A power distribution network fault self-healing switch

Abstract

The application discloses a power distribution network fault self-healing switch and relates to the technical field of power distribution network equipment. The power distribution network fault self-healing switch comprises a support shell, a fixed disc is fixedly arranged in the support shell, and a sliding hole is arranged at the center of the fixed disc. The electromagnetic force caused by short-circuit current is directly converted into the deterministic switching driving force of the contact rod between the double-conductive interfaces through the linkage of the ejector rod and guide groove mechanism and the self-locking assembly, the instantaneous removal of the fault loop and the rapid input of the standby loop are realized, the power distribution network fault self-healing time is significantly shortened, the differentiated depth and stepped cross-section design of the first sink groove, the second sink groove, the stop groove and the partition plate in the guide groove mechanism are matched with the locking plate and the locking rod of the self-locking assembly, the automatic triggering of the switching action, the locking and keeping of the intermediate position and the forced guiding of the reset path are realized in the reciprocating sliding of the ejector rod, the misoperation or the non-in-place switching of the contact rod under the disturbance of the fault current is effectively avoided, and the reliability and stability of the switch action are greatly improved.

Description

Technical Field

[0001] This invention relates to the technical field of power distribution network equipment, and in particular to a self-healing switch for power distribution network faults. Background Technology

[0002] With the continuous advancement of smart distribution network construction, increasingly higher demands are being placed on the rapid isolation and self-healing capabilities of power system faults. Various switching devices widely used in distribution networks, as key actuators for isolating faulty sections and restoring power supply to non-faulty sections, directly determine the actual effectiveness of the distribution network's self-healing function through their operating speed, reliability, and electrical life. Currently, traditional distribution network switches mostly use electromagnetic relays, spring-operated mechanisms, or motor drives to switch circuits on and off. These switching structures can meet basic switching requirements under normal load conditions, but in the event of a short-circuit fault, the operation of traditional switches relies on electrical signal detection and external driving power. From the occurrence of the fault to the switch action, multiple stages are required, including signal acquisition, judgment, command issuance, and mechanism activation, resulting in a long action delay and making it difficult to meet the millisecond-level rapid self-healing requirements of the distribution network. Summary of the Invention

[0003] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0004] In view of the problems existing in the above and / or existing self-healing switches for distribution network faults, the present invention is proposed.

[0005] Therefore, the problem to be solved by the present invention is how to solve the problem that existing equipment has a long action delay because it needs to go through multiple stages such as signal acquisition, judgment, command issuance and mechanism start-up from the occurrence of fault.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a self-healing switch for power distribution network faults, comprising: a supporting shell, a fixed plate fixedly disposed inside the shell, a sliding hole provided at the center of the fixed plate, a top rod slidably disposed inside the sliding hole, a positioning sleeve rotatably disposed on one side of the sliding hole, a contact rod disposed at the top of the positioning sleeve, conductive interfaces provided on both sides of the contact rod on the fixed plate, a conductive coil sleeved on one end of the top rod, and the top rod and the conductor coil slidingly engaged, one end of the conductive coil being connected to the contact rod, a return spring fixedly disposed on one end of the top rod, an installation groove provided inside the positioning sleeve at a position corresponding to the contact rod, a self-locking component disposed inside the installation groove, and a guide groove mechanism provided at a position corresponding to the self-locking component on the top rod.

[0007] As a preferred embodiment of the self-healing switch for power distribution network faults described in this invention, the inner side of the fixed plate is provided with an arc extinguishing component, including a sliding groove opened inside the fixed plate and located between two conductive interfaces. A baffle is slidably arranged inside the sliding groove, and a retraction spring is opened inside the baffle. The retraction spring is fixedly connected to the plate surface of the fixed plate. It also includes an arc-shaped push plate fixedly arranged on one side of the contact rod. The arc-shaped surface of the arc-shaped push plate faces the baffle, and the end of the baffle is arc-shaped.

[0008] As a preferred embodiment of the self-healing switch for power distribution network faults described in this invention, the self-locking component includes a plug rod disposed inside the mounting slot, a support spring disposed inside the plug rod, a locking rod disposed at the bottom end of the plug rod, and a locking plate disposed at the bottom end of the locking rod.

[0009] As a preferred embodiment of the self-healing switch for power distribution network faults described in this invention, the guide groove mechanism includes a first groove, which is opened on the outer periphery of the top rod and is set at an angle to the axis of the top rod; a second groove, which is opened on the outer periphery of the top rod; the positions of the second groove and the first groove are symmetrical about the axis of the top rod; the depth of the second groove is greater than the depth of the first groove; the ends of the first groove and the second groove are provided with a connection point, and the connection point corresponds to the position of the axis of the top rod.

[0010] As a preferred embodiment of the self-healing switch for power distribution network faults described in this invention, the guide groove mechanism further includes a stop groove, which is opened on the outer periphery of the top rod. The straight direction of the stop groove corresponds to the axis of the top rod. The stop groove is connected to the connection point of the first sink groove and the second sink groove. The bottom surface of the stop groove is lower than the bottom surface of the second sink groove.

[0011] As a preferred embodiment of the self-healing switch for power distribution network faults described in this invention, a partition is fixedly installed inside the connection point, a guide groove is opened inside the partition, the guide groove is connected to the stop groove, there is a gap between the partition and the second sink groove, and the height of the gap is the same as the thickness of the locking plate.

[0012] As a preferred embodiment of the self-healing switch for power distribution network faults described in this invention, the widths of the first and second sinks are the same as the diameter of the locking plate, the width of the stop slot is the same as the diameter of the locking rod, a rising slot is provided at the end of the stop slot away from the connection point, the rising slot is slidably engaged with the locking plate, a transverse slot is provided at the top of the rising slot, and the transverse slot is connected to the end of the first sink that is away from the connection point.

