A pneumatic hand control lance and a pneumatic hand control lance assembly

Abstract

The application discloses a kind of pneumatic hand control spray gun and pneumatic hand control spray gun assembly, including gun body, low pressure overflow nozzle, high pressure nozzle, the low pressure control chamber is formed with in the gun body inside low pressure overflow nozzle rear, and first gas control chamber, low pressure control valve core is arranged in the low pressure control chamber, gas control valve group is arranged in the first gas control chamber, second gas control chamber is formed with in the gas control valve group, gas control valve core is arranged in the second gas control chamber, the first gas control pipeline of two external pump gas sources is communicated with in the top of the second gas control chamber.The application is integrated on the basis of traditional high pressure water spray gun pneumatic hand control assembly and high pressure overflow component, so that it has the advantages of single low intensity, low fatigue, fast response, effective control overflow unloading.

Description

Technical Field

[0001] This invention relates to the field of water gun technology, and more particularly to a pneumatic manually controlled spray gun and a pneumatic manually controlled spray gun assembly. Background Technology

[0002] In high-pressure water cleaning operations, high-pressure water spray guns are indispensable tools. Traditional spray guns, regardless of the control method used, inevitably have various problems and drawbacks. For example, manual overflow spray guns are labor-intensive, and the hand holding the trigger is prone to fatigue, especially when operating under ultra-high pressure (pressure > 150MPa), which can easily lead to fatigue and safety hazards. For example, when the spray gun is controlled by an overflow valve (electric or pneumatic), it requires the tacit cooperation of two operators. Poor communication can easily lead to untimely pressure relief and overflow, which also poses a significant safety hazard. Furthermore, electric or electromagnetic control methods are not suitable for flammable and explosive environments such as oil tanks, chemical storage tanks, and dust workshops where electricity and fire are prohibited. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and propose a pneumatic manual control spray gun and a pneumatic manual control spray gun assembly. Based on the traditional high-pressure water spray gun, it integrates a pneumatic manual control assembly and a high-pressure overflow assembly, giving it the advantages of being able to operate with low intensity, low fatigue, rapid response, and effective control of overflow unloading by a single person.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A pneumatic manually controlled spray gun includes a gun body, a low-pressure overflow nozzle, and a high-pressure nozzle. Inside the gun body, a low-pressure control chamber and a first pneumatic control chamber are formed behind the low-pressure overflow nozzle. A low-pressure control valve core is disposed within the low-pressure control chamber. A pneumatic control valve assembly is disposed within the first pneumatic control chamber. A second pneumatic control chamber is formed inside the pneumatic control valve assembly. A pneumatic control valve core is disposed inside the second pneumatic control chamber. The top of the second pneumatic control chamber is connected to a first pneumatic control pipe with two external pump air sources. The bottom of the second pneumatic control chamber is provided with a second pneumatic control pipe that communicates with the first pneumatic control chamber. A pin assembly is slidably and sealed inside the second pneumatic control pipe. The first end of the pin assembly extends into the low-pressure control chamber and abuts against the surface of the low-pressure control valve core.

[0006] Preferably, the pneumatic control valve core includes a valve core assembly located inside the second pneumatic control chamber and a control baffle located outside the second pneumatic control chamber, which are fixedly connected by a connecting rod.

[0007] Preferably, the gun body further includes a control wrench rotatably connected, the top of the control wrench being provided with a control protrusion, wherein a control baffle is located on the movement path of the control protrusion.

[0008] Preferably, an elastic element for resetting is provided between the valve core assembly and the second pneumatic control chamber.

[0009] Preferably, the first end of the ejector pin assembly is provided with an ejector pin protrusion, the surface of the low-pressure control valve core is formed with a control groove that matches the ejector pin protrusion, and the second end of the ejector pin assembly is fixedly connected with a sealing piston.

[0010] Preferably, the front end of the gun body is provided with a high-pressure pipeline and a low-pressure pipeline, and the high-pressure pipeline and the low-pressure pipeline are connected at their roots.

