A method and tool for adjusting the parallel resistance static contact of a circuit breaker

Abstract

The present application belongs to the technical field of auxiliary installation tools of porcelain column type circuit breaker, and particularly relates to a method and tool for centering adjustment of static contact of parallel resistance of circuit breaker. The tool for centering adjustment of static contact of parallel resistance of circuit breaker comprises a detection disc used for butting against a flange plate of a porcelain sleeve of the circuit breaker, the detection disc is provided with a detection rod used for extending into the porcelain sleeve, the detection rod is provided with a detection plug used for being inserted into a plug-in hole of a static contact of the circuit breaker, and further comprises a wedge-shaped plug used for entering into a gap between the static contact and the porcelain sleeve to keep the static contact and the porcelain sleeve in centering, the detection disc is provided with an operation hole through which an adjusting rod on the wedge-shaped plug passes, and the operation hole is a rotation-stopping guide hole through which the adjusting rod is guided and rotation-stopped.

Description

Technical Field

[0001] This invention belongs to the technical field of auxiliary installation tools for porcelain column circuit breakers, specifically relating to a method and tooling for centering and adjusting the static contacts of the parallel resistors of a circuit breaker. Background Technology

[0002] In ultra-high voltage power systems, when line parameters change abruptly, the oscillation of electromagnetic energy on the power grid can cause significant overvoltages. The common practice is to install closing resistors in the circuit breakers to absorb some of the electrical energy in the power grid and limit the overvoltages.

[0003] Existing circuit breakers with closing resistors, such as the one disclosed in patent document CN104332350B, include a circuit breaker with a contact centering support device. This circuit breaker comprises a porcelain bushing, and stationary and moving contacts are installed in the magnetic bushing by insertion. During installation, the stationary contact is first inserted into the porcelain bushing, and the bottom of the stationary contact is fixed to the support base at the bottom of the porcelain bushing. Then, an air-filling tool is used to inflate the centering support device, which is located between the parallel resistors, through the core rod of the stationary contact. This causes the push rods on the centering support device to extend and press against the inner wall of the porcelain bushing. Then, the moving contact is installed in the porcelain bushing. However, if the alignment of the stationary contact in the porcelain bushing is not good, it will result in poor coaxiality between the moving and stationary contacts. The moving contact needs to be removed from the porcelain bushing to adjust the alignment of the stationary contact. Repeated disassembly and reassembly are cumbersome and inefficient.

[0004] To address the aforementioned issues, prior art patent CN108122699B discloses a method and fixture for centering and adjusting the static contact of a parallel resistor in a porcelain-column circuit breaker. This fixture includes a detection disc mounted above a flange on the circuit breaker's porcelain bushing. A detection rod is positioned through the center of the detection disc, and a detection plug is located at the lower end of the detection rod for insertion into the socket of the circuit breaker's static contact. If the detection plug is inserted into the socket, a gap exists between the detection disc and the method flange. If the centering of the stationary contact is not good, the wedge-shaped plug with an adjusting rod is lowered into the gap between the stationary contact and the porcelain sleeve through the clearance channel on the test plate. The depth of the wedge-shaped plug in the gap between the stationary contact and the porcelain sleeve is adjusted by hammering the adjusting rod, thereby adjusting the centering of the stationary contact. After the test plate and the flange are attached, air is injected into the core rod of the stationary contact through the air holes on the test rod and the test plug using an air inflation tool, so that the top rod on the centering support device is opened. The top rod is then glued to the inner wall of the porcelain sleeve by the glue applied to it beforehand.

[0005] However, the diameter of the clearance channel on the detection plate is too large, there is no guide between the adjusting rod and the detection plate, the outer circumference of the stationary contact is arc-shaped, and the surface of the wedge-shaped plug that contacts the stationary contact is flat. When the adjusting rod is hammered downwards, the wedge-shaped plug may shift, affecting the centering adjustment effect. In addition, because the stationary contact will vibrate during the inflation process, the wedge-shaped plug may also be squeezed out of the gap between the stationary contact and the magnetic sleeve, making it impossible to effectively position the stationary contact. Summary of the Invention

[0006] The purpose of this invention is to provide a method for centering and adjusting the stationary contacts of a circuit breaker parallel resistor, thereby solving the technical problems of poor centering and adjustment effect and inability to effectively position the stationary contacts in existing centering and adjustment fixtures. This invention also provides a centering and adjustment fixture for the stationary contacts of a circuit breaker parallel resistor, thereby solving the technical problems of poor centering and adjustment effect and inability to effectively position the stationary contacts in existing centering and adjustment fixtures.

