A high-pressure water system and road maintenance vehicle

Abstract

This utility model discloses a high-pressure water system and a road maintenance vehicle, relating to the field of cleaning equipment. The high-pressure water system includes a water pump, a boiler, a control valve, and a pressure sensor. The output end of the water pump is fluidly connected to the input end of the boiler, and the output end of the boiler is used to connect a water-using device. The control valve is installed on the pipeline between the water pump and the boiler to control the connection or disconnection between the output end of the water pump and the input end of the boiler. The pressure sensor is installed at the output end of the water pump to detect the pressure value at the pump output end. The boiler is connected to a power source via a circuit breaker and is configured to start when the circuit breaker is closed, the control valve is open, and the pressure value at the output end of the water pump is greater than or equal to a first preset pressure. The high-pressure water system provided by this utility model has higher safety.

Description

Technical Field

[0001] This utility model relates to the field of cleaning equipment, and more specifically, to a high-pressure water system and a road maintenance vehicle. Background Technology

[0002] Some road maintenance vehicles on the market are equipped with high-pressure water systems, which contain boilers to heat the high-pressure water. The heated high-pressure water is then transported to water-using devices such as spray guns.

[0003] The boilers of these road maintenance vehicles are started and stopped manually by the operators, which often results in dry burning, posing a high risk. Utility Model Content

[0004] The purpose of this invention is to provide a high-pressure water circuit system that can prevent boilers from dry burning and has higher safety.

[0005] Another objective of this utility model is to provide a road maintenance vehicle with enhanced safety features.

[0006] The embodiments of this utility model provide a technical solution: A high-pressure water circuit system includes a water pump, a boiler, a control valve, a pressure sensor, a control module, and a detection device. The output end of the water pump is fluidly connected to the input end of the boiler, and the output end of the boiler is used to connect to a water-using device. The control valve is installed on the pipeline between the water pump and the boiler to control the connection or disconnection between the output end of the water pump and the input end of the boiler; the pressure sensor is installed at the output end of the water pump to detect the pressure value at the output end of the water pump. The boiler is connected to a power source via a circuit breaker. The detection device is used to detect the on / off state of the control valve. The control module is electrically connected to the detection device, the pressure sensor, the circuit breaker, and the boiler. It is used to control the boiler to start when the circuit breaker is in the closed state, the detection device detects that the control valve is in the open state, and the pressure value is greater than or equal to a first preset pressure.

[0007] In an optional embodiment, the detection element is a proximity switch, and the control valve is provided with a switching handle for switching its operating state. When the control valve is in the on state, the switching handle is in the sensing area of ​​the proximity switch, triggering the proximity switch to send an on signal to the control module.

[0008] In an optional embodiment, the control valve is a three-way valve with a first port, a second port and a drain port. The first port is fluidly connected to the output end of the water pump, and the second port is fluidly connected to the input end of the boiler. When the control valve is in the on state, the first interface is connected to the second interface, and the drain interface is disconnected from both the first interface and the second interface; when the control valve is in the off state, the first interface is disconnected from both the second interface and the drain interface, and the second interface is connected to the drain interface.

[0009] In an optional embodiment, a first unloading valve is further included, which is disposed on the pipeline between the pressure sensor and the control valve, and is fluidly connected to the water tank.

[0010] In an optional embodiment, a branch pipeline is also included, one end of which is connected to the pipeline between the first unloading valve and the control valve, and the other end is used to connect to a water-using device. A second unloading valve is provided on the branch pipeline, and the second unloading valve is fluidly connected to the water tank.

[0011] In an optional embodiment, a high-pressure ball valve is also provided on the branch pipeline, and the high-pressure ball valve is located upstream of the second unloading valve.

[0012] This utility model also provides a road maintenance vehicle, including the aforementioned high-pressure water system. The high-pressure water system includes a water pump, a boiler, a control valve, and a pressure sensor. The output end of the water pump is fluidly connected to the input end of the boiler, and the output end of the boiler is used to connect a water-using device. The control valve is installed on the pipeline between the water pump and the boiler to control the connection or disconnection between the output end of the water pump and the input end of the boiler; the pressure sensor is installed at the output end of the water pump to detect the pressure value at the output end of the water pump. The boiler is connected to a power source via a circuit breaker, and the boiler is configured to start when the circuit breaker is closed, the control valve is open, and the pressure value is greater than or equal to a first preset pressure.

