Spray valve assembly and pressure container applying same

Abstract

The utility model relates to a spray valve assembly and a pressure vessel applying the spray valve assembly, the spray valve assembly comprises a spray valve and a button arranged at the top of a valve rod of the spray valve, the valve rod and the button are respectively provided with a first channel and a second channel which are connected, and a pressure control valve is arranged in an outlet of the second channel; when the spray valve is pressed downwards by the valve rod button to be opened and the valve rod sprays out high-pressure fluid, the pressure control valve is also opened; when the high-pressure fluid is cut off, the pressure control valve is closed to prevent residual fluid in the first channel and the second channel from flowing out. And therefore, the environmental safety is prevented from being influenced by overflowing of the residual liquid or gas.

Description

Technical Field

[0001] The utility model relates to a spray valve assembly and a pressure container using the spray valve assembly. Background Art

[0002] Chinese patent document CN109225711A discloses a spray valve comprising a valve body and a sealing cup located at the top of the valve body. The lower end surface of the sealing cup is provided with a downwardly opening mounting groove. An annular protrusion on the outer periphery of the valve body top is placed in the mounting groove. A mold is used to apply pressure to the mounting groove, causing the lower end of the mounting groove to curl inward and wrap around the annular protrusion, thereby pressing the top of the valve body into the mounting groove. The valve body and sealing cup are pressed together by the mold to achieve fixation. During use, when there is no external downward pressure on the valve stem, the spring acts to seal the upper end opening of the valve stem cap, sealing the upper end opening of the valve stem cap. The sealing ring and the valve stem seal, sealing the upper end opening, and the sealing ring and the valve stem seal, causing the spray valve to be in a closed state. When external downward pressure is applied to the valve stem, the sealing ring and the upper end opening of the valve stem cap are relatively separated, and the spray valve is in an open state. If at this time, the spray valve is assembled in the liquid storage bag, the liquid storage bag is assembled in the pressure container, the liquid storage bag is filled with liquid, and the pressure container is filled with high-pressure gas, then the liquid in the liquid storage bag enters the inner cavity of the valve body under the action of the high-pressure gas, and then passes through the gap between the sealing ring and the upper end opening of the valve stem cap into the groove at the top of the valve stem cap, and then passes through the air hole on the valve stem, enters the valve stem, and finally is sprayed out from the top opening of the valve stem.

[0003] A shortcoming of the prior art is that, when the spray valve is in use, a button is installed on the valve stem. To activate spraying, the button must be pressed, causing the valve stem to move downward. When the button is released, the valve stem returns to its original position, ending spraying. During this time, residual liquid remains in the air passage between the valve stem and the button. This residual liquid can slowly overflow from the button, potentially impacting environmental safety. A spray valve assembly that prevents residual liquid from overflowing from the button after use is a technical problem to be solved in this field. Utility Model Content

[0004] The first technical problem to be solved by the utility model is to provide a spray valve assembly and a pressure container using the spray valve assembly, wherein the spray valve assembly is used to prevent residual fluid at a button from overflowing after the spray valve spray operation is completed.

[0005] In order to solve the above-mentioned primary technical problem, the present invention provides a spray valve assembly, comprising: a spray valve and a button provided on the top of the valve stem of the spray valve, the valve stem and the button respectively having first and second connected passages, and a pressure-controlled valve provided in the outlet end of the second passage; when the valve stem of the spray valve is pressed downward by the button and opened, the valve stem sprays high-pressure fluid, and the pressure-controlled valve is also opened; when the high-pressure fluid is cut off, the pressure-controlled valve is closed.

