A valve having a self-adjusting stem

Abstract

This utility model belongs to the field of valve technology. It solves the problem in existing valve structures that it is difficult to balance the flexibility of valve stem rotation with the sealing performance between the valve stem and the valve body. It provides a valve with a self-adjusting valve stem, including a valve body and a valve core. The valve body has a cylindrical extension on its side wall, which is radially arranged and communicates with the interior of the valve body. The valve core is connected to a valve stem inserted into the extension. A sealing ring is fitted on the valve stem to seal against the inner wall of the extension. A valve cap with a clearance hole is threaded onto the extension. The top of the valve stem extends out of the clearance hole, and an annular protrusion is present on the outer peripheral wall of the valve stem. Several elastic elements are arranged axially along the valve stem between the inner top wall of the valve cap and the annular protrusion. Under the action of the elastic elements, the annular protrusion abuts against the extension, and the valve stem can rotate circumferentially relative to the extension. This design has the advantage of ensuring flexible valve stem opening and closing without affecting the sealing effect between the valve stem and the valve body extension.

Description

Technical Field

[0001] This utility model belongs to the field of valve technology and relates to a valve with a self-adjusting valve stem. Background Technology

[0002] Valves are pipeline accessories used to open and close pipelines and control and regulate the flow of transported media. They have functions such as shutting off, regulating, guiding, preventing backflow, stabilizing pressure, diverting flow, or overflowing and relieving pressure.

[0003] Existing valves typically consist of a valve body and a valve core with a valve stem housed within the valve body. A sealing structure is provided between the valve stem and the valve body. A connecting sleeve is fixed to the valve body by an internal hexagonal screw. The valve stem is inserted into the connecting sleeve and threadedly connected to it. The top of the valve stem extends upwards out of the connecting sleeve and is fixed to a rotating handle. Rotating the handle drives the valve stem to rotate, thereby moving the valve core up and down. This makes it difficult for the current valve structure to balance the flexibility of valve stem rotation with the sealing performance between the valve stem and the valve body, easily leading to situations where the valve stem cannot rotate flexibly or the seal between the valve stem and the valve body is not tight. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a valve with a self-adjusting valve stem. The technical problem this invention aims to solve is how to achieve flexible valve stem opening and closing while ensuring a good seal between the valve stem and the valve body.

[0005] The objective of this utility model can be achieved through the following technical solutions:

[0006] A valve with a self-adjusting valve stem includes a cylindrical valve body and a valve core disposed within the valve body. The valve body has a cylindrical extension on its side wall, the extension being radially arranged and communicating with the interior of the valve body. The valve core is connected to a valve stem inserted into the extension. The valve stem is characterized by having a sealing ring fitted onto it to seal against the inner wall of the extension. A valve cap with a clearance hole is threaded onto the extension. The top of the valve stem extends beyond the clearance hole, and an annular protrusion is present on the outer peripheral wall of the valve stem. A plurality of elastic elements arranged axially along the valve stem are disposed between the inner top wall of the valve cap and the annular protrusion. The annular protrusion abuts against the extension vertically under the action of the elastic elements, and the valve stem is circumferentially rotatable relative to the extension.

[0007] In use, the user can adjust the valve stem clamping force by rotating the valve cap clockwise or counterclockwise. Specifically, when the user rotates the valve cap clockwise, the valve cap moves downward relative to the extension of the valve body, and the inner top wall of the valve cap further compresses the elastic element, increasing the downward pressure of the elastic element on the annular protrusion. At this time, it becomes more difficult for the valve stem to rotate circumferentially relative to the extension. Similarly, when the user rotates the valve cap counterclockwise, the valve cap moves upward relative to the extension of the valve body, allowing the elastic element to return to a certain length, thereby reducing the downward pressure of the elastic element on the annular protrusion. At this time, it becomes less difficult for the valve stem to rotate circumferentially relative to the extension. This allows the user to adjust the valve stem clamping force by themselves using the above method, thus ensuring that the valve stem opens and closes flexibly without affecting the sealing effect between the valve stem and the extension of the valve body (the sealing effect between the valve stem and the extension of the valve body is mainly ensured by the sealing ring and the inner wall of the extension forming a seal).

[0008] In the aforementioned valve with a self-adjusting valve stem, the inner top wall of the valve cap has several positioning pins arranged along the valve stem axial direction. The upper ends of the elastic elements are all sleeved on the positioning pins, and the lower ends of the elastic elements are all pressed against the annular protrusion. The upper ends of the elastic elements are sleeved on the positioning pins to prevent the elastic elements from moving arbitrarily, so that the downward pressure of the elastic elements can be evenly applied to the annular protrusion.

