CN111720558A - Stop valve - Google Patents

Abstract

The invention provides a stop valve, comprising: a valve body; a valve cover; a valve stem; a turntable; a plurality of valve cartridges; rotating the handle; a transmission rod; an adjusting handle; a first bevel gear; a second bevel gear. According to the stop valve disclosed by the embodiment of the invention, the structure is simple, and the valve core of the stop valve can be replaced on line without stopping.

Description

Stop valve

Technical Field

The invention belongs to the technical field of pipeline valves, and particularly relates to a stop valve.

Background

The stop valve is the most widely used valve and structurally comprises a valve body, a valve cover, a valve rod driving mechanism, a filler and other components, wherein an inlet cavity and an outlet cavity are formed in the valve body, a horizontal communicating port is formed between the inlet cavity and the outlet cavity, a valve core is installed on the valve rod, and the valve is opened and closed by vertically lifting or lowering the communicating port through the valve rod driving mechanism or closing the communicating port. The valve core of the existing stop valve is easy to be damaged due to long-time medium scouring in the use process; when the valve core damages and causes the leakage, need stop whole pipeline or equipment, pull down the stop valve and maintain or change, influence production efficiency, moreover, many operating modes do not allow equipment to shut down, in case shut down can cause great economic loss.

Disclosure of Invention

The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.

Therefore, an object of the present invention is to provide a shut-off valve with a simple structure, which can replace the spool of the shut-off valve on-line without stopping the shut-off valve.

A shut-off valve according to an embodiment of the present invention includes:

a valve body having an inlet chamber and an outlet chamber and a communication port communicating the inlet chamber and the outlet chamber;

the valve cover is arranged on the valve body, a vertical through hole is formed in the valve cover and is positioned right above the communication port, and a vertical groove is formed in the inner wall of the vertical through hole;

the valve rod is matched in the vertical through hole, the upper end of the valve rod extends upwards out of the valve cover, the lower end of the valve rod extends into the valve body, the lower end of the valve rod is provided with a connecting disc which is obliquely arranged, the lower surface of the connecting disc is provided with a rotating shaft which is orthogonal to the connecting disc, an external thread is arranged on the outer peripheral wall of the upper part of the valve rod, a flat key which is positioned below the external thread is arranged on the side wall of the valve rod, and the flat key is matched with the vertical groove;

the rotating disc is sleeved on the rotating shaft, and a cavity is defined between the rotating disc and the connecting disc;

the valve cores are arranged on the lower surface of the rotary disc and are uniformly arranged at intervals along the circumferential direction of the rotary disc, and the included angle between each valve core and the rotary shaft is equal to the included angle between the rotary shaft and the valve rod;

a twist grip rotatably provided on the valve housing, an upper end of the valve stem passing upward through the twist grip to threadedly connect the upper end of the valve stem with the twist grip;

the transmission rod penetrates through the valve rod, the upper end of the transmission rod upwards extends out of the upper end face of the valve rod, and the lower end of the transmission rod extends into the cavity;

the adjusting handle is connected with the upper end of the transmission rod;

the first bevel gear is arranged in the cavity and connected with the lower end of the transmission rod;

and the second bevel gear is arranged in the cavity and is connected with the turntable, and the second bevel gear is coaxial with the rotating shaft and is meshed with the first bevel gear.

Advantageously, the number of the valve cores is 3-5.

Advantageously, the number of said plurality of spools is 4.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

FIG. 1 is a schematic view of a shut-off valve according to one embodiment of the present invention;

FIG. 2 is a schematic view of a spool assembly of a stop valve according to another embodiment of the invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

A shut-off valve according to an embodiment of the present invention is described in detail below with reference to the accompanying drawings.

As shown in fig. 1 and 2, a shutoff valve according to an embodiment of the present invention includes: the valve comprises a valve body 1, a valve cover 13, a valve rod 2, a rotary disc 6, a plurality of valve cores 10, a rotary handle 11, a transmission rod 3, an adjusting handle 12, a first bevel gear 9 and a second bevel gear 7.

Specifically, the valve body 1 has an inlet chamber 101 and an outlet chamber 102, and a communication port 103 that communicates the inlet chamber 101 and the outlet chamber 102.

The bonnet 13 is arranged on the valve body 1, a vertical through hole is arranged on the bonnet 13 and is positioned right above the communication port 103, and a vertical groove 13a is arranged on the inner wall of the vertical through hole.

Valve rod 2 cooperation is in the vertical through-hole, the lower extreme that upwards stretches out valve gap 13 and valve rod 2 in the upper end of valve rod 2 stretches into valve body 1, and the lower extreme of valve rod 2 has connection pad 5 that the slope was arranged, and the lower surface of connection pad 5 has the pivot 8 with connection pad 5 quadrature, has the external screw thread on the periphery wall on the upper portion of valve rod 2, is equipped with on the lateral wall of valve rod 2 to be located flat key 4 below the external screw thread, flat key 4 and vertical groove 13a cooperation.

The rotating disc 6 is sleeved on the rotating shaft 8, and a cavity is defined between the rotating disc 6 and the connecting disc 5.

