A freeze protection device for a steam flowmeter

Abstract

The utility model provides an anti -freezing device suitable for steam flowmeter, including limiting part, first heating part and second heating part, limiting part sets up on pipeline flange, and it is located steam flowmeter one side, first heating part sets up on limiting part, second heating part sets up on first heating part, first heating part and second heating part cooperate and enclose the straight pipe portion below steam flowmeter top instrument, first heating part and second heating part's structure are completely same, the utility model discloses have improved the use reliability of steam flowmeter, have ensured that it can also normally use under cold environment.

Description

Technical Field

[0001] This utility model relates to an antifreeze device, and more particularly to a device that can prevent the internal freezing of a steam flow meter in a cold environment, belonging to the technical field of antifreeze equipment. Background Technology

[0002] Steam flow meters are specialized instruments for measuring the cumulative mass flow rate of steam. They are widely used in petroleum, chemical, textile, and heating industries. Because parts of the steam flow meter are exposed to the air, they are affected by cold air. When the air temperature is low, the internal instrument tube of the steam flow meter can freeze due to the low temperature, which prevents various signals from being transmitted through the instrument tube, resulting in the loss of internal parameter data of the steam pipeline. This makes it impossible for the machine room staff to accurately control the transport parameters of the steam pipeline. Therefore, an anti-freezing device is needed to ensure that the part of the steam flow meter located outside the pipeline can maintain a certain temperature in cold environments to ensure normal operation. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide an antifreeze device suitable for steam flow meters. It can effectively heat and insulate the steam flow meter, ensuring that it can still operate normally in cold environments.

[0004] The problem described in this utility model is solved by the following technical solution: An antifreeze device for a steam flow meter includes a limiting part, a first heating part, and a second heating part; the limiting part is disposed on a pipe flange and is located on one side of the steam flow meter; the first heating part is disposed on the limiting part, and the second heating part is disposed on the first heating part; the first heating part and the second heating part cooperate to surround the straight pipe section below the top of the steam flow meter; the first heating part and the second heating part have identical structures.

[0005] The aforementioned antifreeze device for steam flow meters includes a first heating section comprising a first central semi-cylinder, a first upper semi-cylinder, a first lower semi-cylinder, a first central semi-circular ring, a first upper guide rod, and a first lower guide rod. A first central semi-circular ring is centrally located on the inner wall of the first central semi-cylinder, with the first upper guide rod positioned on the top surface of the first central semi-circular ring and the first lower guide rod positioned on the bottom surface of the first central semi-circular ring. A guide hole is provided at the bottom of the first upper semi-cylinder, and the first upper guide rod is inserted into the guide hole at the bottom of the first upper semi-cylinder. The outer wall of the first upper semi-cylinder is in close contact with the inner wall of the first central semi-cylinder. A guide hole is provided at the top of the first lower semi-cylinder, and the first lower guide rod is inserted into the guide hole at the bottom of the first upper semi-cylinder. Inside the guide hole at the top of the first lower cylinder, the outer wall of the first lower cylinder is in close contact with the inner wall of the first central cylinder; a semi-circular sealing gasket is provided at the top of the inner wall of the first upper cylinder, and a semi-circular sealing gasket is provided at the bottom of the inner wall of the first lower cylinder; a mating plate is provided at the center of both ends of the outer wall of the first central cylinder, and a threaded hole is provided on the mating plate; a thermocouple is provided on the inner wall of the first central semi-circular ring, and the signal output end of the thermocouple is connected to the signal input end of the CPU; a silicone heating pad is provided on the inner wall of both the first upper cylinder and the inner wall of the first lower cylinder, and the silicone heating pad is connected to a solid-state relay, and the signal input end of the solid-state relay is connected to the signal output end of the CPU.

