Fire hose pressure test automation equipment

Abstract

The utility model discloses a kind of fire hose pressure test automation equipment, it is related to fire detection technical field;The equipment includes rack, feeding roller frame, rubber roll guiding mechanism, front end sealing and water injection mechanism, high-pressure water supply system and control system;Its innovation is, front end sealing and water injection mechanism have adopted by hydraulic drive's bladder perfusion pipe assembly and negative pressure adsorption flattening device;When working, first by negative pressure chuck flattening flat fire hose, then perfusion pipe inserts inside water hose, hydraulic bladder fills oil and expands, from inside tightly holds water hose, again through mechanical pullback action, water hose end surface is pressed on horn mouth sealing ring, to realize reliable sealing before high-pressure test;The utility model solves the problem that traditional flange sealing efficiency is low, consistency is poor, easy to damage water hose, realizes the full automation, high efficiency and non-destructive of fire hose pressure test, sealing is reliable, and good adaptability.

Description

Technical Field

[0001] This utility model relates to the technical field of fire equipment testing equipment, and in particular to an automated device for pressure resistance testing of fire hoses. Background Technology

[0002] Fire hoses are crucial equipment in firefighting and rescue operations, and their pressure resistance directly affects the safety and effectiveness of firefighting operations. Therefore, they must undergo rigorous pressure resistance testing before leaving the factory. Currently, pressure resistance testing of fire hoses typically uses end-face flange sealing. This method has several drawbacks: First, the hose is flat when dry, making it extremely tedious and inefficient to manually fit its end onto the flange and align the bolt holes. Second, relying on manual bolt tightening results in inconsistent sealing and carries the risk of the hose coming off or leaking under high pressure due to insufficient bolt preload, or the hose end being damaged by excessive preload. Finally, the entire process has low automation, high labor intensity, and is difficult to adapt to large-scale, high-efficiency production and testing cycles. Therefore, there is an urgent need for a new type of pressure resistance testing equipment that can automatically adapt to the flat state of the water hose, provide reliable and non-destructive sealing, and operate in a fully automated manner. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and provide an automated fire hose pressure resistance testing device that is novel in structure, reliable in sealing, highly automated, and does not damage the hose.

[0004] To address the aforementioned problems, this utility model provides an automated device for testing the pressure resistance of fire hoses. The device includes a frame, on which are sequentially arranged a feeding roller frame, a rubber roller guiding mechanism, a front-end sealing and water injection mechanism, a high-pressure water supply system, and a hydraulic control system. A rolled fire hose is mounted on the feeding roller frame. The rubber roller guiding mechanism includes a rubber roller pressing component and a pair of auxiliary and main rubber rollers arranged vertically. The rubber roller pressing component presses the upper auxiliary rubber roller against the lower main rubber roller. The front end of the fire hose is wound around the auxiliary and main rubber rollers and extends to the front-end sealing and water injection mechanism. The front-end sealing and water injection mechanism includes a fixing plate, a negative pressure adsorption flattening device, and a hydraulic bladder-type injection pipe assembly. The fixing plate is erected on the frame and has a tapered hole, with the larger diameter side of the tapered hole facing the direction of the fire hose. The negative pressure adsorption and flattening device includes an upward negative pressure head and a downward negative pressure head symmetrically arranged vertically, with the water hose traveling between the upward and downward negative pressure heads; the hydraulic bladder-type injection tube assembly is mounted on the frame via a precision linear slide and is located on the side of the fixed plate facing away from the water hose; the hydraulic bladder-type injection tube assembly includes a hollow central tube and a hydraulic bladder assembly, the hydraulic bladder assembly including an annular bladder, the annular bladder being fixed to the outer peripheral wall of the front end of the central tube, and the annular bladder having an embedded reinforcing layer; a hydraulic oil channel communicating with the inner cavity of the annular bladder is opened in the tube wall of the central tube, and the rear end of the central tube is connected to the high-pressure water supply system; the hydraulic control system includes a miniature electric hydraulic pump connected to the rear end of the hydraulic oil channel via a pipeline.

[0005] Furthermore, this utility model provides an automated device for testing the pressure resistance of fire hoses, wherein an annular groove is formed on the inner wall of the conical hole, and a first sealing ring is embedded in the annular groove.

[0006] Furthermore, this utility model provides an automated device for testing the pressure resistance of fire hoses, wherein the annular bladder is made of polyurethane or hydrogenated nitrile rubber, and the reinforcing layer is an aramid fiber woven layer or a steel wire woven mesh.

