A high-efficiency wear-resistant test device for fire hoses

Abstract

The invention discloses a high-efficiency wear-resistant testing device for fire hoses, comprising a detection frame, wherein two parallel tracks are arranged on a plane on the detection frame, an air-expanding shaft is arranged in the middle of the upper part of the detection frame, the air-expanding shaft is connected to a magnetic powder brake, a slide is arranged below the air-expanding shaft, the slide comprises a base, a bottom plate, a top plate, rollers, and a motor, the motor drives the base to move on the track, the bottom plate is fixed on the base, the top plate is arranged above the bottom plate, symmetrical bearings are arranged on opposite surfaces of the bottom plate and the top plate, the rollers are divided into two groups and arranged between upper and lower corresponding bearings, the air-expanding shaft is arranged between the two groups of rollers, the rollers are of a vertical structure, the side surfaces of the rollers are of an inwardly concave arc shape, and a plurality of protrusions are arranged on the side surfaces of the rollers. The invention has a simple structure and is easy to use, can be operated quickly, has stable dimensions, and has high accuracy in detection results.

Description

Technical Field

[0001] The invention belongs to the field of fire hose testing devices, and in particular relates to a high-efficiency wear-resistant testing device for fire hoses. Background Art

[0002] A fire hose is a hose used to transport high-pressure water or flame-retardant liquids such as foam. Its function is to divert water. A general fire hose has a double-layer structure of an inner lining layer and a surface reinforcement layer. The inner coating is arranged on the inner side of the surface reinforcement layer. The surface reinforcement layer is a tubular object woven with warp and weft threads. During use, the surface reinforcement layer rubs against the ground and is easily worn. Under the action of water pressure, the inner layer is prone to bursting from the worn area, affecting its use. Therefore, it is necessary to test the wear resistance of the hose before leaving the factory. The existing detection method is to fill the fire hose with water to expand it and then conduct the detection. On the one hand, the water filling process is relatively slow, resulting in low detection efficiency. On the other hand, after being filled with water, the fire hose still has a certain elastic deformation, which affects the accuracy of the wear resistance detection; therefore, improvement is needed. Summary of the invention

[0003] In order to solve the above problems, the present invention discloses a fire hose high-efficiency wear-resistant testing device, which has a simple structure, is easy to use, can be operated quickly, has stable dimensions, and has high detection result accuracy.

[0004] To achieve the above object, the technical solution of the present invention is as follows:

[0005] A high-efficiency wear-resistant test device for fire hoses comprises a detection frame, wherein two parallel tracks are arranged on the plane of the detection frame, an air-expanding shaft is arranged in the middle of the upper part of the detection frame, the air-expanding shaft is connected to a magnetic powder brake, a slide is arranged below the air-expanding shaft, the slide comprises a base, a bottom plate, a top plate, rollers and a motor, the motor drives the base to move on the track, the bottom plate is fixed on the base, the top plate is arranged above the bottom plate, symmetrical bearings are arranged on the opposite surfaces of the bottom plate and the top plate, the rollers are divided into two groups and arranged between corresponding upper and lower bearings, the air-expanding shaft is arranged between the two groups of rollers, the rollers are of a vertical structure, the side surfaces of the rollers are of an inwardly concave arc shape, and the side surfaces of the rollers are provided with a plurality of protrusions.

[0006] As an improvement of the present invention, the air expansion shaft is a tile-type air expansion shaft.

[0007] As an improvement of the present invention, the bottom plate and the top plate are connected by bolts.

[0008] As an improvement of the present invention, a gap is provided between the roller and the bottom plate and the top plate.

[0009] As an improvement of the present invention, the protrusion is semicircular, square, trapezoidal or triangular.

[0010] As an improvement of the present invention, each group of rollers has 2-4 rollers arranged side by side in a straight line parallel to the inflation axis.

[0011] As an improvement of the present invention, the distance between two adjacent rollers in each group of rollers is ≥ roller diameter*π.

[0012] As an improvement of the present invention, 2-5 bearings are provided on the bottom plate and the top plate.