[0013] As a preferred embodiment of the self-healing switch for power distribution network faults described in this invention, the bottom end of the rising groove is provided with a reset hole, and a reset assembly is provided inside the reset hole. The reset assembly includes a reset rod that is slidably disposed inside the reset hole. A toothed plate is fixedly disposed on one side of the reset rod. A rotating groove is provided inside the top rod at a position corresponding to the toothed plate. A gear is rotatably disposed inside the rotating groove. The gear meshes with the toothed plate. A drive shaft is fixedly disposed at the center of the gear. One end of the drive shaft extends out of the top rod. A handle turntable is fixedly disposed at one end of the drive shaft.

[0014] As a preferred embodiment of the self-healing switch for power distribution network faults described in this invention, the top of the supporting shell is provided with a clearance groove, a connecting block is fixedly installed inside the clearance groove, and a rotating ring is provided on the outer periphery of the supporting shell, the rotating ring being fixedly connected to the contact rod through the connecting block.

[0015] As a preferred embodiment of the self-healing switch for power distribution network faults described in this invention, wherein: the side wall of the transverse slot is provided with a limiting component, the limiting component includes an inner recess groove formed on the side wall of the transverse slot, an inner recess spring is provided inside the inner recess groove, one end of the inner recess spring is provided with a limiting plate, and the limiting plate is inclined on the side facing the rising slot.

[0016] The beneficial effects of this invention are as follows: By linking the top rod with the guide groove mechanism and the self-locking component, the electromagnetic force caused by the short-circuit current is directly converted into a deterministic switching driving force for the contact rod between the two conductive interfaces, realizing the instantaneous disconnection of the fault circuit and the rapid activation of the backup circuit, significantly shortening the self-healing time of the power distribution network fault. The differentiated depth and stepped cross-section design of the first sink groove, the second sink groove, the stop groove and the partition in the guide groove mechanism, together with the locking plate and locking rod of the self-locking component, realize the automatic triggering of the switching action, the locking and holding of the intermediate position and the forced guidance of the reset path during the reciprocating sliding of the top rod, effectively avoiding the contact rod from malfunctioning or failing to switch in place under the disturbance of fault current, and greatly improving the reliability and stability of the switching action. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a scenario diagram of a self-healing switch for a power distribution network fault.

[0019] Figure 2 This is a diagram showing the internal structure of the supporting casing of a self-healing switch for a power distribution network fault.

[0020] Figure 3 This is a structural diagram of the arc-extinguishing component of a self-healing switch for power distribution network faults.

[0021] Figure 4 This is a structural diagram of the self-locking component and top rod of a self-healing switch for power distribution network faults.

[0022] Figure 5 Structure of the guide groove mechanism for self-healing switches in power distribution networks Figure 1 .

[0023] Figure 6 Structure of the guide groove mechanism for self-healing switches in power distribution networks Figure 2 .

[0024] Figure 7 This is a structural diagram of the self-locking component of a self-healing switch for a power distribution network fault.

[0025] Figure 8 Cross-sectional view of the top rod of the self-healing switch for distribution network faults Figure 1 .

[0026] Figure 9 Cross-sectional view of the top rod of the self-healing switch for distribution network faults Figure 2 .

[0027] In the diagram: 1. Support shell; 101. Clearance groove; 102. Connecting block; 103. Rotating ring; 2. Fixing plate; 3. Sliding hole; 4. Top rod; 5. Positioning sleeve; 6. Contact rod; 7. Conductive interface; 8. Conductive coil; 9. Return spring; 10. Mounting groove; 11. Self-locking assembly; 111. Insert rod; 112. Support spring; 113. Locking rod; 114. Locking plate; 12. Guide groove mechanism; 121. First recessed groove; 122. Second recessed groove; 123. Connection point; 124. Stop groove; 125. Partition plate; 126. Guide 127. Groove; 128. Gap; 129. Rising groove; 1210. Horizontal groove; 1211. Reset hole; 1211. Reset assembly; 12111. Reset rod; 12112. Gear plate; 12113. Rotating groove; 12114. Gear; 12115. Drive shaft; 12116. Handle turntable; 1212. Limiting assembly; 12121. Inner retraction groove; 12122. Inner retraction spring; 12123. Limiting plate; 13. Arc extinguishing assembly; 131. Sliding groove; 132. Baffle; 133. Retraction spring; 134. Arc-shaped push plate. Detailed Implementation

[0028] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0029] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0030] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0031] Example 1, referring to Figures 1-9 This is the first embodiment of the present invention. This embodiment provides a self-healing switch for power distribution network faults. The self-healing switch for power distribution network faults includes a supporting shell 1, a guide groove mechanism 12, and a self-locking component 11.

[0032] Specifically, the supporting shell 1 has a fixed plate 2 inside, a sliding hole 3 is provided at the center of the fixed plate 2, a top rod 4 is slidably provided inside the sliding hole 3, a positioning sleeve 5 is rotatably provided on one side of the sliding hole 3, a contact rod 6 is provided at the top of the positioning sleeve 5, and conductive interfaces 7 are provided on both sides of the contact rod 6 on the fixed plate 2.

[0033] The supporting shell 1 is made of insulating material, and the fixing plate 2 is fixedly installed inside it by bolts. The fixing plate 2, as the core support structure of the entire switch, is made of high-strength ceramic material. The sliding hole 3 opened at the center of the fixing plate 2 provides a straight guide channel for the push rod 4. The inner wall of the sliding hole 3 slides with the outer periphery of the push rod 4, and the push rod 4 can slide freely along the axis inside the sliding hole 3.

