A freeze-proof device for orifice flowmeter of gas

Abstract

The utility model discloses a kind of orifice plate flowmeter anti-freezing devices for gas, it is related to flow measurement instrument technical field, install on flowmeter body, including the liquid water separation mechanism of installing in the input end of flowmeter body and the temperature rising mechanism of installing in flowmeter body, liquid water separation mechanism includes shell and lining, shell is communicated with the input end of flowmeter body, lining is installed in the inside of shell.The orifice plate flowmeter anti-freezing device for gas not only can keep good gas-liquid separation effect by the misplacement hole-flow mode of being set in liquid water separation mechanism, reduce the liquid water content of flowing gas, effectively reduce the water in front of orifice plate flowmeter, cooperation setting temperature rising mechanism can also realize the heating of orifice plate structure, ensure that orifice plate temperature is above zero degree Effective prevent liquid icing;Further, in the case of guaranteeing orifice plate flowmeter accuracy, reduce the influence of air temperature on orifice plate flowmeter use, effectively improve the practicality and use effect of device.

Description

Technical Field

[0001] This utility model relates to the field of flow measurement instrument technology, and more specifically, to an antifreeze device for a gas orifice plate flow meter. Background Technology

[0002] An orifice plate flow meter is a differential pressure flow measurement instrument widely used in industrial fields, primarily for measuring the flow rate of liquids, gases, or steam. Its working principle is based on Bernoulli's equation and the principle of fluid continuity, calculating the flow rate by measuring the pressure difference generated before and after the fluid passes through the orifice plate.

[0003] Chinese utility model patent CN210036833U discloses an orifice plate flowmeter, including an orifice plate throttling device, a valve assembly, and a differential pressure transmitter. The orifice plate throttling device includes an orifice plate, at least one set of pressure tapping lines, at least one set of drain pipes, and at least one liquid collection device. One end of each pressure tapping line in the at least one set is connected to the orifice plate, and the other end is connected to the valve assembly. The orifice plate flowmeter in this technical solution connects at least one set of drain pipes to at least one set of pressure tapping lines connected to the orifice plate and valve assembly, and connects them to at least one liquid collection device. This allows the liquid collection device to collect the liquid discharged from the pressure tapping lines, thereby preventing the differential pressure value of the orifice plate flowmeter from being too large and improving the accuracy of the measurement. However, although the above technical solutions can achieve the effect of removing accumulated liquid, they act directly on the flow meter. The accumulated liquid can only be removed after it has formed inside the flow meter, which is not conducive to reducing the formation of accumulated liquid. If the accumulated liquid freezes under low temperature before it is removed, it will not only be difficult to effectively remove the accumulated liquid and affect the accuracy of the flow meter, but may also cause the flow meter to explode. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide an antifreeze device for a gas orifice plate flow meter, so as to reduce the water molecule content in the gas by setting a liquid water separation structure before the inlet of the orifice plate flow meter. This not only effectively reduces the generation of liquid accumulation, but also prevents freezing inside the orifice plate flow meter in conjunction with the set heating structure, thereby ensuring the accuracy of the orifice plate flow meter and ensuring its good performance.

[0005] To achieve the above objectives, this utility model provides an anti-freezing device for a gas orifice plate flowmeter, which is installed on the flowmeter body and includes:

[0006] A liquid water separation mechanism is installed at the input end of the flow meter body;

[0007] A heating mechanism is installed inside the flow meter body. An orifice plate structure adapted to the inner wall of the flow meter body is installed inside the flow meter body. The heating mechanism includes a heating block installed inside the flow meter body for heating the orifice plate structure in the flow meter body.

[0008] The liquid water separation mechanism includes a housing that communicates with the input end of the flow meter body and an inner liner installed inside the housing;

[0009] The outer casing includes an upper casing installed at the input end of the flow meter body, a lower casing installed at the bottom of the upper casing, and a drain structure installed at the bottom of the lower casing. An air inlet pipe and an air outlet pipe are horizontally and symmetrically arranged on the outer periphery of the upper casing, and the air outlet pipe is connected to the input end of the flow meter body.