[0007] Furthermore, the present invention provides an automated device for testing the pressure resistance of fire hoses, wherein an annular groove is formed circumferentially on the outer surface of the annular bladder, and a second annular sealing ring is embedded in the annular groove.

[0008] Furthermore, this utility model provides an automated device for testing the pressure resistance of fire hoses, wherein the upward negative pressure head is equipped with a cylinder a, the cylinder a is fixed to the frame by a gantry, and the upward negative pressure head is connected to an external negative pressure generator through an air pipe; the downward negative pressure head is equipped with a cylinder b, the cylinder b is installed on the lower side of the gantry, and the downward negative pressure head is connected to an external negative pressure generator through an air pipe.

[0009] Furthermore, this utility model provides an automated device for testing the pressure resistance of fire hoses, wherein the rubber roller guiding mechanism includes a gantry frame, the gantry frame is mounted on the machine frame, a downward pressing cylinder is provided at the upper end of the gantry frame, the piston rod end of the downward pressing cylinder is fixed to the auxiliary rubber roller through a frame, and the two ends of the rotating shaft of the main rubber roller pass through the gantry frame; the frame includes a transverse support plate, and the two ends of the transverse support plate are respectively bent downward to form support arms, and the two ends of the rotating shaft of the auxiliary rubber roller are respectively supported by the two support arms; the front end of the hose passes through the frame, meanders through the gap between the auxiliary rubber roller and the main rubber roller, and finally extends around the main rubber roller to the fixed plate.

[0010] Furthermore, the present invention provides an automated device for testing the pressure resistance of fire hoses, wherein the device further includes a drainage system, which includes a water collection tank located below the device, and the water collection tank is connected to the water tank of the high-pressure water supply system to form a circulation loop.

[0011] Compared with existing technologies, the automated equipment for testing the pressure resistance of fire hoses disclosed in this application has the following advantages: 1. Automation and high efficiency: By automatically conveying the water belt with the drive roller, automatically flattening the negative pressure head, and automatically anchoring and sealing the hydraulic bladder, the entire process from loading and unloading to test completion is automated, which greatly improves the testing efficiency. 2. Innovative sealing method: The core of this utility model lies in the use of a hydraulic bladder as the sealing actuator; its working process is as follows: first, a flat water hose is inserted and then hydraulically expanded, so that the annular bladder expands radially evenly and makes soft contact with the inner wall of the water hose over the entire area. Then, it is mechanically pulled back to press the end face of the water hose onto the first sealing ring of the conical hole. This method of "expanding and anchoring first, then mechanically pressing and sealing" perfectly solves the problem of the difficulty in sealing flat water hoses. 3. Reliable and undamaged sealing: Hydraulic expansion provides uniform radial clamping force, avoiding stress concentration and protecting the hose liner. The reinforcing layer constrains the bladder to mainly generate radial deformation, providing huge and controllable anchoring force to ensure that the hose will never be pulled off during high-pressure testing. The final end face seal is guaranteed by mechanical force, with extremely high reliability. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of an automated equipment for testing the pressure resistance of fire hoses according to this utility model.

[0013] The components include: 1. Frame; 2. Feeding roller frame; 3. High-pressure water supply system; 4. Water hose; 5. Auxiliary rubber roller; 6. Main rubber roller; 7. Fixing plate; 8. Conical hole; 9. First sealing ring; 10. Lifting negative pressure head; 11. Pulling negative pressure head; 12. Precision linear slide; 13. Central tube; 14. Annular bladder; 15. Second sealing ring; 16. Miniature electric hydraulic pump; 17. Water collection tank; 18. Cylinder a; 19. Gantry; 20. Cylinder b; 21. Pressing cylinder; 22. Horizontal support plate; 23. Support arm. Detailed Implementation