[0034] The positioning sleeve 5 is rotatably mounted on the surface of the fixed disk 2 on one side of the sliding hole 3. The positioning sleeve 5 is rotatably engaged with the fixed disk 2 through a bearing. The top of the positioning sleeve 5 is fixedly connected to the contact rod 6, which is made of copper alloy. The contact rod 6 rotates synchronously with the positioning sleeve 5. Two conductive interfaces 7 are symmetrically arranged on the surface of the fixed disk 2, located on both sides of the contact rod 6. The conductive interfaces 7 are connected to the external power distribution line through wires. During the rotation, the contact rod 6 can selectively contact and conduct with the conductive interface 7 on either side, thereby realizing the switching connection of the circuit.

[0035] During normal operation, the contact rod 6 maintains contact with the conductive interface 7 at the corresponding position of the first sink 121, forming a current path. When a short circuit fault occurs in the line, the push rod 4 slides along the sliding hole 3 under the action of electromagnetic force. The axial movement of the push rod 4 drives the positioning sleeve 5 to rotate the contact rod 6, so that the contact rod 6 switches from the current conductive interface 7 to the other conductive interface 7, completing the isolation of the faulty circuit and the activation of the backup circuit, realizing the self-healing of the power distribution network fault.

[0036] Specifically, a conductive coil 8 is sleeved on one end of the push rod 4, and the push rod 4 and the wire coil slide together. One end of the conductive coil 8 is connected to the contact rod 6, and a return spring 9 is fixedly installed on one end of the push rod 4.

[0037] A conductive coil 8 is wrapped around the outer periphery of one end of the push rod 4. The winding direction of the conductive coil 8 is perpendicular to the axis of the push rod 4. A sliding gap 127 is formed between the conductive coil 8 and the push rod 4. The conductive coil 8 does not directly contact the push rod 4. One end of the conductive coil 8 is electrically connected to the contact rod 6 through a flexible wire. The other end of the conductive coil 8 is connected to the power supply terminal. The number of turns and wire diameter of the conductive coil 8 are designed according to the rated current and short-circuit current parameters of the power distribution network. During normal operation, the conductive coil 8 carries the normal load current, and the magnetic field strength generated is insufficient to push the push rod 4 to move.

[0038] One end of the return spring 9 is fixedly connected to the end of the push rod 4, and the other end of the return spring 9 is fixedly connected to the surface of the fixed plate 2. The return spring 9 is arranged along the axial direction of the push rod 4. The return spring 9 is kept in a compressed state when the push rod 4 is in the initial position, providing the push rod 4 with a restoring force toward the initial position.

[0039] When a short circuit occurs in the circuit, the current through the conductive coil 8 increases sharply, and the magnetic field strength generated by the conductive coil 8 also increases rapidly. The magnetic force pushes the push rod 4 to overcome the elastic force of the return spring 9 and move along the sliding hole 3 away from the conductive coil 8. The movement stroke of the push rod 4 is limited by the length of the sliding hole 3 and the compression limit of the return spring 9. When the short circuit fault is eliminated, the current in the conductive coil 8 returns to the normal value, the magnetic force decreases to below the elastic force of the return spring 9, and the return spring 9 pulls the push rod 4 back to the initial position.

[0040] Specifically, the positioning sleeve 5 has an installation groove 10 at a position corresponding to the contact rod 6, and a self-locking component 11 is provided inside the installation groove 10.

[0041] The mounting groove 10 is formed on the inner peripheral side wall of the positioning sleeve 5. The position of the mounting groove 10 corresponds to the projection position of the axis of the contact rod 6 in the radial direction of the positioning sleeve 5. The mounting groove 10 extends along the radial direction of the positioning sleeve 5, and the opening of the mounting groove 10 faces the inner cavity of the positioning sleeve 5.

[0042] The self-locking component 11 is installed inside the mounting groove 10. One end of the self-locking component 11 extends out of the mounting groove 10 and into the inner cavity of the positioning sleeve 5. The self-locking component 11 cooperates with the guide groove mechanism 12 provided on the outer periphery of the top rod 4. The extended end of the self-locking component 11 can be embedded in the guide groove mechanism 12 and slide along the trajectory of the guide groove mechanism 12.

[0043] The mounting groove 10 provides installation space and guide channel for the self-locking assembly 11. The self-locking assembly 11 can extend and retract along the depth direction of the mounting groove 10 inside the mounting groove 10. Driven by the guide groove mechanism 12, the self-locking assembly 11 generates radial displacement in the mounting groove 10, thereby causing the positioning sleeve 5 to rotate relative to the fixed plate 2. When the positioning sleeve 5 rotates, it drives the contact rod 6 to rotate synchronously, realizing the switching action of the contact rod 6 between the two conductive interfaces 7.

[0044] Specifically, a guide groove mechanism 12 is provided at the position corresponding to the top rod 4 and the self-locking assembly 11.

[0045] The guide groove mechanism 12 is formed on the outer peripheral side wall of the top rod 4. The guide groove mechanism 12 forms a closed guide path on the outer peripheral side of the top rod 4. The protruding end of the self-locking component 11 is embedded in the guide groove mechanism 12. When the top rod 4 slides axially along the sliding hole 3, the protruding end of the self-locking component 11 slides along the path of the guide groove mechanism 12. Since the path of the guide groove mechanism 12 has a combined axial and radial guiding effect on the outer peripheral side of the top rod 4, the protruding end of the self-locking component 11 generates radial displacement along the mounting groove 10 under the drive of the guide groove mechanism 12. The radial displacement is transmitted to the positioning sleeve 5 through the self-locking component 11, driving the positioning sleeve 5 to rotate, so that the contact rod 6 switches between the two conductive interfaces 7.

