Fire hose wear resistance detection equipment and detection method

Abstract

The application relates to a fire hose wear resistance detection equipment and a detection method in the technical field of fire-fighting equipment detection, which comprises a case, a center frame fixedly installed at the middle of the inner wall of the case, a polishing mechanism rotationally arranged on the inner wall of the center frame, a rotating mechanism arranged on the center frame and used for driving the polishing mechanism to rotate, a first cap and a second cap, a fire hose body passing through the polishing mechanism arranged between the first cap and the second cap, and a fixing piece arranged at one end of the first cap and one end of the second cap and used for sealing the fire hose body. The fourfold guarantee effectively eliminates the gap between the fire hose and the friction component generated by the negative pressure adsorption mode of the prior art, ensures that the wear simulation is highly consistent with the actual fire scene hose dragging wear state, greatly improves the accuracy and reliability of the detection result, and meets the accurate requirement of fire hose quality detection.

Description

Technical Field

[0001] This invention relates to the field of fire equipment testing technology, and in particular to a device and method for testing the abrasion resistance of fire hoses. Background Technology

[0002] Fire hoses are core equipment used in firefighting operations to transport fire-fighting water and extinguishing agents such as foam. Their abrasion resistance directly affects their reliability and safety during use. At a fire scene, fire hoses need to be dragged across rough surfaces (such as cement, gravel, and asphalt). If their abrasion resistance is insufficient, the outer skin can easily break, fibers can be exposed, or even burst, leading to interruption of the extinguishing agent delivery, delaying firefighting efforts, and causing safety accidents. Therefore, accurate and comprehensive abrasion resistance testing of fire hoses is a crucial step in ensuring the quality of firefighting equipment.

[0003] A search revealed a fire hose abrasion resistance testing device and method, authorized by publication number CN117030522B. The device includes a straight rod, radially extendable support bodies, a sector-shaped plate, a drive motor, and a vacuum pump. At least two support bodies are axially mounted on the straight rod. The sector-shaped plate is circumferentially mounted on the outside of the straight rod and axially fixed to the support bodies. The fire hose to be tested is sleeved on the sector-shaped plate. A friction tube for testing is sleeved on the outside of the fire hose. Drive motors for rotating the straight rod are located at both ends of the straight rod. The vacuum pump is located on one side of the straight rod and is airtightly connected to the fire hose. By installing a straight rod inside the fire hose and mounting several support bodies on it, the extension rods of the support bodies rise, causing the sector-shaped plate to lift, thus firmly supporting the fire hose. A vacuum pump is installed at the fire hose port, creating a sealed space inside the fire hose. The internal air is then evacuated, and the extracted air is simultaneously circulated into the support bodies to support the hose.

[0004] Based on the aforementioned patents, the existing technology has the following shortcomings: poor bonding reliability. The existing technology uses negative pressure adsorption to make the water hose tightly adhere to the fan-shaped plate. This operation easily leads to gaps between the fire hose and the external friction tube, making it impossible to achieve a tight fit between the two. This directly causes the wear simulation to be unrealistic, resulting in insufficient accuracy and reliability of the test results, and failing to meet the precise requirements of fire hose quality testing. Therefore, a fire hose abrasion resistance testing device and testing method are proposed to improve the above problems. Summary of the Invention

[0005] The technical problem that this invention aims to solve in view of the above-mentioned prior art is that it is impossible to achieve a tight fit between the fire hose and the external friction tube, which easily leads to inaccurate test results.

[0006] To address the above problems, this invention provides a device and method for testing the abrasion resistance of fire hoses, comprising:

[0007] A chassis, wherein a central frame is fixedly installed in the middle of the inner wall of the chassis;

[0008] A grinding mechanism is rotatably mounted on the inner wall of a central frame, and a rotating mechanism for driving the grinding mechanism to rotate is provided on the central frame.

[0009] A first cap and a second cap are provided, and a fire hose body passing through the grinding mechanism is provided between the first cap and the second cap. A fixing member is provided at one end of the first cap and one end of the second cap to seal the fire hose body. An installation plate is fixedly installed at the bottom of the second cap to the inner wall of the casing.

[0010] The first electric push rod is fixedly installed on the inner wall of one end of the chassis and is used to pull the first cap and tighten the fire hose body.

[0011] One end of the second cap is fixed with a water inlet pipe, and a water pressure sensor is fixedly installed at the bottom of the water inlet pipe. A water injection assembly is provided at one end of the water inlet pipe.

[0012] A fixing tube is fixed in the middle of the inner wall of the second cap, and a connecting tube is fixed at one end of the fixing tube. A connecting tube is fixed at one end of the connecting tube, and the inner diameter of the connecting tube is larger than the inner diameter of the fixing tube and the connecting tube. A central support is provided at one end of the connecting tube, and the central support is located at the center of the grinding mechanism.

[0013] Airbag supports are provided at both ends of the central support;

[0014] The first cap is provided with a compression assembly for driving the central support and the airbag support to unfold.

