Insulation pull rod, pole and pole-mounted circuit breaker

Abstract

The embodiment of the utility model provides an insulating pull rod, a pole and a pole-mounted circuit breaker. The insulating pull rod comprises a pull rod body and a switching assembly. The switching assembly comprises a first connecting rod, a second connecting rod and a switching part, the first connecting rod is located between the pull rod body and the second connecting rod, the switching part is rotationally connected with the ends, close to each other, of the first connecting rod and the second connecting rod, the other end of the first connecting rod is connected with the pull rod body, and the second connecting rod is located between the first connecting rod and the second connecting rod. The other end of the second connecting rod is used for being connected with a mechanism box. The insulating pull rod provided by the embodiment of the utility model is convenient to install and operate.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power equipment, in particular to an insulating pull rod, a pole column and a pole-mounted circuit breaker. BACKGROUND

[0002] In the related art, the pole column of the pole-mounted circuit breaker mainly includes an incoming line end, an outgoing line end, an arc extinguishing chamber and an insulating pull rod. In the normal case of the distribution network line, the incoming line end, the arc extinguishing chamber and the outgoing line end form a passage. When it is detected that an abnormality occurs in the distribution network line, the mechanism box below the insulating pull rod pulls down the insulating pull rod, so that the insulating pull rod pulls down the movable contact in the arc extinguishing chamber, and the arc extinguishing chamber is disconnected, thereby disconnecting the above-mentioned passage and achieving the effect of isolating the fault.

[0003] However, in the related art, one end of the insulating pull rod needs to be connected with the arc extinguishing chamber in the pole column, and the other end needs to be connected with the mechanism box. However, due to the large weight of other structures of the pole column and the mechanism box, and the high precision requirement for the relative positions between the insulating pull rod and the arc extinguishing chamber and the mechanism box, when it is necessary to simultaneously connect the two ends of the insulating pull rod with the mechanism box and the arc extinguishing chamber, the installation operation of the insulating pull rod in the related art is very troublesome, which seriously affects the assembly progress. CONTENT OF THE UTILITY MODEL

[0004] Therefore, the main purpose of the embodiments of the present application is to provide an insulating pull rod, a pole column and a pole-mounted circuit breaker which are convenient to install.

[0005] To achieve the above-mentioned purpose, the technical scheme of the embodiments of the present application is as follows:

[0006] The first aspect of the embodiments of the present application provides an insulating pull rod, comprising:

[0007] a pull rod body, the pull rod body being used for being connected with an arc extinguishing chamber;

[0008] an adapter assembly, the adapter assembly comprising a first connecting rod, a second connecting rod and an adapter part, the first connecting rod being located between the pull rod body and the second connecting rod, the adapter part being rotatably connected with one end of the first connecting rod and the second connecting rod which are close to each other, the other end of the first connecting rod being connected with the pull rod body, and the other end of the second connecting rod being used for being connected with a mechanism box.

[0009] In an embodiment, the adapter part is an adapter sleeve with a threaded cavity, and the opposite ends of the adapter sleeve are threadedly connected with one end of the first connecting rod and the second connecting rod which are close to each other.

[0010] In one embodiment, the first connecting rod is movably connected with the pull rod body, and the adapter assembly further comprises a locking nut rotatably arranged on the first connecting rod and located between the pull rod body and the adapter portion, the locking nut is abutted with the pull rod body by rotating to limit the movement of the first connecting rod relative to the pull rod body.

[0011] In one embodiment, the pull rod body comprises a main body portion, an elastic member and an adjusting guide sleeve, the adjusting guide sleeve is sleeved on one end of the main body portion close to the first connecting rod, one end of the adjusting guide sleeve away from the main body portion is connected with the first connecting rod, a limiting step is formed on the radial outer surface of the main body portion, and opposite ends of the elastic member are respectively abutted with the limiting step and the adjusting guide sleeve.

[0012] In one embodiment, the elastic member is formed on the outer circumferential surface of the insulating pull rod.

[0013] In one embodiment, the arc extinguishing chamber is installed in the pole post shell, when the pull rod body is connected with the arc extinguishing chamber, one end of the main body portion away from the elastic member is connected with the arc extinguishing chamber, the elastic member is located in the pole post shell between the connection of the main body portion and the arc extinguishing chamber and the limiting step, the extension length of the main body portion is greater than or equal to 190 mm and less than or equal to 230 mm.

