Spray gun

Abstract

The utility model relates to the technical field of spraying devices, in particular to a spraying gun. The spray gun comprises a liquid inlet valve and a detection device used for detecting water pressure, and the detection device comprises a valve assembly communicated with the liquid inlet valve and a Hall assembly close to the valve assembly. The valve assembly can be driven by liquid pressure to generate displacement, and the Hall assembly can respond to the displacement action of the valve assembly and generate a corresponding electric signal. According to the spray gun, the liquid spraying pressure value of the spray gun can be detected in real time through the detection device, and the pressure value is displayed to a user through the display assembly.

Description

Technical Field

[0001] This utility model relates to the field of spraying device technology, specifically to a spray gun. Background Technology

[0002] With the development of high-pressure cleaning technology, people have increasingly higher requirements for the functionality of cleaning jet spray guns. For example, different spray pressures are needed for different cleaning areas during the operation of the spray gun, and users can equip themselves with adjustable pressure valves. However, with existing spray guns, users cannot know the spray pressure of the spray gun in real time, which brings many inconveniences to the cleaning process. Utility Model Content

[0003] In view of this, the present invention provides a spray gun that solves or at least alleviates one or more of the above-mentioned problems and other problems existing in the prior art.

[0004] To achieve the aforementioned objectives, this utility model provides a spray gun, which includes an inlet valve, a nozzle, and an outlet channel connecting the inlet valve and the nozzle. The spray gun also includes a detection device for detecting water pressure, which includes a valve assembly connected to the inlet valve and a Hall effect sensor close to the valve assembly. The valve assembly is capable of displacement driven by liquid pressure, and the Hall effect sensor is capable of responding to the displacement of the valve assembly and generating a corresponding electrical signal.

[0005] In the spray gun described above, optionally, the valve assembly includes a valve housing communicating with the inlet valve, a bracket provided inside the valve housing, the bracket being hydraulically driven to move within the valve housing, and a magnet provided at the end of the bracket extending toward the Hall effect assembly to be close to the Hall effect assembly.

[0006] Optionally, in the spray gun described above, the valve assembly further includes a pressure measuring part, which has a pressure measuring channel. The inside of the valve housing is connected to the liquid inlet valve through the pressure measuring channel, and the pressure measuring channel and the liquid outlet channel are located on the same straight line.

[0007] Optionally, in the spray gun described above, a valve stem is provided in the pressure measuring channel. The valve stem extends into the valve housing and is mounted on the bracket. The valve stem is movable within the pressure measuring channel and drives the bracket to move within the valve housing.

[0008] Optionally, in the spray gun described above, a spring is also provided inside the valve housing, with the two ends of the spring connected to the bracket and the end of the valve housing away from the pressure measuring channel, respectively.

[0009] In the spray gun described above, optionally, the bracket has a protruding mounting portion, the end of the valve housing has a protruding post, and the two ends of the spring are respectively sleeved on the outer periphery of the mounting portion and the outer periphery of the protruding post.

[0010] In the spray gun described above, optionally, a sealing ring is provided at the connection between the pressure measuring channel and the valve housing, and the valve stem extends through the sealing ring into the interior of the valve housing.

[0011] Optionally, in the spray gun described above, the detection device further includes a display component electrically connected to the Hall element. The display component includes a display panel and a circuit board electrically connected to the display panel. The circuit board is used to receive electrical signals from the Hall element and control the display panel to display pressure values ​​according to the electrical signals.

[0012] In the spray gun described above, optionally, the display assembly includes a housing and a cover plate disposed on the housing, and the display panel and the circuit board are mounted on the housing.

[0013] In the spray gun described above, optionally, the opening edge of the housing is provided with a snap-fit ​​part, the snap-fit ​​part has a groove, and the cover plate is provided with a buckle with a notch. When the buckle is snapped into the groove, the notch is located inside the snap-fit ​​part for disassembling the cover plate.

[0014] The spray gun detection device of this utility model includes a valve assembly and a Hall effect sensor. The valve assembly includes a valve housing and a bracket located inside the valve housing, with the inlet valve connected inside the valve housing. A magnet is provided at one end of the bracket extending towards the Hall effect sensor, and the magnet is close to the Hall effect sensor.

[0015] In use, external liquid enters the housing through the inlet valve. The liquid pressure drives the bracket to move within the valve housing. As the bracket moves, the magnetic field generated by the magnet causes the Hall element to generate a corresponding electrical signal, which is then sent to the display element to display the current liquid pressure being sprayed by the spray gun in real time. Attached Figure Description

[0016] The disclosure of this utility model will become more apparent from the accompanying drawings. It should be understood that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model.

