Insulation tube, voltage sensor, energy extraction device and pole-mounted circuit breaker

Abstract

The embodiments of the present application provide an insulating cylinder, a voltage sensor, an energy extraction device, and a pole-mounted circuit breaker, wherein the insulating cylinder includes a cylinder body and an electrode column, an end wall of the cylinder body in the axial direction is formed with a through hole, the first axial end of the electrode column is arranged inside the cylinder body, and the second end extends to the outside of the cylinder body through the through hole, wherein the electrode column forms a limiting portion, and the limiting portion cooperates with the cylinder body to limit the relative rotation between the electrode column and the cylinder body. In the insulating cylinder, voltage sensor, energy extraction device, and pole-mounted circuit breaker of the embodiments of the present application, a limiting portion that cooperates with the cylinder body to stop rotation is formed on the electrode column, thereby reducing the possibility of relative rotation between the electrode column and the cylinder body, and further reducing the possibility of desoldering problems between the electrode column and the electrical components inside the cylinder body.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of power equipment, and in particular to an insulating cylinder, a voltage sensor, an energy extraction device and a pole-mounted circuit breaker. Background Art

[0002] The electrical components are often placed in an insulating cylinder and connected to an external circuit through the electrodes of the insulating cylinder. The electrical components and the electrodes are often connected by welding. In the insulating cylinder provided by the related art, there is a risk of desoldering at the connection between the electrodes and the electrical components in the insulating cylinder. Summary of the invention

[0003] In view of this, the embodiments of the present application hope to provide an insulating cylinder, a voltage sensor, an energy extraction device and a pole-mounted circuit breaker that can solve or at least partially solve the above-mentioned problems.

[0004] A first aspect of an embodiment of the present application provides an insulating cylinder, comprising: a cylinder body, an end wall of the cylinder body in the axial direction of which is formed with a through hole; an electrode column, a first axial end of the electrode column is arranged inside the cylinder body, and a second end extends to the outside of the cylinder body through the through hole, wherein a limiting portion is formed on the electrode column, and the limiting portion cooperates with the cylinder body to stop rotation so as to limit the relative rotation between the electrode column and the cylinder body.

[0005] In some embodiments, the limiting portion is formed as a polygonal columnar structure, and the inner surface of the through hole is formed with a plurality of limiting surfaces corresponding to the plurality of side surfaces on the circumference of the limiting portion, and the plurality of side surfaces on the circumference of the limiting portion are respectively fitted with the plurality of limiting surfaces, thereby achieving anti-rotation cooperation between the limiting portion and the cylinder.

[0006] In some embodiments, the end wall portion is raised to form a boss, and the through hole passes through the boss.

[0007] In some embodiments, the limiting portion has a first step surface facing the second end, the inner surface of the through hole is partially raised to form a first stop surface facing the first end, and the first step surface abuts against the first stop surface.

[0008] In some embodiments, the electrode column is formed with a stop portion, and the stop portion is arranged on the side of the limiting portion close to the first end, and the stop portion has a second step surface facing the second end, and the inner surface portion of the through hole is raised to form a second stop surface facing the first end, and the second step surface abuts against the second stop surface, or the second step surface abuts against the inner surface of the end wall.

[0009] In some embodiments, the electrode column is formed with a positioning portion, the positioning portion is disposed on a side of the limiting portion close to the second end, and at least a portion of the positioning portion is located outside the cylinder.

[0010] In some embodiments, the positioning portion has a third step surface facing the second end, and the third step surface is located outside the cylinder.

[0011] In some embodiments, the insulating tube includes a sealing ring, which is sleeved on the electrode column and fits with the inner surface of the through hole.

[0012] In some embodiments, the electrode column is formed with a mounting groove, the mounting groove extends along the circumference of the electrode column to form a closed ring structure, and at least a portion of the sealing ring is located in the mounting groove.

[0013] In some embodiments, the inner surface portion of the through hole is raised to form a sealing portion, the sealing portion extends along the circumference of the through hole to form a closed annular structure, and the sealing ring is interference fit with the sealing portion.

[0014] In some embodiments, the electrode column is formed with a connecting portion, which is located outside the cylinder and has a threaded structure on its outer surface.