[0014] In one embodiment, one end of the main body portion connected with the adjusting guide sleeve has a first connecting hole, the adjusting guide sleeve has a second connecting hole in communication with the first connecting hole, and the pull rod body comprises an adjusting guide pin penetrating through the first connecting hole and the second connecting hole.

[0015] In one embodiment, the opening size of the first connecting hole is different from the opening size of the second connecting hole along the extension direction of the insulating pull rod.

[0016] In one embodiment, the opening size of the first connecting hole is greater than the opening size of the second connecting hole along the extension direction of the insulating pull rod, and the first connecting hole is a waist-shaped hole; and / or,

[0017] In one embodiment, the opening size of the second connecting hole is greater than the opening size of the first connecting hole along the extension direction of the insulating pull rod, and the second connecting hole is a waist-shaped hole.

[0018] In one implementation, the adjusting guide sleeve has a first sleeve accommodating cavity and a second sleeve accommodating cavity separated by a partition, the main body part is arranged in the first sleeve accommodating cavity near one end of the first connecting rod, the first connecting rod is arranged in the second sleeve accommodating cavity near one end of the main body part, and the first connecting rod is threadedly connected with the cavity wall of the second sleeve accommodating cavity; and / or,

[0019] The elastic member is an overtravel spring sleeved on the main body part.

[0020] The second aspect of the embodiment of the present application provides an electrode post, comprising:

[0021] An arc-extinguishing chamber;

[0022] The insulating pull rod body is connected with the arc-extinguishing chamber.

[0023] The third aspect of the embodiment of the present application provides a pole-mounted circuit breaker, comprising:

[0024] A mechanism box;

[0025] The second connecting rod is connected with the mechanism box.

[0026] The embodiment of the present application provides an insulating pull rod, an electrode post and a pole-mounted circuit breaker. The insulating pull rod comprises a pull rod body and an adapter assembly. The adapter assembly comprises a first connecting rod, a second connecting rod and an adapter part. The first connecting rod is located between the pull rod body and the second connecting rod. The adapter part is rotationally connected with one end of the first connecting rod and one end of the second connecting rod respectively. The other end of the first connecting rod is connected with the pull rod body. The other end of the second connecting rod is used for connecting with the mechanism box. On the one hand, by arranging the adapter part to be rotationally connected with the first connecting rod and the second connecting rod respectively, the first connecting rod and the second connecting rod can be connected as a whole by rotating the adapter part, and then the insulating pull rod can be connected with the arc-extinguishing chamber and the mechanism box respectively. The installation operation is convenient, and the assembly progress can be accelerated. On the other hand, since the first connecting rod and the second connecting rod are both rotationally connected with the adapter part instead of being fixedly connected, the relative position between the first connecting rod and the second connecting rod can be adjusted by rotating the adapter part. The high-precision requirement for the position between the arc-extinguishing chamber, the insulating pull rod and the mechanism box can be met. The adaptability of the insulating pull rod can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 FIG. 1 is a structural schematic diagram of an insulating pull rod according to an embodiment of the present application;

[0028] Figure 2 FIG. 2 is a structural schematic diagram of an electrode post according to an embodiment of the present application; Figure 1 FIG. 3 is a partial structural schematic diagram of a main body part in the electrode post of FIG. 2;

[0029] Figure 3 FIG. 4 is a structural schematic diagram of a pole-mounted circuit breaker according to an embodiment of the present application;Figure 1 A magnified view of a section at point A in the middle;

[0030] Figure 4 for Figure 1 A structural schematic diagram of the intermediate connector assembly from another perspective; the locking nut is not shown in the figure.

[0031] Figure 5 for Figure 2 A magnified view of a section at point B in the middle;

[0032] Figure 6 for Figure 1 Schematic diagram of the structure of the middle spring seat;

[0033] Figure 7 for Figure 1 Schematic diagram of the structure of the adjusting guide sleeve;

[0034] Figure 8 for Figure 7 Cross-sectional view of the adjusting guide sleeve;

[0035] Figure 9 for Figure 7 A structural schematic diagram of the middle adjusting guide sleeve from another perspective.

[0036] Explanation of reference numerals in the attached figures

[0037] 10. Pull rod body; 11. Main body; 11a. First connecting hole; 11b. Limiting step; 111. Main rod; 112. Spring seat; 12. Elastic element; 13. Adjusting guide sleeve; 13a. Second connecting hole; 13b. First sleeve cavity; 13c. Second sleeve cavity; 20. Adapter assembly; 21. First connecting rod; 22. Second connecting rod; 23. Adapter part; 24. Locking nut. Detailed Implementation

[0038] In this application, the orientation or positional relationship of the "extension direction" is based on the appendix. Figure 1 The orientation or positional relationship shown is for illustrative purposes only and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application.

