Turnover type water hose take-up and pay-off device and water hose fire fighting truck

Abstract

The utility model relates to a turnover type water hose take-up and pay-off device and a water hose fire fighting truck. The turnover type water hose take-up and pay-off device comprises a hose arranging mechanism, a hose take-up mechanism and a turnover mechanism. The rear end of the belt collecting mechanism is rotatably installed at the front end of the belt arranging mechanism and located above the belt arranging mechanism. The turnover mechanism comprises a telescopic driving part. The two ends of the telescopic driving part are connected with the belt arranging mechanism and the belt collecting mechanism correspondingly, and the telescopic driving part is used for driving the front end of the belt collecting mechanism to overturn upwards or downwards around the joint between the belt collecting mechanism and the belt arranging mechanism. And the working state of the turnover type water hose winding and unwinding device is switched to a lifting state in which the front end of the hose winding mechanism is inclined upwards or a winding state in which the hose winding mechanism is transversely arranged on the hose arranging mechanism. By means of the overturning mechanism, the working state of the overturning type water hose winding and unwinding device can be switched to the lifting state, at the moment, the space below the hose winding mechanism is large, maintenance of a cabin of a whole vehicle is facilitated, and the water hose fire fighting truck is more convenient to maintain and use.

Description

Technical Field

[0001] The utility model relates to the technical field of water hose fire fighting vehicles, in particular to a flip-over type water hose retracting and releasing device and a water hose fire fighting vehicle. Background Art

[0002] The hose fire truck is a special-purpose fire truck, which is mainly used to provide fire hoses for rescue to the main combat fire truck, and recycle the hoses and store them in a standby state after the rescue. It includes a movable walking chassis, a front of the vehicle, a hose storage compartment, and a hose laying and collecting mechanism. A hose management device is arranged below the hose laying and collecting mechanism. During fire rescue, the operator opens the hose storage compartment, takes out the hose, and places one end of the hose at the first working position (such as the fire water source supply point). As the hose fire truck moves, the hose in the hose storage compartment is laid along the road to the second working position (such as the rescue fire extinguishing location), completing the laying of the hose. After the rescue is completed, the hose fire truck moves from the first working position to the second working position (or vice versa), and through the hose laying and collecting mechanism, the hose management device and other components, the hoses are orderly recovered and stored in the hose storage compartment for the next use.

[0003] In traditional fire trucks, the hose retractable mechanism is usually designed as a front-to-back retractable structure to ensure the working range of the hose retractable mechanism and the length of the vehicle when traveling. However, this telescopic hose retractable mechanism is usually located directly above the front of the vehicle, close to the front of the vehicle, while the engine compartment is located below the front of the vehicle. Since the hose retractable mechanism limits the range of movement of the entire vehicle front in the height direction, the maintenance space of the engine compartment is very small, which greatly increases the difficulty of engine compartment maintenance. Utility Model Content

[0004] Based on this, it is necessary to provide a flip-type water hose retracting and releasing device and a water hose fire truck that can reduce the difficulty of engine compartment maintenance.

[0005] A flip-over type water hose retracting and releasing device, comprising:

[0006] The belt management mechanism is used to be installed on the body of the hose fire truck;

[0007] A tape collection mechanism, the rear end of which is rotatably mounted on the front end of the tape arrangement mechanism and is located above the tape arrangement mechanism;

[0008] The flipping mechanism includes a telescopic driving member; the two ends of the telescopic driving member are respectively connected to the belt sorting mechanism and the belt taking-up mechanism, and are used to drive the front end of the belt taking-up mechanism to flip upward or downward around the connection between the belt taking-up mechanism and the belt sorting mechanism, so as to switch the working state of the flip-type water hose taking-up and unwinding device to a lifted state in which the front end of the belt taking-up mechanism is tilted upward or a retracted state in which the belt taking-up mechanism is placed horizontally on the belt sorting mechanism.

[0009] In one of the embodiments, it also includes a support block; the support block is fixed to the front end of the belt arranging mechanism and is used to support the belt taking-up mechanism when the flip-type water hose taking-up and unwinding device is in the retracted state.

