Portable joint expansion device

Abstract

The utility model belongs to the field of fire hose installation equipment, and particularly provides a portable joint expansion device which comprises an installation frame, idler wheels are arranged at the bottom of the installation frame, an expansion tool and a driving unit are arranged on the installation frame, a spring expansion sleeve is arranged on the expansion tool in a matched mode, and the driving unit is connected with the spring expansion sleeve. The driving unit drives the expansion shaft to axially reciprocate at the expansion tool, so that the spring expansion sleeve is radially expanded to expand the water hose joint; according to the utility model, the miniature joint expansion device is arranged, so that the device can be conveniently placed on a fire fighting truck to be transported, and the device can be conveniently transported to a fire-fighting site and some road sections with obstacles by manpower through the rollers; meanwhile, firefighters can quickly fasten the water hose and the water hose connector through the device, the working intensity of the firefighters is reduced, the equipment preparation time is shortened, and the fire fighting working efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the field of fire-fighting water pipe installation equipment, and specifically provides a portable joint expansion and tightening device. Background Art

[0002] A fire hose is a flexible pipe used to transport flame-retardant liquids such as high-pressure water or foam. The traditional fire hose has a rubber lining and a linen woven fabric on the outside. The new generation of fire hoses is made of polymer materials such as polyurethane. There are metal joints at both ends of the fire hose, which can be connected to another hose to extend the distance or to a nozzle to increase the liquid spray pressure.

[0003] The existing internal expansion fire hose and the metal joints of the hose are generally tightened using special equipment in the factory before leaving the factory. In actual firefighting work, the joint part of the hose is prone to damage under long-term high-pressure working conditions. The internal expansion fire hose cannot be manually tightened and repaired by winding a steel wire like a conventional hose, but requires the use of special tightening equipment to tighten the joint. However, the special equipment is generally set up in the factory building. Due to the size and weight, it is inconvenient to move and cannot be transported to the site for use. As a result, the internal expansion hose can only be connected to the joint in the factory, and the connection work between the internal expansion hose and the joint cannot be completed on site, which is very inconvenient. For example, when the internal expansion hose falls off or is damaged on site, the internal expansion hose can only be returned to the factory for reassembly after the firefighting operation is completed. Therefore, there is an urgent need for a joint tightening device that can be used by firefighters at the fire scene so as to complete the connection work between the internal expansion hose and the joint on site. Utility Model Content

[0004] The utility model provides a portable joint expansion device, which is particularly suitable for internal expansion fire hoses. The device can be conveniently transported to a fire scene and followed by firefighters who enter the fire scene. The firefighters can directly use the device to quickly tighten the hoses and joints.

[0005] The technical solution of the utility model is as follows:

[0006] A portable joint expansion device comprises a mounting frame, a roller is arranged at the bottom of the mounting frame, an expansion tool and a driving unit are arranged on the mounting frame, a spring expansion sleeve is arranged at the expansion tool, and the driving unit drives the expansion shaft to reciprocate axially at the expansion tool, so that the spring expansion sleeve radially expands and expands the water hose joint.

[0007] In this solution, by configuring a tightening fixture and a drive unit, and arranging a spring expansion sleeve at the tightening fixture, the drive unit can drive the tightening shaft to axially reciprocate at the tightening fixture, so that the spring expansion sleeve can expand radially. This can not only achieve the purpose of tightening the water hose joint, but also greatly reduce the volume of the joint expansion device, and realize the miniaturization of the joint expansion device, so that the device can be placed on a fire truck and transported to the scene, and the device can be transported and transferred to a suitable position at the scene by rollers for use by firefighters, which is very convenient.

[0008] To facilitate miniaturization of the device, preferably, the expansion fixture includes a mounting convex ring, on which is provided a slot for snapping a water supply belt joint, and the diameter of the expansion shaft gradually increases along the axis toward the outside of the mounting frame, and the driving unit includes a hydraulic pump, an oil cylinder and a battery module, and the end of the expansion shaft with a smaller shaft diameter is arranged in the oil cylinder.

