A device capable of continuous adjustment of the misalignment value of the driving line

Abstract

The application discloses a device capable of continuously adjusting the misalignment of a driving line, which comprises a pipe base sealing shell, a threaded flange, a container top cover and a container cylinder body; the middle part of the pipe base sealing shell is threadedly connected with the threaded flange, the lower part of the pipe base sealing shell penetrates through the top of the container top cover and enters the inner cavity of the container top cover, and the threaded flange is fixedly installed on the top of the container top cover; the bottom of the container top cover is fixedly connected with the upper end of the threaded flange of the container cylinder body; the reference component of the driving line is located in the container cylinder body; the pipe base sealing shell and the container top cover both adopt eccentric structures, and the eccentricity of the pipe base sealing shell is the same as the eccentricity of the container top cover. The device can effectively seal under high-temperature and high-pressure conditions, and when the misalignment is adjusted, the eccentric pipe base sealing shell only needs to be rotated, without the need of dismounting connecting bolts, so that the alignment of the driving line can be realized, and the fine adjustment of the misalignment in a large range can also be realized.

Description

Technical Field

[0001] This invention relates to a hot-state testing device for a drive line, and more specifically, to a device capable of continuously adjusting the misalignment median of the drive line. Background Technology

[0002] As the execution unit of the reactor control and nuclear safety protection system, the rationality of the control rod drive line's design directly affects the inherent safety of the nuclear reactor. There are multiple sets of control rod drive lines within the reactor, and the drive mechanism of each set is installed within the corresponding tube seat seal on the pressure vessel head. Due to machining and installation errors, as well as welding deformation, unavoidable deviations occur between the control rod axis and the axis of the drive mechanism tube seat seal, causing the drive line to be in a tilted state. To ensure the normal operation of the drive line in a live reactor, it is necessary to verify the impact of these deviations on the drive line's function and performance in an experimental environment, thereby improving or solidifying the drive line's structural design.

[0003] Traditionally, hot-state tests of drive lines typically select a single misalignment value and conduct tests such as drive line operation and rod dropping under that misalignment condition. A structure using an eccentric threaded flange welded to the drive mechanism's pipe seat and sealing shell was employed. Utilizing the initial slight eccentricity of the lower vessel, several misalignment values ​​could be discontinuously adjusted by rotating the eccentric threaded flange until a position meeting the test requirements was achieved. However, with the further expansion of nuclear reactor applications, the operating environment of the drive line has become more complex. Tests now require fine-tuning of various misalignments to verify the impact of misalignment on the test piece's function. Especially in the same experimental study, switching between aligned and misaligned operating conditions is necessary. In this case, a single structure of an eccentric threaded flange welded to the drive mechanism's pipe seat and sealing shell is no longer suitable. If different eccentric threaded flanges and drive mechanism pipe seat and sealing shells were fabricated for different misalignment conditions, the test costs would increase significantly.

[0004] In view of the above, this application is hereby submitted. Summary of the Invention

[0005] The technical problem this invention aims to solve is that traditional methods of verifying the function and performance of a drive line by selecting a single misalignment midpoint cannot meet the requirements for fine adjustment of multiple misalignments in complex drive line operating environments. The objective is to provide a device capable of continuous adjustment of the drive line misalignment midpoint. This device can achieve continuous adjustment of the misalignment midpoint between the upper and lower shaft centers of the reactor vessel over a wide range, and can be applied to misalignment adjustment in reactor drive line testing.

[0006] This invention is achieved through the following technical solution:

[0007] A device for continuously adjusting the misalignment of a drive line includes a pipe seat sealing shell, a threaded flange, a container top cover, and a container body. The middle part of the pipe seat sealing shell is threadedly connected to the threaded flange, and the lower part of the pipe seat sealing shell passes through the top of the container top cover and enters the inner cavity of the container top cover. The threaded flange is fixedly installed on the top of the container top cover. The bottom of the container top cover is fixedly connected to the upper end threaded flange of the container body. The reference component of the drive line is located inside the container body. Both the pipe seat sealing shell and the container top cover adopt an eccentric structure, and the eccentricity of the pipe seat sealing shell is the same as that of the container top cover.

