Detachable valve rod structure

Abstract

The utility model discloses a detachable valve rod structure applied to the field of flow control equipment, which comprises a valve rod core, one end of the valve rod core is provided with a positioning screw hole, the other end of the valve rod core is provided with a mounting screw hole, the inside of the positioning screw hole is in threaded connection with a connecting rod head, and the outer side of the connecting rod head is provided with a connecting thread. The valve starting and stopping assembly can be matched with the valve sleeve to adjust the flow at the position of a valve port, the connecting rod head can be in threaded connection with the interior of the valve sleeve, a reset spring can be placed in the reset screw hole to be connected with the valve, the valve sleeve can be connected with the reset spring, and the reset spring can be connected with the valve through the reset screw hole. The valve rod core is convenient to reset, the two sides of the start-stop nut can be sealed through the arranged positioning nut and the arranged sealing ring, when the valve start-stop assembly and the end cover assembly are damaged, the end cover assembly and the valve start-stop assembly can be taken down and replaced, only a single accessory needs to be replaced after the single accessory on the valve rod core is damaged, and cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of flow control equipment, in particular to a detachable valve stem structure. Background Art

[0002] The valve stem is an important component of the valve and is mainly used for transmission. It is connected to the actuator or handle on the top and directly drives the valve core to move or rotate below to realize the valve opening or closing or regulation. The valve stem is not only a moving part and a force-bearing part in the process of opening and closing the valve, but also a sealing part. It is impacted and corroded by the medium and produces friction with the packing. The valve stem is an indispensable part of the valve. Its structural design and material selection are crucial to the performance and safety of the valve. When using the valve, the status of the valve stem should be checked regularly to ensure that it is in good working condition.

[0003] Conventional valve stem specifications and sizes are generally used for a specific valve. The start-stop nut in the valve stem is generally matched with the size of the valve sleeve to close the valve port and is used to start and stop the valve. The sealing friction end of the valve stem is generally adapted to the inner wall size of the valve sleeve, and has low applicability. Common valve stems are mostly one-piece forging production. When a single component is damaged, the entire valve stem needs to be scrapped, which is not economical. Therefore, a detachable valve stem structure is needed to solve the above problems. Utility Model Content

[0004] The purpose of the present utility model is to provide high-speed pretreatment water treatment equipment to solve the problem raised in the above background technology: conventional valve stem specifications and sizes are generally used for a specific valve, with low applicability; common valve stems are mostly one-piece forging production, and when a single part component is damaged, the entire valve stem needs to be scrapped, which is poorly economical.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a detachable valve stem structure, comprising a valve stem core, one end of the valve stem core is provided with a positioning screw hole, the other end of the valve stem core is provided with a mounting screw hole, the inner thread of the positioning screw hole is connected to a connecting rod head, the outer side of the connecting rod head is provided with a connecting thread, the end of the connecting rod head away from the valve stem core is provided with a reset screw hole, the outer surface of the valve stem core is provided with a thread on the side away from the connecting rod head, the outer surface of the valve stem core is provided with a thread on the side away from the connecting rod head, the valve start-stop assembly is threadedly connected to the inner wall of the mounting screw hole, the The internal thread of the mounting screw hole is connected with an end cover assembly, and the purpose of this arrangement is: the valve start-stop assembly can be coordinated with the valve sleeve to adjust the flow at the valve port, and the connecting rod head can be connected to the internal thread of the valve sleeve, and a reset spring can be placed in the reset screw hole to connect with the valve, so as to facilitate the reset of the valve stem core, and the start-stop nut can be sealed on both sides by the positioning nut and the sealing ring, and when the valve start-stop assembly and the end cover assembly are damaged, the end cover assembly and the valve start-stop assembly can be removed and replaced respectively, so that when a single accessory on the valve stem core is damaged, only a single accessory needs to be replaced, thereby saving costs.

[0006] Preferably, the valve start-stop assembly includes a start-stop nut and two positioning nuts.

[0007] Preferably, the start-stop nut and the two positioning nuts are all threadedly connected to a side of the outer surface of the valve stem core away from the connecting rod head.

[0008] Preferably, a sealing ring is inserted between the two positioning nuts and the start-stop nut.

[0009] Preferably, the end cover assembly includes a mounting screw, and the mounting screw is threadedly connected to the mounting screw hole.

[0010] Preferably, one end of the mounting screw is fixedly connected to a sealing gasket cover.

[0011] The technical effects and advantages of this utility model are:

[0012] (1) The device can adjust the flow at the valve port by cooperating with the valve sleeve through the valve start-stop assembly provided, and can be connected to the internal thread of the valve sleeve through the connecting rod head provided. A reset spring can be placed in the reset screw hole to connect with the valve, which is convenient for resetting the valve stem core. The start-stop nut and the sealing ring provided can be sealed on both sides. When the valve start-stop assembly and the end cover assembly are damaged, the end cover assembly and the valve start-stop assembly can be removed and replaced respectively, so that when a single accessory on the valve stem core is damaged, only the single accessory needs to be replaced, which saves costs and solves the problem that conventional valve stem specifications and sizes are generally used for a specific valve, have low applicability, and common valve stems are mostly one-piece forging production. When a single part component is damaged, the entire valve stem needs to be scrapped, which is poor in economy.