[0009] In this solution, firefighters can directly transport the device with the fire transport vehicle and push it to the appropriate location, and can use the device for installation and expansion. First, place the limit ring on the spring expansion sleeve, the water hose covers the limit ring, and then place the water hose joint installed on the outermost side. The drive unit directly drives the expansion shaft to move in the direction of the smaller end of the shaft diameter, so that the expansion shaft diameter at the limit ring gradually increases, and then the spring expansion sleeve becomes larger, and finally the spring expansion sleeve radially expands the limit ring. By expanding the limit ring inside the water hose, the limit ring presses the water hose firmly against the inner wall of the metal water hose joint from the water hose part, realizing the tightening of the water hose and the metal joint, allowing firefighters to quickly install the fire hose at the fire scene.

[0010] It should be noted that the maximum shaft diameter of the expansion shaft will not exceed the inner diameter of the water hose joint, and the minimum outer diameter of the spring expansion sleeve will not exceed the initial diameter of the limit ring. This can ensure that the water hose joint can be smoothly buckled on the installation convex ring and can be smoothly removed after the water hose is expanded.

[0011] Preferably, the oil cylinder is a bidirectional oil cylinder, and two sets of the expansion fixtures are symmetrically arranged on the mounting frame.

[0012] In this solution, the oil cylinder can be set to be bidirectional, and one power unit can provide power for two workstations, further reducing the size of the device. The oil cylinder controls the expansion shaft on one side to be retracted to the end with a smaller shaft diameter, and the expansion shaft on the opposite side will extend to the end with a larger shaft diameter. When there are expansion fixtures at both ends, the expansion fixture at one end can expand the hose joint, and the other end can be pre-installed and connected with the hose and hose joint that need to be expanded; the expanded hose joint at one end is unloaded, and the hose joint at the other end can be expanded. When multiple hoses need to be expanded, using this solution can further increase the installation and expansion rate. On this basis, the joint models and sizes matched by the expansion fixtures at both ends can also be different, thereby improving the adaptability of the device.

[0013] Preferably, a control module is provided on the mounting frame for controlling the action and pressure of the hydraulic pump, and a power socket connected to the battery module is provided on the mounting frame.

[0014] In this solution, the control module can realize the automatic extension and retraction of the expansion shaft, and automatically complete the actions of contracting and tightening the expansion shaft and then extending and retracting the spring expansion sleeve. There is no need for firefighters to manually control it step by step, further improving the efficiency of joint expansion.

[0015] Preferably, the mounting frame is covered with a shell, a display screen is provided on the shell, and the display screen is electrically connected to the control module.

[0016] In this solution, the outer shell can prevent smoke, dust and debris from falling into the device at the fire scene, affecting the performance of the device and easily causing safety hazards. At the same time, a display screen is set on the outer shell, which can display the performance parameters of the internal device for easy observation and maintenance.

[0017] Preferably, heat dissipation holes communicating with the interior of the mounting frame are arranged around the outer shell.

[0018] Preferably, a plurality of sets of induction switches are arranged on the mounting protrusion around the axis of the tightening hole, and the induction switches are electrically connected to the control module. When the water hose connector contacts the mounting protrusion, the induction switches are triggered; when all the induction switches are triggered, the hydraulic pump is activated.

[0019] In this solution, only when the hose joint is completely fitted onto the expansion fixture can the induction switch be triggered to start the hydraulic pump to work. Multiple induction switches need to be triggered to make the hydraulic pump work, which can ensure that the axis of the hose joint coincides with the axis of the expansion fixture, without any area that is not in contact and without any gaps, effectively reducing the occurrence of safety accidents.

[0020] Preferably, the roller is provided with a braking structure.

[0021] Preferably, a push rod is slidably provided on the mounting frame and can be pulled out from the mounting frame, so as to facilitate the manual transfer of the device.

[0022] Preferably, a sponge cushion is installed on the top of the shell, and the sponge cushion is supported by the mounting frame.

[0023] In this solution, since the overall height of the equipment does not exceed 1m, it is tiring and inconvenient for firefighters to operate it while standing. Firefighters can ride on the device and operate it in a more comfortable and convenient posture, which can also further improve the tightening efficiency.

