CN209294512U - A micro pendulum type spherical contact globe valve - Google Patents

Abstract

The utility model discloses a micro-swing type spherical contact cut-off valve, which comprises a valve body. A medium inlet and a medium outlet are provided inside the valve body. A valve passage is connected between the medium inlet and the medium outlet. A valve disc is installed, and the outer part of the valve disc is covered with a valve disc sleeve. The upper end of the valve disc is connected with a concave spherical contact surface. A valve stem is installed in the valve channel above the concave spherical contact surface. The upper end of the valve stem runs through the valve body. One end of the valve stem placed outside the valve body is connected with a hand wheel. This micro-pendulum spherical contact stop valve, through the matching contact between the convex spherical contact surface and the concave spherical contact surface, this structure can automatically adjust the contact surface, from the original partial contact to the spherical surface fully enclosing most of the contact, reducing the valve stem and disc. The pressure damage of the contact surface prolongs the service life. This structure can automatically adjust the contact surface; the valve disc can swing slightly, increasing the free positioning of the valve disc, and the valve sealing effect is better.

Description

A micro pendulum type spherical contact globe valve

technical field

The utility model relates to the technical field of valves, in particular to a micro-swing type spherical contact cut-off valve.

Background technique

Globe valve, also known as cut-off valve, is a forced sealing valve, so when the valve is closed, pressure must be applied to the disc to force the sealing surface not to leak. When the medium enters the valve from the bottom of the disc, the resistance that the operating force needs to overcome is the friction between the valve stem and packing and the thrust generated by the pressure of the medium. The force to close the valve is greater than the force to open the valve, so the valve stem The diameter of the valve must be large, otherwise the failure of the valve stem to bend will occur. According to the connection method, it can be divided into three types: flange connection, screw connection and welding connection. After the emergence of self-sealing valves, the flow direction of the medium of the globe valve is changed to enter the valve cavity from the top of the disc. At this time, under the action of the medium pressure, the force to close the valve is small, but the force to open the valve is large, and the diameter of the valve stem can be adjusted accordingly. reduced. At the same time, under the action of the medium, this form of valve is also tighter.

The lower end of the valve stem of the existing globe valve is spherical, the upper end of the valve disc is flat, and the contact surface is small. When the valve is closed, it is easy to crush the contact surface, affecting the positioning of the valve disc and thus affecting the sealing effect of the sealing surface of the valve, shortening the use of the valve. life.

Utility model content

The purpose of the utility model is to provide a micro-swing type spherical contact cut-off valve, which has the advantages of automatically adjusting the contact surface and prolonging the service life, and solves the problems in the prior art.

In order to achieve the above purpose, the utility model provides the following technical solutions: a micro-swing type spherical contact stop valve, including a valve body, the inside of the valve body is provided with a medium inlet and a medium outlet, between the medium inlet and the medium outlet A valve channel is connected, and a valve disc is installed in the valve channel. The valve disc is covered with a valve disc sleeve. The upper end of the valve disc is connected with a concave spherical contact surface, and a valve stem is installed in the valve channel above the concave spherical contact surface. The upper end of the valve stem runs through the valve body, the end of the valve stem placed outside the valve body is connected with a handwheel, the valve stem below the handwheel is equipped with front and rear guide plates through bolts, and the lower end of the valve stem is connected with a convex spherical contact surface, the convex surface The spherical contact surface is in contact with the concave spherical contact surface, the two sides of the convex spherical contact surface are engaged with the inner wall of the disc sleeve, the upper end of the convex spherical contact surface is connected with a limit ring, and the lower surface of the limit ring is in contact with the valve disc sleeve, Packing is installed in the valve channel above the limit ring, the upper surface of the packing is connected with a packing gland, one end of the packing gland runs through a slip bolt, and the lower end of the slip bolt is connected to the valve body through a cylindrical pin, The upper end of the slip bolt is fixed with the packing gland through the hex nut.

