Drip-proof filling valve

Abstract

The application discloses a drip-proof filling valve, which comprises a main valve body, an inner valve core arranged in a valve cavity and a leak-proof expansion interface clamped to a lower connecting interface. The main valve body is characterized in that a negative pressure channel is integrated in the side wall of the main valve body. When the piston rod of the inner valve core drives the opening and closing, the residual liquid in the negative pressure cavity is instantaneously sucked back to realize zero dripping. The leak-proof expansion interface is adapted to different containers through modular buckling. A food-grade filter screen is arranged in the leak-proof expansion interface to intercept particles. Symmetrical tank body limiting probes are arranged at the bottom of the leak-proof expansion interface to clamp and position the bottle opening. The valve completely eliminates the dripping problem of high-viscosity or particle-containing liquid filling, improves the sealing performance and equipment compatibility, and is especially suitable for food and medicine filling production lines.

Description

Technical Field

[0001] This utility model relates to the field of liquid filling equipment, specifically an anti-drip filling valve. Background Technology

[0002] A filling valve is an industrial valve that achieves precise quantitative filling of liquids through on / off control. It is mainly used in machinery and equipment in the food, packaging, petrochemical, and metallurgical industries. There are relatively few domestic manufacturers, and their products are known for their high speed, high precision, and stability. The filling valve is an on / off valve that precisely controls the flow rate. It is widely used in machinery in the food, packaging, petrochemical, metallurgical, painting, automotive, and printing and dyeing industries. Valve features include a lightweight and compact actuator with an attractive appearance and excellent performance.

[0003] Current filling valves suffer from the following problems during use: Traditional filling valves are prone to dripping due to liquid residue upon closing, contaminating equipment and packaging containers. Existing filling valves mainly employ spring-sealed structures, but these still suffer from short sealing time and poor adaptability. The dripping phenomenon is particularly pronounced with high-viscosity or particulate liquids. Therefore, a drip-proof filling valve is needed to solve these technical problems. Utility Model Content

[0004] This utility model addresses the problems existing in the prior art by providing an anti-drip filling valve. It includes: a main valve body, the upper part of which is connected to a filling device; an inner valve core is disposed inside the main valve body; and an anti-drip expansion interface is engaged at the lower output end of the inner valve core. The main valve body has a valve cavity inside, and a liquid passage interface is provided above the valve cavity. The upper end of the liquid passage interface is connected to the filling equipment. A negative pressure channel is provided outside the valve cavity. A module mounting slot is provided below the valve cavity. A lower connection interface is provided below the module mounting slot.

[0005] Preferably, the inner valve core is located inside the valve cavity, and a negative pressure chamber is provided inside the inner valve core. The negative pressure chamber is connected to the negative pressure channel. A piston rod is provided above the negative pressure chamber and is connected to the main valve body to drive the whole to move up and down. A support component is provided below the negative pressure chamber to support the position of the negative pressure chamber. A lower limit block is provided below the support component.

[0006] Preferably, a guide balance sleeve is coaxially fitted on the piston rod to improve axial stability.

[0007] Preferably, a sealing ring is provided between the support assembly and the negative pressure chamber.

[0008] Preferably, an outer protective wall is provided on the outer wall of the lower connection interface, the outer protective wall is provided with an anti-rust coating, and an expansion mounting buckle is engaged on the outer protective wall, and the lower connection interface is engaged with the leak-proof expansion interface through the expansion mounting buckle.

[0009] Preferably, the bottom of the lower connection interface is provided with a lower groove, and the edge of the lower groove is chamfered at 45°.

[0010] Preferably, the leak-proof expansion interface is provided with a limiting compression spring inside, which is engaged with the outer wall of the lower connection interface. The leak-proof expansion interface is provided with a filter screen inside, which is located below the lower connection interface. A tank limiting probe is located below the filter screen.