[0015] The invention is further configured such that the grinding mechanism includes a rotating cylinder rotatably mounted on the inner wall of the central frame via a bearing, and a second electric push rod is fixedly installed at both ends of the outer wall of the rotating cylinder. Two grinding hoops are fixedly installed at the piston end of the second electric push rod. The two grinding hoops are closed into a whole by adjusting the second electric push rod, and the middle area of ​​the fire hose body is compressed. The inner wall of each grinding hoop is provided with equally spaced water leakage grooves, and the inner walls of the water leakage grooves and the inner walls of the grinding hoop are both rounded at both ends.

[0016] The invention is further configured such that the rotating mechanism includes toothed grooves equally spaced at the middle of the outer wall of the rotating cylinder, and a drive gear meshing with the toothed grooves is rotatably provided on the inner wall of the central frame. A rotary motor for driving the drive gear to rotate is fixedly installed on the outer wall of the central frame, and the rotary motor is offset from the second electric push rod.

[0017] The invention is further configured such that the central support includes a central cylinder fixed to one end of the connecting pipe, and movable frames slidably arranged at equal intervals on the inner wall of the central cylinder. Support plates are inserted into the inner walls of the movable frames. First springs are fixedly installed at equal intervals on the bottom of the support plates and the inner walls of the movable frames. Movable openings are opened at equal intervals on the outer wall of the central cylinder for the support plates to pass through. Sealing grooves are opened on the outer walls of the support plates around the perimeter. Sealing rings that seal against the inner walls of the movable openings are fixedly installed on the inner walls of the sealing grooves. Second through holes are opened at one end of the central cylinder and one end of the connecting pipe. Movable rods are inserted into the inner walls of the second through holes. Insertion holes are opened at one end of the movable rods. Fixed rods inserted into the insertion holes are fixed on the inner walls of the other end of the central cylinder. Second springs are fixedly installed at one end of the fixed rods and one end of the insertion holes. Extrusion seats are fixedly arranged at equal intervals on one end of the outer wall of the movable rods. Lifting seats are fixedly installed at the bottom center of the movable frames. The bottom of the lifting seats and the top of the extrusion seats are designed to be inclined surfaces that fit together.

[0018] The invention is further configured such that a traction groove is provided on the inclined surface of the lifting seat, and a traction block is fixedly provided on the inclined surface of the compression seat and slidably disposed in the traction groove. The cross-sections of the traction block and the traction groove are both designed to be T-shaped. Guide grooves are provided on the inner walls of both ends of the central cylinder in an annular arrangement at equal intervals, and guide blocks are fixedly provided on both ends of the movable frame and slidably disposed in the guide groove.

[0019] The invention is further configured such that the airbag support includes airbag rings fixedly installed on the outer walls of both ends of the central cylinder, and multiple air guide tubes passing through the central cylinder are fixed between the two airbag rings. The positions of the air guide tubes are offset from the positions of the movable frame. Multiple air inlet tubes are fixed between one end of the connecting cylinder and one of the airbag rings, and a piston disc is movably fitted to the inner wall of the connecting cylinder. A sealing sleeve is fixedly installed on one end of the inner wall of the connecting tube.

[0020] The present invention is further configured such that the extrusion assembly includes a U-shaped connecting rod fixedly installed on the top of the first cap, and a first through hole is provided at the other end of the fixing tube and the middle of the second cap. An extrusion rod passing through the first through hole, the fixing tube and the connecting cylinder is fixed at one end of the U-shaped connecting rod. One end of the extrusion rod is in contact with the other end of the movable rod. The outer wall of the extrusion rod is fully fitted with the inner wall of the sealing sleeve, and the piston disc is fixedly installed on the outer wall of the extrusion rod.

[0021] The present invention is further configured such that the water injection assembly includes a water tank fixedly installed inside the chassis, and a water pump is fixedly installed on the inner wall of the chassis. A water pump inlet end is fixedly installed with a water suction pipe inserted into the water tank, and a water guide pipe is fixedly installed on the water pump outlet end. A valve is fixedly installed at one end of the water guide pipe and one end of the water inlet pipe.

[0022] The present invention is further configured such that a controller is fixedly installed on the inner wall of the chassis, and a timer is provided on the controller. The controller is electrically connected to the timer, the first electric push rod, the second electric push rod, the valve, the water pump, the water pressure sensor, and the rotary motor.

