A compression strength testing machine for glass insulators

Abstract

The application relates to a compression strength testing machine for glass insulators, and belongs to the technical field of glass insulator testing. The machine comprises a test cabinet, a base for placing the glass insulator arranged in the test cabinet, a test head arranged opposite to the base, a driving mechanism for driving the base and the test head to move oppositely, a test cavity and a driving cavity formed by spacing the inner cavity of the test cabinet, the driving mechanism arranged in the driving cavity, the base arranged in the test cavity, the moving end of the driving mechanism connected with the base, the base connected with a displacement sensor through a connecting piece fixed on the side of the base, and a load sensor arranged at the test head. The compression strength testing machine for glass insulators of the application realizes the test of the compression strength of the glass insulator on the surface of the base by oppositely arranging the base and the test head and controlling the relative movement of the base and the test head. The positioning groove for placing the glass insulator is arranged at the center of the base, so that the stability of the glass insulator during the test is improved.

Description

Technical Field

[0001] This utility model relates to the field of glass insulator testing technology, specifically to a glass insulator compressive strength testing machine. Background Technology

[0002] Glass insulators are insulating devices primarily made of glass. They possess excellent insulation properties and mechanical strength, maintaining a stable insulating state even under high-voltage conditions. Unlike ceramic insulators and insulators made of other materials, glass insulators, while exhibiting high mechanical strength, are also relatively brittle due to their material composition. Therefore, the compressive strength test is a crucial testing item for glass insulators.

[0003] For compressive strength testing of glass insulators, the common approach in existing technologies is to apply pressure to the glass insulator after it is fixed, and then obtain data such as the compressive pressure and deformation during breakage after the insulator breaks. Examples include the technical solutions described in Chinese Utility Model Patent Application No. 202223090637.3 (filed November 18, 2022), entitled "A Deformation Detection Device for Glass Parts"; Chinese Invention Patent Application No. 202110586556.3 (filed May 27, 2021), entitled "A Quality Inspection Device for Glass Insulators"; and Chinese Invention Patent Application No. 202510048647.X (filed January 13, 2025), entitled "A Data Acquisition Auxiliary Device".

[0004] However, the applicant of this application wishes to design a novel technical solution for the compressive strength test of glass insulators based on existing technology. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a glass insulator compressive strength tester that realizes the compressive strength test of the glass insulator on the base surface by using a base and a test head that are arranged relatively to each other and controlling the relative movement of the base and the test head.

[0006] The technical solution adopted by this utility model to solve its technical problem is as follows: the compressive strength testing machine for glass insulators includes a test cabinet, a base for placing glass insulators and a test head arranged opposite to the base, and a drive mechanism for driving the base and the test head to move relative to each other. The characteristic is that the inner cavity of the test cabinet is divided into a test cavity and a drive cavity, the drive mechanism is arranged in the drive cavity, the base is arranged in the test cavity, the moving end of the drive mechanism is connected to the base, the base is connected to a displacement sensor through a side-fixed connector, and the load sensor is installed at the test head.

[0007] Preferably, a connecting sleeve is installed at the top of the test chamber, and the test head is detachably installed inside the connecting sleeve with the test head facing downwards towards the base.

[0008] Preferably, the bottom of the connecting sleeve has an inner cavity for accommodating the test head, and the test head is fixed inside the connecting sleeve by a connecting pin that passes through the side of the connecting sleeve.

[0009] Preferably, a connecting seat is provided at the top of the test chamber, and a connecting sleeve is installed at the bottom of the connecting seat via a load sensor.

[0010] Preferably, the driving mechanism is a hydraulic cylinder fixed in the driving chamber, and the piston rod of the hydraulic cylinder enters the test chamber and is fixed to the bottom of the base.

[0011] Preferably, a positioning groove for placing glass insulators is provided on the surface of the base.

[0012] Preferably, the connector includes a connecting plate horizontally fixed to the side of the base, and a measuring rod fixed to the end of the connecting plate. The measuring rod extends downward into the drive cavity and is connected to a displacement sensor disposed in the drive cavity.