[0011] Preferably, the tank limiting probes are symmetrically arranged on the inner wall of the bottom of the leak-proof expansion interface to lock and limit the filling bottles.

[0012] Preferably, the filter screen is made of food-grade stainless steel.

[0013] Compared with the prior art, this utility model provides an anti-drip filling valve, which has the following beneficial effects: 1. During the filling process, when the internal cavity of the anti-drip filling valve is closed, the negative pressure chamber instantly draws back the residual liquid, thereby achieving zero leakage; at the same time, the anti-drip filling valve is equipped with an outer protective wall and a sealing ring, which can improve the sealing and corrosion resistance of the valve body. 2. The anti-drip filling valve is equipped with an external anti-leakage expansion interface at the bottom, which can limit and fix the bottle to be filled according to different filling needs. At the same time, the modular interface is compatible with different containers, thereby improving the compatibility of the filling valve. Attached Figure Description

[0014] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a structural schematic diagram of a specific embodiment of the present utility model; Figure 2 This is a schematic diagram of the main structure in a specific embodiment of the present utility model; Figure 3 This is a cross-sectional view of the main valve body AA of this utility model; Figure 4 This is a partially enlarged schematic diagram of point A in this utility model; Figure 5 This is a schematic diagram of the installation of the leak-proof expansion interface in a specific embodiment of this utility model.

[0015] In the diagram: 1. Main valve body; 2. Inner valve core; 3. Leak-proof expansion interface; 101. Valve cavity; 102. Liquid circuit interface; 103. Negative pressure channel; 104. Module mounting slot; 105. Lower connection interface; 201. Piston rod; 202. Guide balance sleeve; 203. Negative pressure chamber; 204. Support assembly; 205. Sealing ring; 206. Lower limit block; 301. Outer protective wall; 302. Expansion mounting buckle; 303. Lower groove; 401. Limit compression spring; 402. Filter screen; 403. Tank limit probe. Detailed Implementation

[0016] To more clearly illustrate the overall concept of this application, a detailed explanation is provided below with reference to the accompanying drawings.

[0017] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0018] Furthermore, it should be understood in the description of this application that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and are not intended to 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 the present invention.

[0019] In this application, unless otherwise expressly 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 part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0020] In this application, unless otherwise expressly specified and limited, the "above" or "below" of the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. In the description of this specification, references to terms such as "an embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

[0021] Example 1: This embodiment provides a drip-proof filling valve, the structure of which is as follows: Figure 1-5 As shown, it includes the following core components: The top of the main valve body 1 is connected to the filling equipment through the liquid interface 102, and a cylindrical valve chamber 101 is provided inside; The top of the valve chamber 101 is connected to the liquid interface 102 for inputting the liquid to be filled. The side wall integrates a negative pressure channel 103 for connecting an external vacuum pump. The bottom has a module mounting slot 104, and a lower connection interface 105 extends from below the slot. The lower connection interface 105 is covered with an outer protective wall 301, and the surface is sprayed with an anti-rust coating. The outer protective wall 301 is provided with an expansion mounting buckle 302 around its perimeter for locking the leak-proof expansion interface 3. The bottom is machined with a lower groove 303, and the edge of the groove is chamfered at 45° to reduce liquid residue during actual use.

[0022] The inner valve core 2 is coaxially installed in the valve cavity 101, including: a piston rod 201, which passes through the top of the valve cavity and is slidably and sealingly connected to the main valve body 1; a cylinder (not shown) is connected to the top end to drive up and down movement; a guide balance sleeve 202 is coaxially sleeved outside the piston rod 201 to enhance axial stability; a negative pressure chamber 203 is located at the lower part of the inner valve core and is connected to the negative pressure channel 103 through a side wall hole; a support assembly 204 is fixed to the bottom of the negative pressure chamber 203 and achieves dynamic sealing through a sealing ring 205; its lower end is connected to a lower limit block 206 to limit the downward movement of the inner valve core.