[0010] The liner includes a first bracket vertically installed on the inner wall of the upper shell, two second brackets vertically symmetrically installed on the inner wall of the lower shell, and a water-blocking structure vertically slidably inserted into the first bracket and the second bracket, wherein the second bracket is located directly below the first bracket;

[0011] The water-blocking structure installed after the gas enters the outer shell is used to guide the gas to move along a preset path within the outer shell, and to separate the gas and liquid by utilizing the differences in physical properties between the gas and liquid.

[0012] Furthermore, the water-blocking structure includes a partition vertically slidably inserted into the first card seat and the second card seat, and a first water-blocking component and a second water-blocking component respectively installed on both sides of the partition. The partition is used to divide the inner cavity of the outer shell into an air inlet cavity and an air outlet cavity, and the first water-blocking component and the second water-blocking component are respectively located in the air inlet cavity and the air outlet cavity.

[0013] Furthermore, the first water-blocking component includes several first water-blocking wing plates inclinedly disposed on the side of the partition facing the air inlet cavity. Each of the first water-blocking wing plates is vertically provided with a first venting hole group, and the first venting hole group includes several evenly arranged first venting holes.

[0014] Furthermore, the positions of the first vent holes on each of the first water-deflecting wing plates are staggered in the vertical direction. The position of the first vent holes on the lower first water-deflecting wing plate is closer to the partition than the position of the first vent holes on the upper first water-deflecting wing plate. The first vent holes on the lowest first water-deflecting wing plate are closest to the partition.

[0015] Furthermore, the second water-blocking component includes several second water-blocking wing plates inclinedly disposed on the side of the partition plate facing the air outlet chamber. Each second water-blocking wing plate is provided with a second vent hole group vertically, and the second vent hole group includes several evenly arranged second vent holes.

[0016] Furthermore, the positions of the second vent holes on each of the second water deflector plates are staggered in the vertical direction. The position of the second vent holes on the upper second water deflector plate is closer to the partition than the position of the second vent holes on the lower second water deflector plate, and the position of the second vent holes on the uppermost second water deflector plate is closest to the partition.

[0017] Furthermore, both the first card holder and the second card holder are U-shaped. The length of the first card holder is less than the depth of the inner wall of the lower housing. The top of the second card holder is sealed to the inner top wall of the upper housing. The first card holder and the second card holder are respectively provided with a first sealing strip and a second sealing strip adapted to the thickness of the partition.

[0018] Furthermore, the drainage structure includes a drain outlet located at the bottom of the lower housing and a drain valve installed at the bottom of the drain outlet.

[0019] Furthermore, a first connecting flange and a second connecting flange are respectively provided on the opposite side of the upper housing and the lower housing, and a third connecting flange is provided on the end of the air inlet pipe and the air outlet pipe away from the upper housing.

[0020] Compared with the prior art, this utility model has the following advantages and effects:

[0021] The antifreeze device for gas orifice plate flowmeters in this invention not only maintains good gas-liquid separation through the staggered perforation flow pattern in the liquid water separation mechanism, reducing the liquid water content of the flowing gas and effectively reducing water accumulation at the front end of the orifice plate flowmeter, but also, in conjunction with the heating mechanism, heats the orifice plate structure to ensure that the orifice plate temperature is above zero degrees Celsius, effectively preventing liquid freezing. Thus, while ensuring the accuracy of the orifice plate flowmeter, it reduces the impact of temperature on the use of the orifice plate flowmeter, effectively improving the practicality and effectiveness of the device. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the antifreeze device for the orifice plate flowmeter for gas in this embodiment of the present invention;

[0023] Figure 2 This is a top view of the antifreeze device for the orifice plate flowmeter used in the present invention.

