Dynamic thermal compensation device for horizontal flange of steam turbine

Abstract

The utility model provides a dynamic thermal compensation device for a horizontal flange of a steam turbine, and relates to the technical field of dynamic thermal compensation of flanges, the dynamic thermal compensation device comprises a middle fixing sleeve, a stroke limiting telescopic air cylinder and a controller, the middle fixing sleeve is sleeved outside the middle part of a middle pipe section, and upper connecting plates are arranged on the upper side and the lower side of the middle fixing sleeve; the middle of the upper connecting plate is sleeved with guide rods, a controller is installed in the middle of the guide rod on the lower side, multiple sets of stroke limiting telescopic air cylinders are installed on the front side and the rear side of the middle of the middle fixing sleeve correspondingly, pressing plates are fixed to the front ends of the stroke limiting telescopic air cylinders, and flanges are arranged at the left end and the right end of the middle pipe section correspondingly. Grooves are formed in the left portion and the right portion of the outer side face of the flange, the pressing plates are located in the grooves, and mounting grooves are formed in the front side and the rear side of the middle of the middle fixing sleeve. The flange thermal compensation positioning device is accurate and reliable in flange thermal compensation positioning, thermal compensation is more efficient, convenient and practical, it is guaranteed that the flange is prevented from deforming, and connection of the flange is tighter and more reliable.

Description

TECHNICAL FIELD

[0001] The utility model relates to flange dynamic heat compensation technical field, concretely relates to a steam turbine horizontal flange dynamic heat compensation device. BACKGROUND

[0002] Heat compensation refers to the measures taken to prevent the stress caused by the thermal elongation of the pipeline due to temperature rise from damaging the pipeline, and is also a means to compensate for the thermal elongation of the heating pipeline caused by heating, thereby reducing or eliminating the stress caused by thermal expansion and contraction force. The purpose is to prevent the deformation or damage of the heating pipeline due to thermal elongation or temperature stress when the heating pipeline is heated, and to reduce the stress on the valve or support structure.

[0003] In the prior art (publication number CN108050332A) a steam pipeline heat compensation device with heat shock resistance and its design method, it is mentioned that "including full annular compensation pipe, reducing pipe and flange, the full annular compensation pipe is spiral, the diameter of the full annular compensation pipe is greater than the diameter of the corresponding steam pipeline, the inlet and outlet of the full annular compensation pipe are respectively connected with the steam pipeline through the reducing pipe, and the end of the reducing pipe is provided with the flange, and the heat compensation device is connected with the steam pipeline through the flange", but the heat compensation positioning of the flange in the prior art is not accurate and stable, and the compensation is not in place, which is prone to interface deformation and leakage, and is not efficient, safe and practical. UTILITY MODEL CONTENT

[0004] In order to overcome the defects of the prior art, a steam turbine horizontal flange dynamic heat compensation device is provided to solve the problem of inaccurate and unstable heat compensation positioning of the flange in the prior art, and the compensation is not in place, which is prone to interface deformation and leakage, and is not efficient, safe and practical.

[0005] In order to achieve the above-mentioned purpose, a steam turbine horizontal flange dynamic heat compensation device is provided, which comprises a middle fixed sleeve, a stroke limiting telescopic cylinder and a controller, the middle fixed sleeve is sleeved on the middle part of the middle pipe segment, and the upper and lower sides of the middle fixed sleeve are provided with upper connecting plates, the middle part of the upper connecting plate is sleeved with a guide rod, and the middle part of the lower guide rod is provided with a controller, the middle part of the middle fixed sleeve is provided with a plurality of stroke limiting telescopic cylinders on the front and rear sides, and the front end of the stroke limiting telescopic cylinder is fixed with a pressing plate.

[0006] Further, the left and right ends of the middle pipe segment are provided with flanges, and the left and right parts of the outer side of the flange are provided with grooves, and the pressing plate is located in the groove.

[0007] Further, the middle part of the middle fixed sleeve is provided with an installation groove on the front and rear sides, and the upper and lower parts of the middle fixed sleeve are provided with screw holes, and the screw holes are provided with fastening bolts.

[0008] Furthermore, the upper connecting plate has a first set of holes, and the guide rod passes through the first set of holes, with the left and right parts of the guide rod respectively fitted into a set of second sets of holes.

[0009] Furthermore, the second hole is located in the middle of the side fixing plate, and the side fixing plate is fixed to the outside of the flange.