[0023] The leak-proof expansion interface 3 is connected to the lower connection interface 105 by an expansion mounting buckle 302. It includes a limiting compression spring 401, the upper end of which is engaged with the outer wall of the lower connection interface 105 to provide elastic pre-tightening force. The filter screen 402 is made of food-grade stainless steel mesh and is installed at an angle inside the interface, located directly below the outlet of the lower connection interface 105. It can intercept particulate impurities during the filling process. Two symmetrically arranged tank limiting probes 403 are set on the inner wall of the bottom of the interface to hold the bottle mouth to be filled.

[0024] The actual working process of this filling valve is as follows: 1. The staff prepares for the filling task by clamping the can limit probe 403 of the leak-proof expansion interface 3 to the bottle mouth, and pushing the piston rod 201 down the inner valve core 2 to open the bottom channel of the valve chamber 101.

[0025] 2. The staff fills the liquid inside the tank. The liquid enters the valve chamber 101 through the liquid line interface 102 and is injected into the container through the lower connection interface 105 and the filter screen 402.

[0026] 3. After filling is completed, the staff will close the anti-drip valve, and the piston rod 201 will be lifted to close the valve chamber 101. At the same time, the negative pressure channel 103 will instantly draw the residual liquid at the lower end of the valve chamber to the negative pressure chamber 203 to achieve zero dripping.

[0027] 4. For different filling tasks, the filling valve adopts modular adaptation, and different specifications of leak-proof expansion interface 3 can be replaced according to different needs, which can be adapted to containers with bottle mouth diameter of 30-80mm.

[0028] For any parts not mentioned in this application, existing technologies may be used or referenced.

[0029] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0030] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A drip-proof filling valve, characterized in that, include: The main valve body is connected to the filling equipment at its upper position. An inner valve core is provided inside the main valve body, and a leak-proof expansion interface is engaged at the output end position below the inner valve core. The main valve body has a valve cavity inside, and a liquid passage interface is provided above the valve cavity. The upper end of the liquid passage interface is connected to the filling equipment. A negative pressure channel is provided outside the valve cavity. A module mounting slot is provided below the valve cavity. A lower connection interface is provided below the module mounting slot.

2. The filling valve according to claim 1, characterized in that, The inner valve core is located inside the valve cavity, and a negative pressure chamber is provided inside the inner valve core. The negative pressure chamber is connected to the negative pressure channel. A piston rod is provided above the negative pressure chamber and is connected to the main valve body to drive the whole to move up and down. A support component is provided below the negative pressure chamber to support the position of the negative pressure chamber. A lower limit block is provided below the support component.

3. The filling valve according to claim 2, characterized in that, A guide balance sleeve is coaxially fitted on the piston rod to improve axial stability.

4. The filling valve according to claim 2, characterized in that, A sealing ring is provided between the support component and the negative pressure chamber.

5. The filling valve according to claim 1, characterized in that, An outer protective wall is provided on the outer wall of the lower connection interface. The outer protective wall is provided with an anti-rust coating. An expansion mounting buckle is engaged on the outer protective wall. The lower connection interface is engaged with the leak-proof expansion interface through the expansion mounting buckle.

6. The filling valve according to claim 5, characterized in that, The bottom of the lower connection interface is provided with a lower groove, and the edge of the lower groove is chamfered at 45°.

7. The filling valve according to claim 1, characterized in that, The leak-proof expansion interface is equipped with a limiting compression spring inside, which engages with the outer wall of the lower connection interface. The leak-proof expansion interface is equipped with a filter screen inside, which is located below the lower connection interface. A tank limiting probe is located below the filter screen.

8. The filling valve according to claim 7, characterized in that, The tank limiting probes are symmetrically positioned on the inner wall of the bottom of the leak-proof expansion interface to lock and limit the filling of external bottles.

9. The filling valve according to claim 7, characterized in that, The filter screen is made of food-grade stainless steel.

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