[0007] To achieve the above objectives, the technical solution of the circuit breaker parallel resistor stationary contact centering adjustment method provided by the present invention is as follows: A circuit breaker parallel resistor stationary contact centering adjustment method includes the step of pressing down a wedge-shaped plug to keep the stationary contact of the circuit breaker and the porcelain bushing aligned. The pressing down of the wedge-shaped plug is achieved by an adjusting rod passing through the detection plate. Relying on the anti-rotation guide hole provided on the detection plate for the adjusting rod to pass through and anti-rotation to engage, the adjusting rod applies force to the wedge-shaped plug under the guidance of the anti-rotation guide hole.

[0008] The beneficial effects are as follows: Compared with the prior art where the wedge-shaped plug cannot be positioned in the circumferential direction, thus failing to effectively adjust the centering of the stationary contact, the method for adjusting the stationary contact of the parallel resistor in the circuit breaker provided by this invention has the following advantages: The adjusting rod on the wedge-shaped plug cooperates with the anti-rotation guide hole on the detection plate to stop the adjusting rod in the circumferential direction, preventing the adjusting rod from rotating. Since the wedge-shaped plug is fixed together with the adjusting rod, it cannot rotate in the circumferential direction either. This can prevent the wedge-shaped plug from shaking when the adjusting rod is hammered downwards, thus effectively adjusting the centering of the stationary contact and effectively positioning the stationary contact.

[0009] As a further improvement, the detection plug at the end of the detection rod on the detection plate is inserted into the insertion hole of the stationary contact to force the stationary contact and the porcelain sleeve to be aligned. Then, the adjusting rod is pressed down to make the wedge-shaped plug enter the gap between the stationary contact and the porcelain sleeve to align the stationary contact.

[0010] The beneficial effect is that after aligning the stationary contact with the porcelain sleeve, the stationary contact is positioned by a wedge-shaped plug, which enables the stationary contact to be aligned during the inflation process.

[0011] As a further improvement, it also includes the step of inflating the centering support device through the air hole in the core rod of the detection rod and the stationary contact by an air inflator, while pressing down the wedge-shaped plug during inflation.

[0012] The beneficial effect is that when the centering support device in the parallel resistor is filled with air, the wedge-shaped plug is pressed down on the stationary contact, which can prevent the wedge-shaped plug from being squeezed out from the gap between the stationary contact and the porcelain sleeve, thus improving the reliability of positioning the stationary contact.

[0013] The technical solution of the circuit breaker parallel resistor stationary contact centering adjustment tool provided by the present invention is as follows: A circuit breaker parallel resistor stationary contact centering adjustment tool includes a detection plate for connecting to the circuit breaker porcelain bushing flange, the detection plate is provided with a detection rod for extending into the porcelain bushing, the end of the detection rod is provided with a detection plug for inserting into the insertion hole of the circuit breaker stationary contact, and also includes a wedge-shaped plug for entering the gap between the stationary contact and the porcelain bushing to keep the stationary contact and the porcelain bushing aligned, the detection plate is provided with an operating hole for the adjustment rod on the wedge-shaped plug to pass through, the operating hole is an anti-rotation guide hole for guiding the adjustment rod through and preventing rotation.

[0014] The beneficial effects are as follows: Compared with the prior art where the wedge-shaped plug cannot be positioned in the circumferential direction, thus failing to effectively adjust the centering of the stationary contact, the adjustment rod provided by this invention, in cooperation with the anti-rotation guide hole on the detection plate, can stop the adjustment rod in the circumferential direction, preventing the adjustment rod from rotating. Since the wedge-shaped plug is fixed together with the adjustment rod, it also cannot rotate in the circumferential direction, thereby preventing the wedge-shaped plug from shaking when the adjustment rod is hammered downwards. This effectively adjusts the centering of the stationary contact and effectively positions the stationary contact.

