Valve type orifice plate throttling metering device

Abstract

The utility model relates to a valve type orifice plate throttling metering device, and belongs to the technical field of pipeline fluid flow detection. Comprising a throttling unit and a differential pressure flowmeter, the throttling unit comprises a valve body and a pore plate assembly, the valve body is provided with a fluid channel and a pore plate channel, the fluid channel is communicated with a fluid conveying pipeline, the pore plate channel is vertically communicated with the fluid channel, and the pore plate assembly is slidably installed in the pore plate channel in the horizontal direction; pressure tapping holes communicated with the fluid channel are formed in the top of the valve body and located in the two sides of the pore plate channel. And two inlets of the differential pressure flowmeter are communicated with the pressure tapping holes one by one through vertical pressure guide pipes. According to the valve type orifice plate throttling metering device, the sliding direction of the orifice plate assembly is horizontally arranged, the pressure tapping hole is formed in the top of the valve body, and the pressure guide pipe is vertically connected with the pressure tapping hole, so that liquid accumulation in the pressure guide pipe can be avoided, and the metering accuracy of the device is effectively improved.

Description

Technical Field

[0001] The present application relates to the technical field of pipeline fluid flow detection, and in particular to a valve-type orifice plate throttling metering device. Background Art

[0002] The valve type orifice throttle is a device for detecting the flow rate of fluid on a pipeline. The valve body is provided with a fluid channel for the fluid to pass through, and an orifice assembly is provided in the fluid channel. A through hole is provided on the orifice assembly, and the through hole and the fluid channel are coaxially arranged. Pressure holes are provided on both sides of the orifice assembly on the valve body. When the fluid flows in the fluid channel, the fluid will pass through the through holes on the orifice assembly. The orifice assembly will have a certain throttling and blocking effect on the fluid. Therefore, the pressure of the fluid upstream of the orifice assembly is inconsistent with the pressure of the fluid downstream of the orifice assembly. The pressure hole is connected to the differential pressure flowmeter through the pressure pipe. The differential pressure flowmeter detects the fluid pressure upstream and downstream of the orifice assembly to obtain the flow rate.

[0003] However, when the valve-type orifice throttle is installed and used, the gas flow rate detection is often inaccurate. Figure 1 As shown, the reasons for inaccurate metering are: the sliding direction of the orifice assembly of a conventional valve-type orifice throttle is usually vertical, the pressure holes are located at the lower part of both sides of the valve body, and liquid is easily accumulated in the fluid channel in the valve body. Since there is a horizontal section at the connection between the pressure taking tube and the pressure taking hole, the accumulated liquid in the fluid pipeline is easy to enter the pressure taking tube and remain in the pressure taking tube, affecting the gas pressure measurement data of the differential pressure flowmeter. Utility Model Content

[0004] The present application provides a valve-type orifice plate throttling metering device, which can avoid liquid accumulation in a pressure-conducting pipe, thereby effectively improving the metering accuracy of the device.

[0005] The present application provides a valve-type orifice plate throttling metering device, comprising:

[0006] A throttling unit, the throttling unit comprises a valve body and an orifice plate assembly, the valve body is provided with a fluid channel and an orifice plate channel, the fluid channel is connected with a fluid delivery pipeline, the orifice plate channel is vertically connected with the fluid channel, the orifice plate assembly is slidably installed in the orifice plate channel in a horizontal direction; a pressure-taking hole connected with the fluid channel is provided on the top of the valve body, and the pressure-taking holes are located on both sides of the orifice plate channel;

[0007] A differential pressure flowmeter, wherein the two inlets of the differential pressure flowmeter are connected to the pressure taking holes one by one through vertical pressure guiding pipes.

[0008] As an optional implementation, it further includes a temperature sensor, wherein a detection end of the temperature sensor is connected to the fluid delivery pipeline, and the temperature sensor is connected to the differential pressure flowmeter to transmit temperature data of the fluid.

[0009] As an optional implementation, the pressure-conducting pipes are all provided with pressure-conducting control valves.

[0010] As an optional implementation, the orifice plate assembly includes an orifice plate guide and an orifice plate body, and the orifice plate body is detachably mounted on the orifice plate guide.