[0039] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of this application, and are therefore only examples, and should not be used to limit the scope of protection of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0040] In the description of the embodiments of the present application, the technical terms "first", "second", "third" and the like are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is two and more than two, unless otherwise explicitly and specifically limited.

[0041] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearance of the phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily independent or alternative embodiments to each other. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0042] An embodiment of the present application provides an insulating pull rod, please refer to Figure 1 、 Figure 3 and Figure 4 , the insulating pull rod comprises a pull rod body 10 and an adapter assembly 20.

[0043] The pull rod body 10 is used to be connected with an arc extinguishing chamber.

[0044] The adapter assembly 20 comprises a first connecting rod 21, a second connecting rod 22 and an adapter 23. The first connecting rod 21 is located between the pull rod body 10 and the second connecting rod 22. The adapter 23 is rotatably connected with one end of the first connecting rod 21 and the second connecting rod 22 which are close to each other. The other end of the first connecting rod 21 is connected with the pull rod body 10. The other end of the second connecting rod 22 is used to be connected with a mechanism box.

[0045] Another embodiment of the present application provides a pole, which comprises an arc extinguishing chamber and the insulating pull rod of any of the embodiments of the present application. The pull rod body 10 is connected with the arc extinguishing chamber.

[0046] Still another embodiment of the present application provides a pole-mounted circuit breaker, which comprises a mechanism box and the pole of any of the embodiments of the present application. The second connecting rod 22 is connected with the mechanism box.

[0047] Specifically, one end of the pull rod body 10 is used to be connected with the arc extinguishing chamber, and the other end is connected with one end of the first connecting rod 21 which is away from the second connecting rod 22. The first connecting rod 21 and the second connecting rod 22 are connected through the adapter 23 at the end which are close to each other. The other end of the second connecting rod 22 which is away from the first connecting rod 21 is connected with the mechanism box.

[0048] Thus, when the abnormality of the wiring line is detected, the second connecting rod 22 is pulled by the mechanism box, which can drive the first connecting rod 21 and the pull rod body 10, and further pull the movable contact of the arc extinguishing chamber, so that the arc extinguishing chamber is disconnected.

[0049] The connection mode between the first connecting rod 21 and the pull rod body 10 is not limited, and can be fixed connection modes such as clamping and fastening connection, or can be movable connection modes such as threaded connection and sliding connection.

[0050] The connection mode of the pull rod body 10 and the arc extinguishing chamber, and the connection mode of the second connecting rod 22 and the mechanism box can also be set according to actual conditions. For example, the pull rod body 10 is threadedly connected with the arc extinguishing chamber. For another example, the second connecting rod 22 is threadedly connected with the mechanism box.

[0051] The adapter 23 is a structure that is rotatably connected with the first connecting rod 21 and the second connecting rod 22, and is rotatably connected with the first connecting rod 21 and the second connecting rod 22 respectively, so as to achieve the purpose of connecting the first connecting rod 21 and the second connecting rod 22 together.

[0052] It should be noted that the first connecting rod 21 and the adapter 23 can be detachably connected, or can be non-detachably connected. Moreover, the second connecting rod 22 and the adapter 23 can be detachably connected, or can be non-detachably connected.

[0053] The specific structure of the rotating part can be set according to actual conditions.

[0054] For example, the adapter 23 is an adapter sleeve with a threaded cavity, and the opposite ends of the adapter sleeve are threadedly connected with the ends of the first connecting rod 21 and the second connecting rod 22 that are close to each other, respectively. That is, one end of the adapter 23 is threadedly connected with the first connecting rod 21, and the other end is threadedly connected with the second connecting rod 22, so that the three can be conveniently disassembled, and the convenience of disassembly can be further improved.