[0015] In some embodiments, the insulating cylinder includes a conductive bolt, and a threaded hole is formed on an end surface of the first end, and the conductive bolt is screwed into the threaded hole.

[0016] A second aspect of an embodiment of the present application provides a voltage sensor, which includes: an insulating cylinder as described in any of the above embodiments; and an electrical component disposed in the cylinder, wherein the electrical component includes a pressure measuring piece, and the pressure measuring piece is conductively connected to the electrode column.

[0017] A third aspect of an embodiment of the present application provides an energy extraction device, comprising: an insulating cylinder as described in any of the above embodiments; an electrical component disposed in the cylinder, the electrical component comprising an energy extraction component, and the energy extraction component is conductively connected to the electrode column.

[0018] A fourth aspect of the embodiments of the present application provides a pole-mounted circuit breaker, which includes the voltage sensor described in the second aspect of the embodiments of the present application and / or the energy extraction device described in the third aspect of the embodiments of the present application.

[0019] In the insulating cylinder, voltage sensor, energy extraction device and pole-mounted circuit breaker of the embodiments of the present application, a limit portion is formed on the electrode column and cooperates with the cylinder body to stop rotation, thereby reducing the possibility of relative rotation between the electrode column and the cylinder body, and further reducing the possibility of desoldering problems between the electrode column and the electrical components inside the cylinder body. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of an insulating cylinder according to an embodiment of the present application;

[0021] Figure 2 for Figure 1 Explosion diagram of the middle insulating cylinder;

[0022] Figure 3 for Figure 1 A schematic diagram of the axial section of the middle insulating cylinder;

[0023] Figure 4 A schematic diagram of an electrode column according to an embodiment of the present application;

[0024] Figure 5 This is a schematic diagram of an axial cross section of a cylinder according to an embodiment of the present application;

[0025] Figure 6 for Figure 1 AA cross-section diagram of the middle insulating cylinder.

[0026] Description of Reference Numerals

[0027] 1. Cylinder; 11. End wall; 111. Boss; 12. Through hole; 12a. Limiting surface; 12b. First stop surface; 12c. Second stop surface; 12d. Sealing portion; 2. Electrode column; 2a. First end; 2b. Second end; 21. Limiting portion; 21a. First step surface; 22. Stopping portion; 22a. Second step surface; 23. Positioning portion; 23a. Third step surface; 24. Mounting groove; 3. Sealing ring; 4. Conductive bolt. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0029] The various specific technical features described in the specific embodiments can be combined in any suitable manner without contradiction, for example, different embodiments and technical solutions can be formed by combining different specific technical features. In order to avoid unnecessary repetition, various possible combinations of the specific technical features in the present invention will not be described separately.

[0030] In the following description, the terms "first\second\..." are only used to distinguish different objects, and do not mean that the objects have the same or related points. It should be understood that the directions "above", "below", "outside" and "inside" are all directions in normal use, and the directions "left" and "right" refer to the left and right directions shown in the specific corresponding schematic diagrams, which may be the left and right directions in normal use or not.

[0031] It should be noted that the terms "comprises", "includes" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element. "Multiple" means greater than or equal to two.

[0032] An embodiment of the present application provides an insulating cylinder, which can be applied to a voltage sensor or other electrical equipment with insulation requirements, without limitation.

[0033] Reference Figure 1-Figure 6 The insulating cylinder of the embodiment of the present application includes a cylinder body 1 and an electrode column 2.

[0034] Reference Figure 1-Figure 3 A through hole 12 is formed on an axial end wall 11 of the cylinder 1 , and the first end 2 a of the electrode column 2 can be located inside the cylinder 1 , and the second end 2 b can extend to the outside of the cylinder 1 through the through hole 12 .

[0035] As an example, the cylinder 1 may be made of insulating material, such as rubber material or injection molding material, and it only needs to meet the insulation requirements during actual use.

[0036] One axial end of the cylinder 1 has an end wall 11, and a through hole 12 is formed on the end wall 11. The extension direction of the through hole 12 can be parallel to the axial direction of the cylinder 1 or have a certain angle. Technical personnel in this field can make a specific determination based on the actual installation requirements of the electrical equipment where the insulating cylinder is located, and there is no limitation on this.