[0006] As a preference: the pressure control valve comprises a shell fixed to the inner wall of the outlet end of the second channel, an inner core arranged in the shell and a ejector pin arranged in the inner core; the front end of the inner core is in sliding engagement with the front port of the shell, the rear end of the inner core is in sliding and sealing engagement with the inner wall of the shell, a spring is provided between the inner wall of the shell and the inner core, the rear end of the ejector pin is fixedly connected to the inner wall or the rear end of the shell, and the front end of the ejector pin extends into the channel of the inner core; a truncated cone-shaped convex surface is provided adjacent to the front end of the ejector pin, and a truncated cone-shaped concave surface is provided adjacent to the front end of the channel of the inner core for sealing engagement with the convex surface; in a natural state, the pressure of the spring causes the convex surface to seal engagement with the concave surface, The pressure-controlled valve is closed; when the spray valve is opened by pressing the button and the valve stem sprays high-pressure fluid, the high-pressure fluid enters the shell, and the high-pressure fluid overcomes the pressure of the spring, causing the inner core to move forward, thereby causing the convex surface and the concave surface to separate, the pressure-controlled valve is opened, and the high-pressure fluid is sprayed out from the front end of the channel of the inner core; when the button is released, the spray valve is closed, the high-pressure fluid loses pressure instantly, the pressure of the spring causes the inner core to move backward, and the convex surface and the concave surface to re-seal, and the front end of the ejector pin reaches the front end of the channel of the inner core, and discharges the fluid in the front end of the channel of the inner core, and the pressure-controlled valve is closed to prevent the residual fluid in the button from flowing out.

[0007] As a further preference: the outer shell is cylindrical, the inner wall of the front port of the outer shell is provided with a protrusion, the outer wall of the rear end of the inner core is provided with a radially extending protrusion, the spring is sleeved on the outer wall of the inner core and fits between the protrusion and the protrusion; the outer wall of the protrusion is provided with an annular groove, and a sealing ring is provided in the annular groove, and the rear end of the inner core is slidingly and sealingly fitted with the inner wall of the outer shell through the sealing ring.

[0008] As a further preference, a space within the housing between the rear end of the inner core and the rear end of the ejector pin is communicated with an inlet end of the second channel.

[0009] As a further priority: the outlet port of the second channel is flush with the front end port of the channel of the inner core; when the pressure-controlled valve is closed, the front end face of the ejector pin is flush with the front end port of the channel of the inner core to completely remove the residual fluid, thereby preventing the residual liquid from overflowing during subsequent storage and transportation and affecting environmental safety.

[0010] A pressure vessel using the above-mentioned spray valve assembly, wherein the spray valve is assembled on the bag opening of a liquid storage bag, the liquid storage bag is assembled in the pressure vessel, and the sealing cup of the spray valve is sealed and fitted on the top opening of the pressure vessel.

[0011] A method for operating the spray valve assembly includes: in a natural state, the pressure of the spring causes the convex surface and the concave surface to seal and fit together, and the pressure-controlled valve is closed; when the spray valve is opened by pressing the button downward, the valve stem sprays high-pressure fluid, and the high-pressure fluid enters the housing, and the high-pressure fluid overcomes the pressure of the spring, causing the inner core to move forward, thereby causing the convex surface to separate from the concave surface, and the high-pressure fluid to spray out from the front end of the inner core, and the pressure-controlled valve is opened; when the button is released, the spray valve is closed, and the high-pressure fluid loses pressure instantly, the pressure of the spring causes the inner core to move backward, and the convex surface and the concave surface to seal and fit together again, and the front end of the ejector pin reaches the front end of the channel of the inner core, and discharges the fluid in the front end of the channel of the inner core, and the pressure-controlled valve is closed to prevent residual liquid in the button from flowing out.

[0012] The present invention has positive effects compared to the prior art: (1) When the spray valve assembly of the present invention is in operation, when the valve stem of the spray valve is opened by pressing the button, the pressure-controlled valve is also opened; when the high-pressure fluid is cut off, the pressure-controlled valve is closed to prevent the residual liquid in the first and second channels from flowing out. This prevents the residual liquid from overflowing and affecting environmental safety. (2) The pressure required to open the pressure-controlled valve of the present invention is adjusted accordingly according to the pressure of the pressure vessel used by the spray valve assembly, that is, the pressure of the spring used corresponds to the pressure of the pressure vessel, to ensure that the pressure vessel can be opened in time after the button is pressed, and can be closed in time when the button is released. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to make the content of the utility model easier to understand, the utility model is further described in detail below based on specific embodiments and in conjunction with the accompanying drawings, wherein

[0014] Figure 1 Schematic diagram of the cross-sectional structure of the pressure control valve in the spray valve assembly in Example 1;

[0015] Figure 2A schematic diagram of the structure of the spray valve assembly assembled on a pressure vessel;

[0016] Figure 3 for Figure 1 Structural diagram of the pressure control valve when it is open;

[0017] Figure 4 for Figure 1 Schematic diagram of the structure of the pressure control valve when it is closed. DETAILED DESCRIPTION Example

[0018] like Figure 1-4 The spray valve assembly of this embodiment includes a spray valve 10 and a button 20 located at the top of the valve stem of the spray valve 10. The valve stem and button 20 respectively have first and second connected passages. A pressure-controlled valve 30 is located in the outlet of the second passage. When the valve stem of the spray valve 10 is opened by being pressed downward by the button and the valve stem sprays a high-pressure fluid, the pressure-controlled valve is also opened. When the high-pressure fluid is cut off, the pressure-controlled valve closes. The high-pressure fluid can be gas, liquid, or a gas-liquid mixture.