[0006] The aforementioned antifreeze device for steam flow meters includes a second heating section comprising a second central semi-cylinder, a second upper semi-cylinder, a second lower semi-cylinder, a second central semi-circular ring, a second upper guide rod, and a second lower guide rod. A second central semi-circular ring is centrally located on the inner wall of the second central semi-cylinder, with the second upper guide rod positioned on the top surface of the ring and the second lower guide rod positioned on the bottom surface. A guide hole is located at the bottom of the second upper semi-cylinder, and the second upper guide rod is inserted into the guide hole at the bottom of the second upper semi-cylinder. The outer wall of the second upper semi-cylinder is in close contact with the inner wall of the second central semi-cylinder. A guide hole is provided at the top of the half-cylinder, and the second lower guide rod is inserted into the guide hole at the top of the second lower half-cylinder. The outer wall of the second lower half-cylinder is in close contact with the inner wall of the second central half-cylinder. A semi-circular sealing gasket is provided at the top of the inner wall of the second upper half-cylinder, and a semi-circular sealing gasket is provided at the bottom of the inner wall of the second lower half-cylinder. A mating plate is provided at the center of both ends of the outer wall of the second central half-cylinder, and a threaded hole is provided on the mating plate. Silicone heating pads are provided on the inner walls of the second upper half-cylinder and the inner walls of the second lower half-cylinder. The silicone heating pads are connected to the solid-state relay, and the signal input terminal of the solid-state relay is connected to the signal output terminal of the CPU.

[0007] The above-mentioned antifreeze device for steam flow meters has two connecting plates of the first central half-cylinder respectively contacting the two connecting plates of the second central half-cylinder, and bolts passing through the threaded holes of the two contacting connecting plates, with the other end of the bolts being tightened by nuts; the first central half-cylinder and the second central half-cylinder are combined into a complete cylindrical shape, the first upper half-cylinder and the second upper half-cylinder are combined into a complete cylindrical shape, the first lower half-cylinder and the second lower half-cylinder are combined into a complete cylindrical shape, and the two semi-circular sealing gaskets are combined into a complete annular sealing gasket, which is tightly pressed against the outer wall of the straight pipe section below the top instrument of the steam flow meter.

[0008] The aforementioned antifreeze device for steam flow meters includes a limiting part comprising an inner fixed plate, an outer fixed plate, a connecting plate, a clamping plate, a screw, a vertical plate, a lifting plate, and a sliding plate. A connecting plate connects the top of the inner fixed plate to the top of the outer fixed plate. A guide hole is provided on the clamping plate, and the connecting plate passes through the guide hole. A threaded hole is provided at the center of the outer fixed plate, and the screw passes through the central threaded hole of the outer fixed plate. One end of the screw has a knob, and the other end is axially connected to the side wall of the clamping plate. The pipe flange is clamped between the clamping plate and the inner fixed plate. The vertical plate is located on the top surface of the inner fixed plate, and a hole is provided at the top of the vertical plate. The lifting plate is inserted into the hole at the top of the vertical plate. A threaded hole is provided on the side wall of the vertical plate, and a bolt passes through the threaded hole on the side wall of the vertical plate and presses against the lifting plate. A square hole is provided at the top of the lifting plate, and a sliding plate passes through the square hole. A threaded hole is provided at the top of the lifting plate, and a bolt passes through the threaded hole on the lifting plate and presses against the sliding plate. One end of the sliding plate is connected to the center of the outer wall of the first central semi-cylinder.

[0009] This utility model fixes the position of the heating part by limiting the part, ensuring that it can reliably heat the steam flow meter; through the cooperation of the first heating part and the second heating part, the straight pipe part below the top of the steam flow meter is surrounded and heated and insulated, ensuring that it can operate normally in cold conditions; through the cooperation of the central half-bucket and the upper and lower half-buckets, the length of the enclosure is adjustable, adapting to steam flow meters of different sizes and lengths. Attached Figure Description

[0010] Figure 1 This is a three-dimensional structural diagram of the present invention in use. Figure 2 This is a schematic diagram of the internal structure of the first heating part of this utility model.

