Polyurethane joint mixture liquid inlet valve with shaft-shaped rotary valve element and spray gun

Abstract

The polyurethane foam joint mixture liquid inlet valve with the shaft-shaped rotary valve element comprises a valve body, a liquid inlet channel and a liquid outlet channel are longitudinally arranged in the valve body, the shaft-shaped rotary valve element is installed in the middle of the valve body in a penetrating mode, and the shaft-shaped rotary valve element is installed in the middle of the valve body in a penetrating mode. A sealing boss and a flow channel allowing foam to pass through are arranged in the middle of the shaft-shaped rotary valve element, when the sealing boss coincides with an outlet of the liquid inlet channel, the liquid inlet valve is in a closed state, and when the sealing boss and the outlet of the liquid inlet channel are staggered, the flow channel can communicate with the liquid inlet channel and the liquid outlet channel to form a liquid passing channel. The liquid inlet valve is in an open state. By means of the structural design that the shaft-shaped rotary valve element transversely penetrates through the valve body, good isolation between the interior of the spray gun and the liquid inlet valve and outside air is achieved, meanwhile, the machining precision requirement is greatly lowered, the assembling efficiency is improved, the manufacturing cost is lowered, and large-range application and popularization are facilitated.

Description

Technical Field

[0001] This utility model belongs to the technical field of polyurethane foam sealant spray guns, and particularly relates to a polyurethane foam sealant inlet valve and spray gun with a shaft-shaped rotary valve core. Background Technology

[0002] In recent years, with the increasing popularity of polyurethane foam sealant both domestically and internationally, the quality of the spray guns used in conjunction with it has also improved, especially in terms of airtightness. The inlet valve (also known as an adapter), as a crucial component connecting the spray gun and the polyurethane foam sealant, has also received increasing attention. For example, Chinese patent CN203737471U, entitled "An Anti-adhesion Adapter," represents a beneficial attempt and improvement in preventing the foam sealant from curing and sticking through its internal structure. However, the ball valve structure of this technology suffers from high precision requirements, low assembly efficiency, and high manufacturing costs, hindering its widespread adoption in practical applications. Summary of the Invention

[0003] In order to overcome the shortcomings of the existing technology, this utility model provides a polyurethane foam sealant inlet valve with a shaft-shaped rotary valve core, which realizes a good isolation between the spray gun and the inside of the inlet valve and the outside air, while greatly reducing the processing accuracy requirements, improving assembly efficiency, reducing manufacturing costs, and facilitating wide-ranging application.

[0004] This utility model also provides a spray gun equipped with the above-mentioned liquid inlet valve, which achieves a good isolation between the spray gun and the inside of the liquid inlet valve and the outside air, while greatly reducing the processing accuracy requirements, improving assembly efficiency, reducing manufacturing costs, and facilitating widespread application.

[0005] The technical solution adopted in this utility model is:

[0006] A polyurethane foam sealant inlet valve with a shaft-shaped rotary valve core includes a valve body. The valve body has an inlet channel and an outlet channel arranged longitudinally. A shaft-shaped rotary valve core is installed through the middle of the valve body. The shaft-shaped rotary valve core has a sealing boss and a flow channel for foam to pass through in the middle. When the sealing boss coincides with the outlet of the inlet channel, the inlet valve is in a closed state. When the sealing boss is misaligned with the outlet of the inlet channel, the flow channel can connect the inlet channel and the outlet channel to form a liquid passage, and the inlet valve is in an open state.

[0007] Furthermore, the axial rotary valve core is provided with sealing elements on both sides of the flow channel to maintain the seal between the axial rotary valve core and the valve body.

[0008] Furthermore, a countersunk hole is provided in the middle of the sealing boss, and a sealing body is provided inside the countersunk hole.

[0009] Furthermore, the sealing body is preferably an elastic annular sealing ring, which allows the inlet of the liquid inlet valve to maintain a good seal while saving costs.

[0010] Furthermore, the end of the axial rotary valve core is provided with an axial limiting part to prevent the axial movement of the axial rotary valve core within the valve body, thus facilitating operation.

[0011] Furthermore, a radial limiting part is provided between the axial rotary valve core and the valve body, so that the axial rotary valve core can rotate within a set range, which facilitates operation.

[0012] Furthermore, a rotary switch is installed at the other end of the shaft-shaped rotary valve core to drive its rotation.

[0013] Alternatively, a radial limiting part is provided between the rotary switch and the valve body, so that the axial rotary valve core can rotate within a set range, which facilitates operation.

[0014] Furthermore, the outer side of the rotary switch is provided with indicators of the rotation direction and opening degree, making it easy for the operator to identify and use.

[0015] Furthermore, the rotary switch is provided with a rotating part, including a rotating handle and / or a textured surface, to facilitate rotation.

[0016] A spray gun includes a gun body with a grip, a sealing device, a trigger, a barrel, a nozzle, a ejector pin device, and an ejector pin opening adjustment and locking device. The barrel and nozzle are sequentially installed at the front end of the gun body. The trigger is hinged to the middle of the gun body. The ejector pin device is press-fitted into the gun body, trigger, and barrel through the ejector pin opening adjustment and locking device and is linked by the trigger. The gun body is equipped with the aforementioned polyurethane foam sealant inlet valve with a shaft-shaped rotary valve core.