[0023] A method for testing the abrasion resistance of fire hoses, applied to a fire hose abrasion resistance testing device, includes the following steps:

[0024] Step 1: Secure and seal both ends of the fire hose body to the first cap and the second cap respectively using fasteners, so that the fire hose body passes through the grinding mechanism on the inner wall of the central frame;

[0025] Step 2: Start the first electric push rod through the controller. The first electric push rod pulls the first cap to move, which tightens the fire hose body. At the same time, the first cap moves the compression rod along the first through hole and the fixed pipe into the connecting cylinder through the U-shaped connecting rod. One end of the compression rod squeezes the movable rod to move along the second through hole. The compression seat on the movable rod pushes the lifting seat at the bottom of the movable frame to rise through the inclined surface. The movable frame slides along the guide groove on the inner wall of the central cylinder, which drives the support plate to extend along the movable opening. It works with the sealing ring to achieve sealing support. At the same time, the piston disc on the compression rod moves in the connecting cylinder, which pushes the gas in the connecting cylinder into the airbag ring through the air inlet pipe. The gas then expands synchronously through the air guide pipe.

[0026] Step 3: Start the water pump through the controller. The water pump draws water from the water tank through the water pipe. The water flows through the water pipe, valve and inlet pipe and into the fire hose body. The water pressure sensor monitors the water pressure data in real time and feeds it back to the controller. When the water pressure reaches the set threshold, the controller controls the valve and water pump to close.

[0027] Step 4: The controller controls the second electric push rod to adjust the two grinding hoops to close, compressing the middle area of ​​the fire hose body so that the grinding hoops fit fully against the fire hose body;

[0028] Step 5: The controller starts the rotary motor, which drives the drive gear to rotate. The drive gear meshes with the tooth groove on the outer wall of the rotating drum, causing the drum to rotate. The rotating drum drives the grinding hoop to rub against the fire hose body to simulate wear. At the same time, the timer starts timing. The water stains generated during the friction process are discharged through the drain trough.

[0029] Step Six: When the fire hose body leaks, the water pressure sensor detects the sudden change in water pressure and sends it back to the controller. The controller records the timer data at this time and simultaneously controls the rotary motor and related electric push rods to stop working, thus completing the detection.

[0030] Step 7: After the test is completed, open the valve to drain the water from the fire hose body, control the first electric push rod to reset, loosen the fastener, take out the fire hose body, and export the test data through the controller.

[0031] In summary, by adopting the above structure, the present invention has the following advantages compared with the prior art:

[0032] 1. This invention employs a dual-support structure of "central support and airbag support," combined with the internal water pressure of the fire hose. Simultaneously, a second electric push rod drives two grinding hoops to close and compress the fire hose, creating a concave area. This achieves a tight fit between the fire hose and the grinding mechanism. Specifically, when the fire hose is tightened by the first electric push rod, the support plate of the central support is simultaneously driven to extend radially through the compression assembly, providing uniform support from the central area inside the hose. Simultaneously, the compression assembly drives the piston disc to compress gas, causing the airbag ring to expand and providing auxiliary support from both ends of the hose. Combined with the internal water pressure after water injection, and the external compression effect of the grinding hoops driven by the second electric push rod, this quadruple protection effectively eliminates the gaps between the hose and friction components that are easily generated by the negative pressure adsorption method in existing technologies. This ensures that the wear simulation is highly consistent with the actual wear state of the hose during fire scenes, significantly improving the accuracy and reliability of the test results and meeting the precise requirements for fire hose quality testing.

[0033] 2. In this invention, the grinding mechanism is rotated as a whole by the rotating mechanism, so that the grinding hoop and the fire hose form a uniform circumferential friction. At the same time, the grinding hoop can adjust the degree of closure by the second electric push rod to achieve precise compression of the middle area of ​​the fire hose, simulating the shape of the hose under water pressure in actual use. In addition, the water groove opened on the inner wall of the grinding hoop can drain the water stains generated during the friction process in time, further restoring the real wear environment.

[0034] 3. In this invention, the first electric push rod realizes the linkage control of fire hose tensioning, central support deployment, and airbag support expansion, without the need for additional multiple drive components, thus simplifying the operation process; at the same time, the controller coordinates the operation of components such as rotary motor, water pump, electric push rod, timer, and water pressure sensor, and can automatically complete the entire process of "fitting, water injection, polishing, timing, and monitoring" without frequent manual intervention. Attached Figure Description

[0035] Figure 1 This is a three-dimensional structural diagram of a fire hose abrasion resistance testing device according to the present invention;

[0036] Figure 2 This is a schematic diagram of the central frame and water injection component structure of a fire hose abrasion resistance testing device according to the present invention;

[0037] Figure 3 for Figure 2 3D sectional view;

[0038] Figure 4 for Figure 2 Front sectional view;

[0039] Figure 5 This is a schematic diagram of the rotating mechanism structure of a fire hose abrasion resistance testing device according to the present invention;

[0040] Figure 6 This is a schematic diagram of the grinding hoop and water leakage groove structure of a fire hose abrasion resistance testing device according to the present invention;

[0041] Figure 7 This is a schematic diagram of the central cylinder and connecting cylinder structure of a fire hose abrasion resistance testing device according to the present invention;

[0042] Figure 8 for Figure 7 3D sectional view;

[0043] Figure 9 This is a schematic diagram of the first and second through holes of a fire hose abrasion resistance testing device according to the present invention;

[0044] Figure 10 This is a schematic diagram of the extrusion seat and lifting seat structure of a fire hose abrasion resistance testing device according to the present invention;

[0045] Figure 11 This is a schematic diagram of the traction groove structure of a fire hose abrasion resistance testing device according to the present invention;

[0046] Figure 12 This is a schematic diagram of the airbag support structure of a fire hose abrasion resistance testing device according to the present invention.