[0011] The list of labels in the diagram is as follows: 1. First central half-cylinder, 2. First upper half-cylinder, 3. First lower half-cylinder, 4. First central semi-circular ring, 5. First upper guide rod, 6. First lower guide rod, 7. Second central half-cylinder, 8. Second upper half-cylinder, 9. Second lower half-cylinder, 10. Connecting plate, 11. Inner fixing plate, 12. Outer fixing plate, 13. Connecting plate, 14. Clamping plate, 15. Screw, 16. Vertical plate, 17. Lifting plate, 18. Slide plate, 19. Steam flow meter. Detailed Implementation

[0012] See Figure 1 and Figure 2 This utility model includes a limiting part, a first heating part, and a second heating part. The limiting part is disposed on the pipe flange and is located on one side of the steam flow meter 19. Flanges exist on both sides of the steam flow meter body, and the limiting part is fixed to the flange next to the steam flow meter. The first heating part is disposed on the limiting part, and the second heating part is disposed on the first heating part. The first heating part and the second heating part cooperate to surround the straight pipe section below the top instrument of the steam flow meter 19, and insulate the straight pipe section by isolating cold air and heating the interior. The first heating part and the second heating part have identical structures. When the two parts are combined, they can surround the straight pipe section, ultimately achieving the purpose of cold insulation and heating.

[0013] The first heating section includes a first central semi-cylinder 1, a first upper semi-cylinder 2, a first lower semi-cylinder 3, a first central semi-circular ring 4, a first upper guide rod 5, and a first lower guide rod 6. The first central semi-circular ring 4 is located at the center of the inner wall of the first central semi-cylinder 1, and the first upper guide rod 5 is located on the top surface of the first central semi-circular ring 4, while the first lower guide rod 6 is located on the bottom surface of the first central semi-circular ring 4. A guide hole is provided at the bottom end of the first upper semi-cylinder 2, and the first upper guide rod 5 is inserted into the guide hole at the bottom end of the first upper semi-cylinder 2, allowing the first upper semi-cylinder 2 to move up and down to adjust its position via the first upper guide rod 5. The outer wall of the upper half-cylinder 2 is in close contact with the inner wall of the first central half-cylinder 1. The top of the first lower half-cylinder 3 is provided with a guide hole, and the first lower guide rod 6 is inserted into the guide hole at the top of the first lower half-cylinder 3. The outer wall of the first lower half-cylinder 3 is in close contact with the inner wall of the first central half-cylinder 1. The first lower guide rod 6 allows the first lower half-cylinder to move up and down freely to adjust its position. The top of the inner wall of the first upper half-cylinder 2 is provided with a semi-circular sealing gasket, and the bottom of the inner wall of the first lower half-cylinder 3 is provided with a semi-circular sealing gasket. Both the upper and lower ends of the cylinder assembly are joined with annular sealing gaskets, which makes the inside of the cylinder assembly in a sealed state and achieves a better heat preservation effect.

[0014] Both ends of the outer wall of the first central semi-cylinder 1 are provided with docking plates 10, and the docking plates 10 are provided with threaded holes; a thermocouple is provided on the inner wall of the first central semi-circular ring 4, and the signal output end of the thermocouple is connected to the signal input end of the CPU; the thermocouple can monitor the internal temperature of the cylinder in real time to ensure that the internal temperature of the combined cylinder is within a reasonable range. The so-called combined cylinder refers to the triple-cylinder closed cavity formed by merging the various cylinders together; silicone heating pads are provided on the inner walls of the first upper semi-cylinder 2 and the first lower semi-cylinder 3, and the silicone heating pads are connected to solid-state relays, and the signal input end of the solid-state relays is connected to the signal output end of the CPU; the silicone heating pads heat the inside of the cylinder assembly, thereby maintaining a certain temperature range.

[0015] The principle of the second heating part is completely the same as that of the first heating part; the second heating part includes a second central semi-cylinder 7, a second upper semi-cylinder 8, a second lower semi-cylinder 9, a second central semi-circular ring, a second upper guide rod, and a second lower guide rod; the second central semi-circular ring is provided at the center of the inner wall of the second central semi-cylinder 7, and the second upper guide rod is provided on the top surface of the second central semi-circular ring, and the second lower guide rod is provided on the bottom surface of the second central semi-circular ring; a guide hole is provided at the bottom end of the second upper semi-cylinder 8, and the second upper guide rod is inserted into the guide hole at the bottom end of the second upper semi-cylinder 8; the outer wall of the second upper semi-cylinder 8 is in close contact with the inner wall of the second central semi-cylinder 7. The top of the second lower half-cylinder 9 is provided with a guide hole, and the second lower guide rod is inserted into the guide hole at the top of the second lower half-cylinder 9. The outer wall of the second lower half-cylinder 9 is in close contact with the inner wall of the second central half-cylinder 7. The top of the inner wall of the second upper half-cylinder 8 is provided with a semi-circular sealing gasket, and the bottom of the inner wall of the second lower half-cylinder 9 is provided with a semi-circular sealing gasket. Both ends of the outer wall of the second central half-cylinder 7 are provided with a mating plate 10, and the mating plate 10 is provided with a threaded hole. The inner walls of the second upper half-cylinder 8 and the inner walls of the second lower half-cylinder 9 are provided with silicone heating pads. The silicone heating pads are connected to a solid-state relay, and the signal input terminal of the solid-state relay is connected to the signal output terminal of the CPU.

