Stop valve

Abstract

The utility model discloses a stop valve which comprises a valve body, a valve rod extends out of the top of the valve body, a hand wheel for controlling rotation is arranged on the valve rod, a cylindrical neck portion integrated with the valve body is sleeved outside the valve rod, a limit cylinder for axially moving is sleeved on the neck portion, a clamp spring groove is arranged on the outer wall of the neck portion, and the clamp spring groove is arranged on the outer wall of the clamp spring groove. An outer clamping spring is embedded in the clamping spring groove, a check ring arranged on the limiting cylinder is arranged at the end, facing the valve body, of the outer clamping spring, and the neck is sleeved with a compression spring with one end abutting against the limiting cylinder and the other end abutting against the valve body. A follow-up supporting disc is arranged at the end, facing the valve body, of the hand wheel, and the top of the limiting cylinder abuts against the supporting disc in the natural state. The stop valve has the characteristics of leakage prevention and safety and reliability in use, and is complete in overall function and high in practicability.

Description

Technical Field

[0001] The utility model relates to a valve, more particularly to a stop valve. Background Art

[0002] Globe valves, also known as gate valves, are forced-seal valves. Therefore, when the valve is closed, pressure must be applied to the disc to prevent leakage. When the medium enters the valve from below the disc, the operating force must overcome the friction between the stem and packing, combined with the thrust generated by the medium's pressure. The force required to close the valve is greater than the force required to open it, so the valve stem diameter must be large; otherwise, the stem will bend.

[0003] The stop valve is usually connected in series to the pipe fittings of the equipment. If the equipment generates high-frequency vibration during operation, it will affect the locking of the stop valve. Long-term vibration will loosen the stop valve, resulting in poor overall performance. Based on this, the utility model proposes a stop valve. Utility Model Content

[0004] The purpose of the utility model is to overcome the above-mentioned deficiencies in the prior art and to provide a stop valve which is leak-proof and safe and reliable to use.

[0005] In order to solve the above technical problems, the purpose of the present invention is achieved as follows: the utility model involves a stop valve, including a valve body, a valve stem extending from the top of the valve body, and a handwheel for controlling rotation is provided on the valve stem. The valve stem is outer-circuited with a neck that is integrated with the valve body, and the neck is cylindrical. A limiting cylinder for axial movement is provided on the neck, and a retaining ring groove is provided on the outer wall of the neck, and an external retaining ring is embedded in the retaining ring groove. The end of the external retaining ring facing the valve body is provided with a retaining ring arranged on the limiting cylinder, and a compression spring is provided on the neck, one end of which is against the limiting cylinder and the other end is against the valve body.

[0006] The utility model is further configured as follows: a supporting disc is provided at one end of the hand wheel facing the valve body, and the top of the limiting cylinder in a natural state abuts against the supporting disc.

[0007] The utility model is further configured as follows: a plurality of tooth-shaped protrusions are distributed around the top of the limiting cylinder, a tooth-shaped groove matching the tooth-shaped protrusions is distributed on the support disc, and the tooth-shaped protrusions are embedded in the corresponding tooth-shaped grooves one by one.

[0008] The utility model is further configured such that the interval angles between two adjacent tooth-shaped protrusions are equal.

[0009] The utility model is further configured as follows: the supporting disc and the hand wheel are arranged coaxially.

[0010] In summary, the utility model has the following beneficial effects: the stop valve involved in the utility model, by setting a limit cylinder that presses against the handwheel in a natural state on the neck of the valve body, plays a role of locking the position of the handwheel after the rotation adjustment is completed, avoiding the loosening of the handwheel in a vibrating environment for a long time, preventing leakage, safe and reliable use, complete overall functions, and strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0012] Figure 2 It is a partial structural diagram of the utility model;

[0013] Figure 3 yes Figure 2 Schematic diagram of the enlarged structure of part A in the middle. DETAILED DESCRIPTION

[0014] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the preferred embodiments of the present invention are described below in conjunction with specific examples. However, it should be understood that these descriptions are only for the purpose of further illustrating the features and advantages of the present invention, and are not intended to limit the patent claims of the present invention. Based on the examples in the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0015] The present invention will be further described below with reference to the accompanying drawings and preferred embodiments.