[0046] The path design of the guide groove mechanism 12 determines the radial position of the self-locking component 11 at different axial positions of the push rod 4, thereby controlling the rotation angle and rotation direction of the positioning sleeve 5. During the reciprocating sliding process of the push rod 4, the self-locking component 11 passes through different groove segments along the path of the guide groove mechanism 12 in sequence, realizing the reciprocating switching of the contact rod 6 between the two conductive interfaces 7 and the locking and holding in the middle position.

[0047] Example 2, refer to Figures 2-9 This is the second embodiment of the present invention, which is based on the previous embodiment.

[0048] Specifically, the inner side of the fixed disk 2 is provided with an arc extinguishing component 13, including a sliding groove 131 opened inside the fixed disk 2 and located between two conductive interfaces 7. A baffle 132 is slidably arranged inside the sliding groove 131. A retraction spring 133 is opened inside the baffle 132. The retraction spring 133 is fixedly connected to the disk surface of the fixed disk 2. It also includes an arc-shaped push plate 134 fixedly arranged on one side of the contact rod 6. The arc-shaped surface of the arc-shaped push plate 134 faces the baffle 132, and the end of the baffle 132 is arc-shaped.

[0049] The arc extinguishing component 13 is disposed on the inner side of the fixed disk 2, in the middle area between the two conductive interfaces 7. The sliding groove 131 is opened along the radial direction of the fixed disk 2. The cross-section of the sliding groove 131 is rectangular. The baffle 132 is a rectangular plate structure. The width of the baffle 132 is adapted to the width of the sliding groove 131. The baffle 132 is fitted inside the sliding groove 131 and slides along the extension direction of the sliding groove 131.

[0050] The retraction spring 133 is disposed in the internal cavity of the baffle 132. One end of the retraction spring 133 is fixedly connected to the internal cavity wall of the baffle 132, and the other end of the retraction spring 133 is fixedly connected to the disk surface of the fixed disk 2. The retraction spring 133 is always in a compressed state, providing the baffle 132 with elastic force toward the center of the fixed disk 2.

[0051] The arc-shaped push plate 134 is fixedly installed on one side edge of the contact rod 6. The arc-shaped push plate 134 is integrally formed or welded to the contact rod 6. The arc-shaped surface of the arc-shaped push plate 134 faces the arc-shaped end of the baffle 132. The arc-shaped push plate 134 rotates synchronously with the contact rod 6.

[0052] When the contact rod 6 rotates to switch from one conductive interface 7 to another, the contact rod 6 drives the arc-shaped push plate 134 to rotate synchronously. The arc-shaped surface of the arc-shaped push plate 134 gradually contacts the arc-shaped end of the baffle 132. Since the end of the baffle 132 is arc-shaped, the arc-shaped surface of the arc-shaped push plate 134 and the arc-shaped end of the baffle 132 form a smooth rolling contact. During the rotation, the arc-shaped push plate 134 pushes the baffle 132 along the sliding groove 131 in a direction away from the center of the fixed disk 2. When the baffle 132 moves, it compresses the return spring 133. When the contact rod 6 completes the switching, the arc-shaped push plate 134 passes over the baffle 132. Under the elastic force of the return spring 133, the baffle 132 resets and pops out along the sliding groove 131 towards the center of the fixed disk 2.

[0053] During the ejection process, the baffle 132 quickly isolates the air gap 127 between the two conductive interfaces 7. Through the mechanical isolation effect of the baffle 132, combined with the elongation and cooling of the electric arc, the electric arc is quickly extinguished, avoiding the electric arc from causing ablation damage to the conductive interfaces 7 and the contact rod 6, thereby improving the electrical life of the switch and the reliability of its self-healing action.

[0054] Specifically, the self-locking assembly 11 includes a rod 111 disposed inside the mounting groove 10, a support spring 112 disposed inside the rod 111, a locking rod 113 disposed at the bottom end of the rod 111, and a locking plate 114 disposed at the bottom end of the locking rod 113.

[0055] The insertion rod 111 is a cylindrical rod structure. The insertion rod 111 is slidably disposed inside the mounting groove 10. The axis of the insertion rod 111 coincides with the extension direction of the mounting groove 10. The outer diameter of the insertion rod 111 is adapted to the inner diameter of the mounting groove 10. The insertion rod 111 slides along the depth direction of the mounting groove 10.

[0056] The support spring 112 is disposed in the axial cavity inside the insertion rod 111. One end of the support spring 112 is fixedly connected to the inner cavity wall of the insertion rod 111, and the other end of the support spring 112 is fixedly connected to the bottom wall of the mounting groove 10. The support spring 112 is always in a compressed state, providing the insertion rod 111 with elastic force in the direction of the opening of the mounting groove 10, so that the insertion rod 111 tends to extend out of the mounting groove 10.

[0057] The locking rod 113 is fixedly connected to the bottom end of the insertion rod 111. The diameter of the locking rod 113 is smaller than the diameter of the insertion rod 111. The locking rod 113 extends through the opening of the mounting groove 10 into the inner cavity of the positioning sleeve 5. The axis of the locking rod 113 coincides with the axis of the insertion rod 111.

[0058] The locking plate 114 is fixedly installed at the bottom end of the locking rod 113. The locking plate 114 is a circular plate structure. The diameter of the locking plate 114 is larger than the diameter of the locking rod 113. The end face of the locking plate 114 is perpendicular to the axis of the locking rod 113. The locking plate 114 is embedded in the guide groove mechanism 12 and slides in the guide groove mechanism 12. The diameter of the locking plate 114 is adapted to the width of the corresponding groove segment in the guide groove mechanism 12.