[0024] Beneficial effects of the utility model:

[0025] The utility model is convenient for being arranged in a fire truck for transportation by arranging a miniaturized joint expansion device, and can also be conveniently transported to a fire scene by manpower through rollers, and can enter some road sections with obstacles; at the same time, firefighters can also use the device to quickly tighten the water hose and the water hose joint, thereby reducing the work intensity of firefighters, reducing the equipment preparation time, and improving the efficiency of firefighting work. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solution of the present invention, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 It is an internal stereogram of the utility model;

[0028] Figure 2 It is a three-dimensional diagram of the utility model;

[0029] Figure 3 For this utility model Figure 1 The enlarged view of point A in the middle;

[0030] Figure 4 It is a three-dimensional diagram of the second embodiment of the present utility model.

[0031] In the above drawings, the corresponding reference numerals are as follows:

[0032] 1-mounting frame, 11-roller, 12-expansion tooling, 121-mounting convex ring, 122-expansion shaft, 123-slot, 124-spring expansion sleeve, 13-induction switch, 2-drive unit, 21-hydraulic pump, 22-cylinder, 3-housing, 31-display screen, 32-heat dissipation holes, 33-push rod, 34-sponge cushion, 4-water hose joint. DETAILED DESCRIPTION

[0033] In conjunction with the accompanying drawings, the technical solution of the present invention is clearly and completely described through the specific implementation methods of the embodiments of the present invention.

[0034] Embodiment 1:

[0035] like Figure 1 and Figure 3A portable joint expansion device is shown, including a mounting frame 1, a roller 11 is arranged at the bottom of the mounting frame 1, and an expansion tool 12 and a driving unit 2 are arranged on the mounting frame 1. The expansion tool 12 is matched with a spring expansion sleeve 124. The driving unit 2 drives the expansion shaft 122 to axially reciprocate at the expansion tool 12, so that the spring expansion sleeve 124 radially expands and expands the water hose joint.

[0036] Furthermore, the expansion tool 12 includes an installation protrusion ring 121, and a slot 123 for snapping the water supply belt connector 4 is provided on the installation protrusion ring 121. The diameter of the expansion shaft 122 gradually increases along the axis toward the outside of the mounting frame 1. The driving unit 2 includes a hydraulic pump 21, an oil cylinder 22 and a battery module. The end of the expansion shaft 122 with a smaller shaft diameter is arranged in the oil cylinder 22.

[0037] Specifically, firefighters can directly transport the device with the fire transport vehicle and push it to a suitable position, first place the limit ring on the spring expansion sleeve 124, the water hose covers the limit ring, and then place the water hose joint 4 set on the outermost side, and then the driving unit 2 directly drives the tightening shaft 122 to move in the direction of the smaller end axially, so that the axial diameter of the tightening shaft 122 at the limit ring gradually increases, and then the spring expansion sleeve 124 here becomes larger, and finally the spring expansion sleeve 124 radially expands the limit ring, and by expanding the limit ring inside the water hose, the limit ring presses the water hose firmly against the inner wall of the metal water hose joint 4 from the inside of the water hose, thereby achieving the tightening of the water hose and the metal joint, allowing firefighters to quickly install the fire hose at the fire scene.

[0038] It should be noted that the maximum shaft diameter of the expansion shaft 122 will not exceed the inner diameter of the water hose joint 4, and the minimum outer diameter of the spring expansion sleeve 124 will not exceed the initial diameter of the limiting ring. This can ensure that the water hose joint 4 can be smoothly buckled on the installation convex ring 121 and can be smoothly removed after the water hose is tightened.

[0039] Meanwhile, the hydraulic pump can also be directly replaced by a small pump station, and the cylinder shaft of the oil cylinder 22 is coaxially connected to the expansion shaft 122 through a conversion joint. The hydraulic pump can provide sufficient power to ensure that the hose joint 4 can be fully expanded. The battery module can be set to have a small battery. When an external power supply cannot be connected, the device is powered by the small battery. When an external power supply is available, the power supply can be connected through a wire plug, which can power the device and charge the small battery at the same time.

[0040] Furthermore, the mounting frame 1 is provided with a control module for controlling the action and pressure of the hydraulic pump, and the mounting frame is provided with a power socket for connecting the battery module.

