Device and method for simulating tensile test of composite insulator under icing condition

Abstract

The invention relates to the technical field of composite insulators, in particular to a composite insulator tensile test device and method under the simulated icing condition, and the device comprises a tensile assembly which comprises a moving part, a tensile part and a control part, the tensile part is arranged on the moving part, and the control part is arranged on the moving part; the adjusting assembly comprises an opening and closing piece, a temperature control piece and a pouring piece, the opening and closing piece is arranged on the moving piece, the temperature control piece is arranged on the opening and closing piece, the pouring piece is arranged on the opening and closing piece, liquid nitrogen is used for cooling and icing through the interaction between the stretching assembly and the adjusting assembly, and the precise temperature control function of ice is achieved. By accurately controlling the injection of liquid nitrogen and the release of volatile gas and adjusting the temperature, the experimental conditions of stretching the composite insulator at different temperatures under the icing condition can be realized, and the test accuracy is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of composite insulators, and in particular to a composite insulator tensile testing device and method under simulated icing conditions. Background Art

[0002] Composite insulators are widely used as external insulation devices in power transmission systems because of their excellent pollution flashover resistance, small size, and high strength. Composite insulators play the role of suspending and supporting conductors and have certain strength, tensile and compressive properties. Insulators that do not meet the performance standards are prone to deformation or even breakage during use, causing accidents, so it is necessary to test the mechanical properties of insulators.

[0003] Severe icing can greatly weaken the mechanical properties of composite insulators, and even cause them to overstretch and break, resulting in large-scale power outages in the power system. Under icing conditions, whether the mechanical properties of composite insulators can meet engineering applications is still a problem in China. Summary of the invention

[0004] In view of the problem that the inspection of the above-mentioned existing overhead lines is often difficult to implement by relying on traditional visual inspection methods, the present invention is proposed.

[0005] Therefore, an object of the present invention is to provide a composite insulator tensile testing device and method under simulated icing conditions.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a composite insulator tensile test device under simulated icing conditions, comprising:

[0007] A stretching assembly, comprising a moving part, a stretching part and a control part, wherein the stretching part is arranged on the moving part, and the control part is arranged on the moving part; and

[0008] The regulating component comprises an opening and closing part, a temperature control part and a filling part, wherein the opening and closing part is arranged on the moving part, the temperature control part is arranged on the opening and closing part, and the filling part is arranged on the opening and closing part.

[0009] As a preferred solution of a composite insulator tensile testing device under simulated icing conditions of the present invention, the moving part includes a base, a servo motor is arranged on the base, a screw is arranged on the servo motor, a crossbeam is arranged on the screw, and a guide rod is arranged on the crossbeam.

[0010] As a preferred solution of a composite insulator tensile testing device under simulated icing conditions of the present invention, the tensile member includes an upper clamp, the upper clamp is arranged on the beam, the lower clamp is arranged on the base, the fixing seat is arranged on the lower clamp, and the low-temperature sealing gasket is arranged on the fixing seat.

[0011] As a preferred solution of the composite insulator tensile testing device under simulated icing conditions of the present invention, the tensile member also includes a tensile sensor, the tensile sensor is arranged on the beam, the signal amplifier is arranged on the tensile sensor, and the signal converter is arranged on the signal amplifier.

[0012] As a preferred solution of a composite insulator tensile testing device under simulated icing conditions of the present invention, the control component includes a servo drive controller, the servo drive controller is arranged on the servo motor, the feedback controller is arranged on the servo drive controller, the terminal processor is arranged on the feedback controller, and the wire protection cover is arranged on the base.

[0013] As a preferred solution of a composite insulator tensile testing device under simulated icing conditions of the present invention, the opening and closing member includes a support frame, the support frame is arranged on the base, the drive motor is arranged on the support frame, the drive rod is arranged on the drive motor, and the motor drive controller is arranged on the drive motor.

[0014] As a preferred solution of a composite insulator tensile testing device under simulated icing conditions of the present invention, the opening and closing member further includes a fixed block, the fixed block is arranged on the driving rod, the icing groove is arranged on the fixed block, and the low-temperature sealing gasket is arranged on the icing groove.