[0016] The two connecting plates 10 of the first central half-cylinder 1 respectively connect with the two connecting plates 10 of the second central half-cylinder 7, and the bolts pass through the threaded holes of the two connecting plates 10, and the other end of the bolts is fastened by nuts; the bolts can fix the merging of the two central half-cylinders, and the two central half-cylinders also drive the merging of each upper half-cylinder and each lower half-cylinder; the first central half-cylinder 1 and the second central half-cylinder 7 merge into a complete cylindrical shape, the first upper half-cylinder 2 and the second upper half-cylinder 8 merge into a complete cylindrical shape, the first lower half-cylinder 3 and the second lower half-cylinder 9 merge into a complete cylindrical shape, and the two semi-circular sealing gaskets merge into a complete annular sealing gasket, which is tightly pressed against the outer wall of the straight pipe section below the top instrument of the steam flow meter 19; the combination of the two upper half-cylinders, the combination of the two central half-cylinders and the combination of the two lower half-cylinders form a cylindrical closed combined cavity.

[0017] The function of the limiting part is to prevent the cylinder assembly from sliding. The limiting part includes an inner fixing plate 11, an outer fixing plate 12, a connecting plate 13, a clamping plate 14, a screw 15, a vertical plate 16, a lifting plate 17, and a sliding plate 18. The top end of the inner fixing plate 11 is connected to the top end of the outer fixing plate 12 by the connecting plate 13. The clamping plate 14 is provided with a guide hole, and the connecting plate 13 passes through the guide hole of the clamping plate 14. The clamping plate 14 can move under the guidance of the connecting plate 13. The center of the outer fixing plate 12 is provided with a threaded hole, and the screw 15 passes through the center threaded hole of the outer fixing plate 12. One end of the screw 15 is provided with a knob, and the other end is axially connected to the side wall of the clamping plate 14. Rotating the knob will drive the screw 15 to rotate, which will drive the clamping plate 14 forward. Finally, the clamping plate 14 and the inner fixing plate 11 fix and clamp the flange. The pipe flange is clamped in the middle by the clamping plate 14 and the inner fixing plate 11.

[0018] The upright plate 16 is disposed on the top surface of the inner fixing plate 11. The top of the upright plate 16 is provided with a hole, and the lifting plate 17 is inserted into the hole at the top of the upright plate 16. The side wall of the upright plate 16 is provided with a threaded hole, and the bolt passes through the threaded hole on the side wall of the upright plate 16 and presses against the lifting plate 17. Tightening the threaded hole on the side wall of the upright plate 16 can fix the position of the lifting plate 17. The top of the lifting plate 17 is provided with a square hole, and a sliding plate 18 passes through the square hole. The top of the lifting plate 17 is provided with a threaded hole, and the bolt passes through the threaded hole on the lifting plate 17 and presses against the sliding plate 18. One end of the sliding plate 18 is connected to the center of the outer wall of the first central half-cylinder 1. By adjusting the position of the sliding plate 18 laterally, the position of the first central half-cylinder 1 can be adjusted to ensure that the first central half-cylinder 1 can surround the steam flow meter in a suitable position.

[0019] The CPU module in this invention is model 87C196KC.

