High-temperature clamping device for testing steam vortex flowmeters

Abstract

This invention provides a high-temperature clamping device for testing steam vortex flow meters, relating to the field of flow meter testing fixture technology. It includes a base plate and a telescopic tube installed between the interface of the cylinder and a connecting pipe. The telescopic tube can slide along the connecting pipe and, in conjunction with an elastic structure, achieve telescopic adjustment. This allows for precise adaptation to dimensional deviations caused by thermal expansion and contraction at the connection point between the connecting pipe and the cylinder under high-temperature conditions. Even if a slight gap occurs at the connection point, the telescopic tube can tightly fit the cylinder interface under elastic force, completely filling the gap and preventing high-temperature steam leakage from the connection point. It maintains a seamless fit without additional adjustments. This solves the problem that the flange connection between the steam vortex flow meter and the test pipeline is usually fastened with bolts. Under high-temperature testing environments, the sealing structure of the bolts and flange connection will deform due to thermal expansion and contraction, leading to gaps at the flange connection and affecting the accuracy and reliability of the flow meter test results.

Description

Technical Field

[0001] This invention relates to the field of flow meter testing fixture technology, and in particular to a high-temperature clamping device for testing steam vortex flow meters. Background Technology

[0002] Steam vortex flow meters are key instruments for measuring the flow rate of steam media in industrial processes. Their measurement accuracy and stability directly affect energy consumption control and process optimization in industrial production. Therefore, in the processes of factory calibration, on-site verification, and performance testing, professional testing is required to verify their measurement characteristics. During the testing process, a clamping device must be used to accurately and firmly connect the steam vortex flow meter to the test pipeline to ensure that the test medium (high-temperature steam) flows in a closed loop between the pipeline and the flow meter, providing a stable and operating environment for testing. The testing of steam vortex flow meters under high-temperature steam conditions places stringent requirements on the high-temperature resistance, connection sealing, and installation adaptability of the clamping device: the test steam is mostly saturated steam or superheated steam, with a temperature usually in the range of 100℃~400℃, and there is a certain medium pressure in the test pipeline. The clamping device must withstand the high-temperature and high-pressure environment for a long time, and at the same time, it must achieve a tight fit with the flange of the steam vortex flow meter and the test pipeline to prevent high-temperature steam leakage from affecting the accuracy of the test data.

[0003] Currently, most clamping devices used for flow meter testing in industry are general-purpose pipe connection clamps. These clamps are not specifically designed for the structural characteristics of steam vortex flow meters and the high-temperature steam testing conditions. In practical applications, the flange connection between the steam vortex flow meter and the test pipeline is usually fastened with bolts. However, general-purpose clamping devices cannot provide targeted compression and positioning at the flange connection. Under prolonged high-temperature testing conditions, the sealing structure of the bolts and flange connection will undergo thermal expansion and contraction deformation due to high temperatures, leading to gaps at the flange connection. High-temperature steam can easily leak through these gaps, ultimately severely affecting the accuracy and reliability of the flow meter test results and failing to meet the precise testing requirements of steam vortex flow meters under high-temperature conditions. Summary of the Invention

[0004] In view of the above problems, one object of the present invention is to overcome these shortcomings, and more specifically, to provide a high-temperature clamping device for testing steam vortex flow meters, which can prevent the flow meter from experiencing a decrease in airtightness when used in a high-temperature environment.

[0005] In a first aspect, the present invention provides a high-temperature clamping device for testing a steam vortex flow meter, specifically comprising: a base plate; the base plate having a rectangular structure, and a support column provided at the bottom of the base plate, and sliding grooves provided on the side walls at the front and rear ends of the base plate; two sets of movable seats provided inside the base plate, the movable seats slidingly engaging with the movable grooves inside the base plate, two sets of movable plates slidably disposed on the upper end surface of the base plate, the mating blocks on the sides of the movable plates slidingly engaging with the sliding grooves; a connecting pipe inserted into the upright plate at the upper end of the movable seat, the connecting pipe penetrating the upright plate, a cylinder provided at the upper end of the base plate, the cylinder being located between the two sets of connecting pipes, and the joint between the cylinder and the connecting pipe being adjacent to the movable plate.