[0011] A pneumatic manually controlled spray gun assembly includes the aforementioned pneumatic manually controlled spray gun and a delivery hose. The pneumatic manually controlled spray gun and the delivery hose are connected by a vortex mixing device. The vortex mixing device includes a mixing sleeve with a delivery channel formed inside. A one-way barrier component is installed at the bottom of the mixing sleeve, forming a storage chamber between the one-way barrier component and the inner wall of the mixing sleeve. A vortex device is installed in the middle of the mixing sleeve, with the position of the vortex device corresponding to the position of the storage chamber. The vortex device includes a vortex cylinder with a vortex opening on its surface, the vortex opening being located inside the storage chamber. The vortex opening is connected to a first pneumatic control pipe.

[0012] Preferably, a control piston is slidably and sealed on the inner wall of the vortex cylinder, a control rod is fixedly connected to the side wall of the control piston, a reset elastic element is sleeved on the outer side of the control rod, an air inlet is opened on the surface of the vortex cylinder, the air inlet is located on the side away from the vortex opening, the air inlet is connected to the first first air control pipe, and a one-way valve is provided in the vortex opening.

[0013] Preferably, the unidirectional barrier component includes a flexible barrier body with a barrier opening formed at the top. The barrier opening is normally closed. Arc-shaped support sleeves are fixedly connected to both sides of the barrier opening. The vortex device is symmetrically arranged in two sets, and the support sleeves are fixedly connected to the ends of the corresponding control rods.

[0014] Preferably, there are several vortex mixing devices arranged in parallel, and a mounting ring is fixedly provided at the base end of the mixing sleeve, and a mounting groove that mates with the mounting ring is opened at the top end of the mixing sleeve.

[0015] Compared with the prior art, the beneficial effects of this invention are as follows:

[0016] The pneumatic control component controls the airflow direction under the action of the trigger, completing the inflation and deflation / retraction of the ejector pin. The high-pressure overflow component controls the direction of the high-pressure water under the action of the ejector pin, switching between high-pressure operation and pressure relief overflow states. Based on the traditional high-pressure water spray gun, the pneumatic control component and the high-pressure overflow component are integrated, giving it the advantages of single-person operation with low intensity, low fatigue, rapid response, and effective control of overflow and unloading. The pneumatic control component only needs to be connected to an air source and does not have an electrical control unit. Compared with the traditional overflow type spray gun, the manual control force is smaller and the intensity is lower. The high-pressure overflow component adopts a separate structure of valve core and ejector pin, which can effectively reduce valve core wear and improve its service life.

[0017] By incorporating components such as unidirectional barrier elements, solid cleaning media can be retained in one direction, preventing it from continuously descending and clogging the pipes. It can also be discharged along the shortest path during subsequent cleaning processes, improving the cleaning effect in the initial stage of the cleaning equipment and avoiding waste of cleaning media. By incorporating structures such as vortex tubes and vortex openings, a directional vortex can be formed in the storage chamber during the spray gun startup, disturbing the solid sand and gravel deposited at the bottom of the storage chamber, accelerating the mixing process, improving the mixing effect, and further enhancing the overall cleaning effect of the equipment. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the internal structure of a pneumatic manual spray gun proposed in this invention;

[0019] Figure 2 for Figure 1 A magnified structural diagram at point A;

[0020] Figure 3 for Figure 1 A magnified structural diagram at point B;

[0021] Figure 4 A three-dimensional structural diagram of a pneumatic manual spray gun assembly;

[0022] Figure 5 A three-dimensional structural diagram of a vortex mixing device;

[0023] Figure 6 for Figure 5 A top-view structural diagram;

[0024] Figure 7 for Figure 6 A magnified structural diagram at point C in the diagram.