[0015] As a preferred solution of a composite insulator tensile testing device under simulated icing conditions of the present invention, the temperature control component includes a heating layer, the heating layer is arranged on the icing groove, the temperature sensor is arranged on the heating layer, and the temperature controller is arranged on the temperature sensor.

[0016] As a preferred solution of a composite insulator tensile testing device under simulated icing conditions of the present invention, the filling piece includes a liquid injection pipe, the liquid injection pipe is arranged on the ice-coating groove, the exhaust valve is arranged on the ice-coating groove, the pressure gauge is arranged on the liquid injection pipe, the pressure regulating valve is arranged on the liquid injection pipe, the liquid nitrogen tank is arranged on the pressure regulating valve, and the liquid nitrogen delivery valve is arranged on the liquid nitrogen tank.

[0017] A composite insulator tensile test method under simulated icing conditions, comprising the composite insulator tensile test device under simulated icing conditions, comprising the following steps:

[0018] First install the insulator to the test position;

[0019] By adjusting the temperature of the insulator;

[0020] Then conduct a tensile test by starting the device;

[0021] Finally, the tensile data at different temperatures were collected and analyzed.

[0022] The beneficial effects of the present invention are as follows: through the interaction between the stretching assembly and the adjusting assembly, the entire device can complete the simulated experimental test of the insulator, and the present invention uses liquid nitrogen for cooling and icing. The entire cooling device has a simple structure and is easy to operate, which greatly reduces the cooling cost; the installed heating layer and temperature sensor work together to achieve the precise temperature control function of ice. By changing the temperature change, the experimental conditions for the stretching of composite insulators under icing conditions and at different temperatures can be achieved; by changing the size of the lower clamp fixing seat, the low-temperature sealing gasket and the liquid nitrogen opening and closing groove, the experimental conditions for the stretching of composite insulators under different icing thickness conditions can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 The present invention is a schematic diagram of the overall structure of a composite insulator tensile testing device and method under simulated icing conditions.

[0025] Figure 2 The present invention is a partial structural schematic diagram of a composite insulator tensile testing device and method under simulated icing conditions. DETAILED DESCRIPTION

[0026] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0027] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0028] 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 term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments.

[0029] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0030] Example 1

[0031] Reference Figure 1 , which is the first embodiment of the present invention, provides a composite insulator tensile test device under simulated icing conditions, the device includes a tensile assembly 100, including a moving part 101, a tensile member 102 and a control member 103, the tensile member 102 is arranged on the moving part 101, and the control member 103 is arranged on the moving part 101. The installation and stretching of the insulator can be completed through the interaction between the moving part 101, the tensile member 102 and the control member 103, so as to ensure that the simulation experiment of the insulator can be completed.

[0032] Specifically, the moving part 101 includes a base 101a, which is the place where the entire device is carried and is the basis for experimental operations. The servo motor 101b is arranged on the base 101a. There are two servo motors 101b, which are respectively fixedly connected in the internal space of the base 101a. The lead screw 101c is arranged on the servo motor 101b. There are two lead screws 101c, which are fixedly connected to the servo motor 101b and extend upward from the inside of the base 101a, so that the drive of the servo motor 101b can make the lead screw 101c move. The rod 101c rotates, the beam 101d is arranged on the screw 101c, the beam 101d is rotatably connected to the screw 101c, the beam 101d is arranged between the two screws 101c, the guide rod 101e is arranged on the beam 101d, there are two guide rods 101e, the beam 101d is movably connected to the guide rod 101e, the guide rod 101e and the screw 101c are respectively fixed on the base 101a to realize the support of the beam 101d, so that when the servo motor 101b is driven, the beam 101d on the screw 101c moves up and down along the guide rod 101e.

