is 5-10 mm.

[0022] The beneficial effect of adopting the above further solution is that the pipe diameter is suitable to meet the general natural gas quality detection.

[0023] Furthermore, the other end of the pressure-inducing tube is connected to the first interface via threads.

[0024] The beneficial effects of adopting the above further solution are that it is easy to assemble and disassemble and has good sealing performance.

[0025] Furthermore, the outer jacket of the pressure-leading pipe is provided with a heat-insulating layer.

[0026] The beneficial effect of adopting the above further solution is that it can effectively keep warm and prevent the conveying medium in the pressure-inducing pipe from being blocked by ice in extremely cold weather.

[0027] Furthermore, the material of the thermal insulation layer is polyethylene.

[0028] The beneficial effects of adopting the above further solution are good thermal insulation and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 The utility model is a structural schematic diagram of a low-point liquid discharge device for a flow meter pressure-taking pipeline.

[0030] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0031] 1. Pressure pipe; 2. Connector; 3. First valve; 4. Second valve. DETAILED DESCRIPTION

[0032] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0033] Embodiment 1:

[0034] like Figure 1 As shown, in this embodiment, a low-point drainage device for a flow meter pressure-taking pipeline includes a pressure-taking pipe 1 and a connector 2, wherein the connector 2 includes a first interface, a second interface and a third interface that are interconnected, one end of the pressure-taking pipe 1 is provided with a pressure-taking end for communicating with the flow meter, and the other end is connected to the first interface, a first valve 3 is provided at the second interface, and the third interface is used to connect to a pressure transmitter, and the height of the connector 2 is lower than the height of the flow meter.

[0035] The beneficial effects of this embodiment are as follows: by adding a connector 2 to the original pressure-taking pipe 1, and the connector 2 is arranged below the pressure-taking end, it is possible to realize online low-point drainage operation of the pressure-taking pressure-taking pipe of the flow meter, thereby avoiding ice blockage of the pressure-taking pressure pipe 1 due to liquid accumulation during use of the flow meter, resulting in inaccurate pressure measurement; and there is no need to discharge through the two-valve group vent port of the pressure transmitter, and there is no need to use a large amount of pipeline gas for purging, saving time and cost.

[0036] Furthermore, the second interface is externally connected to a drainage pipe, and a first valve 3 is provided on the drainage pipe near the second interface.

[0037] Furthermore, the flowmeter and pressure transmitter involved in the present application belong to the prior art. The pressure-taking end of the pressure-leading pipe 1 extends into the flowmeter, and the third interface is connected to the pressure transmitter through a pipeline, so as to convert the pressure signal into an electrical signal and facilitate subsequent pressure testing.

[0038] Example 2

[0039] Preferably, on the basis of Embodiment 1, the pressure-guiding pipe 1 is formed by sequentially splicing or sleeve-jointing multiple branch pipes.

[0040] The beneficial effects of this embodiment are: it is easy to assemble and disassemble, adapts to the installation conditions on site, and if the conveying medium pressure in the flow meter is insufficient, the pressure-guiding pipe 1 can be manually disassembled and large particles of impurities in the branch pipe can be removed using tools.

[0041] Because it is generally used in natural gas pipeline transportation, the conveying medium in the flow meter is 0.1-10MPa. When the pressure is relatively small, large particles in the pressure-conducting pipe 1 will be blocked. Therefore, when the pressure-conducting pipe 1 becomes a detachable splicing structure, the large particles can be easily removed without affecting the subsequent drainage.

[0042] Example 3

[0043] Preferably, based on Embodiment 2, two adjacent branch pipes are connected by threads.

[0044] The beneficial effects of this embodiment are that it is easy to assemble and disassemble, and has a good fixing effect.

[0045] An alternative solution to the above-mentioned embodiment 3 is that two adjacent branch pipes are connected by crimping.

[0046] Example 4

[0047] Preferably, on the basis of Embodiments 1-3, the pressure-guiding tube 1 is a flexible tube.

[0048] The beneficial effects of this embodiment are: it can adapt to the installation terrain, is light in weight, and is convenient for the operator to work.

[0049] Furthermore, of course, the pressure-inducing pipe 1 can also be a rigid pipe, such as Figure 1 As shown, the pressure-conducting pipe 1 is tilted, the connector 2 and the second valve 3 are at a low position, and the tilt angle of the pressure-conducting pipe 1 can be 5-12°, which is convenient for discharging accumulated liquid and saving the emptying amount during the emptying process.