[0025] In the diagram: 100, gun body; 110, high-pressure pipeline; 120, low-pressure pipeline; 130, control wrench; 131, control protrusion; 140, low-pressure control chamber; 150, first gas control chamber; 200, high-pressure nozzle; 300, low-pressure overflow nozzle; 400, low-pressure control valve core; 410, reset groove; 420, control groove; 500, ejector pin assembly; 510, ejector pin protrusion; 520, sealing piston; 600, gas control valve assembly; 610, second gas control chamber; 620, first gas control pipeline; 630, second gas control... Pipeline; 700, pneumatic valve core; 710, valve core assembly; 720, control baffle; 800, vortex mixing device; 810, mixing sleeve; 811, mounting groove; 812, mounting ring; 813, conveying channel; 820, vortex device; 821, vortex tube; 822, control piston; 823, control rod; 824, reset elastic element; 825, vortex opening; 830, one-way barrier assembly; 831, barrier body; 832, barrier opening; 833, support sleeve; 840, storage chamber; 900, conveying hose. Detailed Implementation

[0026] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0027] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0028] See attached document Figure 1 - Appendix Figure 3A pneumatically controlled spray gun includes a gun body 100, a low-pressure overflow nozzle 300, and a high-pressure nozzle 200. A high-pressure pipe 110 and a low-pressure pipe 120 are provided at the front end of the gun body 100, with their roots connected and externally connected to a high-pressure water source. The end of the high-pressure pipe 110 is connected to the high-pressure nozzle 200, and the end of the low-pressure pipe 120 is connected to the low-pressure overflow nozzle 300. Inside the gun body 100, behind the low-pressure overflow nozzle 300, a low-pressure control chamber 140 and a first pneumatic control chamber 150 are formed. A low-pressure control valve core 400 is provided in the low-pressure control chamber 140, and a pneumatic control valve assembly 600 is provided in the first pneumatic control chamber 150. The low-pressure control valve assembly 600 can control the low-pressure nozzle. The position of the valve core 400 allows it to fit against the surface of the low-pressure overflow nozzle 300, thereby controlling the opening and closing of the low-pressure overflow nozzle 300. When the low-pressure control valve core 400 moves towards the low-pressure overflow nozzle 300, it can cut off the low-pressure pipeline 120, at which point high-pressure water can be ejected from the high-pressure nozzle 200, forming a high-pressure water flow. When the low-pressure control valve core 400 moves away from the low-pressure overflow nozzle 300, water can overflow from the low-pressure overflow nozzle 300, at which point the high-pressure nozzle 200 is in a low-pressure closed state. Controlling the low-pressure control valve core 400 through the pneumatic valve assembly 600 reduces the force required for the operator to hold the control gun body 100, making it easier for the operator to control the water flow.

[0029] A second pneumatic control chamber 610 is formed inside the pneumatic control valve assembly 600. A pneumatic control valve core 700 is disposed inside the second pneumatic control chamber 610. The top of the second pneumatic control chamber 610 is connected to two external pump air sources via first pneumatic control pipes 620. The bottom of the second pneumatic control chamber 610 is connected to a second pneumatic control pipe 630 that communicates with the first pneumatic control chamber 150. A pin assembly 500 is slidably and sealed inside the second pneumatic control pipe 630. The first end of the pin assembly 500 extends into the low-pressure control chamber 140 and abuts against the surface of the low-pressure control valve core 400. The first pneumatic control pipe 620... An external control air source can be pumped in through the first air control pipe 620 on the right. In the depressurized state, the gas is discharged from the first air control pipe 620 on the left. In the high-pressure jet state, the air control valve core 700 moves to the leftmost position. At this time, the second air control pipe 630 is connected to the first air control pipe 620 on the right, which can pump the gas into the first air control chamber 150 to push the sealing piston 520 to move outward, thereby pushing the ejector assembly 500 to move outward, and finally pushing the low-pressure control valve core 400 to move back and forth through the ejector assembly 500.