[0033] Further, the stretching member 102 includes an upper clamp 102a, which is arranged on the crossbeam 101d, and the upper clamp 102a is fixedly connected to the bottom of the crossbeam 101d and connected to the upper end of the composite insulator, and is located in the middle position, so that it is easy to bear the force evenly in the future. The lower clamp 102b is arranged on the base 101a, and the lower clamp 102b is fixed on the base 101a, and the position and the upper clamp 102a are on a horizontal line, and are used to connect the lower end of the composite insulator. The upper clamp 102a and the lower clamp 102b can make The insulator is installed on the base 101a. The upper clamp 102a and the lower clamp 102b can be detachable buckles, which is convenient for installing the insulator. The fixing seat 102c is set on the lower clamp 102b, and the fixing seat 102c is fixedly connected to the lower clamp 102b, so that the insulator can be isolated from the influence of the start of the servo motor 101b in the base 101a during the test. The low-temperature sealing gasket 102d is set on the fixing seat 102c, and the fixing seat 102c is installed with the low-temperature sealing gasket 102d to achieve sealing of the object;

[0034] Among them, the tensile member 102 also includes a tension sensor 102e, the tension sensor 102e is arranged on the beam 101d, the signal amplifier 102f is arranged on the tension sensor 102e, the signal converter 102g is arranged on the signal amplifier 102f, the tension sensor 102e is installed on the top of the beam 101d, the sensor end is connected to the signal amplifier 102f, and is connected to the signal converter 102g to realize the conversion of the tension signal into a digital signal.

[0035] Furthermore, the control element 103 includes a servo drive controller 103a, which is arranged on the servo motor 101b, and is used to control the driving of the two servo motors 101b, a feedback controller 103b is arranged on the servo drive controller 103a, and the feedback controller 103b is connected to the servo drive controller 103a, and a terminal processor 103c is arranged on the feedback controller 103b, and the terminal processor 103c is connected to the feedback controller 103b, and is fed back to the terminal processor through the feedback controller 103b. The processor 103c provides detailed information, completes the regulation of the servo motor 101b, and controls the cross-operation of each system to realize the simulation of the tensile test conditions of the composite insulator under icing conditions. The wire protection cover 103d is set on the base 101a, and the wire protection cover 103d penetrates the base 101a, so that the base 101a can pull out the wire. The wire of the servo motor 101b is connected to the servo drive controller 103a and the feedback controller 103b through the wire protection cover 103d, and the speed of the servo motor 101b is regulated by the servo drive controller 103a.

[0036] During the operation, the servo drive controller 103a is first controlled by the terminal processor 103c to start the servo motor 101b, so as to adjust the different heights of the beam 101d and install insulators of different heights. The upper clamp 102a on the beam 101d and the lower clamp 102b on the fixed seat 102c enable the insulator to be installed before the test. Then, the servo motor 101b can be started to rotate to move the beam 101d up and down to stretch the insulator. At this time, the tension sensor 102e is matched with the signal amplifier 102f and the signal converter 102g so that the stretching data can be collected and transmitted to the terminal processor 103c through the feedback controller 103b to realize the experimental conditions of composite insulator stretching under icing conditions.

[0037] Example 2

[0038] Reference Figure 1 - Figure 2 , which is the second embodiment of the present invention. This embodiment is different from the first embodiment in that: this device includes an adjustment component 200, including an opening and closing piece 201, a temperature control piece 202 and a pouring piece 203. The opening and closing piece 201 is arranged on the moving piece 101, the temperature control piece 202 is arranged on the opening and closing piece 201, and the pouring piece 203 is arranged on the opening and closing piece 201. Through the interaction between the opening and closing piece 201, the temperature control piece 202 and the pouring piece 203, the entire device can complete the tensile test of the composite insulator under simulated icing conditions, and can also perform tests at different temperatures.

