Boom fluid supply system and fire truck

Abstract

The present invention provides a boom liquid supply system and a fire truck. The boom liquid supply system includes: a telescopic arm, including a plurality of boom units that can be relatively telescopic; a telescopic tube, connected to the plurality of boom units, the telescopic tube is connected to a liquid supply device; a liquid supply regulating device, the liquid supply regulating device is connected to the telescopic tube; wherein the liquid supply regulating device is used to regulate the liquid flow direction or on-off between the liquid supply regulating device and the telescopic tube according to the telescopic length of the telescopic tube or the pressure in the telescopic tube. In the boom liquid supply system provided by the present invention, the telescopic arm is telescopic and drives the telescopic tube to telescopic. The liquid supply regulating device regulates the liquid flow direction or on-off between the liquid supply regulating device and the telescopic tube according to the telescopic length of the telescopic tube or the pressure in the telescopic tube, thereby realizing the synchronization of the telescopic arm action and the water pumping action, and the telescopic arm action and the water return action. Compared with the related art in which the telescopic arm action and the water pumping action are performed separately, it greatly saves time and is conducive to improving the rescue efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of fire trucks, and in particular to a boom liquid supply system and a fire truck. Background Art

[0002] At present, in fire trucks with structures such as telescopic arms and telescopic tubes, the telescopic arm movement and the water-pumping movement are performed separately during operation. That is, when the telescopic arm is extending or retracting, water cannot enter the telescopic tube, and when water flows into the telescopic tube, the telescopic arm cannot be extended or retracted. Since the telescopic arm movement and the water-pumping movement cannot be performed at the same time, there is a problem of wasting time, which in turn affects the rescue efficiency. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art or related art.

[0004] To this end, a first aspect of the present invention provides a boom liquid supply system.

[0005] A second aspect of the present invention provides a fire truck.

[0006] In view of this, a first aspect of the present invention provides an arm liquid supply system, comprising: a telescopic arm, comprising a plurality of relatively telescopic arm units; a telescopic tube, connected to the plurality of arm units, the telescopic tube being connected to a liquid supply device; a liquid supply regulating device, the liquid supply regulating device being connected to the telescopic tube; wherein the liquid supply regulating device is used to regulate the flow direction or on-off of the liquid between the liquid supply regulating device and the telescopic tube according to the telescopic length of the telescopic tube or the pressure in the telescopic tube.

[0007] The arm support liquid supply system provided by the present invention comprises a telescopic arm, a telescopic tube and a liquid supply regulating device, wherein the telescopic arm comprises a plurality of relatively telescopic arm support units, the plurality of relatively telescopic arm support units are used to adjust the telescopic distance of the telescopic arm, the telescopic tube is connected with the arm support unit, so that the telescopic arm can drive the telescopic tube to synchronously extend and retract when the telescopic arm is extended and retracted, the telescopic tube is connected with the liquid supply device, that is, the liquid supply device supplies water and foam to the telescopic tube, and the liquid supply device can be an existing structure of a fire truck or other vehicles, and the liquid supply regulating device is connected with the telescopic tube, so that in the process of the telescopic arm extending and retracting and driving the telescopic tube to synchronously extend and retract, the liquid supply regulating device adjusts the liquid supply according to the telescopic tube. The telescopic length or the pressure in the telescopic tube is adjusted by the liquid supply regulating device and the telescopic tube. The liquid flow direction or on-off of the liquid between the liquid supply regulating device and the telescopic tube is realized, thereby realizing that during the telescopic arm extension and retraction process, under the action of the liquid supply regulating device, liquid and foam flow from the liquid supply regulating device into the telescopic tube to realize the water pumping action, or the water in the telescopic tube flows back to the liquid supply regulating device under the action of the liquid supply regulating device to realize the water return action, that is, the telescopic arm action and the water pumping action, the telescopic arm action and the water return action are carried out synchronously. Compared with the related art in which the telescopic arm action and the water pumping action are carried out separately, it greatly saves time, is conducive to improving rescue efficiency, and improves the market competitiveness of products.

[0008] At the same time, by adding a liquid supply regulating device, the telescopic arm movement and the water pumping movement, the telescopic arm movement and the water return movement can be synchronized. The structure is simple, the control is convenient, and it is suitable for popularization and application.

[0009] Specifically, on the one hand, when the telescopic arm is extended and drives the telescopic tube to be extended, the extension length of the telescopic tube increases, so that the volume of the telescopic tube increases to form a vacuum, thereby generating negative pressure in the telescopic tube. When the negative pressure value reaches the preset water pumping pressure, under the action of the liquid supply regulating device, liquid and foam flow from the liquid supply regulating device into the telescopic tube to realize the water pumping action, thereby realizing the synchronous extension of the telescopic arm and the water pumping action, effectively saving time and greatly improving the rescue efficiency.

[0010] On the other hand, when the telescopic arm retracts and drives the telescopic tube to retract synchronously, the extended length of the telescopic tube decreases, and the pressure inside the telescopic tube increases (pressure holding). When the pressure reaches the reflux preset pressure, under the action of the liquid supply regulating device, a part of the liquid or foam remaining in the telescopic tube flows back to the liquid supply regulating device to realize the reflux action.

[0011] In addition, the boom liquid supply system in the above technical solution provided by the present invention may also have the following additional technical features:

[0012] In the above technical solution, it further includes: a connecting pipe, one end of which is connected to the liquid supply regulating device, and the other end is connected to the telescopic pipe; a valve body, which is arranged on the connecting pipe; wherein the telescopic length of the telescopic pipe or the pressure in the telescopic pipe is used to adjust the opening or on-off of the valve body.

[0013] In this technical solution, the boom liquid supply system includes a connecting pipe and a valve body. The connecting pipe is connected to the liquid supply regulating device and the telescopic tube. The valve body is arranged on the connecting pipe. The opening or on-off of the valve body is automatically adjusted by the telescopic length of the telescopic tube or the pressure in the telescopic tube, thereby realizing the on-off adjustment of the liquid between the telescopic tube and the liquid supply regulating device. The structure is simple, the cost is low, and it is suitable for popularization and application.

[0014] Specifically, when multiple arm units move to extend the telescopic arm, and then drive the telescopic tube to extend, the extension length of the telescopic tube increases, so that the volume of the telescopic tube increases. When the pressure in the telescopic tube decreases to form a vacuum, negative pressure is generated in the telescopic tube. When the negative pressure value reaches the preset water pumping pressure, the valve body automatically opens to connect the liquid supply regulating device and the telescopic tube. At this time, liquid and foam flow into the telescopic tube through the liquid supply regulating device to realize the water pumping action, thereby realizing the synchronous extension of the telescopic arm and the water pumping action, effectively saving time and greatly improving the rescue efficiency.

[0015] Specifically, on the one hand, the opening or on-off of the valve body is adjusted according to the telescopic length of the telescopic tube, and on the other hand, the opening or on-off of the valve body is adjusted according to the pressure in the telescopic tube, thereby expanding the application scope of the product. Among them, on the one hand, the telescopic length of the telescopic tube or the pressure in the telescopic tube can adjust the opening of the valve body, and on the other hand, the telescopic length of the telescopic tube or the pressure in the telescopic tube can adjust the on-off of the valve body, which can meet the needs of different valve body structures and has a wide range of applications.

[0016] In the above technical solution, it further includes: a pressure detection device, which is connected to the connecting pipe between the valve body and the telescopic tube; a control device, which is connected to the pressure detection device and the valve body, and is used to control the movement of the valve body according to the detection signal of the pressure detection device to connect or disconnect the telescopic tube and the liquid supply regulating device.