[0008] Furthermore, a sealing gasket is provided on the top of the container top cover; the sealing gasket is located in the top sealing groove of the container top cover.

[0009] Furthermore, the sealing gasket is an annular metal tube.

[0010] Furthermore, the device also includes a pointer and a dial; the pointer is fixedly mounted on the sealing outer surface of the tube seat sealing shell by a bracket, and the dial is fixedly mounted on the top end face of the container top cover.

[0011] Furthermore, the eccentricity of the axis of the inner cavity of the tube seat sealing shell relative to the axis of the middle and lower part of the tube seat sealing shell is e1, and the eccentricity of the axis of the inner cavity of the container top cover relative to the axis of the lower part of the container top cover is e2; e1=e2=δ.

[0012] Furthermore, the value of δ is set according to actual needs.

[0013] Furthermore, when the eccentric direction of the tube seat sealing shell is opposite to the eccentric direction of the container top cover, the misalignment value is 0; when the eccentric direction of the tube seat sealing shell is the same as the eccentric direction of the container top cover, the misalignment value is 2δ.

[0014] Furthermore, the device also includes a first target, a second target, a third target, and a light source; the first target and the second target are located inside the container cylinder and are located on the same axis; the third target is located on the axis of the inner cavity of the tube seat sealing shell.

[0015] Furthermore, the reference structure of the drive line includes a support plate and a core plate arranged vertically; the first target is disposed at the center point of the core plate, and the second target is disposed at the center point of the support plate.

[0016] Furthermore, the threaded flange is fixedly installed on the top of the container top cover by bolts, and the bottom of the container top cover is fixedly connected to the upper end flange of the container body by bolts.

[0017] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0018] 1. The present invention provides a device for continuous adjustment of the misalignment center value of a drive line. By setting an eccentric tube seat sealing shell, an eccentric top cover and a threaded flange, it can achieve effective sealing under high temperature and high pressure conditions. At the same time, when adjusting the misalignment center value, only the eccentric tube seat sealing shell needs to be rotated, without disassembling the connecting bolts. The operation is simple and the installation cycle is shortened. It is suitable for high-precision requirements where the misalignment center value of the drive line needs to achieve multiple eccentric conditions within a large range.

[0019] 2. The present invention provides a device for continuous adjustment of the misalignment value of the drive line, which can realize arbitrary misalignment adjustment within the range of 0 to 2δ (where δ is the design eccentricity value of the eccentric component). The misalignment value adjustment range is large and can meet various misalignment adjustment needs.

[0020] 3. The present invention provides a device for continuous adjustment of the misalignment value of the drive line. A pointer is fixedly installed on the sealing shell surface of the tube seat sealing shell, and a scale is fixedly installed on the top of the container top cover. Different misalignment positions are marked by the pointer and the scale. The connecting bolts do not need to be disassembled, and the reassembly accuracy is high.

[0021] 4. The present invention provides a device for continuous adjustment of the misalignment value of the drive line. An annular metal tube sealing structure is adopted between the eccentric tube seat sealing shell and the container top cover. During the misalignment adjustment process, the sealing ring can be reused multiple times without disassembly. The sealing effect under high temperature and high pressure is guaranteed, which can save installation time and save costs. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the pipe seat sealing shell structure provided in an embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of a first type of container top cover structure provided in an embodiment of the present invention;

[0025] Figure 3 This is a schematic diagram of a second container top cover structure provided in an embodiment of the present invention;

[0026] Figure 4 This is a schematic diagram of the eccentric adjustment device provided in an embodiment of the present invention;

[0027] Figure 5 This is a schematic diagram of the structure in the drive line misalignment provided in an embodiment of the present invention.

[0028] The attached diagram shows the markings and corresponding component names:

[0029] 1-Pipe seat sealing shell, 2-Threaded flange, 3-Container top cover, 4-Container cylinder, 5-Pointer, 31-Sealing gasket. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of the present invention are only used to explain the present invention and are not intended to limit the present invention.

