Abrasion test device for fire hose
By employing a rotating water supply mechanism and a friction mechanism in the fire hose abrasion resistance testing device, the fire hose is kept in a straight state, which solves the problems of unstable hose condition, poor sealing and elongation, and achieves the accuracy and reliability of the test results.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-19
- Publication Date
- 2026-05-15
AI Technical Summary
Existing fire hose abrasion resistance testing devices suffer from problems such as unstable fire hose condition, friction belt displacement, poor sealing, and inability to effectively address hose extension, which affect the accuracy and reliability of test results.
The system employs a rotating water supply mechanism and a friction mechanism. The first and second rotating water supply components are fixedly engaged with the ends of the fire hose to keep the fire hose straight. A sealing method using rubber sleeves and clamps ensures airtightness. The second rotating water supply component provides a range of motion to accommodate hose extension. The tensioning component and reciprocating motion component ensure stable contact between the friction belt and the fire hose.
This improved the accuracy and reliability of the test results, avoided problems such as water hose twisting and leakage, and ensured the stability and ease of operation of the friction test.
Smart Images
Figure CN224247518U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of fire equipment testing technology, specifically to a fire hose abrasion resistance testing device. Background Technology
[0002] Fire hoses play a crucial role in firefighting operations, and their abrasion resistance directly affects their reliability and service life in actual use. Currently, existing fire hose abrasion resistance testing devices have several shortcomings. For example, during testing, it is difficult to maintain a stable, straight state for the fire hose, which affects the accuracy of the test results; the friction belt is prone to displacement during use, leading to test results that do not accurately reflect the abrasion resistance performance of the fire hose; furthermore, under high-pressure environments, traditional sealing methods cannot guarantee a good seal between the fire hose and the water supply components, easily resulting in leakage and affecting the normal conduct of the test. Additionally, existing devices lack effective measures to address the elongation of the fire hose due to water pressure, which may cause the fire hose to twist during the test. Therefore, a new type of fire hose abrasion resistance testing device that can solve the above problems is needed. Utility Model Content
[0003] The purpose of this invention is to provide a fire hose abrasion resistance testing device to solve the problems of unstable fire hose condition, friction belt displacement, poor sealing, and inability to effectively deal with fire hose extension in existing fire hose abrasion resistance testing devices, thereby improving the accuracy and reliability of test results.
[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:
[0005] A fire hose abrasion resistance testing device includes a test bench, a rotating water supply mechanism mounted on the test bench for driving the fire hose to rotate and providing test water, and a friction mechanism mounted on the test bench for applying reciprocating friction load to the fire hose. The rotating water supply mechanism includes a first rotating water supply component and a second rotating water supply component respectively disposed on the left and right sides of the friction mechanism. The first rotating water supply component and the second rotating water supply component are respectively fixedly engaged with the ends of the fire hose to keep the fire hose straight during the test.
[0006] Furthermore, the first rotating water supply assembly includes a first L-shaped base fixedly mounted on the test bench. A water inlet shaft is horizontally rotatably connected to the first L-shaped base via a bearing seat. A rubber sleeve is fitted on the inner end of the water inlet shaft, and a rotary joint for connecting to an external water circuit is fixedly connected to the outer end. The end of the fire hose is sealed and fixed on the rubber sleeve by a clamp.
[0007] Furthermore, the second rotating water supply component has the same structure as the first rotating water supply component. The bottom of the second L-shaped base of the second rotating water supply component is slidably guided by the first slide rail. The first slide rail is horizontally fixed on the test bench. The sliding function of the second rotating water supply component provides the movement distance for the fire hose to extend due to water pressure during the test.
[0008] Furthermore, a first motor is provided on the first L-shaped base. The first motor is driven and cooperates with the water inlet shaft through a synchronous belt pulley assembly. Water inlet holes are correspondingly provided in the water inlet shaft and the rotary joint.