[0055] In the insulating pull rod, the adapter assembly 20 comprises a first connecting rod 21, a second connecting rod 22 and an adapter 23. The first connecting rod 21 is located between the pull rod body 10 and the second connecting rod 22. The adapter 23 is rotationally connected to the first connecting rod 21 and the second connecting rod 22, respectively. One end of the first connecting rod 21 is connected to the pull rod body 10. The other end of the second connecting rod 22 is used to be connected to the mechanism box. On the one hand, the adapter 23 is rotationally connected to the first connecting rod 21 and the second connecting rod 22, respectively. The first connecting rod 21 and the second connecting rod 22 can be connected as a whole by rotating the adapter 23. The insulating pull rod can be connected to the arc-extinguishing chamber and the mechanism box, respectively. The installation operation is convenient, and the assembly progress can be accelerated. On the other hand, the first connecting rod 21 and the second connecting rod 22 are rotationally connected to the adapter 23, rather than fixedly connected. The relative position between the first connecting rod 21 and the second connecting rod 22 can be adjusted by rotating the adapter 23. The high-precision requirement for the position between the arc-extinguishing chamber, the insulating pull rod and the mechanism box can be met. The adaptability of the insulating pull rod can be improved.

[0056] In an embodiment, please refer to Figure 3 The first connecting rod 21 is movably connected to the pull rod body 10. The adapter assembly 20 further comprises a locking nut 24. The locking nut 24 is rotationally arranged on the first connecting rod 21 and located between the pull rod body 10 and the adapter 23. The locking nut 24 is abutted against the pull rod body 10 by rotating, so as to limit the movement of the first connecting rod 21 relative to the pull rod body 10. In this way, the installation stability of the first connecting rod 21 on the pull rod body 10 can be improved.

[0057] Specifically, the first connecting rod 21 is connected to the pull rod body 10 and movable relative to the pull rod body 10. The specific movable connection manner is not limited, for example, the first connecting rod 21 is threadedly connected or slidably connected to the pull rod body 10.

[0058] The locking nut 24 is sleeved on the first connecting rod 21. When the first connecting rod 21 is moved to a set position relative to the pull rod body 10, the locking nut 24 is abutted against the end surface of the pull rod body 10 by rotating, so as to limit the movement of the first connecting rod 21.

[0059] In an embodiment, please refer to Figure 1The pull rod body 10 comprises a main body 11, an elastic member 12 and an adjusting guide sleeve 13. The adjusting guide sleeve 13 is sleeved on the main body 11 near one end of the first connecting rod 21. One end of the adjusting guide sleeve 13 away from the main body 11 is connected with the first connecting rod 21. The outer surface of the main body 11 in the radial direction forms a limiting step 11b. The opposite ends of the elastic member 12 are respectively abutted with the limiting step 11b and the adjusting guide sleeve 13. Thus, by arranging the elastic member 12, the main body 11 and the adjusting guide sleeve 13 have a certain relative activity, which can reduce the manufacturing precision requirement of the pull rod body 10 and improve the applicability of the insulating pull rod.

[0060] Specifically, one end of the adjusting guide sleeve 13 is sleeved on the main body 11, and the other end is connected with the first connecting rod 21.

[0061] Part of the outer surface of the main body 11 is relatively protruded, thereby forming the limiting step 11b. The elastic member 12 is arranged between the limiting step 11b and the adjusting guide sleeve 13. One end of the elastic member 12 is abutted with the step surface of the limiting step 11b, and the other end is abutted with the end surface of the adjusting guide sleeve 13. Thus, the main body 11 and the adjusting guide sleeve 13 have a certain elastic force.

[0062] It should be noted that the specific implementation manner of the main body 11 forming the limiting step 11b is not limited.

[0063] For example, the main body 11 comprises a main rod 111 and a connecting rod. The diameter of the main rod 111 is greater than that of the connecting rod. The connecting rod is arranged at one end of the main rod 111 near the adjusting guide sleeve 13 and is clamped with the main rod 111 to jointly form the limiting step 11b. The adjusting guide sleeve 13 is sleeved on the connecting rod.

[0064] For another example, referring to Figure 1 and Figure 6 The elastic member 12 is an overtravel spring. The main body 11 comprises a main rod 111 and a spring seat 112. The spring seat 112 is located at one end of the main rod 111 near the adjusting guide sleeve 13. The main rod 111 and the spring seat 112 are integrally formed to jointly form the limiting step 11b with the main rod 111. The overtravel spring is abutted on the end surface of the spring seat 112.

[0065] The specific type of the elastic member 12 can be set according to actual conditions.

[0066] For example, the elastic member 12 is an overtravel spring sleeved on the main body 11. Thus, the elastic member 12 can be more stably installed on the main body 11 while improving the elastic force.

[0067] In one embodiment, the elastic member 12 is formed on the outer circumferential surface of the insulating pull rod. That is, the elastic member 12 is not a structure installed inside the insulating pull rod, but a structure exposed outside.