[0010] In one of the embodiments, it also includes a connecting piece; a first connecting block is fixed on both sides of the left and right sides of the belt taking-up mechanism; a second connecting block is fixed on both ends of the left and right sides of the support block; when the flip-type water hose taking-up and releasing device is in a retracted state, the connecting piece is detachably connected to the first connecting block and the second connecting block respectively, so as to detachably connect the belt taking-up mechanism and the support block.

[0011] In one of the embodiments, an elastic pad is provided on the upper surface of the support block.

[0012] In one embodiment, the telescopic drive component is a hydraulic cylinder; the flipping mechanism also includes a flipping oil tank, a manual hydraulic pump, a manual reversing valve, a liquid supply pipeline and a liquid return pipeline; one end of the liquid supply pipeline and the liquid return pipeline are connected to the flipping oil tank, and the other end is respectively connected to the liquid inlet and oil return port of the manual reversing valve; the two working oil ports of the manual reversing valve are respectively connected to the rod chamber and the rodless chamber of the hydraulic cylinder.

[0013] In one embodiment, the flipping mechanism further includes an overflow pipe provided with an overflow valve; one end of the overflow pipe is connected to the position of the liquid supply pipeline located between the manual hydraulic pump and the manual reversing valve, and the other end is connected to the return liquid pipeline.

[0014] In one of the embodiments, a one-way valve is provided on the liquid supply pipeline.

[0015] In one embodiment, the rear end of the belt taking-up mechanism has a first rotation connection point and a second rotation connection point; the front end of the belt sorting mechanism has a first rotation installation point and a second rotation installation point; the first rotation connection point and the second rotation installation point are rotationally connected; the second rotation connection point and the second rotation installation point are respectively rotationally connected to the two ends of the telescopic driving member; in the longitudinal direction of the belt sorting mechanism, the second rotation connection point is located at the end of the second rotation installation point away from the first rotation connection point.

[0016] In one embodiment, the first rotation connection point is rotationally connected to the first rotation installation point via a pin.

[0017] A water hose fire truck is characterized by comprising a vehicle body and the flip-over type water hose retracting and releasing device as described above; the belt arranging mechanism is installed on the top of the vehicle body.

[0018] The above-mentioned flip-over type water hose retractable belt device and water hose fire truck, the belt management mechanism is installed on the vehicle body to form a water hose fire truck, and the front of the water hose fire truck is located directly below the belt management mechanism. When it is necessary to perform maintenance on the entire vehicle cabin of the water hose fire truck, it is only necessary to use the flip mechanism to switch the working state of the flip-over type water hose retractable belt device to the lifting state. At this time, the front end of the belt management mechanism is tilted upward relative to the horizontal plane, which can ensure that the front of the water hose fire truck can be freely flipped to facilitate the maintenance of the vehicle cabin, and at the same time greatly improve the maintenance space of the lateral movement and belt management drive actuator, which is easy to maintain; when it is not necessary to perform maintenance on the entire vehicle cabin of the water hose fire truck, it is only necessary to use the flip mechanism to switch the working state of the flip-over type water hose retractable belt device to the retracted state, so as to facilitate the normal driving, belt collection and release of the water hose fire truck. Therefore, the setting of the above-mentioned flip-over type water hose retractable belt device makes the maintenance of the water hose fire truck more convenient and the use more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the flip-type water hose retracting and releasing device in a preferred embodiment of the utility model in a retracted state;

[0020] Figure 2 It is a structural schematic diagram of the flip-type water hose retracting and unretracting device in a preferred embodiment of the utility model in a lifted state;

[0021] Figure 3 for Figure 1 A front view of the flip-type water hose retracting and unretracting device shown;

[0022] Figure 4 for Figure 2 A front view of the flip-type water hose retracting and unretracting device shown;

[0023] Figure 5 for Figure 1 and Figure 2 The schematic diagram of the structure of the flipping mechanism in the flipping type water hose retracting and releasing device is shown.

[0024] Explanation of reference numerals: 100, flip-type water hose retracting and releasing device; 110, belt organizing mechanism; 111, first rotation installation point; 112, second rotation installation point; 120, belt retracting mechanism; 121, first rotation connection point; 122, second rotation connection point; 130, flip mechanism; 131, telescopic drive member; 132, flip oil tank; 133, manual hydraulic pump; 134, manual reversing valve; 135, liquid supply pipeline; 136, liquid return pipeline; 137, overflow pipe; 138, overflow valve; 139, one-way valve; 140, support block; 150, first connecting block; 151, mounting hole; 160, second connecting block; 161, threaded connection hole; 170, elastic pad; 180, pin. DETAILED DESCRIPTION

[0025] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively with reference to the accompanying drawings. The accompanying drawings provide preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0027] When describing positional relationships, unless otherwise specified, when an element is referred to as being "on" another element, it can be directly on the other element or there can be an intermediate element. It is also understood that when an element is referred to as being "between" two elements, it can be the only one between the two elements, or there can be one or more intermediate elements.

