CN114659776A - Load simulation platform for spring mechanism defect test and operation method thereof - Google Patents

Abstract

The invention discloses a load simulation platform for a defect test of a spring mechanism and an operation method thereof. The platform comprises: a base frame, which is used as a fixed support base for the load simulation platform; a column, which is fixedly arranged on the base frame; an upper swing arm, a lower swing arm and a plurality of counterweight links; the upper swing arm and the lower swing arm are rotatably arranged on the upright column, and two ends of each counterweight link among the plurality of counterweight links are respectively hinged on the upper Swing arm and lower swing arm; transmission link, buffer arm and buffer, one end of the transmission link is hinged to one end of the upper swing arm, and the other end of the transmission link is used to connect the crank arm of the spring mechanism; the other end of the upper swing arm A buffer arm is fixedly arranged on the counterweight link at one end, and the buffer is arranged on the bottom frame. The present invention can simulate the load of the spring mechanism, and the motion characteristics and the load characteristics can highly conform to the motion of the moving contact of the circuit breaker, and have the characteristics of convenience and reliability.

Description

A load simulation platform for defect test of spring mechanism and its operation method

technical field

The invention belongs to the technical field of spring mechanism defect testing, and particularly relates to a load simulation platform for spring mechanism defect testing and an operation method thereof.

Background technique

Spring mechanism (for example, spring mechanism is also called spring operating mechanism, spring operating mechanism, etc.) is widely used in high-voltage circuit breakers to drive the movement of the moving contacts of the circuit breaker arc extinguishing chamber, so as to realize the opening and closing operation. ; Although the spring mechanisms of different types and models of high-voltage circuit breakers are different in structure, the basic functional modules are similar. For example, the CT20 spring mechanism is widely used in various high-voltage switch manufacturers, and the research literature on the spring mechanism is also widely published in industry literature journals. 1001-1609 (2012) 12-0143-05, the article titled "Fault Analysis and Countermeasures of High-Power CT20 Spring Mechanism After Closing and Breaking" records the relevant failure analysis of CT20 spring mechanism.

In order to cooperate with the non-contact measurement and state assessment of the mechanical characteristics of high-voltage circuit breakers, it is necessary to build a circuit breaker mechanical fault simulation device, so as to simulate a variety of typical mechanical fault defects and reduce the huge amount of money caused by the use of actual high-voltage circuit breaker experimental research. Cost and experimentation risk. Because the operating work of the spring mechanism is very large, if there is no corresponding load, the opening and closing of the mechanism will damage the spring mechanism itself, and may cause personal injury; the existing load simulation platforms generally use hydraulic cylinder loads, which are complicated in structure and cost. In addition, there is no good simulation for the stuck condition of the circuit breaker arc interrupter. To sum up, it is urgent to develop a new load simulation platform to provide the load for the simulation test of the spring mechanism for testing.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a load simulation platform for the defect test of a spring mechanism and an operation method thereof, so as to solve one or more of the above-mentioned technical problems. The invention specifically provides a load platform that can be used for the defect test of the spring mechanism, which can simulate the load of the spring mechanism, the motion characteristics and the load characteristics can highly conform to the motion of the circuit breaker moving contact, and have the characteristics of convenience and reliability.

To achieve the above object, the present invention adopts the following technical solutions:

A load simulation platform for spring mechanism defect test provided by the present invention includes:

Bottom frame, used as a fixed support base for the load simulation platform;

a column, the column is fixedly arranged on the chassis;

An upper swing arm, a lower swing arm and a plurality of counterweight links; the upper swing arm and the lower swing arm are rotatably arranged on the upright column, and each of the plurality of counterweight links is connected to The two ends of the rod are respectively hinged to the upper swing arm and the lower swing arm; wherein, the upper swing arm, the lower swing arm and any two counterweight links form a parallelogram link motion mechanism, and the counterweight link can The disassembled installation is equipped with a counterweight;

A transmission link, a buffer arm and a buffer, one end of the transmission link is hinged to one end of the upper swing arm, the other end of the transmission link is used to connect the crank arm of the spring mechanism, and the counterweight link is in the spring. Under the driving of the mechanism, it can move in the up and down direction; the counterweight link at the other end of the upper swing arm is fixedly provided with the buffer arm, the buffer is arranged on the chassis, and the buffer arm is connected to the buffer arm. The buffer is used to adjust the buffer force and buffer stroke.