[0015] As a further improvement, the wedge-shaped plug has a thickness direction and a wedge-shaped change direction, and the adjusting rod has an anti-rotation fitting section and a rotatable fitting section. The rotatable fitting section is used to rotate in the anti-rotation guide hole so that the thickness directions of the two relative wedge-shaped plugs are in the same plane, and the anti-rotation fitting section is used to anti-rotate in the anti-rotation guide hole so that the wedge-shaped change directions of the two relative wedge-shaped plugs are in the same plane.

[0016] The beneficial effect is that the adjusting rod is equipped with an anti-rotation fitting section and a rotatable fitting section, which makes it easier to install the wedge-shaped plug into the porcelain sleeve.

[0017] As a further improvement, the anti-rotation fit section is located above the rotatable fit section.

[0018] The beneficial effects are: the anti-rotation mating section is located on the upper part of the adjusting rod, so the adjusting rod can be installed on the detection plate from bottom to top. When installing the detection plate on the porcelain sleeve, you only need to press down the adjusting rod to insert the wedge-shaped plug into the gap between the stationary contact and the porcelain sleeve, which is easy to operate.

[0019] As a further improvement, the anti-rotation fitting section is a square section, and the anti-rotation guide hole is a square hole.

[0020] The beneficial effects are: the square segment and square hole structure is simple and easy to manufacture.

[0021] As a further improvement, the anti-rotation fitting section is formed by a part on the adjusting rod with a protruding guide block. The extension direction of the guide block is consistent with the axial direction of the adjusting rod. The anti-rotation guide hole has a guide groove extending in the vertical direction on its wall. The guide block and the guide groove are anti-rotation fitted in the circumferential direction of the adjusting rod.

[0022] The beneficial effect is that the guide block on the adjusting rod cooperates with the guide groove in the anti-rotation guide hole to prevent rotation and guide, resulting in a better anti-rotation and guiding effect.

[0023] As a further improvement, a handle is provided at the top of the adjusting rod.

[0024] The beneficial effects are: the handle design makes it easy for operators to rotate the adjusting rod and to easily insert the wedge-shaped plug into the porcelain sleeve.

[0025] As a further improvement, the handle is formed by bending the adjusting rod.

[0026] The beneficial effect is that the handle is formed by bending the adjusting rod, which makes it easier to manufacture.

[0027] As a further improvement, the connection between the adjusting rod and the wedge block divides the wedge block into a narrow section and a wide section, with the handle pointing towards the side where the wide section is located.

[0028] The beneficial effect is that the wedge-shaped plug is divided into a narrow part and a wide part, so that when the hammer adjusting rod is lowered, the narrow part of the wedge-shaped plug faces the stationary contact, which makes it easier for the wedge-shaped plug to enter the gap between the stationary contact and the porcelain sleeve. Attached Figure Description

[0029] Figure 1 A schematic diagram of the assembly of the circuit breaker parallel resistor stationary contact centering adjustment fixture and the circuit breaker provided by the present invention.

[0030] Figure 2 for Figure 1 The detection structure in the middle;

[0031] Figure 3 for Figure 2 A schematic diagram of the detection disk in the middle;

[0032] Figure 4 for Figure 3 Side view;

[0033] Figure 5 This is a schematic diagram of the assembly of the adjusting rod and the wedge-shaped plug.