[0050] Example 5

[0051] Preferably, on the basis of Embodiment 4, the pressure-guiding tube 1 is a rubber tube or an aluminum alloy flexible tube.

[0052] The beneficial effects of this embodiment are: low cost, common parts in the market, and easy purchase.

[0053] Furthermore, when the pressure-guiding pipe 1 is a rubber pipe, it can be a whole pipe; when the pressure-guiding pipe 1 is an aluminum alloy flexible pipe, it can be a plurality of branch pipes threadedly connected.

[0054] Example 6

[0055] Preferably, based on embodiments 1-5, a second valve 4 is installed at the pressure taking end.

[0056] The beneficial effect of this embodiment is that when the pressure transmitter needs to be replaced, the second valve can be closed.

[0057] Example 7

[0058] Preferably, based on embodiments 1-6, the diameter of the pressure-guiding tube 1 is 5-10 mm.

[0059] The beneficial effects of this embodiment are: suitable pipe diameter can meet the general natural gas quality detection.

[0060] It should be noted that the diameter of the pressure-guiding pipe 1 may be other sizes and may be applied in other fields to meet universal requirements.

[0061] Example 8

[0062] Preferably, based on Embodiments 1-7, the other end of the pressure-guiding tube 1 is connected to the first interface via threads.

[0063] The beneficial effects of this embodiment are: easy assembly and disassembly, and good sealing performance.

[0064] Example 9

[0065] Preferably, on the basis of embodiments 1-8, the pressure-guiding pipe 1 is provided with an insulating layer on its outer sleeve.

[0066] The beneficial effect of this embodiment is that it can effectively keep warm and prevent the conveying medium in the pressure-inducing pipe from being blocked by ice in extremely cold weather.

[0067] Example 10

[0068] Preferably, based on Example 9, the material of the thermal insulation layer is polyethylene.

[0069] The beneficial effects of this embodiment are good thermal insulation and low cost.

[0070] The beneficial effects of the utility model are:

[0071] It replaces the traditional direct connection method of high-pressure hose or hard pipe, and is suitable for most natural gas metering stations. It can realize the low-point liquid discharge operation of the flow meter pressure-taking and pressure-suction pipe online, avoiding ice blockage due to liquid accumulation in the pressure-suction pipe during the use of the flow meter, resulting in inaccurate pressure measurement.

[0072] In the description of the present invention, it should be understood that the terms "center", "length", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "inside", "outside", "peripheral", "circumferential" and the like indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred system or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0073] In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0074] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0075] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0076] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A low-point drain device for a flow meter pressure-taking pipeline, characterized in that: The invention comprises a pressure-guiding pipe (1) and a connecting head (2), wherein the connecting head (2) comprises a first interface, a second interface and a third interface which are interconnected, one end of the pressure-guiding pipe (1) is provided with a pressure-taking end for communicating with a flow meter, and the other end is connected to the first interface, the second interface is provided with a first valve (3), and the third interface is used for connecting to a pressure transmitter, and the height of the connecting head (2) is lower than the height of the flow meter.

2. A low-point drain device for a flow meter pressure-taking pipeline according to claim 1, characterized in that: The pressure-guiding pipe (1) is formed by sequentially splicing or sleeve-jointing a plurality of branch pipes.

3. A low-point drain device for a flow meter pressure-taking pipeline according to claim 2, characterized in that: Two adjacent branch pipes are connected via threads.

4. A low-point drain device for a flow meter pressure-taking pipeline according to claim 1, characterized in that: The pressure-guiding tube (1) is a flexible tube.

5. A low-point drain device for a flow meter pressure-taking pipeline according to claim 4, characterized in that: The pressure-guiding tube (1) is a rubber tube or an aluminum alloy flexible tube.

6. The low-point drain device for a flow meter pressure-taking pipeline according to claim 1, characterized in that: A second valve (4) is installed at the pressure taking end.

7. A low point drain device for a flow meter pressure taking pipeline according to any one of claims 1 to 6, characterized in that: The diameter of the pressure-guiding tube (1) is 5-10 mm.

8. A low point drain device for a flow meter pressure taking pipeline according to any one of claims 1 to 6, characterized in that: The other end of the pressure-guiding tube (1) is connected to the first interface via a thread.

9. A low point drain device for a flow meter pressure taking pipeline according to any one of claims 1 to 6, characterized in that: The outer jacket of the pressure-guiding pipe (1) is provided with a heat-insulating layer.

10. A low point drain device for a flow meter pressure taking pipeline according to claim 9, characterized in that: The material of the thermal insulation layer is polyethylene.

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