[0031] Example

[0032] Due to machining and installation errors, as well as welding deformation, an unavoidable deviation occurs between the control rod axis and the axis of the drive mechanism tube seat sealing shell, causing the drive line to be in a tilted state. To ensure the normal operation of the drive line in a real reactor, it is necessary to verify the impact of misalignment on the drive line's function and performance in a test environment, thereby improving or solidifying the drive line's structural design. With the further expansion of nuclear reactor applications, the operating environment of the drive line is becoming more complex, requiring tests to achieve adjustments to multiple misalignments and control the accuracy of the misalignment values. However, previous hot-state tests of the drive line generally selected one misalignment value to conduct drive line operation and rod dropping tests under that misalignment condition. This approach cannot meet the need for fine adjustment of multiple misalignments in complex drive line operating environments.

[0033] To address the shortcomings of traditional methods, this embodiment provides a device for continuous adjustment of the misalignment value of the drive line. By incorporating an eccentric tube seat sealing shell, an eccentric top cover, and a threaded flange, effective sealing can be achieved under high temperature and high pressure conditions. Furthermore, during misalignment adjustment, only the eccentric tube seat sealing shell needs to be rotated; the connecting bolts do not need to be removed. This device is suitable for experimental research where the drive line misalignment value requires adjustment under various operating conditions or has a small misalignment value requirement. Moreover, this device has advantages such as a large adjustment range, high installation accuracy, simple operation, reliable sealing, and savings in installation time and cost. It can achieve arbitrary misalignment adjustment within the range of 0 to 2δ (where δ is the design eccentricity value of the eccentric component), providing a large misalignment adjustment range to meet various misalignment adjustment needs.

[0034] Specifically, a device capable of continuously adjusting the midpoint of the drive line misalignment, such as... Figure 5As shown, the system includes a pipe seat sealing shell 1, a threaded flange 2, a container top cover 3, and a container body 4. The middle part of the pipe seat sealing shell 1 is threadedly connected to the threaded flange 2. The lower part of the pipe seat sealing shell 1 passes through the top of the container top cover 3 and enters the inner cavity of the container top cover 3. The threaded flange 2 is fixedly installed on the top of the container top cover 3 by bolts. The bottom of the container top cover 3 is fixedly connected to the upper end flange 2 of the container body 4 by bolts. The reference component of the drive line is located inside the container body 4. Both the pipe seat sealing shell 1 and the container top cover 3 adopt an eccentric structure, and the eccentricity of the pipe seat sealing shell 1 is the same as that of the container top cover 3.

[0035] in,

[0036] A sealing gasket 31 is provided on the top of the container top cover 3; the sealing gasket 31 is located in the top sealing groove of the container top cover 3, and the sealing gasket 31 is an annular metal tube. The eccentricity of the axis of the inner cavity of the tube seat sealing shell 1 relative to the middle and lower axis of the tube seat sealing shell 1 is e1, and the eccentricity of the axis of the inner cavity of the container top cover 3 relative to the lower axis of the container top cover 3 is e2; e1=e2=δ, ​​and the size of δ is set according to actual needs. When the eccentricity direction of the tube seat sealing shell 1 is opposite to the eccentricity direction of the container top cover 3, the misalignment value is 0; when the eccentricity direction of the tube seat sealing shell 1 is the same as the eccentricity direction of the container top cover 3, the misalignment value is 2δ.

[0037] The following, in conjunction with the appendix Figure 1 To be continued Figure 4 The structure of the pipe seat sealing shell 1, the structure of the container top cover 3, and the structure of the eccentric adjustment device composed of the pipe seat sealing shell 1 and the container top cover 3 are further explained.