[0028] In the case of using “including”, “having”, and “comprising” described herein, another component may be added unless a clear limiting term such as “only”, “consisting of”, etc. is used. Unless mentioned otherwise, a term in the singular form may include a plural form and should not be understood as being one in number.

[0029] In addition, the drawings are not drawn to a 1:1 scale, and the relative sizes of the elements in the drawings are drawn only as examples and not necessarily according to the true scale.

[0030] The utility model provides a flip-over type water hose retractable belt device and a water hose fire truck, wherein the water hose fire truck comprises a vehicle body and a flip-over type water hose retractable belt device, wherein the water hose retractable belt device is installed on the vehicle body.

[0031] The vehicle body includes a running chassis, a vehicle head and a belt storage compartment. The flip-type water hose retracting and releasing device can be directly installed on the belt storage compartment, or installed on the running chassis through a supporting structure, or one end can be installed on the running chassis through a supporting structure and the other end can be installed on the belt storage compartment.

[0032] Of course, it can be understood that in other embodiments, the flip-type water hose retracting and unreeling device can also be arranged on other water hose vehicles that need to lay and retract the hose.

[0033] Figure 1 and Figure 2 The structure of the flip-over type water hose retracting and releasing device in different working states in one embodiment of the utility model is shown. For the convenience of description, the accompanying drawings only show the structure related to the embodiment of the utility model.

[0034] See also Figures 1 to 4 In a preferred embodiment of the utility model, the flip-type water hose retractable and retractable device 100 includes a belt management mechanism 110 , a belt retracting mechanism 120 and a flipping mechanism 130 .

[0035] The belt management mechanism 110 is used to be installed on the body of the hose fire truck. In the hose fire truck, the belt management mechanism 110 is installed on the body to realize the installation of the flip-type hose retractable belt device 100 on the hose fire truck.

[0036] The rear end of the belt taking-up mechanism 120 is rotatably mounted on the front end of the belt arranging mechanism 110 and is located above the belt arranging mechanism 110. It should be explained that the front end and the rear end here are based on the front and rear of the hose fire truck, that is, the front and rear directions of the hose arranging mechanism 110 and the belt taking-up mechanism 120 are consistent with the front and rear directions of the hose fire truck, the front end of the belt arranging mechanism 110 is the end of the belt arranging mechanism 110 close to the front of the vehicle, and the rear end of the belt taking-up mechanism 120 is the end of the belt taking-up mechanism 120 close to the rear of the vehicle.

[0037] The flip mechanism 130 includes a telescopic driving member 131. The two ends of the telescopic driving member 131 are respectively connected to the tape arranging mechanism 110 and the tape taking-up mechanism 120, and are used to drive the front end of the tape taking-up mechanism 120 to flip upward or downward around the connection between the tape taking-up mechanism 120 and the tape arranging mechanism 110, so as to switch the working state of the flip type water hose taking-up and putting-out device 100 to a state where the front end of the tape taking-up mechanism 120 is tilted upward and lifted up, or a state where the tape taking-up mechanism 120 is horizontally placed on the tape arranging mechanism 110 and retracted.

[0038] The telescopic driving member 131 may be a hydraulic cylinder, a hydraulic cylinder, an electric cylinder, a scissor-type telescopic mechanism, etc., as long as it can provide power for the flipping of the belt taking-up mechanism 120 .

