Falling ball impact detection device

Abstract

The utility model provides a falling ball impact detection device. The falling ball impact detection device comprises a horizontal platform, a supporting device and a steel ball, the supporting device is perpendicular to the horizontal platform, a rotating shaft is arranged at the bottom of the supporting device, a through hole is formed in the horizontal platform, and a threaded hole is formed in the side face, close to the through hole, of the horizontal platform and communicated with the through hole. Bolts are arranged in the threaded holes and inserted into the through holes to fix the supporting device. The top of the supporting device is fixedly connected with an adsorption platform, the adsorption platform is fixedly connected with a magnetic adsorption device, and the steel balls are magnetically adsorbed to the lower surface of the adsorption platform through the magnetic adsorption device. According to the device, the direction of the adsorption platform is adjusted through rotation of the supporting device, so that the steel balls can be located at different positions above the horizontal platform, fixing and falling of the steel balls are controlled by controlling the magnetic adsorption device, and falling ball impact detection is completed. The device has the advantages of being accurate in measurement, simple in structure and convenient to operate by detection personnel.

Description

Technical Field

[0001] The present application relates to the technical field of falling ball impact detection, and in particular to a falling ball impact detection device. Background Art

[0002] Sodium bentonite waterproof blanket is an environmentally friendly ecological composite anti-seepage material. It is composed of two layers of geosynthetics sandwiched with high-quality anti-seepage natural sodium bentonite. In recent years, sodium bentonite waterproof blanket has been widely used in rail transit projects, mainly as an anti-seepage liner laid in key parts such as the bottom plate, side wall, and top plate of underground projects. During the construction of sodium bentonite waterproof blanket, machinery and tools will inevitably cause mechanical impact on the waterproof blanket product. The falling ball impact project is an important indicator for evaluating the impact resistance of the waterproof blanket.

[0003] According to the provisions of GB / T 35470-2017 "Natural Sodium Bentonite Waterproof Blanket for Rail Transit Engineering" on the drop ball impact test, in the drop ball impact test, a 500g steel ball needs to be dropped from a height of 1m to impact any 5 different parts of the waterproof blanket surface once each to observe whether there are peeling, holes, tears and other damage phenomena on the surface of the waterproof blanket. The general test method requires the experimenter to lift the steel ball to 1m and then let go to let the steel ball fall freely. This test method is affected by the operator's operating level, and it is difficult to ensure that the height of the drop ball impact is maintained at 1m, resulting in large errors in the test results, which in turn affects the evaluation of the quality of the waterproof blanket. Utility Model Content

[0004] The present application provides a falling ball impact detection device to solve the problem that the height and drop of a steel ball are manually controlled in the current falling ball impact detection, and the detection result has a large error, which affects the quality assessment of the waterproof blanket.

[0005] The present application provides a falling ball impact detection device, comprising a horizontal platform, a supporting device and a steel ball; the supporting device is perpendicular to the horizontal platform, a rotating shaft is arranged at the bottom of the supporting device, a through hole is opened on the horizontal platform, a threaded hole is opened on the side of the horizontal platform close to the through hole, and the threaded hole is connected to the through hole; a bolt is arranged in the threaded hole, and the bolt is inserted into the through hole to fix the supporting device; an adsorption platform is fixedly connected to the top of the supporting device, and a magnetic absorption device is fixedly connected to the adsorption platform, and the steel ball is magnetically adsorbed to the lower surface of the adsorption platform through the magnetic absorption device.

[0006] In a feasible implementation, the distance between the bottom point of the steel ball surface and the top surface of the sample placed on the upper surface of the horizontal platform is 1 meter.

[0007] In a feasible implementation, the length of the rotating shaft is 90 mm ≤ L ≤ 110 mm, and the height H of the horizontal platform is greater than or equal to the length L of the rotating shaft.