[0038] like Figure 1 As shown, in the structure of the pipe seat sealing shell 1, the eccentricity between the outer circular surface axis of each cylinder to the right of "end face e" and the inner cavity axis of the pipe seat sealing shell 1 is δ (determined according to requirements). The internal structure of the pipe seat sealing shell 1 meets the installation requirements of the drive mechanism. The middle outer circle is designed with a threaded structure to mate with the threaded flange 2 of the pipe seat sealing shell. The pipe seat sealing shell 1 can rotate around the sealing surface stop, and the axial pre-tightening between it and the container top cover 3 is achieved through the connecting bolts between the threaded flange 2 and the container top cover 3.

[0039] like Figure 2 As shown, the container top cover 3 mainly performs two functions: first, to ensure the sealing of the container's upper end cap; and second, to provide an adjustment reference for the eccentric tube seat sealing shell 1. The inner cavity of the container top cover 3 (including the upper sealing surface) and the center circle of the upper bolt are designed as an eccentric structure relative to the lower sealing surface, the outer circle of the lower end of the top cover, and the center circle of the bolt. The eccentricity is the same as that of the eccentric tube seat sealing shell 1, which is δ.

[0040] This embodiment also provides, as follows: Figure 3The container top cover 3 of the second structure shown is the same as the container top cover 3 of the first structure in principle and in combination with the threaded flange 2 and the threaded flange 2 at the upper end of the container body 4. Both are fixedly connected to the threaded flange 2 and the threaded flange 2 at the upper end of the container body 4 by bolts. The difference lies in the internal cavity structure of the container top cover 3.

[0041] like Figure 4 As shown, when the eccentricity of the pipe seat sealing shell 1 is opposite to that of the top cover, the theoretical misalignment value is 0 (relative to the outer circle of the sealing surface at the lower end of the top cover); when the eccentricity of the pipe seat sealing shell 1 is the same as that of the top cover, the theoretical misalignment value is 2δ (relative to the outer circle of the sealing surface at the lower end of the top cover). The theoretical misalignment values ​​at other positions are in the range of 0 to 2δ. By rotating the eccentric pipe seat sealing shell 1, the threaded flange 2 is fixed to the container top cover 3 by bolts. The eccentric pipe seat sealing shell 1 will rotate continuously along the sealing stop at the upper end of the top cover, and different misalignment values ​​will be obtained at different positions.

[0042] Furthermore, Figure 5 The drive line misalignment structure shown also includes a first target, a second target, a third target, and a light source. The first and second targets are located inside the container shell 4, and are on the same axis; the third target is located on the axis of the inner cavity of the tube seat sealing shell 1. Furthermore, the reference structure for the drive line includes a support plate and a core upper plate arranged vertically; the first target is located at the center point of the core upper plate, and the second target is located at the center point of the support plate.

[0043] The following is combined Figure 4 To further explain: In practical applications, the internal components of the drive line are installed inside the container. The misalignment of the drive line is relative to the center reference of the internal components inside the container. This reference may have a slight eccentricity with the center of the container sealing surface stop. The accurate position of the specific misalignment value Δ can be obtained by adjusting the eccentric tube seat sealing shell 1 according to the center reference of the internal components.

[0044] In addition, the device includes a pointer 5 and a dial; the pointer 5 is fixedly mounted on the sealing outer surface of the tube seat sealing shell by a bracket, and the dial is fixedly mounted on the top of the container top cover. Different misalignment positions are marked by the pointer 5 and the dial, allowing the connecting bolts to be installed without disassembling, resulting in high reassembly accuracy.