[0030] It should be noted that the low-pressure control valve core 400 is located at the end of the low-pressure pipeline 120. A reset groove 410 is formed on the left side of the low-pressure control valve core 400. When the first pneumatic control pipeline 620 is not connected to gas, the water pressure in the low-pressure pipeline 120 can push the low-pressure control valve core 400 away from the low-pressure overflow nozzle 300 through the reset groove 410, thus initiating the automatic control reset process. Through the above device, in the depressurization state, the reset groove 410 can automatically move away from the low-pressure overflow nozzle 300 to open the entire device and achieve automatic depressurization. In the high-pressure jet state, a high-pressure air source connected to the first pneumatic control pipeline 620 can push the low-pressure control valve core 400 towards the low-pressure overflow nozzle 300 through the pin assembly 500, which can block the water flow formed at the low-pressure pipeline 120. By using air pressure to offset the water pressure, the force required for the operator to control the low-pressure overflow nozzle 300 can be reduced, making it easier for the operator to operate and control.

[0031] The pneumatic control valve core 700 includes a valve core assembly 710 located inside the second pneumatic control chamber 610 and a control baffle 720 located outside the second pneumatic control chamber 610. The two are fixedly connected by a connecting rod. The valve core assembly 710 includes three sets of spaced baffles, all located inside the second pneumatic control chamber 610 and slidably connected in a sealed manner. By controlling the position of the baffles, the communication state between the two sets of first pneumatic control pipes 620 and second pneumatic control pipes 630 can be controlled. When the high-pressure nozzle 200 is in a depressurized state, it controls the connection between the second pneumatic control pipe 630 and the first pneumatic control pipe 620. In the closed state, the internal pressure of the ejector assembly 500 decreases, and the ejector assembly 500 and the low-pressure control valve core 400 move away from the low-pressure overflow nozzle 300 under the action of water pressure; the high-pressure nozzle 200 is in a high-pressure state, and at this time, the first air control pipe 620 and the second air control pipe 630 are connected, and gas can be pumped into the first air control chamber 150 to increase the pressure and thus push the ejector assembly 500 to move closer to the low-pressure overflow nozzle 300, so that the low-pressure control valve core 400 is in a sealed state against the low-pressure overflow nozzle 300.

[0032] It should be noted that the pneumatic control valve group 600 on the right is connected to an external high-pressure air source, while the pneumatic control valve group 600 on the left is used for pressure relief and exhaust.

[0033] The gun body 100 also includes a control wrench 130 rotatably connected. The top of the control wrench 130 is provided with a control protrusion 131. The control baffle 720 is located on the movement path of the control protrusion 131. The operator can easily hold the control wrench 130 to open and close by holding the gun body 100. During the rotation and opening and closing process, the control wrench 130 can abut against the control baffle 720, and finally adjust the position of the control baffle 720 to adjust and control the conduction state of the pneumatic valve core 700. Furthermore, an elastic element for reset is provided between the valve core assembly 710 and the second pneumatic chamber 610. It can be selected as a reset spring, which can apply a force to the pneumatic valve core 700 in a direction away from the low-pressure overflow nozzle 300. It can cooperate with water pressure to accelerate the reset of the pneumatic valve core 700.

[0034] The first end of the ejector assembly 500 is equipped with an ejector protrusion 510. The surface of the low-pressure control valve core 400 forms a control groove 420 that matches the ejector protrusion 510. The second end of the ejector assembly 500 is fixedly connected to a sealing piston 520. The ejector protrusion 510 and the sealing piston 520 are connected by a connecting rod, which can extend the sealing distance and enhance the sealing effect. The ejector assembly 500 and the low-pressure control valve core 400 are designed separately, which facilitates assembly and maintenance.

[0035] When this pneumatic manual spray gun is in use, the high-pressure nozzle 200, under depressurized conditions, controls the second pneumatic control pipe 630 and the first pneumatic control pipe 620 to be in a closed state. At this time, the internal pressure of the ejector assembly 500 decreases, and the ejector assembly 500 and the low-pressure control valve core 400 move away from the low-pressure overflow nozzle 300 under the action of water pressure. At this time, some water flows out from the low-pressure overflow nozzle 300, thus achieving depressurization.