[0006] Preferably, movable grooves are symmetrically arranged on both sides of the interior of the substrate, and a lead screw is rotatably installed inside the substrate. The lead screw has a double thread structure and is threadedly connected to the movable seat.

[0007] Preferably, the movable base has a rectangular structure, and vertical through-holes are provided on both sides of the interior of the movable base.

[0008] Preferably, a bottom rod A is symmetrically provided at the bottom of the upright plate, the bottom rod A is inserted into the mounting hole, and a fixing sleeve is provided at the top side of the upright plate.

[0009] Preferably, mating blocks are provided on both sides of the interior of the movable plate, and a limit rod is inserted laterally into the side end of the mating block.

[0010] Preferably, the upper end of the movable plate is provided with a U-shaped support member, the support member has a groove with a V-shaped cross section inside, and two sets of bottom rods B are fixedly installed at the lower end of the support member, the bottom rods B are slidably engaged with the movable plate.

[0011] Preferably, a support spring is sleeved on the outer end of the base rod B, and the two sides of the support spring abut against the bottom of the support member and the upper end of the moving plate, respectively. A limit hole is provided in the interior of the base rod B in a horizontal direction, and the limit hole can be inserted and matched with the limit rod.

[0012] Preferably, the connecting pipe passes through the fixed sleeve and can move horizontally along the fixed sleeve. A flange is fitted on the outside of the connecting pipe and can slide along the end of the connecting pipe. The side end of the flange contacts the vertical plate. When the vertical plate pushes the connecting pipe, it can push the flange to move simultaneously.

[0013] Preferably, an inner groove is provided in the inner wall of the end of the connecting pipe, and a telescopic tube is slidably provided at the end of the connecting pipe. The side wall of the end of the telescopic tube is inclined, and the telescopic tube is slidably connected to the inner groove by a spring.

[0014] Preferably, a fixed flange is provided on the outside of the interface on both sides of the cylinder. The fixed flange and the flange sleeve are fixed by bolts. The outer edge of the fixed flange and the flange sleeve is in contact with the V-shaped groove on the inner side of the support. The interface on the side of the cylinder is in contact with the inclined outer wall of the end of the telescopic pipe. A flow meter is installed on the outside of the cylinder.

[0015] This invention provides a high-temperature clamping device for testing steam vortex flow meters, which has the following advantages: 1. In this invention, by setting a telescopic tube between the interface of the cylinder and the connecting pipe, the telescopic tube can slide along the connecting pipe and cooperate with the elastic structure to achieve telescopic adjustment. It can accurately adapt to the dimensional deviation caused by thermal expansion and contraction of the connecting pipe and the cylinder under high temperature environment. Even if there is a slight gap at the joint, the telescopic tube can tightly fit the interface of the cylinder under the elastic force, completely fill the gap, and prevent high temperature steam from leaking from the joint. It can maintain a seamless fit without additional adjustment, which can solve the technical shortcomings of traditional general-purpose clamps that cannot compensate for thermal expansion and contraction gaps and are prone to leakage.

[0016] 2. In this invention, a support member is provided at the joint of the cylinder and the connecting pipe. The support member provides a continuous upward clamping force through an elastic component. Its structural design that adapts to the flange shape allows the clamping force to be applied evenly to the outer edge of the flange, ensuring that the flange connection surface is tightly fitted. Even if the flange is slightly deformed or the bolts are slightly loosened in a high-temperature environment, the support member can offset the deformation effect through elastic compensation, maintain the tightness of the flange fit, and effectively prevent high-temperature steam from leaking from the flange connection. Attached Figure Description

[0017] The following accompanying drawings will provide a better understanding of the invention by those skilled in the art, and will more clearly demonstrate the advantages of the invention. The drawings described herein are for illustrative purposes only, representing selected embodiments and not all possible implementations, and are not intended to limit the scope of the invention.

[0018] In the attached diagram: Figure 1 A three-dimensional structural schematic diagram according to an embodiment of the present invention is shown.