[0013] Preferably, the displacement sensor is a pull-string displacement sensor, which is fixed to the bottom of the measuring rod, and the pull-string leading out from the pull-string displacement sensor is fixed to the bottom surface of the drive cavity.

[0014] Compared with the prior art, the beneficial effects of this utility model are: The compressive strength testing machine for glass insulators in this application tests the compressive strength of the glass insulators on the base surface by using a base and a test head that are positioned opposite each other and controlling the relative movement of the base and the test head.

[0015] A positioning groove for placing glass insulators is provided at the center of the base, which improves the stability of glass insulators during testing. Attached Figure Description

[0016] Figure 1 This is a front view of a glass insulator compressive strength testing machine.

[0017] Figure 2 This is a schematic diagram of the internal structure of a glass insulator compressive strength testing machine.

[0018] Figure 3 for Figure 2 Sectional view along the AA direction.

[0019] The components are: 1. Lifting ring; 2. Support column; 3. Upper cabinet door; 4. Test chamber; 5. Partition; 6. Lower cabinet door; 7. Drive chamber; 8. Test head; 9. Base; 10. Hydraulic cylinder; 11. Displacement sensor; 12. Measuring rod; 13. Connecting plate; 14. Positioning groove; 15. Connecting pin; 16. Load sensor; 17. Connecting sleeve; 18. Connecting seat. Detailed Implementation

[0020] Figures 1-3 This is the preferred embodiment of the present invention, which is described below in conjunction with the appendix. Figures 1-3 The present invention will be further described below.

[0021] like Figure 1 As shown, a compressive strength testing machine for glass insulators (hereinafter referred to as the compressive strength testing machine) includes a vertical cabinet. A partition 5 is provided in the middle of the cabinet, dividing the inner cavity of the cabinet into an upper testing chamber 4 and a lower driving chamber 7. The front end of the testing chamber 4 is closed by an openable upper cabinet door 3, and the front end of the driving chamber 7 is closed by an openable lower cabinet door 6. Multiple lifting rings 1 are provided at the top of the cabinet to facilitate lifting the compressive strength testing machine. Figures 2-3 At the four corners of partition 5, a support column 2 is erected, and the top plate of the cabinet is horizontally fixed on the top of the four support columns 2. Hanging rings 1 are arranged at the four corners of the upper surface of the top plate.

[0022] A hydraulic cylinder 10 is installed inside the drive chamber 7, and a hydraulic station (not shown in the figure) is installed on the outside of the cabinet to provide hydraulic oil for the hydraulic cylinder 10. The cylinder body of the hydraulic cylinder 10 is fixed to the bottom surface of the partition 5. The piston rod of the hydraulic cylinder 10 extends upward through the partition 5 into the test chamber 4, and a base 9 is fixed to the end of the piston rod. During testing, the glass insulator (not shown in the figure) is placed on the surface of the base 9. To improve the stability of the glass insulator during testing, a positioning groove 14 for placing the glass insulator is provided at the center of the base 9.

[0023] A connecting seat 18 is fixed to the lower surface of the cabinet top plate, and a connecting sleeve 17 is fixed to the lower surface of the connecting seat 18. A load sensor 16 is fixed to the bottom of the connecting seat 18 via the top of the connecting sleeve 17. A mounting hole is opened from the bottom of the connecting sleeve 17 upwards, and a test head 8 is set in the mounting hole. A connecting pin 15 is horizontally inserted into the side of the connecting sleeve 17, and the test head 8 is detachably arranged in the connecting sleeve 17 via the connecting pin 15. After the test head 8 is fixed, it faces downwards and is directly aligned with the positioning groove 14 at the center of the base 9.