[0013] As an improvement of the present invention, an air blowing pipe is provided on the outer side of the roller.

[0014] The beneficial effects of the present invention are:

[0015] (1) The inflatable shaft is inserted inside the fire hose. After being inflated, it expands rapidly and has stable dimensions.

[0016] (2) The curved sides of the two sets of rollers fully cover the outer side of the fire hose. The outer side of the fire hose is rubbed by the rotation of the rollers, which facilitates the rapid and accurate testing of wear;

[0017] (3) There are several bumps of different sizes and positions on the side of the roller, which simulates the use environment of the fire hose and can detect the real data of wear;

[0018] (4) The rollers are set between the bottom plate and the top plate, and the fire hose is set between the two groups of rollers. Through the ingenious combination of structures, it is ensured that the fire hose does not bend in the middle and the detection data is accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the present invention.

[0020] Figure 2 It is a top view of the present invention.

[0021] List of reference numerals:

[0022] 1. Detection frame, 2. Track, 3. Pneumatic shaft, 4. Magnetic powder brake, 5. Slide, 6. Base, 7. Bottom plate, 8. Top plate, 9. Roller, 10. Motor, 11. Bearing, 12. Bump, 13. Bolt, 14. Fire hose, 15. Air blow pipe. DETAILED DESCRIPTION

[0023] The present invention is further explained below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the accompanying drawings, and the words "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0024] As shown in the figure, a high-efficiency wear-resistant test device for fire hoses described in the present invention includes a detection frame 1, and two parallel tracks 2 are provided on the plane of the detection frame 1. An air-expanding shaft 3 is provided in the middle of the upper part of the detection frame 1, and the air-expanding shaft 3 is connected to a magnetic powder brake 4. A slide 5 is provided below the air-expanding shaft 3, and the slide 5 includes a base 6, a bottom plate 7, a top plate 8, a roller 9, and a motor 10. The motor 10 drives the base 6 to move on the track 2, the bottom plate 7 is fixed on the base 6, and the top plate 8 is arranged above the bottom plate 7. Symmetrical bearings 11 are provided on the opposite surfaces of the bottom plate 7 and the top plate 8. The roller 9 is divided into two groups and arranged between corresponding upper and lower bearings. The air-expanding shaft is arranged between the two groups of rollers. The roller 9 is a vertical structure, and the side of the roller 9 is a concave arc, and a plurality of protrusions 12 are provided on the side of the roller 9.

[0025] The invention relates to a highly efficient wear-resistant testing device for fire hoses. When working, the inflatable shaft 3 is passed through the interior of the fire hose 14 and expands rapidly after being inflated (the inflatable shaft 3 is selected according to the diameter of the fire hose 14, and the diameter of the inflatable shaft 3 is 5-10 mm smaller than that of the fire hose 14). The inflatable shaft 3 is a tile-type inflatable shaft, which fills a large area of ​​the interior of the fire hose 14 after being inflated, has stable dimensions, and is convenient for wear testing.

[0026] The arc-shaped side surfaces of the two groups of rollers described in the present invention fully wrap around the outer side surface of the fire hose. The outer side surface of the fire hose is rubbed by the rotation of the rollers. The side surfaces of the rollers are provided with a plurality of protrusions of different sizes and positions, which closely simulate the use environment of the fire hose and can quickly and accurately test the wear degree.

[0027] The invention discloses a high-efficiency wear-resistant test device for fire hoses. When working, the bolts 13 are loosened, the top plate 8 is taken out, and the specifications of the inflatable shaft 3 and the roller 9 are selected according to the diameter of the fire hose 14. After the inflatable shaft 3 is selected, it is inserted into the fire hose 14 and inflated. The roller 9 is selected and inserted into a suitable bearing 11 (2-5 bearings are provided on the bottom plate 7 and the top plate 8, and corresponding upper and lower bearings can be selected to press the roller 9). The top plate 8 is covered (the upper bearing and the convex column on the roller are transitionally matched), and the bottom plate 7 and the top plate 8 are connected by bolts 13. After completion, it is necessary to ensure that the fire hose 14 is between the arc-shaped sides of the two groups of rollers (similar to two semicircles wrapping a whole circle). This structure can ensure that the fire hose does not bend in the middle. When working, the motor 10 drives the slide 5 to move forward and backward along the track 2, and the roller is driven to rotate by the friction between the roller and the fire hose. The convex blocks 12 of various shapes on the side of the roller continuously rub against the surface of the fire hose, which is very similar to the fire hose constantly moving forward. The wear test data is relatively accurate.