[0019] Figure 2 An exploded structural diagram according to an embodiment of the present invention is shown.

[0020] Figure 3 A schematic diagram of the connection structure between the movable base and the substrate according to an embodiment of the present invention is shown.

[0021] Figure 4 A schematic diagram of the connection structure of the connecting pipe and the cylinder according to an embodiment of the present invention is shown.

[0022] Figure 5A schematic diagram of the connection plan of the connecting pipe and the cylinder according to an embodiment of the present invention is shown.

[0023] Figure 6 A schematic diagram of the connection structure of the vertical plate and the connecting pipe according to an embodiment of the present invention is shown.

[0024] Figure 7 A schematic diagram of the connection structure between the movable plate and the substrate according to an embodiment of the present invention is shown.

[0025] Figure 8 A schematic diagram of the connection structure between the support member and the movable plate according to an embodiment of the present invention is shown.

[0026] List of reference numerals 1. Base plate; 101. Chute; 102. Movable groove; 1021. Lead screw; 2. Movable base; 201. Mounting hole; 202. Vertical plate; 2021. Base rod A; 2022. Fixing sleeve; 3. Moving plate; 301. Mating block; 302. Limiting rod; 303, Support component; 3031, Base rod B; 304. Support spring; 305. Limiting hole; 4. Connecting pipe; 401. Flange sleeve; 402, inner groove; 4021, telescopic tube; 5. Cylinder body; 501. Fixed flange. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the described embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Example 1: Please refer to Figures 1 to 8 As shown: This invention provides a high-temperature clamping device for testing steam vortex flowmeters, comprising: a base plate 1; the base plate 1 has a rectangular structure, and a support column is provided at the bottom of the base plate 1; sliding grooves 101 are provided on the side walls of the front and rear ends of the base plate 1; two sets of movable seats 2 are provided inside the base plate 1, the movable seats 2 are slidably engaged with the movable grooves 102 inside the base plate 1; two sets of movable plates 3 are slidably provided on the upper end surface of the base plate 1, and the mating blocks 301 on the side of the movable plates 3 are slidably engaged with the sliding grooves 101; a connecting pipe 4 is inserted into the vertical plate 202 at the upper end of the movable seat 2, the connecting pipe 4 passes through the vertical plate 202; a cylinder 5 is provided at the upper end of the base plate 1, the cylinder 5 is located between the two sets of connecting pipes 4, and the joint between the cylinder 5 and the connecting pipe 4 is adjacent to the movable plate 3.

[0029] In embodiments of the present invention, such as Figure 3 and Figure 7 As shown, movable grooves 102 are symmetrically arranged on both sides of the interior of the substrate 1. A lead screw 1021 is rotatably mounted inside the substrate 1. The lead screw 1021 has a double thread structure and is threadedly connected to the movable seat 2. The substrate 1 is provided so that the movable plate 3 can be slidably arranged on the substrate 1. A sliding groove 101 is provided so that the movable plate 3 can slide along the sliding groove 101 on the substrate 1. The movable grooves 102 are provided so that the movable seats 2 can be slidably installed on both sides of the substrate 1 through the movable grooves 102. The lead screw 1021 is provided so that the two sets of movable seats 2 can be controlled to move on the substrate 1.

[0030] As a third embodiment of the present invention, based on embodiment one, such as Figure 3 As shown, the movable base 2 has a rectangular structure, and vertical through-holes 201 are provided on both sides of the interior of the movable base 2; the bottom of the upright plate 202 is symmetrically provided with bottom rods A2021, which are inserted into the mounting holes 201; a fixing sleeve 2022 is provided on the top side of the upright plate 202; the movable base 2 is provided so that the upright plate 202 can be installed on the movable base 2; the mounting holes 201 are provided so that the upright plate 202 can be inserted into the movable base 2; the upright plate 202 is provided so that the connecting pipe 4 and the cylinder 5 can be pushed to align by moving the upright plate 202, and the flange sleeve 401 can be fitted with the fixing flange 501; the bottom rods A2021 are provided so that the upright plate 202 can be fixed on the movable base 2 by inserting the bottom rods A2021 into the mounting holes 201; the fixing sleeve 2022 is provided so that the connecting pipe 4 can slide horizontally along the fixing sleeve 2022 on the top of the upright plate 202.