[0017] The beneficial effects of this utility model are as follows: Through the structural design of the axial rotating valve core passing through the valve body, a good isolation is achieved between the inside of the spray gun and the liquid inlet valve and the outside air. At the same time, the processing accuracy requirements are greatly reduced, the assembly efficiency is improved, the manufacturing cost is reduced, and it is easy to promote and apply it on a large scale. Attached Figure Description

[0018] Figure 1 This is an exploded view of Embodiment 1 of this utility model;

[0019] Figure 2 This is a front view of Embodiment 1 of this utility model;

[0020] Figure 3 yes Figure 2 Sectional view along direction A;

[0021] Figure 4 yes Figure 3 A cross-sectional view along line B with the inlet valve in the closed position;

[0022] Figure 5 yes Figure 4 A cross-sectional view of the inlet valve in the open position;

[0023] Figure 6 This is a cross-sectional view of the valve body according to Embodiment 1 of this utility model;

[0024] Figure 7 This is a front view of the axial rotary valve core according to Embodiment 1 of this utility model;

[0025] Figure 8 yes Figure 7 The left view;

[0026] Figure 9 This is a front view of the rotary switch according to Embodiment 1 of this utility model;

[0027] Figure 10 yes Figure 9 The right view;

[0028] Figure 11 This utility model embodiment is applied to a schematic diagram of a spray gun.

[0029] In the diagram: 1. Gun body with grip; 2. Ejector pin opening adjustment and locking device; 3. Ejector pin device; 4. Trigger; 5. Sealing device; 6. Gun barrel; 7. Nozzle; 8. Inlet valve; 81. Valve body; 81a. Inlet channel; 81b. Outlet channel; 81c. Valve core mounting hole; 82. Shaft-shaped rotary valve core; 82a. Sealing boss; 82b. Flow channel; 82c. Seal mounting part; 82d. Axial limiting part; 82e. Rotary switch mounting part; 82f. Radial limiting part; 83. Rotary switch; 83a. Indicator mark; 83b. Rotating part; 84. Sealing body; 85. Seal; 86. Fastener. Detailed Implementation

[0030] The present invention will be further described below with reference to specific embodiments, but the present invention is not limited to these specific embodiments. Those skilled in the art should recognize that the present invention covers all alternatives, improvements and equivalents that may be included within the scope of the claims.

[0031] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. 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 indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more, unless otherwise expressly defined.

[0032] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of 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.

[0033] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0034] Example 1

[0035] like Figure 1-10This embodiment provides a polyurethane foam sealant inlet valve with a shaft-shaped rotary valve core, including a valve body 81. The valve body 81 has a longitudinally arranged inlet channel 81a and an outlet channel 81b. A shaft-shaped rotary valve core 82 is installed through the middle of the valve body 81. The shaft-shaped rotary valve core 82 has a sealing boss 82a and a flow channel 82b for foam to pass through in the middle. When the sealing boss 82a coincides with the outlet of the inlet channel 81a, the inlet valve is in a closed state. When the sealing boss 82a is misaligned with the outlet of the inlet channel 81a, the flow channel 82b can connect the inlet channel 81a and the outlet channel 81b to form a liquid passage, and the inlet valve is in an open state.

[0036] In this embodiment, the axial rotary valve core 82 has sealing elements 85 on both sides of the flow channel 82b to maintain a seal between the axial rotary valve core 82 and the valve body 81. Specifically, the valve body 81 has a valve core mounting hole 81c in the middle, and the axial rotary valve core 82 is installed in the valve core mounting hole 81c. The axial rotary valve core 82 has a sealing element mounting part 82c, and the sealing element 85 is installed in the sealing element mounting part 82c. The sealing boss 82a has a countersunk hole in the middle, and a sealing body 84 is provided in the countersunk hole. The sealing body 84 is preferably an elastic annular sealing ring, which makes the inlet of the liquid valve more cost-effective while maintaining a good seal.

[0037] In this embodiment, the end of the axial rotary valve core 82 is provided with an axial limiting part 82d to prevent the axial movement of the axial rotary valve core 82 within the valve body 81, thus facilitating operation. A radial limiting part 82f is provided between the axial rotary valve core 82 and the valve body 81, allowing the axial rotary valve core 82 to rotate within a set range, thus facilitating operation.

[0038] In this embodiment, a rotary switch 83 is installed at the other end of the shaft-shaped rotary valve core 82 to drive its rotation. Specifically, the shaft-shaped rotary valve core 82 has a rotary switch mounting part 82e, and the rotary switch 83 is connected to the rotary switch mounting part 82e by a fastener 86.

[0039] The rotary switch 83 described in this embodiment has an indicator 83a on its outer side for indicating the rotation direction and opening degree, making it easy for the operator to identify and use. The rotary switch 83 has a rotating part 83b, including a rotating handle and / or a textured surface, for easy rotation.