[0037] The other axial end of the cylinder 1 can be closed or open. In the embodiment where the other axial end of the cylinder 1 is closed, in the actual preparation process, the other axial end of the cylinder 1 can be opened first, and then the electrode column 2 and other internal structures that need to be installed in the cylinder 1 (such as electrical components) can be installed through the opening, and then the opening can be closed after the installation is completed.

[0038] The electrode column 2 may be a substantially columnar structure made of a conductive material.

[0039] The electrode column 2 is used to connect the electrical components disposed inside the cylinder 1 to the circuit structure outside the cylinder 1. The electrical components here may include but are not limited to pressure measuring components for measuring voltage, energy taking components for obtaining and / or storing electrical energy, etc., and those skilled in the art may make specific arrangements according to actual use requirements.

[0040] Taking the electrical component including a pressure measuring piece as an example (that is, the insulating cylinder is applied to a voltage sensor), the pressure measuring piece includes a high-voltage capacitor and a low-voltage capacitor. The first end 2a of the electrode column 2 is used to connect to the high-voltage capacitor arranged inside the cylinder 1, and the second end 2b can be used to connect to an external high-voltage circuit.

[0041] In the insulating cylinder provided by the related technology, relative movement is likely to occur between the electrode column and the cylinder body. In addition, construction workers may have problems with improper operation during the actual assembly process, such as using excessive force, which may lead to desoldering problems between the electrode column and the electrical components inside the cylinder body.

[0042] For the above problems, refer to Figure 3 and Figure 4 The electrode column 2 of the embodiment of the present application forms a limiting portion 21, and the limiting portion 21 cooperates with the cylinder 1 to prevent rotation, thereby limiting the relative rotation between the limiting portion 21 and the cylinder 1. In this way, the possibility of desoldering problems between the electrode column 2 and the electrical components inside the cylinder 1 can be reduced.

[0043] In some embodiments, reference Figure 4 The limiting portion 21 can be formed into a polygonal columnar structure, where the polygonal columnar structure refers to a columnar structure having at least three parallel and equal side edges, such as a triangular prism, a quadrangular prism, a pentagonal prism, a hexagonal prism, etc., and the specific number of side edges is not limited.

[0044] Reference Figure 5 The inner surface of the through hole 12 is formed with a plurality of limiting surfaces 12a corresponding one to one to the plurality of side surfaces of the limiting portion 21 in the circumferential direction. Taking the limiting portion 21 as a hexagonal column structure as an example, the inner surface of the through hole 12 can be formed with six limiting surfaces 12a.

[0045] Reference Figure 6 The multiple side surfaces of the limiting portion 21 in the circumferential direction are respectively fitted with the multiple limiting surfaces 12 a , thereby achieving the anti-rotation fit between the limiting portion 21 and the cylinder body 1 .

[0046] The above-mentioned anti-rotation matching method can better limit the relative rotation between the cylinder 1 and the electrode column 2 on the one hand, and is easy to manufacture and assemble on the other hand.

[0047] In this embodiment, the limiting portion 21 and the through hole 12 may be interference fit to increase the tightness of the side surface of the limiting portion 21 in the circumferential direction and the limiting surface 12a, thereby obtaining a better anti-rotation effect. Of course, the limiting portion 21 and the through hole 12 may also be exactly fitted, or even have a certain gap, as long as the expected anti-rotation effect can be achieved.

[0048] It should be noted that the anti-rotation cooperation mode between the barrel 1 and the limiting portion 21 is not limited thereto, for example, the limiting portion 21 may also be one or more blocks formed by the surface protrusions of the electrode column 2, and taking multiple blocks as an example, the multiple blocks may be distributed along the circumference of the electrode column 2. One or more slots may be formed on the end wall 11, and the blocks may be inserted into the slots, thereby realizing the anti-rotation cooperation between the barrel 1 and the limiting portion 21.

[0049] In some embodiments, the end wall 11 is partially raised to form a boss 111, and the through hole 12 passes through the boss 111. In this way, the axial length of the through hole 12 can be increased without increasing the overall length of the barrel 1, so that the limiting portion 21 and the inner surface of the through hole 12 have a larger contact area, further reducing the possibility of relative rotation between the electrode column 2 and the barrel 1.

