CN224176254U

CN224176254U - Test fixture and test power device

Info

Publication number: CN224176254U
Application number: CN202520684036.XU
Authority: CN
Inventors: 徐然
Original assignee: Chint Electric Co Ltd
Current assignee: Chint Electric Co Ltd
Priority date: 2025-04-11
Filing date: 2025-04-11
Publication date: 2026-04-28
Anticipated expiration: 2035-04-11

Abstract

This utility model belongs to the field of switchgear technology and discloses a test fixture and a test power device. The test power device includes a moving block, a fixed block, and a test fixture. The moving block is disposed at the moving end of the test power device, and the fixed block is disposed at the fixed end of the test power device. The test fixture includes a connector, a first limiting member, a fixed seat, and a fastening assembly. One end of the connector can be connected to the moving block, and the other end is provided with a first slot, into which at least a portion of the connector head can be inserted. The first limiting member is used to limit the connector head within the first slot. The fixed seat is connected to the fixed block. The fastening assembly includes the first limiting member and a first fastener. Both sides of the workpiece body and the side of the workpiece body away from the connector head are fixed to the fixed seat by the fastening assembly, thereby simulating the stress condition of the connecting arm under actual use conditions and improving the accuracy and reliability of the test results.

Description

Test fixture and test power device

Technical Field

The utility model relates to the technical field of switching equipment, in particular to a testing tool and a testing power device.

Background

The breaker module in the gas-insulated metal-enclosed switchgear is one of the core components thereof, while the coupling arm is used as an important transmission part of the arc extinguishing chamber in the breaker module, and is subjected to tensile force and compressive force in actual operation, and the performance of the coupling arm directly affects the stability and reliability of the operation of the breaker.

At present, the traditional tensile test tool usually adopts a mode of clamping two ends of the connecting arm to carry out tensile test, and the method can only carry out basic verification on the tensile mechanical property of the connecting arm material, can not simulate the stress condition of the connecting arm in the actual working state, is difficult to comprehensively evaluate the potential influence of the structural design and the manufacturing process of the connecting arm on the performance, and can not fully meet the verification requirement on the comprehensive performance of the connecting arm.

Therefore, a testing tool and a testing power device are needed to solve the above problems.

Disclosure of utility model

The utility model aims to provide a test tool which can effectively simulate the stress state of a workpiece to be tested under the actual use condition, and improves the reliability and accuracy of a test result.

To achieve the purpose, the utility model adopts the following technical scheme:

The test fixture is arranged on the test power device and used for being connected with a workpiece to be tested, the test power device comprises a movable end and a fixed end, the workpiece to be tested comprises a workpiece body and a connector, and the test fixture comprises:

One end of the connecting piece is connected with the movable end, a first slot is formed in the other end of the connecting piece, and at least part of the connecting head can be inserted into the first slot;

the first limiting piece is used for limiting the connector to be positioned in the first slot;

the fixed seat is connected with the fixed end;

The fastening assembly is used for fastening two sides of the workpiece body and one side, deviating from the connector, of the workpiece body on the fixing seat.

Optionally, the connecting piece includes first cylinder, first slot set up in on the first cylinder, first cylinder radially be equipped with the first through-hole of first slot intercommunication, the radial first pinhole that is equipped with of connector, first through-hole with first pinhole coaxial alignment, first locating part wears to locate first through-hole with in the first pinhole.

Optionally, the connecting piece still includes the second post, the one end of second post with first cylinder is connected, the other end with remove the end and be connected, the diameter of second post is less than the diameter of first cylinder, just the second post with the junction of first cylinder is equipped with first fillet structure.

Optionally, the fastening assembly includes a first fastener, the both sides of work piece body are equipped with first fixed orifices respectively, the both sides of fixing base are equipped with the second fixed orifices respectively, first fixed orifices can rather than corresponding the coaxial alignment of second fixed orifices, first fastener passes in proper order first fixed orifices with the second fixed orifices and fastening.

Optionally, the fixing seat is provided with a containing groove, and at least part of the workpiece body is located in the containing groove.

Optionally, a boss is arranged at the bottom of the workpiece body, a positioning groove is arranged at the bottom wall of the accommodating groove, and the boss can be inserted into the positioning groove.

