A liquid adding gun valve core assembly

Abstract

The utility model discloses a kind of liquid adding gun valve core assemblies, including valve core, liquid outlet connector and liquid pipeline, the liquid outlet connector is connected with the liquid pipeline, the end of liquid outlet connector has the extension protection section in the liquid pipeline, the valve core includes sealing section and driving section, the sealing section is installed in the extension protection section, the driving section is installed the liquid pipeline by spring and spring seat, the outer wall of the extension protection section and the inner wall of the liquid pipeline have gap, the liquid guide hole that is communicated with the gap is opened on this extension protection section, the liquid guide hole and the gap constitute liquid flow channel;The utility model is improved by valve core and liquid outlet connector, form new liquid flow channel, protect valve core by extension protection section, and liquid is guided by liquid guide hole, liquid is guided from the upper portion of valve core and flows, reduce the influence of liquid to the reset of valve core.

Description

Technical Field

[0001] This utility model relates to a high-pressure liquid dispensing gun, specifically a dispensing gun valve core assembly. Background Technology

[0002] During the early stages of technology research and development, the applicant conducted in-depth research on the structural optimization and functional realization of the liquid dispensing gun, and successively proposed a number of related patent technologies. For example, in patent application number 2023236045226 entitled "A Pneumatic Liquid Dispensing Gun" (hereinafter referred to as "Patent 1") and patent application number 2023236043432 entitled "An LNG Angle-Type Pneumatic Liquid Dispensing Gun" (hereinafter referred to as "Patent 2"), both patents effectively achieved a stable connection between the liquid dispensing gun and the dispensing head through innovative structural design, while also achieving effective control over the on / off of high-pressure liquid, providing a feasible technical solution for high-pressure liquid dispensing operations.

[0003] However, in practical applications, it has been found that the liquid flow path of the dispensing gun disclosed in Patents 1 and 2 still has room for improvement. Specifically, during operation, the high-pressure liquid flows through the middle region 810 of the conventional valve core 800 (as shown in Figure 1 and 2). Figure 2 The flow path (referring to the cavity area in section 810) then flows to the sealing lip and finally enters the device being dispensed through the connector. This flow path design is prone to valve core reset problems during nozzle retraction or venting: because some gas or liquid remains in the middle area (cavity area) of the valve core, this residual gas or liquid generates a certain thrust during nozzle retraction or venting. This thrust interferes with the normal reset of the valve core, causing it to fail to accurately reset to the preset position, resulting in poor valve core contact. Therefore, it is urgent to optimize and improve the existing valve core assembly structure to solve the problem of poor valve core reset. Utility Model Content

[0004] Therefore, in order to solve the above-mentioned shortcomings, this utility model provides a liquid dispensing gun valve core assembly. By improving the valve core and the liquid outlet connector, a new liquid flow channel is formed. The valve core is protected by an extended protective section, and the liquid is guided through the liquid guide hole, so that the liquid flows from the upper part of the valve core, reducing the impact of the liquid on the valve core's reset.

[0005] Specifically, a liquid dispensing gun valve core assembly includes a valve core, a liquid outlet connector, and a liquid pipeline. The liquid outlet connector is connected to the liquid pipeline, and one end of the liquid outlet connector has an extended protective section located inside the liquid pipeline. The valve core includes a sealing section and a driving section. The sealing section is installed on the extended protective section, and the driving section is installed on the liquid pipeline via a spring and a spring seat. The outer wall of the extended protective section has a gap with the inner wall of the liquid pipeline. A liquid guide hole communicating with the gap is opened on the extended protective section. The liquid guide hole and the gap form a liquid flow channel. When the sealing section contacts the sealing lip opened on the liquid outlet connector, the liquid guide hole is closed, and the liquid flow channel is blocked. When the sealing section separates from the sealing lip, the liquid guide hole is unobstructed, and the liquid flow channel is unobstructed.

[0006] Optionally, the outlet connector is threaded to the liquid pipeline, and an energy storage sealing ring is installed on the end face of the threaded connection.

[0007] Optionally, the sealing section is equipped with a sealing ring that fits against the inner wall of the extended protective section.