[0036] When the high-pressure nozzle 200 is under high pressure, the first air control pipe 620 and the second air control pipe 630 are connected. At this time, gas can be pumped into the first air control chamber 150, increasing the pressure and pushing the ejector assembly 500 to move closer to the low-pressure overflow nozzle 300. This allows the low-pressure control valve core 400 to be in a sealed state with the low-pressure overflow nozzle 300, preventing water from overflowing from the low-pressure overflow nozzle 300. The pressure at the high-pressure nozzle 200 increases, forming a high-pressure water flow.

[0037] See attached document Figure 4 - Appendix Figure 7A pneumatic manual spray gun assembly includes the aforementioned pneumatic manual spray gun and a delivery hose 900. The pneumatic manual spray gun and the delivery hose 900 are connected by a vortex mixing device 800. The delivery hose 900 can pump cleaning liquid containing sand and gravel, which is then sprayed out from the end high-pressure nozzle 200 to complete the high-pressure rinsing of the target surface. The vortex mixing device 800 can connect the high-pressure nozzle 200 and the delivery hose 900 to complete the delivery of the mixed cleaning medium. At the same time, it can block and retain solid cleaning media such as sand and gravel, preventing them from falling freely under gravity when the gun body 100 is not in use and is suspended vertically. During the high-pressure cleaning process, a vortex is formed in the vortex mixing device 800, which agitates the sand and gravel in the sediment state, ensuring efficient mixing of solid and liquid cleaning media. This ensures that the spray gun can quickly enter the cleaning working state, avoids waste of cleaning liquid, and prevents solid cleaning media from accumulating inside the pipe, ensuring the normal progress of the cleaning process, improving the cleaning effect of the spray gun, and extending the overall service life of the spray gun.

[0038] Please refer to the appendix for details. Figure 5 Appendix Figure 7 The vortex mixing device 800 includes a mixing sleeve 810, inside which a conveying channel 813 is formed. The conveying channel 813 allows the solid-liquid mixed cleaning medium to pass through. A one-way blocking component 830 is installed at the bottom of the mixing sleeve 810. The one-way blocking component 830 can unidirectionally block the solid cleaning medium. When the medium is not being conveyed in the conveying channel 813, the solid cleaning medium can be retained. A storage chamber 840 is formed between the one-way blocking component 830 and the inner wall of the mixing sleeve 810. When the medium is being conveyed, the one-way blocking component 830 is in an open state, allowing the solid-liquid mixed cleaning medium to pass through, achieving an efficient conveying process. When the medium is not being conveyed, the one-way blocking component 830 is in a closed state, allowing the solid cleaning medium to be retained.

[0039] A vortex device 820 is installed in the middle of the mixing sleeve 810, and the position of the vortex device 820 corresponds to the position of the storage chamber 840. The vortex device 820 includes a vortex cylinder 821 with a vortex opening 825 on its surface. The vortex opening 825 is located inside the storage chamber 840. The vortex opening 825 is connected to the first air control pipe 620. In the working state, the gas overflowing from the first air control pipe 620 can be ejected from the vortex opening 825. The direction of the gas ejected from the vortex opening 825 is tangential to the direction of the inner wall of the reset elastic element 824. During the process of the gas ejected from the vortex opening 825, a directional vortex can be formed in the storage chamber 840. In the initial stage of operation, it can drive the flow of the solid sand and gravel deposited inside to ensure efficient mixing of solid and liquid cleaning media. At the same time, during continuous operation, the ejected gas can drive the mixing of the flowing solid and liquid media. The addition of a certain proportion of gaseous media can enhance the mixing effect of the cleaning media during the transportation process and improve the cleaning effect of the final high-pressure spray gun.

[0040] It should be noted here that the aforementioned first pneumatic control pipe 620 is an auxiliary pipe. Figure 3 The first pneumatic control pipe 620 on the left side can assist in controlling the position of the pneumatic control valve core 700 during the movement of the pneumatic control valve core 700 controlled by the control wrench 130, reducing the burden on the cleaning personnel's hands; at the same time, the overflowing gas can be recovered and reused, and can be injected into the mixing sleeve 810 at the initial stage of start-up to efficiently mix the solid medium settled in the storage chamber 840, improve the medium mixing and conveying effect, avoid the problem of uneven mixing of solid and liquid cleaning media at the initial stage of start-up of the spray gun, and improve the final cleaning efficiency.