[0017] In this technical solution, the boom liquid supply system also includes a pressure detection device and a control device. The pressure detection device is connected to the connecting pipe between the valve body and the telescopic tube, that is, the pressure detection device is used to detect the pressure in the connecting pipe between the valve body and the telescopic tube. The control device is connected to the pressure detection device and the valve body, and is used to control the movement of the valve body according to the detection signal of the pressure detection device to connect or disconnect the telescopic tube and the liquid supply regulating device, thereby realizing the on-off regulation of the liquid between the telescopic tube and the liquid supply regulating device. The structure is simple, the cost is low, and it is suitable for popularization and application.

[0018] Specifically, when the telescopic arm retracts, the telescopic tube retracts synchronously. At this time, the length of the telescopic tube decreases, and the pressure inside the telescopic tube increases (pressure buildup). When the pressure detection device detects that the pressure in the connecting tube between the valve body and the telescopic tube reaches the preset reflux pressure, the control device controls the valve body to connect the telescopic tube and the liquid supply regulating device according to the detection signal of the pressure detection device, and a part of the liquid and foam remaining in the telescopic tube flows back to the liquid supply regulating device to realize the reflux action.

[0019] By cooperating with the liquid supply regulating device, the valve body and the pressure detecting device, the retraction of the telescopic arm and the return of water can be carried out synchronously, which greatly saves time and is conducive to improving the working efficiency of the product.

[0020] Specifically, during the operation of the fire truck, the telescopic arm is extended and retracted, driving the telescopic tube to be extended and retracted synchronously. The change in the length of the telescopic tube will cause the volume inside the telescopic tube to change, which will in turn cause the pressure inside the connecting tube between the valve body and the telescopic tube to change. On the one hand, when the telescopic tube is shortened, the pressure inside the connecting tube between the valve body and the telescopic tube detected by the pressure detection device reaches the reflux preset pressure, the valve body opens, connecting the liquid supply regulating device and the telescopic tube, and the liquid and foam flow back to the liquid supply regulating device through the telescopic tube, realizing the water return action. On the other hand, when the telescopic tube is extended, the negative pressure inside the telescopic tube reaches the water pumping preset pressure, the valve body automatically opens, connecting the liquid supply regulating device and the telescopic tube, and the liquid and foam flow into the telescopic tube through the liquid supply regulating device, realizing the water pumping action. When the pressure in the connecting pipe between the valve body and the telescopic tube detected by the pressure detection device does not reach the preset reflux pressure, or the negative pressure in the connecting pipe does not reach the preset water pumping pressure, the valve body is closed to isolate the liquid supply regulating device and the telescopic tube. At this time, water pumping or water return action cannot be performed. The structure is simple and the control is convenient. Moreover, the telescopic arm action and water pumping action, the telescopic arm action and water return action can be performed simultaneously, which greatly saves time and is conducive to improving rescue efficiency.

[0021] In any of the above technical solutions, further, the liquid supply regulating device includes: a liquid storage tank, which is configured to contain liquid and is connected to the telescopic tube through a connecting pipe; a water level detection device, which is arranged inside the liquid storage tank and is used to detect the water level of the liquid in the liquid storage tank; and a control device is connected to the water level detection device and is used to control the on and off of the valve body according to the detection signal of the water level detection device.

[0022] In this technical solution, the liquid supply regulating device includes a liquid storage tank and a water level detection device. The liquid storage tank is used to contain liquid. The liquid storage tank is connected to the telescopic tube through a connecting pipe. It can be understood that the connecting pipe is also connected to a liquid supply device, which is used to supply water to the liquid storage tank. The water level detection device is arranged inside the liquid storage tank and is used to detect the water level of the liquid in the liquid storage tank. The control device is connected to the water level detection device and controls the opening and closing of the valve body according to the detection signal of the water level detection device, thereby connecting or disconnecting the liquid supply device from the liquid storage tank. That is, when the water level detection device detects that the water level of the liquid in the liquid storage tank has not reached the preset water level, the control device controls the valve body to operate to connect the liquid supply device and the liquid storage tank, and the liquid flows into the liquid storage tank through the liquid supply device to supply water to the liquid storage tank, thereby preparing for the telescopic tube to pump water; when the water level detection device detects that the water level of the liquid in the liquid storage tank has reached the preset water level, the control device controls the valve body to operate to separate the liquid supply device and the liquid storage tank, thereby avoiding the problem of energy waste or affecting the work efficiency of the product due to the return water action of the telescopic tube due to the large amount of reflux liquid that cannot be accommodated by the liquid storage tank. The setting of the water level detection device can effectively avoid energy waste and at the same time, can ensure the work efficiency of the product.

[0023] In any of the above technical solutions, further, the liquid supply regulating device also includes: a boosting device, which is arranged inside the liquid storage tank, and the boosting device is used to regulate the liquid pressure in the liquid storage tank.

[0024] In this technical solution, the liquid supply regulating device also includes a booster device arranged inside the liquid storage tank, which is used to adjust the liquid pressure in the liquid storage tank, thereby improving the timeliness and effectiveness of the valve body opening or closing, and ensuring the effectiveness and timeliness of the product's water pumping and water return actions. Furthermore, the setting of the booster device is conducive to the liquid in the liquid storage tank being able to be quickly and adequately injected into the telescopic tube when the telescopic tube is extended to the valve body to act and connect the liquid storage tank and the telescopic tube, thereby ensuring a good rescue effect.

[0025] In any of the above technical solutions, further, the boosting device includes: a floating plate, which is slidably and sealingly arranged inside the liquid storage tank; and an elastic member, which is arranged between the floating plate and the liquid storage tank to apply pressure to the liquid in the liquid storage tank through the floating plate.

[0026] In this technical solution, the booster device includes a floating plate and an elastic member. The floating plate is slidably and sealedly arranged inside the liquid storage tank, and the elastic member is arranged between the floating plate and the liquid storage tank. When liquid is injected into the liquid storage tank, the floating plate floats above the liquid. As the water level of the liquid in the liquid storage tank increases, the floating plate approaches the top of the liquid storage tank and compresses the elastic member between the floating plate and the liquid storage tank, thereby increasing the pressure of the liquid in the liquid storage tank. When the valve body is activated to connect the liquid storage tank and the telescopic tube, the elastic member undergoes elastic deformation to quickly and adequately inject the liquid in the liquid storage tank into the telescopic tube, thereby ensuring the timeliness and effectiveness of the telescopic tube pumping water; at the same time, the elastic potential energy stored in the elastic member cooperates with the small negative pressure generated when the telescopic tube is extended to enable the valve body to activate to connect the liquid storage tank and the telescopic tube, thereby ensuring that the water in the liquid storage tank can be injected into the telescopic tube in a timely and effective manner to complete the pumping action, thereby ensuring a good rescue effect.

[0027] Furthermore, the elastic member is arranged on the floating plate and / or the liquid storage tank. On the one hand, the elastic member is arranged on the floating plate, that is, one end of the elastic member is fixedly connected to the floating plate, and the other end is a free end; on the other hand, the elastic member is arranged on the liquid storage tank, that is, one end of the elastic member is fixedly connected to the liquid storage tank, and the other end is a free end; on another hand, one end of the elastic member is fixedly connected to the floating plate, and the other end is fixedly connected to the liquid storage tank; the different connection methods of the elastic member, the floating plate and the liquid storage tank can meet the needs of different structures of the elastic member, different structures of the floating plate, and different structures of the liquid storage tank, and have a wide range of adaptability.

[0028] In any of the above technical solutions, further, the boosting device includes: an airbag and an inflation device connected to the airbag; or an airbag.