[0008] In a feasible implementation, the magnetic attraction device is a first magnet, a groove is provided on the steel ball, and a second magnet is installed in the groove with interference fit; the first magnet is attached to the upper surface of the adsorption platform, the polarity of the first magnet in the direction close to the adsorption platform is opposite to the polarity of the second magnet in the direction close to the adsorption platform, and the steel ball is magnetically adsorbed on the lower surface of the adsorption platform.

[0009] In a feasible implementation, the cross-section of the adsorption platform is U-shaped.

[0010] In a feasible implementation, the magnetic attraction device is an electromagnet, which is arranged on the upper surface of the adsorption platform along the length direction of the adsorption platform. A second magnet is embedded in the steel ball. The polarity of the second magnet in the direction close to the adsorption platform is opposite to the polarity of the electromagnet in the direction close to the adsorption platform. The steel ball is magnetically adsorbed on the lower surface of the adsorption platform.

[0011] In a feasible implementation, a control box is provided on the adsorption platform, a magnetic attraction circuit is provided in the control box, and the magnetic attraction circuit is connected to a power supply and a switch.

[0012] In a feasible implementation, the horizontal platform is square.

[0013] In a feasible implementation, the side length of the horizontal platform is ; the length of the adsorption platform is ; and the width of the adsorption platform is .

[0014] In a feasible implementation, the horizontal platform and the supporting device are made of steel.

[0015] The embodiment of the present application provides a falling ball impact detection device, which is provided with a horizontal platform, a supporting device and a steel ball; the supporting device is perpendicular to the horizontal platform, a rotating shaft is provided at the bottom of the supporting device, an adsorption platform is fixedly connected to the top of the supporting device, a magnetic device is fixedly connected to the adsorption platform, and the steel ball is magnetically adsorbed on the lower surface of the adsorption platform through the magnetic device. The device can adjust the direction of the adsorption platform by rotating the supporting device, so that the steel ball can be located at different positions above the horizontal platform, and the fixing and falling of the steel ball can be controlled by controlling the magnetic device. For falling ball impact detection, the device has accurate measurement, simple structure, and convenient operation by the detection personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solution of the present application, the drawings required for use in the embodiments are briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0017] Figure 1 It is a schematic diagram of the structure of a falling ball impact detection device provided by the present application;

[0018] Figure 2 It is a schematic diagram of the installation of the support device and the horizontal platform in the falling ball impact detection device provided by the present application;

[0019] Figure 3 It is a schematic diagram of the installation of the electromagnet of the falling ball impact detection device provided by the present application;

[0020] Figure 4 It is a schematic diagram of the steel ball structure;

[0021] Figure 5 It is the circuit diagram of magnetic attraction circuit.

[0022] Description of reference numerals:

[0023] 1-horizontal platform; 11-through hole; 12-threaded hole; 13-bolt; 2-support device; 21-rotating shaft; 3-adsorption platform; 4-steel ball; 41-groove; 5-first magnet; 6-second magnet; 7-electromagnet; 8-control box. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work should fall within the scope of protection of the present application.

[0025] Sodium-based bentonite waterproof blanket is an environmentally friendly ecological composite anti-seepage material. In recent years, sodium-based bentonite waterproof blanket has been widely used in rail transit projects, mainly as an anti-seepage lining laid in key parts such as the bottom plate, side wall, and top plate of underground projects. During the construction process of sodium-based bentonite waterproof blanket, machinery and tools will inevitably cause mechanical impact on the waterproof blanket product. The drop ball impact project is an important indicator for evaluating the impact resistance of the waterproof blanket. According to the provisions of the drop ball impact test in GB / T 35470-2017 "Natural Sodium-based Bentonite Waterproof Blanket for Rail Transit Engineering", in the drop ball impact test, a 500g steel ball needs to be dropped from a height of 1m to impact any 5 different parts of the waterproof blanket surface once each to observe whether there is peeling, holes, tearing, and other damage on the surface of the waterproof blanket.