[0019] The pressure control valve 30 includes a shell 1 fixed to the inner wall of the outlet of the second channel, an inner core 3 provided in the shell 1 and a ejector pin 2 provided in the inner core 3; the front end of the inner core 3 is in sliding cooperation with the front port of the shell 1, and the rear end of the inner core 3 is in sliding and sealing cooperation with the inner wall of the shell 1, a spring 4 is provided between the inner wall of the shell 1 and the inner core 3, the rear end of the ejector pin 2 is fixedly connected to the inner wall or the rear end of the shell 1, and the front end of the ejector pin 2 extends into the channel of the inner core 3; a truncated cone-shaped convex surface is provided adjacent to the front end of the ejector pin 2, and a truncated cone-shaped concave surface is provided adjacent to the front end of the channel of the inner core 3 for sealing cooperation with the convex surface; in a natural state, the pressure of the spring causes the convex surface to seal with the concave surface, and the The pressure-controlled valve is closed; when the valve stem of the spray valve 10 is pressed down by the button 20 and opened, the valve stem sprays high-pressure fluid, and the high-pressure fluid enters the shell 1. The high-pressure fluid overcomes the pressure of the spring 4, causing the inner core 3 to move forward, thereby causing the convex surface and the concave surface to separate, and the pressure-controlled valve 10 is opened, and the high-pressure fluid is sprayed out from the front end of the channel of the inner core 3; when the button is released, the spray valve is closed, the high-pressure fluid loses pressure instantly, and the pressure of the spring causes the inner core to move backward, so that the convex surface and the concave surface are sealed again, and the front end of the ejector pin reaches the front end of the channel of the inner core, and the fluid in the front end of the channel of the inner core is discharged, and the pressure-controlled valve is closed to prevent the residual liquid in the first and second channels from flowing out.

[0020] The outer shell 1 is cylindrical in shape, and the inner wall of the front port of the outer shell 1 is provided with a protrusion (which can be a plurality of non-continuous annularly distributed protrusions or an annular protrusion), and the outer wall of the rear end of the inner core 3 is provided with a radially extending protrusion (preferably an annular protrusion). The spring 4 is sleeved on the outer wall of the inner core 3 and fits between the protrusion and the protrusion; the outer wall of the protrusion is provided with an annular groove, and a sealing ring 5 is provided in the annular groove. The rear end of the inner core 3 is slidably and sealedly fitted with the inner wall of the outer shell 1 through the sealing ring 5.

[0021] The space in the housing 1 between the rear end of the inner core 3 and the rear end of the ejector pin 1 is communicated with the inlet end of the second channel.

[0022] The outlet port of the second channel is flush with the front end port of the channel of the inner core; when the pressure-controlled valve is closed, the front end surface of the ejector pin is flush with the front end port of the channel of the inner core to completely remove the residual fluid, thereby preventing the residual liquid from overflowing during subsequent storage and transportation and affecting environmental safety.

[0023] The structural principle of the spray valve 10 is detailed in Chinese patent documents CN109225711A, CN109225711A, CN2885770Y, CN103803185A, CN101337614A, CN201249913Y, CN204380902U, CN104806789A, CN104801453A, etc.