[0029] In this technical solution, on the one hand, the pressurizing device includes an airbag, which can float on the surface of the liquid, and the airbag has good elasticity. When liquid is injected into the liquid storage tank, the airbag can float above the liquid. As the water level of the liquid in the liquid storage tank increases, the airbag contacts the top of the liquid storage tank and undergoes elastic deformation, which effectively increases the pressure of the liquid in the liquid storage tank on the valve body. Then, when the valve body moves to connect the liquid storage tank and the telescopic tube, the airbag undergoes elastic deformation to quickly and sufficiently inject the liquid in the liquid storage tank into the telescopic tube, thereby ensuring the timeliness and effectiveness of the telescopic tube pumping water. At the same time, the elastic potential energy stored in the airbag cooperates with the small negative pressure generated when the telescopic tube is extended to enable the valve body to move to connect the liquid storage tank and the telescopic tube, which is beneficial to ensure that the water in the liquid storage tank can be timely and effectively injected into the telescopic tube to complete the water pumping action, thereby ensuring a good rescue effect.

[0030] On the other hand, the boosting device includes an airbag and an inflation device connected to the airbag, so that the airbag can effectively increase the pressure of the liquid in the liquid storage tank, and the inflation device can inflate the airbag at any time, thereby ensuring the effectiveness and timeliness of the airbag in pressurizing the liquid in the liquid storage tank, thereby improving the reliability of the product.

[0031] In any of the above technical solutions, further, the connecting pipe includes: a first connecting pipe and a second connecting pipe, both of which are connected to the liquid storage tank and the telescopic tube; the valve body includes: a first valve and a second valve, the first valve is arranged on the first connecting pipe, and the second valve is arranged on the second connecting pipe; the pressure detection device is used to detect the pressure in the second connecting pipe between the second valve and the telescopic tube; the first valve is used to control the on and off of the first valve according to the pressure difference between the liquid storage tank and the telescopic tube, and the control device is used to control the action of the second valve according to the detection signal of the pressure detection device to connect or disconnect the telescopic tube and the liquid storage tank.

[0032] In this technical solution, the connecting pipe includes a first connecting pipe and a second connecting pipe, and the valve body includes a first valve and a second valve, wherein the first connecting pipe and the second connecting pipe are both connected to the liquid storage tank and the telescopic pipe, the first valve is arranged on the first connecting pipe, and the second valve is arranged on the second connecting pipe, and the pressure detection device is used to detect the pressure in the second connecting pipe between the second valve and the telescopic pipe. In the initial state, the first valve and the second valve are both closed, that is, the telescopic pipe is isolated from the liquid storage tank. When the telescopic arm is extended and drives the telescopic tube to extend, the telescopic tube is extended, the volume is increased and a vacuum is formed, that is, there is a pressure difference between the liquid storage tank and the telescopic tube. The first valve is used to control the opening and closing of the first valve according to the pressure difference between the liquid storage tank and the telescopic tube. That is, when the pressure difference between the liquid storage tank and the telescopic tube (that is, the negative pressure value in the telescopic tube) is small and not enough to open the first valve, the first valve is still closed. At this time, the liquid storage tank is separated from the telescopic tube. When the telescopic arm continues to extend, the volume of the telescopic tube continues to increase, and the pressure difference between the liquid storage tank and the telescopic tube reaches the preset water pumping pressure, the first valve is automatically opened, and the liquid in the liquid storage tank is injected into the telescopic tube through the first connecting tube, so that when the telescopic arm is extended, the telescopic tube automatically pumps water, which saves time and is conducive to improving rescue efficiency.

[0033] When the rescue is completed, the telescopic arm retracts, and the pressure difference between the liquid storage tank and the telescopic tube is small, so the first valve is closed. At this time, the liquid storage tank is separated from the telescopic tube. When the telescopic arm continues to retract, it drives the telescopic tube to retract and reduce the length and volume of the telescopic tube. The pressure in the second connecting tube between the second valve and the telescopic tube slowly increases. When the volume of the telescopic tube continues to decrease, causing the pressure in the second connecting tube between the second valve and the telescopic tube to increase to the preset reflux pressure, the control device controls the second valve to open according to the detection signal of the pressure detection device, and the residual liquid and foam in the telescopic tube flow back to the liquid storage tank through the second water pipe, thereby realizing the automatic reflux of the telescopic tube when the telescopic arm is retracted, saving time.

[0034] That is, the first connecting pipe and the first valve, the second connecting pipe and the second valve respectively realize the injection of liquid and foam from the liquid storage tank into the telescopic pipe, and the return of liquid and foam from the telescopic pipe to the liquid storage tank. This arrangement is conducive to improving the reliability of the boom liquid supply system. Specifically, for example, the first valve is an overflow valve, and the second valve is the second valve recorded in the above technical solution, that is, the second valve is the previous structure. When the pressure detection device fails or the control device fails, and the second valve cannot be controlled in time, the first valve can realize the high-pressure overflow of the liquid in the telescopic pipe, and then can realize the water return action, which plays a certain insurance role. For another example, the first valve is a hydraulically controlled one-way valve, and the second valve is the second valve recorded in the above technical solution, that is, the second valve is the previous structure. When the pressure in the liquid storage tank is greater than the pressure in the telescopic pipe, the first valve automatically opens to replenish the telescopic pipe, realizes automatic water pumping, and avoids the failure of the control device. Further, the first valve can also be a combination of an overflow valve and a hydraulically controlled one-way valve, which is conducive to further improving the reliability of the product.

[0035] Further, it can be understood that in this case, one of the first valve or the second valve can be connected to the liquid supply device, and the first connecting pipe and the second connecting pipe can be used to connect the liquid storage tank, the liquid supply device, and the telescopic pipe, so that the liquid in the liquid supply device can be stored in the liquid storage tank, the liquid in the liquid storage tank can be injected into the telescopic pipe, and the liquid remaining in the telescopic pipe can be returned to the liquid storage tank. The structure is simple and conducive to reducing costs. Further, a third connecting pipe can be set to connect the liquid storage tank and the liquid supply device, that is, the liquid and foam in the liquid supply device can be stored in the liquid storage tank through the third connecting pipe, that is, the first connecting pipe, the second connecting pipe, and the third connecting pipe can be connected to the liquid storage tank, so that the liquid in the liquid storage tank can be injected into the telescopic pipe, the liquid remaining in the telescopic pipe can be returned to the liquid storage tank, and the liquid and foam in the liquid supply device can be stored in the liquid storage tank.

[0036] In any of the above technical solutions, further, the liquid supply regulating device also includes: a pump body assembly or a water supply pipeline.

[0037] In this technical solution, the liquid supply regulating device also includes a pump body assembly or a water supply pipeline, which is directly connected to the telescopic tube through a connecting pipe to supply water to the telescopic tube. The different structures of the liquid supply regulating device can meet the needs of different structures of the boom liquid supply system and have a wide range of adaptability.

[0038] According to a second aspect of the present invention, a fire truck is provided, comprising: a vehicle body, the vehicle body being provided with a liquid supply device; and an arm liquid supply system of any of the above technical solutions, the telescopic arm being rotatably connected to the vehicle body, and the liquid supply regulating device being provided on the vehicle body.

[0039] The fire truck provided by the present invention comprises: a vehicle body and a boom liquid supply system of any of the above technical solutions, the vehicle body is provided with a liquid supply device, the telescopic arm is rotatably connected to the vehicle body, and the liquid supply regulating device is provided on the vehicle body. Since the fire truck comprises the boom liquid supply system of any of the above technical solutions, it has all the beneficial effects of the boom liquid supply system, which will not be described in detail here.

[0040] Furthermore, the fire truck is a high-altitude fire truck. The liquid supply device is connected to the liquid supply regulating device, such as the liquid supply device is connected to the liquid storage tank. Specifically, the liquid supply device can be a water tank and a water pump, or the liquid supply device can be a water pump and an external water source pipeline. It is understandable that the liquid supply device can also be a water supply waterway of the vehicle body.

