A valve with a top rod

Abstract

The utility model provides a kind of ejector rod valve, including shell and the valve core and spring inside shell, the shell includes fixedly connected upper shell and lower shell, the valve core includes the ball head for plugging the liquid inlet of upper shell and valve rod, the valve rod is installed in the center of the rear wall of ball head, the outer periphery of the valve rod is equipped with the spring, the rear wall of ball head and the inner wall of lower shell abut one end of the spring, the other end, the inside of the upper shell is provided with first limiting strip, the first limiting strip and the lateral wall of ball head abut;The inside of the lower shell is formed with second limiting strip, the second limiting strip and the lateral wall of valve rod abut, the first limiting strip and second limiting strip are used to limit the movement trajectory of the valve core.The utility model integrates ball head and valve rod, simplifies structure, saves component cost;And be provided with the limiting strip of abutting valve core lateral wall, so that valve core moves more stably, increases stability.

Description

Technical Field

[0001] This utility model relates to the field of push rod valve technology, specifically a push rod valve. Background Technology

[0002] Spring-loaded check valves are fundamental components commonly used in fluid control systems. Their sealing performance directly affects the operational stability and reliability of the entire system. Currently, the mainstream internal sealing structures in the industry are mainly divided into three categories: spring-ball structure, spring and plug structure, and spring push rod structure. All three sealing methods use a spring to provide preload force, ensuring the sealing component fits snugly against the valve seat to achieve the sealing function. They are widely used in various fluid transmission scenarios such as hydraulics, pneumatics, and water supply and drainage.

[0003] However, existing sealing structures still have significant technical defects: in the spring-ball structure and the spring-plug structure, there is a lack of effective limiting mechanism between the ball, plug and spring. During fluid impact, equipment vibration or long-term use, the sealing components are prone to radial sway, which leads to a decrease in the sealing surface fit accuracy, and then problems such as leakage and sealing failure, affecting the normal operation of the system. While the spring push rod structure can achieve stable sealing through the guiding action of the push rod, it requires a special guiding mechanism and assembly structure inside, which increases the overall structural complexity, processing difficulty and manufacturing cost significantly, making it difficult to meet the application requirements of low cost and high reliability. Utility Model Content

[0004] To address the aforementioned technical problems, this utility model provides a push-rod valve that integrates the ball head and valve stem, simplifying the structure and saving component costs; furthermore, it provides a limiting brace that abuts against the side wall of the valve core, allowing the valve core to move more smoothly along the radial direction of the valve body, thus increasing stability.

[0005] To achieve its technical objectives, this utility model adopts the following technical solution:

[0006] A push-rod valve includes a housing and a valve core and a spring installed inside the housing. The housing includes an upper housing and a lower housing fixedly connected. The valve core includes a ball head for blocking the inlet of the upper housing and a valve stem. The valve stem is installed at the center of the rear wall of the ball head. The spring is sleeved around the outer periphery of the valve stem. One end of the spring abuts against the rear wall of the ball head, and the other end abuts against the inner wall of the lower housing. A first limiting bar is provided inside the upper housing, abutting against the side wall of the ball head. A second limiting bar is formed inside the lower housing, abutting against the side wall of the valve stem. The first and second limiting bars are used to restrict the movement trajectory of the valve core.

[0007] Preferably, the outer diameter of the front end of the ball head is smaller than the outer diameter of the rear end, and the outer diameter of the rear end of the ball head is larger than the outer diameter of the valve stem.

[0008] Preferably, the ball head and the valve stem are integrally formed and both are made of rubber.

[0009] Preferably, a retaining ring is formed at the rear end of the upper housing, and a retaining groove is provided on the edge of the lower housing. The retaining ring is fixedly engaged in the retaining groove, and the upper housing and the lower housing are fixedly connected by the retaining ring and the retaining groove.

[0010] Preferably, the second limiting bar is perpendicular to the side wall of the lower housing and points to the central axis of the lower housing.

[0011] The beneficial effects of this utility model are as follows:

[0012] This utility model optimizes the valve core structure by using an integrated molding process to manufacture the ball head and valve stem, which are separate in the traditional structure, into an integrated valve core component. This not only reduces the assembly process between the ball head and valve stem and eliminates the need for additional connecting parts, but also simplifies the overall structural layout. While reducing the processing difficulty, it effectively reduces the number of parts, saves raw material procurement costs and production costs, and is more conducive to achieving large-scale mass production.

[0013] This invention provides a limiting rib extending axially and abutting against the side wall of the valve core at a position on the inner wall of the valve body corresponding to the movement path of the valve core. The limiting rib and the side wall of the valve core form a stable guiding relationship, which can effectively guide the radial displacement of the valve core, prevent the valve core from deviating and shaking when the fluid impacts or the equipment vibrates, and ensure that the valve core always moves smoothly along the preset trajectory, greatly improving the stability of the valve core movement, thereby ensuring the accuracy of the sealing surface fit and reducing the risk of leakage. Attached Figure Description

[0014] Figure 1 This is a cross-sectional structural diagram of the present invention;

[0015] Figure 2 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 3 yes Figure 2 Exploded view;

[0017] Figure 4 This is a cross-sectional structural diagram of the upper shell of this utility model;

[0018] Figure 5 This is a cross-sectional structural diagram of the lower shell of this utility model;

[0019] Figure 6This is a three-dimensional structural diagram of the lower shell of this utility model.