[0020] Operating principle: This device should be pre-installed before the arrival of cold weather; The inner fixing plate 11 of this device is attached to the inner wall of the flange, and the screw is rotated to bring the clamping plate 14 close to the inner fixing plate and clamp the flange. The positions of the inner fixing plate 11 and the clamping plate 14 are finely adjusted so that when the sliding plate 18 is adjusted, the first central half-cylinder 1 can fit well against the outer wall of the straight pipe section of the steam flow meter. Then the screw is tightened so that the clamping plate 14 and the inner fixing plate 11 tightly clamp the flange and no longer move. Then the position of the lifting plate 17 is adjusted so that the height of the center point of the first central half-cylinder is consistent with the height of the center point of the straight pipe section of the steam flow meter 19. Then the bolts on the vertical plate 16 are tightened. Then the sliding plate 18 is slid to bring the first central half-cylinder 1 close to the straight pipe section of the steam flow meter. After the first central half-cylinder 1 is close, the second central half-cylinder 7 is fastened and secured with bolts. Connect the two center half-cylinders with the connecting plate 10, but at this time the bolts are only connected to the connecting plate 10 and not tightened; at this time the two upper half-cylinders and the lower half-cylinders can still move; then adjust the position of the first upper half-cylinder and the second upper half-cylinder so that their edges are completely in contact and simultaneously pulled upwards until they move to the maximum extent that they can move. Similarly, the lower half-cylinder moves downwards to the maximum extent that it can move. At this time, the cylinder assembly surrounds the part of the steam flow meter's straight pipe section that can be surrounded as much as possible. Finally, tighten the bolts of the connecting plate 10. At this time, each half-cylinder is pulled together. The sealing gasket between the upper half-cylinders tightly clamps the top of the steam flow meter's straight pipe section and cannot move up or down. The sealing gasket between the lower half-cylinders tightly clamps the bottom of the steam flow meter's straight pipe section and cannot move up or down. At this time, the position of each half-cylinder is fixed. Finally, the thermocouple and silicone heating element are activated. The silicone heating element heats and keeps the cavity inside the cylinder warm. The thermocouple is used to detect the temperature inside the cavity and control the heating of the silicone heating element to ensure that the temperature inside the cylinder is kept within a reasonable range.

Claims

1. An antifreeze device suitable for steam flow meters, characterized in that: It includes a limiting part, a first heating part and a second heating part; the limiting part is set on the pipe flange and is located on one side of the steam flow meter (19); the first heating part is set on the limiting part and the second heating part is set on the first heating part; the first heating part and the second heating part cooperate to surround the straight pipe section below the top instrument of the steam flow meter (19); the first heating part and the second heating part have the same structure.

2. The antifreeze device for steam flow meters according to claim 1, characterized in that: The first heating part includes a first central semi-cylinder (1), a first upper semi-cylinder (2), a first lower semi-cylinder (3), a first central semi-circular ring (4), a first upper guide rod (5), and a first lower guide rod (6); the first central semi-circular ring (4) is provided at the center of the inner wall of the first central semi-cylinder (1), and the first upper guide rod (5) is provided on the top surface of the first central semi-circular ring (4), and the first lower guide rod (6) is provided on the bottom surface of the first central semi-circular ring (4); the bottom end of the first upper semi-cylinder (2) is provided with a guide hole, and the first upper guide rod (5) is inserted into the guide hole at the bottom end of the first upper semi-cylinder (2), the outer wall of the first upper semi-cylinder (2) is in close contact with the inner wall of the first central semi-cylinder (1), the top end of the first lower semi-cylinder (3) is provided with a guide hole, and the first lower guide rod (6) is provided in the guide hole at the bottom end of the first upper semi-cylinder (2). The first lower cylinder (3) is inserted into the guide hole at the top of the first lower cylinder (3), and the outer wall of the first lower cylinder (3) is in close contact with the inner wall of the first central cylinder (1); a half-circle sealing gasket is provided at the top of the inner wall of the first upper cylinder (2), and a half-circle sealing gasket is provided at the bottom of the inner wall of the first lower cylinder (3); a docking plate (10) is provided at the center of both ends of the outer wall of the first central cylinder (1), and a threaded hole is provided on the docking plate (10); a thermocouple is provided on the inner wall of the first central semicircular ring (4), and the signal output end of the thermocouple is connected to the signal input end of the CPU; a silicone heating pad is provided on the inner wall of the first upper cylinder (2) and the inner wall of the first lower cylinder (3), and the silicone heating pad is connected to the solid-state relay, and the signal input end of the solid-state relay is connected to the signal output end of the CPU.