[0041] Additional aspects and advantages of the present invention will become apparent from the following description or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0043] Figure 1 A schematic structural diagram of a boom liquid supply system provided according to an embodiment of the present invention is shown;

[0044] Figure 2 Shows Figure 1 A partial enlarged schematic diagram of A in the illustrated embodiment;

[0045] Figure 3 A schematic structural diagram of a liquid supply regulating device provided according to an embodiment of the present invention is shown;

[0046] Figure 4 It shows a schematic structural diagram of a partial boom liquid supply system provided according to a first embodiment of the present invention;

[0047] Figure 5 It shows a schematic structural diagram of a partial boom liquid supply system provided according to a second embodiment of the present invention;

[0048] Figure 6 A schematic structural diagram of a partial boom liquid supply system provided according to a third embodiment of the present invention is shown.

[0049] in, Figures 1 to 6 The corresponding relationship between the reference numerals and the component names is as follows:

[0050] 100 boom liquid supply system, 110 telescopic arm, 120 telescopic tube, 130 liquid supply regulating device, 132 liquid storage tank, 140 valve body, 142 first valve, 144 second valve, 150 connecting tube, 152 first connecting tube, 154 second connecting tube, 160 pressure detection device, 170 water level detection device, 180 pressurizing device, 182 floating plate, 184 elastic member. DETAILED DESCRIPTION

[0051] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0052] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0053] Refer to the following Figures 1 to 6 A boom fluid supply system 100 and a fire truck according to some embodiments of the present invention are described.

[0054] Embodiment 1:

[0055] like Figures 1 to 6 As shown, according to the first aspect of the present invention, there is provided a boom liquid supply system 100, comprising a telescopic arm 110, a telescopic tube 120 and a liquid supply regulating device 130, wherein the telescopic arm 110 comprises a plurality of relatively telescopic boom units, the telescopic tube 120 is connected to the boom units, the telescopic tube 120 is connected to a liquid supply device (not shown), and the liquid supply regulating device 130 is connected to the telescopic tube 120; wherein the liquid supply regulating device 130 is used to regulate the flow direction or on-off of the liquid between the liquid supply regulating device 130 and the telescopic tube 120 according to the telescopic length of the telescopic tube 120 or the pressure in the telescopic tube 120.

[0056] Specifically, Figure 1 , Figure 2 , Figure 4 and Figure 5As shown, the telescopic arm 110 includes a plurality of relatively telescopic arm units, and the plurality of relatively telescopic arm units are used to adjust the telescopic distance of the telescopic arm. The telescopic tube 120 is connected to the arm unit, so that the telescopic arm 110 can drive the telescopic tube 120 to synchronously extend and retract when the telescopic arm 110 is extended and retracted. The telescopic tube 120 is connected to a liquid supply device, that is, the liquid supply device supplies water and foam to the telescopic tube 120, and the liquid supply device can be an existing structure of a fire truck or other vehicles. By connecting the liquid supply regulating device 130 with the telescopic tube 120, the liquid supply regulating device 130 can adjust the liquid supply according to the telescopic length of the telescopic tube 120 or the liquid inside the telescopic tube 120 during the process of the telescopic arm 110 extending and retracting and driving the telescopic tube 120 to synchronously extend and retract. The pressure of the liquid supply regulating device 130 can regulate the flow direction or on-off of the liquid between the telescopic tube 120, thereby realizing that during the extension and retraction process of the telescopic arm 110, under the action of the liquid supply regulating device 130, the liquid and foam flow from the liquid supply regulating device into the telescopic tube 120 to realize the water pumping action, or the water in the telescopic tube 120 flows back to the liquid supply regulating device 130 under the action of the liquid supply regulating device 130 to realize the water return action, that is, the telescopic arm 110 action and the water pumping action, and the telescopic arm 110 action and the water return action are synchronously performed, compared with the related art in which the telescopic arm action and the water pumping action are performed separately, it greatly saves time, is conducive to improving rescue efficiency, and improves the market competitiveness of products.

[0057] At the same time, by adding the liquid supply regulating device 130, the movement of the telescopic arm 110 and the water pumping movement, and the movement of the telescopic arm 110 and the water returning movement can be synchronized, which has a simple structure and is easy to control, and is suitable for popularization and application.

[0058] Specifically, on the one hand, when the telescopic arm 110 is extended and drives the telescopic tube 120 to be extended, the extension length of the telescopic tube 120 increases, so that the volume of the telescopic tube 120 increases to form a vacuum, thereby generating a negative pressure in the telescopic tube 120. When the negative pressure value reaches the preset water pumping pressure, under the action of the liquid supply regulating device 130, the liquid and foam flow from the liquid supply regulating device 130 into the telescopic tube 120 to realize the water pumping action, thereby realizing the synchronous extension of the telescopic arm 110 and the water pumping action, effectively saving time and greatly improving the rescue efficiency.

[0059] On the other hand, when the telescopic arm 110 retracts and drives the telescopic tube 120 to retract synchronously, the extended length of the telescopic tube 120 decreases, and the pressure inside the telescopic tube 120 increases (pressure holding). When the pressure reaches the preset reflux pressure, under the action of the liquid supply regulating device 130, a part of the liquid or foam remaining in the telescopic tube 120 flows back to the liquid supply regulating device 130 to realize the reflux action.

[0060] Embodiment 2:

[0061] like Figures 1 to 6As shown, the arm liquid supply system 100 provided by the present invention, on the basis of Example 1, further includes: a connecting pipe 150, one end of the connecting pipe 150 is connected to the liquid supply regulating device 130, and the other end is connected to the telescopic tube 120; a valve body 140, and the valve body 140 is arranged on the connecting pipe 150; wherein, the telescopic length of the telescopic tube 120 or the pressure in the telescopic tube 120 is used to adjust the opening or on-off of the valve body 140.

[0062] In this embodiment, the boom liquid supply system 100 includes a connecting pipe 150 and a valve body 140. The connecting pipe 150 connects the liquid supply regulating device 130 and the telescopic tube 120. The valve body 140 is arranged on the connecting pipe 150. The opening or on-off of the valve body 140 is automatically adjusted by the telescopic length of the telescopic tube 120 or the pressure in the telescopic tube 120, thereby adjusting the on-off of the liquid between the telescopic tube 120 and the liquid supply regulating device 130. The structure is simple, the cost is low, and it is suitable for popularization and application.

[0063] Specifically, when multiple arm units move to extend the telescopic arm 110, and then drive the telescopic tube 120 to extend, the extension length of the telescopic tube 120 increases, so that the volume of the telescopic tube 120 increases. When the pressure in the telescopic tube 120 decreases to form a vacuum, negative pressure is generated in the telescopic tube 120. When the negative pressure value reaches the preset water pumping pressure, the valve body 140 automatically opens to connect the liquid supply regulating device 130 and the telescopic tube 120. At this time, the liquid and foam flow into the telescopic tube 120 through the liquid supply regulating device 130 to realize the water pumping action, thereby realizing the synchronous extension of the telescopic arm 110 and the water pumping action, effectively saving time and greatly improving the rescue efficiency.

[0064] Specifically, on the one hand, the opening or on-off of the valve body 140 is adjusted according to the telescopic length of the telescopic tube 120, and on the other hand, the opening or on-off of the valve body 140 is adjusted according to the pressure in the telescopic tube 120, thereby expanding the applicable scope of the product. Among them, on the one hand, the telescopic length of the telescopic tube 120 or the pressure in the telescopic tube 120 can adjust the opening of the valve body 140, and on the other hand, the telescopic length of the telescopic tube 120 or the pressure in the telescopic tube 120 can adjust the on-off of the valve body 140, which can meet the requirements of different structures of the valve body 140 and has a wide range of applications.