[0031] As a fourth embodiment of the present invention, based on embodiment one, such as Figure 8As shown, the movable plate 3 has mating blocks 301 on both sides inside, and a limit rod 302 is inserted laterally into the side end of the mating block 301; a U-shaped support member 303 is provided at the upper end of the movable plate 3, and a groove with a V-shaped cross section is provided inside the support member 303. Two sets of bottom rods B3031 are fixedly installed at the lower end of the support member 303, and the bottom rods B3031 slide with the movable plate 3; a support spring 304 is sleeved on the outer end of the bottom rod B3031, and the two sides of the support spring 304 abut against the bottom of the support member 303 and the upper end of the movable plate 3, respectively. A limit hole 305 is provided laterally inside the bottom rod B3031, and the limit hole 305 can be inserted and matched with the limit rod 302; the movable plate 3 is provided, and the support member 303 can be slidably set on the movable plate 3; A mating block 301 is provided, allowing the movable plate 3 to slide against the slide groove 101 via the mating block 301; a limiting rod 302 is provided, which, by inserting the limiting rod 302 into the limiting hole 305, can be fixed to the movable plate 3 after the support member 303 is pressed down; a support member 303 is provided, which, by being pushed by the support spring 304, can make the fixed flange 501 and the flange sleeve 401 fit tightly together; a bottom rod B3031 is provided, which allows the support member 303 to slide against the movable plate 3; a support spring 304 is provided, which can push the support member 303 to move upward; a limiting hole 305 is provided, which, by inserting the limiting rod 302 into the limiting hole 305, can fix the support member 303 on the movable plate 3.

[0032] This application moves the movable plate 3 to the joint of the flange sleeve 401 and the fixed flange 501, and makes the V-shaped groove of the upper support member 303 of the movable plate 3 fit with the outer edge of the fixed flange 501 and the flange sleeve 401. When a gap appears between the fixed flange 501 and the flange sleeve 401, the support spring 304 applies an upward force to the support member 303, which can push the flange sleeve 401 to fit with the fixed flange 501, thereby maintaining the airtightness of the connection between the connecting pipe 4 and the cylinder 5.

[0033] As a fifth embodiment of the present invention, based on embodiment one, such as Figure 4 and Figure 5As shown, the connecting pipe 4 passes through the fixed sleeve 2022 and can move horizontally along the fixed sleeve 2022. A flange sleeve 401 is fitted on the outside of the connecting pipe 4. The flange sleeve 401 can slide along the end of the connecting pipe 4. The side end of the flange sleeve 401 contacts the vertical plate 202. When the vertical plate 202 pushes the connecting pipe 4, it can push the flange sleeve 401 to move synchronously. An inner groove 402 is provided in the inner wall of the end of the connecting pipe 4. A telescopic pipe 4021 is slidably provided at the end of the connecting pipe 4. The side wall of the end of the telescopic pipe 4021 is inclined and telescopic. Pipe 4021 is slidably connected to inner groove 402 via spring engagement; connecting pipe 4 is provided, through which steam can be transported into cylinder 5; flange sleeve 401 is provided, and flange sleeve 401 is fixed to fixed flange 501 with bolts, which can seal the joint between connecting pipe 4 and cylinder 5; inner groove 402 is provided, through which telescopic pipe 4021 can be slidably installed onto connecting pipe 4; telescopic pipe 4021 is provided, and spring holds telescopic pipe 4021 against the interface at the side end of cylinder 5, which can achieve a seal between connecting pipe 4 and cylinder 5.