Preferably, the valve stem runs through the packing and the packing gland.

Preferably, the outer wall of the valve flap sleeve is connected to the inner wall of the valve channel.

Preferably, the convex spherical contact surface matches the concave spherical contact surface.

Preferably, a bracket is installed on the valve stem between the front and rear guide plates and the handwheel, one side of the bracket is fixedly connected with the valve body, and the valve stem passes through the bracket and the front and rear guide plates.

Preferably, there is a movable space for the limiting ring between the valve disc sleeve and the filler.

Compared with the prior art, the beneficial effects of the utility model are as follows:

The micro pendulum type spherical contact stop valve has a concave spherical contact surface on the upper end of the disc, and a convex spherical contact surface on the lower end of the valve stem. The convex spherical contact surface and the concave spherical contact surface are matched and contacted. This structure can be automatically adjusted. The contact surface is changed from the original partial contact to a spherical surface that fully surrounds most of the contact, reducing the pressure damage on the contact surface between the valve stem and the disc, and prolonging the service life. This structure can automatically adjust the contact surface. The micro pendulum type spherical contact globe valve, the disc can swing slightly, increasing the free positioning of the disc, and the sealing effect of the valve is better.

Description of drawings

Fig. 1 is the overall structural diagram of the utility model;

Fig. 2 is a partial structural diagram of the utility model;

Fig. 3 is the original partial structural diagram of the utility model.

In the figure: 1, valve body; 11, medium inlet; 12, medium outlet; 13, valve channel; 2, valve disc; 21, concave spherical contact surface; 3, valve disc sleeve; 4, valve stem; 41, convex Spherical contact surface; 42, limit ring; 5, packing; 6, packing gland; 7, slip bolt; 71, cylindrical pin; 72, hex nut; 8, hand wheel; 9, front and rear guide plates.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Please refer to Figure 1-3, a micro pendulum spherical contact stop valve, including a valve body 1, the inside of the valve body 1 is provided with a medium inlet channel 11 and a medium outlet channel 12, and a medium inlet channel 11 and a medium outlet channel 12 are connected. The valve channel 13, the valve disc 2 is installed in the valve channel 13, the outer part of the valve disc 2 is covered with the valve disc sleeve 3, the valve disc 2 and the valve disc sleeve 3 are movably connected, and the upper end of the valve disc 2 is connected with a concave spherical contact surface 21, A valve stem 4 is installed in the valve channel 13 above the concave spherical contact surface 21. The upper end of the valve stem 4 runs through the valve body 1. The end of the valve stem 4 placed outside the valve body 1 is connected with a handwheel 8. The valve below the handwheel 8 Front and rear guide plates 9 are installed on the rod 4 through bolts, and a bracket is installed on the valve stem 4 between the front and rear guide plates 9 and the hand wheel 8. One side of the bracket is fixedly connected with the valve body 1, and the valve stem 4 runs through the bracket and the front and rear guide plates 9. The rotation of the hand wheel 8 drives the valve stem 4 to move up and down. The lower end of the valve stem 4 is connected with a convex spherical contact surface 41, which matches the concave spherical contact surface 21, and the convex spherical contact surface 41 matches the concave spherical contact surface 21. The contact is changed from the original partial contact to a spherical surface that fully surrounds most of the contact, reducing damage to the contact surface of the valve stem 4 and prolonging the service life. The outer wall of 3 is connected with the inner wall of the valve channel 13, the upper end of the convex spherical contact surface 41 is connected with the limit ring 42, the lower surface of the limit ring 42 is in contact with the disc sleeve 3, and the valve channel 13 above the limit ring 42 is installed There is a packing 5, and there is a space for the limit ring 42 to move between the disc sleeve 3 and the packing 5. When the valve stem 4 moves up and down, it drives the limit ring 42 to move up and down. The upper surface of the packing 5 is connected with the packing gland 6, and the valve The rod 4 runs through the packing 5 and the packing gland 6, one end of the packing gland 6 runs through a slip bolt 7, the lower end of the slip bolt 7 is connected to the valve body 1 through a cylindrical pin 71, and the upper end of the slip bolt 7 is connected to the packing pressure through a hex nut 72. Cover 6 is fixed.