[0059] During the sliding process of the top rod 4, the locking plate 114 slides along the path of the guide groove mechanism 12. The guiding force of the guide groove mechanism 12 on the locking plate 114 is transmitted to the positioning sleeve 5 through the locking rod 113 and the insertion rod 111, driving the positioning sleeve 5 to rotate. The support spring 112 ensures that the locking plate 114 is always pressed against the bottom surface of the guide groove mechanism 12, ensuring that the locking plate 114 will not come out of the guide groove mechanism 12 during the sliding process. At the same time, the elastic force of the support spring 112 enables the locking plate 114 to generate corresponding axial displacement when switching between grooves of different depths.

[0060] Specifically, the guide groove mechanism 12 includes a first sink groove 121, which is opened on the outer periphery of the push rod 4 and is set at an angle to the axis of the push rod 4; and a second sink groove 122, which is opened on the outer periphery of the push rod 4. The positions of the second sink groove 122 and the first sink groove 121 are symmetrical about the axis of the push rod 4. The depth of the second sink groove 122 is greater than the depth of the first sink groove 121. The ends of the first sink groove 121 and the second sink groove 122 are provided with a connecting point 123, and the connecting point 123 corresponds to the position of the axis of the push rod 4.

[0061] The first groove 121 is a straight groove formed on the outer peripheral side wall of the push rod 4. The extension direction of the first groove 121 forms an angle with the axis of the push rod 4. The starting end of the first groove 121 is located on the outer peripheral side of the push rod 4 near the conductive coil 8. The end of the first groove 121 extends towards the axial center of the push rod 4. The width of the first groove 121 is adapted to the diameter of the locking plate 114. The bottom surface of the first groove 121 is a plane. The depth of the first groove 121 is a fixed value relative to the surface of the push rod 4.

[0062] The second recess 122 is a straight groove formed on the outer peripheral side wall of the push rod 4. The positions of the second recess 122 and the first recess 121 are symmetrically distributed about the axis of the push rod 4. The extension direction of the second recess 122 is symmetrical about the axis of the push rod 4 with respect to the extension direction of the first recess 121. The width of the second recess 122 is adapted to the diameter of the locking plate 114. The depth of the second recess 122 is greater than the depth of the first recess 121. The starting end of the second recess 122 corresponds to the starting end of the first recess 121 in the axial position of the push rod 4. The ending end of the second recess 122 corresponds to the ending end of the first recess 121 in the axial position of the push rod 4.

[0063] The connecting point 123 is located on the outer periphery of the push rod 4 near the end of the return spring 9. The connecting point 123 connects the end of the first sinker 121 with the end of the second sinker 122. The connecting point 123 occupies a certain angle in the circumferential direction of the push rod 4. The center position of the connecting point 123 corresponds to the projection position of the axis of the push rod 4 in the radial direction. The connecting point 123 provides a transition channel for the locking plate 114 to enter the end of the second sinker 122 from the end of the first sinker 121.

[0064] When the push rod 4 is pushed axially by the magnetic force generated by the short-circuit current, the locking plate 114 slides from the beginning end of the first sink 121 to the end end of the first sink 121. Since the first sink 121 is set at an angle to the axis of the push rod 4, the locking plate 114 is pushed by the side wall of the first sink 121 during the sliding process and generates circumferential displacement. The circumferential displacement is transmitted to the positioning sleeve 5 through the locking rod 113 and the insertion rod 111, driving the positioning sleeve 5 to drive the contact rod 6 to rotate from one conductive interface 7 to another conductive interface 7. When the locking plate 114 slides to the connection point 123, the contact rod 6 rotates to the middle position between the two conductive interfaces 7.

[0065] Specifically, the guide groove mechanism 12 also includes a stop groove 124, which is opened on the outer periphery of the push rod 4. The straight direction of the stop groove 124 corresponds to the axis of the push rod 4. The stop groove 124 is connected to the connection point 123 of the first sinking groove 121 and the second sinking groove 122. The bottom surface of the stop groove 124 is lower than the bottom surface of the second sinking groove 122.

[0066] The stop groove 124 is a straight groove formed on the outer peripheral side wall of the push rod 4. The extension direction of the stop groove 124 is parallel to the axis of the push rod 4. One end of the stop groove 124 is connected to the connection point 123, and the other end of the stop groove 124 extends towards the axial center of the push rod 4. The width of the stop groove 124 is less than the width of the first recess 121 and the second recess 122. The width of the stop groove 124 is adapted to the diameter of the locking rod 113. The bottom surface of the stop groove 124 in the radial direction of the push rod 4 is greater than the bottom surface of the second recess 122 in the radial direction of the push rod 4, that is, the depth of the stop groove 124 is greater than the depth of the second recess 122.

[0067] When the locking plate 114 slides from the first sink 121 to the connection point 123, the locking plate 114 cannot enter the stop 124 because the width of the stop 124 is smaller than the diameter of the locking plate 114. Therefore, during the first movement, the locking plate 114 can only enter the position of the second sink 122.

[0068] When the locking plate 114 slides from the second sink 122 to the connecting point 123, the locking plate 114 falls onto the bottom surface of the stop groove 124 at the connecting point 123. Since the bottom surface of the stop groove 124 is lower than the bottom surface of the second sink 122, and the cross-section of the stop groove 124 is stepped, the wide end of the stop groove 124 engages with the locking plate 114, and the narrow end of the stop groove 124 engages with the locking rod 113. Therefore, the locking plate 114 smoothly transitions from the second sink 122 to the stop groove 124, the locking rod 113 enters the stop groove 124, and the locking plate 114 slides on the bottom surface of the stop groove 124. The stop groove 124 provides a guiding effect for the locking rod 113, so that the locking plate 114 moves linearly along the axial direction of the top rod 4 without axial deflection.

