Loading device for high-pressure bypass system

Abstract

The invention relates to a loading device for a high-pressure bypass system, the high-pressure bypass system comprises a hydraulic servo-motor, the loading device for the high-pressure bypass system comprises an outer cover shell, one end of the outer cover shell is open and is used for being arranged above the hydraulic servo-motor, and the opening is used for being arranged towards the hydraulic servo-motor; the outer cover shell is used for being connected with the hydraulic servo-motor through the distance adjusting assembly; and the elastic assembly is at least partially arranged in the outer housing in a compressed manner, one end of the elastic assembly is fixedly connected to the outer housing, and the other end of the elastic assembly is used for being connected with the input end of a valve rod of the hydraulic servo-motor through the opening. According to the loading device for the high-pressure bypass system, it can be ensured that the high-pressure bypass valve can be reliably sealed, and therefore inner leakage is avoided.

Description

Technical Field

[0001] The present disclosure relates to the technical field of valve auxiliary devices, and in particular to a loading device for a high-pressure bypass system. Background Art

[0002] The high-pressure bypass system is an important part of the thermal system of modern unit units. It removes the excess steam flow generated by the boiler through the bypass system, adjusts the opening of the high-pressure bypass valve (also known as the high-pressure bypass valve) to control the main steam pressure, adapts to the requirements of the main steam pressure at each stage of the unit startup, and ensures that the boiler operates at the allowable steam flow, so as to ensure the safety, flexibility and load adaptability of the unit operation. Among them, when the unit is started with the medium-pressure cylinder under various working conditions, the high-pressure bypass system can control the boiler to quickly increase the steam temperature so that it matches the metal temperature of the steam turbine cylinder more quickly, reduce the loss of the steam turbine cycle life, and achieve the best startup state of the unit; when the unit is operating normally, the high-pressure bypass system plays the role of overpressure safety protection. For example, when the boiler is overpressured, the high-pressure bypass valve will open to reduce the action of the safety valve, and when the unit is started, shut down, or tripped abnormally, the bypass valve can quickly act to release pressure to ensure the safety of the unit operation.

[0003] The high bypass valve is the core component of the high-pressure bypass system, responsible for guiding steam to bypass the high-pressure cylinder of the steam turbine. During use, it often causes internal leakage due to slag inclusion on the sealing surface, oil leakage between the upper and lower cylinders of the hydraulic motor, and abnormal high bypass valve instructions in the DCS (Distributed Control System), thus affecting its own performance.

[0004] Therefore, a device is urgently needed to solve the internal leakage problem of the high bypass valve. Summary of the invention

[0005] An object of the present disclosure is to provide a loading device for a high-pressure bypass system, which can ensure that a high bypass valve can be reliably sealed to avoid internal leakage.

[0006] In order to achieve the above-mentioned purpose, the present disclosure provides a loading device for a high-pressure bypass system, wherein the high-pressure bypass system includes an oil motor, and the loading device for the high-pressure bypass system includes: an outer cover shell, one end of which is open and is used to be arranged above the oil motor, wherein the opening is used to be arranged toward the oil motor; a distance adjustment component, the outer cover shell is used to be connected to the oil motor through the distance adjustment component; and an elastic component, which is at least partially compressed and arranged inside the outer cover shell and has one end fixedly connected to the outer cover shell, and the other end is used to be connected to the input end of the valve stem of the oil motor through the opening.

[0007] Optionally, the outer cover shell includes a shell body and an end cover, the shell body is fixed on the end cover and separates the end cover into an outer area and an inner area, a first connecting portion is provided on the outer area, the distance adjustment assembly is used to connect with the oil motor through the first connecting portion, and the opening is formed on the inner area.

[0008] Optionally, the elastic component includes a valve stem pressure plate and an elastic member, the valve stem pressure plate is arranged in the outer cover shell and is fixed to the outer cover shell through the elastic member, and the end of the valve stem pressure plate away from the elastic member is used to connect with the input end of the valve stem.

