Drop test device

Abstract

The utility model discloses a drop test device, which comprises a sample mounting and lifting unit, a sample fixing unit and a drop receiving unit, the mounting and lifting unit can move and level, a tested product sample is detachably mounted on the sample fixing unit, the sample fixing unit is movably mounted on the mounting and lifting unit, and the drop receiving unit is mounted on the mounting and lifting unit. The sample fixing unit is controlled to release the tested product sample, so that the tested product sample freely falls into the falling receiving unit. According to the utility model, the drop test can be carried out on products such as a point-type temperature-sensitive fire detector and a manual fire alarm button, free drop of a tested sample can be realized, drop height control, repeatability and consistency are good, the device is simple to operate, and test efficiency can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of fire protection product detection, in particular to a drop test device. Background Art

[0002] The revised national standards "Point-type heat-sensitive fire detectors" and "Manual fire alarm buttons" have newly added drop tests. The drop test simulates the free fall of the test sample from a certain installation height to the test ground to verify the test sample's anti-drop performance.

[0003] The drop test requires that the product be installed in its normal manner (inverted installation, i.e. the base faces upward and the front faces downward) and fall freely from a height of 1.5 m to the test ground, to assess the degree of damage to the product when it falls freely with the top face downward to the test ground; the test samples may have shapes similar to round or square, but the shapes of different products are different and the heights of the products themselves are also different, so the drop height needs to be adjusted according to the height of the product itself before the test. Currently, there is no test device that meets the height requirements and hand-gripping requirements of this test. Manual adjustment of the test product height will result in large deviations and inaccurate test results. Utility Model Content

[0004] In view of the above shortcomings and deficiencies, the utility model provides a drop test device that can perform drop tests on products such as point-type temperature-sensitive fire detectors and manual fire alarm buttons in a repeatable, consistent, scientific and efficient manner.

[0005] In order to achieve the above-mentioned purpose, the main technical solution adopted by the utility model is a drop test device, including a sample installation lifting unit, a sample fixing unit, and a drop receiving unit. The installation lifting unit is movable and leveled, and the sample of the product to be tested is detachably installed on the sample fixing unit. The sample fixing unit is movably installed on the installation lifting unit. The sample of the product to be tested is released by controlling the sample fixing unit, so that the sample of the product to be tested falls freely into the drop receiving unit.

[0006] The sample installation lifting unit includes a falling platform, a column and a lifting motor. The column is fixedly installed on the falling platform, and the lifting motor is fixedly installed on the upper end of the column. The output shaft of the lifting motor is arranged parallel to the column and faces the falling platform. A cylinder is slidably connected to the output shaft of the lifting motor.

[0007] The sample fixing unit includes a height positioning platform, which is installed below the output shaft of the lifting motor through a rotating shaft. The height positioning platform can rotate horizontally by an angle, and the distance between the upper end surface of the height positioning platform and the falling platform is 1.5 meters.

[0008] The sample fixing unit also includes a gripper, which is detachably mounted on the telescopic end of the cylinder through a nut. The gripper's clamping surface is suitable for round product samples or square product samples. The gripper is controlled by a control switch.

[0009] The drop receiving unit is fixedly mounted on a drop platform on which a lifting unit is mounted. The drop receiving unit comprises a circular stainless steel bottom plate, the periphery of which is provided with a stainless steel wire braided plate, which together with the bottom plate form a round barrel, and the center of the bottom plate is located directly below the sample of the product to be tested.

[0010] The thickness of the bottom plate is not less than 12 mm, and the diameter of the bottom plate is not less than 50 cm; the height of the stainless steel wire woven plate is not less than 50 cm, the mesh spacing of the stainless steel wire woven plate is not greater than 10 mm, and the diameter of the stainless steel wire is not less than 2 mm.

[0011] A universal wheel is arranged below the installation lifting unit, and a leveling member is arranged below the drop platform of the installation lifting unit.

[0012] The utility model has the following beneficial effects and advantages:

[0013] The utility model can carry out drop tests on products such as point-type temperature-sensitive fire detectors and manual fire alarm buttons, can realize the free fall of the tested samples and control the drop height, has good repeatability and consistency, is easy to operate, and can improve test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the structure of the utility model from another angle;

[0016] Figure 3 This is a schematic diagram of the hand gripping structure of a square product of the utility model;

[0017] Figure 4 This is a schematic diagram of the circular product gripper structure of the utility model.

[0018] In the figure: 1. Drop platform; 2. Column; 3. Lifting motor; 4. Cylinder; 5. Clamp; 5-1. Clamp for square products; 5-2. Clamp for round products; 6. Height positioning platform; 7. Drum; 7-1. Bottom plate; 7-2. Stainless steel woven plate; 8. Universal wheel; 9. Leveling piece; 10-1. Square products; 10-2. Round products. DETAILED DESCRIPTION

[0019] The utility model is further described below in conjunction with the accompanying drawings of the specification. Figure 1As shown, the utility model provides a drop test device, including a sample installation lifting unit, a sample fixing unit, and a drop receiving unit. The installation lifting unit is movable and leveled, and the sample of the product to be tested is detachably installed on the sample fixing unit. The sample fixing unit is movably installed on the installation lifting unit. The sample of the product to be tested is released by controlling the sample fixing unit, so that the sample of the product to be tested falls freely into the drop receiving unit.