[0065] Embodiment 3:

[0066] like Figures 1 to 6 As shown, the arm liquid supply system 100 provided by the present invention, on the basis of the above-mentioned embodiment 2, further includes: a pressure detection device 160, connected to the connecting pipe 150 between the valve body 140 and the telescopic tube 120; a control device is connected to the pressure detection device 160 and the valve body 140, and is used to control the action of the valve body 140 according to the detection signal of the pressure detection device 160 to connect or disconnect the telescopic tube 120 and the liquid supply regulating device 130.

[0067] In this embodiment, if Figure 1 and Figure 2 As shown, the boom liquid supply system 100 also includes a pressure detection device 160 and a control device (not shown). The pressure detection device 160 is connected to the connecting pipe 150 between the valve body 140 and the telescopic tube 120, that is, the pressure detection device 160 is used to detect the pressure in the connecting pipe 150 between the valve body 140 and the telescopic tube 120. The control device is connected to the pressure detection device 160 and the valve body 140, and is used to control the action of the valve body 140 according to the detection signal of the pressure detection device 160 to connect or disconnect the telescopic tube 120 and the liquid supply regulating device 130, thereby achieving the on-off adjustment of the liquid between the telescopic tube 120 and the liquid supply regulating device 130. The structure is simple, the cost is low, and it is suitable for popularization and application.

[0068] Specifically, when the telescopic arm 110 retracts, the telescopic tube 120 retracts synchronously. At this time, the length of the telescopic tube 120 decreases, and the pressure inside the telescopic tube 120 increases (pressure buildup). When the pressure detection device 160 detects that the pressure in the connecting tube 150 between the valve body 140 and the telescopic tube 120 reaches the preset reflux pressure, the control device controls the valve body 140 to connect the telescopic tube 120 and the liquid supply regulating device 130 according to the detection signal of the pressure detection device 160, and a part of the liquid and foam remaining in the telescopic tube 120 flows back to the liquid supply regulating device 130 to realize the reflux action.

[0069] By cooperating with the liquid supply regulating device 130, the valve body 140 and the pressure detecting device 160, the retraction of the telescopic arm 110 and the return of water can be performed synchronously, which greatly saves time and is conducive to improving the work efficiency of the product.

[0070] Specifically, during the operation of the fire truck, the telescopic arm 110 is extended and retracted, driving the telescopic tube 120 to extend and retract synchronously. The change in the length of the telescopic tube 120 will cause the volume in the telescopic tube to change, which will in turn cause the pressure in the connecting tube 150 between the valve body 140 and the telescopic tube 120 to change. On the one hand, when the telescopic tube 120 is shortened, the pressure in the connecting tube 150 between the valve body 140 and the telescopic tube 120 detected by the pressure detection device 160 reaches the reflux preset pressure, the valve body 140 opens, connects the liquid supply regulating device 130 with the telescopic tube 120, and the liquid and foam flow back to the liquid supply regulating device 130 through the telescopic tube 120, realizing the water return action. On the other hand, when the telescopic tube 120 is extended, the negative pressure in the telescopic tube 120 reaches the water pumping preset pressure, the valve body 140 automatically opens to connect the liquid supply regulating device 130 with the telescopic tube 120, and the liquid and foam flow into the telescopic tube through the liquid supply regulating device 130, realizing the water pumping action. When the pressure in the connecting pipe 150 between the valve body 140 and the telescopic tube 120 detected by the pressure detection device 160 does not reach the preset reflux pressure, or the negative pressure in the telescopic tube 120 does not reach the preset water pumping pressure, the valve body 140 is closed to isolate the liquid supply regulating device 130 and the telescopic tube 120. At this time, water pumping or water return action cannot be performed. The structure is simple and the control is convenient. Moreover, the telescopic arm 110 action and water pumping action, as well as the telescopic arm 110 action and water return action can be performed simultaneously, which greatly saves time and is conducive to improving rescue efficiency.

[0071] Furthermore, a connecting hole may be provided on the telescopic tube 120 , and the connecting tube 150 is connected to the telescopic tube 120 through the connecting hole.

[0072] Embodiment 4:

[0073] like Figures 1 to 6 As shown, in one embodiment of the present invention, on the basis of the above-mentioned embodiment 3, further, the liquid supply regulating device 130 includes: a liquid storage tank 132, the liquid storage tank 132 is configured to contain liquid, and the liquid storage tank 132 is connected to the telescopic tube 120 through a connecting pipe 150; a water level detection device 170, which is arranged inside the liquid storage tank 132 and is used to detect the water level of the liquid in the liquid storage tank 132; the control device is connected to the water level detection device 170, and is used to control the on and off of the valve body 140 according to the detection signal of the water level detection device 170.

[0074] In this embodiment, if Figure 1 and Figure 2As shown, the liquid supply regulating device 130 includes a liquid storage tank 132 and a water level detection device 170. The liquid storage tank 132 is used to contain liquid. The liquid storage tank 132 is connected to the telescopic tube 120 through a connecting pipe 150. It can be understood that the connecting pipe 150 is also connected to a liquid supply device, and the liquid supply device is used to supply water to the liquid storage tank 132. The water level detection device 170 is arranged inside the liquid storage tank 132 and is used to detect the water level of the liquid in the liquid storage tank 132. The control device is connected to the water level detection device 170, and controls the opening and closing of the valve body 140 according to the detection signal of the water level detection device 170, thereby connecting or disconnecting the liquid supply device with the liquid storage tank 132. That is, when the water level detection device 170 detects that the water level of the liquid in the liquid storage tank 132 has not reached the preset water level, the control device controls the valve body 140 to operate to connect the liquid supply device and the liquid storage tank 132, and the liquid flows into the liquid storage tank 132 through the liquid supply device to supply water to the liquid storage tank 132, thereby preparing for the water pumping action of the telescopic tube 120; when the water level detection device 170 detects that the water level of the liquid in the liquid storage tank 132 has reached the preset water level, the control device controls the valve body 140 to operate to separate the liquid supply device and the liquid storage tank, thereby avoiding the problem that the liquid storage tank 132 cannot accommodate the large amount of refluxed liquid due to the water return action of the telescopic tube 120, thereby causing energy waste or affecting the working efficiency of the product. The setting of the water level detection device 170 can effectively avoid energy waste and at the same time ensure the working efficiency of the product.

[0075] Embodiment 5:

[0076] like Figures 1 to 6 As shown, in one embodiment of the present invention, based on the above-mentioned embodiment 4, it further includes: a boosting device 180, which is arranged inside the liquid storage tank 132, and the boosting device 180 is used to adjust the liquid pressure in the liquid storage tank 132.

[0077] In this embodiment, if Figure 3 As shown, the liquid supply regulating device also includes a booster device 180 disposed inside the liquid storage tank 132. The booster device 180 is used to adjust the liquid pressure in the liquid storage tank 132, thereby improving the timeliness and effectiveness of the opening or closing of the valve body 140, and ensuring the effectiveness and timeliness of the product's water pumping and water return actions. Furthermore, the arrangement of the booster device 180 is conducive to enabling the liquid in the liquid storage tank 132 to be quickly and adequately injected into the telescopic tube 120 when the telescopic tube 120 is extended to the point where the valve body 140 is activated and connects the liquid storage tank 132 and the telescopic tube 120, thereby ensuring a good rescue effect.

[0078] Furthermore, the boosting device 180 includes: a floating plate 182, which is slidably and sealingly disposed inside the liquid storage tank 132; and an elastic member 184, which is disposed between the floating plate and the liquid storage tank 132 to apply pressure to the liquid in the liquid storage tank 132 through the floating plate.