[0039] Specifically, the opening and closing member 201 includes a support frame 201a, the support frame 201a is arranged on the base 101a, there are two support frames 201a, the two support frames 201a are respectively fixedly connected to the two sides of the fixing seat 102c, and have a certain height, a driving motor 201b is arranged on the support frame 201a, the driving motor 201b is fixedly connected to the two sides of the two supporting frames 201a, a driving rod 201c is arranged on the driving motor 201b, the driving rod 201c is connected to the driving motor 201b, the starting of the driving motor 201b makes the driving rod 201c move, a motor driving controller 201d is arranged on the driving motor 201b, the motor driving controller 201d is connected to the driving motor 201b and the terminal controller, and the driving motor 201b can be operated through the terminal controller and the motor driving controller 201d;

[0040] The opening and closing member 201 further includes a fixed block 201e, which is arranged on the driving rod 201c, and the fixed block 201e is connected to the driving rod 201c. The ice-covered groove 201f is arranged on the fixed block 201e, and the ice-covered groove 201f is fixedly connected to the fixed block 201e. The ice-covered groove 201f is a two semicircular structure. The fixed seat 102c is installed with a low-temperature sealing gasket 102d to achieve the sealing of the bottom of the ice-covered groove 201f. The low-temperature sealing gasket 201g is arranged on the ice-covered groove 201f. The low-temperature sealing gasket 201g is arranged on the ice-covered groove 201f. The gasket 201g is fixedly connected to the ice-coating groove 201f and is arranged at the opening and closing of the two ice-coating grooves 201f. The ice-coating groove 201f is composed of two left and right semicircles. A low-temperature sealing gasket 201g is installed at the opening and closing. The fixed block 201e is installed on the outer surface side of the ice-coating groove 201f and is connected to the end of the driving rod 201c. The driving rod 201c is connected to the driving motor 201b and is installed together on the support frame 201a. The motor drive controller 201d is connected to the driving motor 201b to realize the opening and closing of the ice-coating groove 201f.

[0041] Furthermore, the temperature control component 202 includes a heating layer 202a, which is arranged on the ice-coating groove 201f, and the heating layer 202a is fixedly connected to the inner surface of the ice-coating groove 201f. The temperature sensor 202b is arranged on the heating layer 202a, and the temperature controller 202c is arranged on the temperature sensor 202b. The heating layer 202a is tightly attached to the inner surface of the ice-coating groove 201f, and the temperature sensor 202b is installed on the surface of the lower clamp 102b fixed seat 102c. The ends of the heating layer 202a and the temperature sensor 202b are both connected to wires, and the outer layer of the wire part that passes through the base 101a and the fixed seat 102c is wrapped with a wire protection cover 103d, and the wires are centrally connected to the temperature controller 202c to realize temperature monitoring and control.

[0042] Furthermore, the filling member 203 includes a liquid injection pipe 203a, the liquid injection pipe 203a is arranged on the ice-coating groove 201f, the exhaust valve 203b is arranged on the ice-coating groove 201f, the pressure gauge 203c is arranged on the liquid injection pipe 203a, the pressure regulating valve 203d is arranged on the liquid injection pipe 203a, the liquid nitrogen tank 203e is arranged on the pressure regulating valve 203d, the liquid nitrogen delivery valve 203f is arranged on the liquid nitrogen tank 203e, and the liquid injection pipe 203a is installed in the ice-coating groove 201f. The exhaust valve 203b is installed on the top of the ice-coating tank 201f and is connected to the liquid injection pipe 203a for releasing the volatile gas of liquid nitrogen. The outside of the liquid injection pipe 203a is connected to the pressure gauge 203c and the pressure regulating valve 203d through a hose. The liquid nitrogen pressure is monitored by the pressure gauge 203c, and the pressure is regulated by the pressure regulating valve 203d. The other side of the pressure regulating valve 203d is connected to the liquid nitrogen delivery valve 203f and the liquid nitrogen tank 203e to realize the function of automatic liquid nitrogen injection.

[0043] The remaining structures are the same as those of Example 1.