A further improvement of the present invention is that the specific structure of one end of the transmission link being hinged to one end of the upper swing arm is as follows: one end of the upper swing arm is provided with two oppositely arranged chucks, and the transmission link is It is connected between two collets through a pin, and the two collets are clamped by clamps with adjustable clamping force.

A further improvement of the present invention is that it further comprises: a linear displacement sensor, the linear displacement sensor is arranged on the counterweight link or the counterweight block.

A further improvement of the present invention is that it further comprises: an angular displacement sensor, the angular displacement sensor is arranged on the upper swing arm or the lower swing arm.

A further improvement of the present invention is that the position of the buffer relative to the buffer arm can be adjusted; the part on the buffer arm used to smash the buffer is set as a circular arc surface.

A further improvement of the present invention is that the buffer is a spring-type buffer.

A further improvement of the present invention is that the end of the upper swing arm where the transmission link is provided is further provided with a connecting pin for connecting the auxiliary switch link mechanism of the spring mechanism.

A further improvement of the present invention is that it further comprises: a protective cover for protecting the load simulation platform.

A further improvement of the present invention is that the bottom frame is provided with a connecting mechanism for fixing and installing the spring mechanism.

A method for operating a load simulation platform for a spring mechanism defect test provided by the present invention includes the following steps:

Adjust the mass of the load movement by adjusting the counterweight to simulate the change of the mechanical characteristics of the circuit breaker during opening and closing time caused by excessive resistance or eccentricity of the circuit breaker body;

By adjusting the buffer force, buffer position and buffer stroke of the buffer to simulate the defect simulation of the buffer position, force and buffer input time after the buffer oil leaks.

Compared with the prior art, the present invention has the following beneficial effects:

The load simulation platform for the defect test of the spring mechanism provided by the present invention adopts the method of weight counterweight as the simulated load, which avoids the defects that the hydraulic load is easy to cause oil leakage and the pneumatic load is too noisy; The method of re-up and down movement is highly in line with the movement characteristics of the arc extinguishing chamber of the circuit breaker body, and can easily be used for the defect simulation test of the spring mechanism of the high-voltage circuit breaker. For specific explanation, the actual movement of the circuit breaker is the linear displacement opening and closing movement stroke between the dynamic and static contacts. After contacting each other, there is friction, and there may be a large friction force due to sticking. The counterweight on the rod simulates the size of the load and the movement stroke, the buffer is used to simulate the mechanical characteristics of the stroke at the end of the opening movement, and the clamp with adjustable clamping force is used to simulate and adjust the size of the clamping force, so it can be highly Simulate motion characteristics.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the accompanying drawings used in the description of the embodiments or the prior art; obviously, the accompanying drawings in the following description are For some embodiments of the present invention, for those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative efforts.

1 is a schematic diagram of the overall structure of a load simulation platform for a spring mechanism defect test provided by an embodiment of the present invention;

Fig. 2 is a partial enlarged schematic diagram of the embodiment provided in Fig. 1;

3 is a schematic diagram of the connection of a column, an upper swing arm, a lower swing arm, a counterweight link and a counterweight block structure in the embodiment provided in FIG. 1;

Fig. 4 is the connection schematic diagram of the chuck, the clamp and the transmission link of the upper swing arm in the embodiment provided in Fig. 1;

In the figure, 1, the chassis; 2, the column; 3, the upper swing arm; 4, the lower swing arm; 5, the counterweight link; 6, the counterweight block; 7, the transmission link; 8, the spring mechanism; 9, Lever arm; 10, buffer arm; 11, buffer; 12, connecting pin; 13, linear displacement sensor; 14, angular displacement sensor; 15, arc surface; 16, collet; 17, clamp; 18, auxiliary switch ;19, upper connecting shaft; 20, lower connecting shaft; 21, auxiliary switch linkage mechanism; 22, first clamping part; 23, second clamping part; 24, adjusting screw; 25, threaded hole; 26, card Protruding; 27, card slot; 28, countersunk hole.