[0011] As an optional implementation, the valve body is provided with an outlet portion located at the end of the orifice plate channel and communicated with the orifice plate channel, and a plugging component is detachably connected to the outlet portion.

[0012] As an optional embodiment, the valve body is provided with a first gear chamber and a second gear chamber which are both connected to the orifice plate channel, the first gear chamber is located between the second gear chamber and the fluid channel, and a sealing movable component for blocking the orifice plate channel is slidably connected in the first gear chamber; a first gear rod is rotatably connected in the first gear chamber, and a second gear rod is rotatably connected in the second gear chamber; a rack portion is provided on the orifice plate guide plate, and the rack portion can engage with the first gear rod and the second gear rod.

[0013] As an optional implementation, a third gear rod is rotatably connected to the first gear chamber, and a rack segment meshing with the third gear rod is provided on the sealing moving assembly.

[0014] As an optional embodiment, the sealing assembly includes a pressure plate, a top plate and a tightening bolt. The two ends of the outlet portion of the valve body are connected, and a through groove is provided on the inner wall of the outlet portion. The top plate is stuck in the through groove, and the pressure plate is abutted against the bottom of the outlet portion. The tightening bolt is threadedly connected to the top plate, and the pressure plate is tightened against the bottom of the outlet portion under the action of the tightening bolt.

[0015] The above technical solution provided by the embodiment of the present application has the following advantages compared with the prior art:

[0016] The valve-type orifice throttling metering device provided in the embodiment of the present application has a horizontal sliding direction of the orifice assembly, a pressure taking hole is provided at the top of the valve body, and a pressure guiding tube is vertically connected to the pressure taking hole, which can avoid liquid accumulation in the pressure guiding tube, thereby effectively improving the metering accuracy of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0019] Figure 1 This is a schematic diagram of the structure of the existing valve-type orifice plate throttling metering device described in the background technology of this application;

[0020] Figure 2 A simplified schematic diagram of the structure of a valve-type orifice plate throttling metering device provided in an embodiment of the present application;

[0021] Figure 3 A side view of a valve-type orifice plate throttling metering device provided in an embodiment of the present application;

[0022] Figure 4 A schematic diagram of the throttling unit structure provided in an embodiment of the present application;

[0023] Figure markings: 1-fluid delivery pipeline, 2-throttling unit, 21-valve body, 211-fluid channel, 212-orifice channel, 2121-first gear chamber, 2121a-first gear rod, 2121b-third gear rod, 2122-second gear chamber, 2122a-second gear rod, 213-pressure taking hole, 22-orifice assembly, 221-orifice guide plate, 222-orifice body, 23-sealing assembly, 231-pressure plate, 232-top plate, 233-tightening bolt, 24-sealing moving assembly, 241-sliding valve plate, 31-differential pressure flowmeter, 32-pressure pipe, 33-pressure control valve, 4-temperature sensor. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0025] In this application, unless otherwise specified, the directional words used, such as "upper", "lower", "left", and "right side", refer specifically to the directions of the drawings in the accompanying drawings. In addition, in the description of the specification of this application, the terms "include", "comprise", etc. mean "including but not limited to". In this document, relational terms such as "first" and "second" are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0026] Figure 2 , Figure 3 The structural schematic diagram of the valve type orifice plate throttling metering device provided in the embodiment of the present application, the embodiment of the present application provides a valve type orifice plate throttling metering device, which is used to measure the fluid in the fluid conveying pipeline 1, especially the gas such as natural gas. The valve type orifice plate throttling metering device includes a throttling unit 2 and a differential pressure flowmeter 31. The throttling unit 2 includes a valve body 21 and an orifice plate assembly 22, the valve body 21 is provided with a fluid channel 211 and an orifice plate channel 212, the fluid channel 211 is connected to the fluid conveying pipeline 1, the orifice plate channel 212 is vertically connected to the fluid channel 211, and the orifice plate assembly 22 is slidably installed in the orifice plate channel 212 in the horizontal direction. The orifice plate assembly 22 includes an orifice plate guide 221 and an orifice plate body 222, the orifice plate guide 221 is provided with an orifice plate body mounting hole, and the orifice plate body 222 with openings of different calibers is detachably embedded in the orifice plate body mounting hole to realize the online replacement of the orifice plate body 222. The top of the valve body 21 is provided with a pressure-taking hole 213 connected to the fluid channel 211. The pressure-taking hole 213 is located on both sides of the orifice channel 212. The two inlets of the differential pressure flowmeter 31 are connected to the pressure-taking holes 213 one by one through the vertical pressure-conducting pipe 32. The pressure-conducting pipe 32 is provided with a pressure-conducting control valve 33. When the fluid flows in the fluid channel 211, the orifice assembly 22 has a certain throttling and blocking effect on the fluid. Therefore, the pressure of the fluid upstream of the orifice assembly 22 is inconsistent with the pressure of the fluid downstream of the orifice assembly 22. The differential pressure flowmeter 31 detects the fluid pressure upstream and downstream of the orifice assembly 22 to obtain the flow rate.