[0041] Specifically, by programming the control module in advance, the automatic extension and retraction of the expansion shaft 122 can be achieved, and the actions of contracting and expanding the expansion shaft 122 and then extending and retracting the spring expansion sleeve 124 can be automatically completed. There is no need for firefighters to manually control it step by step, which further improves the tightening efficiency of the joint. At the same time, the power plug is an aviation plug, and the plug can be used to connect the wires to the external AC power.

[0042] Further, such as Figure 2 As shown, the mounting frame 1 is surrounded by a shell 3, on which a display screen 31 is arranged, and the display screen 31 is electrically connected to the control module. The shell 3 can prevent smoke and dust from the fire scene from falling into the device, thereby affecting the performance of the device and causing safety hazards. At the same time, a display screen 31 is arranged on the shell 3, and the display screen 31 can display the performance parameters of the internal device, such as the pressure value of the hydraulic pump, the working status of the device, etc. By observing the data on the display screen 31, the overall situation of the device can be judged, which is convenient for observation and maintenance.

[0043] Furthermore, heat dissipation holes 32 communicating with the interior of the mounting frame 1 are arranged around the housing 3 to discharge heat generated by the driving device.

[0044] Furthermore, a plurality of sensor switches 13 are arranged on the mounting protrusion 121 around the axis of the expansion hole, and the sensor switches 13 are electrically connected to the control module. When the water hose connector 4 contacts the mounting protrusion 121, the sensor switches 13 are triggered; when all the sensor switches 13 are triggered, the hydraulic pump is activated.

[0045] Specifically, only when the water hose joint 4 is completely attached to the expansion fixture 12, can the induction switch 13 be triggered to start the hydraulic pump to work. Multiple induction switches 13 need to be triggered to make the hydraulic pump work, which can ensure that the axis of the water hose joint 4 coincides with the axis of the expansion fixture 12, without any area that is not in contact and no gap, effectively reducing the occurrence of safety accidents.

[0046] Furthermore, the roller 11 is provided with a braking structure, and the roller 11 is locked by the braking structure, so that the device can be prevented from moving when the firefighters use the device.

[0047] Furthermore, a push rod 33 is slidably provided on the mounting frame 1, and the push rod 33 can be pulled out from the mounting frame 1. This facilitates the manpower transfer of the device. At the same time, handrails are also provided on both sides of the mounting frame to facilitate the lifting of the device on and off the vehicle.

[0048] Furthermore, a sponge cushion 34 is installed on the top of the shell 3 , and the sponge cushion 34 is supported by the mounting frame 1 .

[0049] Specifically, since the overall height of the equipment does not exceed 1m, it is tiring and inconvenient for firefighters to operate while standing. Therefore, by providing a sponge pad 34, firefighters can ride on the device and operate in a more comfortable and convenient posture, which can also further improve the tightening efficiency.

[0050] It needs to be explained again that the device is particularly suitable for internal expansion fire hoses, such as forest fire hoses.

[0051] The specific use process of this device in this embodiment is as follows:

[0052] After the firefighters transport the device to a suitable location, they start the brake structure of the roller 11 to fix the device; when the hose and hose connector 4 need to be installed, the firefighters put the hose connector 4 into the hose, and then sit on the device, put the limit ring on the position of the spring expansion sleeve 124 (the spring expansion sleeve 124 is not opened in the initial state of the expansion shaft 122), the hose is opened so that the inner diameter of the hose covers the limit ring, and then the hose connector 4 is buckled on the installation convex ring 121. When the hose connector 4 is completely buckled on the installation convex ring 121, the induction switch 13 is triggered, and the drive device automatically expands after a delay of a few seconds.

[0053] During the expansion process, the hydraulic pump drives the oil cylinder 22 to move, driving the expansion shaft 122 to move toward the end of the small diameter. During the movement, the diameter of the expansion shaft 122 at the position of the limit ring gradually increases, and the spring expansion sleeve 124 begins to expand, so that the spring expansion sleeve 124 expands, and the limit ring expands from the inner diameter of the limit ring to the outside, and finally the limit ring expands inside the water hose, so that the limit ring presses the water hose firmly against the inner wall of the metal water hose joint 4 from the inside of the water hose, so as to achieve the fastening of the water hose and the metal joint. Subsequently, the hydraulic pump drives the oil cylinder 22 to move in the reverse direction to extend the expansion shaft 122, and the spring expansion sleeve 124 retracts and recovers, so that the water hose joint 4 with the expanded water hose can be removed.