[0026] The general detection method requires the experimenter to lift the steel ball to 1m, then let go and let the steel ball fall freely. This detection method is affected by the experimenter's operating level, and it is difficult to ensure that the height of the falling ball impact is maintained at 1m, resulting in large errors in the detection results, which in turn affects the evaluation of the quality of the waterproof blanket. The present application provides a falling ball impact detection device, which is provided with a horizontal platform, a supporting device, an adsorption platform and a steel ball; the device can adjust the direction of the adsorption platform by rotating the supporting device, so that the steel ball can be located at different positions above the horizontal platform, and the fixing and falling of the steel ball can be controlled by controlling the magnetic absorption device. The falling ball impact detection device has the advantages of accurate measurement, simple structure, and convenient operation for detection personnel.

[0027] The specific structure of the falling ball impact detection device provided in the present application is described in detail below with reference to the accompanying drawings.

[0028] See also Figure 1 and Figure 2 A falling ball impact detection device provided in this embodiment includes a horizontal platform 1, a supporting device 2 and a steel ball 4; the supporting device 2 is perpendicular to the horizontal platform 1, a rotating shaft 21 is arranged at the bottom of the supporting device 2, a through hole 11 is opened on the horizontal platform 1, a threaded hole 12 is opened on the side of the horizontal platform 1 close to the through hole 11, and the threaded hole 12 is connected to the through hole 11; a bolt 13 is arranged in the threaded hole 12, and the bolt 13 is inserted into the through hole 11 to fix the supporting device 2; an adsorption platform 3 is fixedly connected to the top of the supporting device 2, and a magnetic absorption device is fixedly connected to the adsorption platform 3, and the steel ball 4 is magnetically adsorbed on the lower surface of the adsorption platform 3 through the magnetic absorption device.

[0029] When in use, first, place the waterproof blanket to be tested on the upper surface of the horizontal platform 1, rotate the bolt 13 to move the bolt 13 away from the horizontal platform 1, and then the rotating shaft 21 can move up and down in the through hole 11 to adjust the position. When adjusted to the specified detection position, tighten the bolt 13, the rotating shaft 21 is fastened in the through hole 11, and the support device 2 is installed. When the angle of the support device 2 needs to be adjusted, it is also done by screwing the bolt 13, which is easy to operate. The adsorption platform 3 is provided on the top of the support device 2, and the steel ball 4 is magnetically adsorbed on the adsorption platform 3. The magnetic adsorption connection method adsorbs the steel ball 4 at the specified detection height, replacing the manual lifting method, making the operation more reliable, improving the accuracy of the detection results, and providing an accurate basis for the quality assessment of the waterproof blanket.

[0030] In some embodiments, the distance between the bottom point of the spherical surface of the steel ball 4 and the top surface of the sample placed on the upper surface of the horizontal platform 1 is 1 meter.

[0031] The height of the support device 2 is adjusted by the bolt 13 so that the height between the bottom point of the spherical surface of the steel ball 4 and the top surface of the sample is 1m, which meets the provisions of GB / T 35470-2017 "Natural sodium-based bentonite waterproof blanket for rail transit engineering" on falling ball impact testing. For other products that need to be tested for falling ball impact, the height can be adjusted according to their own performance or relevant standards, which can also be achieved by screwing the bolt 13 and adjusting the length of the rotating shaft 21 extending into the through hole 11.

[0032] In some embodiments, the length of the rotating shaft 21 is 90 mm≤L≤110 mm, and the height H of the horizontal platform 1 is equal to the length L of the rotating shaft 21 .

[0033] For the ball impact test of the sodium bentonite waterproof blanket, the distance between the bottom surface of the adsorption platform 3 and the surface of the horizontal platform 1 is usually set to 1100±10mm, and the height of the support device 2 is 1010±10mm. The height H of the horizontal platform 1 is greater than or equal to the length L of the rotating shaft 21, and the rotating shaft 21 can be completely inserted into the through hole 11.