[0050] In this embodiment, the specific shape, protrusion direction, and protrusion height of the boss 111 are not limited, and those skilled in the art can make specific settings according to actual usage requirements.

[0051] In some other embodiments, the axial length of the through hole 12 may also be increased by increasing the thickness of the end wall 11 .

[0052] In some embodiments, reference Figure 4 The limiting portion 21 has a first step surface 21a facing the second end 2b, and the inner surface of the through hole 12 is partially raised to form a first stop surface 12b facing the first end 2a. The first step surface 21a abuts against the first stop surface 12b to limit the movement of the electrode column 2 along its axial direction. The first step surface 21a facing the second end 2b here means that the normal vector of the first step surface 21a points to the direction where the second end 2b is located. The description of a certain surface facing a certain end in the relevant parts below also adopts this explanation method.

[0053] In this way, after the actual assembly is completed, the movement of the electrode column 2 along its axial direction toward the outside of the cylinder 1 will be restricted, thereby further reducing the possibility of desoldering of the electrode column 2 and the electrical components inside the cylinder 1.

[0054] As an example, taking the limiting portion 21 as a polygonal column structure, the diameter of the polygonal column structure can be larger than the diameter of the portion between the second end 2b of the electrode column 2 and the limiting portion 21, thereby forming a first step surface 21a on the side of the polygonal column structure facing the second end 2b.

[0055] The specific form of the first stop surface 12b is not limited. Taking the limiting portion 21 as a multi-prism structure as an example, the first step surface 21a will be formed into a closed ring structure extending along the circumference of the electrode column 2, and the first stop surface 12b can also extend along the circumference of the through hole 12 to form a ring-shaped closed structure, so that the first step surface 21a and the first stop surface 12b obtain a larger contact area, thereby obtaining a better stopping effect. Of course, the first stop surface 12b may not form a ring-shaped closed structure, for example, it may form a semi-ring-shaped open structure.

[0056] It should be noted that the limiting portion 21 may not form the first step surface 21a, for example, the diameter of the limiting portion 21 may not exceed the diameter of other parts of the electrode column 2. Alternatively, on the basis of the limiting portion 21 forming the first step surface 21a, the inner surface of the through hole 12 may not form the first stop surface 12b.

[0057] In some embodiments, reference Figure 4 The electrode column 2 is formed with a stopper 22, which is arranged on the side of the limiting portion 21 close to the first end 2a, and has a second step surface 22a facing the second end 2b. The inner surface of the through hole 12 is partially raised to form a second stopper surface 12c facing the first end 2a, and the second step surface 22a abuts against the second stopper surface 12c. Alternatively, the second step surface 22a can directly abut against the inner surface of the end wall 11. In this way, the movement of the electrode column 2 along its axial direction is limited.

[0058] As an example, the stopper 22 may be a roughly columnar structure, such as a cylindrical structure. Its diameter may be larger than the diameter of the other parts of the electrode column 2 between the second end 2b and the second end 2b, thereby forming a second step surface 22a. Alternatively, the stopper 22 may also be a block structure protruding in a direction perpendicular to the axial direction of the electrode column 2, etc., which is not limited thereto.

[0059] The second step surface 22a can abut against the second stop surface 12c, so that the movement of the electrode column 2 along its axial direction can be limited, and the space inside the cylinder 1 will not be occupied, making the overall layout more compact. Alternatively, the second step surface 22a can directly abut against the inner surface of the end wall 11, so that the difficulty of forming the through hole 12 can be reduced.

[0060] It should be noted that the first step surface 21a and the second step surface 22a may be provided at the same time, or only the first step surface 21a may be provided, or only the second step surface 22a may be provided, or neither may be provided, and technicians in this field may make their own choices according to actual usage requirements.