[0017] Figure 1 This is a schematic diagram of the internal structure of one embodiment of the spray gun of this utility model.

[0018] Figure 2 for Figure 1 A cross-sectional schematic diagram of the detection device in an embodiment of the spray gun.

[0019] Figure 3 for Figure 1An exploded perspective view of the display component of the detection device in an embodiment of the spray gun.

[0020] Figure 4 for Figure 3 A partially enlarged schematic diagram of the display component of the detection device in an embodiment of the spray gun, showing the cover plate of the display component closing onto the housing.

[0021] Figure 5 for Figure 1 A partial enlarged view of the detection device in an embodiment of the spray gun, showing the valve assembly and the Hall assembly.

[0022] Reference numerals: 1-Gun handle; 11-Gun head; 12-Detection device; 13-Inlet valve; 14-Gun rod; 15-Outlet channel; 2-Valve assembly; 21-Pressure measuring part; 22-Pressure measuring channel; 24-Slot; 25-U-pin; 26-Sealing ring; 27-Washer; 3-Valve stem; 31-Spring; 32-Valve housing; 33-Protrusion; 4-Bracket; 41-Magnet; 43-Mounting part; 5-Hall assembly; 51-Hall housing; 52-Hall circuit board; 6-Display assembly; 61-Housing; 62-Cover plate; 63-Snap-on; 64-Notch; 65-First line port; 66-Snap-on part; 67-Slot; 7-Display panel; 71-Circuit board; 8-Power supply assembly; 81-Second line port. Detailed Implementation

[0023] Referring to the accompanying drawings and specific embodiments, the structure, composition, features, and advantages of the spray gun of this utility model will be described below by way of example; however, all descriptions should not be construed as limiting the present utility model in any way.

[0024] Furthermore, for any single technical feature described or implied in the embodiments mentioned herein, or any single technical feature shown or implied in the various drawings, the present invention still allows for any combination or deletion of these technical features (or their equivalents) without any technical obstacle. Therefore, these further embodiments according to the present invention should also be considered within the scope of the description herein.

[0025] It should also be noted that the terms "inner" and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship of the spray gun and its components shown in the accompanying drawings. They are used only for the convenience of describing this disclosure and simplifying the description, and do not 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 disclosure.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature.

[0027] from Figure 1 As can be seen, the spray gun of this utility model includes a gun head 11, a gun rod 14 and a gun handle 1 connected in sequence, and a liquid inlet valve 13 is provided near the gun handle 1. The liquid inlet valve 13 is connected to the gun head 11 through the liquid outlet channel 15 in the gun rod 14.

[0028] The spray gun of this utility model also includes a detection device 12 for detecting the pressure of the liquid sprayed by the spray gun. The detection device 12 is located on the gun barrel 14 away from the gun head 11. Figure 1 As shown, the detection device 12 includes a valve assembly 2 connected to the inlet valve 13, a Hall component 5 disposed close to the valve assembly 2, a display component 6 electrically connected to the Hall component 5, and a power supply component 8 that supplies power to the Hall component 5 and the display component 6.

[0029] In use, external liquid can enter the spray gun through the inlet valve 13 and drive the valve assembly 2 to move. The Hall component 5 can respond to the movement of the valve assembly 2 and generate an electrical signal, which is sent to the display component 6 to display the pressure value of the liquid inside the spray gun.

[0030] Combination Figure 2 As can be seen, the display component 6 includes a display panel 7, a circuit board 71 for controlling the display panel 7, and a first wiring port 65 for wiring. The power supply component 8 is provided with a second wiring port 81 for wiring. The wiring harness of the power supply component 8 is led out through the second wiring port 81 and supplies power to the display component 6 and the Hall component 5. The wiring harness of the circuit board 71 is electrically connected to the power supply component 8 and the Hall component 5 through the first wiring port 65.

[0031] Furthermore, both the first line port 65 and the second line port 81 may be equipped with waterproof plugs (not shown in the figure) to prevent liquid from entering through the first line port 65 and the second line port 81 and damaging the display component 6 and the power supply component 8.

[0032] from Figure 3 It can be clearly seen that the display component 6 also includes a housing 61 and a cover plate 62. The circuit board 71 is installed inside the housing 61, and the first line port 65 is located on the cover plate 62, which closes onto the housing 61. Specifically, the opening edge of the housing 61 is provided with a snap-fit ​​portion 66, which has a slot 67 (e.g., Figure 4 As shown), and the edge of the cover plate 62 is provided with a corresponding buckle 63, which protrudes laterally from the edge of the cover plate 62. When the cover plate 62 closes the housing 61, the buckle 63 is engaged in the groove of the engaging part 66.