[0047] Explanation of the labels in the diagram:

[0048] 1. Chassis; 2. Center frame; 3. Controller; 4. First cap; 5. First electric push rod; 6. Fixing component; 7. Fire hose body; 8. Grinding mechanism; 81. Rotary drum; 82. Grinding hoop; 83. Second electric push rod; 84. Leakage groove; 9. Second cap; 10. Extrusion assembly; 101. U-shaped connecting rod; 102. Extrusion rod; 103. First through hole; 11. Water injection assembly; 111. Water tank; 112. Valve; 113. Water guide pipe; 114. Water pump; 12. Mounting plate; 13. Water pressure sensor; 14. Inlet pipe; 15. Center support component; 151. Center cylinder; 152. Support plate; 153. First 154. Spring; 155. Movable frame; 156. Fixed rod; 157. Second spring; 158. Insertion hole; 159. Movable rod; 150. Second through hole; 1510. Guide groove; 1511. Movable opening; 1512. Sealing ring; 1513. Compression seat; 1514. Lifting seat; 1515. Sealing groove; 1516. Traction groove; 16. Airbag support; 161. Airbag ring; 162. Air inlet pipe; 163. Air guide pipe; 164. Sealing sleeve; 165. Piston disc; 17. Connecting cylinder; 18. Fixed pipe; 19. Rotating mechanism; 191. Rotary motor; 192. Drive gear; 193. Gear groove; 20. Connecting pipe. Detailed Implementation

[0049] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0050] In the description of this invention, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0051] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection or setting, a detachable connection or setting, or an integral connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0052] Please see Figures 1-12This invention provides a device for testing the abrasion resistance of fire hoses, comprising:

[0053] Chassis 1, with a central frame 2 fixedly installed in the middle of the inner wall of chassis 1;

[0054] A grinding mechanism 8 is rotatably mounted on the inner wall of the central frame 2, and a rotating mechanism 19 is provided on the central frame 2 to drive the grinding mechanism 8 to rotate. The grinding mechanism 8 includes a rotating cylinder 81 rotatably mounted on the inner wall of the central frame 2 via bearings, and two second electric push rods 83 are fixedly installed at both ends of the outer wall of the rotating cylinder 81. Two grinding hoops 82 are fixedly installed at the piston end of the second electric push rods 83. The two grinding hoops 82 are closed into a whole by adjusting the second electric push rods 83, thus closing the middle area of ​​the fire hose body 7. The inner wall of the grinding hoop 82 is provided with equally spaced drainage grooves 84, and the inner walls of the drainage grooves 84 and the inner walls of the grinding hoop 82 are rounded at both ends. The rotating mechanism 19 includes toothed grooves 193 equally spaced in the middle of the outer wall of the rotating cylinder 81, and the inner wall of the center frame 2 is rotatably provided with a drive gear 192 that meshes with the toothed grooves 193. The outer wall of the center frame 2 is fixedly installed with a rotary motor 191 for driving the drive gear 192 to rotate. The rotary motor 191 is offset from the second electric push rod 83.

[0055] A first cap 4 and a second cap 9 are provided between the first cap 4 and the second cap 9, through which a fire hose body 7 passes. A fixing member 6 is provided at one end of the first cap 4 and one end of the second cap 9 to seal the fire hose body 7. An installation plate 12 is fixedly installed at the bottom of the second cap 9 and the inner wall of the casing 1.

[0056] The first electric push rod 5 is fixedly installed on the inner wall of one end of the housing 1, and is used to pull the first cap 4 to move and drive the fire hose body 7 to tighten.

[0057] The second cap 9 has a water inlet pipe 14 fixed at one end, and a water pressure sensor 13 is fixedly installed at the bottom of the water inlet pipe 14. A water injection assembly 11 is provided at one end of the water inlet pipe 14.