[0061] In some embodiments, reference Figure 4 The electrode column 2 is formed with a positioning portion 23, and the positioning portion 23 is arranged on a side of the limiting portion 21 close to the second end 2b. Figure 1 and Figure 3 , at least a part of the positioning portion 23 is located outside the barrel 1. In this way, during the actual assembly process, the operator can judge whether the electrode column 2 is installed in place by observing the position of the positioning portion 23. On the other hand, this arrangement can also further reduce the risk of desoldering of the electrode column 2 and the electrical components inside the barrel 1 due to careless operation during the actual construction process. Specifically, if the positioning portion located outside the barrel 1 is not provided, the operator will use the end wall 11 of the barrel 1 as a reference for construction during the actual operation. Taking the electrode column 2 being screwed into the external threaded hole as an example, the operator will usually place the construction piece in a position in contact with the end wall 11 and twist it until it can no longer be twisted. The barrel 1 itself has a certain elasticity. Therefore, during the actual construction process, the deformation of the end wall 11 may be caused when twisting, resulting in the ability to continue twisting even when it is screwed in place, thereby increasing the risk of desoldering of the electrode column 2 and the electrical components. In this embodiment, during the actual construction process, the positioning portion 23 can be used as a reference. Since the position of the positioning portion 23 itself is fixed and the electrode column 2 is a rigid structure, the positioning portion 23 can more accurately help the operator accurately judge the current installation status, reduce the probability of the above situation occurring, and thereby reduce the risk of desoldering of the electrode column 2 and the electrical components.

[0062] The positioning portion 23 may be a physical structure protruding from the outer surface of the electrode column 2, or the positioning portion 23 may not have a physical structure, but may be a graphic structure that can be distinguished by the operator with the naked eye, such as a scale, arrow, etc., which only needs to be recognizable by the operator during actual operation.

[0063] In some embodiments, the positioning portion 23 has a third step surface 23a facing the second end 2b, and the third step surface 23a is located outside the barrel 1. In this way, during the actual assembly process, the operator can use the third step surface 23a as a reference to perform construction, which is convenient for installation and judgment of whether it is installed in place, and can reduce the risk of desoldering of the electrode column 2 and the electrical component.

[0064] As an example, the positioning portion 23 may be a columnar structure, such as a cylindrical structure, and its diameter may be larger than the diameter of other parts of the electrode column 2 between the second end 2b and the second end 2b, so as to form a third step surface 23a. After being actually assembled in place, such as after the first step surface 21a abuts against the first stop surface 12b, the minimum distance between the third step surface 23a and the end wall 11 (such as the distance between the third step surface 23a and the end surface of the boss 111) may be not less than 0.5mm, such as 1mm, so that the operator can feel it, so that it is easy for the operator to make a judgment.

[0065] In some embodiments, reference Figure 2 The insulating cylinder includes a sealing ring 3, which is sleeved on the electrode column 2 and fits the inner surface of the through hole 12. In this way, the matching connection between the electrode column 2 and the through hole 12 can be sealed.

[0066] It is understandable that in actual use, the inside of the barrel 1 is usually filled with glue to fix the electrode column 2 and / or the electrical components disposed inside the barrel 1. If the colloid overflows onto the electrode column 2 through the through hole 12, it may affect the conductivity of the electrode column 2 and requires additional cleaning before use. The provision of the sealing ring 3 helps to reduce the overflow of the colloid through the through hole 12, especially to reduce the probability of the colloid overflowing onto the electrode column 2, thereby reducing the probability of the above-mentioned problem. In addition, the provision of the sealing ring 3 can also reduce the entry of impurities such as rainwater and dust from the outside of the barrel 1 into the inside of the barrel 1, thereby increasing the service life of the electrical components disposed inside the barrel 1.

[0067] The specific structure of the sealing ring 3 is not limited. As an example, the sealing ring 3 can be made of flexible materials such as rubber material, silicone material, etc. The sealing ring 3 can have an interference fit with the electrode column 2. At the same time, the sealing ring 3 can have an interference fit with the inner surface of the through hole 12, thereby improving the sealing effect.

[0068] It should be noted that in some other embodiments, other structures besides the sealing ring 3 may be used for sealing, for example, a sealing colloid may be filled in the through hole 12 for sealing.