Detailed ways

In order to make those skilled in the art better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only Embodiments are part of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

It should be noted that the terms "first", "second" and the like in the description and claims of the present invention and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used may be interchanged under appropriate circumstances such that the embodiments of the invention described herein can be practiced in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having" and any variations thereof, are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those expressly listed Rather, those steps or units may include other steps or units not expressly listed or inherent to these processes, methods, products or devices.

Below in conjunction with accompanying drawing, the present invention is described in further detail:

Referring to FIG. 1 , an embodiment of the present invention provides a load simulation platform for a defect test of a spring mechanism, which can conveniently be used for a high-voltage circuit breaker spring mechanism to perform a defect simulation test; the load simulation platform includes: a chassis 1, which is The base frame 1 is provided with two oppositely arranged uprights 2 (exemplarily, the uprights 2 and the base frame 1 can be detachably fixedly connected by bolts); The shaft 20 is rotatably connected with the upper swing arm 3 and the lower swing arm 4; between the upper swing arm 3 and the lower swing arm 4, there are several equal-length and mutually parallel counterweight links 5, each counterweight link 5 The two ends are rotatably connected to the upper swing arm 3 and the lower swing arm 4 respectively, and each counterweight link 5 is detachably connected with a number of counterweight blocks 6; the right end of the upper swing arm 3 is rotatably connected with a transmission link Rod 7, the transmission link 7 is used to connect the arm 9 of the spring mechanism 8, and each counterweight link 5 can move up and down under the drive of the spring mechanism 8;

A buffer arm 10 extending to the left is provided on the counterweight link 5 connected to the left end of the upper swing arm 3 and the lower swing arm 4, and the left end of the chassis 1 is provided with a buffer 11. When the counterweight link 5 moves downward When reaching a certain position, the buffer arm 10 smashes the buffer 11 .

The technical solution of the present invention is an explanatory description of the invention point. The present invention is provided with a crank arm, a connecting rod, a counterweight block, a buffer and a clamp; Linear displacement to determine whether the displacement is consistent with the stroke of the circuit breaker. If the stroke is inconsistent, the running stroke of the counterweight can be adjusted by adjusting the angle of the transmission link and the crank arm; the angular displacement sensor verifies the stroke measured by the linear displacement sensor. Among them, the mass of the counterweight is adjustable and the stroke is adjustable; the clamp is used to simulate the jamming, and the buffer is used to simulate the characteristics of the movement end of the mechanism.

Please refer to FIG. 1 and FIG. 2 , preferably in the embodiment of the present invention, the right end of the upper swing arm 3 is further provided with a connecting pin 12 for connecting the auxiliary switch link mechanism 21 of the spring mechanism 8 ; the counterweight link 5 Or the counterweight 6 is also provided with an interface for a linear displacement sensor 13, and the upper swing arm 3 or the lower swing arm 4 is also provided with an interface for installing an angular displacement sensor 14, and the sensor is used to measure the stroke.

Specifically, the buffer 11 may be a spring-type buffer, the part of the buffer arm 10 for smashing the buffer 11 is set as a circular arc surface 15 , and the position of the buffer 11 relative to the buffer arm 10 can be adjusted.

The bottom frame 1 is provided with an interface for installing the anchor bolts, and the right part of the bottom frame is provided with an interface for installing the spring mechanism 8 . The right end of the upper swing arm 3 is provided with two oppositely arranged collets 16, the transmission link 7 is connected between the two collets 16 through a pin shaft, and the two collets 16 are adjusted by the clamping force. The clip 17 is clamped.

Preferably, the embodiment of the present invention further includes a protective cover for covering the simulation platform.

The embodiment of the present invention provides a convenient and reliable load platform for the defect simulation test of the spring mechanism. By arranging an upper swing arm, a lower swing arm, a counterweight link, a counterweight block and a buffer between the two uprights of the base frame The method simulates the load of the spring mechanism for the test of the spring mechanism. The spring mechanism can drive the counterweight link and the counterweight block to move up and down through the transmission link. The movement characteristics and load characteristics can highly match the movement of the circuit breaker moving contact. .