[0009] In the aforementioned valve with a self-adjusting valve stem, the outer peripheral wall of the valve stem has several annular grooves spaced vertically apart, and the sealing rings are all embedded in these annular grooves. By providing multiple sealing rings, gas or liquid leakage from the valve stem can be prevented. Simultaneously, the sealing rings being embedded in the annular grooves prevents them from moving freely, ensuring a proper seal.

[0010] In the aforementioned valve with a self-adjusting valve stem, a rotating handle is bolted to the top of the valve stem, and an anti-loosening washer is provided between the bolt and the rotating handle. This facilitates easy assembly and disassembly of the rotating handle from the valve stem.

[0011] In the aforementioned valve with a self-adjusting valve stem, the valve core is plate-shaped, and its top has a connecting post fixed to the bottom of the valve stem. The outer wall of the valve core abuts against the inner wall of the valve body, separating the two ends of the valve body. This valve core structure offers excellent sealing performance, strong adaptability, and convenient operation. After the valve core is fixed to the bottom of the valve stem, the valve stem can be rotated synchronously to open and close the valve.

[0012] In the aforementioned valve with a self-adjusting stem, the rotary handle has a downwardly extending stop plate, and the outer wall of the extension section has a limiting plate. When the stop plate and the limiting plate abut against each other, the valve core isolates both ends of the valve body. This allows the user to control the valve's on / off state more precisely and intuitively, and makes operation more convenient.

[0013] Compared with existing technologies, the advantages of this valve with a self-adjusting valve stem are: users can adjust the clamping force of the valve stem themselves during use, thereby ensuring that the valve stem can open and close flexibly without affecting the sealing effect between the valve stem and the valve body extension. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of a valve with a self-adjusting valve stem.

[0015] Figure 2 This is a cross-sectional view of a valve with a self-adjusting stem.

[0016] Figure 3 yes Figure 2 A magnified view of a portion of point A in the middle.

[0017] Figure 4 This is an exploded view of a valve with a self-regulating stem.

[0018] In the diagram, 1 is the valve body; 1a is the extension section; 1a1 is the limiting plate; 2 is the valve core; 2a is the connecting column; 3 is the valve stem; 3a is the annular protrusion; 3b is the annular groove; 4 is the sealing ring; 5 is the valve cap; 5a is the relief hole; 5b is the positioning column; 6 is the elastic element; 7 is the bolt; 8 is the rotating handle; 8a is the stop plate; and 9 is the anti-loosening gasket. Detailed Implementation

[0019] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0020] A valve with a self-adjusting stem, as shown in the reference. Figure 1-4The valve includes a cylindrical valve body 1 and a valve core 2 disposed within the valve body 1. The valve body 1 has a cylindrical extension 1a on its side wall. The extension 1a is arranged radially along the valve body 1 and communicates with the interior of the valve body 1. The valve core 2 is connected to a valve stem 3 inserted into the extension 1a. A sealing ring 4 is fitted on the valve stem 3 to seal against the inner wall of the extension 1a. A valve cap 5 with a clearance hole 5a is threaded onto the extension 1a. The top of the valve stem 3 extends out of the clearance hole 5a and has an annular protrusion 3a on its outer peripheral wall. Several elastic elements 6 are arranged axially along the valve stem 3 between the inner top wall of the valve cap 5 and the annular protrusion 3a. The annular protrusion 3a abuts against the extension 1a vertically under the action of the elastic elements 6, and the valve stem 3 can rotate circumferentially relative to the extension 1a.

[0021] Reference Figure 2 , Figure 3 and Figure 4 Specifically, the inner top wall of the valve cap 5 has several positioning posts 5b arranged axially along the valve stem 3. The upper ends of the elastic elements 6 are all sleeved on the positioning posts 5b, and the lower ends of the elastic elements 6 are all pressed against the annular protrusions 3a. In this embodiment, the elastic elements 6 are preferably evenly distributed along the circumference of the valve stem 3. The elastic elements 6 are preferably springs, but can also be other elastic elements such as elastic rubber. The outer peripheral wall of the valve stem 3 has several annular grooves 3b arranged vertically at intervals, and the sealing rings 4 are all embedded in the annular grooves 3b.

[0022] Reference Figure 1 , Figure 2 and Figure 4 More specifically, the top of the valve stem 3 is fixed to a rotating handle 8 by bolts 7, and an anti-loosening washer 9 is provided between the bolts 7 and the rotating handle 8.