[0069] In some embodiments, reference Figure 4 The electrode column 2 may be formed with a mounting groove 24, which may extend along the circumference of the electrode column 2 to form a closed ring structure, and at least a portion of the sealing ring 3 is located in the mounting groove 24. In this way, the displacement of the sealing ring 3 during actual use can be reduced, and the sealing effect can be improved.

[0070] The specific position where the mounting groove 24 is formed is not limited, as long as the sealing ring 3 can effectively perform a sealing effect when it is set therein. As an example, the mounting groove 24 can be formed at the limiting portion 21, the positioning portion 23, between the limiting portion 21 and the positioning portion 23, etc. The size of the mounting groove 24 should be compatible with the size of the sealing ring 3 so as to effectively limit it.

[0071] In some embodiments, reference Figure 3 and Figure 5 The inner surface of the through hole 12 is partially raised to form a sealing portion 12d, and the sealing portion 12d extends along the circumference of the through hole 12 to form a closed ring structure, and the sealing ring 3 is interference-fitted with the sealing portion 12d. In this way, the sealing effect can be further improved.

[0072] In some embodiments, the electrode column 2 is formed with a connection portion (not shown in the figure), which is located outside the barrel 1 and has a threaded structure on the outer surface. In this way, it is convenient to connect the electrode column 2 to the external circuit structure. Of course, the connection portion may not be provided, and those skilled in the art can make their own choice according to actual use requirements.

[0073] In some embodiments, the electrode column 2 is an integrated structure, that is, the above-mentioned limiting portion 21, positioning portion 23, stopper portion 22, connecting portion, etc. can be formed in an integrated manner on the electrode column 2. Alternatively, the electrode column 2 may include a body, and at least a portion of the above-mentioned structure can be connected to the body by, for example, bonding, welding, etc.

[0074] In some embodiments, reference Figure 2 The insulating cylinder includes a conductive bolt 4, and a threaded hole is formed on the end surface of the first end 2a, and the conductive bolt 4 is screwed into the threaded hole. In this way, on the one hand, the stability of the connection between the electrode column 2 and the electrical component arranged inside the cylinder body 1 can be further improved, and the risk of desoldering can be reduced. On the other hand, the assembly steps can be simplified. Of course, the conductive bolt 4 can also be omitted, and the end surface of the first end 2a or other parts of the electrode column 2 can be directly welded to the electrical component.

[0075] One or more implementation methods mentioned above will be described in more detail below in conjunction with a specific example.

[0076] Reference Figure 1 and Figure 2 The insulating cylinder includes a cylinder body 1 and an electrode column 2. One end of the cylinder body 1 in the axial direction has an end wall 11. The middle part of the end wall 11 protrudes to form a boss 111. The through hole 12 passes through the boss 111 along the cylinder body 1.

[0077] Reference Figure 3The electrode column 2 is coaxially arranged with the cylinder 1 , the first end 2 a of the electrode column 2 is arranged inside the cylinder 1 , and the second end 2 b extends to the outside of the cylinder 1 through the through hole 12 .

[0078] Reference Figure 4 The electrode column 2 forms a limited portion 21, and the limited portion 21 is formed into a hexagonal column structure. Figure 5 The inner surface of the through hole 12 is formed with six limiting surfaces 12a corresponding to the six side surfaces of the hexagonal prism structure. Figure 6 The six side surfaces of the hexagonal prism structure are respectively fitted with the six limiting surfaces 12 a, thereby achieving a non-rotation fit between the electrode column 2 and the cylinder 1 .

[0079] The diameter of the hexagonal column structure is greater than the diameter of other structures between the second end 2b of the electrode column 2 and the limiting portion 21, so that the first step surface 21a is formed on the side of the hexagonal column structure facing the second end 2b. Figure 5 The inner surface of the through hole 12 is partially raised to form a first stop surface 12b facing the first end 2a, and the first stop surface 12b extends along the circumference of the through hole 12 to form an annular closed structure. Figure 3 The first step surface 21 a abuts against the first stop surface 12 b , thereby limiting the movement of the electrode column 2 along its axial direction.