[0024] A pressure vessel 40 using the above-mentioned spray valve assembly, wherein the spray valve is assembled on the bag opening of a liquid storage bag 50, the liquid storage bag is assembled in the pressure vessel, and the sealing cup of the spray valve is sealed and fitted on the top opening of the pressure vessel. Example

[0025] An operating method of the spray valve assembly of the above-mentioned embodiment 1 includes: in a natural state, the pressure of the spring causes the convex surface and the concave surface to seal, and the pressure-controlled valve is closed; when the spray valve is opened by pressing the button downward, the valve stem sprays high-pressure fluid, and the high-pressure fluid enters the housing. The high-pressure fluid overcomes the pressure of the spring, causing the inner core to move forward, thereby separating the convex surface from the concave surface, and the high-pressure fluid is sprayed from the front end of the channel of the inner core, and the pressure-controlled valve is opened; when the button is released, the spray valve is closed, and the high-pressure fluid loses pressure instantly. The pressure of the spring causes the inner core to move backward, causing the convex surface and the concave surface to re-establish a sealing fit, and the front end of the ejector pin reaches the front end of the channel of the inner core, thereby discharging the fluid in the front end of the channel of the inner core, and the pressure-controlled valve is closed to prevent residual fluid in the first and second channels from flowing out, thereby preventing fluid from gradually overflowing during transportation or storage from contaminating the environment.

[0026] Obviously, the above embodiments are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. Those skilled in the art will readily appreciate that other variations or modifications based on the above description are possible. It is not necessary and impossible to enumerate all embodiments here. However, obvious variations or modifications arising from the spirit of the present invention remain within the scope of protection of the present invention.

Claims

1. A spray valve assembly, comprising: A spray valve and a button provided on the top of the valve stem of the spray valve, wherein the valve stem and the button respectively have a first channel and a second channel connected thereto, wherein the outlet end of the second channel is provided with a pressure-controlled valve; When the valve stem of the spray valve is opened by being pressed down by a button and the valve stem sprays high-pressure fluid, the pressure-controlled valve is also opened; when the high-pressure fluid is cut off, the pressure-controlled valve is closed.

2. The spray valve assembly according to claim 1, characterized in that: The pressure control valve includes a shell fixed to the inner wall of the outlet end of the second channel, an inner core arranged in the shell, and a ejector pin arranged in the inner core; The front end of the inner core is in sliding engagement with the front port of the outer shell, the rear end of the inner core is in sliding and sealing engagement with the inner wall of the outer shell, a spring is provided between the inner wall of the outer shell and the inner core, the rear end of the ejector pin is fixedly connected to the inner wall or the rear end of the outer shell, and the front end of the ejector pin extends into the channel of the inner core; The front end adjacent to the ejector pin has a truncated cone-shaped convex surface, and the front end inner wall of the channel adjacent to the inner core has a truncated cone-shaped concave surface for sealing with the convex surface; In a natural state, the pressure of the spring causes the convex surface to seal with the concave surface, and the pressure-controlled valve is closed; When the spray valve is opened by pressing the button, the valve stem sprays high-pressure fluid, and the high-pressure fluid enters the housing. The high-pressure fluid overcomes the pressure of the spring, causing the inner core to move forward, thereby causing the convex surface to separate from the concave surface, and the pressure-controlled valve is opened, and the high-pressure fluid is sprayed out from the front end of the channel of the inner core; When the button is released, the spray valve is closed, the high-pressure fluid loses pressure instantly, and the pressure of the spring causes the inner core to move backward, so that the convex surface and the concave surface are sealed again, and the front end of the ejector pin reaches the front end of the channel of the inner core, and the fluid in the front end of the channel of the inner core is discharged, and the pressure-controlled valve is closed.

3. The spray valve assembly according to claim 2, characterized in that: The outer shell is cylindrical in shape, and a protrusion is provided on the inner wall of the front port of the outer shell. A radially extending protrusion is provided on the outer wall of the rear end of the inner core. The spring is sleeved on the outer wall of the inner core and fits between the protrusion and the protrusion; an annular groove is provided on the outer wall of the protrusion, and a sealing ring is provided in the annular groove. The rear end of the inner core is slidingly and sealingly fitted with the inner wall of the outer shell through the sealing ring.

4. The spray valve assembly according to claim 2, wherein: The space in the shell between the rear end of the inner core and the rear end of the ejector pin is communicated with the inlet end of the second channel.

5. The spray valve assembly according to claim 2, wherein: The outlet port of the second channel is flush with the front end port of the channel of the inner core; when the pressure control valve is closed, the front end surface of the ejector pin is flush with the front end port of the channel of the inner core.

6. A pressure vessel using the spray valve assembly according to claim 1, characterized in that: The spray valve is assembled on the bag opening of the liquid storage bag, the liquid storage bag is assembled in the pressure container, and the sealing cup of the spray valve is sealed and matched on the top opening of the pressure container.

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