[0068] In fact, the insulating pull rod in the related art includes a shell with a cavity inside, and the elastic member is arranged in the cavity, which results in a large diameter of the insulating pull rod, which is not conducive to installation into the pole shell. In the embodiment, the elastic member 12 is formed on the outer circumferential surface of the insulating pull rod, which does not need to embed the elastic member 12 inside the main body 11, does not need to increase the volume of the main body 11 for installing the elastic member 12, and does not need to additionally arrange a shell structure for accommodating the elastic member 12, thereby reducing the diameter of the insulating pull rod.

[0069] In one embodiment, the arc-extinguishing chamber is installed in the pole shell, when the pull rod body 10 is connected with the arc-extinguishing chamber, the end of the main body 11 away from the elastic member 12 is connected with the arc-extinguishing chamber, the elastic member 12 is located in the pole shell, between the connection of the main body 11 and the arc-extinguishing chamber and the limiting step 11b, the extension length of the main body 11 is greater than or equal to 190 mm and less than or equal to 230 mm.

[0070] The specific size of the extension length of the main body 11 between the connection of the main body 11 and the arc-extinguishing chamber and the limiting step 11b can be set according to actual conditions.

[0071] For example, the first length is greater than or equal to 190 mm and less than or equal to 230 mm. For example, 190 mm, 210 mm or 230 mm.

[0072] By controlling the extension length of the main body 11 in the range of 190 mm to 230 mm, the insulating pull rod can have a larger insulating length, which can reduce the risk of breakdown between the elastic member 12 and the arc-extinguishing chamber due to the exposure of the elastic member 12, and also will not make the insulating pull rod too long.

[0073] In one embodiment, please refer to Figure 2 , Figure 5 and Figure 8 , the end of the main body 11 connected with the adjusting guide sleeve 13 has a first connecting hole 11a, the adjusting guide sleeve 13 has a second connecting hole 13a corresponding to the first connecting hole 11a, and the pull rod body 10 includes an adjusting guide pin passing through the first connecting hole 11a and the second connecting hole 13a.

[0074] The opening size of the first connecting hole 11a is different from the opening size of the second connecting hole 13a along the extension direction of the insulating pull rod.

[0075] In one aspect, by adjusting the guide pin connecting body part 11 and the adjusting guide sleeve 13, the connection stability between the body part 11 and the adjusting guide sleeve 13 can be improved. On the other hand, since the opening sizes of the first connecting hole 11a and the second connecting hole 13a along the extension direction of the insulating pull rod are not the same, and since the elastic member 12 is arranged between the body part 11 and the adjusting guide sleeve 13, the relative position between the body part 11 and the adjusting guide sleeve 13 can be finely adjusted, and the connection stability of the two is good.

[0076] It should be noted that the opening size of the first connecting hole 11a can be larger than the opening size of the second connecting hole 13a. The opening size of the second connecting hole 13a can also be larger than the opening size of the first connecting hole 11a.

[0077] For example, along the extension direction of the insulating pull rod, the opening size of the first connecting hole 11a is larger than the opening size of the second connecting hole 13a, and the first connecting hole 11a is a waist-shaped hole.

[0078] For another example, along the extension direction of the insulating pull rod, the opening size of the second connecting hole 13a is larger than the opening size of the first connecting hole 11a, and the second connecting hole 13a is a waist-shaped hole.

[0079] By making the connecting hole with a larger opening size among the first connecting hole 11a and the second connecting hole 13a a waist-shaped hole, the processing and manufacturing thereof can be facilitated, and the adjusting guide pin can also be used to fix the body part 11 and the adjusting guide sleeve 13.

[0080] In one embodiment, referring to Figures 7 to 9 The adjusting guide sleeve 13 has a first sleeve cavity 13b and a second sleeve cavity 13c separated by a partition, and the body part 11 is arranged in the first sleeve cavity 13b near one end of the first connecting rod 21. The first connecting rod 21 is arranged in the second sleeve cavity 13c near one end of the body part 11, and the first connecting rod 21 is threadedly connected with the cavity wall of the second sleeve cavity 13c. In this way, the body part 11 and the first connecting rod 21 can be connected conveniently.

[0081] Specifically, the first sleeve cavity 13b is used to connect with the body part 11, and the second sleeve cavity 13c is used to connect with the first connecting rod 21.

[0082] It should be noted that since the first sleeve cavity 13b and the second sleeve cavity 13c are separated, they can have the same opening size or different opening sizes.