[0034] This application provides an inner groove 402 on the connecting pipe 4, and slides the telescopic pipe 4021 through the inner groove 402 to the end position of the connecting pipe 4. After the connecting pipe 4 and the cylinder 5 are assembled, the telescopic pipe 4021 is pushed by the spring, and its inclined side wall at the end of the cylinder 5 can be tightly attached to the interface at the side end of the cylinder 5. Therefore, no matter what kind of expansion or contraction occurs at the connection between the connecting pipe 4 and the cylinder 5, the telescopic pipe 4021 can compensate for the gap tolerance by sliding, so that the connection between the connecting pipe 4 and the cylinder 5 remains tightly fitted.

[0035] In embodiments of the present invention, such as Figure 2 As shown, fixed flanges 501 are provided on the outside of the interfaces on both sides of the cylinder 5. The fixed flanges 501 and flange sleeves 401 are fixed with bolts. The outer edges of the fixed flanges 501 and flange sleeves 401 are in contact with the V-shaped groove on the inner side of the support 303. The interface at the side end of the cylinder 5 is in contact with the inclined outer wall at the end of the telescopic pipe 4021. A flow meter is installed on the outside of the cylinder 5. The cylinder 5 is set up and fixed to the flange sleeves 401 by means of the fixed flanges 501. When steam enters the interior of the cylinder 5 through the connecting pipe 4, the external flow meter can measure the steam flow rate inside the cylinder 5.

[0036] The specific usage and function of this embodiment are as follows: In this invention, such as Figures 1 to 8As shown, the upright plate 202 is inserted into the movable seat 2 via the bottom rod A2021. The connecting pipe 4 passes through the fixed sleeve 2022 at the top side of the upright plate 202, allowing the connecting pipe 4 to slide horizontally along the fixed sleeve 2022. At the same time, the flange sleeve 401 is fitted onto the outside of the connecting pipe 4, ensuring that its side end is in close contact with the upright plate 202. Then, the cylinder 5 equipped with the flow meter is placed on the upper end of the base plate 1, positioning the cylinder 5 between the two sets of connecting pipes 4. The upright plate 202 is pushed to move the connecting pipe 4 towards the cylinder. The pipe moves in five directions, allowing the end of the connecting pipe 4 to precisely align with the side interface of the cylinder 5. At this time, the telescopic pipe 4021, which is slidably installed in the inner groove 402 of the inner wall of the end of the connecting pipe 4, extends under the action of the spring, and its inclined sidewall tightly fits against the side interface of the cylinder 5, completing the initial sealing of the pipe connection. The flange sleeve 401 and the fixed flange 501 are connected and fixed by bolts. The two sets of moving plates 3 on the upper end face of the sliding base plate 1 cause the mating block 301 on the side of the moving plate 3 to slide along the slide groove 101. The movable plate 3 is precisely moved to the joint of the flange sleeve 401 and the fixed flange 501 on both sides of the cylinder 5. The limit rod 302 is pulled out, causing the support spring 304 to push the support member 303 upward, so that the V-shaped groove inside the support member 303 fits tightly with the outer edge of the fixed flange 501 and the flange sleeve 401. At this time, the elastic force of the support spring 304 pushes the support member 303, continuously applying an upward pressing force to the fixed flange 501 and the flange sleeve 401 to ensure that the two fit tightly. High-temperature test steam is delivered into the cylinder 5 through the connecting pipe 4. The flow meter outside the cylinder 5 accurately measures the steam flow. During the test, the telescopic pipe 4021 can slide along the inner groove 402 to automatically compensate for the gap caused by the thermal expansion and contraction at the joint between the connecting pipe 4 and the cylinder 5. The support member 303 can continuously maintain the tightness and sealing of the fixed flange 501 and the flange sleeve 401 through the elastic action of the support spring 304, effectively preventing the leakage of high-temperature steam.

[0037] The following points should be noted in this article: 1. The accompanying drawings of the embodiments of the present invention only involve the structures involved in the embodiments of the present invention; other structures can refer to general designs.

[0038] 2. Where there is no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other to obtain new embodiments.