[0058] A fixing tube 18 is fixed in the middle of the inner wall of the second cap 9, and a connecting tube 17 is fixed to one end of the fixing tube 18. A connecting tube 20 is fixed to one end of the connecting tube 17, and the inner diameter of the connecting tube 17 is larger than the inner diameters of the fixing tube 18 and the connecting tube 20. A central support 15 is provided at one end of the connecting tube 20. The central support 15 is located at the center of the grinding mechanism 8. The central support 15 includes a central tube 151 fixed to one end of the connecting tube 20, and movable frames 154 are slidably arranged at equal intervals on the inner wall of the central tube 151. Support plates 152 are inserted into the inner wall of the movable frame 154. First springs 153, evenly distributed, are fixedly installed at the bottom of the support plates 152 and the inner wall of the movable frame 154. Movable openings 1511, evenly spaced, are provided on the outer wall of the central cylinder 151 for the support plates 152 to pass through. Sealing grooves 1515 are provided on the outer walls of the support plates 152. Sealing rings 1512, which seal tightly against the inner wall of the movable openings 1511, are fixedly installed on the inner wall of the sealing grooves 1515. One end of the central cylinder 151 and one end of the connecting pipe 20 are connected. Each of the central cylinder 151 has a second through hole 159, and a movable rod 158 is inserted into the inner wall of the second through hole 159. One end of the movable rod 158 has an insertion hole 157. The inner wall of the other end of the central cylinder 151 is fixed with a fixed rod 155 that is inserted into the insertion hole 157. One end of the fixed rod 155 and one end of the insertion hole 157 are fixedly installed with a second spring 156. One end of the outer wall of the movable rod 158 is fixed with equally spaced compression seats 1513. A lifting seat 1514 is fixedly installed at the bottom center of each movable frame 154. The bottom of 1514 and the top of the extrusion seat 1513 are both designed to fit together in a sloping shape. The sloping surface of the lifting seat 1514 is provided with a traction groove 1516, and the sloping surface of the extrusion seat 1513 is fixed with a traction block that is slidably disposed in the traction groove 1516. The cross-section of the traction block and the traction groove 1516 are both designed to be T-shaped. The inner walls of both ends of the central cylinder 151 are provided with guide grooves 1510 that are evenly spaced and distributed in a ring. The two ends of the movable frame 154 are fixed with guide blocks that are slidably disposed in the guide grooves 1510.

[0059] The central support 15 is provided with airbag support 16 at both ends. The airbag support 16 includes airbag rings 161 fixedly installed on the outer walls of both ends of the central cylinder 151. Multiple air guide tubes 163 passing through the central cylinder 151 are fixed between the two airbag rings 161. The position of the air guide tubes 163 is offset from the position of the movable frame 154. Multiple air inlet tubes 162 are fixed between one end of the connecting cylinder 17 and one of the airbag rings 161. The inner wall of the connecting cylinder 17 is movably fitted with a piston disc 165. A sealing sleeve 164 is fixedly installed on one end of the inner wall of the connecting tube 20.

[0060] The first cap 4 is provided with a compression assembly 10 for driving the central support 15 and the airbag support 16 to unfold. The compression assembly 10 includes a U-shaped connecting rod 101 fixedly installed on the top of the first cap 4, and a first through hole 103 is opened at the other end of the fixing tube 18 and the middle of the second cap 9. One end of the U-shaped connecting rod 101 is fixed with a compression rod 102 that passes through the first through hole 103, the fixing tube 18 and the connecting cylinder 17. One end of the compression rod 102 is in contact with the other end of the movable rod 158. The outer wall of the compression rod 102 is fully fitted with the inner wall of the sealing sleeve 164, and the piston disc 165 is fixedly installed on the outer wall of the compression rod 102.

[0061] In this invention, the water injection assembly 11 includes a water tank 111 fixedly installed inside the housing 1, and a water pump 114 fixedly installed on the inner wall of the housing 1. A water inlet pipe inserted into the water tank 111 is fixedly installed at the water inlet end of the water pump 114, and a water guide pipe 113 is fixedly installed at the water outlet end of the water pump 114. A valve 112 is fixedly installed at one end of the water guide pipe 113 and one end of the water inlet pipe 14.

[0062] In this invention, a controller 3 is also fixedly installed on the inner wall of the casing 1, and a timer is provided on the controller 3. The controller 3 is electrically connected to the timer, the first electric push rod 5, the second electric push rod 83, the valve 112, the water pump 114, the water pressure sensor 13, and the rotary motor 191.

[0063] A method for testing the abrasion resistance of fire hoses, applied to a fire hose abrasion resistance testing device, includes the following steps:

[0064] Step 1: Fix and seal both ends of the fire hose body 7 to the first cap 4 and the second cap 9 respectively through the fastener 6, so that the fire hose body 7 passes through the grinding mechanism 8 on the inner wall of the central frame 2;

[0065] Step 2: The first electric push rod 5 is activated by the controller 3. The first electric push rod 5 pulls the first cap 4 to move, which in turn tightens the fire hose body 7. At the same time, the first cap 4 drives the extrusion rod 102 to move along the first through hole 103 and the fixed pipe 18 into the connecting cylinder 17 through the U-shaped connecting rod 101. One end of the extrusion rod 102 extrudes the movable rod 158 along the second through hole 159. The extrusion seat 1513 on the movable rod 158 pushes the lifting seat 1514 at the bottom of the movable frame 154 to rise through the inclined surface. The movable frame 154 slides along the guide groove 1510 on the inner wall of the central cylinder 151, which drives the support plate 152 to extend along the movable opening 1511 and cooperates with the sealing ring 1512 to achieve sealing support. At the same time, the piston disc 165 on the extrusion rod 102 moves in the connecting cylinder 17, which pushes the gas in the connecting cylinder 17 into the airbag ring 161 through the air inlet pipe 162. The gas then expands synchronously through the air guide pipe 163.