[0039] In the water hose fire truck, the belt arrangement mechanism 110 is installed on the vehicle body, and the front of the water hose fire truck is located directly below the belt collection mechanism 120. When the whole vehicle cabin of the water hose fire truck needs to be maintained, it is only necessary to use the flip mechanism 130 to switch the working state of the flip-type water hose retracting and releasing belt device 100 to the lifting state. At this time, the front end of the retracting belt mechanism 120 is tilted upward relative to the horizontal plane to ensure that the front of the water hose fire truck can be freely flipped, so as to facilitate the maintenance of the vehicle cabin, and at the same time greatly improve the maintenance space of the lateral movement and belt arrangement drive actuator, which is easy to maintain; when the whole vehicle cabin of the water hose fire truck does not need to be maintained, it is only necessary to use the flip mechanism 130 to switch the working state of the flip-type water hose retracting and releasing belt device 100 to the retracted state, so as to facilitate the normal driving, belt collection and release of the water hose fire truck. Therefore, the setting of the above-mentioned flip-type water hose retracting and releasing belt device 100 makes the maintenance of the water hose fire truck more convenient and the use more convenient.

[0040] In some embodiments, the flip-type water hose take-up and pay-out device 100 further includes a support block 140. The support block 140 is fixed to the front end of the belt-arranging mechanism 110, and is used to support the belt-receiving mechanism 120 when the flip-type water hose take-up and pay-out device 100 is in the retracted state. Specifically, the support block 140 is located at one end of the telescopic driving member 131 away from the rotational connection between the belt-arranging mechanism 110 and the belt-receiving mechanism 120, so as to facilitate a good support effect on the belt-receiving mechanism 120.

[0041] The support block 140 mainly plays a supporting and limiting role to ensure that the belt taking-up mechanism 120 can maintain the same direction as the belt organizing mechanism 110 in the retracted state, and avoid the belt taking-up mechanism 120 from flipping downward excessively when switching from the raised state to the retracted state, thereby improving the reliability and safety of the flip-type water hose taking-up and releasing device 100.

[0042] Specifically, the support block 140 is a long strip structure, and the support block 140 is transversely fixed to the front end of the belt arrangement mechanism 110 to ensure a better support effect on the belt collection mechanism 120 in the retracted state. More specifically, the support block 140 is a hollow tubular structure or a rod-shaped structure, such as a rectangular steel pipe, square steel, U-shaped steel or other hollow structures of other forms and materials, so as to achieve the purpose of reducing the weight of the flip-type water hose retracting and releasing device 100.

[0043] Further, in some embodiments, the flip-type water hose retractable belt device 100 further includes a connecting member (not shown). The first connecting block 150 is fixed to both left and right sides of the belt retracting mechanism 120. The second connecting block 160 is fixed to both left and right ends of the support block 140. When the flip-type water hose retractable belt device 100 is in the retracted state, the connecting member is detachably connected to the first connecting block 150 and the second connecting block 160, respectively, so as to detachably connect the belt retracting mechanism 120 and the support block 140. Among them, the connecting member can be a detachable connecting member such as a threaded fastener, a lock buckle, and a buckle.

[0044] When the flip-type water hose retractable belt device 100 is in the retracted state, the retractable belt mechanism 120 is placed on the support block 140. At this time, the first connecting block 150 on the retractable belt mechanism 120 is at least partially aligned with the second connecting block 160 on the same side and is detachably connected by a connecting piece, so as to fix the retractable belt mechanism 120 on the belt arrangement mechanism 110, so as to reduce the probability of the retractable belt mechanism 120 shaking during the driving, retracting and laying of the water hose fire truck, improve the structural stability of the flip-type water hose retractable belt device 100 in the retracted state, and make the retracting and laying of the water hose fire truck more stable. When it is necessary to switch the working state of the flip-type water hose retractable belt device from the retracted state to the raised state, it is only necessary to remove the connecting piece and use the flip mechanism 130 to drive the retractable belt mechanism 120 to flip upward, which is convenient and quick to use.

[0045] Specifically, the connecting member is a threaded connecting member, a mounting hole 151 is opened on the first connecting block 150, and a threaded connecting hole 161 is opened on the second connecting block 160. One end of the threaded connecting member is passed through the mounting hole 151, and the other end is screwed into the threaded connecting hole 161 to detachably connect the first connecting block 150 and the second connecting block 160.

[0046] Furthermore, in some embodiments, an elastic pad 170 is provided on the upper surface of the support block 140. When the flip-type water hose retractable and retractable device 100 is in the retracted state, the elastic pad 170 is located between the belt retracting mechanism 120 and the support block 140, so the elastic member is mainly used to reduce shock and the impact force on the support block 140 when the belt retracting mechanism 120 is flipped downward, to avoid the belt retracting mechanism 120 from colliding with the support block 140 when flipping downward, which helps to extend the service life of the belt retracting mechanism 120 and reduce the noise when the state is switched, and also can reduce the vibration and noise of the belt retracting mechanism 120 caused by uneven road surface during the driving of the water hose fire truck.