In the load simulation platform used for the defect test of the spring mechanism of the present invention, the upper swing arm, the lower swing arm, the counterweight link, the counterweight block and the buffer are arranged between the two upright columns of the base frame. The load of the spring mechanism is simulated for the test of the spring mechanism. The spring mechanism can drive the counterweight link and the counterweight block to move up and down through the transmission link. The mechanism's defect simulation test provides a convenient and reliable load platform.

Referring to FIGS. 1 to 3 , in a load simulation platform for a defect test of a spring mechanism provided by an embodiment of the present invention, three vertically arranged counterweights are arranged between the upper swing arm 3 and the lower swing arm 4 Connecting rod 5, the two ends of each counterweight link 5 are connected to the upper swing arm 3 and the lower swing arm 4 through pins, and each counterweight link 5 can be connected to a number of counterweight blocks 6, the upper swing arms 3, The lower swing arm 4 and the counterweight link 5 form a parallelogram link motion mechanism, the upper swing arm 3 is connected between the two columns 2 through the upper connecting shaft 19, and the lower swing arm 4 is connected to the two columns through the lower connecting shaft 20. 2, the distance between the upper connecting shaft 19 and the lower connecting shaft 20 is equal to the distance between the pins at both ends of each counterweight link 5; in this way, the spring mechanism 8 drives the upper rotating arm 9 through the transmission link 7 When swinging up and down, the upper swing arm 3 drives each counterweight link 5 and the lower swing arm 4 to move, and each counterweight link 5 maintains a vertical state during the movement, and the height conforms to the vertical movement of the vertical circuit breaker arc extinguishing chamber. movement characteristics.

Compared with the situation of the old spring mechanism running-in platform, which has a large volume and is inconvenient to adjust, the load simulation platform for the spring mechanism defect test provided by the embodiment of the present invention adopts a load simulation platform similar to the load of the high-voltage circuit breaker body. The up-and-down movement mode, and the detachable connection between the counterweight block and the counterweight link, is very easy to adjust, which can simulate defects such as the eccentricity of the high-voltage circuit breaker body or the increase in load caused by severe ablation.

An auxiliary switch 18 is provided in the spring mechanism 8 of the high-voltage circuit breaker. The auxiliary switch 18 is used to feed back the disconnection state signal of the circuit breaker body to the spring mechanism 8. The auxiliary switch 18 has a link mechanism, and the link mechanism is generally connected to the spring mechanism. On the transmission part between the mechanism 8 and the circuit breaker body, when the transmission part moves to the opening and closing state, it drives the link mechanism to move and triggers the opening and closing signal to the energy storage motor and other components of the spring mechanism 8, as shown in Figures 1 to 1. 3, the right end of the upper swing arm 3 is also provided with a connecting pin 12 for connecting the auxiliary switch 18 of the spring mechanism 8. When the upper swing arm 3 rotates, it will drive the link mechanism of the auxiliary switch 18 to move, so that the auxiliary switch 18 Generates a signal that feeds back the open state of the circuit breaker. By replacing the moving parts in the linkage mechanism of the auxiliary switch 18, the failure/defect of the high-voltage circuit breaker caused by the defect of the auxiliary switch of the high-voltage circuit breaker 18 or the defect of untimely switching can be simulated.

In order to easily test the mechanical characteristics of the output of the spring mechanism 8 to the moving contact of the circuit breaker, the counterweight link 5 or the counterweight block 6 is also provided with an interface for the linear displacement sensor 13, and the linear displacement sensor 13 can be installed On the chassis 1, the detection end of the linear displacement sensor 13 is connected to the counterweight link 5 or the counterweight block 6 to test the linear displacement output from the spring mechanism 8 to the movable contact of the circuit breaker. During the test, adjust the transmission link The angle with the crank arm keeps the linear displacement of the counterweight connecting rod and the counterweight block consistent with the displacement of the circuit breaker arc extinguishing chamber, so as to accurately simulate the mechanical characteristics of the movement of the circuit breaker moving contact. Fig. 1 shows the connection of the linear displacement sensor 13 and the counterweight 6. The upper swing arm 3 or the lower swing arm 4 is also provided with an interface for installing the angular displacement sensor 14, which can be used to test the output of the operating mechanism , to verify the output angular displacement of the operating mechanism. By installing the linear displacement sensor 13 and the angular displacement sensor 14 , it is convenient to study the influence of the mechanism defect on the mechanical properties measured under the traditional measurement method.