Optionally, the fastening assembly includes a second fastening piece, a side of the fixing seat facing away from the accommodating groove is provided with a countersink, and the second fastening piece passes through a bottom wall of the countersink and is in threaded connection with the workpiece body.

Optionally, the test fixture further includes a second limiting part and a third limiting part, the second limiting part is used for enabling the connecting part to be detachably connected with the moving end of the test power device, and the third limiting part is used for enabling the fixing base to be detachably connected with the fixing end of the test power device.

Optionally, the diameter of the first limiting member is D1, the diameter of the second limiting member is D2, and the diameter of the third limiting member is D3, wherein d2=d3 > D1.

The utility model further aims to provide the test tool, which can effectively simulate the stress state of the workpiece to be tested under the actual use condition, and improves the reliability and accuracy of the test result.

the test power device comprises the test tool, wherein the moving end of the test power device is provided with a moving block, the fixed end of the test power device is provided with a fixed block, the connecting piece is connected with the moving block, and the fixed seat is arranged on the fixed block.

The beneficial effects are that:

Meanwhile, at least part of the workpiece body is positioned in the accommodating groove, two sides of the workpiece body and one side of the workpiece body, which is away from the connector, are fastened on the fixing seat through the fastening component, so that the workpiece body is firmly positioned, the testing process is closer to the actual use condition, and the reliability and accuracy of the testing result are improved.

The test power device provided by the utility model can effectively simulate the stress state of the workpiece to be tested under the actual use condition, and improves the reliability and accuracy of the test result.

Drawings

FIG. 1 is a schematic view of a prior art attachment arm mounting structure;

FIG. 2 is a schematic diagram of a test power plant according to the present utility model;

FIG. 3 is a cross-sectional view of a test power plant provided by the present utility model;

fig. 4 is an exploded view of the test fixture and the test piece to be tested provided by the utility model.

In the figure:

10. The device comprises a workpiece to be tested, a workpiece body, 1011, a first fixing hole, 1012, a boss, 1013, a threaded hole, 102, a connector, 1021, a first pin hole, 20, a main pull rod, 30, an auxiliary pull rod, 40, a movable side of a first arc-extinguishing chamber, 401, a first rod piece, 50, a movable side of a second arc-extinguishing chamber, 501, a second rod piece, 60, a first bolt, 70 and a second bolt;

100. The connecting piece comprises a connecting piece, a first column body, a 111, a first slot, a 112, a first through hole, a 120, a second column body, a 121, a second through hole, a 130 and a round angle structure;

200. a first limiting member;

300. the device comprises a fixing seat, 310 parts of a containing groove, 311 parts of a positioning groove, 320 parts of a second fixing hole, 330 parts of a sinking groove, 331 parts of an avoiding hole, 340 parts of a fixing part, 341 parts of a third through hole, 350 parts of an arc transition structure;

400. a fastening assembly 410, a first fastener 420, a second fastener;

500. The device comprises a moving block, 510, a second slot, 520, a second pin hole, 600, a fixed block, 610, a third slot, 620, a third pin hole, 700, a second limiting piece and 800, a third limiting piece.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.

In the description of the present utility model, unless explicitly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may, for example, be fixedly connected, detachably connected, or integrally formed, mechanically connected, electrically connected, directly connected, indirectly connected through an intervening medium, or in communication between two elements or in an interaction relationship between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are orientation or positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

The circuit breaker module in the gas-insulated metal-enclosed switchgear generally includes a first arc-extinguishing chamber, a second arc-extinguishing chamber, a main pull rod 20 and an auxiliary pull rod 30, a first rod 401 is disposed on a moving side in the first arc-extinguishing chamber, a second rod 501 is disposed on a moving side 50 of the second arc-extinguishing chamber, a connecting arm includes a workpiece body 101 and a connecting head 102, a first pin hole 1021 is disposed on the connecting head 102, first fixing holes 1011 are disposed on two sides of the workpiece body 101, a boss 1012 is disposed at a bottom end of the workpiece body 101, and a threaded hole 1013 is disposed on the boss 1012.