[0041] A control piston 822 is slidably and sealed on the inner wall of the vortex tube 821. A control rod 823 is fixedly connected to the side wall of the control piston 822. A reset elastic element 824, which can be a reset spring, is sleeved on the outside of the control rod 823. This element can push the control piston 822 to a position away from the vortex opening 825. The cooperation between the control rod 823 and the reset spring ensures the stable movement of the control piston 822. An air inlet is opened on the surface of the vortex tube 821. The air inlet is located on the side away from the vortex opening 825 and is connected to the first air control pipe 620. A one-way valve is installed inside the vortex opening 825. A pump is pumped into the vortex tube 821 from the first air control pipe 620. During the gas inlet process, the control piston 822 is pushed to move towards the vortex opening 825. When the control piston 822 moves to the outside of the vortex opening 825, the vortex opening 825 can connect with the air inlet. At this time, the gas overflowing from the first gas control pipe 620 can be ejected through the vortex opening 825 and directly injected into the storage chamber 840, achieving efficient mixing of the internal settling medium. At the same time, by setting a one-way valve in the vortex opening 825, the gas is controlled to flow unidirectionally into the storage chamber 840, preventing the cleaning medium in the mixing sleeve 810 from flowing back into the vortex device 820, avoiding equipment damage and malfunction, and ensuring the normal operation of the overall structure.

[0042] As a preferred one-way barrier method, the one-way barrier component 830 includes a flexible barrier body 831, with a barrier opening 832 formed at the top of the barrier body 831. The barrier opening 832 is normally closed. Arc-shaped support sleeves 833 are fixedly connected to both sides of the barrier opening 832. The vortex device 820 is symmetrically arranged in two sets. The support sleeves 833 are fixedly connected to the ends of the corresponding control rods 823. The barrier body 831 can be made of an elastic rubber material. When the cleaning medium is not being transported, the barrier opening 832 is closed due to its own elasticity. The top of the barrier body 831 is in a closed state. The settled sand and gravel accumulate in the storage chamber 840 along the surface of the barrier body 831, which can retain the solid cleaning medium and prevent it from continuously falling and clogging the pipe. When the cleaning medium is flowing, the gas overflowing from the first air control pipe 620 can push the control piston 822 in the outer vortex device 820 to move inward. Under the action of the control rod 823, it can squeeze the inner barrier opening 832, so that the barrier opening 832 is in an open state under the action of external force, thereby reducing the resistance to the flow of the cleaning medium and ensuring the normal flow of the cleaning medium.

[0043] It should be noted that by setting up structures such as the control piston 822, control rod 823, and reset elastic element 824, the overflow gas pumped into the vortex tube 821 can quickly push the control piston 822 to move inward, achieving gas conduction control. At the same time, it can quickly push the inner blocking opening 832 to open and conduct, reducing the resistance to the flow of the cleaning medium. During the reverse movement, the pressure relief valve on the surface of the vortex tube 821 is opened. Under the action of the reset elastic element 824, the control piston 822 can quickly reset. During this process, the control rods 823 on both sides can quickly pull the blocking opening 832, achieving rapid closure of the blocking opening 832 and achieving a good blocking effect. The control rod 823 and the blocking opening 832 are connected by the support sleeve 833, which can achieve synchronous movement control and meet the requirements of rapid action.

[0044] Preferably, several vortex mixing devices 800 are arranged in parallel. By setting multiple sets of vortex mixing devices 800, the vortex distance can be extended, the whole structure can be separated, and the settled solid cleaning medium can be retained in sections, ensuring efficient and stable subsequent mixing. At the same time, the multiple sets of vortex mixing devices 800 can be detachably fixed. Specifically, the base end of the mixing sleeve 810 is fixedly provided with a mounting ring 812, and the top end of the mixing sleeve 810 has a mounting groove 811 that mates with the mounting ring 812. By aligning and rotating two sets of mixing sleeves 810 together, the two can be fixed, realizing the quick installation and fixing of the overall structure. Subsequently, one section of the vortex mixing device 800 can be replaced individually, reducing the overall production cost and improving the efficiency of later maintenance and replacement.