[0009] Furthermore, the friction mechanism includes a vertically erected support and a second slide rail horizontally arranged on the support. A movable bearing plate is slidably guided on the second slide rail. Tensioning components for tensioning the friction belt are arranged on the front and rear sides of the movable bearing plate. A load applying component is arranged in the middle of the movable bearing plate. The load applying component is used to apply downward pressure to the friction belt and press the friction belt onto the fire hose. A reciprocating motion component is arranged on the side of the support. The reciprocating motion component drives the movable bearing plate to reciprocate left and right on the second slide rail.
[0010] Furthermore, the tensioning assembly includes a second motor and a third motor disposed on the front and rear sides of the top face of the movable support plate, and a second wheel and a third wheel respectively disposed on the output shaft of the second motor and the third wheel. The friction belt is installed between the second wheel and the third wheel. The second motor and the third motor adjust the speed and rotation direction so that the friction belt contacts the fire hose with a new sand belt each time it reciprocates.
[0011] Furthermore, the bottom of the second motor is slidably guided by the third slide rail, which is arranged in a front-to-back direction on the movable support plate. A spring is sleeved on the inner side of the third slide rail, and the spring is used to push the second motor outward to tighten the friction belt.
[0012] Furthermore, the load application assembly includes a weight, a load bar, and a pressure plate. The load bar is vertically and movably inserted through the middle of the movable support plate. The pressure plate is fixedly disposed at the lower end of the load bar. The friction band passes through the pressure plate from below. The weight is sleeved on the load bar and applies downward pressure to make the friction band contact the fire hose.
[0013] Furthermore, the reciprocating motion assembly includes a fourth motor, a cam disk, and a connecting rod. The fourth motor is fixed to the side of the support by a fixed seat. The fourth motor drives the cam disk to rotate, and the cam disk drives the movable support plate to reciprocate through the connecting rod.
[0014] Furthermore, the bottom of the support slides and guides with the fourth slide rail, which is arranged in a front-to-back direction on the test bench. The support is locked onto the fourth slide rail by a locking device, and the front-to-back adjustment of the support facilitates the replacement of the friction belt.
[0015] Compared with the prior art, the present invention has the following beneficial effects:
[0016] This invention uses a first rotating water supply component and a second rotating water supply component to fix and cooperate with the end of the fire hose, so that the fire hose remains straight during the test, avoiding the influence of hose twisting and other factors on the test results and improving the accuracy of the test results.
[0017] In this utility model, the second and third motors in the tensioning assembly adjust their speed and direction of rotation so that the friction belt contacts the fire hose with a new sand belt each time it reciprocates. At the same time, the spring pushes the second motor outward to tighten the friction belt, effectively solving the problem of friction belt misalignment and ensuring the reliability of the test.
[0018] This invention employs a sealing method using rubber sleeves and clamps, which ensures a good seal between the fire hose and the inlet shaft under high pressure, preventing water leakage and ensuring the normal conduct of the test.
[0019] The sliding function of the second rotating water supply component of this invention provides a range of motion for the fire hose to extend due to water pressure, avoiding twisting of the hose due to extension and ensuring the smooth progress of the test.
[0020] The fourth slide rail and locking element at the bottom of the support of this utility model allow the support to be adjusted back and forth, making it convenient to replace the friction belt and improving the ease of operation. Attached Figure Description
[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0022] Figure 1 This is a schematic diagram of the structure of this utility model;
[0023] Figure 2 This is a schematic diagram of the main component structure of this utility model;
[0024] Figure 3 This is a schematic diagram of the friction mechanism of this utility model;
[0025] Figure 4This is a schematic diagram of the friction mechanism of this utility model from another perspective;
[0026] Figure 5 This is a schematic diagram of the friction mechanism of this utility model from another perspective;
[0027] Figure 6 This is a schematic diagram of the structure of the first rotating water supply component of this utility model. Detailed Implementation
[0028] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0029] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "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 utility model 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 utility model.