[0016] Example 1

[0017] See also Figures 1 to 3 As shown, the stop valve involved in this embodiment includes a valve body 1, a valve stem 2 extending from the top of the valve body 1, and a handwheel 3 for controlling the rotation is provided on the valve stem 2. The valve stem 2 is covered with a neck 4 which is integrated with the valve body, and the neck 4 is cylindrical. A limiting cylinder 5 for axial movement is provided on the neck 4, and a retaining ring groove (not marked) is provided on the outer wall of the neck 4. An external retaining ring 6 is embedded in the retaining ring groove, and a retaining ring 7 is provided on the limit cylinder at one end of the external retaining ring 6 facing the valve body. A compression spring 8 is covered on the neck 4, with one end resting on the limit cylinder and the other end resting on the valve body.

[0018] Furthermore, a supporting disc 9 is provided at one end of the handwheel 3 facing the valve body, and the top of the limiting cylinder 5 in the natural state abuts against the supporting disc 9; the supporting disc 9 and the handwheel 3 are coaxially arranged.

[0019] Furthermore, a plurality of adjacent tooth-like protrusions 10 with equal angles are arranged around the top of the limiting cylinder 5, and a tooth-like groove 11 matching the tooth-like protrusions is arranged on the support disc 9, and the tooth-like protrusions 10 are embedded in the corresponding tooth-like grooves 11 one by one.

[0020] In this embodiment, one hand grasps and pulls down the limiting cylinder 5, causing it to move downward relative to the valve body 1 until the limiting cylinder 5, originally abutting the support disc 9, separates from the support disc 9. The other hand grasps and rotates the handwheel 3 to open and close the stop valve. Once the valve is opened or closed (or adjusted), the hand holding the limiting cylinder 5 is released. The deformed compression spring 8 returns the limiting cylinder 5 upward relative to the valve body 1, restoring the position until the top of the limiting cylinder 5 is back against the support disc 9, thereby achieving the circumferential limit function of the handwheel 3.

[0021] The tooth-shaped protrusions 10 and the tooth-shaped grooves 11 are arranged to increase friction and enhance the limiting effect.

[0022] The stop valve involved in the utility model has a limit cylinder that is naturally sleeved on the neck of the valve body to press against the hand wheel, thereby locking the position of the hand wheel after the rotation adjustment is completed, avoiding the hand wheel from loosening in a vibrating environment for a long time, preventing leakage, and being safe and reliable to use. It has complete overall functions and strong practicality.

[0023] Unless otherwise specified, in the present invention, if there are terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicating orientation or positional relationship, they are based on the orientation or positional relationship actually shown and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing orientation or positional relationship in the present invention are only used for illustrative purposes and cannot be understood as limiting this patent. For ordinary technicians in this field, they can combine the embodiments and understand the specific meanings of the above terms according to specific circumstances.

[0024] Unless otherwise specified or limited, the terms "disposed," "connected," and "connected" in this utility model should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections, indirect connections through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0025] The above describes in detail the preferred embodiments of the present invention. It should be understood that those skilled in the art can make numerous modifications and variations based on the concepts of the present invention without inventive effort. Therefore, any technical solutions that can be derived by those skilled in the art based on the concepts of the present invention through logical analysis, reasoning, or limited experimentation based on the existing technology should be within the scope of protection defined by the claims.

Claims

1. A stop valve, comprising a valve body, a valve stem extending from the top of the valve body, and a hand wheel for controlling rotation of the valve stem, characterized in that: The valve stem is outerly provided with a neck which is integrated with the valve body, and the neck is cylindrical. A limiting cylinder for axial movement is sleeved on the neck. A retaining ring groove is provided on the outer wall of the neck, and an external retaining ring is embedded in the retaining ring groove. A retaining ring is provided on the limiting cylinder at one end of the external retaining ring facing the valve body, and a compression spring is sleeved on the neck, with one end resting against the limiting cylinder and the other end resting against the valve body.

2. The stop valve according to claim 1, characterized in that: One end of the hand wheel facing the valve body is provided with a supporting disc for follow-up, and the top of the limiting cylinder in a natural state abuts against the supporting disc.

3. The stop valve according to claim 2, characterized in that: A plurality of tooth-shaped protrusions are arranged around the top of the limiting cylinder, and a plurality of tooth-shaped grooves matching the tooth-shaped protrusions are arranged on the support disc, and the tooth-shaped protrusions are embedded in the corresponding tooth-shaped grooves one by one.

4. The stop valve according to claim 3, characterized in that: The interval angles between two adjacent tooth-shaped protrusions are equal.

5. The stop valve according to any one of claims 2 to 4, characterized in that: The supporting disc and the hand wheel are coaxially arranged.

Images