In the load simulation platform for the defect test of the spring mechanism provided by the embodiment of the present invention, a buffer 11 is installed on the bottom frame 1, and the buffer 11 is detachably connected to the bottom frame 1, so that the buffer can be easily replaced as required The buffer 11 is adjusted to adjust the buffer force and buffer stroke, so that the platform has the function of simulating the defect of the spring mechanism buffer 11. As a preferred embodiment, as shown in FIG. 1 and FIG. 3 , the buffer 11 is a spring-type buffer 11 , and the part of the buffer arm 10 for pressing the buffer 11 is set as a circular arc surface 15 In this way, the friction between the buffer arm 10 and the buffer 11 is relatively smooth during the contact process of the two, which can better simulate the movement characteristics of the end of the moving contact of the circuit breaker, and also prevent the moving parts from being damaged by overtravel movement. In order to simulate the movement stroke and movement characteristics of different types of circuit breakers, the position of the buffer 11 relative to the buffer arm 10 can be adjusted.

Since the operation work of the spring mechanism 8 is very large, in order to prevent the accidental collapse of the parts during the test, a load simulation platform for the defect test of the spring mechanism of the present invention also includes a protective cover for covering the simulation platform (Fig. not shown). The spring mechanism 8 will generate a large vibration when operating. In order to make the simulation platform stable and have a better shock absorption effect, the chassis 1 is a high-strength chassis 1 welded by H-beam. It is not easy to overturn during the 8-point closing operation. The base frame 1 is provided with an interface for installing anchor bolts. After the simulation platform is transported to the laboratory or the target test site, it can be partially pre-buried cement piles in the test site. , pre-embedded steel guide rails, etc. to fix the chassis 1, or you can use the method of drilling expansion bolts on the ground to fix the chassis 1 of the simulation platform to the ground. The right part of the base frame 1 is provided with an interface for installing the spring mechanism 8, and the spring mechanism 8 is fixed on the right part of the base frame 1 by high-strength bolts.

In order to simulate the friction and sticking phenomenon during the operation of the arc extinguishing chamber of the circuit breaker, as shown in FIG. 1 , FIG. 2 and FIG. The rod 7 is connected between the two collets 16 through a pin, and the two collets 16 are clamped by a clamp 17 with adjustable clamping force. The clamp 17 has two oppositely arranged first clamping parts 22 and second clamping parts. Two clamping parts 23, the first clamping part 22 and the second clamping part 23 are respectively clamped on the outside of the two clamping heads 16 of the upper swing arm 3, the first clamping part 22 is provided with a threaded hole 25, the threaded hole 25 There is an adjusting bolt 24 in the middle. By tightening the adjusting bolt 24, the first clamping part 22 and the second clamping part 23 can be relatively clamped, and loosening the adjusting bolt 24 can make the first clamping part 22 and the second clamping part 23 is relatively loose, and the clamping force of the clamp 17 can be adjusted by adjusting the bolt 24. When it is necessary to simulate the situation that the circuit breaker is stuck and the friction is large, the clamping force of the clamp 17 is adjusted to a larger value so that the clamp 17 will clamp the clamp. 16 is clamped, so that the collet 16 clamps the transmission link 7 to generate a large stagnant friction between the transmission link 7 and the collet 16, and adjust the clamp 17 according to the required simulated stagnation friction. the clamping force. Since the operating work of the spring mechanism 8 is very large, the speed when the spring mechanism drives the upper swing arm to move will be very high, and when the clamp 17 is clamped to simulate the friction of the circuit breaker, the clamping force of the clamp 17 needs to be adjusted, which may The clamping force of the clamp 17 will be adjusted to be smaller. If the clamping force of the clamp 17 is not large enough or accidentally loosens, the dangerous situation that the clamp 17 will fall off and fly out is easy to occur. In order to prevent this dangerous situation from happening, As shown in FIG. 4 , a counterbore 28 is provided on the first clamping part 22 , the end of the adjusting bolt 24 extends into the counterbore 28 and is pressed against the bottom of the counterbore 28 , and is provided on the second clamping part 23 There is a clamping protrusion 26, a clamping groove 27 is provided on the outer side of the collet 16 pressed by the second clamping part 23 on the upper swing arm 3, and the clamping protrusion 26 is clamped in the clamping groove 27. Even if the clamping force is small and the clamp is loose, as long as the end of the adjusting bolt 24 is kept in the counterbore 28 and the clamping protrusion 26 is maintained in the clamping slot 27, the clamp 17 will not be disengaged from the upper swing arm 3. In this way, the clamping force of the clamp 17 can be easily adjusted to simulate different magnitudes of clinching force, and the safety of equipment and personnel can also be reliably ensured.