As shown in fig. 1, in actual operation, two sides of the coupling arm are respectively provided with an auxiliary pull rod 30, the inside of the auxiliary pull rod 30 is of a hollow structure, each auxiliary pull rod 30 corresponds to a first fixing hole 1011, and a first bolt 60 can pass through the first fixing hole 1011 of the coupling arm, the end parts of the auxiliary pull rod 30 and the second rod 501 and fasten, so that the coupling arm, the auxiliary pull rod 30 and the second rod 501 are fastened and connected, and the moving side 40 of the first arc extinguishing chamber is rigidly connected with the threaded hole 1013 on the bottom side of the coupling arm through the second bolt 70, so that the moving side 40 of the first arc extinguishing chamber is connected with the moving side 50 of the second arc extinguishing chamber, that is, the first rod 401 and the second rod 501 are connected. The connector 102 is fixedly connected with the main pull rod 20 of the circuit breaker through a first limiting piece 200 penetrating through a first pin hole 1021 on the connector 102, and the main pull rod 20 is connected with a mechanism of the circuit breaker to serve as a power source.

In combination with the use condition of the connecting arm in the breaker module, the embodiment provides a testing tool and a testing power device, wherein the testing tool is applied to the testing power device and is used for fixing the connecting arm so as to simulate the stress condition of the workpiece 10 to be tested in the real use state.

Hereinafter, the structure of the test fixture and the test power device will be described in detail by taking the to-be-tested workpiece 10 as a coupling arm in the breaker module and taking the test power device as a tensile machine as an example.

As shown in fig. 2-4, the moving end of the test power device is provided with a moving block 500, the fixed end of the test power device is provided with a fixed block 600, the test fixture comprises a connecting piece 100, a first limiting piece 200, a fixed seat 300 and a fastening assembly 400, one end of the connecting piece 100 is connected with the moving block 500, the other end of the connecting piece is provided with a first slot 111, at least part of a connector 102 can be inserted into the first slot 111, the first limiting piece 200 penetrates through the connecting piece 100 and the connector 102 along the radial direction of the connecting piece 100, so that the connector 102 is limited in the first slot 111, the fixed seat 300 is connected with the fixed block 600 and is positioned below the connecting piece 100, the fastening assembly 400 is used for fastening two sides of a workpiece body 101 and one side of the workpiece body 101, which deviates from the connector 102, on the fixed seat 300, so that the stress condition of a connecting arm in an actual working state can be simulated, the test process is closer to the actual working condition, and the reliability and the accuracy of a test result are improved. And moreover, the test fixture can be directly matched with the existing test power device for use, and a new test power device is not required to be purchased additionally or the existing test power device is not required to be modified, so that the production cost is reduced.

Optionally, as shown in fig. 3 and fig. 4, the connecting piece 100 includes a first cylinder 110, a first slot 111 is disposed on the first cylinder 110, a first through hole 112 that is communicated with the first slot 111 is radially disposed on the first cylinder 110, a first pin hole 1021 is radially disposed on the connector 102, the first through hole 112 is coaxially aligned with the first pin hole 1021, and the first limiting piece 200 is disposed in the first through hole 112 and the first pin hole 1021 in a penetrating manner, so as to ensure the stability of connection, prevent the connector 102 from loosening or displacing, and fix the connector 102 by adopting the first limiting piece 200, so that the connection between the connector 102 and the first cylinder 110 is more convenient, the quick assembly or replacement is facilitated, and the use convenience and the maintenance efficiency of the test tool are improved.

Optionally, as shown in fig. 4, the connecting piece 100 further includes a second post 120, one end of the second post 120 is connected with the first post 110, the other end is connected with the moving end, the diameter of the second post 120 is smaller than that of the first post 110, and a first rounded corner structure 130 is disposed at the connection position of the second post 120 and the first post 110, so that stress concentration can be effectively reduced, fatigue damage of local stress points can be reduced, and impact resistance of the overall structure can be improved.

Optionally, the test fixture includes a second limiting member 700, and the connecting member 100 is detachably connected to the moving block 500 through the second limiting member 700. Specifically, as shown in fig. 2, 3 and 4, the moving block 500 is provided with a second slot 510 and a second pin hole 520 radially arranged along the second slot, the second column 120 is radially provided with a second through hole 121, at least part of the second column 120 is inserted into the second slot 510, so that the second pin hole 520 is aligned with the second through hole 121 coaxially, and the second limiting member 700 is inserted into the second pin hole 520 and the second through hole 121, thereby fixing the second column 120 and the moving block 500, and improving the connection stability of the connecting member 100 and the moving block 500. And, the second cylinder 120 of the connecting piece 100 is connected with the moving block 500 through the second limiting piece 700, so that the connecting piece 100 is convenient to install and replace, the flexibility of the test power device is improved, the assembly time is reduced, and the test efficiency is improved.