[0033] Furthermore, such as Figure 4 As shown, the buckle 63 may also have a notch 64. When the buckle 63 is engaged with the engaging part 66, the end of the buckle 63 passes through the groove of the engaging part 66 and protrudes outward from the housing. At this time, the notch 64 is located inside the engaging part 66. During disassembly, a tool can be used to pry the notch 64 to easily remove the buckle 63 from the groove 67 of the engaging part 66, thereby making it easy to remove the cover plate 62 from the housing 61.

[0034] from Figure 5 As can be seen, the Hall component 5 includes a Hall housing 51 and a Hall circuit board 52 installed inside the Hall housing 51.

[0035] from Figure 5 It can also be seen that the valve assembly 2 includes a pressure measuring part 21 and a valve housing 32 connected to the pressure measuring part 21. Specifically, the pressure measuring part 21 includes a pressure measuring channel 22 communicating with the inlet valve 13, and a valve stem 3 disposed within the pressure measuring channel 22. The pressure measuring channel 22 and the outlet channel 15 are located on the same straight line and are respectively located on both sides of the inlet valve 13, that is, the liquid entering the inlet valve 13 can also enter the pressure measuring channel 22. The fact that the pressure measuring channel 22 and the outlet channel 15 are arranged on the same straight line allows the hydraulic pressure of the liquid entering the pressure measuring channel 22 to be the same as the hydraulic pressure of the liquid entering the outlet channel 15, thereby making the measured pressure value more accurate.

[0036] The valve housing 32 is fitted onto the port of the pressure measuring part 21 and fixed by a U-shaped pin 25. The interior of the valve housing 32 communicates with the pressure measuring channel 22. A sealing ring 27 and a gasket 27 are provided at the connection between the interior of the valve housing 32 and the port of the pressure measuring channel 22 to prevent liquid entering the pressure measuring channel 22 from entering the interior of the valve housing 32.

[0037] The valve housing 32 is also provided with a bracket 4 and a spring 31 in sequence. As shown in the figure, the valve stem 3 extends through the sealing ring 27 and the gasket 27 into the valve housing 32 and is installed on the bracket 4. The valve stem 3 can move in the pressure measuring channel 22 and in the valve housing 32, and drive the bracket 4 to move in the valve housing 32.

[0038] The two ends of the spring 31 are respectively connected to the bracket 4 and the end of the valve housing 32 away from the pressure measuring channel 22. In order to facilitate the installation of the spring 31, the bracket 4 is provided with a mounting part 43, which protrudes in the direction away from the pressure measuring channel 22, so that one end of the spring 31 can be sleeved on the outer periphery of the mounting part 43, and the extended end of the valve stem 3 can be embedded in the interior of the mounting part 43.

[0039] Furthermore, a protruding post 33 is provided at the end of the valve housing 32 in the direction of the pressure measuring channel 22, and the other end of the spring 31 can be sleeved on the protruding post 33, so that the position of the spring 31 in the valve housing 32 can be more firmly fixed.

[0040] from Figure 5 It can also be seen that a slot 24 is provided on the side of the valve housing 32 near the Hall component 5. The direction in which the slot 24 extends along the edge of the valve housing 32 is consistent with the compression direction of the spring 31, and the bracket 4 can move along the slot 24.

[0041] As shown in the figure, one end of the bracket 4 extends from the slot 24 toward the Hall element 5 and is close to the Hall element 5, meaning that the Hall element 5 is located above the bracket 4 in the figure. A magnet 41 is installed at the end of the bracket 4 near the Hall element 5. When the bracket 4 moves along the slot 24, it can drive the magnet 41 to move. The movement of the magnet 41 can affect the Hall circuit board 52 inside the Hall element 5, causing it to emit an electrical signal.

[0042] When using, such as Figure 2 As shown by the upward arrow, external liquid enters through the inlet valve 13 of the spray gun and, as shown by the left arrow, is sprayed out through the outlet channel 15 towards the nozzle head 11. Simultaneously, some liquid, as shown by the right arrow, enters the pressure measuring channel 22. The liquid pressure pushes the valve stem 3 located within the pressure measuring channel 22, causing it to move away from the nozzle head 11 towards the valve housing 32. The valve stem 3 then drives the bracket 4 to overcome the elastic force of the spring 31 and move away from the nozzle head 11.