[0069] Specifically, a partition 125 is fixedly installed inside the connection 123. A guide groove 126 is opened inside the partition 125. The guide groove 126 is connected to the stop groove 124. There is a gap 127 between the partition 125 and the second sink 122. The height of the gap 127 is the same as the thickness of the locking plate 114.

[0070] The partition 125 is a fan-shaped plate structure. The partition 125 is fixedly installed inside the connection 123. One end of the partition 125 is fixedly connected to the side wall of the connection 123, and the other end of the partition 125 extends to the central area of ​​the connection 123. The partition 125 divides the connection 123 into upper and lower spaces. The top surface of the partition 125 is flush with the bottom surface of the first sink 121, and the bottom surface of the partition 125 is higher than the bottom surface of the second sink 122. A gap 127 is formed between the bottom surface of the partition 125 and the bottom surface of the second sink 122. The height of the gap 127 is equal to the thickness of the locking plate 114.

[0071] The partition 125 has a guide groove 126 inside, which extends through the thickness of the partition 125. One end of the guide groove 126 is connected to the stop groove 124, and the other end of the guide groove 126 extends to the side wall of the partition 125 facing the first sink 121. The width of the guide groove 126 is adapted to the diameter of the locking rod 113. The guide groove 126 provides a channel for the locking rod 113 to pass through the partition 125 from the stop groove 124.

[0072] When the locking plate 114 slides from the first sink 121 to the connecting point 123, the locking plate 114 slides along the bottom surface of the first sink 121 to the top surface of the partition 125. Since the top surface of the partition 125 is flush with the bottom surface of the first sink 121, the locking plate 114 slides smoothly to the top surface of the partition 125. At this time, the locking plate 114 is supported by the partition 125 and cannot enter the gap 127 below the partition 125. At this time, the locking plate 114 corresponds to the narrow end of the stop groove 124. Therefore, the locking plate 114 cannot enter the interior of the stop groove 124. When the push rod 4 retracts, it can only push the locking plate 114 and the locking rod 113 into the interior of the second sink 122.

[0073] When the locking plate 114 slides from the second sink 122 to the connection point 123, the locking plate 114 slides along the bottom surface of the second sink 122 into the gap 127. Since the height of the gap 127 is the same as the thickness of the locking plate 114, the locking plate 114 slides in the gap 127. The locking plate 114 smoothly transitions from the bottom surface of the second sink 122 to the bottom surface of the stop groove 124. The locking rod 113 is located in the guide groove 126, and the locking plate 114 slides into the stop groove 124 along with the axial movement of the top rod 4.

[0074] Specifically, the width of the first sinking groove 121 and the second sinking groove 122 is the same as the diameter of the locking plate 114, the width of the stop groove 124 is the same as the diameter of the locking rod 113, the end of the stop groove 124 away from the connection point 123 is provided with a rising groove 128, the rising groove 128 is slidably engaged with the locking plate 114, the top of the rising groove 128 is provided with a transverse groove 129, and the transverse groove 129 is connected to the end of the first sinking groove 121 away from the connection point 123.

[0075] The widths of the first sink 121 and the second sink 122 are set to be equal to the diameter of the locking plate 114. When the locking plate 114 slides in the first sink 121 and the second sink 122, a sliding fit is formed between the outer peripheral sidewall of the locking plate 114 and the sink wall. The locking plate 114 does not move circumferentially in the sink, ensuring that the locking plate 114 slides precisely along the extension direction of the sink.

[0076] The width of the stop groove 124 is set to be equal to the diameter of the locking rod 113. When the locking rod 113 slides in the stop groove 124, a sliding fit is formed between the outer peripheral sidewall of the locking rod 113 and the groove wall of the stop groove 124, and the locking rod 113 does not deflect circumferentially in the stop groove 124.

[0077] The rising groove 128 is located at one end of the stop groove 124 away from the connection point 123. The rising groove 128 is an inclined groove formed on the outer peripheral side wall of the push rod 4. The rising groove 128 extends outward from the bottom surface of the stop groove 124 along the radial direction of the push rod 4. The width of the rising groove 128 is adapted to the diameter of the locking plate 114.

[0078] A transverse groove 129 is provided at the top of the rising groove 128. The transverse groove 129 is a straight groove formed on the outer peripheral side wall of the top rod 4. The extension direction of the transverse groove 129 is perpendicular to the axis of the top rod 4. The width of the transverse groove 129 is adapted to the diameter of the locking plate 114. One end of the transverse groove 129 is connected to the top of the rising groove 128, and the other end of the transverse groove 129 is connected to the end of the first sinking groove 121 away from the connection point 123. The bottom surface of the transverse groove 129 is flush with the bottom surface of the first sinking groove 121. After the locking plate 114 slides from the rising groove 128 to the transverse groove 129, it slides back to the starting end of the first sinking groove 121 along the transverse groove 129.

[0079] Specifically, a reset hole 1210 is provided at the bottom end of the rising groove 128. A reset assembly 1211 is provided inside the reset hole 1210. The reset assembly 1211 includes a reset rod 12111 that is slidably disposed inside the reset hole 1210. A toothed plate 12112 is fixedly disposed on one side of the reset rod 12111. A rotating groove 12113 is provided inside the push rod 4 at a position corresponding to the toothed plate 12112. A gear 12114 is rotatably disposed inside the rotating groove 12113. The gear 12114 meshes with the toothed plate 12112. A drive shaft 12115 is fixedly disposed at the center of the gear 12114. One end of the drive shaft 12115 extends out of the push rod 4. A handle turntable 12116 is fixedly disposed at one end of the drive shaft 12115.