Optionally, as shown in fig. 3, the fastening assembly 400 includes a first fastener 410, two sides of the workpiece body 101 are respectively provided with a first fixing hole 1011, two sides of the fixing base 300 are respectively provided with a second fixing hole 320, the first fixing holes 1011 can be coaxially aligned with the corresponding second fixing holes 320, the first fastener 410 sequentially passes through the first fixing holes 1011 and the second fixing holes 320 and is fastened, so that the workpiece body 101 can be firmly installed in the accommodating groove 310, loosening or displacement is avoided, the stability of the integral structure is improved, and the assembly mode is the same as the fixing mode of the coupling arm in the circuit breaker module, so that the stress state of the coupling arm in the test tool is more consistent with the actual use working condition, and the accuracy of the test result is improved.

Optionally, the fixing base 300 is provided with a receiving groove 310, at least part of the workpiece body 101 is located in the receiving groove 310, and the workpiece body 101 can be effectively prevented from being offset or swaying in the testing process by embedding the workpiece body 101 into the receiving groove 310, so that the stability of the overall structure is improved.

Optionally, as shown in fig. 3 and fig. 4, a boss 1012 is disposed at the bottom of the workpiece body 101, a positioning slot 311 is disposed at the bottom wall of the accommodating slot 310, the boss 1012 can be inserted into the positioning slot 311, so that the coupling arm can be rapidly positioned, and the mounting error is reduced, and after the boss 1012 is inserted into the positioning slot 311, a jogged structure is formed, so that the horizontal movement of the coupling arm in the accommodating slot 310 is effectively limited, and the reliability of the test result is ensured. In this embodiment, the insertion design of the boss 1012 and the positioning slot 311 is simple and intuitive, and an operator can complete the preliminary fixing by only inserting the boss 1012 into the positioning slot 311, so that the installation steps are simplified, and the installation efficiency of the coupling arm is improved.

Optionally, the first fastener 410 in this embodiment is a bolt, so that the fixing manner is more reliable, and the engagement of the boss 1012 and the positioning slot 311 ensures that the coupling arm cannot be loosened during the testing process.

Optionally, the fastening assembly 400 includes a second fastening member 420, a countersink 330 is disposed on a side of the fixing base 300 facing away from the accommodating groove 310, the second fastening member 420 passes through a bottom wall of the countersink 330 to be in threaded connection with the workpiece body 101, and the test fixture can truly reproduce the connection mode of the coupling arm in the circuit breaker through such design, so as to provide more accurate performance evaluation, and the second fastening member 420 ensures that the connection between the fixing base 300 and the coupling arm is more secure and reliable, and enhances the stability of connection.

In this embodiment, the diapire of heavy groove 330 is equipped with dodges hole 331, is equipped with screw hole 1013 on the boss 1012, and the second fastening is tight, and second fastener 420 is the bolt, and the bolt passes dodges hole 331 and stretches into in the screw hole 1013 with coupling arm threaded connection for coupling arm installation and dismantlement easy and simple to handle, reduced assembly time, improved assembly efficiency.

Optionally, the test fixture further includes a third limiting member 800, and the fixing base 300 is detachably connected to the fixing block 600 through the third limiting member 800. Specifically, as shown in fig. 2, 3 and 4, the fixing block 600 is provided with a third slot 610 and a third pin hole 620 radially arranged along the third slot 610, the bottom of the fixing seat 300 is provided with a fixing portion 340 in a protruding manner, the radial direction of the fixing portion 340 is provided with a third through hole 341, at least part of the fixing portion 340 is inserted into the third slot 610, the third pin hole 620 is coaxially opposite to the third through hole 341, the third limiting member 800 is arranged through the third pin hole 620 and the third through hole 341 in a penetrating manner so as to connect the fixing seat 300 with the fixing block 600, the third limiting member 800 is designed to facilitate the rapid disassembly of the fixing seat 300, the steps of assembling and disassembling the fixing seat 300 are greatly simplified, the time and labor are saved, and the subsequent maintenance and the component replacement are facilitated.