[0043] It is understood that the different positions of the bracket 4 indicate different hydraulic pressures of the liquid inside the spray gun. The magnet 41 at the end of the bracket 4 moves with the bracket 4, influencing the Hall circuit board 52 inside the Hall component 5 through the magnetic field, causing it to transmit an electrical signal to the circuit board 71 of the display component 6. Based on the received electrical signal, the circuit board 71 controls the display panel 7 to display the liquid pressure value. The pressure value displayed on the display panel 7 can be either displayed as a pressure level via an LED strip or as a numerical value.

[0044] When there is no hydraulic fluid in the spray gun, the spring force of the spring 31 can cause the bracket 4 to return to its original position at the connection between the valve housing 32 and the pressure measuring channel 22, and to be in close contact with the washer 27.

[0045] Furthermore, to save power, the pressure value display time on the display panel 7 can be set. That is, when the pressure value does not change, the display panel 7 will turn off when the set time is reached, so as to achieve energy saving.

[0046] The detection device 12 of this invention can move the valve stem 3 of its valve assembly 2, which in turn moves the bracket 4, causing the magnet 41 at the end of the bracket 4 to move. This moves the magnet 41, affecting the Hall circuit board 52 inside the Hall assembly 5 located nearby. The Hall circuit board 52 then generates an electrical signal based on the liquid pressure inside the spray gun, which is sent to the display assembly 6 to display the pressure value. Therefore, the detection device 12 of this invention can be automatically activated to display the pressure value of the liquid being sprayed by the spray gun in real time.

[0047] The technical scope of this utility model is not limited to the contents of the above description. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the scope of this utility model.

Claims

1. A spray gun comprising a liquid inlet valve (13), a gun head (11) and a liquid outlet channel (15) communicating the liquid inlet valve (13) with the gun head (11), characterized in that, The spray gun also includes a detection device (12) for detecting water pressure. The detection device (12) includes a valve assembly (2) connected to the liquid inlet valve (13) and a Hall component (5) close to the valve assembly (2). The valve assembly (2) can be driven by liquid pressure to generate displacement, and the Hall component (5) can respond to the displacement action of the valve assembly (2) and generate a corresponding electrical signal.

2. The lance of claim 1, wherein The valve assembly (2) includes a valve housing (32) communicating with the inlet valve (13). A bracket (4) is provided inside the valve housing (32). The bracket (4) is hydraulically driven and can move within the valve housing (32). A magnet (41) is provided at the end of the bracket (4) and extends toward the Hall assembly (5) to be close to the Hall assembly (5).

3. The lance of claim 2, wherein The valve assembly (2) further includes a pressure measuring part (21), which is provided with a pressure measuring channel (22). The valve housing (32) is connected to the inlet valve (13) through the pressure measuring channel (22). The pressure measuring channel (22) and the outlet channel (15) are located on the same straight line.

4. The lance of claim 3, wherein The pressure measuring channel (22) is provided with a valve stem (3), which extends into the valve housing (32) and is installed on the bracket (4). The valve stem (3) can move within the pressure measuring channel (22) and drive the bracket (4) to move within the valve housing (32).

5. The lance of claim 4, wherein The valve housing (32) is also provided with a spring (31), and the two ends of the spring (31) are respectively connected to the bracket (4) and the end of the valve housing (32) away from the pressure measuring channel (22).

6. The lance of claim 5, wherein The bracket (4) has a mounting part (43) protruding, the valve housing (32) has a protruding post (33) at its end, and the two ends of the spring (31) are respectively sleeved on the outer periphery of the mounting part (43) and the outer periphery of the protruding post (33).

7. The lance of claim 4 wherein, A sealing ring (26) is provided at the connection between the pressure measuring channel (22) and the valve body (32), and the valve stem (3) extends through the sealing ring (26) into the interior of the valve body (32).

8. The lance of claim 1 wherein, The detection device (12) further includes a display component (6) electrically connected to the Hall component (5). The display component (6) includes a display panel (7) and a circuit board (71) electrically connected to the display panel (7). The circuit board (71) is used to receive the electrical signal from the Hall component (5) and control the display panel (7) to display the pressure value according to the electrical signal.

9. The lance of claim 8, wherein, The display component (6) includes a housing (61) and a cover plate (62) covering the housing (61), and the display panel (7) and the circuit board (71) are mounted on the housing (61).

10. The lance of claim 9, wherein The opening edge of the housing (61) is provided with a snap-fit ​​part (66), the snap-fit ​​part (66) has a groove (67), and the cover plate (62) is provided with a buckle (63) with a notch (64). When the buckle (63) is snapped into the groove (67), the notch (64) is located inside the snap-fit ​​part (66) for disassembling the cover plate (62).

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