In the embodiment of the present invention, when the defect simulation test of the spring mechanism is carried out by using the load simulation platform for the defect test of the spring mechanism of the present invention, the spring mechanism to be tested is installed on the chassis and connected with the transmission link, and then The simulation can be realized by adjusting the relevant parts to the defect state. The main types of defect simulation and related monitoring and measurement functions that can be realized include:

(1) By adjusting the opening electromagnet of the spring mechanism and the opening detent gap too large or too small, the size of the electromagnet stroke and other parameters to simulate the circuit breaker refusal defect caused by the electromagnet defect, the mechanism can be realized. Simulation of multiple gap defects;

(2) Adjust the mass of the load movement by adjusting the counterweight to simulate the change of mechanical characteristics such as the opening and closing time of the circuit breaker caused by the excessive resistance of the circuit breaker body or the eccentricity, which in turn leads to a possible refusal to act;

(3) By adjusting the buffer force, buffer position and buffer stroke of the buffer to simulate the defect simulation of the buffer position, force and buffer input time after the buffer oil leaks;

(4) By replacing the auxiliary switch of the spring mechanism or the relevant parts in the link mechanism connected to the auxiliary switch, simulate the failure/defect of the high-voltage circuit breaker caused by the defect of the auxiliary switch of the high-voltage circuit breaker or the defect of untimely switching;

(5) By adjusting the size and matching relationship of the relevant parts in the spring mechanism, simulate the opening of the spring mechanism after it is closed (a closing and opening, that is, only the closing command is given, but the spring mechanism has completed the closing and opening command) defects, closing and opening Rejection defect in the operation of opening/closing, single-closing/single-point rejection and rejection;

(6) By adjusting the opening and closing spring and its bearing parts in the spring mechanism, simulate the weak defect of the opening and closing spring of the spring mechanism, which will cause the mechanical characteristics of the spring mechanism to change or refuse to move;

(7) Under various defect conditions of the spring mechanism, the mechanical properties measured by conventional angular displacement sensors and linear displacement sensors can be compared with the mechanical properties of non-contact measurement methods such as laser vibration, laser displacement, and visual measurement;

(8) Collection and analysis of physical information such as contact mechanical vibration and non-contact sound characteristics under various defect conditions of the spring mechanism.

It should be noted that, regarding the specific structure of the spring mechanism, the designs of different models and different manufacturers are different, but the functions that can be realized by the spring mechanism are basically the same, and the related functional modules and even the structures are relatively similar. The related structures and related functions of the spring mechanism itself are well known to those skilled in the art, and the specific structures cannot be described in detail, so they will not be described in detail.

To sum up, the load simulation platform for the defect test of the spring mechanism provided by the embodiment of the present invention adopts the method of weight counterweight as the simulated load, which avoids the defects that the hydraulic load is easy to cause oil leakage and the pneumatic load is too noisy. Moreover, the load simulation platform of the present invention for the defect test of the spring mechanism has cleverly designed the way of the up and down movement of the counterweight, which is highly in line with the movement characteristics of the arc-extinguishing chamber of the circuit breaker body, and can be conveniently used for the spring mechanism of the high-voltage circuit breaker. Defect simulation test. The invention effectively overcomes various shortcomings in the prior art and has high industrial utilization value.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: the present invention can still be Modifications or equivalent replacements are made to the specific embodiments of the present invention, and any modifications or equivalent replacements that do not depart from the spirit and scope of the present invention shall be included within the protection scope of the claims of the present invention.