[0028] A gap is left between the roller 9 and the bottom plate 7 and the top plate 8 in the present invention to prevent the fire hose 14 from hitting the bottom plate 7 or the top plate 8 after deformation, thereby affecting the authenticity of the data.

[0029] The protrusions 12 of the present invention are semicircular, square, trapezoidal or triangular, and are randomly arranged on the arc-shaped side surface of the roller 9, which most realistically simulates the use environment of the fire hose.

[0030] In each group of rollers described in the present invention, 2-4 rollers are arranged in a straight line parallel to the inflation axis, ensuring that the friction force applied by the rollers 9 to the surface of the fire hose 14 is symmetrical, the deformation of the fire hose 14 is small, and the data is true. The distance moved in the same direction by each roller is ≥ roller diameter * π (at least one circle), ensuring that the bump 12 has sufficient friction with the surface of the fire hose 14, and improving the authenticity of the test data.

[0031] Due to the continuous friction between the roller 9 and the surface of the fire hose 14, the surface of the fire hose 14 will heat up. The increase in temperature will affect the authenticity of the data. Because water is continuously sprayed at the fire scene, there is water on the ground. When the fire hose 14 moves and sprays water, there is water inside and outside. Therefore, temperature is not the main factor in detecting the wear of the hose. In order to ensure the authenticity of the detection data, the present invention provides an air pipe 15 between two adjacent rollers 9 to cool the surface of the fire hose 14.

[0032] The technical means disclosed in the scheme of the present invention are not limited to the technical means disclosed in the above-mentioned implementation mode, but also include technical schemes composed of any combination of the above technical features.

Claims

1. A fire hose high-efficiency wear-resistant test device, characterized in that: It includes a detection frame, and two parallel tracks are provided on the plane of the detection frame. A tile-type pneumatic shaft is provided in the middle of the upper part of the detection frame. The pneumatic shaft is connected to a magnetic powder brake, and a slide is provided below the pneumatic shaft. The slide includes a base, a bottom plate, a top plate, rollers, and a motor. The motor drives the base to move on the track, the bottom plate is fixed on the base, and the top plate is arranged above the bottom plate. The bottom plate and the top plate are connected by bolts, and symmetrical bearings are provided on the opposite surfaces of the bottom plate and the top plate. The rollers are divided into two groups and arranged between corresponding upper and lower bearings. A gap is provided between the rollers and the bottom plate and the top plate. The pneumatic shaft is arranged between the two groups of rollers. The rollers are a vertical structure, and the side surfaces of the rollers are concave arcs, and the side surfaces of the rollers are provided with a plurality of protrusions.

2. A fire hose high-efficiency wear-resistant test device according to claim 1, characterized in that: The projection is semicircular, square, trapezoidal or triangular.

3. A fire hose high-efficiency wear-resistant test device according to claim 1, characterized in that: Each set of rollers has 2-4 rollers arranged side by side in a straight line parallel to the inflation axis.

4. A fire hose high-efficiency wear-resistant test device according to claim 1, characterized in that: The distance between two adjacent rollers in each group of rollers is ≥ roller diameter*π.

5. A fire hose high-efficiency wear-resistant test device according to claim 1, characterized in that: The bottom plate and the top plate are provided with 2-5 bearings.

6. A fire hose high-efficiency wear-resistant test device according to claim 1, characterized in that: An air blowing pipe is arranged on the outer side of the roller.

Images