[0013] Compared to existing technologies, the high-pressure water circuit system provided by this utility model configures the boiler to start when the circuit breaker is closed, the control valve is open, and the pressure value is greater than or equal to a first preset pressure. This ensures that the boiler is powered normally, the water-using devices connected to the boiler output terminal are using water normally, the water pump is working normally, and the water output from the water pump terminal can flow into the boiler, preventing dry burning or overheating. Therefore, the beneficial effects of the high-pressure water circuit system provided by this utility model include: higher safety. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this utility model and therefore should not be considered as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without any creative effort.

[0015] Figure 1 A schematic diagram of the high-pressure water circuit system provided for an embodiment of this utility model; Figure 2 A structural block diagram of a high-pressure water circuit system provided for an embodiment of this utility model; Figure 3 This is a schematic diagram of the connection structure between the control valve and the detection element; Figure 4 A flowchart illustrating a boiler control method provided in an embodiment of this utility model.

[0016] Icons: 100-High-pressure water system; 110-Water pump; 120-Boiler; 130-Control valve; 131-First interface; 132-Second interface; 133-Drain interface; 134-Switching handle; 140-Pressure sensor; 150-Circuit breaker; 160-Power supply; 170-Control module; 180-Detection element; 191-First unloading valve; 192-Branch pipeline; 193-Second unloading valve; 194-High-pressure ball valve; 195-Water tank; 196-Motor; 200-Wind reel; 300-Water-using device. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0018] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0019] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0020] In the description of this utility model, it should be understood that the terms "upper", "lower", "inner", "outer", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use, or the orientation or positional relationship that is commonly understood by those skilled in the art. They are only used to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0022] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, terms such as "set" and "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0023] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0024] Example Please refer to the following: Figure 1 and Figure 2 , Figure 1 The diagram shown is a structural schematic of the high-pressure water system 100 provided in this embodiment. Figure 2 The diagram shown is a structural block diagram of the high-pressure water system 100.

[0025] The high-pressure water system 100 provided in this embodiment is applied to a road maintenance vehicle and specifically includes a water tank 195, a water pump 110, a boiler 120, a control valve 130, and a pressure sensor 140. The water pump 110 is driven by a motor 196, and its input end is fluidly connected to the water tank 195 via a pipeline. The output end of the water pump 110 is fluidly connected to the input end of the boiler 120 via a pipeline. The output end of the boiler 120 is connected to a water-using device 300 via a reel 200. The water-using device 300 can be a spray gun or similar equipment. The control valve 130 is located on the pipeline between the water pump 110 and the boiler 120 to control the connection or disconnection between the output end of the water pump 110 and the input end of the boiler 120. The pressure sensor 140 is located at the output end of the water pump 110 to detect the pressure value at the output end of the water pump 110.

[0026] Boiler 120 is used to heat the water input into it. The heated water flows from the output end of boiler 120 into reel 200, and then into water supply device 300 connected to reel 200. Boiler 120 is connected to power supply 160 via circuit breaker 150. Power supply 160 can be the battery of the road maintenance vehicle chassis.

[0027] In this embodiment, the boiler 120 is configured to start when the circuit breaker 150 is closed, the control valve 130 is open, and the pressure value at the output of the water pump 110 is greater than or equal to a first preset pressure.

[0028] In other words, there are three conditions for the boiler 120 to start heating in this embodiment. First, the pressure value detected by the pressure sensor 140 is greater than or equal to the first preset pressure, indicating that there is effective pressure in the pipeline, the water pump 110 is running normally, and the water-using device 300 connected to the output end of the boiler 120 is using water normally. Second, the control valve 130 connects the output end of the water pump 110 to the input end of the boiler 120, indicating that the high-pressure water output by the water pump 110 can smoothly enter the boiler 120. Third, the circuit breaker 150 is in the closed state, indicating that the circuit where the boiler 120 is located is normal and the boiler 120 is in a working state.