[0024] Figure 3 for Figure 2 Schematic diagram of the structure at point AA;

[0025] Figure 4 This is a three-dimensional structural diagram of the water-blocking structure of the gas orifice plate flowmeter antifreeze device in this embodiment of the present invention;

[0026] Figure 5 for Figure 2 Schematic diagram of the structure at point BB;

[0027] Figure 6 This is a schematic diagram of the opening side structure of the upper or lower housing of the gas orifice plate flowmeter antifreeze device in the embodiments of this utility model.

[0028] Explanation of reference numerals in the attached figures:

[0029] 1-Outer shell;

[0030] 11-Upper housing; 111-First connecting flange; 112-Inlet pipe; 113-Outlet pipe; 114-Third connecting flange;

[0031] 12-Lower housing; 121-Second connecting flange;

[0032] 13-Drainage structure; 131-Drain outlet; 132-Drain valve;

[0033] 2- Lining;

[0034] 21-First mounting bracket; 211-First sealing strip; 22-Water-blocking structure; 221-Baffle; 222-First water-blocking component; 2221-First water-blocking wing plate; 2222-First vent assembly; 223-Second water-blocking component; 2231-Second water-blocking wing plate; 2232-Second vent assembly; 23-Second mounting bracket; 231-Second sealing strip;

[0035] 3-Flowmeter body;

[0036] 31-Perforated plate structure; 311-Heating block. Detailed Implementation

[0037] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0038] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can also refer to the internal connection of two components; and they can refer to a wireless connection or a wired connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0039] Please see Figure 1-6 As shown, this utility model embodiment provides an antifreeze device for a gas orifice plate flowmeter, which is installed on the flowmeter body 3 and includes a liquid water separation mechanism installed at the input end of the flowmeter body 3 and a heating mechanism installed inside the flowmeter body 3.

[0040] The liquid water separation mechanism includes an outer shell 1 and an inner liner 2. The outer shell 1 is connected to the input end of the flow meter body 3, and the inner liner 2 is installed inside the outer shell 1.

[0041] The outer casing 1 includes an upper casing 11, a lower casing 12, and a drain structure 13. The upper casing 11 is connected to the flow meter body 3. The lower casing 12 is installed at the bottom of the upper casing 11. The drain structure 13 is installed at the bottom of the lower casing 12. The outer periphery of the upper casing 11 is horizontally symmetrically provided with an inlet pipe 112 and an outlet pipe 113, and the outlet pipe 113 is connected to the input end of the flow meter body 3. This facilitates the entry of gas from the inlet pipe 112 into the inner side of the outer casing 1 and into the flow meter body 3 through the outlet pipe 113.

[0042] The inner liner 2 includes a first card seat 21, a second card seat 23 and a water-blocking structure 22. The first card seat 21 is vertically installed on the inner wall of the lower housing 12, and the second card seat 23 is vertically installed on the inner wall of the upper housing 11. The water-blocking structure 22 is vertically slidably inserted into the first card seat 21 and the second card seat 23, with the second card seat 23 located directly below the first card seat 21.

[0043] The water-blocking structure 22 set after the gas enters the outer casing 1 is used to guide the gas to move in the outer casing 1 along a preset path, and to separate the gas and liquid by utilizing the difference in physical properties of gas and liquid, thereby reducing the front end technology of the flow meter body 3.

[0044] The heating mechanism includes a heating block 311 installed inside the flow meter body 3 for heating the orifice plate structure 31 in the flow meter body 3. The operation of the heating block 311 makes it easy to keep the temperature of the orifice plate structure 31 in the flow meter body 3 above zero, further preventing liquid water from freezing and affecting the accuracy of the flow meter.

[0045] As a preferred embodiment of the above scheme, the heating block 311 is a combination of an electric heating device and a temperature sensing device, so as to facilitate the temperature control of the orifice plate structure 31 in the flow meter body 3. Furthermore, an insulation structure can be provided on the outside of the flow meter body 3 to reduce the influence of external air temperature on the internal temperature of the flow meter body 3 while minimizing temperature loss, thereby effectively preventing freezing.