[0066] Step 3: Start the water pump 114 through the controller 3. The water pump 114 draws water from the water tank 111 through the water pipe. The water flows through the water pipe 113, valve 112 and inlet pipe 14 in sequence into the fire hose body 7. The water pressure sensor 13 monitors the water pressure data in real time and feeds it back to the controller 3. When the water pressure reaches the set threshold, the controller 3 controls the valve 112 and the water pump 114 to close.

[0067] Step 4: Controller 3 controls the second electric push rod 83 to move, adjust the two grinding hoops 82 to close, compress the middle area of ​​the fire hose body 7, and make the grinding hoops 82 fully fit with the fire hose body 7;

[0068] Step 5: Controller 3 starts the rotary motor 191, which drives the drive gear 192 to rotate. The drive gear 192 drives the rotary drum 81 to rotate by meshing with the tooth groove 193 on the outer wall of the rotary drum 81. The rotary drum 81 drives the grinding hoop 82 to rub against the fire hose body 7 to simulate wear. At the same time, the timer starts timing. The water stains generated during the friction process are discharged through the water leakage groove 84.

[0069] Step 6: When the fire hose body 7 leaks, the water pressure sensor 13 detects the sudden change in water pressure and feeds it back to the controller 3. The controller 3 records the time data of the timer at this time, and at the same time controls the rotary motor 191 and related electric push rods to stop working, thus completing the detection.

[0070] Step 7: After the test is completed, open valve 112 to drain the water in the fire hose body 7, control the first electric push rod 5 to reset, loosen the fixing part 6, take out the fire hose body 7, and export the test data through the controller 3.

[0071] In summary, the working principle of the present invention is as follows: during testing, the two ends of the fire hose body 7 are first fixed and sealed to the first cap 4 and the second cap 9 respectively by the fixing parts 6, so that the fire hose body 7 passes through the grinding mechanism 8 on the inner wall of the central frame 2;

[0072] Subsequently, the first electric push rod 5 is activated to pull the first cap 4, causing the fire hose body 7 to tighten. At the same time, the first cap 4, through the U-shaped connecting rod 101, drives the pressing rod 102 to move along the first through hole 103 and the fixed pipe 18 into the connecting cylinder 17. One end of the pressing rod 102 presses the movable rod 158 to move along the second through hole 159. The pressing seat 1513 on the movable rod 158 pushes the lifting seat 1514 at the bottom of the movable frame 154 to rise through the inclined surface cooperation. The movable frame 154 moves along the middle The guide groove 1510 on the inner wall of the core cylinder 151 slides, causing the support plate 152 to extend along the movable opening 1511, and cooperates with the sealing ring 1512 to achieve sealing support. At the same time, the piston disc 165 on the extrusion rod 102 moves in the connecting cylinder 17, and presses the gas in the connecting cylinder 17 into the airbag ring 161 through the air inlet pipe 162. The gas then passes through the air guide pipe 163 to achieve synchronous expansion of the two airbag rings 161, together ensuring that the fire hose body 7 and the grinding hoop 82 of the grinding mechanism 8 fit tightly together.

[0073] Then, the water pump 114 is started by the controller 3, and water is injected into the fire hose body 7 through the water pumping pipe, water guide pipe 113, and water inlet pipe 14. The water pressure sensor 13 monitors the water pressure in real time, and closes the valve 112 after the set value is reached.

[0074] Finally, the second electric push rod 83 adjusts the two grinding hoops 82 to close, compressing the middle area of ​​the fire hose body 7. Combined with the previous center support 15, airbag support 16 and water pressure, the grinding hoops 82 are fully fitted with the fire hose body 7. Then, the rotary motor 191 is started to drive the drive gear 192 to rotate. Through the meshing with the toothed groove 193 on the outer wall of the rotating drum 81, the rotating drum 81 is driven to rotate. The rotation of the rotating drum 81 causes the grinding hoops 82 to rub against the fire hose body 7 to simulate wear. The water leakage groove 84 can drain the water stains generated by the friction. The timer records the time from grinding to leakage. The controller 3 coordinates the operation of each component to complete the wear resistance test.

[0075] In light of current practical needs, the above-described embodiments of this invention are not limited to these specific implementations. Any changes made within the scope of knowledge possessed by those skilled in the art, without departing from the concept of this invention, still fall within the protection scope of this invention.