[0047] Specifically, there are two elastic pads 170, which are respectively fixed to the left and right ends of the support block 140. More specifically, the elastic pad 170 is an L-shaped structure, with one end of the elastic pad 170 fixed to the support block 140 and the other end leaning against the second connecting block 160 on the same side to protect the ground and sides of the belt take-up mechanism 120.

[0048] Please also read Figure 5 In some embodiments, the telescopic driving member 131 is a hydraulic cylinder. The flip mechanism 130 further includes a flip oil tank 132, a manual hydraulic pump 133, a manual reversing valve 134, a liquid supply pipeline 135, and a liquid return pipeline 136. One end of the liquid supply pipeline 135 and the liquid return pipeline 136 are both connected to the flip oil tank 132, and the other end is respectively connected to the liquid inlet and the oil return port of the manual reversing valve 134. The two working oil ports of the manual reversing valve 134 are respectively connected to the rod chamber and the rodless chamber of the hydraulic cylinder.

[0049] The flip oil tank 132 is an independent oil tank from the hydraulic system of the whole vehicle, and is a dedicated oil tank for the telescopic drive member 131, that is, the entire flip mechanism 130 has a drive system independent of the whole vehicle, and the independent drive system is an independent hydraulic system including the flip oil tank 132, the manual hydraulic pump 133, the manual reversing valve 134, the liquid supply pipeline 135 and the liquid return pipeline 136. During the use of the hose fire truck, even if there is a problem with the whole vehicle, the independent drive system can ensure that the belt take-up mechanism 120 can be lifted, thereby improving the reliability and safety of the hose fire truck.

[0050] Furthermore, in some embodiments, the flip mechanism 130 further includes an overflow pipe 137 provided with an overflow valve 138. One end of the overflow pipe 137 is connected to the position of the liquid supply pipeline 135 between the manual hydraulic pump 133 and the manual reversing valve 134, and the other end is connected to the liquid return pipeline 136. In actual use, when the liquid pressure in the liquid supply pipeline 135 exceeds a preset value, the overflow valve 138 will automatically open to discharge a portion of the liquid in the liquid supply pipeline 135 into the liquid return pipeline 136, so that the pressure in the liquid supply pipeline 135 does not exceed the allowable value, thereby ensuring that the entire flip mechanism 130 will not cause an accident due to excessive transport capacity, and further improving the use safety of the flip type water hose retracting and unreeling device 100.

[0051] Furthermore, in some embodiments, a one-way valve 139 is provided on the liquid supply pipeline 135. The one-way valve 139 may be one or more. When there are more than one one-way valves 139, they are respectively provided at the liquid inlet pipeline end and the liquid outlet pipeline end of the manual hydraulic pump 133. The provision of the one-way valve 139 can prevent the reverse flow of the liquid in the liquid supply pipeline 135 and the reflux of the liquid in the hydraulic cylinder to the liquid supply pipeline 135 when the manual hydraulic pump 133 is not working, thereby further improving the safety and reliability of the hose fire truck.

[0052] In some embodiments, the rear end of the belt receiving mechanism 120 has a first rotation connection point 121 and a second rotation connection point 122. The front end of the belt sorting mechanism 110 has a first rotation installation point 111 and a second rotation installation point 112. The first rotation connection point 121 and the second rotation installation point 112 are rotationally connected. The second rotation connection point 122 and the second rotation installation point 112 are rotationally connected to the two ends of the telescopic driving member 131 respectively. In the longitudinal direction of the belt sorting mechanism 110, the second rotation connection point 122 is located at the end of the second rotation installation point 112 away from the first rotation connection point 121.

[0053] It can be seen that on the vertical plane, the second rotating connection point 122, the second rotating installation point 112 and the first rotating connection point 121 are distributed in a triangle. Therefore, when the flip-type water hose retractable belt device 100 is in a raised state, the telescopic drive member 131 is tilted upward relative to the driving direction of the water hose fire truck to form a triangular support structure with the belt taking-up mechanism 120 and the belt sorting mechanism 110 respectively, thereby ensuring the structural stability of the belt taking-up mechanism 120 in the raised state, and further improving the safety and reliability of the flip-type water hose retractable belt device 100.