[0008] Optionally, there are multiple liquid guiding holes, which are evenly arranged circumferentially in the extended protective section.

[0009] Optionally, the spring seat has several circumferential through holes.

[0010] Optionally, a shoulder for mounting the spring seat is provided inside the liquid pipe.

[0011] This utility model has the following advantages: This utility model relates to a liquid dispensing gun valve core assembly. By improving the valve core and outlet connector, a new liquid flow channel is formed. Compared to the flow channel design of patents 1 and 2 in the background art, which involves "liquid flowing through the central cavity area of ​​the valve core to the sealing lip," this utility model optimizes the liquid flow channel structure, adjusting the flow channel from "the central cavity area of ​​the valve core" to "the gap between the outer wall of the extended protective section and the inner wall of the liquid pipe + the guide hole on the extended protective section." The extended protective section protects the middle part of the valve core, reducing the impact of the liquid on the valve body. After the improvement, the liquid no longer needs to pass through the central area of ​​the valve core but is directly delivered to the outlet through the flow channel formed by the gap and the guide hole. When the sealing section contacts / separates from the sealing lip, the flow channel is blocked / unblocked only by the closure / opening of the guide hole. This fundamentally avoids the problem of residual gas or liquid in the middle area of ​​the valve core generating thrust, completely eliminates the hidden danger of thrust interfering with valve core reset when retracting the gun or venting, ensures that the valve core can be accurately reset to the preset position, effectively solves the problem of poor valve core contact, and thus ensures the accuracy of the liquid filling gun in controlling the liquid flow, reducing the safety risks such as sealing failure and media leakage caused by poor valve core reset. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the valve core structure in Patents 1 and 2 described in the background art (liquid-facing side state). Figure 2 These are schematic diagrams of the liquid flow channels in Patents 1 and 2 described in the background section; Figure 3 This is an assembly diagram of the liquid dispensing gun valve core assembly described in this utility model; Figure 4 This is a structural schematic diagram of the valve core and outlet connector of the present invention in their installation state; Figure 5 This is a schematic diagram of the liquid outlet connector described in this utility model; Figure 6 This is a schematic diagram of the outlet connector of this utility model from another perspective; Figure 7 This is a schematic diagram of the valve core described in this utility model; In the diagram: 100, liquid outlet connector; 110, extended protective section; 111, liquid guide hole; 200, liquid pipeline; 300, valve core; 310, sealing section; 320, drive section; 400, spring; 500, spring seat; 600, energy storage sealing ring; 700, sealing ring; 800, conventional valve core; 810, intermediate area. Detailed Implementation

[0013] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0014] In this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, without necessarily requiring or implying any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0015] As described in the background section, there is still room for improvement in the liquid flow path of the dispensing guns disclosed in Patents 1 and 2. Specifically, during operation, the high-pressure liquid flows through the middle region 810 of the conventional valve core 800 (as shown in Figure 1 and...). Figure 2The flow path (referring to the cavity area in section 810) then flows to the sealing lip and finally enters the device being dispensed through the connector. This flow path design is prone to valve core reset problems during nozzle retraction or venting: because some gas or liquid remains in the middle area (cavity area) of the valve core, this residual gas or liquid generates a certain thrust during nozzle retraction or venting. This thrust interferes with the normal reset of the valve core, causing it to fail to accurately reset to the preset position, resulting in poor valve core contact. Therefore, it is urgent to optimize and improve the existing valve core assembly structure to solve the problem of poor valve core reset.

[0016] Based on the above problems, this embodiment provides a liquid dispensing gun valve core assembly, including a valve core 300, a liquid outlet connector 100, and a liquid pipeline 200. The liquid outlet connector 100 is connected to the liquid pipeline 200, and one end of the liquid outlet connector has an extended protective section 110 located inside the liquid pipeline. The valve core 300 includes a sealing section 310 and a driving section 320. The sealing section 310 is installed on the extended protective section 110, and the driving section is installed on the liquid pipeline 200 through a spring 400 and a spring seat 500. The outer wall of the extended protective section 110 has a gap with the inner wall of the liquid pipeline. A liquid guide hole 111 communicating with the gap is opened on the extended protective section. The liquid guide hole 111 and the gap form a liquid flow channel. When the sealing section contacts the sealing lip opened on the liquid outlet connector, the liquid guide hole is closed, and the liquid flow channel is blocked. When the sealing section separates from the sealing lip, the liquid guide hole is unobstructed, and the liquid flow channel is in a smooth state.