[0080] Reference Figure 4 The electrode column 2 is also formed with a stopper 22, which is arranged on the side of the limiting portion 21 close to the first end 2a. The stopper 22 is formed into a cylindrical structure, one end of which is connected to the limiting portion 21 in the axial direction, and the other end extends to the second end 2b. The diameter of the stopper 22 is larger than the diameter of the limiting portion 21, so that the stopper 22 forms a second step surface 22a on the side facing the second end 2b. Figure 5 The inner surface portion of the through hole 12 is raised to form a second stop surface 12c, and the second stop surface 12c extends along the circumference of the through hole 12 to form an annular closed structure. The second step surface 22a abuts against the second stop surface 12c, thereby further improving the limiting effect.

[0081] Reference Figure 4 The electrode column 2 is also formed with a positioning portion 23, which is arranged on the side of the limiting portion 21 close to the second end 2b. The positioning portion 23 is also formed in a cylindrical structure, and one end in the axial direction is connected to the limiting portion 21. The diameter of the positioning portion 23 is smaller than the diameter of the limiting portion 21, but larger than the diameter of the second end 2b and the other parts of the electrode column 2 therebetween, so that the surface of the positioning portion 23 facing the second end 2b forms a third step surface 23a. After the electrode column 2 is assembled in place, refer to Figure 1 and Figure 3The third step surface 23a is located outside the cylinder 1, and the distance between it and the end surface of the boss 111 is about 1 mm. During the actual assembly process, the operator can judge whether the electrode column 2 is assembled in place based on this.

[0082] The electrode column 2 is also formed with a connecting portion (not shown in the figure), and the outer surface of the connecting portion has a threaded structure, so that the electrode column 2 is easily connected to an external circuit structure.

[0083] Reference Figure 2 The insulating tube also includes a sealing ring 3, refer to Figure 4 The positioning portion 23 of the electrode column 2 is formed with a mounting groove 24, which extends along the circumference of the electrode column 2 to form an annular closed structure, and a portion of the sealing ring 3 is disposed in the mounting groove 24. Figure 3 and Figure 5 The inner surface of the through hole 12 is partially raised to form a sealing portion 12d, and the sealing portion 12d extends along the circumference of the through hole 12 to form an annular closed structure. The sealing ring 3 is interference fit with the sealing portion 12d, thereby achieving a better sealing effect.

[0084] An embodiment of the present application also provides a voltage sensor, which includes an insulating cylinder as described in any of the above embodiments, and an electrical component, wherein the electrical component is arranged in the cylinder body 1, and the electrical component includes a pressure measuring piece, which is conductively connected to the electrode column 2.

[0085] As an example, the pressure measuring device includes a high voltage capacitor and a low voltage capacitor, and the high voltage capacitor is connected to the electrode column 2. The low voltage capacitor and the high voltage capacitor are connected in a mutual inductance manner, thereby realizing voltage conversion and further realizing pressure measurement.

[0086] The specific structure of the voltage sensor can refer to the relevant technology in the field, which will not be described in detail here.

[0087] In some embodiments, the interior of the cylinder 1 may be filled with colloid.

[0088] An embodiment of the present application also provides an energy extraction device, which includes an insulating cylinder as described in any of the above embodiments, and an electrical component, which is arranged inside the cylinder 1 and includes an energy extraction component, which is conductively connected to the electrode column 2.

[0089] As an example, the energy extraction component may include an energy extraction capacitor and a control circuit. The energy extraction capacitor may be connected to the electrode column 2 , and the control circuit is connected to the energy extraction capacitor to control the charging and discharging operations.

[0090] The specific structure of the energy extraction component can refer to the relevant technology in the field and will not be described in detail here.

[0091] An embodiment of the present application further provides a pole-mounted circuit breaker, which may include a voltage sensor as described in any of the above embodiments and / or an energy extraction device as described in any of the above embodiments.

[0092] As an example, a pole-mounted circuit breaker may include a circuit breaker body and three poles, wherein the three poles are respectively connected to three-phase electricity. A voltage sensor may be respectively arranged inside or outside each pole, and / or the above-mentioned energy extraction device may be arranged inside at least some of the poles, and the energy extraction device is used to power electrical components (such as a controller and a voltage sensor) in the pole-mounted circuit breaker.

[0093] The specific structure of the pole-mounted circuit breaker can refer to the relevant technology in the field, and will not be repeated here.