A plurality of case 10 are established on the lower surface of carousel 6 and are evenly arranged along the circumference of carousel 6 interval, and the contained angle of every case 10 and pivot 8 equals the contained angle of pivot 8 and valve rod 2. Advantageously, the number of the plurality of spools 10 is 3-5. Further, the number of the plurality of valve cartridges 10 is 4.

The twist grip 11 is rotatably provided on the valve housing 13, and the upper end of the valve stem 2 passes upward through the twist grip 11 to screw-couple the upper end of the valve stem 2 with the twist grip 11.

The transmission rod 3 penetrates through the valve rod 2, the upper end of the transmission rod 3 upwards extends out of the upper end face of the valve rod 2, and the lower end of the transmission rod 3 extends into the cavity.

An adjustment handle 12 is connected to the upper end of the transmission rod 3.

A first bevel gear 9 is arranged in the shown cavity and connected to the lower end of the drive rod 3.

A second bevel gear 7 is arranged in the cavity and connected with the rotating disc 6, and the second bevel gear 7 is coaxial with the rotating shaft 8 and meshed with the first bevel gear 9.

Opening and closing of a shut-off valve according to an embodiment of the present invention: as shown in fig. 1, the rotating handle 11 is rotated, and due to the sliding fit between the flat key 4 and the vertical groove 13a, the valve rod 2 is in threaded fit with the vertical through hole of the valve housing, so that the rotating handle 11 can make the valve rod 2 rise or fall when rotating, and the valve rod 2 does not rotate, and the valve rod 2 can drive the valve core 10 to open or close the communication port 103, thereby realizing the opening and closing of the stop valve.

The valve core of the stop valve according to the embodiment of the invention is changed: when the valve core 10 needs to be replaced, firstly, the rotating handle 11 is rotated, the valve rod 2 is lifted, the stop valve is in an open state, the adjusting handle 12 is rotated, the first bevel gear 9 is driven to rotate through the transmission rod 3, the valve rod 2 cannot rotate due to the positioning of the flat key 4, the second bevel gear 7 and the rotary disc 6 are fixedly matched together due to the meshing of the first bevel gear 9 and the second bevel gear 7, the first bevel gear 9 drives the rotary disc 6 to rotate around the rotating shaft 8 through the second bevel gear 7, the original valve core 10 is rotated away from a working position right opposite to the lower part of the valve rod 2, a new valve core 10 is rotated to the working position to stop, and the conversion of the stop valve core 10 is completed. The rotation angle of the adjustment handle 12 is related to the number of the valve cartridges 10. Taking 4 valve cores as an example, when the valve cores need to be switched, the adjusting handle 12 is rotated by 90 degrees.

According to the stop valve provided by the embodiment of the invention, the valve sleeve is provided with the plurality of valve cores, and different valve cores can be selected to be in the working positions through rotation, so that when the valve core in the working position is damaged to cause leakage, the valve core can be replaced through rotation, and a new valve core is in the working position. Compared with a stop valve with a single valve core, the stop valve can replace the valve core without stopping the machine, ensures the continuous work of a pipeline or equipment, improves the running efficiency of a system, and avoids economic loss caused by frequent stopping, maintenance and replacement of the valve core.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims (3)

1. A shut-off valve, comprising:

a valve body having an inlet chamber and an outlet chamber and a communication port communicating the inlet chamber and the outlet chamber;

the valve cover is arranged on the valve body, a vertical through hole is formed in the valve cover and is positioned right above the communication port, and a vertical groove is formed in the inner wall of the vertical through hole;

the valve rod is matched in the vertical through hole, the upper end of the valve rod extends upwards out of the valve cover, the lower end of the valve rod extends into the valve body, the lower end of the valve rod is provided with a connecting disc which is obliquely arranged, the lower surface of the connecting disc is provided with a rotating shaft which is orthogonal to the connecting disc, an external thread is arranged on the outer peripheral wall of the upper part of the valve rod, a flat key which is positioned below the external thread is arranged on the side wall of the valve rod, and the flat key is matched with the vertical groove;

the rotating disc is sleeved on the rotating shaft, and a cavity is defined between the rotating disc and the connecting disc;

the valve cores are arranged on the lower surface of the rotary disc and are uniformly arranged at intervals along the circumferential direction of the rotary disc, and the included angle between each valve core and the rotary shaft is equal to the included angle between the rotary shaft and the valve rod;

a twist grip rotatably provided on the valve housing, an upper end of the valve stem passing upward through the twist grip to threadedly connect the upper end of the valve stem with the twist grip;

the transmission rod penetrates through the valve rod, the upper end of the transmission rod upwards extends out of the upper end face of the valve rod, and the lower end of the transmission rod extends into the cavity;

the adjusting handle is connected with the upper end of the transmission rod;

the first bevel gear is arranged in the cavity and connected with the lower end of the transmission rod;

and the second bevel gear is arranged in the cavity and is connected with the turntable, and the second bevel gear is coaxial with the rotating shaft and is meshed with the first bevel gear.

2. The shutoff valve of claim 1, wherein the number of said plurality of spools is 3-5.

3. The shut-off valve of claim 2, wherein the number of the plurality of spools is 4.

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