[0030] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0031] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0032] like Figure 1-6As shown, the fire hose abrasion resistance testing device of this utility model includes a test bench, a rotating water supply mechanism set on the test bench for driving the fire hose 3 to rotate and providing test water, and a friction mechanism 4 set on the test bench for applying reciprocating friction load to the fire hose 3.
[0033] 1. Rotary water supply mechanism
[0034] The rotating water supply mechanism includes a first rotating water supply component 1 and a second rotating water supply component 2, respectively located on the left and right sides of the friction mechanism 4. The first rotating water supply component 1 and the second rotating water supply component 2 are fixedly engaged with the ends of the fire hose 3, ensuring that the fire hose 3 remains straight during the experiment. The core function of the rotating water supply mechanism is to drive the fire hose to rotate, simultaneously supplying the fire hose with the water required for the experiment. Furthermore, the fixed engagement of the two components with the ends of the fire hose ensures that the fire hose remains straight during the experiment, thereby improving the accuracy of the test results.
[0035] The first rotating water supply assembly 1 includes a first L-shaped base 11 fixedly mounted on a test bench. A water inlet shaft 12 is horizontally rotatably connected to the first L-shaped base 11 via a bearing seat 15. A rubber sleeve 13 is fitted on the inner end of the water inlet shaft 12, and a rotary joint 16 for connecting to an external water circuit is fixedly connected to the outer end. The end of the fire hose 3 is sealed and fixed to the rubber sleeve 13 by a clamp. The outer side of the rubber sleeve is fixed to the water inlet shaft 12 by a fixing nut 14. A first motor 17 is mounted on the first L-shaped base 11. The first motor 17 drives the water inlet shaft 12 via a synchronous pulley assembly 18. Water inlet holes are correspondingly provided in the water inlet shaft 12 and the rotary joint 16.
[0036] After the first motor starts, it transmits power to the inlet shaft via the synchronous belt pulley assembly, causing the inlet shaft to rotate. Since the end of the fire hose is sealed and fixed to the rubber sleeve fitted inside the inlet shaft by clamps, the rotation of the inlet shaft drives the fire hose to rotate as well. Simultaneously, water from the external water supply system enters the water inlet hole of the inlet shaft through the rotary joint and then flows into the fire hose, providing test water for the fire hose. The combination of the rubber sleeve and clamps provides a seal, preventing water leakage under high pressure and ensuring the normal conduct of the test.
[0037] The second rotating water supply component 2 has the same structure as the first rotating water supply component 1. The bottom of the second L-shaped base 21 of the second rotating water supply component 2 is slidably guided by the first slide rail 22. The first slide rail 22 is horizontally fixed on the test bench. The sliding function of the second rotating water supply component 2 provides the movement distance for the fire hose 3 to extend due to water pressure during the test.
[0038] During the test, the fire hose will extend due to internal water pressure. The second rotating water supply component can slide on the first slide rail, providing a range of motion for the fire hose to extend, avoiding twisting or other issues caused by the fire hose's inability to extend, and ensuring the stability of the fire hose during the test and the reliability of the test results.
[0039] 2. Friction Mechanism 4
[0040] The friction mechanism 4 includes a vertically erected support 401 and a second slide rail 402 horizontally mounted on the support 401. A movable bearing plate 403 is slidably guided on the second slide rail 402. Tensioning components for tensioning the friction belt 414 are provided on the front and rear sides of the movable bearing plate 403. A load applying component is provided in the middle of the movable bearing plate 403, which applies downward pressure to the friction belt 414 and presses it onto the fire hose 3. A reciprocating motion component is provided on the side of the support 401, which drives the movable bearing plate 403 to reciprocate left and right on the second slide rail 402. The main function of the friction mechanism 4 is to apply a reciprocating friction load to the fire hose, simulating the wear resistance of the fire hose during actual use.