[0094] In the description of the present application, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In the present application, the schematic representation of the above terms is not necessarily for the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine different embodiments or examples described in the present application and the features of different embodiments or examples without contradiction.

[0095] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An insulating cylinder, characterized in that: The insulating cylinder comprises: A cylinder, wherein an end wall of the cylinder in the axial direction is formed with a through hole, the end wall part is raised to form a boss, and the through hole passes through the boss; An electrode column, wherein the first axial end of the electrode column is disposed inside the cylinder, and the second end of the electrode column extends to the outside of the cylinder through the through hole, wherein the electrode column forms a limiting portion, and the limiting portion cooperates with the cylinder to prevent rotation so as to limit the relative rotation between the electrode column and the cylinder; The electrode column is used to connect the electrical component disposed inside the cylinder to the circuit structure outside the cylinder, the electrical component includes a high-voltage capacitor, and the first end of the electrode column is used to be welded to the high-voltage capacitor; The electrode column is formed with a connecting portion, the connecting portion is located outside the barrel and has a threaded structure on the outer surface, and the electrode column is connected to the circuit structure outside the barrel through the threaded structure; The electrode column is formed with a positioning portion, and the positioning portion is arranged on the side of the limiting portion close to the second end. The positioning portion is a columnar structure, and a diameter is larger than a diameter of other parts of the electrode column between the second end and the positioning portion, so that the positioning portion forms a third step surface, and the third step surface is located outside the cylinder, and the distance between the third step surface and the end face of the boss is not less than 0.5 mm.

2. The insulating cylinder according to claim 1, characterized in that: The limiting portion is formed as a polygonal columnar structure, and the inner surface of the through hole is formed with a plurality of limiting surfaces corresponding to the plurality of side surfaces on the circumference of the limiting portion, and the plurality of side surfaces on the circumference of the limiting portion are respectively fitted with the plurality of limiting surfaces, thereby achieving anti-rotation cooperation between the limiting portion and the cylinder.

3. The insulating cylinder according to claim 1, characterized in that: The limiting portion has a first step surface facing the second end, and the inner surface portion of the through hole is raised to form a first stop surface facing the first end, and the first step surface abuts against the first stop surface.

4. The insulating cylinder according to claim 1 or 3, characterized in that: The electrode column is formed with a stopper, the stopper is arranged on a side of the limiting portion close to the first end, and the stopper has a second step surface facing the second end. The inner surface portion of the through hole is raised to form a second stop surface facing the first end, and the second step surface abuts against the second stop surface, or the second step surface abuts against the inner surface of the end wall.

5. The insulating cylinder according to claim 1, characterized in that: The insulating cylinder comprises a sealing ring, which is sleeved on the electrode column and fits with the inner surface of the through hole.

6. The insulating cylinder according to claim 5, characterized in that: The electrode column is formed with a mounting groove, and the mounting groove extends along the circumference of the electrode column to form a closed ring structure. At least a part of the sealing ring is located in the mounting groove.

7. The insulating cylinder according to claim 5 or 6, characterized in that: The inner surface of the through hole is partially raised to form a sealing portion, and the sealing portion extends along the circumference of the through hole to form a closed annular structure, and the sealing ring is interference-fitted with the sealing portion.

8. The insulating cylinder according to claim 1, characterized in that: The insulating cylinder includes a conductive bolt, and a threaded hole is formed on an end surface of the first end, and the conductive bolt is screwed into the threaded hole.

9. A voltage sensor, characterized in that: The voltage sensor comprises: The insulating cylinder according to any one of claims 1 to 8; and The electrical component is arranged in the cylinder, and the electrical component includes a pressure measuring piece, and the pressure measuring piece is conductively connected to the electrode column.

10. An energy extraction device, characterized in that: The energy taking device comprises: The insulating cylinder according to any one of claims 1 to 8, and The electrical component is arranged in the cylinder, and the electrical component includes an energy extraction component, and the energy extraction component is conductively connected to the electrode column.

11. A pole mounted circuit breaker, characterized in that: The pole mounted circuit breaker comprises the voltage sensor according to claim 9 and / or the energy extraction device according to claim 10.

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