[0083] In the description of the application, the description of the terms "in an embodiment", "in some embodiments", "in a specific embodiment", or "exemplary" and the like means that the specific feature, structure, material or characteristic being described is included in at least one embodiment or example of the application. The illustrative appearance of the above-mentioned terms in various places in the specification is not necessarily intended to refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics can be combined in any suitable manner in one or more embodiments or examples. Furthermore, the different embodiments or examples described in the application and the features of the different embodiments or examples can be combined with each other, if not mutually exclusive.

[0084] The above only describes the preferred embodiments of the application and is not intended to limit the application. The application can have various modifications and changes for those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the application is included in the protection scope of the application.

Claims

1. An insulated pull rod characterized in that, The application relates to a connecting device for an arc extinguishing chamber. The connecting device comprises a connecting rod body, a first connecting rod, a second connecting rod and an adapter, the first connecting rod is located between the connecting rod body and the second connecting rod, the adapter is rotationally connected to one end of the first connecting rod and one end of the second connecting rod respectively, the other end of the first connecting rod is connected to the connecting rod body, and the other end of the second connecting rod is used for being connected to a mechanism box. The adapter is an adapter sleeve with a threaded cavity, and the other ends of the adapter sleeve are threadedly connected to the one ends of the first connecting rod and the second connecting rod respectively.

2. The insulated pull rod of claim 1, wherein, The first connecting rod is movably connected to the connecting rod body, the adapter further comprises a locking nut, the locking nut is rotationally arranged on the first connecting rod and located between the connecting rod body and the adapter, and the locking nut is used for being abutted against the connecting rod body by rotation so as to limit the movement of the first connecting rod relative to the connecting rod body.

3. An insulated pull rod according to claim 1 or 2, characterized in that The connecting rod body comprises a main body, an elastic member and an adjusting guide sleeve, the adjusting guide sleeve is sleeved on one end of the main body close to the first connecting rod, the other end of the adjusting guide sleeve away from the main body is connected to the first connecting rod, a limiting step is formed on the radial outer surface of the main body, and the opposite ends of the elastic member are abutted against the limiting step and the adjusting guide sleeve respectively.

4. The insulated pull rod according to claim 1 or 2, characterized in that The elastic member is formed on the outer circumferential surface of the insulating connecting rod.

5. The insulated pull rod of claim 4, wherein, The arc extinguishing chamber is mounted in a pole shell, when the connecting rod body is connected to the arc extinguishing chamber, one end of the main body away from the elastic member is connected to the arc extinguishing chamber, the elastic member is located in the pole shell between the connecting position of the main body and the arc extinguishing chamber and the limiting step, the extension length of the main body is greater than or equal to 190 mm and less than or equal to 230 mm.

6. The insulated pull rod of claim 5, wherein, One end of the main body connected to the adjusting guide sleeve is provided with a first connecting hole, the adjusting guide sleeve is provided with a second connecting hole in communication with the first connecting hole, and the connecting rod body comprises an adjusting guide pin arranged in the first connecting hole and the second connecting hole.

7. The insulated pull rod of claim 4, wherein, The opening size of the first connecting hole is different from the opening size of the second connecting hole along the extension direction of the insulating connecting rod. The opening size of the first connecting hole is greater than the opening size of the second connecting hole along the extension direction of the insulating connecting rod, and the first connecting hole is a waist-shaped hole; and / or 8. The insulated pull rod of claim 7, wherein, The opening size of the second connecting hole is greater than the opening size of the first connecting hole along the extension direction of the insulating connecting rod, and the second connecting hole is a waist-shaped hole. The adjusting guide sleeve is provided with a first sleeve cavity and a second sleeve cavity which are separated from each other, one end of the main body close to the first connecting rod is arranged in the first sleeve cavity, one end of the first connecting rod close to the main body is arranged in the second sleeve cavity, and the first connecting rod is threadedly connected to the cavity wall of the second sleeve cavity; and / or 9. The insulated pull rod of claim 4, wherein, The elastic member is an over-travel spring sleeved on the main body. The application further relates to an arc extinguishing device.

10. A pole, characterized in that The arc extinguishing device comprises an arc extinguishing chamber. ​ The insulated pull rod of any one of claims 1-9, wherein the pull rod body is connected to the arc chute.

11. A pole-mounted circuit breaker, characterized by Comprising: a mechanism box; The pole column of claim 10, wherein the second connecting rod is connected to the mechanism box.

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