Claims

1. A device for testing the abrasion resistance of fire hoses, characterized in that, include: A chassis (1) is provided with a central frame (2) fixedly installed in the middle of the inner wall of the chassis (1). A polishing mechanism (8) is rotatably disposed on the inner wall of the central frame (2), and a rotating mechanism (19) for driving the polishing mechanism (8) to rotate is provided on the central frame (2). A first cap (4) and a second cap (9) are provided between the first cap (4) and the second cap (9), through which a fire hose body (7) passes (8), and a fastener (6) is provided at one end of the first cap (4) and one end of the second cap (9) to seal the fire hose body (7). The first electric push rod (5) is fixedly installed on the inner wall of one end of the housing (1) and is used to pull the first cap (4) to move and drive the fire hose body (7) to tighten. The second cap (9) is fixed with a water inlet pipe (14) at one end, and a water pressure sensor (13) is fixedly installed at the bottom of the water inlet pipe (14). A water injection assembly (11) is provided at one end of the water inlet pipe (14). A fixing tube (18) is fixed in the middle of the inner wall of the second cap (9), and a connecting tube (17) is fixed at one end of the fixing tube (18). A connecting tube (20) is fixed at one end of the connecting tube (17), and the inner diameter of the connecting tube (17) is larger than the inner diameter of the fixing tube (18) and the connecting tube (20). A central support (15) is provided at one end of the connecting tube (20), and the central support (15) is located at the center of the grinding mechanism (8). The central support (15) is provided with airbag support (16) at both ends. The central support (15) includes a central cylinder (151) fixed to one end of the connecting pipe (20), and movable frames (154) are slidably distributed on the inner wall of the central cylinder (151). The airbag support (16) includes airbag rings (161) fixedly installed on the outer walls of both ends of the central cylinder (151), and multiple air guide pipes (163) passing through the central cylinder (151) are fixed between the two airbag rings (161). The position of the air guide pipes (163) is offset from the position of the movable frames (154). Multiple air inlet pipes (162) are fixed between one end of the connecting cylinder (17) and one of the airbag rings (161), and a piston disc (165) is movably attached to the inner wall of the connecting cylinder (17). A sealing sleeve (164) is fixedly installed on one end of the inner wall of the connecting pipe (20). The first cap (4) is provided with a compression assembly (10) for driving the central support (15) and the airbag support (16) to unfold.

2. The fire hose abrasion resistance testing equipment according to claim 1, characterized in that, The grinding mechanism (8) includes a rotating cylinder (81) that is rotatably mounted on the inner wall of the central frame (2) via a bearing. Both ends of the outer wall of the rotating cylinder (81) are fixedly mounted with a second electric push rod (83). The piston end of the second electric push rod (83) is fixedly mounted with two grinding hoops (82). The two grinding hoops (82) are closed into a whole by adjusting the second electric push rod (83), and the middle area of ​​the fire hose body (7) is compressed. The inner wall of the grinding hoop (82) is provided with equally spaced water leakage grooves (84), and both ends of the inner wall of the water leakage groove (84) and the inner wall of the grinding hoop (82) are rounded.

3. The fire hose abrasion resistance testing equipment according to claim 2, characterized in that, The rotating mechanism (19) includes toothed grooves (193) that are equally spaced in the middle of the outer wall of the rotating cylinder (81), and the inner wall of the center frame (2) is rotatably provided with a drive gear (192) that meshes with the toothed grooves (193). The outer wall of the center frame (2) is fixedly installed with a rotary motor (191) for driving the drive gear (192) to rotate. The rotary motor (191) is offset from the second electric push rod (83).

4. The fire hose abrasion resistance testing equipment according to claim 3, characterized in that, The inner wall of the movable frame (154) is fitted with a support plate (152), and the bottom of the support plate (152) and the inner wall of the movable frame (154) are fixedly installed with first springs (153) distributed at equal intervals. The outer wall of the central cylinder (151) is provided with movable openings (1511) at equal intervals for the support plate (152) to pass through. The outer walls of the support plate (152) are provided with sealing grooves (1515). The inner wall of the sealing groove (1515) is fixedly installed with a sealing ring (1512) that seals against the inner wall of the movable opening (1511). A second through hole (159) is provided at one end of the central cylinder (151) and at one end of the connecting pipe (20). A movable rod (158) is inserted into the inner wall of the second through hole (159). One end of the movable rod (158) has an insertion hole (157). The inner wall of the other end of the central cylinder (151) is fixed with a fixed rod (155) inserted into the insertion hole (157). One end of the fixed rod (155) and one end of the insertion hole (157) are fixedly installed with a second spring (156). One end of the outer wall of the movable rod (158) is fixed with equally spaced extrusion seats (1513). A lifting seat (1514) is fixedly installed at the bottom center of the movable frame (154). The bottom of the lifting seat (1514) and the top of the extrusion seat (1513) are both designed to fit together in a sloping shape.

5. The fire hose abrasion resistance testing equipment according to claim 4, characterized in that, The inclined surface of the lifting seat (1514) is provided with a traction groove (1516), and the inclined surface of the pressing seat (1513) is fixed with a traction block that is slidably disposed in the traction groove (1516). The cross-section of the traction block and the traction groove (1516) are both designed to be T-shaped. The inner walls of both ends of the central cylinder (151) are provided with guide grooves (1510) that are evenly distributed in a ring, and both ends of the movable frame (154) are fixed with guide blocks that are slidably disposed in the guide grooves (1510).