[0009] Optionally, a guide portion is provided on the inner wall of the shell body along the height direction, and a matching portion is provided on the outer periphery of the valve stem pressure plate, and the matching portion is slidably matched with the guide portion.

[0010] Optionally, the guide portion is constructed as a convex strip arranged on the inner wall of the shell body, the convex strip extends along the height direction of the shell body, and the matching portion is constructed as a groove opened on the outer periphery of the valve stem pressure plate, and the groove is slidably arranged on the convex strip.

[0011] Optionally, the elastic component further comprises a sleeve, which is fixedly mounted on a side of the valve stem pressure plate away from the elastic member and is used to be sleeved on an input end of the valve stem.

[0012] Optionally, the elastic component further comprises a positioning block, the positioning block is fixed at the center position of the valve stem pressure plate and is arranged away from the opening, and the elastic member is sleeved on the positioning block.

[0013] Optionally, the loading device for the high-pressure bypass system also includes a chassis and a connecting assembly, the chassis is used to be arranged between the outer cover shell and the oil motor, the chassis includes a second connecting part, a third connecting part and a through hole for the valve stem to pass through, the distance adjustment assembly connects the outer cover shell and the chassis through the first connecting part and the second connecting part, and the connecting assembly is used to connect the chassis and the oil motor through the third connecting part, wherein the through hole, the third connecting part and the second connecting part are arranged in sequence from the inside to the outside along the radial direction of the chassis itself.

[0014] Optionally, the distance adjustment assembly includes an adjusting bolt and an adjusting nut, the first connecting part is configured as a first through hole, the connecting assembly includes a connecting bolt and a connecting nut, the second connecting part is configured as a second through hole, and the third connecting part is configured as a third through hole, the adjusting bolt passes through the first through hole and the second through hole and is locked and fixed with the adjusting nut, and the connecting bolt passes through the third through hole for connecting to the oil motor and is locked and fixed by the connecting nut.

[0015] Optionally, a hanger is provided on the top of the outer cover shell, and the hanger has a hanger hole.

[0016] Through the above technical solution, in the loading device for the high-pressure bypass system provided by the present disclosure, the distance between the outer cover shell and the oil motor can be adjusted by the distance adjustment component, so that the elastic component arranged inside the outer cover shell can be compressed to different degrees and thus generate different magnitudes of rebound force, so that even if there are different degrees of internal leakage in the high bypass valve, the compression degree of the elastic component can be adjusted so that the elastic component can apply a corresponding magnitude of force to the high bypass valve through the valve stem of the oil motor, so that the high bypass valve can be sealed to avoid internal leakage. It should be noted that the loading device for the high-pressure bypass system provided by the present disclosure is suitable for high bypass valves with oil leakage of 1% to 5%, and the height size of the outer cover shell needs to be selected to ensure that the elastic component therein is always in a compressed state.

[0017] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings: Figure 1 is a usage state diagram of a loading device for a high-pressure bypass system provided by an exemplary embodiment of the present disclosure; Figure 2 is a schematic structural diagram of an outer casing in a loading device for a high-voltage bypass system provided by an exemplary embodiment of the present disclosure, wherein the sling is omitted; Figure 3 is a schematic structural diagram of an end cover in a loading device for a high-pressure bypass system provided by an exemplary embodiment of the present disclosure; Figure 4 is a structural schematic diagram of a valve stem pressure plate in a loading device for a high-pressure bypass system provided by an exemplary embodiment of the present disclosure; Figure 5 is another structural schematic diagram of a valve stem pressure plate in a loading device for a high-pressure bypass system provided by an exemplary embodiment of the present disclosure; Figure 6 It is a schematic structural diagram of a chassis in a loading device for a high-voltage bypass system provided by an exemplary embodiment of the present disclosure.