[0034] Explanation of reference numerals in the attached drawings: 1. Porcelain sleeve; 2. Stationary contact; 3. Centering support device; 4. Support base; 5. Insertion hole; 6. Detection disc; 7. Detection rod; 8. Flange; 9. Detection plug; 10. Adjusting rod; 11. Wedge-shaped plug; 12. Handle; 13. Square hole; 14. Pin mounting hole; 15. Detection rod through hole; 16. Mating surface; 17. Rod body; 18. Square section; 19. Cylindrical section; 20. Narrow section; 21. Wide section; 22. Pin. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the invention; that is, the described embodiments are merely some embodiments of the invention, not all embodiments. The components of the embodiments of the invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0037] It should be noted that, in specific embodiments of the present invention, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply such an actual relationship or order between these entities or operations. Furthermore, terms such as "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, the use of phrases such as "comprising a…" to define an element does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0038] In the description of this invention, unless otherwise explicitly specified and limited, terms such as "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0039] In the description of this invention, unless otherwise explicitly specified and limited, the term "provided with" should be interpreted broadly. For example, the object "provided with" can be a part of the body, or it can be separately arranged from the body and connected to the body. This connection can be a detachable connection or a non-detachable connection. Those skilled in the art can understand the specific meaning of the above terms in this invention through specific circumstances.

[0040] The present invention will be further described in detail below with reference to embodiments.

[0041] Example 1 of the circuit breaker parallel resistor stationary contact centering adjustment fixture provided in this invention:

[0042] like Figure 1 and Figure 2 As shown, the aligning and adjusting fixture for the stationary contact of the parallel resistor in a circuit breaker includes a detection structure, an alignment and adjusting structure, and an anti-reverse structure. The detection structure is installed on the porcelain bushing 1 of the circuit breaker to detect whether the stationary contact 2 in the porcelain bushing 1 is aligned. The alignment and adjusting structure is used to adjust the stationary contact 2 so that the stationary contact 2 is aligned and installed in the porcelain bushing 1 via the support base 4.

[0043] like Figure 1 and Figure 2 As shown, the detection structure includes a detection disk 6 and a detection rod 7. Figure 3 and Figure 4As shown, a detection rod through-hole 15 is provided at the center of the detection plate 6 for the detection rod 7 to pass through and be fixed on the detection plate 6. Multiple square holes 13 are provided around the detection rod through-hole 15 on the detection plate 6, evenly spaced around the circumference of the detection plate 6. These square holes 13 serve as anti-rotation guide holes to cooperate with the adjusting rod 10 of the centering adjustment device (detailed description of the adjusting rod 10 is below). Multiple pin mounting holes 14 are provided on the edge of the detection plate 6, evenly spaced around the circumference of the detection plate 6. These are used to fix the detection plate 6 to the flange 8 by inserting pins 22 after the detection plate 6 is fitted with the flange 8, simulating the moving contact of the circuit breaker being installed on the flange 8 of the porcelain bushing 1. A detection plug 9 is provided at the lower end of the detection rod 7 for insertion into the insertion hole 5 on the stationary contact 2. The gap between the detection plate 6 and the flange 8 on the porcelain bushing 1 when the detection plug 9 is inserted into the insertion hole 5 is used to determine the deflection of the stationary contact 2. The detection rod 7 is equipped with an inflation channel, the upper end of which is connected to an inflation tank. Nitrogen gas from the tank is injected through the inflation channel on the detection rod 7 and the detection plug 9 into the core rod of the stationary contact 2. The nitrogen then enters the centering support device 3 on the stationary contact 2 through a channel on the core rod, causing the push rod in the centering support device 3 to extend and press against the inner wall of the ceramic sleeve 1, thereby fixing the stationary contact 2 within the ceramic sleeve 1. The detection rod 7 and the centering support device 3 described above are existing technologies and will not be elaborated further here.

[0044] The centering adjustment structure includes a wedge-shaped plug 11 and an adjusting rod 10. For example... Figure 5 As shown, the wedge-shaped plug 11 has a plate-like structure, and its width gradually decreases from top to bottom to fit into the gap between the stationary contact 2 and the porcelain sleeve 1. Both sides of the wedge-shaped plug 11 in the width direction have mating surfaces 16, which are used to contact and mate with the inner walls of the stationary contact 2 and the porcelain sleeve 1, respectively, to reduce the friction between the wedge-shaped plug 11 and the stationary contact 2 and the porcelain sleeve 1. A mounting hole is provided on the end face of the wider end of the wedge-shaped plug 11. The mounting hole is located near the central axis of the wedge-shaped plug 11, and the extension line of the central axis divides the wedge-shaped plug 11 into a narrow portion 20 and a wide portion 21. The wall of the mounting hole has internal threads for inserting the adjusting rod 10.