6. The fire hose abrasion resistance testing equipment according to claim 5, characterized in that, The extrusion assembly (10) includes a U-shaped connecting rod (101) fixedly installed on the top of the first cap (4), and a first through hole (103) is provided at the other end of the fixing tube (18) and the middle of the second cap (9). One end of the U-shaped connecting rod (101) is fixed with an extrusion rod (102) that passes through the first through hole (103), the fixing tube (18) and the connecting cylinder (17). One end of the extrusion rod (102) is in contact with the other end of the movable rod (158). The outer wall of the extrusion rod (102) is fully fitted with the inner wall of the sealing sleeve (164), and the piston disc (165) is fixedly installed on the outer wall of the extrusion rod (102).

7. The fire hose abrasion resistance testing equipment according to claim 6, characterized in that, The water injection assembly (11) includes a water tank (111) fixedly installed inside the casing (1), and a water pump (114) is fixedly installed on the inner wall of the casing (1). A water pump (114) is fixedly installed at the water inlet end of the water pump (114) and inserted into the water tank (111). A water guide pipe (113) is fixedly installed at the water outlet end of the water pump (114), and a valve (112) is fixedly installed at one end of the water guide pipe (113) and one end of the water inlet pipe (14).

8. The fire hose abrasion resistance testing equipment according to claim 7, characterized in that, The inner wall of the chassis (1) is also fixedly installed with a controller (3), and a timer is provided on the controller (3). The controller (3) is electrically connected to the timer, the first electric push rod (5), the second electric push rod (83), the valve (112), the water pump (114), the water pressure sensor (13), and the rotary motor (191).

9. A method for testing the abrasion resistance of fire hoses, applied to the fire hose abrasion resistance testing equipment as described in any one of claims 1-8, characterized in that, Includes the following steps: Step 1: Fix and seal both ends of the fire hose body (7) to the first cap (4) and the second cap (9) respectively through the fastener (6), so that the fire hose body (7) passes through the grinding mechanism (8) on the inner wall of the center frame (2); Step 2: Start the first electric push rod (5) through the controller (3). The first electric push rod (5) pulls the first cap (4) to move, which drives the fire hose body (7) to tighten. At the same time, the first cap (4) drives the squeezing rod (102) to move along the first through hole (103) and the fixed pipe (18) into the connecting cylinder (17) through the U-shaped connecting rod (101). One end of the squeezing rod (102) squeezes the movable rod (158) to move along the second through hole (159). The squeezing seat (1513) on the movable rod (158) pushes the movable frame (159) through the inclined surface. 54) The bottom lifting seat (1514) rises, the movable frame (154) slides along the guide groove (1510) on the inner wall of the central cylinder (151), and drives the support plate (152) to extend along the movable opening (1511), and cooperates with the sealing ring (1512) to achieve sealing support. At the same time, the piston disc (165) on the extrusion rod (102) moves in the connecting cylinder (17), and presses the gas in the connecting cylinder (17) into the airbag ring (161) through the air inlet pipe (162). The gas then passes through the air guide pipe (163) to achieve synchronous expansion of the two airbag rings (161). Step 3: Start the water pump (114) through the controller (3). The water pump (114) draws water from the water tank (111) through the water pipe. The water flows through the water pipe (113), valve (112), and inlet pipe (14) in sequence into the fire hose body (7). The water pressure sensor (13) monitors the water pressure data in real time and feeds it back to the controller (3). When the water pressure reaches the set threshold, the controller (3) controls the valve (112) and the water pump (114) to close. Step 4: The controller (3) controls the second electric push rod (83) to close the two grinding hoops (82) and compress the middle area of ​​the fire hose body (7) so that the grinding hoops (82) and the fire hose body (7) fit together fully; Step 5: The controller (3) starts the rotary motor (191), the rotary motor (191) drives the drive gear (192) to rotate, the drive gear (192) drives the rotary drum (81) to rotate by meshing with the tooth groove (193) on the outer wall of the rotary drum (81), the rotary drum (81) drives the grinding hoop (82) to rub against the fire hose body (7) to simulate wear, and at the same time the timer starts timing, the water stains generated during the friction process are discharged through the drain trough (84); Step 6: When the fire hose body (7) leaks, the water pressure sensor (13) detects the sudden change in water pressure and feeds it back to the controller (3). The controller (3) records the time data of the timer at this time, and at the same time controls the rotary motor (191), the first electric push rod (5) and the second electric push rod (83) to stop working, thus completing the detection. Step 7: After the test is completed, open the valve (112) to drain the water in the fire hose body (7), control the first electric push rod (5) to reset, loosen the fixing part (6), take out the fire hose body (7), and export the test data through the controller (3).

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