[0039] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A high temperature clamping device for use in testing a steam vortex flowmeter, comprising: The substrate (1) is rectangular and has a support column at the bottom. The front and rear side walls of the substrate (1) are provided with sliding grooves (101). The substrate (1) is characterized in that two sets of movable seats (2) are provided inside the substrate (1). The movable seats (2) are slidably engaged with the movable grooves (102) inside the substrate (1). Two sets of movable plates (3) are slidably provided on the upper surface of the substrate (1). The mating blocks (301) on the side of the movable plates (3) are slidably engaged with the sliding grooves (101). A connecting pipe (4) is inserted into the upright plate (202) at the upper end of the movable seat (2). The connecting pipe (4) passes through the upright plate (202). A cylinder (5) is provided at the upper end of the substrate (1). The cylinder (5) is located between the two sets of connecting pipes (4). The joint between the cylinder (5) and the connecting pipe (4) is adjacent to the movable plate (3).

2. The high temperature clamping device for testing a vapor vortex flowmeter according to claim 1, characterized in that: The substrate (1) has symmetrical movable grooves (102) on both sides inside. A lead screw (1021) is rotatably installed inside the substrate (1). The lead screw (1021) has a double thread structure and is threadedly connected to the movable seat (2).

3. The high-temperature clamping device for testing steam vortex flowmeters according to claim 1, characterized in that: The movable base (2) has a rectangular structure, and vertical through mounting holes (201) are provided on both sides of the interior of the movable base (2).

4. The high temperature clamping device for testing a vapor- vortex flowmeter according to claim 3, wherein: The bottom of the upright plate (202) is symmetrically provided with a bottom rod A (2021), which is inserted into the mounting hole (201). The top side of the upright plate (202) is provided with a fixing sleeve (2022).

5. The high-temperature clamping device for testing steam vortex flowmeters according to claim 1, characterized in that: The movable plate (3) has mating blocks (301) on both sides inside, and a limit rod (302) is inserted laterally into the side end of the mating block (301).

6. The high temperature clamping device for testing a vapor- vortex flowmeter according to claim 5, wherein: The upper end of the movable plate (3) is provided with a U-shaped support (303), the inside of the support (303) is provided with a groove with a V-shaped cross section, and the lower end of the support (303) is fixedly installed with two sets of bottom rods B (3031), the bottom rods B (3031) slidingly engaging with the movable plate (3).

7. The high temperature clamping device for testing a vapor- vortex flowmeter according to claim 6, wherein: The outer end of the bottom rod B (3031) is fitted with a support spring (304). The two sides of the support spring (304) abut against the bottom of the support member (303) and the upper end of the moving plate (3), respectively. The bottom rod B (3031) is provided with a limiting hole (305) in the middle. The limiting hole (305) can be inserted and matched with the limiting rod (302).

8. The high temperature clamping device for testing a vapor- vortex flowmeter according to claim 4, wherein: The connecting pipe (4) passes through the fixed sleeve (2022) and can move horizontally along the fixed sleeve (2022). The connecting pipe (4) is fitted with a flange sleeve (401). The flange sleeve (401) can slide along the end of the connecting pipe (4). The side end of the flange sleeve (401) is in contact with the vertical plate (202). When the vertical plate (202) pushes the connecting pipe (4), it can push the flange sleeve (401) to move simultaneously.

9. The high temperature clamping device for testing a vapor- vortex flowmeter of claim 1, wherein: An inner groove (402) is provided in the inner wall of the end of the connecting pipe (4), and a telescopic pipe (4021) is slidably provided at the end of the connecting pipe (4). The side wall of the end of the telescopic pipe (4021) is inclined, and the telescopic pipe (4021) is slidably connected to the inner groove (402) by means of a spring.

10. The high temperature clamping device for testing a vapor- vortex flowmeter according to claim 9, wherein: A fixed flange (501) is provided on the outside of the interface on both sides of the cylinder (5). The fixed flange (501) and the flange sleeve (401) are fixed by bolts. The outer edge of the fixed flange (501) and the flange sleeve (401) are in contact with the V-shaped groove on the inner side of the support member (303). The interface on the side end of the cylinder (5) is in contact with the inclined outer wall at the end of the telescopic pipe (4021). A flow meter is installed on the outside of the cylinder (5).

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