[0045] like Figure 5As shown, the adjusting rod 10 includes a rod body 17 and a handle 12. The rod body 17 extends vertically and has a square section 18 and a cylindrical section 19 from top to bottom. The square section 18 is sized to fit the square hole 13 on the detection disc 6, serving as an anti-rotation guide section to prevent the adjusting rod 10 from rotating when the square section 18 is in the square hole 13. The cylindrical section 19 serves as a rotation-fitting section, with an external thread at its bottom end for threaded connection with the wedge-shaped plug 11. The handle 12 is located at the upper end of the square section 18, and its axial direction lies within the plane containing the width of the wedge-shaped plug 11, perpendicular to the axial direction of the rod body 17. A backlash prevention structure is provided between the adjusting rod 10 and the detection disc 6.

[0046] The circuit breaker parallel resistor stationary contact centering adjustment fixture provided by this invention has two usage methods. Method 1: First, pass the adjusting rod 10 through the anti-rotation guide hole on the detection disc 6 from top to bottom, and connect the wedge-shaped plug 11 to the adjusting rod 10. Then, rotate the handle 12 of the adjusting rod 10 so that the handle 12 of the adjusting rod 10 faces forward. At this time, the thickness directions of the two opposing wedge-shaped plugs 11 are in the same plane. Then, insert the detection rod 7 and the wedge-shaped plug 11 into the porcelain sleeve 1 from top to bottom, so that the detection plug 9 at the lower end of the detection rod 7 is inserted into the insertion port of the stationary contact 2. In hole 5, turn handle 12 so that handle 12 faces right. At this time, the wedge shape change direction of the two relative wedge plugs 11 is in the same plane. Observe the size of the gap between the detection disc 6 and the end flange 8 of the porcelain sleeve 1. Then, hammer each adjusting rod 10 downward through handle 12. After the square section 18 of each adjusting rod 10 enters the square hole 13 on the detection disc 6, continue hammering until the detection disc 6 and the flange 8 are in contact. At this time, it means that the stationary contact 2 has been aligned. Fix the detection disc 6 to the flange 8 with pin 22 and prevent rotation. Nitrogen gas is then injected into the core rod channel of the stationary contact 2 through the inflation channel on the detection rod 7 using an inflation tool. The nitrogen gas enters the centering support device 3 through the channel on the core rod, causing each push rod in the centering support device 3 to extend and press against the inner wall of the ceramic sleeve 1. It should be noted that during inflation, the anti-reverse structure needs to stop the adjusting rod 10 to prevent the wedge-shaped plug 11 from coming out of the gap between the stationary contact 2 and the ceramic sleeve 1, thereby effectively positioning the stationary contact 2 and preventing the stationary contact 2 from tilting during inflation.

[0047] Method 2: First, pass the adjusting rod 10 through the anti-rotation guide hole on the detection disc 6 from top to bottom, and connect the wedge-shaped plug 11 to the adjusting rod 10. Then, rotate the handle 12 of the adjusting rod 10 so that the handle 12 faces forward. Then, insert the detection rod 7 and the wedge-shaped plug 11 into the porcelain sleeve 1 from top to bottom, so that the detection plug 9 at the lower end of the detection rod 7 is inserted into the insertion hole 5 of the stationary contact 2. Then, forcibly fix the detection disc 6 to the flange 8 by using the through pin 22 to center the stationary contact 2. Then, rotate the handle 12 so that the handle 12 faces right. At this time, the wedge shape change direction of the two opposing wedge-shaped plugs 11 is in the same plane. Then, by hammering each adjusting rod 10 downwards with the handle 12, the square segment 18 of each adjusting rod 10 enters the square hole 13 on the detection plate 6. After that, the inflation tool injects nitrogen into the channel of the core rod of the stationary contact 2 through the inflation channel on the detection rod 7. The nitrogen enters the centering support device 3 through the channel on the core rod, causing each push rod in the centering support device 3 to extend and press against the inner wall of the porcelain sleeve 1. It should be noted that during inflation, the anti-reverse structure needs to stop the adjusting rod 10 to prevent the wedge-shaped plug 11 from coming out of the gap between the stationary contact 2 and the porcelain sleeve 1, thereby effectively positioning the stationary contact 2 and preventing the stationary contact 2 from tilting during inflation.