[0079] Specifically, the boosting device 180 includes a float plate 182 and an elastic member 184. The float plate 182 is slidably and sealingly arranged inside the liquid storage tank 132, and the elastic member 184 is arranged between the float plate 182 and the liquid storage tank 132. When liquid is injected into the liquid storage tank 132, the float plate 182 floats above the liquid. As the water level of the liquid in the liquid storage tank 132 increases, the float plate 182 approaches the top of the liquid storage tank 132 and compresses the elastic member 184 between the float plate 182 and the liquid storage tank 132, thereby increasing the pressure of the liquid in the liquid storage tank 132. When the valve body 140 is actuated to connect the liquid storage tank 132 and the telescopic tube 120, the elastic member 184 undergoes elastic deformation to quickly and sufficiently inject the liquid in the liquid storage tank 132 into the telescopic tube 120, thereby ensuring the timeliness and effectiveness of the telescopic tube 120 pumping water; at the same time, the elastic potential energy stored in the elastic member 184 cooperates with the small negative pressure generated when the telescopic tube 120 is extended to enable the valve body 140 to be actuated to connect the liquid storage tank 132 and the telescopic tube 120, which is beneficial to ensuring that the water in the liquid storage tank 132 can be timely and effectively injected into the telescopic tube 120 to complete the water pumping action, thereby ensuring a good rescue effect.

[0080] Furthermore, the elastic member 184 is arranged on the floating plate 182 and / or the liquid storage tank 132. On the one hand, the elastic member 184 is arranged on the floating plate 182, that is, one end of the elastic member 184 is fixedly connected to the floating plate 182, and the other end is a free end; on the other hand, the elastic member 184 is arranged on the liquid storage tank 132, that is, one end of the elastic member 184 is fixedly connected to the liquid storage tank 132, and the other end is a free end; on the other hand, one end of the elastic member 184 is fixedly connected to the floating plate 182, and the other end is fixedly connected to the liquid storage tank 132; the different connection methods of the elastic member 184 and the floating plate 182 and the liquid storage tank 132 can meet the requirements of different structures of the elastic member 184, different structures of the floating plate 182, and different structures of the liquid storage tank 132, and have a wide range of adaptability.

[0081] Further, the boosting device 180 includes an airbag and an inflation device connected to the airbag; or the airbag.

[0082] Specifically, the pressurizing device includes an airbag, which can float on the surface of the liquid and has good elasticity. When liquid is injected into the liquid storage tank 132, the airbag can float above the liquid. As the water level of the liquid in the liquid storage tank 132 increases, the airbag contacts the top of the liquid storage tank 132 and undergoes elastic deformation, which effectively increases the pressure of the liquid in the liquid storage tank 132 acting on the valve body 140. Then, when the valve body 140 moves to connect the liquid storage tank 132 and the telescopic tube 120, the airbag undergoes elastic deformation to quickly and sufficiently inject the liquid in the liquid storage tank 132 into the telescopic tube 120, thereby ensuring the timeliness and effectiveness of the telescopic tube 120 pumping water. At the same time, the elastic potential energy stored in the airbag cooperates with the small negative pressure generated when the telescopic tube 120 is extended to enable the valve body 140 to move to connect the liquid storage tank 132 and the telescopic tube 120, which is conducive to ensuring that the water in the liquid storage tank 132 can be timely and effectively injected into the telescopic tube 120 to complete the water pumping action, thereby ensuring a good rescue effect.

[0083] On the other hand, the boosting device 180 includes an airbag and an inflation device connected to the airbag, so that the airbag can effectively increase the pressure of the liquid in the liquid storage tank 132, and the inflation device can inflate the airbag at any time, thereby ensuring the effectiveness and timeliness of the airbag in pressurizing the liquid in the liquid storage tank 132, thereby improving the reliability of the product.

[0084] Embodiment 6:

[0085] like Figures 1 to 6 As shown, in one embodiment of the present invention, on the basis of the above-mentioned embodiment 4 or embodiment 5, further, the connecting pipe 150 includes: a first connecting pipe 152 and a second connecting pipe 154, the first connecting pipe 152 and the second connecting pipe 154 are both connected to the liquid storage tank 132 and the telescopic tube 120; the valve body 140 includes: a first valve 142 and a second valve 144, the first valve 142 is arranged on the first connecting pipe 152, and the second valve 144 is arranged on the second connecting pipe 154; the pressure detection device 160 is used to detect the pressure in the second connecting pipe 154 between the second valve 144 and the telescopic tube 120; the first valve 142 is used to control the opening and closing of the first valve 142 according to the pressure difference between the liquid storage tank 132 and the telescopic tube 120, and the control device is used to control the action of the second valve 144 according to the detection signal of the pressure detection device 160 to connect or disconnect the telescopic tube 120 and the liquid storage tank 132.

[0086] In this embodiment, if Figure 6As shown, the connecting pipe 150 includes a first connecting pipe 152 and a second connecting pipe 154, and the valve body 140 includes a first valve 142 and a second valve 144, wherein the first connecting pipe 152 and the second connecting pipe 154 are both connected to the liquid storage tank 132 and the telescopic tube 120, the first valve 142 is arranged on the first connecting pipe 152, and the second valve 144 is arranged on the second connecting pipe 154, and the pressure detection device 160 is used to detect the pressure in the second connecting pipe 154 between the second valve 144 and the telescopic tube 120. In the initial state, the first valve 142 and the second valve 144 are both closed, that is, the telescopic tube 120 is isolated from the liquid storage tank 132. When the telescopic arm 110 is extended and drives the telescopic tube 120 to extend, the telescopic tube 120 is extended, the volume increases and a vacuum is formed, that is, there is a pressure difference between the liquid storage tank 132 and the telescopic tube 120. The first valve 142 is used to control the opening and closing of the first valve 142 according to the pressure difference between the liquid storage tank 132 and the telescopic tube 120. That is, when the pressure difference between the liquid storage tank 132 and the telescopic tube 120 (that is, the negative pressure value in the telescopic tube 120) is small and insufficient to open the first valve 142, the first valve 142 is still closed. At this time, the liquid storage tank 132 is isolated from the telescopic tube 120. When the telescopic arm 110 continues to extend, the volume of the telescopic tube 120 continues to increase, and the pressure difference between the liquid storage tank 132 and the telescopic tube 120 reaches the preset water pumping pressure, the first valve 142 is automatically opened, and the liquid in the liquid storage tank 132 is injected into the telescopic tube 120 through the first connecting pipe 152, so that the telescopic tube 120 automatically pumps water when the telescopic arm 110 is extended, which saves time and is conducive to improving rescue efficiency.

[0087] When the rescue is completed, the telescopic arm 110 retracts, and the pressure difference in the first connecting pipe 152 between the liquid storage tank 132 and the telescopic tube 120 is small, and the first valve 142 is closed. At this time, the liquid storage tank 132 is isolated from the telescopic tube 120. When the telescopic arm 110 continues to retract, and drives the telescopic tube 120 to retract to reduce the length and volume of the telescopic tube 120, the pressure in the second connecting pipe 154 between the second valve 144 and the telescopic tube 120 slowly increases. When the volume of the telescopic tube 120 continues to decrease, causing the pressure in the second connecting pipe 154 between the second valve 144 and the telescopic tube 120 to increase to the reflux preset pressure, the control device controls the second valve 144 to open according to the detection signal of the pressure detection device, and the residual liquid and foam in the telescopic tube 120 flow back to the liquid storage tank 132 through the second water pipe, thereby realizing the automatic reflux of the telescopic tube 120 when the telescopic arm 110 is retracted, saving time.