[0014] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments and accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0015] In the description of this application, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the equipment or component 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 application. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0016] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0017] like Figure 1As shown, this embodiment provides an automated device for testing the pressure resistance of fire hoses, which includes a frame 1. The frame 1 is sequentially equipped with a feeding roller frame 2, a rubber roller guiding mechanism, a front-end sealing and water injection mechanism, a high-pressure water supply system 3, a hydraulic control system, and a drainage system. A rolled fire hose 4 is mounted on the feeding roller frame 2. The rubber roller guiding mechanism includes a rubber roller pressing assembly and a pair of auxiliary rubber rollers 5 and a main rubber roller 6 arranged vertically. The rubber roller pressing assembly is used to press the upper auxiliary rubber roller 5 tightly against the lower main rubber roller 6. The front end of the fire hose 4 is wound around the auxiliary rubber roller 5 and the main rubber roller. 6. Extending to the front-end sealing and water injection mechanism, the front-end sealing and water injection mechanism includes a fixed plate 7, a negative pressure adsorption and leveling device, and a hydraulic bladder-type injection pipe assembly; the fixed plate 7 is erected on the frame 1, the fixed plate 7 has a conical hole 8, the larger diameter side of the conical hole 8 faces the direction of the water hose 4, and an annular groove is formed on the inner wall of the conical hole 8, in which a first sealing ring 9 is embedded; the negative pressure adsorption and leveling device includes an upward lifting negative pressure head 10 and a downward pulling negative pressure head 11 symmetrically arranged, the water hose 4 travels through the upward lifting negative pressure head 10 and the downward pulling negative pressure head 11. The hydraulic bladder infusion tube assembly is mounted on the frame 1 via a precision linear slide 12 and is located on the side of the fixing plate 7 facing away from the water hose 4. The hydraulic bladder infusion tube assembly includes a hollow central tube 13 and a hydraulic bladder assembly. The hydraulic bladder assembly includes an annular bladder 14, which is fixed to the outer peripheral wall of the front end of the central tube 13. The annular bladder 14 has an embedded reinforcing layer made of polyurethane or hydrogenated nitrile rubber, and the reinforcing layer is an aramid fiber braided layer or... The annular bladder 14 has a circumferential groove on its outer surface, and a second annular sealing ring 15 is embedded in the groove. A hydraulic oil channel communicating with the inner cavity of the annular bladder 14 is formed inside the wall of the central tube 13, and the rear end of the central tube 13 is connected to the high-pressure water supply system 3. The hydraulic control system includes a miniature electric hydraulic pump 16 connected to the rear end of the hydraulic oil channel via a pipeline. The drainage system includes a water collection tank 17 located below the equipment, which is connected to the water tank of the high-pressure water supply system 3 to form a circulation loop. In this embodiment, the upward negative pressure head 10 is equipped with a cylinder a18, which is fixed to the frame 1 via a gantry 19. The upward negative pressure head 10 is connected to an external negative pressure generator via an air pipe. The downward negative pressure head 11 is equipped with a cylinder b20, which is installed on the lower side of the gantry 19. The downward negative pressure head 11 is connected to an external negative pressure generator via an air pipe. The rubber roller guiding mechanism includes a gantry frame 20, which is mounted on the frame 1. A pressing cylinder 21 is mounted on the upper end of the gantry frame 20. The piston rod end of the pressing cylinder 21 is fixed to the auxiliary rubber roller 5 through a frame. The two ends of the rotating shaft of the main rubber roller 6 pass through the gantry frame 20. The frame includes a transverse support plate 22. The two ends of the transverse support plate 22 are bent downward to form support arms 23. The two ends of the rotating shaft of the auxiliary rubber roller 5 are supported by the two support arms 23 respectively. The front end of the water hose 4 passes through the frame, meanders through the gap between the auxiliary rubber roller 5 and the main rubber roller 6, and finally extends around the main rubber roller 6 to the fixed plate 7.

[0018] The working process and principle of the automated fire hose pressure resistance testing equipment provided in this embodiment are as follows: The operator loads the rolled fire hose 4 onto the feeding roller frame 2, and manually guides the end of the fire hose 4 through the auxiliary rubber roller 5 and the main rubber roller 6, placing it in front of the conical hole 8. The test is initiated, and the lowering cylinder 21 presses down the auxiliary rubber roller 5, pressing the fire hose 4 tightly against the main rubber roller 6 to achieve a seal at the rear end of the fire hose 4. The upward-lifting negative pressure head 10 moves downward under the action of cylinder a18 and contacts the upper side wall of the fire hose 4. The downward-pulling negative pressure head 11 moves upward under the action of cylinder b20 and contacts the lower side wall of the fire hose 4. The negative pressure generator is activated to hold the end of the fire hose 4. Cylinder a18 lifts the negative pressure head 10, and cylinder b20 pulls down the negative pressure head 11, unfolding the fire hose 4. The precision linear slide 12 moves, pushing the unexpanded hydraulic bladder injection tube assembly through the conical hole 8 and inserting it into the fire hose 4. The PLC controls the micro-electric... The hydraulic pump 16 injects high-pressure oil into the annular bladder 14. The pressure value is monitored and controlled in a closed loop by the oil pressure sensor. The annular bladder 14 expands uniformly and clamps the inner wall of the water hose 4 through the second sealing ring 15. After clamping, the precision linear slide 12 moves in the opposite direction, pulling the hydraulic bladder injection tube assembly and the water hose 4 backward until the end face of the water hose 4 is tightly pressed onto the first sealing ring 9 of the conical hole 8. The high-pressure water supply system 3 starts and injects water into the water hose 4 according to the preset pressure curve, maintains pressure, and monitors it. After the test is completed, the water circuit is depressurized first. Then, the micro electric hydraulic pump 16 slowly releases the oil pressure in the annular bladder 14, the annular bladder 14 contracts, the precision linear slide 12 moves backward, and the end of the central tube 13 is separated from the water hose 4. The system is reset and awaits the next test.