[0027] In the valve-type orifice throttling metering device, the sliding direction of the orifice assembly 22 is set horizontally, the pressure-taking hole 213 is set at the top of the valve body 21, and the pressure-taking hole 213 is vertically connected to the pressure-taking hole 213, which can avoid the accumulation of liquid in the pressure-taking hole 213, thereby effectively improving the metering accuracy of the device.

[0028] Reference Figure 4The specific structure of the throttling unit is as follows: a first gear chamber 2121 and a second gear chamber 2122 are provided in the valve body 21, both of which are connected to the orifice channel 212; the first gear chamber 2121 is located between the second gear chamber 2122 and the fluid channel 211; a sealing moving assembly 24 for blocking the orifice channel 212 is slidably connected in the first gear chamber 2121. A first gear rod 2121a is rotatably connected in the first gear chamber 2121, and a second gear rod 2122a is rotatably connected in the second gear chamber 2122. A rack portion is provided on the orifice guide plate 221, and the rack portion can mesh with the first gear rod 2121a and the second gear rod 2122a, so that the orifice guide plate 221 can move horizontally in the orifice channel 212.

[0029] The sealing moving assembly 24 in this embodiment includes a sliding valve plate 241, and the function of the sliding valve plate 241 is to separate the chambers on both sides of the orifice plate channel 212. A third gear rod 2121b is rotatably connected in the first gear chamber 2121, and a rack section meshing with the third gear rod 2121b is provided on the sliding valve plate 241. When the third gear rod 2121b rotates, it can drive the sliding valve plate 241 to slide to close or open the orifice plate channel 212.

[0030] In order to stably drive the orifice plate guide 221, the first gear rod 2121a and the second gear rod 2122a in this embodiment both have two gears, and the orifice plate guide 221 also has two racks, which are respectively located on both sides of the orifice plate assembly 22. Similarly, in order to stably drive the slide valve plate 241, the third gear rod 2121b also has two gears, and the rack sections at the bottom of the slide valve plate 241 also have two.

[0031] The valve body 21 is provided with an outlet portion located at the end of the orifice channel 212 and connected with the orifice channel 212, and a plugging assembly 23 is detachably connected to the outlet portion. The plugging assembly 23 includes a pressing plate 231, a top plate 232 and a tightening bolt 233. The two ends of the outlet portion of the valve body 21 are connected, a through groove is provided on the inner wall of the outlet portion, the top plate 232 is stuck in the through groove, the pressing plate 231 is against the bottom of the outlet portion, and the tightening bolt 233 is threadedly connected to the top plate 232. The pressing plate 231 is tightened against the bottom of the outlet portion under the action of the tightening bolt 233. In this way, by tightening the tightening bolt 233, the tightening bolt 233 generates a certain pressure on the pressing plate 231, so that the pressing plate 231 is against the bottom of the outlet portion under the action of the tightening bolt 233, thereby blocking the top of the orifice channel 212. In order to improve the sealing performance of the pressing plate 231, a pressing plate 231 sealing ring is bonded to the bottom of the pressing plate 231.