[0046] Please see Figure 1-5 As shown, the water-blocking structure 22 includes a partition 221, a first water-blocking component 222, and a second water-blocking component 223. The partition 221 is vertically slidably inserted into the first card seat 21 and the second card seat 23. The first water-blocking component 222 and the second water-blocking component 223 are respectively installed on the two sides of the partition 221. The partition 221 is used to divide the inner cavity of the outer shell 1 into an air inlet cavity and an air outlet cavity. The first water-blocking component 222 and the second water-blocking component 223 are respectively located in the air inlet cavity and the air outlet cavity.

[0047] Please see Figure 1-5 As shown, the first water-blocking component 222 includes several first water-blocking wing plates 2221 that are inclinedly arranged on the side of the partition plate 221 facing the air inlet chamber. Each first water-blocking wing plate 2221 is provided with a first venting hole group 2222 vertically. The first venting hole group 2222 includes several evenly arranged first air holes, which facilitates the passage of gas through the first air holes through the first water-blocking wing plate 2221.

[0048] Please see Figure 1-5 As shown, the positions of the first vent groups 2222 on each of the first water deflector plates 2221 are staggered in the vertical direction. The position of the first vent group 2222 on the lower first water deflector plate 2221 is closer to the partition plate 221 than the position of the first vent group 2222 on the upper first water deflector plate 2221. The first vent group 2222 on the lowest first water deflector plate 2221 is closest to the partition plate 221.

[0049] As a further description of the above solution, when the gas flows downward in the air inlet chamber, it is blocked by the first water baffle 2221 when it flows from the first air hole of the upper layer to the lower layer through the staggered hole arrangement. This can effectively separate the liquid. Moreover, the water-blocking part of the first water baffle 2221 is at the bottom, and the first air hole for air passage is at the top. Water flows downward and air flows upward, so the air and water will not cross, resulting in a good separation effect.

[0050] Please see Figure 1-5 As shown, the second water-blocking component 223 includes several second water-blocking wing plates 2231 that are inclinedly arranged on the side of the partition plate 221 facing the air outlet chamber. Each second water-blocking wing plate 2231 is provided with a second air vent group 2232 vertically. The second air vent group 2232 includes several evenly arranged second air holes.

[0051] Please see Figure 1-5 As shown, the second vent groups 2232 on each of the second water deflectors 2231 are staggered in the vertical direction. The second vent groups 2232 on the upper second water deflector 2231 are closer to the partition 221 than the second vent groups 2232 on the lower second water deflector 2231. The second vent groups 2232 on the uppermost second water deflector 2231 are closest to the partition 221.

[0052] As a further description of the above scheme, when the gas flows upward in the gas outlet chamber, the gas flows from the lower second air hole to the upper layer through the above staggered hole arrangement and is blocked by the second water baffle 2231. The water-blocking part of the second water baffle 2231 is at the bottom and the second air hole for air passage is at the top. Water flows downward and gas flows upward, so the gas and water will not cross, which can effectively separate the liquid.

[0053] Please see Figure 1-6 As shown, both the first card holder 21 and the second card holder 23 are U-shaped. The length of the first card holder 21 is less than the depth of the inner wall of the lower housing 12. The top of the second card holder 23 is sealed to the inner top wall of the upper housing 11. The first card holder 21 and the second card holder 23 are respectively provided with a first sealing strip 211 and a second sealing strip 231 that are adapted to the thickness of the partition 221. This facilitates the first card holder 21 and the second card holder 23 to work with the first sealing strip 211 and the second sealing strip 231 to keep the partition 221 installed stably and to maintain good sealing performance. This effectively prevents the gas in the air inlet chamber from flowing from the connecting gap on the outer periphery of the partition 221 to the air outlet chamber, thereby allowing the gas to flow along the preset flow pattern under the action of the water-blocking structure 22.