[0048] The circuit breaker parallel resistor stationary contact centering adjustment fixture provided by this invention, compared with the prior art where the wedge-shaped plug 11 cannot be positioned in the circumferential direction, thus failing to effectively adjust the centering of the stationary contact 2, has an adjustment rod 10 that cooperates with the anti-rotation guide hole on the detection plate to stop the adjustment rod 10 in the circumferential direction, preventing the adjustment rod 10 from rotating. Since the wedge-shaped plug 11 is fixed together with the adjustment rod 10, the wedge-shaped plug 11 cannot rotate in the circumferential direction either, thus preventing the wedge-shaped plug 11 from shaking when the adjustment rod 10 is hammered downwards. This effectively adjusts the centering of the stationary contact 2 and effectively positions the stationary contact 2.

[0049] Example 2 of the circuit breaker parallel resistor stationary contact centering adjustment fixture provided in this invention:

[0050] The difference between this embodiment and Embodiment 1 is that in Embodiment 1, the anti-rotation fitting section is a square section 18, which engages with the square hole 13 on the detection disc 6 for anti-rotation guidance. In this embodiment, the rod body 17 of the adjusting rod 10 is cylindrical, and a guide block protrudes from the upper part of the rod body 17. The extension direction of the guide block is consistent with the axial direction of the rod body. The wall of the anti-rotation guide hole is provided with a guide groove extending in the vertical direction. The guide block and the guide groove engage with the adjusting rod 10 in the circumferential direction for anti-rotation. The rod body 17 section with the guide block forms the anti-rotation fitting section.

[0051] Embodiment 3 of the circuit breaker parallel resistor stationary contact centering adjustment fixture provided in this invention:

[0052] The difference between this embodiment and Embodiment 1 is that in Embodiment 1, the axial direction of the handle 12 is parallel to the plane containing the width of the wedge-shaped plug 11. In this embodiment, the axial direction of the handle 12 is perpendicular to the plane containing the width of the wedge-shaped plug 11 and extends backward. When the handle 12 is rotated backward, the adjusting rod 10 can be hammered downward.

[0053] Example 4 of the circuit breaker parallel resistor stationary contact centering adjustment fixture provided in this invention:

[0054] The difference between this embodiment and Embodiment 1 is that in Embodiment 1, the handle 12 is integrally bent from the adjusting rod 10. In this embodiment, the handle 12 and the adjusting rod 10 are connected separately.

[0055] Example 1 of the method for adjusting the stationary contact of the parallel resistor in a circuit breaker provided by the present invention:

[0056] The method for adjusting the stationary contact of the parallel resistor in a circuit breaker includes three steps:

[0057] Step 1: Pass the adjusting rod 10 through the anti-rotation guide hole on the detection disc 6 from top to bottom, and connect the wedge-shaped plug 11 to the adjusting rod 10. Then rotate the handle 12 of the adjusting rod 10 so that the handle 12 of the adjusting rod 10 faces forward. At this time, the thickness directions of the two relative wedge-shaped plugs 11 are in the same plane. Then insert the detection rod 7 and the wedge-shaped plug 11 into the porcelain sleeve 1 from top to bottom, so that the detection plug 9 at the lower end of the detection rod 7 is inserted into the insertion hole 5 of the stationary contact 2. Then rotate the handle 12 so that the handle 12 faces right. At this time, the wedge shape change directions of the two relative wedge-shaped plugs 11 are in the same plane. Observe the size of the gap between the detection disc 6 and the flange 8 at the end of the porcelain sleeve 1.