[0088] That is, the first connecting pipe 152 and the first valve 142, the second connecting pipe 154 and the second valve 144 respectively realize the injection of liquid and foam from the liquid storage tank 132 into the telescopic tube 120, and the return of liquid from the telescopic tube 120 to the liquid storage tank 132. This is conducive to improving the reliability of the boom liquid supply system 100. Specifically, for example, the first valve 142 is an overflow valve, and the second valve 144 is the second valve 144 described in the above technical solution, that is, the second valve 144 is the previous structure. When the pressure detection device 160 fails or the control device fails, and the second valve 144 cannot be controlled in time, the first valve 142 can realize the high-pressure overflow of the liquid in the telescopic tube 120, and then can realize the water return action, which plays a certain insurance role. For another example, the first valve 142 is a hydraulically controlled one-way valve, and the second valve 144 is the second valve 144 described in the above technical solution, that is, the second valve 144 is the previous structure. When the pressure in the liquid storage tank 132 is greater than the pressure in the telescopic tube 120, the first valve 142 automatically opens to replenish the telescopic tube 120, thereby achieving automatic water pumping and avoiding failure of the control device. Furthermore, the first valve 142 can also be a combination of a relief valve and a hydraulically controlled one-way valve, which is conducive to further improving the reliability of the product.

[0089] Further, it can be understood that in this case, one of the first valve 142 or the second valve 144 can be connected to the liquid supply device, and the first connecting pipe 152 and the second connecting pipe 154 can be used to connect the liquid storage tank 132, the liquid supply device, and the telescopic tube 120. This can achieve the purpose of storing the liquid in the liquid supply device in the liquid storage tank 132, injecting the liquid in the liquid storage tank 132 into the telescopic tube 120, and returning the residual liquid in the telescopic tube 120 to the liquid storage tank 132. The structure is simple, which is conducive to reducing costs. Furthermore, a third connecting pipe may be provided to connect the liquid storage tank 132 and the liquid supply device, that is, the liquid and foam in the liquid supply device are stored in the liquid storage tank 132 through the third connecting pipe, that is, the first connecting pipe 152, the second connecting pipe 154, and the third connecting pipe are connected to the liquid storage tank 132 through three pipelines, so as to inject the liquid in the liquid storage tank 132 into the telescopic tube 120, return the residual liquid in the telescopic tube 120 to the liquid storage tank 132, and store the liquid and foam in the liquid supply device in the liquid storage tank 132.

[0090] Embodiment 7:

[0091] like Figures 1 to 6 As shown, in one embodiment of the present invention, based on any one of the above embodiments 1 to 6, the liquid supply regulating device 130 further includes: a pump body assembly or a water supply pipeline.

[0092] In this embodiment, the liquid supply regulating device 130 also includes a pump body assembly or a water supply pipeline, which is directly connected to the telescopic tube 120 through the connecting pipe 150 to supply water to the telescopic tube 120. The different structures of the liquid supply regulating device 130 can meet the requirements of different structures of the boom liquid supply system 100 and have a wide range of adaptability.

[0093] Embodiment 8:

[0094] like Figures 1 to 6 As shown, according to a second aspect of the present invention, a fire truck is provided, comprising: a vehicle body, the vehicle body is provided with a liquid supply device; and the arm liquid supply system 100 of any of the above embodiments, the telescopic arm 110 is rotatably connected to the vehicle body, and the liquid supply regulating device 130 is provided on the vehicle body. Since the fire truck includes the arm liquid supply system 100 of any of the above embodiments, it has all the beneficial effects of the arm liquid supply system 100, which will not be described in detail here.

[0095] Furthermore, the fire truck is a high-altitude fire truck. The liquid supply device is connected to the liquid supply regulating device 130, such as the liquid supply device is connected to the liquid storage tank 132. Specifically, the liquid supply device can be a water tank and a water pump, or the liquid supply device can also be a water pump and an external water source pipeline. It is understandable that the liquid supply device can also be a water supply waterway of the vehicle body. Specific embodiment:

[0097] like Figures 1 to 5 As shown, the arm support liquid supply system 100 provided in the present application is used for a fire truck, and includes a telescopic arm 110, a telescopic tube 120, a valve body 140, a connecting pipe 150, a pressure detection device 160, a control device, a liquid storage tank 132 and a water level sensor (water level detection device 170), as shown in FIG. Figure 4 and Figure 5 As shown, the telescopic tube 120 is arranged on the telescopic arm 110, and the telescopic action of the telescopic arm 110 can drive the telescopic tube 120 to extend and retract synchronously. The connecting tube 150 connects the liquid storage tank 132 and the telescopic tube 120. The valve body 140 is arranged on the connecting tube 150. The pressure detection device 160 is used to detect the pressure in the connecting tube 150 between the valve body 140 and the telescopic tube 120. The water level sensor is arranged inside the liquid storage tank 132 to detect the water level of the liquid in the liquid storage tank 132.

[0098] Specifically, Figure 1 and Figure 2As shown, a connection hole is provided on the telescopic tube 120, one end of the connection tube 150 is connected to the telescopic tube 120 through the connection hole, and the other end is connected to the liquid storage tank 132, and a valve body 140 is provided on the connection tube 150. In the initial state, when the telescopic arm 110 has not yet been extended, the water level sensor detects that the water level in the liquid storage tank 132 has not reached the target water level, and the control device controls the valve body 140 to open, and water is transported to the liquid storage tank 132 through the disembarkation waterway (water storage part) on the body of the fire truck. When the water level sensor senses that the water level has reached the target water level, the valve body 140 is closed. When the telescopic arm 110 is extended, the telescopic tube 120 is extended synchronously, and the volume of the telescopic tube 120 increases to form a vacuum, thereby generating a negative pressure to control the valve body 140 to open, and a part of the water in the liquid storage tank 132 is added to the telescopic tube 120, so that the telescopic tube 120 pumps water. When the telescopic arm 110 is retracted, the telescopic tube 120 is retracted synchronously, and the volume of the telescopic tube 120 is reduced, so that the pressure in the telescopic tube 120 increases (pressure is held back). When the pipeline pressure between the valve body 140 and the telescopic tube 120 reaches a certain value, the control device controls the valve body 140 to open according to the detection signal of the pressure sensor, so that part of the water in the telescopic tube 120 is input into the liquid storage tank 132, wherein the purpose of the target water level is to ensure that the liquid storage tank 132 will not be full when the telescopic arm 110 is fully retracted. Therefore, by connecting an external liquid storage tank 132 to the telescopic arm 110 and the telescopic tube 120 for linkage and synchronous action, the pressure in the telescopic tube 120 can be effectively controlled in real time, so that the telescopic arm 110 can be extended and pumped water, and the telescopic arm 110 can be retracted and returned water can be carried out simultaneously, which greatly saves time and improves rescue efficiency. The structure is simple and the control is convenient, which is suitable for popularization and application.

[0099] Furthermore, if Figure 5 As shown, a booster device 180 may be provided in the liquid storage tank 132, and the booster device 180 may be a spring floating plate structure or an air bag. Taking the booster device 180 as a spring floating plate structure as an example, when liquid is injected into the liquid storage tank 132, the floating plate 182 floats above the liquid. As the liquid water level in the liquid storage tank 132 increases, the floating plate 182 approaches the top of the liquid storage tank 132 and compresses the spring (elastic member 184) between the floating plate 182 and the top of the liquid storage tank 132, effectively increasing the pressure of the liquid in the liquid storage tank 132 acting on the valve body 140. Furthermore, the negative pressure generated when the telescopic tube 120 is extended is not enough to open the valve body 140. When water is injected into the liquid storage tank 132, the spring is compressed and stores elastic potential energy. Therefore, the elastic potential energy of the spring cooperates with the negative pressure of the telescopic tube 120 to open the valve body 140 in time. After the valve body 140 is opened, the spring expands to generate elastic force, and the pressure of the liquid on the valve body 140 increases, so that the liquid in the liquid storage tank 132 can be quickly and sufficiently injected into the telescopic tube 120, thereby ensuring the timeliness and effectiveness of the water pumping by the telescopic tube 120.