[0054] Please see Figure 1-5 As shown, the drainage structure 13 includes a drain port 131 located at the bottom of the lower housing 12 and a drain valve 132 installed at the bottom of the drain port 131, so that the accumulated liquid at the bottom of the lower housing 12 can be drained through the drain port 131 when the drain valve 132 is open.

[0055] Please see Figure 1-3 As shown, a first connecting flange 111 and a second connecting flange 121 are respectively provided on the opposite side of the upper housing 11 and the lower housing 12. A third connecting flange 114 is provided at the end of the air inlet pipe 112 and the air outlet pipe 113 away from the upper housing 11. This facilitates the tight connection between the upper housing 11 and the lower housing 12 using the first connecting flange 111 and the second connecting flange 121, and the third connecting flange 114 can be used to connect the upper housing 11 to the pipeline.

[0056] The working process of the above-mentioned gas orifice plate flowmeter antifreeze device is as follows:

[0057] When installing the gas orifice plate flow meter antifreeze device, firstly, the partition plate 221 is vertically inserted into the lower housing 12 using the first mounting bracket 21. Then, the upper housing 11 is installed on the top of the lower housing 12 using the first connecting flange 111 and the second connecting flange 121, so that the partition plate 221 is inserted into the second mounting bracket 23 of the upper housing 11. Finally, the upper housing 11 is connected to the pipeline using the inlet pipe 112, and the flow meter body 3 is connected to the outlet pipe 113 using the outlet pipe 113.

[0058] During use, gas flows into the upper shell 11 through the pipe and the air inlet pipe 112, and flows along a U-shaped path inside the outer shell 1 under the action of the baffle 221 of the water-blocking structure 22. It passes through the air inlet chamber and the air outlet chamber in sequence. When the gas flows downward in the air inlet chamber, it is blocked by the first water-blocking wing 2221 when it flows from the first air hole of the upper layer to the lower layer through the staggered arrangement of the holes on the second water-blocking wing 2231 in the first water-blocking component 222. The water-blocking part of the first water-blocking wing 2221 is at the bottom, and the first air hole for air passage is at the top. Water flows downward and gas flows upward, so the gas and water will not cross, and a good separation effect can be maintained.

[0059] When the gas flows upward in the outlet chamber, it is blocked by the second water baffle 2231 when it flows from the lower second air hole to the upper layer through the staggered arrangement of holes in the second water baffle 2231. The water baffle part of the second water baffle 2231 is at the bottom and the air outlet is at the top. Water flows downward and gas flows upward, so the gas and water do not cross, which can effectively separate the liquid and thus effectively reduce the water molecule content of the gas, thereby reducing the water accumulation at the front end of the flow meter body 3.

[0060] In addition, a heating block 311 is provided inside the flow meter body 3 for heating the orifice plate structure 31. Together with the heat preservation structure provided outside the flow meter body 3, the temperature of the orifice plate structure 31 in the flow meter body 3 can be kept above zero, further preventing liquid water from freezing and affecting the accuracy of the flow meter.

[0061] Although the present invention has been disclosed above, its protection scope is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of this disclosure, and all such changes and modifications will fall within the protection scope of this invention.

Claims

1. A gas orifice plate flowmeter antifreeze device, installed on the flowmeter body (3), characterized in that, include: liquid A water separation mechanism is installed at the input end of the flow meter body (3); A heating mechanism is installed inside the flow meter body (3). An orifice plate structure (31) adapted to the inner wall of the flow meter body (3) is installed inside the flow meter body (3). The heating mechanism includes a heating block (311) installed inside the flow meter body (3) and used to heat the orifice plate structure (31) in the flow meter body (3). The liquid water separation mechanism includes a housing (1) connected to the input end of the flow meter body (3) and an inner liner (2) installed inside the housing (1). The outer casing (1) includes an upper casing (11) installed at the input end of the flow meter body (3), a lower casing (12) installed at the bottom of the upper casing (11), and a drain structure (13) installed at the bottom of the lower casing (12). The upper casing (11) is symmetrically provided with an air inlet pipe (112) and an air outlet pipe (113) on its outer periphery, and the air outlet pipe (113) is connected to the input end of the flow meter body (3). The inner liner (2) includes a first bracket (21) vertically installed on the inner wall of the upper shell (11), a second bracket (23) vertically installed on the inner wall of the lower shell (12), and a water-blocking structure (22) vertically slidably inserted on the first bracket (21) and the second bracket (23), wherein the second bracket (23) is located directly below the first bracket (21); The water-blocking structure (22) set after the gas enters the outer shell (1) is used to guide the gas to move in the outer shell (1) along a preset path, and to separate the gas and liquid by utilizing the difference in physical properties of gas and liquid.