[0058] Step 2: Hammer down each adjusting rod 10 using handle 12. After the square segment 18 of each adjusting rod 10 enters the square hole 13 on the detection plate 6, continue hammering until the detection plate 6 and the flange 8 are in contact. At this point, it indicates that the stationary contact 2 is aligned.

[0059] Step 3: Fix the test disc 6 to the flange 8 with pin 22 and prevent rotation. Inject nitrogen into the channel of the core rod of the stationary contact 2 through the inflation channel on the test rod 7 using an inflation tool. The nitrogen enters the centering support device 3 through the channel on the core rod, causing the push rods in the centering support device 3 to extend and press against the inner wall of the porcelain sleeve 1. It should be noted that during inflation, the anti-reverse structure needs to stop the adjusting rod 10 to prevent the wedge-shaped plug 11 from falling out of the gap between the stationary contact 2 and the porcelain sleeve 1, thereby effectively positioning the stationary contact 2 and preventing the stationary contact 2 from tilting during inflation.

[0060] The component structure mentioned in this embodiment is the same as that in the component structure of the disconnecting switch embodiment 1 above, and will not be described again here.

[0061] Of course, in other embodiments, the structure of each component can also be selected from the structure of the components in any of the embodiments of the circuit breaker parallel resistor static contact centering adjustment tooling in embodiments 2 to 4, which will not be described again here.

[0062] The circuit breaker parallel resistor stationary contact centering adjustment method provided by the present invention, compared with the prior art where the wedge block 11 cannot be positioned in the circumferential direction, resulting in the inability to effectively adjust the centering of the stationary contact 2, has an adjustment rod 10 on the wedge block 11 that cooperates with the anti-rotation guide hole on the detection disk 6 to stop the adjustment rod 10 in the circumferential direction, preventing the adjustment rod 10 from rotating. Since the wedge block 11 is fixed together with the adjustment rod 10, the wedge block 11 cannot rotate in the circumferential direction either, thus preventing the wedge block 11 from shaking when the adjustment rod 10 is hammered downwards. This effectively adjusts the centering of the stationary contact 2 and effectively positions the stationary contact 2.

[0063] Embodiment 2 of the method for adjusting the static contact of the parallel resistor in a circuit breaker provided by the present invention:

[0064] Step 1: Pass the adjusting rod 10 through the anti-rotation guide hole on the detection plate 6 from top to bottom, and connect the wedge-shaped plug 11 to the adjusting rod 10. Then rotate the handle 12 of the adjusting rod 10 so that the handle 12 of the adjusting rod 10 faces forward. Then insert the detection rod 7 and the wedge-shaped plug 11 into the ceramic sleeve 1 from top to bottom so that the detection plug 9 at the lower end of the detection rod 7 is inserted into the insertion hole 5 of the stationary contact 2.

[0065] Step 2: Forcibly fix the test disc 6 to the flange 8 by inserting pins 22 so that the stationary contact 2 is aligned.

[0066] Step 3: Rotate handle 12 so that handle 12 faces right. At this time, the wedge shape change direction of the two opposing wedge-shaped plugs 11 is in the same plane. Then, hammer each adjusting rod 10 downwards through handle 12 so that the square segment 18 of each adjusting rod 10 enters the square hole 13 on the detection plate 6. After that, the inflation tool injects nitrogen into the channel of the core rod of the stationary contact 2 through the inflation channel on the detection rod 7. The nitrogen enters the centering support device 3 through the channel on the core rod, so that each push rod in the centering support device 3 extends to press against the inner wall of the porcelain sleeve 1. It should be noted that during inflation, the anti-reverse structure needs to stop the adjusting rod 10 to prevent the wedge-shaped plug 11 from coming out of the gap between the stationary contact 2 and the porcelain sleeve 1, thereby effectively positioning the stationary contact 2 and preventing the stationary contact 2 from tilting during inflation.

[0067] The component structure mentioned in this embodiment is the same as that in the component structure of the above-mentioned circuit breaker parallel resistor static contact centering adjustment tooling embodiment 1, and will not be described again here.