[0019] Description of Reference Numerals 1-outer cover shell; 11-shell body; 111-guide part; 12-end cover; 121-outer area; 1211-first connecting part; 122-inner area; 1221-opening; 2-distance adjustment assembly; 21-adjusting bolt; 22-adjusting nut; 3-elastic assembly; 31-valve stem pressure plate; 311-matching part; 32-elastic member; 33-sleeve; 34-positioning block; 4-chassis; 41-through hole; 42-second connecting part; 43-third connecting part; 5-connecting assembly; 51-connecting bolt; 52-connecting nut; 6-hanging device; 61-hanging hole; 7-oil motor; 71-valve stem; 72-oil motor body; 73-upper cover. DETAILED DESCRIPTION

[0020] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0021] In the present disclosure, unless otherwise stated, directional words such as "upper, lower, top, and bottom" are used to refer to the upper, lower, top, and bottom in the direction of gravity in actual use, wherein the directions "upper and lower" correspond to Figure 1 and Figure 2 The upper and lower positions in the drawings. In addition, "inside and outside" refer to the "inside and outside" relative to the contour of the corresponding component itself. In addition, the terms "first", "second", "third", etc. used in the present disclosure are to distinguish one element from another and have no sequential order or importance. In addition, in the following description, when referring to the drawings, unless otherwise explained, the same figure numbers in different drawings represent the same or similar elements. The above definitions are only used to explain and illustrate the present disclosure and should not be understood as limitations on the present disclosure.

[0022] The present disclosure provides a loading device for a high-voltage bypass system, referring to Figure 1 As shown in the figure, the high-pressure bypass system includes an oil motor 7, and the loading device for the high-pressure bypass system includes: an outer cover shell 1, one end of the outer cover shell 1 has an opening 1221 and is used to be arranged above the oil motor 7, wherein the opening 1221 is used to be arranged toward the oil motor 7; a distance adjustment component 2, the outer cover shell 1 is used to be connected to the oil motor 7 through the distance adjustment component 2; and an elastic component 3, which is at least partially compressed and arranged inside the outer cover shell 1 and one end is fixedly connected to the outer cover shell 1, and the other end is used to be connected to the input end of the valve stem 71 of the oil motor 7 through the opening 1221.

[0023] Through the above technical solution, in the loading device for the high-pressure bypass system provided by the present disclosure, the distance between the outer cover shell 1 and the oil motor 7 can be adjusted by the distance adjustment component 2, so that the elastic component 3 arranged inside the outer cover shell 1 can be compressed to different degrees and thus generate different magnitudes of rebound force, so that even if there are different degrees of internal leakage in the high bypass valve, the compression degree of the elastic component 3 can be adjusted to make the elastic component 3 apply a corresponding magnitude of force to the high bypass valve through the valve stem 71 of the oil motor 7, so that the high bypass valve can be sealed to avoid internal leakage. It should be noted that the loading device for the high-pressure bypass system provided by the present disclosure is suitable for high bypass valves with oil leakage of 1% to 5%, and the height size of the outer cover shell 1 needs to be selected to ensure that the elastic component 3 therein is always in a compressed state.

[0024] In the exemplary embodiments provided in the present disclosure, reference is made to Figures 1 to 3 As shown in the figure, the outer cover shell 1 may include a shell body 11 and an end cover 12, the shell body 11 is fixed on the end cover 12 and divides the end cover 12 into an outer area 121 and an inner area 122, the outer area 121 is provided with a first connecting portion 1211, the distance adjustment component 2 is used to connect with the oil motor 7 through the first connecting portion 1211, and an opening 1221 is formed on the inner area 122. Through such a setting, on the one hand, the first connecting portion 1211 can be set on the outer area 121 of the end cover 12 to facilitate the operator's connection operation between the outer cover shell 1 and the oil motor 7; on the other hand, part of the elastic component 3 can also be confined in the chamber formed by the shell body 11 and the end cover 12 to ensure that the elastic component 3 is always in a compressed state and can adjust the distance between the outer cover shell 1 and the oil motor 7 through the distance adjustment component 2, thereby changing the compression degree of the elastic component 3 so that the elastic component 3 has different sizes of rebound force.