[0045] In summary, this embodiment provides a device for continuous adjustment of the misalignment value of a drive line. It comprises an eccentrically oriented container top cover, an eccentrically oriented pipe seat sealing shell, a threaded flange, bolts, a gasket, and marking accessories fixed to the outer surface of the pipe seat sealing shell. This device, by setting the eccentric pipe seat sealing shell, eccentric top cover, and threaded flange, achieves effective sealing under high temperature and high pressure conditions. Furthermore, during misalignment adjustment, only the eccentric pipe seat sealing shell needs to be rotated; there is no need to disassemble the connecting bolts. This allows for both drive line alignment and fine adjustment of misalignment over a wide range. Specifically, this device can achieve arbitrary misalignment adjustment within the range of 0 to 2δ, providing a large range of misalignment adjustment to meet various misalignment adjustment needs. In addition, this device can mark different misalignment positions through accessories such as pointers fixed to the outer surface of the pipe seat sealing shell and scales fixed to the top cover of the container. The connecting bolts do not need to be disassembled, and the reassembly accuracy is high. The eccentric pipe seat sealing shell and the top cover of the container adopt an annular metal sealing structure. During the misalignment adjustment process, the sealing ring does not need to be disassembled and can be reused multiple times. The sealing effect under high temperature and high pressure is guaranteed, which can save installation time and save costs.

[0046] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A device capable of continuously adjusting the midpoint of drive line misalignment, characterized in that, The container includes a pipe seat sealing shell (1), a threaded flange (2), a container top cover (3), and a container body (4). The middle part of the pipe seat sealing shell (1) is threadedly connected to the threaded flange (2), and the lower part of the pipe seat sealing shell (1) passes through the top of the container top cover (3) and enters the inner cavity of the container top cover (3). The threaded flange (2) is fixedly installed on the top of the container top cover (3). The bottom of the container top cover (3) is fixedly connected to the upper end threaded flange of the container body (4). The reference component of the drive line is located inside the container body (4). Both the pipe seat sealing shell (1) and the container top cover (3) adopt an eccentric structure, and the eccentricity of the pipe seat sealing shell (1) is the same as that of the container top cover (3). The top of the container top cover (3) is provided with a sealing gasket (31), which is an annular metal tube; The pipe seat sealing shell (1) rotates along the upper sealing stop of the container top cover (3), and the axial pre-tightening between it and the container top cover (3) is achieved by the connecting bolts of the threaded flange (2) and the container top cover (3).

2. The device for continuously adjusting the midpoint of drive line misalignment according to claim 1, characterized in that, The sealing gasket (31) is located in the top sealing groove of the container top cover (3).

3. The device for continuously adjusting the midpoint of drive line misalignment according to claim 1, characterized in that, It also includes a pointer (5) and a dial; the pointer (5) is fixedly mounted on the sealing shell surface of the tube seat sealing shell (1) by a bracket, and the dial is fixedly mounted on the top end face of the container top cover (3).

4. The device for continuously adjusting the midpoint of drive line misalignment according to claim 1, characterized in that, The eccentricity of the inner cavity of the tube seat sealing shell (1) relative to the center line of the outer diameter of the middle and lower part of the tube seat sealing shell (1) is e1, and the eccentricity of the inner cavity of the container top cover (3) relative to the lower part of the axis of the container top cover (3) is e2; e1=e2=δ.

5. The device for continuously adjusting the midpoint of drive line misalignment according to claim 4, characterized in that, The value of δ is set according to actual needs.

6. A device for continuously adjusting the midpoint of drive line misalignment according to claim 4 or 5, characterized in that, When the eccentric direction of the tube seat sealing shell (1) is opposite to that of the container top cover (3), the misalignment value is 0; when the eccentric direction of the tube seat sealing shell (1) is the same as that of the container top cover (3), the misalignment value is 2δ.

7. The device for continuously adjusting the midpoint of drive line misalignment according to claim 1, characterized in that, It also includes a first target, a second target, a third target and a light source; the first target and the second target are located inside the container body (4) and are located on the same axis; the third target is located on the axis of the inner cavity of the tube seat sealing shell (1).

8. The device for continuously adjusting the midpoint of drive line misalignment according to claim 7, characterized in that, The reference structure of the drive line includes a support plate and a core plate arranged vertically; the first target is set at the center point of the core plate, and the second target is set at the center point of the support plate.

9. The device for continuously adjusting the midpoint of drive line misalignment according to claim 1, characterized in that, The threaded flange (2) is fixedly installed on the top of the container top cover (3) by bolts, and the bottom of the container top cover (3) is fixedly connected to the upper end flange of the container body (4) by bolts.

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