[0080] The reset hole 1210 is opened inside the push rod 4 at the bottom end of the rising groove 128. The reset hole 1210 extends in the radial direction of the push rod 4. The open end of the reset hole 1210 is connected to the bottom end of the rising groove 128. The axis of the reset hole 1210 corresponds to the position of the bottom end of the rising groove 128.

[0081] The reset rod 12111 is a cylindrical rod body. The reset rod 12111 is slidably disposed inside the reset hole 1210. One end of the reset rod 12111 extends to the bottom end of the rising groove 128, and the other end of the reset rod 12111 extends deep inside the reset hole 1210. The reset rod 12111 slides along the axial direction of the reset hole 1210, and the top end face of the reset rod 12111 is flush with the bottom surface of the rising groove 128.

[0082] The toothed plate 12112 is fixedly mounted on one side wall of the reset rod 12111. The toothed plate 12112 extends along the axial direction of the reset rod 12111, and the toothed surface of the toothed plate 12112 faces the rotating groove 12113 opened inside the push rod 4.

[0083] The rotating groove 12113 is opened inside the push rod 4 at a position corresponding to the toothed plate 12112. The rotating groove 12113 is connected to the reset hole 1210. The gear 12114 is rotatably installed inside the rotating groove 12113 through the bearing. The tooth surface of the gear 12114 meshes with the tooth surface of the toothed plate 12112. The axis of the gear 12114 is perpendicular to the axis of the reset rod 12111.

[0084] The drive shaft 12115 is fixedly inserted into the center hole of the gear 12114. One end of the drive shaft 12115 extends from the inside of the push rod 4 out of the outer peripheral side wall of the push rod 4. The extended end of the drive shaft 12115 is fixedly installed with the handle turntable 12116, which is located on the outer peripheral side of the push rod 4.

[0085] When the locking plate 114 enters the rising groove 128, the bottom surface of the locking plate 114 contacts the top end face of the reset rod 12111. The operator rotates the handle turntable 12116, which drives the gear 12114 to rotate in the rotating groove 12113 via the drive shaft 12115. The gear 12114 drives the reset rod 12111 to slide along the reset hole 1210 toward the rising groove 128 through meshing with the toothed plate 12112. The top end of the reset rod 12111 pushes the locking plate 114 to rise along the rising groove 128, so that the locking plate 114 moves from the bottom end of the rising groove 128 to the top end of the rising groove 128 and enters the transverse groove 129, thereby realizing the reset operation of the locking plate 114.

[0086] Specifically, the top of the supporting shell 1 is provided with an avoidance groove 101, and a connecting block 102 is fixedly installed inside the avoidance groove 101. A rotating ring 103 is provided on the outer periphery of the supporting shell 1, and the rotating ring 103 is fixedly connected to the contact rod 6 through the connecting block 102.

[0087] The clearance groove 101 is formed on the top wall of the supporting shell 1. The clearance groove 101 is a through groove structure that penetrates the wall of the supporting shell 1. The extension direction of the clearance groove 101 is parallel to the axial direction of the supporting shell 1. The connecting block 102 is fixedly installed inside the clearance groove 101. The connecting block 102 is a block structure made of insulating material. One end of the connecting block 102 is fixedly connected to the contact rod 6. The other end of the connecting block 102 passes through the clearance groove 101 and extends to the outer periphery of the supporting shell 1.

[0088] The rotating ring 103 has a circular structure and is sleeved on the outer periphery of the supporting shell 1. The inner diameter of the rotating ring 103 is adapted to the outer diameter of the supporting shell 1. The rotating ring 103 can rotate freely around the axis of the supporting shell 1 on the outer periphery of the supporting shell 1. The inner periphery of the rotating ring 103 is fixedly connected to the protruding end of the connecting block 102. When the rotating ring 103 rotates, it drives the contact rod 6 to rotate synchronously through the connecting block 102.

[0089] The clearance groove 101 provides rotational travel space for the connecting block 102. When the connecting block 102 rotates with the contact rod 6, it swings in the clearance groove 101. The width and length of the clearance groove 101 are set according to the rotation angle range of the contact rod 6. When the contact rod 6 rotates to the limit position, the inner wall of the clearance groove 101 contacts the side wall of the connecting block 102, which plays a limiting role and prevents the contact rod 6 from rotating excessively.

[0090] When the locking plate 114 is reset to the top of the rising groove 128, the operator manually rotates the rotating ring 103 to drive the contact rod 6 along the transverse groove 129 to the starting end of the first sink 121, thereby realizing the reset of the equipment.

[0091] Specifically, the side wall of the transverse groove 129 is provided with a limiting component 1212. The limiting component 1212 includes an inner recess 12121 formed in the side wall of the transverse groove 129. An inner recess spring 12122 is provided inside the inner recess 12121. A limiting plate 12123 is provided at one end of the inner recess spring 12122. The limiting plate 12123 is inclined on the side facing the rising groove 128.

[0092] When the locking plate 114 enters the transverse groove 129 from the rising groove 128, the locking plate 114 slides upward along the rising groove 128 to the entrance of the transverse groove 129. The edge of the locking plate 114 first contacts the inclined surface of the limiting plate 12123. As the locking plate 114 continues to move upward, it pushes the inclined surface of the limiting plate 12123, causing the limiting plate 12123 to overcome the elastic force of the inner spring 12122 and retract into the inner groove 12121. The locking plate 114 smoothly passes through the limiting plate 12123 and enters the transverse groove 129. After the locking plate 114 passes through, the inner spring 12122 pushes the limiting plate 12123 to extend back into the transverse groove 129. The limiting plate 12123 forms a one-way blocking effect on the locking plate 114. After the locking plate 114 enters the transverse groove 129, it cannot retract back to the rising groove 128 on its own, ensuring that the locking plate 114 remains stably inside the first sinking groove 121 after the reset operation is completed.