[0024] A connecting plate 13 is horizontally connected to the bottom of the base 9. The outer end of the connecting plate 13 extends horizontally to one side of the base 9. A measuring rod 12 is fixed to the lower part of the outer end of the connecting plate 13. The bottom of the measuring rod 12 passes downward through the partition 5 and extends to the lower part of the drive cavity 7. A displacement sensor 11 is fixed to the bottom of the measuring rod 12. The displacement sensor 11 is implemented using a pull-string displacement sensor known in the art. The body of the displacement sensor 11 is fixed to the bottom of the measuring rod 12, and the pull-string leading out from the pull-string displacement sensor is fixed to the bottom surface of the drive cavity 7. The signal output terminals of the load sensor 16 and the displacement sensor 11 are respectively connected to an external controller (not shown in the figure).

[0025] The specific working process and working principle are as follows: After opening the upper cabinet door 3, place the glass insulator to be tested on the surface of the base 9 and make the bottom of the glass insulator fit into the positioning groove 14 on the surface of the base 9, and then close the upper cabinet door 3.

[0026] Hydraulic oil is supplied to cylinder 10 via an external hydraulic station, driving the piston rod of cylinder 10 to move. As the piston rod moves, it causes base 9 to rise within test chamber 4. Simultaneously, displacement sensor 11 detects the rising distance of base 9. When base 9 brings the glass insulator into contact with test head 8, the pressure value measured by load sensor 16 begins to rise. At the instant the glass insulator breaks under pressure, the pressure value measured by load sensor 16 drops instantaneously. This provides the pressure experienced by the glass insulator at the moment of breakage. Simultaneously, the controller records the displacement measured by displacement sensor 11 at both the initial rise and the instantaneous drop in pressure value from load sensor 16, thus obtaining the deformation of the glass insulator from the start of compression until breakage.

[0027] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from its technical solution shall still fall within the protection scope of this utility model.

Claims

1. A compressive strength testing machine for glass insulators, comprising a test cabinet, a base (9) for placing glass insulators and a test head (8) disposed opposite to the base (9) within the test cabinet, and a drive mechanism for driving the base (9) and the test head (8) to move relative to each other, characterized in that: The inner cavity of the test cabinet is divided into a test cavity (4) and a drive cavity (7). The drive mechanism is located in the drive cavity (7), and the base (9) is located in the test cavity (4). The moving end of the drive mechanism is connected to the base (9). The base (9) is connected to the displacement sensor (11) through a side-fixed connector. The load sensor (16) is installed at the test head (8).

2. The compressive strength testing machine for glass insulators according to claim 1, characterized in that: A connecting sleeve (17) is installed on the top of the test chamber (4), and the test head (8) is detachably installed in the connecting sleeve (17), with the test head (8) facing downwards towards the base (9).

3. The compressive strength testing machine for glass insulators according to claim 2, characterized in that: The bottom of the connecting sleeve (17) has an inner cavity for accommodating the test head (8), and the test head (8) is fixed inside the connecting sleeve (17) by a connecting pin (15) that passes through the side of the connecting sleeve (17).

4. The compressive strength testing machine for glass insulators according to claim 2 or 3, characterized in that: A connecting seat (18) is provided at the top of the test chamber (4), and a connecting sleeve (17) is installed at the bottom of the connecting seat (18) via a load sensor (16).

5. The compressive strength testing machine for glass insulators according to claim 1, characterized in that: The driving mechanism is a hydraulic cylinder (10) fixed in the driving chamber (7). The piston rod of the hydraulic cylinder (10) enters the test chamber (4) and is fixed at the bottom of the base (9).

6. The compressive strength testing machine for glass insulators according to claim 1, characterized in that: A positioning groove (14) for placing glass insulators is provided on the surface of the base (9).

7. The compressive strength testing machine for glass insulators according to claim 1, characterized in that: The connector includes a connecting plate (13) horizontally fixed to the side of the base (9), and a measuring rod (12) is fixed at the end of the connecting plate (13). The measuring rod (12) extends downward into the drive cavity (7) and is connected to a displacement sensor (11) disposed in the drive cavity (7).

8. The compressive strength testing machine for glass insulators according to claim 7, characterized in that: The displacement sensor (11) is a pull-rope displacement sensor. The pull-rope displacement sensor is fixed at the bottom of the measuring rod (12), and the pull rope led out from the pull-rope displacement sensor is fixed at the bottom surface of the drive cavity (7).

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