2. The antifreeze device for a gas orifice plate flowmeter according to claim 1, characterized in that, The water-blocking structure (22) includes a partition (221) vertically slidably inserted into the first card seat (21) and the second card seat (23), and a first water-blocking component (222) and a second water-blocking component (223) respectively installed on both sides of the partition (221). The partition (221) is used to divide the inner cavity of the outer shell (1) into an air inlet cavity and an air outlet cavity. The first water-blocking component (222) and the second water-blocking component (223) are located in the air inlet cavity and the air outlet cavity respectively.

3. The antifreeze device for a gas orifice plate flowmeter according to claim 2, characterized in that, The first water-blocking component (222) includes a plurality of first water-blocking wing plates (2221) inclinedly disposed on the side of the partition plate (221) facing the air inlet cavity. Each of the first water-blocking wing plates (2221) is provided with a first vent hole group (2222) vertically. The first vent hole group (2222) includes a plurality of evenly arranged first vent holes.

4. The antifreeze device for a gas orifice plate flowmeter according to claim 3, characterized in that, The first ventilation hole groups (2222) on each of the first water deflector plates (2221) are staggered in the vertical direction. The first ventilation hole groups (2222) on the lower first water deflector plate (2221) are closer to the partition plate (221) than the first ventilation hole groups (2222) on the upper first water deflector plate (2221). The first ventilation hole groups (2222) on the lowest first water deflector plate (2221) are closest to the partition plate (221).

5. The antifreeze device for a gas orifice plate flowmeter according to claim 2, characterized in that, The second water-blocking component (223) includes several second water-blocking wing plates (2231) that are inclinedly arranged on the side of the partition plate (221) facing the air outlet chamber. Each second water-blocking wing plate (2231) is provided with a second vent hole group (2232) in a vertical direction. The second vent hole group (2232) includes several evenly arranged second vent holes.

6. The antifreeze device for a gas orifice plate flowmeter according to claim 5, characterized in that, The second vent groups (2232) on each of the second water deflectors (2231) are staggered in the vertical direction. The second vent groups (2232) on the upper second water deflector (2231) are closer to the partition (221) than the second vent groups (2232) on the lower second water deflector (2231). The second vent groups (2232) on the uppermost second water deflector (2231) are closest to the partition (221).

7. The antifreeze device for a gas orifice plate flowmeter according to claim 2, characterized in that, Both the first card holder (21) and the second card holder (23) are U-shaped. The length of the first card holder (21) is less than the depth of the inner wall of the lower housing (12). The top of the second card holder (23) is sealed to the inner top wall of the upper housing (11). The first card holder (21) and the second card holder (23) are respectively provided with a first sealing strip (211) and a second sealing strip (231) that are adapted to the thickness of the partition (221).

8. The antifreeze device for a gas orifice plate flowmeter according to claim 1, characterized in that, The drainage structure (13) includes a drain port (131) located at the bottom of the lower housing (12) and a drain valve (132) installed at the bottom of the drain port (131).

9. The antifreeze device for a gas orifice plate flowmeter according to claim 1, characterized in that, The upper housing (11) and the lower housing (12) are respectively provided with a first connecting flange (111) and a second connecting flange (121) on opposite sides, and the air inlet pipe (112) and the air outlet pipe (113) are each provided with a third connecting flange (114) at the end away from the upper housing (11).

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