[0093] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A power distribution network fault self-healing switch, characterized by: The device includes a supporting shell (1), a fixed plate (2) fixedly installed inside the shell, a sliding hole (3) at the center of the fixed plate (2), a top rod (4) slidably installed inside the sliding hole (3), a positioning sleeve (5) rotatably installed on one side of the sliding hole (3), a contact rod (6) at the top of the positioning sleeve (5), conductive interfaces (7) on both sides of the fixed plate (2) located on the contact rod (6), a conductive coil (8) sleeved on one end of the top rod (4), and the top rod (4) slidingly engaging with the conductor coil, one end of the conductive coil (8) being connected to the contact rod (6), a return spring (9) fixedly installed on one end of the top rod (4), an installation groove (10) opened in the positioning sleeve (5) at the position corresponding to the contact rod (6), a self-locking component (11) installed inside the installation groove (10), and a guide groove mechanism (12) at the position corresponding to the self-locking component (11) of the top rod (4).

2. The self-healing switch for power distribution network faults as described in claim 1, characterized in that: The inner side of the fixed disk (2) is provided with an arc extinguishing component (13), including a sliding groove (131) opened inside the fixed disk (2) and located between two conductive interfaces (7). A baffle (132) is slidably arranged inside the sliding groove (131). A retraction spring (133) is opened inside the baffle (132). The retraction spring (133) is fixedly connected to the disk surface of the fixed disk (2). It also includes an arc-shaped push plate (134) fixedly arranged on one side of the contact rod (6). The arc-shaped surface of the arc-shaped push plate (134) faces the baffle (132), and the end of the baffle (132) is arc-shaped.

3. The self-healing switch for power distribution network faults as described in claim 2, characterized in that: The self-locking assembly (11) includes a plug rod (111) disposed inside the mounting groove (10), a support spring (112) disposed inside the plug rod (111), a locking rod (113) disposed at the bottom end of the plug rod (111), and a locking plate (114) disposed at the bottom end of the locking rod (113).

4. The self-healing switch for power distribution network faults as described in claim 3, characterized in that: The guide groove mechanism (12) includes a first sinker (121), which is opened on the outer periphery of the top rod (4) and is set at an angle to the axis of the top rod (4). A second sinker (122) is opened on the outer periphery of the top rod (4). The positions of the second sinker (122) and the first sinker (121) are symmetrical about the axis of the top rod (4). The depth of the second sinker (122) is greater than the depth of the first sinker (121). A connection point (123) is provided at the end of the first sinker (121) and the second sinker (122), and the connection point (123) corresponds to the position of the axis of the top rod (4).

5. The self-healing switch for power distribution network faults as described in claim 4, characterized in that: The guide groove mechanism (12) also includes a stop groove (124). The stop groove (124) is opened on the outer periphery of the top rod (4). The straight direction of the stop groove (124) corresponds to the axis of the top rod (4). The stop groove (124) is connected to the connection point (123) of the first sinking groove (121) and the second sinking groove (122). The bottom surface of the stop groove (124) is lower than the bottom surface of the second sinking groove (122).

6. The self-healing switch for power distribution network faults as described in claim 5, characterized in that: A partition (125) is fixedly installed inside the connection (123). A guide groove (126) is opened inside the partition (125). The guide groove (126) is connected to the stop groove (124). There is a gap (127) between the partition (125) and the second sink (122). The height of the gap (127) is the same as the thickness of the locking plate (114).

7. The self-healing switch for distribution network faults as described in claim 6, characterized in that: The width of the first sinking groove (121) and the second sinking groove (122) is the same as the diameter of the locking plate (114). The width of the stop groove (124) is the same as the diameter of the locking rod (113). A rising groove (128) is provided at the end of the stop groove (124) away from the connection point (123). The rising groove (128) is slidably engaged with the locking plate (114). A transverse groove (129) is provided at the top of the rising groove (128). The transverse groove (129) is connected to the end of the first sinking groove (121) away from the connection point (123).

8. The self-healing switch for distribution network faults as described in claim 7, characterized in that: The bottom end of the rising groove (128) is provided with a reset hole (1210). The reset hole (1210) is provided with a reset assembly (1211). The reset assembly (1211) includes a reset rod (12111) that is slidably disposed inside the reset hole (1210). A toothed plate (12112) is fixedly disposed on one side of the reset rod (12111). A rotating groove (12113) is provided inside the push rod (4) at a position corresponding to the toothed plate (12112). A gear (12114) is rotatably disposed inside the rotating groove (12113). The gear (12114) meshes with the toothed plate (12112). A drive shaft (12115) is fixedly disposed at the center of the gear (12114). One end of the drive shaft (12115) extends out of the push rod (4). A handle turntable (12116) is fixedly disposed at one end of the drive shaft (12115).

9. The self-healing switch for distribution network faults as described in any one of claims 1, 2, 3, 4, 5, 6, 7, or 8, characterized in that: The top of the supporting shell (1) is provided with a relief groove (101), and a connecting block (102) is fixedly installed inside the relief groove (101). A rotating ring (103) is provided on the outer periphery of the supporting shell (1), and the rotating ring (103) is fixedly connected to the contact rod (6) through the connecting block (102).

10. The self-healing switch for power distribution network faults as described in claim 8, characterized in that: The side wall of the transverse groove (129) is provided with a limiting component (1212). The limiting component (1212) includes an inner recess (12121) opened on the side wall of the transverse groove (129). An inner recess spring (12122) is provided inside the inner recess spring (12122). A limiting plate (12123) is provided at one end of the inner recess spring (12122). The limiting plate (12123) is inclined on the side facing the rising groove (128).

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