[0040] In its initial state, the sealing boss 82a of the axial rotary valve core 82 coincides with the outlet of the liquid inlet channel 81a, thereby blocking the liquid inlet channel 81a and keeping the liquid inlet valve closed, thus achieving a good isolation between the spray gun and the inside of the liquid inlet valve and the outside air. During use, rotating the rotary switch 83 causes the sealing boss 82a to be misaligned with the outlet of the liquid inlet channel 81a, and the flow channel 82b connects the liquid inlet channel 81a and the liquid outlet channel 81b to form a liquid passage, putting the liquid inlet valve in the open state.

[0041] This invention utilizes a structural design in which a shaft-shaped rotating valve core extends laterally through the valve body, achieving a good isolation between the spray gun and the inside of the liquid inlet valve and the outside air. At the same time, it greatly reduces the requirements for machining accuracy, improves assembly efficiency, reduces manufacturing costs, and facilitates widespread application.

[0042] Example 2

[0043] The difference between this embodiment and Embodiment 1 is that a radial limiting part is provided between the rotary switch 83 and the valve body 81, so that the axial rotary valve core 82 can rotate within a set range, which facilitates operation.

[0044] The remaining structures and functions can be referred to in Embodiment 1.

[0045] Example 3

[0046] See Figure 11 This embodiment provides a spray gun, including a gun body 1 with a grip, a sealing device 5, a trigger 4, a barrel 6, a nozzle 7, a ejector pin device 3, and an ejector pin opening adjustment and locking device 2. The barrel 6 and the nozzle 7 are sequentially installed at the front end of the gun body 1. The trigger 4 is hinged to the middle of the gun body 1. The ejector pin device 3 is press-fitted into the gun body 1, the trigger 4, and the barrel 6 through the ejector pin opening adjustment and locking device 2, and is linked by the trigger 4. A polyurethane foam sealant inlet valve 8 with a shaft-shaped rotary valve core, as described in Embodiment 1 or Embodiment 2, is installed on the gun body 1.

[0047] This invention utilizes a structural design in which a shaft-shaped rotating valve core extends laterally through the valve body, achieving a good isolation between the spray gun and the inside of the liquid inlet valve and the outside air. At the same time, it greatly reduces the requirements for machining accuracy, improves assembly efficiency, reduces manufacturing costs, and facilitates widespread application.

Claims

1. A polyurethane sealant inlet valve with a shaft-shaped rotary valve core, comprising a valve body, wherein an inlet channel and an outlet channel are longitudinally arranged within the valve body, characterized in that: A shaft-shaped rotary valve core is installed through the middle of the valve body. The shaft-shaped rotary valve core has a sealing boss and a flow channel for foam to pass through in the middle. When the sealing boss coincides with the outlet of the liquid inlet channel, the liquid inlet valve is in the closed state. When the sealing boss is misaligned with the outlet of the liquid inlet channel, the flow channel can connect the liquid inlet channel and the liquid outlet channel to form a liquid passage channel, and the liquid inlet valve is in the open state.

2. A polyurethane sealant inlet valve with a shaft-shaped rotary valve core according to claim 1, characterized in that: The axial rotary valve core is provided with sealing elements on both sides of the flow channel to maintain the seal between the axial rotary valve core and the valve body.

3. A polyurethane sealant inlet valve with a shaft-shaped rotary valve core according to claim 1, characterized in that: The sealing boss has a countersunk hole in the middle, and a sealing body is provided in the countersunk hole.

4. A polyurethane sealant inlet valve with a shaft-shaped rotary valve core according to claim 1, characterized in that: The end of the axial rotary valve core is provided with an axial limiting part.

5. A polyurethane sealant inlet valve with a shaft-shaped rotary valve core according to claim 4, characterized in that: A radial limiting part is provided between the axial rotary valve core and the valve body.

6. A polyurethane sealant inlet valve with a shaft-shaped rotary valve core according to claim 1, characterized in that: A rotary switch is installed at the other end of the shaft-shaped rotary valve core to drive its rotation.

7. A polyurethane sealant inlet valve with a shaft-shaped rotary valve core according to claim 6, characterized in that: A radial limiting part is provided between the rotary switch and the valve body.

8. A polyurethane sealant inlet valve with a shaft-shaped rotary valve core according to claim 6, characterized in that: The outer side of the rotary switch is provided with indicators for the rotation direction and opening degree.

9. A polyurethane sealant inlet valve with a shaft-shaped rotary valve core according to claim 6, characterized in that: The rotary switch has a rotating part, including a rotating handle and / or a mesh pattern.

10. A spray gun, comprising a gun body with a grip, a sealing device, a trigger, a barrel, a nozzle, a ejector pin device, and an ejector pin opening adjustment and locking device, wherein the barrel and nozzle are sequentially installed at the front end of the gun body, the trigger is hinged to the middle of the gun body, and the ejector pin device is press-fitted into the gun body, trigger, and barrel via the ejector pin opening adjustment and locking device, and is linked by the trigger; characterized in that: The gun body is equipped with a polyurethane sealant inlet valve with a shaft-shaped rotary valve core as described in any one of claims 1-9.

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