[0032] In some embodiments, the valve-type orifice throttling metering device further includes a temperature sensor 4, the detection end of the temperature sensor 4 is connected to the fluid delivery pipeline, and the temperature sensor 4 is connected to the differential pressure flowmeter 31 to transmit the temperature data of the fluid. By detecting the temperature of the fluid, the temperature parameter can be provided to the differential pressure flowmeter 31, further improving the accuracy of flow detection.

[0033] When the valve-type orifice throttling metering device of the utility model is used, the sliding valve plate 241 is opened by rotating the third gear rod 2121b, the chambers on both sides of the orifice channel 212 are connected, the blocking assembly 23 is opened, and the orifice guide plate 221 can be moved to the outlet by rotating the first gear rod 2121a and the second gear rod 2122a, so that the orifice plate can be replaced or the device can be overhauled.

[0034] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A valve type orifice plate throttling metering device, characterized in that: The device comprises: A throttling unit (2), the throttling unit (2) comprising a valve body (21) and an orifice plate assembly (22), the valve body (21) being provided with a fluid channel (211) and an orifice plate channel (212), the fluid channel (211) being in communication with a fluid delivery pipeline (1), the orifice plate channel (212) being in vertical communication with the fluid channel (211), the orifice plate assembly (22) being slidably installed in the orifice plate channel (212) in a horizontal direction; a pressure taking hole (213) being in communication with the fluid channel (211) being provided at the top of the valve body (21), the pressure taking hole (213) being located on both sides of the orifice plate channel (212); A differential pressure flowmeter (31), wherein two inlets of the differential pressure flowmeter (31) are connected to the pressure-taking holes (213) one by one through vertical pressure-conducting pipes (32).

2. The valve type orifice plate throttling metering device according to claim 1 is characterized in that: It also comprises a temperature sensor (4), the detection end of the temperature sensor (4) is in communication with the fluid delivery pipeline (1), and the temperature sensor (4) is connected to the differential pressure flowmeter (31) to transmit the temperature data of the fluid.

3. The valve type orifice plate throttling metering device according to claim 1, characterized in that: The pressure-conducting pipes (32) are each provided with a pressure-conducting control valve (33).

4. The valve type orifice plate throttling metering device according to claim 1, characterized in that: The orifice plate assembly (22) comprises an orifice plate guide plate (221) and an orifice plate body (222), and the orifice plate body (222) is detachably mounted on the orifice plate guide plate (221).

5. The valve type orifice plate throttling metering device according to claim 4, characterized in that: The valve body (21) is provided with an outlet portion located at the end of the orifice plate channel (212) and in communication with the orifice plate channel (212), and a plugging assembly (23) is detachably connected to the outlet portion.

6. The valve type orifice plate throttling metering device according to claim 5, characterized in that: The valve body (21) is provided with a first gear chamber (2121) and a second gear chamber (2122) both of which are in communication with the orifice plate channel (212); the first gear chamber (2121) is located between the second gear chamber (2122) and the fluid channel (211); a sealing moving component (24) for blocking the orifice plate channel (212) is slidably connected in the first gear chamber (2121); a first gear rod (2121a) is rotatably connected in the first gear chamber (2121); a second gear rod (2122a) is rotatably connected in the second gear chamber (2122); a rack portion is provided on the orifice plate guide plate (221), and the rack portion can mesh with the first gear rod (2121a) and the second gear rod (2122a).

7. The valve type orifice plate throttling metering device according to claim 6, characterized in that: A third gear rod (2121b) is also rotatably connected to the first gear chamber (2121), and a rack section meshing with the third gear rod (2121b) is provided on the sealing moving assembly (24).

8. The valve type orifice plate throttling metering device according to claim 6, characterized in that: The blocking assembly (23) comprises a pressure plate (231), a top plate (232) and a tightening bolt (233); the two ends of the outlet portion of the valve body (21) are connected; a through groove is provided on the inner wall of the outlet portion; the top plate (232) is stuck in the through groove; the pressure plate (231) is pressed against the bottom of the outlet portion; the tightening bolt (233) is threadedly connected to the top plate (232); and the pressure plate (231) is pressed against the bottom of the outlet portion under the action of the tightening bolt (233).

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