[0054] Embodiment 2:

[0055] Different from the first embodiment, Figure 4 As shown, the oil cylinder 22 in this embodiment is a bidirectional oil cylinder 22, and two groups of the expansion fixtures 12 are symmetrically arranged on the mounting frame 1, and other arrangements and use methods are the same.

[0056] Specifically, the oil cylinder 22 is set to be bidirectional. The oil cylinder 22 controls the expansion shaft 122 at one end to be retracted to the end with a small shaft diameter, and the expansion shaft 122 at the opposite end will extend to the end with a large shaft diameter. When there are expansion fixtures 12 at both ends, the expansion fixture 12 at one end can expand the water hose joint 4, and the other end can be installed and connected in advance with the water hose and water hose joint 4 to be expanded; the expanded water hose joint 4 at one end is unloaded, and the water hose joint 4 at the other end can be expanded. When multiple water hoses need to be expanded, this solution can further increase the installation and expansion speed.

[0057] Another implementation of this embodiment may be: the connector models and sizes matched by the expansion fixtures 12 at both ends may also be different, that is, the size of the mounting ring of the expansion fixture 12 and the axial diameter change rate of the expansion shaft 122 at both ends are different, so that one device can install and expand water pipe connectors with two axial diameters, thereby improving the applicability of the entire device.

[0058] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of protection claimed by the utility model.

Claims

1. A portable joint expansion device, characterized in that: The invention comprises a mounting frame (1), a roller (11) being arranged at the bottom of the mounting frame (1), an expansion tool (12) and a driving unit (2) being arranged on the mounting frame (1), a spring expansion sleeve (124) being arranged in cooperation with the expansion tool (12), and the driving unit (2) driving the expansion shaft (122) to axially reciprocate at the expansion tool (12), so that the spring expansion sleeve (124) radially expands and expands the water hose joint.

2. A portable joint expansion device according to claim 1, characterized in that: The expansion tool (12) comprises a mounting convex ring (121), the mounting convex ring (121) is provided with a slot (123) for buckling a water supply belt joint (4), the diameter of the expansion shaft (122) gradually increases along the axis toward the outside of the mounting frame (1), the drive unit (2) comprises a hydraulic pump (21), an oil cylinder (22) and a battery module, and the end of the expansion shaft (122) with a smaller shaft diameter is arranged in the oil cylinder (22).

3. A portable joint expansion device according to claim 2, characterized in that: The oil cylinder (22) is a bidirectional oil cylinder, and two groups of the expansion tools (12) are symmetrically arranged on the mounting frame (1).

4. A portable joint expansion device according to claim 2 or 3, characterized in that: The mounting frame (1) is provided with a control module for controlling the action and pressure of the hydraulic pump (21), and the mounting frame is provided with a power socket for connecting the battery module.

5. A portable joint expansion device according to claim 4, characterized in that: The mounting frame (1) is covered with a shell (3), the shell (3) is provided with a display screen (31), and the display screen is electrically connected to the control module.

6. A portable joint expansion device according to claim 5, characterized in that: Heat dissipation holes (32) communicating with the interior of the mounting frame (1) are arranged around the outer shell (3).

7. A portable joint expansion device according to claim 4, characterized in that: A plurality of groups of induction switches (13) are circumferentially arranged on the mounting convex ring (121), the induction switches (13) being electrically connected to the control module, and when the water hose connector (4) contacts the mounting convex ring (121), the induction switches (13) are triggered; when all the induction switches (13) are triggered, the hydraulic pump (21) is activated.

8. A portable joint expansion device according to claim 1, characterized in that: The roller (11) is provided with a braking structure.

9. A portable joint expansion device according to claim 1, characterized in that: A pull-out push rod (33) is slidably disposed on the mounting frame (1), and the push rod (33) can be pulled out of the mounting frame (1).

10. A portable joint expansion device according to claim 5, characterized in that: A sponge cushion (34) is installed on the top of the shell (3), and the sponge cushion (34) is supported by the mounting frame (1).

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