[0041] The tensioning assembly includes a second motor 407 and a third motor 410 located on the front and rear sides of the top of the movable support plate 403, and a second roller 409 and a third roller 411 respectively located on the output shafts of the second motor 407 and the third motor 410. A friction belt 414 is installed between the second roller 409 and the third roller 411. The second motor 407 and the third motor 410 adjust their speed and rotation direction to ensure that the friction belt contacts the fire hose 3 with fresh sand belt with each reciprocation. The bottom of the second motor 407 slides and guides the third slide rail 408, which is arranged in a front-rear direction on the movable support plate 403. A spring is sleeved on the inner side of the third slide rail 408 to push the second motor 407 outward to tighten the friction belt 414.
[0042] The second and third motors, by adjusting their speed and direction of rotation, control the rotation of the second and third rollers. This ensures that the friction belt makes contact with the fire hose with a fresh portion of the sand belt each time it reciprocates, guaranteeing the accuracy and consistency of the friction test. A spring sleeve inside the third slide rail pushes the second motor outward, keeping the friction belt taut and preventing slackness or misalignment during operation. This ensures the friction belt can stably apply frictional load to the fire hose.
[0043] The load application assembly includes a weight 405, a load bar 404, and a pressure plate 406. The load bar 404 is vertically and movably inserted through the middle of the movable support plate 403. The pressure plate 406 is fixedly installed at the lower end of the load bar 404. The friction belt 414 passes through the pressure plate 406 from below. The weight 405 is sleeved on the load bar 404 and applies downward pressure to make the friction belt 414 contact the fire hose 3.
[0044] Weights are placed on a load bar, and their weight is transferred to a pressure plate through the load bar. The pressure plate then applies pressure to the friction belt, ensuring close contact between the friction belt and the fire hose. By changing the number of weights, the pressure exerted by the friction belt on the fire hose can be adjusted to simulate different real-world usage scenarios and meet various testing requirements.
[0045] Reciprocating motion assembly: includes a fourth motor 412, a cam disk 415 and a connecting rod 413. The fourth motor 412 is fixed to the side of the support 401 by a fixed seat. The fourth motor 412 drives the cam disk 415 to rotate. The cam disk 415 drives the movable support plate 403 to reciprocate through the connecting rod 413.
[0046] After the fourth motor starts, it drives the cam disc to rotate. The rotation of the cam disc is converted into the reciprocating motion of the movable support plate on the second slide rail via a connecting rod. Since the friction belt is installed on the movable support plate, the reciprocating motion of the movable support plate drives the friction belt to apply a reciprocating friction load to the fire hose, thereby realizing the test of the wear resistance of the fire hose.
[0047] In addition, the bottom of the support 401 is slidably guided to the fourth slide rail 416, which is set on the test bench in a front-to-back direction. The support 401 is locked to the fourth slide rail 416 by a locking member. The position of the support 401 can be adjusted back and forth to facilitate the replacement of the friction belt 414.
[0048] It also includes a water system that works in conjunction with this invention. The main components of the water system include a water tank, filter, plunger pump, pressure tank, safety valve, pressure sensor, electric regulating valve, and pneumatic valve. The functions of these components are respectively: storing water, filtering impurities, pressurizing, stabilizing pressure, providing safety protection, monitoring pressure, regulating water pressure, and controlling water flow direction. The water system is a technology known to those skilled in the art, and therefore will not be described in detail further.
[0049] The water system is connected to the inlet shaft 12 of the first rotating water supply assembly 1 via a rotary joint 16. Water flows into the fire hose 3 through the water inlet hole in the inlet shaft 12. At the same time, when the first motor 17 drives the inlet shaft 12 to rotate, the rotary joint 16 ensures that the water supply is continuous and uninterrupted. The sliding function of the second rotating water supply assembly 2 works in conjunction with the water system. When the fire hose 3 extends due to water pressure, the second L-shaped base 21 slides on the first slide rail 22 to avoid tensile stress from damaging the water connection parts (such as clamps and rubber sleeves 13) and to ensure the reliability of the high-pressure seal.