[0029] By limiting the operation to three conditions, the boiler 120 is ensured to start only when the pipeline is in operation, there is water in the boiler 120, and the boiler 120 is functioning normally. This prevents the boiler 120 from starting when there is no water inside, which would cause dry burning, and from starting when the water-using device 300 is not in operation, which would cause overheating. Furthermore, in the event of an abnormality in the circuit, the circuit breaker 150 automatically trips, i.e., it is in the open state, and can also be manually disconnected to prevent the fault current from affecting the normal operation of other components of the vehicle. Therefore, the high-pressure water system 100 provided in this embodiment has higher safety.

[0030] The pressure sensor 140 can also be replaced by a flow sensor, but the pressure sensor 140 can withstand greater water pressure and has a longer service life than a flow sensor installed in the pipeline.

[0031] In fact, the high-pressure water circuit system 100 provided in this embodiment also includes a control module 170 and a detection element 180. The detection element 180 is used to detect the on / off state of the control valve 130. The control module 170 is electrically connected to the detection element 180, the pressure sensor 140, the circuit breaker 150 and the boiler 120 respectively. It is used to control the boiler 120 to start when the circuit breaker 150 is in the closed state, the detection element 180 detects that the control valve 130 is in the open state and the pressure value is greater than or equal to the first preset pressure.

[0032] The high-pressure water system 100 provided in this embodiment also includes a first unloading valve 191, which is disposed on the pipeline between the pressure sensor 140 and the control valve 130, and is fluidly connected to the water tank 195.

[0033] The first unloading valve 191 plays a role in maintaining stable pipeline pressure. When the pressure in the pipeline exceeds the set value, the return water channel is automatically opened to guide the excess high-pressure water output by the water pump 110 back to the water tank 195 to prevent the pipeline pressure from being too high.

[0034] It should be noted that the working pressure of the high-pressure water system 100 can reach over 30 MPa. In other words, when the water pump 110 is running, the pressure value detected by the pressure sensor 140 can reach over 30 MPa. When the water-using device 300 connected to the output end of the boiler 120 is not working, the first unloading valve 191 is in a fully unloaded state, and at this time the pressure value detected by the pressure sensor 140 is less than the first preset pressure.

[0035] At this time, although there is water in boiler 120, boiler 120 still cannot be started. When the water-using device 300 connected to the output end of boiler 120 is working, the automatic unloading valve is in a pressure-stabilizing state, and the pressure value detected by pressure sensor 140 is greater than or equal to the first preset pressure, thus satisfying one of the conditions for starting boiler 120. It should be noted that the first preset pressure needs to be much lower than the working pressure of high-pressure water system 100, but greater than the pressure in the pipeline when the first unloading valve 191 is fully unloaded. Preferably, the first preset pressure in this embodiment is 2 MPa.

[0036] The high-pressure water system 100 provided in this embodiment also includes a branch pipe 192. One end of the branch pipe 192 is connected to the pipe between the first unloading valve 191 and the control valve 130, and the other end is used to connect to the water-using device 300. A second unloading valve 193 is provided on the branch pipe 192, and the second unloading valve 193 is fluidly connected to the water tank 195.

[0037] It is understandable that the water-using device 300 connected to branch pipe 192 can be different from the water-using device 300 connected to the output end of boiler 120. When control valve 130 is in the open state, that is, when the output end of water pump 110 is fluidly connected to the input end of boiler 120, the high-pressure water output by water pump 110 passes through the first unloading valve 191, and part of it flows through control valve 130 into boiler 120. After being heated by boiler 120, it flows into reel 200 and finally into water-using device 300 connected to the end of reel 200. The other part flows into branch pipe 192, passes through the second unloading valve 193, and then flows into water-using device 300 connected to the end of branch pipe 192.