[0034] In some embodiments, see Figure 1 and Figure 4 The magnetic attraction device is a first magnet 5, a groove 41 is provided on the steel ball 4, and a second magnet 6 is installed in the groove 41 with interference fit; the first magnet 5 is attached to the upper surface of the adsorption platform 3, and the polarity of the first magnet 5 in the direction close to the adsorption platform 3 is opposite to the polarity of the second magnet 6 in the direction close to the adsorption platform 3, and the steel ball 4 is magnetically adsorbed on the lower surface of the adsorption platform 3.

[0035] The magnetic attraction between the first magnet 5 and the steel ball 4 allows the steel ball 4 to be conveniently adsorbed on the lower surface of the adsorption platform 3, and maintained at a height of 1m from the surface of the sample to be tested, without the need for manual lifting, which saves effort and allows the distance between the steel ball 4 and the surface of the sample to be tested to be more accurately controlled. When a falling ball impact is performed, the steel ball 4 can be controlled to fall by removing the first magnet 5, which is simple and convenient to operate. A groove 41 is provided on the steel ball 4, and the second magnet 6 is installed in the groove 41, so that the steel ball 4 is more firmly adsorbed on the lower surface of the adsorption platform 3.

[0036] In some embodiments, see Figure 1 , the cross section of the adsorption platform 3 is U-shaped.

[0037] The U-shaped adsorption platform 3 can prevent the first magnet 5 from sliding off the upper surface of the adsorption platform 3 , so that the placement of the first magnet 5 is more stable.

[0038] In some embodiments, see Figure 3 The magnetic attraction device is an electromagnet 7, which is arranged on the upper surface of the adsorption platform 3 along the length direction of the adsorption platform 3. A second magnet 6 is embedded on the steel ball 4. The polarity of the second magnet 6 in the direction close to the adsorption platform 3 is opposite to the polarity of the electromagnet 7 in the direction close to the adsorption platform 3. The steel ball 4 is magnetically adsorbed on the lower surface of the adsorption platform 3.

[0039] An electromagnet is a device that generates electromagnetic fields when electricity is applied. A conductive winding matching its power is wound around the outside of the iron core. Figure 5 When current flows through the winding, the iron core is magnetized and has an attractive force. When no current flows through the winding, the magnetism disappears. The magnetism of the electromagnet can be controlled by turning the control circuit on and off to control the adsorption and falling of the steel ball 4, which is easy to operate. The electromagnet 7 is in a bar shape and is arranged along the length direction of the adsorption platform 3, so that the steel ball 4 can be adsorbed at different positions on the adsorption platform 3, which is convenient for position adjustment.

[0040] In some embodiments, a control box 8 is provided on the adsorption platform 3, and a magnetic attraction circuit is provided in the control box 8, and the magnetic attraction circuit is connected to a power supply and a switch. The electromagnet 7 is controlled by the control box 8, and the operation is safe and convenient.

[0041] In some embodiments, the horizontal platform 1 is square. The common specification of sodium bentonite waterproof blanket is square. When monitoring products of other shapes, the horizontal platform 1 can be set to any shape according to the shape of the product to be detected.

[0042] In some embodiments, the side length of the horizontal platform 1 is 1090 mm to 1110 mm; the length of the adsorption platform 3 is 1090 mm to 1110 mm; and the width of the adsorption platform 3 is 45 mm to 55 mm.

[0043] In this embodiment, the specifications of the horizontal platform 1 and the adsorption platform 3 are set according to the common specifications of the sodium-based bentonite waterproof blanket. For other products to be tested, they can be set according to specific product specifications.

[0044] In some embodiments, the horizontal platform 1 and the supporting device 2 are made of steel to make the structure of the detection device more stable.