[0100] Furthermore, the liquid storage tank 132 may also be replaced by other structures such as an external pump body assembly water replenishment pump or a water supply pipeline water replenishment pipeline, which can also achieve the above-mentioned technical effects of the present application.

[0101] Furthermore, a connecting pipe 150 may be provided between the liquid storage tank 132 and the telescopic tube 120 to simultaneously realize the flow of liquid from the liquid storage tank 132 to the telescopic tube 120 and the return of liquid from the telescopic tube 120 to the liquid storage tank 132, and the liquid inlet pipe supplying water to the liquid storage tank 132 may also be connected to the liquid storage tank 132 through the connecting pipe 150; or, two connecting pipes 150 may be provided between the liquid storage tank 132 and the telescopic tube 120 to respectively realize the flow of liquid from the liquid storage tank 132 to the telescopic tube 120 and the return of liquid from the telescopic tube 120 to the liquid storage tank 132, and the liquid inlet pipe supplying water to the liquid storage tank 132 may be connected to the liquid storage tank 132 through any connecting pipe 150, or a connecting pipe 150 is provided separately to connect the liquid storage tank 132 and the water inlet pipe. That is, the liquid storage tank 132 may achieve the above technical effects of the present application through one connecting pipe 150, two connecting pipes 150, or three connecting pipes 150, and has a wide range of applications.

[0102] The arm liquid supply system 100 provided in the present application has the function of synchronous extension and retraction of the telescopic arm 110 and the telescopic tube 120. By setting a liquid storage tank 132, the liquid storage tank 132 and the telescopic arm 110 and the telescopic tube 120 are linked and synchronously moved, so that the pressure in the telescopic tube 120 can be effectively controlled in real time, and finally the telescopic arm 110 and the water pumping action, the telescopic arm 110 and the reflux action are carried out simultaneously, which greatly saves time, improves the rescue efficiency of the fire truck, and is suitable for popularization and application.

[0103] In the description of the present invention, the term "plurality" refers to two or more than two. Unless otherwise clearly defined, the orientation or positional relationship indicated by the terms "upper" and "lower" is based on the orientation or positional relationship described in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention. The terms "connection", "installation", "fixation", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0104] In the description of the present invention, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In the present invention, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0105] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A boom liquid supply system, characterized in that: include: A telescopic arm (110), comprising a plurality of relatively telescopic arm units; A telescopic tube (120) connected to the plurality of arm units, the telescopic tube (120) being in communication with a liquid supply device; a liquid supply regulating device (130), the liquid supply regulating device (130) being in communication with the telescopic tube (120); The liquid supply regulating device (130) is used to regulate the flow direction or on / off of the liquid between the liquid supply regulating device (130) and the telescopic tube (120) according to the telescopic length of the telescopic tube (120) or the pressure in the telescopic tube (120); The arm support fluid supply system also includes: A connecting pipe (150), one end of the connecting pipe (150) being connected to the liquid supply regulating device (130), and the other end of the connecting pipe (150) being connected to the telescopic pipe (120); a valve body (140), the valve body (140) being arranged on the connecting pipe (150); Wherein, the telescopic length of the telescopic tube (120) or the pressure in the telescopic tube (120) is used to adjust the opening or on / off of the valve body (140); The arm support fluid supply system also includes: a pressure detection device (160), the pressure detection device (160) being connected to the connecting pipe (150) between the valve body (140) and the telescopic pipe (120); a control device, the control device being connected to the pressure detection device (160) and the valve body (140), and being used to control the movement of the valve body (140) to connect or disconnect the telescopic tube (120) and the liquid supply regulating device (130) according to a detection signal of the pressure detection device (160); When the telescopic tube (120) is shortened and the pressure in the connecting tube (150) between the valve body (140) and the telescopic tube (120) detected by the pressure detection device (160) reaches a preset reflux pressure, the valve body (140) is opened to connect the liquid supply regulating device (130) and the telescopic tube (120), and the liquid and foam flow back to the liquid supply regulating device (130) through the telescopic tube (120), thereby realizing a water return action; When the telescopic tube (120) is extended and the negative pressure in the telescopic tube (120) reaches a preset water pumping pressure, the valve body (140) automatically opens to connect the liquid supply regulating device (130) and the telescopic tube (120), so that liquid and foam flow through the liquid supply regulating device (130) to the telescopic tube (120), thereby achieving a water pumping action; When the pressure in the connecting pipe (150) between the valve body (140) and the telescopic tube (120) detected by the pressure detection device (160) does not reach the preset reflux pressure, or the negative pressure in the telescopic tube (120) does not reach the preset water pumping pressure, the valve body (140) is closed, thereby isolating the liquid supply regulating device (130) and the telescopic tube (120).

2. The boom liquid supply system according to claim 1, characterized in that: The liquid supply regulating device (130) comprises: A liquid storage tank (132), the liquid storage tank (132) being configured to contain liquid, the liquid storage tank (132) being connected to the telescopic tube (120) via the connecting tube (150); A water level detection device (170), disposed inside the liquid storage tank (132), and used to detect the water level of the liquid in the liquid storage tank (132); The control device is connected to the water level detection device (170), and is used to control the on and off of the valve body (140) according to a detection signal from the water level detection device (170).

3. The boom liquid supply system according to claim 2, characterized in that: The liquid supply regulating device (130) further comprises: The pressure boosting device (180) is arranged inside the liquid storage tank (132), and the pressure boosting device (180) is used to adjust the liquid pressure in the liquid storage tank (132).

4. The boom liquid supply system according to claim 3, characterized in that: The boosting device (180) comprises: A floating plate (182) is slidably and sealingly disposed inside the liquid storage tank (132); An elastic member (184) is disposed between the floating plate (182) and the liquid storage tank (132) so as to apply pressure to the liquid in the liquid storage tank (132) through the floating plate (182).

5. The boom liquid supply system according to claim 3, characterized in that: The boosting device (180) comprises: An airbag and an inflation device connected to the airbag.

6. The boom liquid supply system according to any one of claims 2 to 5, characterized in that: The connecting pipe (150) comprises: a first connecting pipe (152) and a second connecting pipe (154); the first connecting pipe (152) and the second connecting pipe (154) are both connected to the liquid storage tank (132) and the telescopic pipe (120); The valve body (140) comprises: a first valve (142) and a second valve (144), the first valve (142) being arranged on the first connecting pipe (152), and the second valve (144) being arranged on the second connecting pipe (154); The pressure detection device (160) is used to detect the pressure in the second connecting pipe (154) between the second valve (144) and the telescopic pipe (120); The first valve (142) is used to control the on / off state of the first valve (142) according to the pressure difference between the liquid storage tank (132) and the telescopic tube (120); The control device is used to control the action of the second valve (144) to connect or disconnect the telescopic tube (120) and the liquid storage tank (132) according to the detection signal of the pressure detection device (160).

7. The boom liquid supply system according to any one of claims 1 to 5, characterized in that: The liquid supply regulating device (130) further comprises: Pump assembly or water supply line.

8. A fire truck, characterized in that: include: A vehicle body, wherein the vehicle body is provided with a liquid supply device; as well as The boom liquid supply system according to any one of claims 1 to 7, wherein the telescopic arm (110) is rotatably connected to the vehicle body, and the liquid supply regulating device (130) is arranged on the vehicle body.

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