[0038] In fact, the second unloading valve 193 serves as a secondary pressure relief mechanism. The high-pressure water output by the water pump 110 is stabilized by the first unloading valve 191 and then depressurized at the second unloading valve 193, allowing it to be input to the water-using device 300 connected to the end of the branch pipe 192 at a lower pressure. Preferably, in this embodiment, the second unloading valve 193 ensures that the pressure in the branch pipe 192 does not exceed 14 MPa, preventing damage to the components on the branch pipe 192 and the connected water-using device 300 under high pressure.

[0039] In addition, in this embodiment, a high-pressure ball valve 194 is also provided on the branch pipeline 192, and the high-pressure ball valve 194 is located upstream of the second unloading valve 193. When the second unloading valve 193 fails, the high-pressure ball valve 194 can be manually closed, thereby ensuring the normal operation of other branches of the high-pressure water system 100.

[0040] When the water supply device 300 connected to the output of boiler 120 stops working, if the high-pressure ball valve 194 is opened, allowing all the high-pressure water output by pump 110 to flow into branch pipe 192, the first unloading valve 191 will be in a pressure-stabilizing state. The pressure value detected by pressure sensor 140 may be greater than or equal to the first preset pressure. In this case, circuit breaker 150 needs to be switched to the open state to avoid energy waste caused by continuous operation of boiler 120. It should be noted that switching circuit breaker 150 to the open state can be done manually or automatically through the configuration execution module.

[0041] For example, in another embodiment of the high-pressure water system 100, an execution module and a detection module are configured, which are electrically connected to the control module 170. The detection module is used to detect the water flow status at the output end of the boiler 120, and the execution module is used to drive the circuit breaker 150 to switch states. In practical applications, when the detection module detects that no water flows out of the output end of the boiler 120, and the pressure value detected by the pressure sensor 140 is greater than or equal to the first preset pressure, it indicates that the water-using device 300 connected to the output end of the boiler 120 has stopped working, and all the high-pressure water output by the water pump 110 flows into the branch pipe 192. In this case, the control module 170 controls the execution module to switch the circuit breaker 150 to the open state, thereby completing the power outage of the boiler 120.

[0042] Please refer to the following: Figure 3 , Figure 3 The diagram shows the connection structure between the control valve 130 and the detection element 180.

[0043] In this embodiment, the detection element 180 is a proximity switch, and the control valve 130 is provided with a switching handle 134 for switching its working state. When the control valve 130 is in the conducting state, the switching handle 134 is in the sensing area of ​​the proximity switch, triggering the proximity switch to send a conduction signal to the control module 170.

[0044] In another embodiment, the detection element 180 can also be selected from other types according to the actual application conditions, such as pressure sensor 140, etc.

[0045] In this embodiment, the control valve 130 is a three-way valve with a first port 131, a second port 132 and a drain port 133. The first port 131 is fluidly connected to the output end of the water pump 110, and the second port 132 is fluidly connected to the input end of the boiler 120.

[0046] In the on state, the first interface 131 is connected to the second interface 132, and the drain interface 133 is disconnected from both the first interface 131 and the second interface 132. In the off state, the first interface 131 is disconnected from both the second interface 132 and the drain interface 133, and the second interface 132 is connected to the drain interface 133.

[0047] Understandably, in the disconnected state, the second interface 132 is connected to the drain interface 133, and water in the boiler 120 can be discharged through the drain interface 133. In practical applications, the drain interface 133 can be fluidly connected to the water tank 195.

[0048] In summary, the high-pressure water circuit system 100 and boiler 120 provided in this embodiment can be started only when three conditions are met simultaneously, which can prevent dry burning and has higher safety.

[0049] This embodiment also provides a boiler control method applied to the aforementioned high-pressure water circuit system 100. Please refer to... Figure 4 , Figure 4 The diagram shown is a flowchart of a boiler control method provided in this embodiment. The boiler control method may include the following steps: Step S101: When the circuit breaker 150 is in the closed state, acquire the status information of the control valve 130 and the pressure value detected by the pressure sensor 140.

[0050] In step S102, if the control valve 130 is in the open state and the pressure value is greater than or equal to the first preset pressure, then control the boiler 120 to start.

[0051] Step S103: After the boiler 120 is started, the status information and pressure value of the control valve 130 are obtained in real time.