[0045] During the use of this pneumatic manual spray gun assembly, when the spray gun switches to high pressure, it can inject the overflow gas from the first pneumatic control pipe 620 into the mixing sleeve 810, forming a vortex at the storage chamber 840. During the start-up process, it accelerates the mixing of solid and liquid cleaning media in the storage chamber 840, improving the overall mixing and cleaning effect.

[0046] The overflowing gas is ejected from the vortex opening 825, which is tangential to the inner wall of the storage chamber 840 on the horizontal plane and inclined towards the bottom of the storage chamber 840. The ejected gas can drive the sand and gravel in the storage chamber 840 to flow in a directional manner and mix with the liquid, thereby improving the cleaning efficiency and ensuring the overall cleaning effect.

[0047] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A pneumatic manually controlled spray gun assembly, comprising a pneumatic manually controlled spray gun, the pneumatic manually controlled spray gun including a gun body (100), a low-pressure overflow nozzle (300), and a high-pressure nozzle (200), wherein a low-pressure control chamber (140) and a first pneumatic control chamber (150) are formed inside the gun body (100) behind the low-pressure overflow nozzle (300), a low-pressure control valve core (400) is provided in the low-pressure control chamber (140), a pneumatic control valve assembly (600) is provided in the first pneumatic control chamber (150), a second pneumatic control chamber (610) is formed inside the pneumatic control valve assembly (600), a pneumatic control valve core (700) is provided inside the second pneumatic control chamber (610), and the top of the second pneumatic control chamber (610) is connected to a first pneumatic control pipe (620) with two external pump air sources, characterized in that: It also includes a delivery hose (900), and the pneumatic manual spray gun is connected to the delivery hose (900) through a vortex mixing device (800). The vortex mixing device (800) includes a mixing sleeve (810), and a delivery channel (813) is formed inside the mixing sleeve (810). A one-way barrier component (830) is installed at the bottom of the mixing sleeve (810), and a storage chamber (840) is formed between the one-way barrier component (830) and the inner wall of the mixing sleeve (810). A vortex device (820) is installed in the middle of the mixing sleeve (810), and the position of the vortex device (820) corresponds to the position of the storage chamber (840). The vortex device (820) includes a vortex cylinder (821) with a vortex opening (825) on its surface. The vortex opening (825) is located inside the storage chamber (840), and the vortex opening (825) is connected to the first pneumatic control pipe (620) on the left side. In operation, the gas overflowing from the first gas control pipe on the left is ejected from the vortex opening, forming a directional vortex in the storage chamber and driving the solid sand and gravel deposited inside to flow. The inner wall of the vortex tube (821) is sealed and slidably equipped with a control piston (822). The control piston (822) is fixedly connected to a control rod (823) on its side wall. A reset elastic element (824) is sleeved on the outside of the control rod (823). An air inlet is opened on the surface of the vortex tube (821). The air inlet is located on the side away from the vortex opening (825). The air inlet is connected to the first first air control pipe (620). A one-way valve is provided inside the vortex opening (825). The unidirectional barrier component (830) includes a flexible barrier body (831), with a barrier opening (832) formed on the top of the barrier body (831). The barrier opening (832) is normally closed. Arc-shaped support sleeves (833) are fixedly connected to both sides of the barrier opening (832). The vortex device (820) is symmetrically arranged in two sets, and the support sleeves (833) are fixedly connected to the ends of the corresponding control rods (823).

2. The pneumatic manual spray gun assembly according to claim 1, characterized in that, The vortex mixing device (800) consists of several units arranged in parallel. The base end of the mixing sleeve (810) is fixedly provided with an installation ring (812), and the top end of the mixing sleeve (810) has an installation groove (811) that mates with the installation ring (812).

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