[0025] It should be noted that the above-mentioned oil motor 7 includes a valve stem 71, an oil motor body 72 and an upper cover 73. The upper cover 73 is detachably covered on the oil motor body 72, and the valve stem 71 passes through the upper cover 73 and the oil motor body 72 to be connected to the valve cover of the high bypass valve. The distance adjustment component 2 is specifically connected to the upper cover 73 and the oil motor body 72 of the oil motor 7 through the first connecting part 1211. In this way, the opening and closing of the valve cover of the high bypass valve connected to the valve stem 71 can be controlled by controlling the up and down movement of the valve stem 71.

[0026] In the exemplary embodiments provided in the present disclosure, reference is made to Figure 1As shown in , the elastic component 3 may include a valve stem pressure plate 31 and an elastic member 32. The valve stem pressure plate 31 is disposed in the outer housing 1 and is fixed to the outer housing 1 through the elastic member 32. The end of the valve stem pressure plate 31 away from the elastic member 32 is used to connect with the input end of the valve stem 71. In this way, the elastic member 32 can apply a force to the valve stem 71 of the oil motor 7 through the valve stem pressure plate 31, and then apply a force to the high bypass valve. Among them, the elastic member 32 can be a spring.

[0027] In the exemplary embodiments provided in the present disclosure, reference is made to Figure 1 , Figure 4 as well as Figure 5 As shown in , a guide portion 111 may be provided on the inner wall of the shell body 11 along the height direction, and a matching portion 311 may be provided on the outer periphery of the valve stem pressure plate 31. The matching portion 311 is slidably matched with the guide portion 111. Through such a setting, the elastic member 32 can be guided to expand and contract along the height direction of the inner wall of the shell body 11, that is, the elastic member 32 can be guided to expand and contract along a preset straight path to avoid the elastic member 32 from failing due to skew during the expansion and contraction process. Here, in order to further limit the movement trajectory of the elastic member 32 to ensure that the elastic member 32 can always expand and contract along the height direction of the shell body 11, it can be provided that the guide portion 111 and the matching portion 311 each include two, and the two guide portions 111 are symmetrically arranged relative to the center line of the shell body 11, and the two guide portions 111 correspond to the two matching portions 311 one by one. Among them, the length of the guide portion 111 can be adaptively set according to the expansion and contraction distance of the elastic member 32.

[0028] The guide portion 111 and the matching portion 311 may be arranged in any suitable manner, and the present disclosure does not limit this. Figure 1 , Figure 4 as well as Figure 5 As shown in , the guide portion 111 can be constructed as a convex strip arranged on the inner wall of the shell body 11, and the convex strip extends along the height direction of the shell body 11, and the matching portion 311 can be constructed as a groove provided on the outer periphery of the valve stem pressure plate 31, and the groove is slidably provided on the convex strip. In some other embodiments, the guide portion 111 can also be constructed as a slide groove provided on the inner wall of the shell body 11 and extending along the height direction of the shell body 11, and the matching portion 311 can be constructed as a slider provided on the outer periphery of the valve stem pressure plate 31, and the slider is slidably provided in the slide groove.

[0029] In the exemplary embodiments provided in the present disclosure, reference is made to Figure 1 and Figure 4As shown in , the elastic component 3 may further include a sleeve 33, which is fixedly arranged on a side of the valve stem pressure plate 31 away from the elastic member 32 and is used to be sleeved on the input end of the valve stem 71. Through such an arrangement, when the valve stem pressure plate 31 and the valve stem 71 are connected, the positioning and connection between the valve stem pressure plate 31 and the valve stem 71 can be facilitated by the matching relationship between the sleeve 33 and the valve stem 71. In order to improve the structural strength of the sleeve 33, an outer edge may be provided on the open edge of the sleeve 33.