[0010] Furthermore, a hanger is provided outside the controller, and the upper part of the hanger is fitted over the guide rod, and a control panel is provided on the front side of the controller.

[0011] The beneficial effects of this utility model are as follows:

[0012] 1. The grooves on both the front and rear sides of the outer flange of this utility model are designed to facilitate the fitting and placement of the pressure plate. The pressure plate and the groove are easy to fit together and easy to disassemble, making it more convenient and time-saving.

[0013] 2. In this utility model, the guide rods set on the upper and lower sides are used as straight guide rod structures. When the left and right ends of the middle pipe section undergo thermal expansion due to temperature rise, the travel limit telescopic cylinders on the left and right sides of the middle fixed sleeve pull the extended part of the flange back, performing dynamic thermal compensation, which is more accurate, stable and practical.

[0014] 3. The present invention features an electrical connection between the stroke-limiting telescopic cylinder and the controller, which allows the controller to control the stroke-limiting telescopic cylinder in real time to extend forward before thermal compensation, until a certain gap is formed between the pressure plate and the flange. When thermal compensation of the flange is required, the stroke-limiting telescopic cylinder retracts and pulls back, at which point the pressure plate is re-embedded in the groove, driving the flange back to its original position to achieve the purpose of thermal compensation, making it more efficient and practical. Attached Figure Description

[0015] Figure 1 This is a front view schematic diagram of an embodiment of the present utility model;

[0016] Figure 2 This is a right-side view of an embodiment of the present utility model;

[0017] Figure 3 This is a schematic diagram of the fixing sleeve in an embodiment of the present utility model;

[0018] Figure 4 This is a schematic diagram of the travel limit telescopic cylinder of this utility model embodiment.

[0019] In the figure: 1, the middle pipe section; 10, flange; 11, groove; 2, middle fixed sleeve; 20, mounting groove; 21, screw hole; 22, fastening bolt; 23, upper connecting plate; 24, first sleeve hole; 25, side fixed plate; 26, second sleeve hole; 27, guide rod; 3, stroke limiting telescopic air cylinder; 30, pressing plate; 4, controller; 40, control panel; 41, hanger. DETAILED DESCRIPTION

[0020] In order to make the technical problems, technical solutions and beneficial effects of the utility model clearer, the utility model is further described in detail below in combination with the drawings and examples. The specific examples described herein are only used to explain the utility model and are not used to limit the utility model. Specific details such as specific system structure and technology are proposed so that the utility model examples can be understood more thoroughly. The described examples are part of the embodiments of the disclosure, not all the embodiments. However, those skilled in the art should know that the utility model can also be realized in other embodiments without these specific details. Based on the examples in the disclosure, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the disclosure.

[0021] The specific embodiments of the utility model are described in detail below in combination with the drawings.

[0022] Figure 1 is a front view schematic diagram of the utility model embodiment, Figure 2 is a right view schematic diagram of the utility model embodiment, Figure 3 is a middle fixed sleeve schematic diagram of the utility model embodiment, and Figure 4 is a stroke limiting telescopic air cylinder schematic diagram of the utility model embodiment.

[0023] Referring to Figures 1 to 4 , the utility model provides a kind of steam turbine horizontal flange dynamic heat compensation device, including middle fixed sleeve 2, stroke limiting telescopic air cylinder 3 and controller 4, middle fixed sleeve 2 is sleeved in the middle part outside of middle pipe section 1, and the upper and lower sides of middle fixed sleeve 2 are all provided with upper connecting plate 23, the middle part of upper connecting plate 23 is sleeved with guide rod 27, and the middle part of lower guide rod 27 is equipped with controller 4, the middle part of middle fixed sleeve 2 is installed with multiple groups of stroke limiting telescopic air cylinder 3 on front and back sides, and the front end of stroke limiting telescopic air cylinder 3 is fixed with pressing plate 30.

[0024] In the embodiment, the left and right ends of middle pipe section 1 are all provided with flange 10, the left and right sides of the outer side of flange 10 are all provided with groove 11, and pressing plate 30 is located in groove 11.

[0025] As a preferred embodiment, the flange 10 is provided with the groove 11 on the front and back sides, which is convenient for the pressing plate 30 to be embedded and placed, and the pressing plate 30 and the groove 11 are convenient for embedding and splitting.