[0050] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
[0051] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. A fire hose abrasion resistance testing device, characterized in that, The test includes a test bench, a rotating water supply mechanism mounted on the test bench for driving the fire hose to rotate and providing test water, and a friction mechanism mounted on the test bench for applying reciprocating friction loads to the fire hose. The rotating water supply mechanism includes a first rotating water supply component and a second rotating water supply component respectively disposed on the left and right sides of the friction mechanism. The first rotating water supply component and the second rotating water supply component are fixedly engaged with the ends of the fire hose to keep the fire hose straight during the test.
2. The fire hose abrasion resistance testing device according to claim 1, characterized in that, The first rotating water supply assembly includes a first L-shaped base fixedly mounted on the test bench. A water inlet shaft is horizontally rotatably connected to the first L-shaped base via a bearing seat. A rubber sleeve is fitted on the inner end of the water inlet shaft, and a rotary joint for connecting to an external water circuit is fixedly connected to the outer end. The end of the fire hose is sealed and fixed on the rubber sleeve by a clamp.
3. The fire hose abrasion resistance testing device according to claim 2, characterized in that, The second rotating water supply component has the same structure as the first rotating water supply component. The bottom of the second L-shaped base of the second rotating water supply component is slidably guided by the first slide rail. The first slide rail is horizontally fixed on the test bench. The sliding function of the second rotating water supply component provides the movement distance for the fire hose to extend due to water pressure during the test.
4. The fire hose abrasion resistance testing device according to claim 3, characterized in that, The first L-shaped base is equipped with a first motor, which is driven by the water inlet shaft through a synchronous belt pulley assembly. The water inlet shaft and the rotary joint are respectively provided with water delivery holes.
5. The fire hose abrasion resistance testing device according to claim 4, characterized in that, The friction mechanism includes a vertically erected support and a second slide rail horizontally arranged on the support. A movable bearing plate is slidably guided on the second slide rail. Tensioning components for tensioning the friction belt are arranged on the front and rear sides of the movable bearing plate. A load applying component is arranged in the middle of the movable bearing plate. The load applying component is used to apply downward pressure to the friction belt and press the friction belt onto the fire hose. A reciprocating motion component is arranged on the side of the support. The reciprocating motion component drives the movable bearing plate to reciprocate left and right on the second slide rail.
6. The fire hose abrasion resistance testing device according to claim 5, characterized in that, The tensioning assembly includes a second motor and a third motor disposed on the front and rear sides of the top face of the movable support plate, and a second wheel and a third wheel disposed on the output shaft of the second motor and the third wheel respectively. The friction belt is installed between the second wheel and the third wheel. The second motor and the third motor adjust the speed and rotation direction so that the friction belt contacts the fire hose with a new sand belt each time it reciprocates.
7. The fire hose abrasion resistance testing device according to claim 6, characterized in that, The bottom of the second motor is slidably guided by the third slide rail, which is arranged in a front-to-back direction on the movable support plate. A spring is sleeved on the inner side of the third slide rail, and the spring is used to push the second motor outward to tighten the friction belt.
8. The fire hose abrasion resistance testing device according to claim 7, characterized in that, The load application assembly includes a weight, a load bar, and a pressure plate. The load bar is vertically and movably inserted through the middle of the movable support plate. The pressure plate is fixedly installed at the lower end of the load bar. The friction band passes through the pressure plate from below. The weight is sleeved on the load bar and applies downward pressure to make the friction band contact the fire hose.
9. The fire hose abrasion resistance testing device according to claim 8, characterized in that, The reciprocating motion assembly includes a fourth motor, a cam disk, and a connecting rod. The fourth motor is fixed to the side of the support by a fixed seat. The fourth motor drives the cam disk to rotate, and the cam disk drives the movable support plate to reciprocate through the connecting rod.
10. The fire hose abrasion resistance testing device according to claim 9, characterized in that, The bottom of the support slides and guides the fourth slide rail, which is arranged in a front-to-back direction on the test bench. The support is locked onto the fourth slide rail by a locking device. The front-to-back adjustment of the support facilitates the replacement of the friction belt.