Optionally, the arc transition structure 350 is disposed at the connection between the fixing portion 340 and the fixing base 300, so as to reduce stress concentration, improve strength of the fixing base 300, and prolong service life of the fixing base 300.

Optionally, the diameter of the first limiting member 200 is D1, the diameter of the second limiting member 700 is D2, and the diameter of the third limiting member 800 is D3, where d2=d3 > D1, so that the strength of the second limiting member 700 and the third limiting member 800 on the test power device is ensured to be greater than that of the first limiting member 200 on the connecting arm, and the component breakage on the test power device in the test process can be avoided, thereby improving the stability and reliability of the test power device. In this embodiment, the first limiting member 200, the second limiting member 700 and the third limiting member 800 are respectively a first pin, a second pin and a third pin, and the pin has a simple structure, is convenient to install, and can effectively bear shear load.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the utility model. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims

1. A testing fixture, mounted on a testing power device, for connecting a workpiece (10) to be tested, the testing power device comprising a moving end and a fixed end, the workpiece (10) to be tested comprising a workpiece body (101) and a connector (102), characterized in that the testing fixture comprises:

The connector (100) is connected to the mobile end at one end and has a first slot (111) at the other end, at least part of the connector (102) can be inserted into the first slot (111);

A first limiting member (200) is used to limit the connector (102) within the first slot (111);

A fixing base (300) is connected to the fixing end;

Fastening assembly (400) for fastening both sides of the workpiece body (101) and the side of the workpiece body (101) away from the connector (102) to the fixing base (300).

2. The test fixture according to claim 1, characterized in that the connector (100) includes a first column (110), the first slot (111) is disposed on the first column (110), the first column (110) is provided with a first through hole (112) communicating with the first slot (111) in the radial direction, the connector (102) is provided with a first pin hole (1021) in the radial direction, the first through hole (112) and the first pin hole (1021) are coaxially aligned, and the first limiting member (200) passes through the first through hole (112) and the first pin hole (1021).

3. The test fixture according to claim 2, characterized in that the connecting member (100) further includes a second column (120), one end of the second column (120) is connected to the first column (110), and the other end is connected to the movable end, the diameter of the second column (120) is smaller than the diameter of the first column (110), and a first rounded corner structure (130) is provided at the connection between the second column (120) and the first column (110).

4. The test fixture according to claim 1, characterized in that the fastening assembly (400) includes a first fastener (410), the workpiece body (101) is provided with a first fixing hole (1011) on both sides, the fixing seat (300) is provided with a second fixing hole (320) on both sides, the first fixing hole (1011) can be coaxially aligned with its corresponding second fixing hole (320), and the first fastener (410) passes through the first fixing hole (1011) and the second fixing hole (320) in sequence and is fastened.

5. The test fixture according to claim 1, characterized in that the fixed base (300) is provided with a receiving groove (310), and at least a portion of the workpiece body (101) is located in the receiving groove (310).

6. The test fixture according to claim 5, characterized in that the bottom of the workpiece body (101) is provided with a boss (1012), the bottom wall of the receiving groove (310) is provided with a positioning groove (311), and the boss (1012) can be inserted into the positioning groove (311).

7. The test fixture according to claim 5, wherein the fastening assembly (400) includes a second fastener (420), the fixing seat (300) is provided with a recess (330) on the side opposite to the receiving groove (310), and the second fastener (420) passes through the bottom wall of the recess (330) and is threadedly connected to the workpiece body (101).

8. The test fixture according to any one of claims 1-7, characterized in that the test fixture further includes a second limiting member (700) and a third limiting member (800), the second limiting member (700) being used to detachably connect the connecting member (100) to the moving end of the test power device, and the third limiting member (800) being used to detachably connect the fixed seat (300) to the fixed end of the test power device.

9. The test fixture according to claim 8, wherein the diameter of the first limiting member (200) is D1, the diameter of the second limiting member (700) is D2, and the diameter of the third limiting member (800) is D3, wherein D2 = D3 > D1.

10. A test power device, characterized in that it includes the test fixture as described in any one of claims 1-9, wherein the moving end of the test power device is provided with a moving block (500), the fixed end of the test power device is provided with a fixed block (600), the connecting member (100) is connected to the moving block (500), and the fixed seat (300) is disposed on the fixed block (600).