[0052] In step S104, if the circuit breaker 150 switches to the open state, or the control valve 130 switches to the open state, or the pressure value is less than the first preset pressure, then the boiler 120 is controlled to stop.

[0053] In practice, the power supply 160 that supplies power to the boiler 120 also supplies power to the control module 170, detection device 180, and pressure sensor 140 through the circuit breaker 150. When the circuit breaker 150 is closed, the boiler 120, control module 170, detection device 180, and pressure sensor 140 are energized, and one of the three conditions for the boiler 120 to start is met. At this time, the control module 170 determines whether the remaining two conditions are met based on the detection results of the detection device 180 and the pressure sensor 140, which serves as the basis for controlling the start of the boiler 120.

[0054] The boiler control method provided in this embodiment can prevent the boiler from dry burning at 120°C by limiting three conditions, thus providing higher safety.

[0055] In addition, this embodiment also provides a road maintenance vehicle, including the aforementioned high-pressure water system 100. Benefiting from the advantages of the high-pressure water system 100, the road maintenance vehicle provided in this embodiment has the characteristic of higher safety.

[0056] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A high-pressure water circuit system, characterized in that, It includes a water pump (110), a boiler (120), a control valve (130), a pressure sensor (140), a control module (170), and a detection device (180). The output end of the water pump (110) is fluidly connected to the input end of the boiler (120), and the output end of the boiler (120) is used to connect to a water-using device (300). The control valve (130) is installed on the pipeline between the water pump (110) and the boiler (120) to control the connection or disconnection between the output end of the water pump (110) and the input end of the boiler (120); the pressure sensor (140) is installed at the output end of the water pump (110) to detect the pressure value at the output end of the water pump (110). The boiler (120) is connected to the power supply (160) via a circuit breaker (150). The detection element (180) is used to detect the on / off state of the control valve (130). The control module (170) is electrically connected to the detection element (180), the pressure sensor (140), the circuit breaker (150), and the boiler (120) respectively. It is used to control the boiler (120) to start when the circuit breaker (150) is in the closed state, the detection element (180) detects that the control valve (130) is in the open state, and the pressure value is greater than or equal to the first preset pressure.

2. The high-pressure water circuit system according to claim 1, characterized in that, The detection element (180) is a proximity switch, and the control valve (130) is provided with a switching handle (134) for switching its working state. When the control valve (130) is in the conducting state, the switching handle (134) is in the sensing area of ​​the proximity switch, triggering the proximity switch to send a conduction signal to the control module (170).

3. The high-pressure water circuit system according to claim 1, characterized in that, The control valve (130) is a three-way valve with a first port (131), a second port (132) and a drain port (133). The first port (131) is fluidly connected to the output end of the water pump (110), and the second port (132) is fluidly connected to the input end of the boiler (120). When the control valve is in the on state, the first interface (131) is connected to the second interface (132), and the drain interface (133) is disconnected from the first interface (131) and the second interface (132) respectively; when the control valve is in the off state, the first interface (131) is disconnected from the second interface (132) and the drain interface (133) respectively, and the second interface (132) is connected to the drain interface (133).

4. The high-pressure water circuit system according to claim 1, characterized in that, It also includes a first unloading valve (191), which is disposed on the pipeline between the pressure sensor (140) and the control valve (130), and the first unloading valve (191) is fluidly connected to the water tank (195).

5. The high-pressure water circuit system according to claim 4, characterized in that, It also includes a branch pipe (192), one end of which is connected to the pipe between the first unloading valve (191) and the control valve (130), and the other end is used to connect to the water supply device (300). A second unloading valve (193) is provided on the branch pipe (192), and the second unloading valve (193) is fluidly connected to the water tank (195).

6. The high-pressure water circuit system according to claim 5, characterized in that, A high-pressure ball valve (194) is also provided on the branch pipeline (192), and the high-pressure ball valve (194) is located upstream of the second unloading valve (193).

7. A road maintenance vehicle, characterized in that, Includes the high-pressure water system (100) as described in any one of claims 1-6.

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