[0017] The aforementioned technical features, through improvements to the valve core assembly, adjust the liquid flow channel from the "central cavity area of ​​the valve core" to "the gap between the outer wall of the extension section and the inner wall of the liquid pipeline + the guide hole on the extension section." By extending the protective section to protect the central area of ​​the valve core, the impact of liquid on the valve body is reduced. After the improvement, the liquid no longer needs to pass through the central area of ​​the valve core, but is directly delivered to the outlet through the flow channel formed by the gap and the guide hole. When the sealing section contacts / separates from the sealing lip, the flow channel is blocked / unblocked only by the closure / opening of the guide hole. This fundamentally avoids the problem of residual gas or liquid in the central area of ​​the valve core generating thrust, completely eliminating the hidden danger of thrust interfering with valve core reset during gun retraction or venting, ensuring that the valve core can accurately reset to the preset position, effectively solving the problem of poor valve core contact, thereby ensuring the accuracy of the liquid dispensing gun's control over liquid flow, reducing safety risks such as seal failure and media leakage caused by poor valve core reset, and improving the stability of the high-pressure liquid dispensing process.

[0018] To facilitate the sealing and maintenance of the outlet connector and the liquid pipeline, in one embodiment, the outlet connector 100 is threadedly connected to the liquid pipeline, and an energy storage sealing ring 600 is installed on the end face of the threaded connection. This sealing method allows for easy installation and removal of the sealing ring, facilitating maintenance.

[0019] To prevent liquid from flowing between the sealing section and the extension section, in one embodiment, the sealing section is equipped with a sealing ring that fits against the inner wall of the extension protection section. Optionally, two sealing rings 700 (O-rings can be selected) are installed on the sealing section. This sealing method also facilitates installation and disassembly.

[0020] To facilitate better liquid entry into the flow channel, in one embodiment, multiple liquid guiding holes 111 are evenly arranged circumferentially within the extended protective section. This technical feature improves liquid flowability and ensures more uniform stress distribution at the outlet connector.

[0021] To reduce the impact of the spring seat on the liquid flow capacity, in one embodiment, the spring seat 500 has several circumferentially penetrating through holes (such as...). Figure 3 (As shown). Several through holes ensure the flow of liquid, and their uniform circumferential arrangement prevents uneven force on the spring seat. Additionally, a shoulder is provided inside the liquid pipe for mounting the spring seat to limit its movement.

[0022] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A liquid dispensing gun valve core assembly, characterized in that: The device includes a valve core, a liquid outlet connector, and a liquid pipeline. The liquid outlet connector is connected to the liquid pipeline, and one end of the liquid outlet connector has an extended protective section located inside the liquid pipeline. The valve core includes a sealing section and a driving section. The sealing section is installed on the extended protective section, and the driving section is installed on the liquid pipeline via a spring and a spring seat. The outer wall of the extended protective section has a gap with the inner wall of the liquid pipeline, and a liquid guide hole communicating with the gap is opened on the extended protective section. The liquid guide hole and the gap form a liquid flow channel.

2. The liquid dispensing gun valve core assembly according to claim 1, characterized in that: The outlet connector is connected to the liquid pipeline by a thread, and an energy storage sealing ring is installed on the end face of the threaded connection.

3. The liquid dispensing gun valve core assembly according to claim 1, characterized in that: The sealing section is equipped with a sealing ring that fits against the inner wall of the extended protective section.

4. The liquid dispensing gun valve core assembly according to claim 1, characterized in that: The liquid guiding holes are multiple and are evenly arranged circumferentially in the extended protective section.

5. The liquid dispensing gun valve core assembly according to claim 1, characterized in that: The spring seat has several circumferential through holes.

6. A liquid dispensing gun valve core assembly according to claim 1 or 5, characterized in that: The liquid pipe has a shoulder for mounting the spring seat.

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