[0044] Operation process: the driving rod 201c moves through the coordinated action of the motor driving controller 201d and the driving motor 201b, and then drives the ice-coating groove 201f to close through the fixed block 201e, and uses the low-temperature sealing gasket 201g to complete the sealing of the ice-coating groove 201f, and injects water into the ice-coating groove 201f until the composite insulator is completely immersed; the injection pipe 203a is installed inside the ice-coating groove 201f, and its outside is connected to the pressure gauge 203c and the pressure regulating valve 203d through a hose, which is used to monitor the liquid nitrogen pressure and regulate it. The other side of the pressure regulating valve 203d is connected to the liquid nitrogen delivery valve 203f and the liquid nitrogen tank 203e to realize the function of automatically injecting liquid nitrogen into the ice-coating groove 201f; the exhaust valve 203b is installed on the top of the ice-coating groove 201f and is connected to the injection pipe 203a to release the volatilized gas of the liquid nitrogen to ensure the pressure balance inside the ice-coating groove 201f Liquid nitrogen is injected into the inner wall of the ice-coating groove 201f through the injection pipe 203a, cooling the injected water and forming an ice layer; the temperature controller 202c collects the temperature data of the ice layer in the ice-coating groove 201f through the temperature sensor 202b, and heats the ice in the ice-coating groove 201f through the heating layer 202a, so as to monitor and control the temperature of the ice layer; the servo drive controller 103a drives the servo motor 101b to rotate, and the servo motor 101b controls the rotation of the lead screw 101c through the speed change device, so that the crossbeam 101d moves upward along the guide rod 101e to generate tension; the tension sensor 102e collects tension data, transmits it to the signal amplifier 102f through the wire, and then connects to the signal converter 102g to convert the tension signal into a digital signal; the terminal processor 103c simulates the tensile test environment of the composite insulator under different temperatures under icing conditions by adjusting the temperature.

[0045] Example 3

[0046] As a third embodiment of the present invention, a composite insulator tensile test method under simulated icing conditions is provided, comprising the following steps:

[0047] S1. First install the insulator to the test position; the insulator can be installed by stretching the moving part 101 and the stretching part 102 on the assembly 100.

[0048] S2, by adjusting and controlling the temperature of the insulator; after the ice-coating groove 201f is closed, water is injected into the ice-coating groove 201f until the composite insulator is completely immersed in water; liquid nitrogen is injected into the ice-coating groove 201f through the liquid injection pipe 203a, the pressure gauge 203c monitors the liquid nitrogen pressure, and the liquid nitrogen pressure is regulated by the pressure regulating valve 203d, and the liquid nitrogen passes through the inner wall of the ice-coating groove 201f to cool the injected water; the temperature controller 202c collects the temperature data of the ice in the ice-coating groove 201f through the temperature sensor 202b, and heats the ice in the ice-coating groove 201f through the heating layer 202a to realize temperature monitoring and control.

[0049] S3. Perform a tension test by starting the device; the servo drive controller 103a drives the servo motor 101b to rotate, and the servo motor 101b controls the rotation of the lead screw 101c, so that the crossbeam 101d moves upward along the guide rod 101e, thereby generating tension.

[0050] S4. Finally, the tension data at different temperatures are collected and analyzed. The tension sensor 102e collects the tension data, transmits it to the signal amplifier 102f through a wire, and connects to the signal converter 102g to convert the tension signal into a digital signal, thereby realizing the monitoring, control and temperature data recording of the ice temperature in the ice-coating trough 201f.

[0051] This method can effectively simulate the tensile test of composite insulators under icing conditions. By precisely controlling the injection of liquid nitrogen, the release of volatile gases, and the regulation of temperature, it provides a reliable experimental means for performance testing of composite insulators under different icing conditions.

[0052] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, as well as parameter values, mounting arrangements, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present invention. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other replacements, improvements, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the invention is not limited to a specific embodiment, but extends to numerous modifications still falling within the scope of the appended claims.

[0053] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0054] It should be understood that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but for those of ordinary skill having the benefit of this disclosure, without undue experimentation, the development effort will be a routine task of design, fabrication, and production.