[0019] Any aspects not detailed in this application are well-known to those skilled in the art.

[0020] The preferred embodiments of this application have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this application without inventive effort. Therefore, any technical solutions that can be obtained by those skilled in the art based on the concept of this application through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. An automated device for testing the pressure resistance of fire hoses, characterized in that, The system includes a frame, on which are sequentially arranged a feeding roller frame, a rubber roller guiding mechanism, a front-end sealing and water injection mechanism, a high-pressure water supply system, and a hydraulic control system. A rolled water hose is mounted on the feeding roller frame. The rubber roller guiding mechanism includes a rubber roller pressing assembly and a pair of auxiliary and main rubber rollers arranged vertically. The rubber roller pressing assembly presses the upper auxiliary rubber roller against the lower main rubber roller. The front end of the water hose winds around the auxiliary and main rubber rollers and extends to the front-end sealing and water injection mechanism. The front-end sealing and water injection mechanism includes a fixing plate, a negative pressure adsorption and leveling device, and a hydraulic bladder-type injection pipe assembly. The fixing plate is erected on the frame and has a tapered hole, with the larger diameter side of the tapered hole facing the water hose. The negative pressure adsorption and leveling device includes symmetrically arranged upper and lower components... The system includes an upward-lifting negative pressure head and a downward-pulling negative pressure head, with the water hose traveling between the two. The hydraulic bladder-type injection tube assembly is mounted on the frame via a precision linear slide and is located on the side of the fixed plate facing away from the water hose. The hydraulic bladder-type injection tube assembly includes a hollow central tube and a hydraulic bladder assembly. The hydraulic bladder assembly includes an annular bladder that covers and is fixed to the outer peripheral wall of the front end of the central tube, and the annular bladder has an embedded reinforcing layer. A hydraulic oil channel communicating with the inner cavity of the annular bladder is opened in the tube wall of the central tube, and the rear end of the central tube is connected to the high-pressure water supply system. The hydraulic control system includes a miniature electric hydraulic pump connected to the rear end of the hydraulic oil channel via a pipeline.

2. The automated equipment for testing the pressure resistance of fire hoses according to claim 1, characterized in that, An annular groove is formed on the inner wall of the tapered hole, and a first sealing ring is embedded in the annular groove.

3. The automated equipment for testing the pressure resistance of fire hoses according to claim 1, characterized in that, The annular capsule is made of polyurethane or hydrogenated nitrile rubber, and the reinforcing layer is an aramid fiber woven layer or a steel wire woven mesh.

4. An automated fire hose pressure resistance testing device according to claim 1 or 3, characterized in that, A circumferential groove is formed on the outer surface of the annular bladder, and a second annular sealing ring is embedded in the groove.

5. The automated equipment for testing the pressure resistance of fire hoses according to claim 1, characterized in that, The upward negative pressure head is equipped with a cylinder a, which is fixed to the frame by a gantry. The upward negative pressure head is connected to an external negative pressure generator through an air pipe. The downward negative pressure head is equipped with a cylinder b, which is installed on the lower side of the gantry. The downward negative pressure head is connected to an external negative pressure generator through an air pipe.

6. The automated equipment for testing the pressure resistance of fire hoses according to claim 1, characterized in that, The rubber roller guiding mechanism includes a gantry frame mounted on the machine frame. A downward pressing cylinder is installed at the upper end of the gantry frame. The piston rod end of the downward pressing cylinder is fixed to the auxiliary rubber roller through a frame. The two ends of the rotating shaft of the main rubber roller pass through the gantry frame. The frame includes a transverse support plate. The two ends of the transverse support plate are bent downward to form support arms. The two ends of the rotating shaft of the auxiliary rubber roller are respectively supported by the two support arms. The front end of the water hose passes through the frame, meanders through the gap between the auxiliary rubber roller and the main rubber roller, and finally extends around the main rubber roller to the fixed plate.

7. The automated equipment for testing the pressure resistance of fire hoses according to claim 1, characterized in that, The device also includes a drainage system, which includes a water collection tank located below the device, and the water collection tank is connected to the water tank of the high-pressure water supply system to form a circulation loop.

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