Claims (10)

1. A load simulation platform for a spring mechanism defect test is characterized by comprising:

the base frame (1) is used as a fixed supporting base of the load simulation platform;

the upright post (2), the upright post (2) is fixedly arranged on the underframe (1);

an upper swing arm (3), a lower swing arm (4) and a plurality of counterweight connecting rods (5); the upper swing arm (3) and the lower swing arm (4) are rotatably arranged on the upright post (2), and two ends of each counterweight connecting rod (5) in the counterweight connecting rods (5) are respectively hinged to the upper swing arm (3) and the lower swing arm (4); the upper swing arm (3), the lower swing arm (4) and any two counterweight connecting rods (5) form a parallelogram connecting rod movement mechanism, and counterweight blocks (6) are detachably mounted on the counterweight connecting rods (5);

the buffer mechanism comprises a transmission connecting rod (7), a buffer arm (10) and a buffer (11), wherein one end of the transmission connecting rod (7) is hinged to one end of the upper swing arm (3), the other end of the transmission connecting rod (7) is used for being connected with a crank arm of a spring mechanism, and a counterweight connecting rod (5) can move in the vertical direction under the driving of the spring mechanism; the counterweight connecting rod (5) at the end part of the other end of the upper swing arm (3) is fixedly provided with the buffer arm (10), the buffer (11) is arranged on the underframe (1), and the buffer arm (10) and the buffer (11) are matched to adjust buffer force and buffer stroke.

2. The load simulation platform for the spring mechanism defect test according to claim 1, wherein one end of the transmission connecting rod (7) is hinged to one end of the upper swing arm (3) by the specific structure: one end of the upper swing arm (3) is provided with two oppositely arranged chucks (16), the transmission connecting rod (7) is connected between the two chucks (16) through a pin shaft, and the two chucks (16) are clamped by a clamp (17) with adjustable clamping force.

3. The load simulation platform for the spring mechanism defect test as claimed in claim 1, further comprising:

the linear displacement sensor (13), linear displacement sensor (13) set up in counter weight connecting rod (5) or on balancing weight (6).

4. The load simulation platform for the spring mechanism defect test as claimed in claim 3, further comprising:

an angular displacement sensor (14), wherein the angular displacement sensor (14) is arranged on the upper swing arm (3) or the lower swing arm (4).

5. A load simulation platform for spring mechanism defect testing according to claim 1, characterized in that the position of the buffer (11) relative to the buffer arm (10) is adjustably arranged; the part of the buffer arm (10) used for smashing and pressing the buffer (11) is provided with an arc surface (15).

6. The load simulation platform for the spring mechanism defect test of claim 1, wherein the buffer (11) is a spring type buffer.

7. The load simulation platform for the spring mechanism defect test is characterized in that one end of the upper swing arm (3) provided with the transmission connecting rod (7) is also provided with a connecting pin (12) for connecting an auxiliary switch connecting rod mechanism of the spring mechanism.

8. The load simulation platform for the spring mechanism defect test as claimed in claim 1, further comprising:

and the protective cover is used for protecting the load simulation platform.

9. The load simulation platform for the spring mechanism defect test is characterized in that the base frame (1) is provided with a connecting mechanism for fixedly mounting the spring mechanism.

10. The operation method of the load simulation platform for the spring mechanism defect test, which is characterized by comprising the following steps:

the load motion quality is adjusted by adjusting the balancing weight (6) so as to simulate the change of the mechanical characteristics of the opening and closing time of the circuit breaker caused by overlarge resistance or eccentricity of the circuit breaker body;

the size of the buffering force, the position of the buffer and the buffering stroke of the buffer (11) are adjusted to simulate the defect simulation of the buffering position, the force size and the buffering input time of the mechanism after the oil leakage of the buffer.

Images