[0026] In the embodiment, the middle fixing sleeve 2 is provided with the installation groove 20 on the front and back sides, and the upper and lower parts of the middle fixing sleeve 2 are provided with the screw holes 21, and the fastening bolts 22 are installed in the screw holes 21; the first sleeve hole 24 is formed in the upper connecting plate 23, the guide rods 27 pass through the first sleeve hole 24, and the left and right parts of the guide rods 27 are respectively sleeved in a group of second sleeve holes 26; the second sleeve hole 26 is located in the middle part of the side fixing plate 25, and the side fixing plate 25 is fixed to the flange 10.

[0027] As a preferred embodiment, the guide rods 27 on the upper and lower sides are used as straight guide rods, so that when the left and right ends of the middle pipe section 1 are elongated due to temperature rise, the part of the flange that is elongated is pulled back by the stroke limiting telescopic cylinder 3 on the left and right parts of the middle fixing sleeve 2, and dynamic thermal compensation is performed, which is more accurate, stable and practical.

[0028] In the embodiment, the controller 4 is provided with the hanging bracket 41, the upper part of the hanging bracket 41 is sleeved outside the guide rod 27, and the front side of the controller 4 is provided with the control panel 40.

[0029] As a preferred embodiment, the stroke limiting telescopic cylinder 3 and the controller 4 are electrically connected, so that the controller 4 can be used to control the stroke limiting telescopic cylinder 3 to be elongated forward before thermal compensation, until the pressing plate 30 and the flange 10 are spaced apart by a certain distance, and when thermal compensation of the flange is needed, the stroke limiting telescopic cylinder 3 is retracted to pull back, at this time, the pressing plate 30 is embedded in the groove 11, and the flange 10 is pulled back to the original position, so that the purpose of thermal compensation is achieved, which is more efficient and practical.

[0030] The utility model can effectively solve the problems of inaccurate and unstable thermal compensation positioning of the flange in the prior art, incomplete compensation, easy deformation of the interface, leakage, and low efficiency, safety and practicability, and the utility model has accurate and reliable thermal compensation positioning of the flange, and the thermal compensation is more efficient, convenient and practical, so that the deformation of the flange is avoided, and the connection is more compact and reliable.

[0031] The above embodiments are used to explain and illustrate the utility model, but not to limit the utility model, and any modification and change made to the utility model within the spirit and scope of the application protection right claim should be included in the protection range of the utility model.

Claims

1. A dynamic thermal compensation device for a steam turbine horizontal flange, characterized in that: The device includes a central fixed sleeve (2), a stroke limit telescopic cylinder (3), and a controller (4). The central fixed sleeve (2) is fitted outside the middle of the central pipe section (1), and upper connecting plates (23) are provided on both the upper and lower sides of the central fixed sleeve (2). A guide rod (27) is fitted in the middle of the upper connecting plate (23), and a controller (4) is installed in the middle of the lower guide rod (27). Multiple sets of stroke limit telescopic cylinders (3) are installed on both the front and rear sides of the middle of the central fixed sleeve (2), and a pressure plate (30) is fixed at the front end of the stroke limit telescopic cylinder (3).

2. The dynamic thermal compensation device for a steam turbine horizontal flange according to claim 1, characterized in that, Flanges (10) are provided at both ends of the middle pipe section (1), and grooves (11) are provided on both the left and right sides of the outer side of the flange (10), and the pressure plate (30) is located in the groove (11).

3. The dynamic thermal compensation device for a steam turbine horizontal flange according to claim 1, characterized in that, The middle fixing sleeve (2) has mounting grooves (20) on both the front and rear sides of the middle part, and screw holes (21) are provided on both the upper and lower parts of the middle fixing sleeve (2), and fastening bolts (22) are installed in the screw holes (21).

4. The dynamic thermal compensation device for a steam turbine horizontal flange according to claim 1, characterized in that, The upper connecting plate (23) has a first set of holes (24), and the guide rod (27) is set through the first set of holes (24), and the left and right parts of the guide rod (27) are respectively fitted into a set of second set of holes (26).

5. A dynamic thermal compensation device for a steam turbine horizontal flange according to claim 4, characterized in that, The second hole (26) is located in the middle of the side fixing plate (25), and the side fixing plate (25) is fixed outside the flange (10).

6. The dynamic thermal compensation device for a steam turbine horizontal flange according to claim 1, characterized in that, The controller (4) is provided with a hanger (41), and the upper part of the hanger (41) is sleeved on the guide rod (27). The controller (4) is provided with a control panel (40) on the front side.

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