[0068] Of course, in other embodiments, the structure of each component can also be selected from the structure of the components in any of the embodiments of the circuit breaker parallel resistor static contact centering adjustment tooling in embodiments 2 to 4, which will not be described again here.

[0069] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. The scope of patent protection of the present invention shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present invention shall also be included within the scope of protection of the present invention.

Claims

1. A method for adjusting the centering of the stationary contact of a circuit breaker parallel resistor, comprising the step of maintaining the centering between the stationary contact (2) of the circuit breaker and the porcelain bushing (1) by pressing down a wedge-shaped plug (11), wherein the pressing down of the wedge-shaped plug (11) is achieved by an adjusting rod (10) passing through a detection disc (6), characterized in that, By relying on the anti-rotation guide hole provided on the detection plate (6) for the adjustment rod (10) to pass through and anti-rotation to engage, the adjustment rod (10) applies force to the wedge-shaped plug (11) under the guidance of the anti-rotation guide hole; the detection plug (9) at the end of the detection rod (7) on the detection plate (6) is inserted into the insertion hole (5) of the stationary contact (2) to force the stationary contact (2) and the porcelain sleeve (1) to be aligned. Then, the adjustment rod (10) is pressed down to make the wedge-shaped plug (11) enter the gap between the stationary contact (2) and the porcelain sleeve (1) so that the stationary contact (2) is aligned.

2. The method for adjusting the static contact of the parallel resistor in a circuit breaker according to claim 1, characterized in that, It also includes the step of inflating the centering support device (3) through the air hole in the core rod of the detection rod (7) and the stationary contact (2) by an air inflator, while pressing down the wedge plug (11) during inflation.

3. A aligning and adjusting fixture for a parallel resistor stationary contact of a circuit breaker, comprising a detection disc (6) for connecting to a flange (8) of a porcelain bushing (1) of the circuit breaker, the detection disc (6) having a detection rod (7) for extending into the porcelain bushing (1), the end of the detection rod (7) having a detection plug (9) for inserting into a insertion hole (5) on a stationary contact (2) of the circuit breaker, and further comprising a wedge-shaped plug (11) for entering the gap between the stationary contact (2) and the porcelain bushing (1) to keep the stationary contact (2) and the porcelain bushing (1) aligned, the detection disc (6) having an operating hole through which an adjusting rod (10) on the wedge-shaped plug (11) passes, characterized in that, The operating hole is a guide hole for the adjusting rod (10) to pass through and for anti-rotation engagement.

4. The aligning and adjusting fixture for the stationary contact of the parallel resistor in a circuit breaker according to claim 3, characterized in that, The wedge-shaped plug (11) has a thickness direction and a wedge-shaped change direction. The adjusting rod (10) has a non-rotational engagement section and a rotatable engagement section. The rotatable engagement section is used to rotate in the non-rotational guide hole so that the thickness directions of the two relative wedge-shaped plugs (11) are in the same plane. The non-rotational engagement section is used to non-rotate in the non-rotational guide hole so that the wedge-shaped change directions of the two relative wedge-shaped plugs (11) are in the same plane.

5. The circuit breaker parallel resistor stationary contact centering adjustment fixture according to claim 4, characterized in that, The anti-rotation mating section is located above the rotatable mating section.

6. The circuit breaker parallel resistor stationary contact centering adjustment fixture according to claim 3, 4, or 5, characterized in that, The anti-rotation mating section is a square section (18), and the anti-rotation guide hole is a square hole (13).

7. The circuit breaker parallel resistor stationary contact centering adjustment fixture according to claim 3, 4, or 5, characterized in that, The top of the adjusting rod (10) is provided with a handle (12).

8. The circuit breaker parallel resistor stationary contact centering adjustment fixture according to claim 7, characterized in that, The handle (12) is formed by bending the adjusting rod (10).

9. The circuit breaker parallel resistor stationary contact centering adjustment fixture according to claim 7, characterized in that, The connection between the adjusting rod (10) and the wedge block (11) divides the wedge block (11) into a narrow part (20) and a wide part (21), and the handle (12) points to the side where the wide part (21) is located.

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