[0020] The sample installation lifting unit includes a dropping platform 1, a column 2 and a lifting motor 3. The column 2 is fixedly installed on the dropping platform 1, and the lifting motor 3 is fixedly installed on the upper end of the column 2. The output shaft of the lifting motor 3 is arranged parallel to the column 2 and faces the dropping platform 1. The output shaft of the lifting motor 3 is slidably connected with a cylinder 4.

[0021] The sample fixing unit includes a height positioning platform 6, which is installed on the column 2 below the output shaft of the lifting motor 3 through a rotating shaft. The height positioning platform 6 can rotate horizontally by an angle, and the upper end surface of the height positioning platform 6 is 1.5 meters away from the falling platform 1.

[0022] The sample fixing unit further comprises a gripper 5, which is detachably mounted on the telescopic end of the cylinder 4 through a nut. The gripper 5 has a clamping surface suitable for round products 10-2 (such as Figure 4 as shown) or square product 10-1 (as shown Figure 3 As shown), the gripper 5 is controlled by a control switch.

[0023] The drop receiving unit is fixedly installed on the drop platform 1 on which the lifting unit is installed, and the drop receiving unit includes a circular stainless steel bottom plate 7-1, and a stainless steel wire woven plate 7-2 is arranged on the periphery of the bottom plate 7-1 to form a barrel 7, and the center of the bottom plate 7-1 is located directly below the product sample to be tested; in this embodiment, the thickness of the bottom plate 7-1 is 12 mm, and the diameter of the bottom plate 7-1 is 50 cm; the height of the stainless steel wire woven plate 7-2 is 50 cm, the mesh spacing of the stainless steel wire woven plate 7-2 is 10 mm, and the diameter of the stainless steel wire is 2 mm.

[0024] A universal wheel 8 is provided below the installation lifting unit, and a leveling member 9 (such as Figure 2 as shown).

[0025] When in use, the entire test device is moved to the specified position through the universal wheel 8, and the drop platform 1 is leveled to a horizontal level through the leveling piece 9. The square product clamp 5-1 or the round product clamp 5-2 is selected according to the shape of the product to be tested, and the tested surface of the product is set downward. The clamp 5 is used to fix the bottom of the product to be tested, and then the height positioning platform 6 is rotated to the bottom of the product to be tested. The lifting motor 3 is controlled to make the tested surface of the product to be tested close to the upper end surface of the height positioning platform 6 (that is, the tested surface of the product to be tested is 1.5 meters away from the drop platform). When starting the test, the height positioning platform 6 is first rotated to leave the tested product, and the control switch is started to make the clamp 5 release the tested product, and the tested product falls freely into the barrel 7. Check whether the tested product is damaged and complete the drop test.

[0026] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A drop test device, characterized in that: It includes a sample installation lifting unit, a sample fixing unit, and a drop receiving unit. The installation lifting unit is movable and levelable, and the sample of the product to be tested is detachably installed on the sample fixing unit. The sample fixing unit is movably installed on the installation lifting unit. The sample of the product to be tested is released by controlling the sample fixing unit, so that the sample of the product to be tested falls freely into the drop receiving unit.

2. A drop test device according to claim 1, characterized in that: The sample installation lifting unit includes a falling platform, a column and a lifting motor. The column is fixedly installed on the falling platform, and the lifting motor is fixedly installed on the upper end of the column. The output shaft of the lifting motor is arranged parallel to the column and faces the falling platform. A cylinder is slidably connected to the output shaft of the lifting motor.

3. A drop test device according to claim 2, characterized in that: The sample fixing unit includes a height positioning platform, which is installed below the output shaft of the lifting motor through a rotating shaft. The height positioning platform can rotate horizontally by an angle, and the distance between the upper end surface of the height positioning platform and the falling platform is 1.5 meters.

4. A drop test device according to claim 2, characterized in that: The sample fixing unit also includes a gripper, which is detachably mounted on the telescopic end of the cylinder through a nut. The gripper's clamping surface is suitable for round product samples or square product samples. The gripper is controlled by a control switch.

5. A drop test device according to claim 1, characterized in that: The drop receiving unit is fixedly mounted on a drop platform on which a lifting unit is mounted. The drop receiving unit comprises a circular stainless steel bottom plate, the periphery of which is provided with a stainless steel wire braided plate, which together with the bottom plate form a round barrel, and the center of the bottom plate is located directly below the sample of the product to be tested.

6. A drop test device according to claim 5, characterized in that: The thickness of the bottom plate is not less than 12 mm, and the diameter of the bottom plate is not less than 50 cm; the height of the stainless steel wire woven plate is not less than 50 cm, the mesh spacing of the stainless steel wire woven plate is not greater than 10 mm, and the diameter of the stainless steel wire is not less than 2 mm.

7. A drop test device according to claim 1, characterized in that: A universal wheel is arranged below the installation lifting unit, and a leveling member is arranged below the drop platform of the installation lifting unit.

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