[0023] Reference Figure 1 , Figure 2 and Figure 4 More specifically, the valve core 2 is plate-shaped, and its top has a connecting post 2a, which is fixed to the bottom of the valve stem 3. The outer wall of the valve core 2 can abut against the inner wall of the valve body 1 and separate the two ends of the valve body 1. The rotating handle 8 has a downwardly extending stop plate 8a, and the outer wall of the extension section 1a has a limiting plate 1a1. When the stop plate 8a and the limiting plate 1a1 abut against each other, the valve core 2 separates the two ends of the valve body 1.

[0024] The working principle of this valve with a self-adjusting valve stem is explained below:

[0025] In use, the user only needs to rotate the valve cap 5 clockwise or counterclockwise to adjust the clamping force of the valve stem 3. Specifically, when the user rotates the valve cap 5 clockwise, the valve cap 5 moves downward relative to the extension section 1a of the valve body 1, and the inner top wall of the valve cap 5 further compresses the elastic element 6, increasing the downward pressure of the elastic elements 6 on the annular protrusion 3a. At this time, it becomes more difficult for the valve stem 3 to rotate circumferentially relative to the extension section 1a. Similarly, when the user rotates the valve cap 5 counterclockwise, the valve cap 5 moves upward relative to the extension section 1a of the valve body 1. This allows the elastic element 6 to return to a certain length, thereby reducing the downward pressure of the elastic elements 6 on the annular protrusion 3a. At this time, the difficulty of the valve stem 3 rotating circumferentially relative to the extension section 1a is reduced, allowing the user to adjust the clamping force of the valve stem 3 by means of the above method. This ensures that the valve stem 3 can open and close flexibly without affecting the sealing effect between the valve stem 3 and the extension section 1a of the valve body 1 (the sealing effect between the valve stem 3 and the extension section 1a of the valve body 1 is mainly ensured by the sealing ring 4 forming a sealing abutment with the inner wall of the extension section 1a).

[0026] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A valve with a self-adjusting valve stem, comprising a cylindrical valve body (1) and a valve core (2) arranged in the valve body (1), a side wall of the valve body (1) having a cylindrical extension (1a) arranged along the radial direction of the valve body (1) and communicating with the interior of the valve body (1), the valve core (2) being connected with a valve stem (3) inserted in the extension (1a), characterized in that, A sealing ring (4) is fitted on the valve stem (3) to seal against the inner wall of the extension section (1a). A valve cap (5) with a relief hole (5a) is threaded onto the extension section (1a). The top of the valve stem (3) extends out of the relief hole (5a) and the outer peripheral wall of the valve stem (3) has an annular protrusion (3a). A plurality of elastic elements (6) arranged along the axial direction of the valve stem (3) are provided between the inner top wall of the valve cap (5) and the annular protrusion (3a). The annular protrusion (3a) abuts against the extension section (1a) vertically under the action of the elastic elements (6), and the valve stem (3) can rotate circumferentially relative to the extension section (1a).

2. A valve having a self-adjusting stem according to claim 1, wherein, The valve cap (5) has several positioning posts (5b) arranged along the axial direction of the valve stem (3) on its inner top wall. The upper ends of the elastic members (6) are all sleeved on the positioning posts (5b), and the lower ends of the elastic members (6) are all pressed against the annular protrusion (3a).

3. The valve having a self-adjusting stem according to claim 1, wherein, The outer peripheral wall of the valve stem (3) has several annular grooves (3b) spaced vertically, and the sealing rings (4) are all embedded in the annular grooves (3b).

4. A valve having a self-adjusting stem according to claim 1 or 2 or 3, characterized in that, The top of the valve stem (3) is fixed to a rotating handle (8) by a bolt (7), and an anti-loosening washer (9) is provided between the bolt (7) and the rotating handle (8).

5. A valve having a self-adjusting stem according to claim 4, wherein, The valve core (2) is plate-shaped, and the top of the valve core (2) has a connecting post (2a). The connecting post (2a) is fixed to the bottom of the valve stem (3). The outer wall of the valve core (2) can abut against the inner wall of the valve body (1) and separate the two ends of the valve body (1).

6. A valve having a self-adjusting stem according to claim 5, wherein, The rotating handle (8) has a downwardly extending stop plate (8a), and the outer side wall of the extension section (1a) has a limiting plate (1a1). When the stop plate (8a) and the limiting plate (1a1) abut against each other, the valve core (2) separates the two ends of the valve body (1).

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