[0020] Figure label:

[0021] 1. Lower housing; 2. Upper housing; 3. Ball head; 4. Valve stem; 5. Spring; 6. First limit bar; 7. Second limit bar; 8. Liquid inlet; 9. Liquid outlet; 10. Locking ring; 11. Locking groove; 12. Valve core. Detailed Implementation

[0022] In the description of this utility model, it should be noted that the terms "upper / lower," "front / rear," "inner / outer," "top / bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and 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. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are only used to more clearly correspond to different connection positions in the description, and should not be construed as indicating or implying relative importance.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within the components of a compatible model. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, unless otherwise specified, all components used in this application are commercially available components, and the connection between different components can be achieved through conventional technical means.

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0025] A type of push rod valve, such as Figures 1-6As shown, the device includes a housing and a valve core 12 and a spring 5 installed inside the housing. Specifically, the housing includes an upper housing 2 and a lower housing 1 fixedly welded together. The valve core 12 includes a ball head 3 for sealing the liquid inlet 8 of the upper housing 2 and a valve stem 4. The valve stem 4 is installed in the center of the rear wall of the ball head 3. A spring 5 is sleeved on the outer periphery of the valve stem 4. One end of the spring 5 abuts against the rear wall of the ball head 3, and the other end abuts against the inner wall of the lower housing 1. The spring 5 is always arranged along the axial direction of the push rod valve. A first limiting bar 6 is provided inside the upper housing 2, which abuts against the side wall of the ball head 3. A second limiting bar 7 is formed inside the lower housing 1, which abuts against the side wall of the valve stem 4. The first limiting bar 6 and the second limiting bar 7 are used to limit the movement trajectory of the valve core 12.

[0026] like Figure 1 and Figure 3 As shown, preferably, the outer diameter of the front end of the ball head 3 is smaller than the outer diameter of the rear end, and the outer diameter of the rear end of the ball head 3 is larger than the outer diameter of the valve stem 4. At the same time, the ball head 3 and the valve stem 4 are integrally formed and both are made of rubber. Similarly, in actual production, other elastic materials can be selected to replace the rubber material according to the requirements. By directly combining the traditional shapes of the ball head 3 and the valve stem 4 into one integrated design and production, the production and use costs of parts can be saved, and the stability can be increased.

[0027] As a preferred option, such as Figures 1-6 As shown, a retaining ring 10 is formed at the rear end of the upper housing 2, and a retaining groove 11 is provided on the edge of the lower housing 1. The retaining ring 10 is fixedly retaining and welded in the groove 11. The upper housing 2 and the lower housing 1 are fixedly connected by the retaining ring 10 and the retaining groove 11.

[0028] It should be noted that, as Figure 6 As shown, the second limiting bar 7 is perpendicular to the side wall of the lower housing 1 and points to the central axis of the lower housing 1. This design allows the second limiting bar 7 to better guide the movement of the valve stem 4.

[0029] When gas or liquid enters the valve body through the inlet 8 under the action of an external pump or other power source, as more and more gas or liquid enters, the pressure of the gas or liquid will eventually exceed the elastic force of the spring 5. The gas or liquid will push the ball 3 and the valve stem 4 to move backward. During this process, the first limit bar 6 and the second limit bar 7 will restrict the movement trajectory of the ball 3 and the valve stem 4 to prevent them from deviating from the preset direction, so that they always move in a preset straight line. At this time, the entire push rod valve is in the open state, and the gas or liquid will flow out from the outlet 9 of the lower housing 1. When the conveying work is completed, the pressure of the gas or liquid decreases, and the spring 5 will push the valve core 12 back to the original position, cutting off the inlet 8 and closing the entire push rod valve.

[0030] Although the embodiments of this utility model have been described in the specification, these embodiments are merely illustrative and should not limit the scope of protection of this utility model. Various omissions, substitutions, and modifications made without departing from the spirit of this utility model should be included within the scope of protection of this utility model.

Claims

1. A push-rod valve, comprising a housing and a valve core and a spring mounted inside the housing, characterized in that, The housing includes an upper housing and a lower housing fixedly connected. The valve core includes a ball head for blocking the liquid inlet of the upper housing and a valve stem. The valve stem is installed in the center of the rear wall of the ball head. A spring is sleeved on the outer periphery of the valve stem. One end of the spring abuts against the rear wall of the ball head, and the other end abuts against the inner wall of the lower housing. A first limiting bar is provided inside the upper housing, and the first limiting bar abuts against the side wall of the ball head. A second limiting bar is formed inside the lower housing, and the second limiting bar abuts against the side wall of the valve stem. The first limiting bar and the second limiting bar are used to restrict the movement trajectory of the valve core.

2. A push-rod valve as described in claim 1, characterized in that, The outer diameter of the front end of the ball head is smaller than the outer diameter of the rear end, and the outer diameter of the rear end of the ball head is larger than the outer diameter of the valve stem.

3. A push-rod valve as described in claim 1 or 2, characterized in that, The ball head and the valve stem are integrally formed and both are made of rubber.

4. A push-rod valve as described in claim 1, characterized in that, The upper housing has a retaining ring at its rear end, and the lower housing has a retaining groove along its edge. The retaining ring is fixedly fitted into the retaining groove, and the upper housing and the lower housing are fixedly connected by the retaining ring and the retaining groove.

5. A push-rod valve as described in claim 1, characterized in that, The second limiting bar is perpendicular to the side wall of the lower housing and points to the central axis of the lower housing.

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