[0054] Further, in some embodiments, the first rotation connection point 121 and the first rotation installation point 111 are rotationally connected via a pin 180. Therefore, both the first rotation connection point 121 and the first rotation installation point 111 are provided with a through hole or a threaded hole, and the pin 180 cooperates with the through hole or the threaded hole to achieve a rotatable connection.

[0055] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0056] The above embodiments only express several implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that, for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A flip-over type hose retracting and releasing device, characterized in that: include: The belt management mechanism is used to be installed on the body of the hose fire truck; A tape collection mechanism, the rear end of which is rotatably mounted on the front end of the tape arrangement mechanism and is located above the tape arrangement mechanism; The flipping mechanism includes a telescopic driving member; the two ends of the telescopic driving member are respectively connected to the belt sorting mechanism and the belt taking-up mechanism, and are used to drive the front end of the belt taking-up mechanism to flip upward or downward around the connection between the belt taking-up mechanism and the belt sorting mechanism, so as to switch the working state of the flip-type water hose taking-up and unwinding device to a lifted state in which the front end of the belt taking-up mechanism is tilted upward or a retracted state in which the belt taking-up mechanism is placed horizontally on the belt sorting mechanism.

2. The flip-over type water hose retracting and releasing device according to claim 1 is characterized in that: It also includes a support block; the support block is fixed to the front end of the belt arranging mechanism and is used to support the belt taking-up mechanism when the flip-type water hose taking-up and unwinding device is in the retracted state.

3. The flip-over type water hose retracting and releasing device according to claim 2 is characterized in that: It also includes a connecting piece; a first connecting block is fixed on both sides of the left and right sides of the belt taking-up mechanism; a second connecting block is fixed on both ends of the left and right ends of the support block; when the flip-type water hose taking-up and releasing device is in a retracted state, the connecting piece is detachably connected to the first connecting block and the second connecting block respectively, so as to detachably connect the belt taking-up mechanism and the support block.

4. The flip-over type water hose retracting and releasing device according to claim 2, characterized in that: An elastic pad is arranged on the upper surface of the support block.

5. The flip-over type water hose retracting and releasing device according to claim 1, characterized in that: The telescopic drive component is a hydraulic cylinder; the flipping mechanism also includes a flipping oil tank, a manual hydraulic pump, a manual reversing valve, a liquid supply pipeline and a liquid return pipeline; one end of the liquid supply pipeline and the liquid return pipeline are connected to the flipping oil tank, and the other end is respectively connected to the liquid inlet and oil return port of the manual reversing valve; the two working oil ports of the manual reversing valve are respectively connected to the rod chamber and the rodless chamber of the hydraulic cylinder.

6. The flip-over type water hose retracting and releasing device according to claim 5, characterized in that: The turnover mechanism also includes an overflow pipe provided with an overflow valve; one end of the overflow pipe is connected to the position of the liquid supply pipeline located between the manual hydraulic pump and the manual reversing valve, and the other end is connected to the liquid return pipeline.

7. The flip-over type water hose retracting and releasing device according to claim 5, characterized in that: A one-way valve is arranged on the liquid supply pipeline.

8. The flip-over type water hose retracting and releasing device according to claim 1, characterized in that: The rear end of the belt taking-up mechanism has a first rotating connection point and a second rotating connection point; the front end of the belt sorting mechanism has a first rotating installation point and a second rotating installation point; the first rotating connection point and the second rotating installation point are rotatably connected; the second rotating connection point and the second rotating installation point are respectively rotatably connected to the two ends of the telescopic driving member; in the longitudinal direction of the belt sorting mechanism, the second rotating connection point is located at the end of the second rotating installation point away from the first rotating connection point.

9. The flip-over type water hose retracting and releasing device according to claim 8, characterized in that: The first rotation connection point is rotationally connected to the first rotation installation point via a pin.

10. A hose fire truck, characterized in that: It comprises a vehicle body and a flip-over type water hose retracting and releasing device as claimed in any one of claims 1 to 9; the belt arranging mechanism is installed on the top of the vehicle body.

Images