3. The antifreeze device for steam flow meters according to claim 2, characterized in that: The second heating part includes a second central semi-cylinder (7), a second upper semi-cylinder (8), a second lower semi-cylinder (9), a second central semi-circular ring, a second upper guide rod, and a second lower guide rod. A second central semi-circular ring is provided at the center of the inner wall of the second central semi-cylinder (7), and the second upper guide rod is located on the top surface of the second central semi-circular ring, while the second lower guide rod is located on the bottom surface of the second central semi-circular ring. A guide hole is provided at the bottom end of the second upper semi-cylinder (8), and the second upper guide rod is inserted into the guide hole at the bottom end of the second upper semi-cylinder (8). The outer wall of the second upper semi-cylinder (8) is in close contact with the inner wall of the second central semi-cylinder (7). A guide rod is provided at the top end of the second lower semi-cylinder (9). The second lower guide rod is inserted into the guide hole at the top of the second lower half cylinder (9), and the outer wall of the second lower half cylinder (9) is in close contact with the inner wall of the second central half cylinder (7); a half-circle sealing gasket is provided at the top of the inner wall of the second upper half cylinder (8), and a half-circle sealing gasket is provided at the bottom of the inner wall of the second lower half cylinder (9); a docking plate (10) is provided at the center of both ends of the outer wall of the second central half cylinder (7), and a threaded hole is provided on the docking plate (10); a silicone heating pad is provided on the inner wall of the second upper half cylinder (8) and the inner wall of the second lower half cylinder (9), the silicone heating pad is connected to the solid-state relay, and the signal input terminal of the solid-state relay is connected to the signal output terminal of the CPU.

4. The antifreeze device for steam flow meters according to claim 3, characterized in that: The two connecting plates (10) of the first central half cylinder (1) respectively connect with the two connecting plates (10) of the second central half cylinder (7), and the bolt passes through the threaded holes of the two connecting plates (10), and the other end of the bolt is fastened by the nut; the first central half cylinder (1) and the second central half cylinder (7) are combined into a complete cylindrical shape, the first upper half cylinder (2) and the second upper half cylinder (8) are combined into a complete cylindrical shape, the first lower half cylinder (3) and the second lower half cylinder (9) are combined into a complete cylindrical shape, and the two half-circle sealing gaskets are combined into a complete annular sealing gasket, and it is pressed tightly against the outer wall of the straight pipe section below the top instrument of the steam flow meter (19).

5. The antifreeze device for steam flow meters according to claim 4, characterized in that: The limiting part includes an inner fixing plate (11), an outer fixing plate (12), a connecting plate (13), a clamping plate (14), a screw (15), a vertical plate (16), a lifting plate (17), and a sliding plate (18); the top of the inner fixing plate (11) is connected to the top of the outer fixing plate (12) by a connecting plate (13); the clamping plate (14) is provided with a guide hole, and the connecting plate (13) passes through the guide hole of the clamping plate (14); the center of the outer fixing plate (12) is provided with a threaded hole, and the screw (15) passes through the center threaded hole of the outer fixing plate (12), one end of the screw (15) is provided with a knob, and the other end is axially connected to the side wall of the clamping plate (14); the pipe flange is clamped by the clamping plate (11). 4) and the inner fixing plate (11) are clamped in the middle; the upright plate (16) is set on the top surface of the inner fixing plate (11), the top of the upright plate (16) is provided with a hole, and the lifting plate (17) is inserted into the hole at the top of the upright plate (16). The side wall of the upright plate (16) is provided with a threaded hole, and the bolt passes through the threaded hole on the side wall of the upright plate (16) and presses against the lifting plate (17); the top of the lifting plate (17) is provided with a square hole, and a sliding plate (18) passes through the square hole; the top of the lifting plate (17) is provided with a threaded hole, and the bolt passes through the threaded hole of the lifting plate (17) and presses against the sliding plate (18); one end of the sliding plate (18) is connected to the center of the outer wall of the first central half cylinder (1).

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