[0013] (2) The device can select a suitable sealing gasket cover according to the size of the inner wall of the valve sleeve through the detachable end cover assembly, and select a suitable start-stop nut according to the size of the valve sleeve port, and has good adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the connection structure of one end of the valve stem core in the utility model;

[0016] Figure 3 This is a schematic diagram of the connection structure of the other end of the valve stem core in the present invention;

[0017] Figure 4 It is a structural schematic diagram of the end cover assembly of the utility model.

[0018] In the figure: 1. Valve stem core; 2. Connecting rod head; 3. Valve start-stop assembly; 301. Start-stop nut; 302. Positioning nut; 303. Sealing ring; 4. End cover assembly; 401. Mounting screw; 402. Sealing gasket cover; 5. Reset screw hole; 6. Mounting screw hole; 7. Positioning screw hole. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] The utility model provides Figure 1-4 The detachable valve stem structure shown includes a valve stem core 1, a positioning screw hole 7 is provided at one end of the valve stem core 1, and a mounting screw hole 6 is provided at the other end of the valve stem core 1. The internal thread of the positioning screw hole 7 is connected to the connecting rod head 2, and the outer side of the connecting rod head 2 is provided with a connecting thread. A reset screw hole 5 is provided at the end of the connecting rod head 2 away from the valve stem core 1, and a thread is provided on the side of the outer surface of the valve stem core 1 away from the connecting rod head 2. The side of the outer surface of the valve stem core 1 away from the connecting rod head 2 is threadedly connected to the valve start-stop assembly 3, the inner wall of the mounting screw hole 6 is provided with a thread, and the internal thread of the mounting screw hole 6 is connected to the end cover assembly 4.

[0021] like Figure 1-4The detachable valve stem structure shown in the figure, the valve start-stop assembly 3 includes a start-stop nut 301 and two positioning nuts 302, the start-stop nut 301 and the two positioning nuts 302 are both threadedly connected to the side of the outer surface of the valve stem core 1 away from the connecting rod head 2, and a sealing ring 303 is inserted between the two positioning nuts 302 and the start-stop nut 301, and the end cover assembly 4 includes a mounting screw 401, which is threadedly connected to the mounting screw hole 6, and one end of the mounting screw 401 is fixedly connected to a sealing gasket cover 402.

[0022] The working principle of the utility model is as follows: the valve start-stop component 3 can be matched with the valve sleeve to adjust the flow at the valve port, the connecting rod head 2 can be connected to the internal thread of the valve sleeve, and a reset spring can be placed in the reset screw hole 5 to connect with the valve, which is convenient for resetting the valve stem core 1. The detachable end cover component 4 can be used to select a suitable sealing gasket cover 402 according to the size of the inner wall of the valve sleeve, and the suitable start-stop nut 301 can be selected according to the size of the valve sleeve port, which has good adaptability. The positioning nut 302 and the sealing ring 303 can be used to seal both sides of the start-stop nut 301, and when the valve start-stop component 3 and the end cover component 4 is damaged, the end cover assembly 4 and the valve start-stop assembly 3 can be removed and replaced respectively, so that when a single accessory on the valve stem core 1 is damaged, only a single accessory needs to be replaced, saving costs. When replacing the valve start-stop assembly 3, first remove the end cover assembly 4, then remove the positioning nut 302 and the sealing ring 303 on the side close to the end cover assembly 4, and after removing the start-stop nut 301, thread the new start-stop nut 301 to one end of the valve stem core 1, so that the start-stop nut 301 contacts the sealing ring 303 and positioning nut 302 that have not been removed, and then reset the sealing ring 303 and positioning nut 302 in turn, and reset the end cover assembly 4.

[0023] In the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0024] The standard parts used in the present invention can all be purchased from the market, and special-shaped parts can all be customized according to the description and the drawings.

[0025] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A detachable valve stem structure, comprising a valve stem core (1), characterized in that: One end of the valve stem core (1) is provided with a positioning screw hole (7), and the other end of the valve stem core (1) is provided with a mounting screw hole (6). The internal thread of the positioning screw hole (7) is connected to the connecting rod head (2), and the outer side of the connecting rod head (2) is provided with a connecting thread. The end of the connecting rod head (2) away from the valve stem core (1) is provided with a reset screw hole (5). The side of the outer surface of the valve stem core (1) away from the connecting rod head (2) is provided with a thread. The side of the outer surface of the valve stem core (1) away from the connecting rod head (2) is threadedly connected to the valve start-stop assembly (3), the inner wall of the mounting screw hole (6) is provided with a thread, and the internal thread of the mounting screw hole (6) is connected to the end cover assembly (4).

2. The detachable valve stem structure according to claim 1, characterized in that: The valve start-stop assembly (3) comprises a start-stop nut (301) and two positioning nuts (302).

3. The detachable valve stem structure according to claim 2, characterized in that: The start-stop nut (301) and the two positioning nuts (302) are all threadedly connected to a side of the outer surface of the valve stem core (1) away from the connecting rod head (2).

4. The detachable valve stem structure according to claim 3, characterized in that: A sealing ring (303) is inserted between the two positioning nuts (302) and the start-stop nut (301).

5. The detachable valve stem structure according to claim 1, characterized in that: The end cover assembly (4) comprises a mounting screw (401), and the mounting screw (401) is threadedly connected to the mounting screw hole (6).

6. The detachable valve stem structure according to claim 5, characterized in that: One end of the mounting screw (401) is fixedly connected to a sealing gasket cover (402).

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