[0030] In the exemplary embodiments provided in the present disclosure, reference is made to Figure 1 and Figure 5 As shown in , the elastic component 3 may also include a positioning block 34, which is fixed at the center of the valve stem pressure plate 31 and is arranged away from the opening 1221. The elastic member 32 is sleeved on the positioning block 34. Through such a setting, the installation and positioning of the elastic member 32 on the valve stem pressure plate 31 can be facilitated when the connection between the elastic member 32 and the valve stem pressure plate 31 is realized, so as to better ensure the elastic performance of the elastic member 32. Among them, in order to adapt to the structural shape of the elastic member 32 (such as a spring), the positioning block 34 can be constructed as a circular convex block, and the outer diameter of the circular convex block is set to be slightly smaller than the inner diameter of the elastic member 32.

[0031] In the exemplary embodiments provided in the present disclosure, reference is made to Figure 1 and Figure 6 As shown in the figure, the loading device for the high-pressure bypass system may also include a chassis 4 and a connecting assembly 5. The chassis 4 is used to be arranged between the outer cover shell 1 and the oil motor 7. The chassis 4 may include a second connecting portion 42, a third connecting portion 43 and a through hole 41 for the valve stem 71 to pass through. The distance adjustment assembly 2 connects the outer cover shell 1 and the chassis 4 through the first connecting portion 1211 and the second connecting portion 42. The connecting assembly 5 is used to connect the chassis 4 and the oil motor 7 through the third connecting portion 43, wherein the through hole 41, the third connecting portion 43 and the second connecting portion 42 are arranged in sequence from the inside to the outside along the radial direction of the chassis 4 itself. Through such an arrangement, a standard size of elastic member 32 can be used to realize the production of the loading device for the high-pressure bypass system, without the need to customize the elastic member 32 of a special size, so it has better versatility and low cost.

[0032] Specifically, under the premise of having the same compression performance, the elastic member 32 of standard size has a larger radial size, while the customized elastic member 32 has a smaller radial size. Therefore, if the elastic member 32 of standard size is directly used to meet the use requirements, the radial size of the outer cover shell 1 needs to be expanded synchronously, while the radial size of the oil motor 7 is constant. This will cause the radial size of the outer cover shell 1 to be greater than or equal to the radial size of the oil motor 7, making it impossible for the two to match and connect. Therefore, it is necessary to increase the chassis 4 and respectively provide a second connecting portion 42 connected to the outer cover shell 1 and a third connecting portion 43 connected to the oil motor 7 on the chassis 4 to meet the connection between the outer cover shell 1 and the oil motor 7.

[0033] The distance adjustment component 2 and the connection component 5 can be constructed in any suitable manner, and the present disclosure does not limit this. Optionally, the distance adjustment component 2 may include an adjustment bolt 21 and an adjustment nut 22, the first connection portion 1211 may be configured as a first through hole, the connection component 5 may include a connection bolt 51 and a connection nut 52, the second connection portion 42 may be configured as a second through hole, the third connection portion 43 may be configured as a third through hole, the adjustment bolt 21 passes through the first through hole and the second through hole and is locked and fixed with the adjustment nut 22, and the connection bolt 51 passes through the third through hole for connection with the oil motor 7 and is locked and fixed by the connection nut 52.

[0034] In the above embodiment, the structural shape of the adjusting bolt 21 and the matching relationship between the number of the adjusting nuts 22 can be flexibly selected according to actual conditions, and the present disclosure does not limit this. In addition, the structural shape of the connecting bolt 51 and the matching relationship between the number of the connecting nuts 52 can also be flexibly selected according to actual conditions, and the present disclosure does not limit this. For example, refer to Figure 1 As shown in , when the adjusting bolt 21 is a single-head bolt, each single-head bolt can be matched with one adjusting nut 22 , and when the connecting bolt 51 is a stud bolt, each stud bolt can be matched with three connecting nuts 52 .