[0045] According to the above-mentioned technical features, the falling ball impact detection device provided in the present application adjusts the height and angle through the cooperation between the rotating shaft 21 arranged at the bottom of the supporting device 2 and the through hole 11. When in use, the steel ball 4 is fixed and dropped by the magnetic attraction device. The device has accurate measurement, simple structure, and is easy for detection personnel to operate.

[0046] It is easy to understand that those skilled in the art can combine, split, reorganize, etc. the embodiments of the present application to obtain other embodiments based on the several embodiments provided in the present application, and these embodiments do not exceed the protection scope of the present application.

[0047] The above specific implementation methods further explain in detail the purpose, technical solutions and beneficial effects of the embodiments of the present application. It should be understood that the above are only specific implementation methods of the embodiments of the present application and are not used to limit the protection scope of the embodiments of the present application. Any modifications, equivalent substitutions, improvements, etc. made on the basis of the technical solutions of the embodiments of the present application should be included in the protection scope of the embodiments of the present application.

Claims

1. A falling ball impact detection device, characterized in that: The invention comprises a horizontal platform (1), a supporting device (2) and a steel ball (4); the supporting device (2) is perpendicular to the horizontal platform (1); a rotating shaft (21) is arranged at the bottom of the supporting device (2); a through hole (11) is provided on the horizontal platform (1); a threaded hole (12) is provided on the side of the horizontal platform (1) close to the through hole (11); the threaded hole (12) is communicated with the through hole (11); a bolt (13) is arranged in the threaded hole (12); the bolt (13) is inserted into the through hole (11) to fix the supporting device (2); an adsorption platform (3) is fixedly connected to the top of the supporting device (2); the adsorption platform (3) is fixedly connected to a magnetic absorption device; the steel ball (4) is magnetically absorbed on the lower surface of the adsorption platform (3) through the magnetic absorption device.

2. A falling ball impact detection device according to claim 1, characterized in that: The distance between the bottom point of the spherical surface of the steel ball (4) and the top surface of the sample placed on the upper surface of the horizontal platform (1) is 1 meter.

3. A falling ball impact detection device according to claim 2, characterized in that: The length of the rotating shaft (21) is 90 mm ≤ L ≤ 110 mm, and the height H of the horizontal platform (1) is greater than or equal to the length L of the rotating shaft (21).

4. A falling ball impact detection device according to claim 1, characterized in that: The magnetic attraction device is a first magnet (5), a groove (41) is provided on the steel ball (4), and a second magnet (6) is installed in the groove (41) in an interference fit; the first magnet (5) is attached to the upper surface of the adsorption platform (3), and the polarity of the first magnet (5) in the direction close to the adsorption platform (3) is opposite to the polarity of the second magnet (6) in the direction close to the adsorption platform (3).

5. A falling ball impact detection device according to claim 4, characterized in that: The cross section of the adsorption platform (3) is U-shaped.

6. A falling ball impact detection device according to claim 1, characterized in that: The magnetic attraction device is an electromagnet (7), and the electromagnet (7) is arranged on the upper surface of the adsorption platform (3) along the length direction of the adsorption platform (3). The steel ball (4) is inlaid with a second magnet (6), and the polarity of the second magnet (6) in the direction close to the adsorption platform (3) is opposite to the polarity of the electromagnet (7) in the direction close to the adsorption platform (3).

7. A falling ball impact detection device according to claim 6, characterized in that: A control box (8) is arranged on the adsorption platform (3), and a magnetic attraction circuit is arranged inside the control box (8), and the magnetic attraction circuit is connected to a power supply and a switch.

8. The falling ball impact detection device according to claim 1, characterized in that: The horizontal platform (1) is square.

9. A falling ball impact detection device according to claim 8, characterized in that: The side length of the horizontal platform (1) is 1090 mm to 1110 mm; the length of the adsorption platform (3) is 1090 mm to 1110 mm; and the width of the adsorption platform (3) is 45 mm to 55 mm.

10. The falling ball impact detection device according to claim 1, characterized in that: The horizontal platform (1) and the supporting device (2) are made of steel.

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