[0055] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A composite insulator tensile test device under simulated icing conditions, characterized in that: include, A stretching assembly (100) comprises a moving member (101), a stretching member (102) and a control member (103), wherein the stretching member (102) is arranged on the moving member (101), and the control member (103) is arranged on the moving member (101); and The regulating component (200) comprises an opening and closing component (201), a temperature control component (202) and a pouring component (203), wherein the opening and closing component (201) is arranged on the moving component (101), the temperature control component (202) is arranged on the opening and closing component (201), and the pouring component (203) is arranged on the opening and closing component (201).

2. The composite insulator tensile test device under simulated icing conditions according to claim 1 is characterized in that: The moving part (101) comprises a base (101a), a servo motor (101b) is arranged on the base (101a), a lead screw (101c) is arranged on the servo motor (101b), a crossbeam (101d) is arranged on the lead screw (101c), and a guide rod (101e) is arranged on the crossbeam (101d).

3. The composite insulator tensile test device under simulated icing conditions according to claim 2 is characterized in that: The stretching member (102) comprises an upper clamp (102a), wherein the upper clamp (102a) is arranged on the crossbeam (101d), a lower clamp (102b) is arranged on the base (101a), a fixing seat (102c) is arranged on the lower clamp (102b), and a low-temperature sealing gasket (102d) is arranged on the fixing seat (102c).

4. The composite insulator tensile test device under simulated icing conditions according to claim 3 is characterized in that: The tensile member (102) further comprises a tension sensor (102e), wherein the tension sensor (102e) is arranged on the crossbeam (101d), a signal amplifier (102f) is arranged on the tension sensor (102e), and a signal converter (102g) is arranged on the signal amplifier (102f).

5. The composite insulator tensile test device under simulated icing conditions according to claim 3 or 4, characterized in that: The control component (103) comprises a servo drive controller (103a), wherein the servo drive controller (103a) is arranged on the servo motor (101b), a feedback controller (103b) is arranged on the servo drive controller (103a), a terminal processor (103c) is arranged on the feedback controller (103b), and a wire protection cover (103d) is arranged on the base (101a).

6. The composite insulator tensile test device under simulated icing conditions according to claim 5 is characterized in that: The opening and closing member (201) comprises a support frame (201a), wherein the support frame (201a) is arranged on the base (101a), a drive motor (201b) is arranged on the support frame (201a), a drive rod (201c) is arranged on the drive motor (201b), and a motor drive controller (201d) is arranged on the drive motor (201b).

7. The composite insulator tensile test device under simulated icing conditions according to claim 6, characterized in that: The opening and closing member (201) further comprises a fixing block (201e), wherein the fixing block (201e) is arranged on the driving rod (201c), an ice-coating groove (201f) is arranged on the fixing block (201e), and a low-temperature sealing gasket (201g) is arranged on the ice-coating groove (201f).

8. The composite insulator tensile test device under simulated icing conditions according to claim 7, characterized in that: The temperature control component (202) comprises a heating layer (202a), the heating layer (202a) is arranged on the ice coating groove (201f), a temperature sensor (202b) is arranged on the heating layer (202a), and a temperature controller (202c) is arranged on the temperature sensor (202b).

9. The composite insulator tensile test device under simulated icing conditions according to claim 8, characterized in that: The filling component (203) comprises a liquid injection pipe (203a), the liquid injection pipe (203a) is arranged on the ice coating groove (201f), the exhaust valve (203b) is arranged on the ice coating groove (201f), the pressure gauge (203c) is arranged on the liquid injection pipe (203a), the pressure regulating valve (203d) is arranged on the liquid injection pipe (203a), the liquid nitrogen tank (203e) is arranged on the pressure regulating valve (203d), and the liquid nitrogen delivery valve (203f) is arranged on the liquid nitrogen tank (203e).

10. A composite insulator tensile test method under simulated icing conditions, characterized in that: The composite insulator tensile test device under simulated icing conditions as claimed in any one of claims 1 to 9 comprises the following steps: First install the insulator to the test position; By adjusting the temperature of the insulator; Then conduct a tensile test by starting the device; Finally, the tensile data at different temperatures were collected and analyzed.

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