[0035] In the exemplary embodiments provided in the present disclosure, reference is made to Figure 1 As shown in the figure, a hanger 6 may also be provided on the top of the outer cover shell 1, and the hanger 6 may have a hanger hole 61, so that during the early installation or later use, it can be connected to a tool such as a manual hoist through the hanger hole 61 on the hanger 6, so that the loading device for the high-voltage bypass system can be auxiliary supported, thereby ensuring the safety of people and equipment during the installation process and use.

[0036] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0037] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0038] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A loading device for a high-pressure bypass system, the high-pressure bypass system comprising an oil motor, characterized in that: The loading device for the high-voltage bypass system comprises: An outer cover shell, one end of which is open and is used to be arranged above the oil motor, wherein the opening is used to be arranged toward the oil motor; a distance adjustment component, wherein the outer housing is used to be connected to the hydraulic motor through the distance adjustment component; and The elastic component is at least partially compressed and arranged inside the outer shell, one end of which is fixedly connected to the outer shell, and the other end of which is connected to the input end of the valve stem of the oil motor through the opening.

2. The loading device for a high-voltage bypass system according to claim 1, characterized in that: The outer cover shell includes a shell body and an end cover, the shell body is fixed on the end cover and divides the end cover into an outer area and an inner area, the outer area is provided with a first connecting portion, the distance adjustment component is used to connect with the oil motor through the first connecting portion, and the opening is formed on the inner area.

3. The loading device for a high-voltage bypass system according to claim 2, characterized in that: The elastic component includes a valve stem pressure plate and an elastic member. The valve stem pressure plate is arranged in the outer cover shell and is fixed to the outer cover shell through the elastic member. One end of the valve stem pressure plate away from the elastic member is used to connect with the input end of the valve stem.

4. The loading device for a high-voltage bypass system according to claim 3, characterized in that: A guide portion is arranged on the inner wall of the shell body along the height direction, and a matching portion is arranged on the outer periphery of the valve stem pressure plate, and the matching portion is slidably matched with the guide portion.

5. The loading device for a high-voltage bypass system according to claim 4, characterized in that: The guide portion is constructed as a convex strip arranged on the inner wall of the shell body, and the convex strip extends along the height direction of the shell body. The matching portion is constructed as a groove opened on the outer periphery of the valve stem pressure plate, and the groove is slidably arranged on the convex strip.

6. The loading device for a high-voltage bypass system according to claim 3, characterized in that: The elastic component also includes a sleeve, which is fixed on a side of the valve stem pressure plate away from the elastic member and is used to be sleeved on the input end of the valve stem.

7. The loading device for a high-voltage bypass system according to claim 3, characterized in that: The elastic component further comprises a positioning block, which is fixed at the center of the valve stem pressure plate and is arranged away from the opening, and the elastic member is sleeved on the positioning block.

8. The loading device for a high-voltage bypass system according to claim 2, characterized in that: The loading device for the high-pressure bypass system also includes a chassis and a connecting assembly, wherein the chassis is used to be arranged between the outer casing and the oil motor, the chassis includes a second connecting portion, a third connecting portion, and a through hole for the valve stem to pass through, the distance adjustment assembly connects the outer casing and the chassis through the first connecting portion and the second connecting portion, and the connecting assembly is used to connect the chassis and the oil motor through the third connecting portion. The via hole, the third connection portion and the second connection portion are sequentially arranged from inside to outside along the radial direction of the chassis itself.

9. The loading device for a high-voltage bypass system according to claim 8, characterized in that: The distance adjustment assembly includes an adjustment bolt and an adjustment nut, the first connection portion is configured as a first through hole, the connection assembly includes a connection bolt and a connection nut, the second connection portion is configured as a second through hole, and the third connection portion is configured as a third through hole. The adjusting bolt passes through the first through hole and the second through hole and is locked and fixed with the adjusting nut. The connecting bolt passes through the third through hole to be connected to the oil motor and is locked and fixed by the connecting nut.

10. The loading device for a high-voltage bypass system according to any one of claims 1 to 9, characterized in that: A hanger is arranged on the top of the outer cover shell, and the hanger has a hanger hole.

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