Working process: When in use, by turning the hand wheel 8 upward, the valve stem 4 moves upward, driving the convex spherical contact surface 41 to move upward, and separates from the concave spherical contact surface 21, the valve disc 2 moves, and the medium enters from the medium inlet 11 , through the valve channel 13 below the valve stem 4, and flow out from the medium outlet 12. When closing the valve, turn the hand wheel 8 downward, the valve stem 4 moves down, the convex spherical contact surface 41 contacts with the concave spherical contact surface 21, and Push the valve disc 2 to move down, cooperate with the valve disc sleeve 3, block the valve channel 13, and block the communication between the medium inlet channel 11 and the medium outlet channel 12.

To sum up: the micro pendulum type spherical contact stop valve has a concave spherical contact surface 21 on the upper end of the disc 2, and a convex spherical contact surface 41 is connected to the lower end of the valve stem 4, through which the convex spherical contact surface 41 and the concave spherical surface The contact surface 21 matches the contact, this structure can automatically adjust the contact surface, from the original partial contact to the spherical surface fully surrounding most of the contact, reducing the pressure damage on the contact surface between the valve stem 4 and the valve disc 2, and prolonging the service life. Can automatically adjust the contact surface. The micro pendulum type spherical contact globe valve, the disc can swing slightly, increasing the free positioning of the disc, and the sealing effect of the valve is better.

It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is a relationship between these entities or operations. any such actual relationship or order exists between them. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article or apparatus comprising a set of elements includes not only those elements, but also includes elements not expressly listed. other elements of or also include elements inherent in such a process, method, article, or apparatus.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes and modifications can be made to these embodiments without departing from the principle and spirit of the present invention , replacements and modifications, the scope of the present utility model is defined by the appended claims and their equivalents.

Claims (7)

1. a kind of micro- pendulum-type sphere-contact shut-off valve, including valve body (1), it is characterised in that: the inside of the valve body (1) offers Medium access (11) and medium are engaged in this profession (12), and medium access (11) and medium engage in this profession and be connected with valve passage (13), valve between (12) It is equipped with flap (2) in channel (13), the outside of the flap (2) is cased with flap set (3), and the upper end of flap (2) is connected with recessed Sphere-contact face (21) is equipped with valve rod (4) in the valve passage (13) above concave spherical surface contact surface (21), the valve rod (4) Valve body (1) is run through in upper end, and valve rod (4) is placed in the external one end of valve body (1) and is connected with handwheel (8), the valve rod below handwheel (8) (4) it is equipped with front and back guide plate (9) on by bolt, the lower end of valve rod (4) is connected with convex spherical contact surface (41), convex spherical contact Face (41) is in contact with concave spherical surface contact surface (21), and the two sides of convex spherical contact surface (41) engage with the inner wall of flap set (3), convex The upper end in sphere-contact face (41) is connected with spacing collar (42), and the lower surface of spacing collar (42) is in contact with flap set (3), limit It is equipped with filler (5) in valve passage (13) above circle (42), the upper surface of the filler (5) is connected with gland (6), institute One end of gland (6) is stated through having slip-knot bolt (7), the lower end of the slip-knot bolt (7) passes through straight pin (71) and valve The upper end of body (1) connection, slip-knot bolt (7) is fixed by hex nut (72) and gland (6).

2. a kind of micro- pendulum-type sphere-contact shut-off valve according to claim 1, it is characterised in that: the valve rod (4) is run through Filler (5) and gland (6).

3. a kind of micro- pendulum-type sphere-contact shut-off valve according to claim 1, it is characterised in that: the flap set (3) Outer wall is connect with the inner wall of valve passage (13).

4. a kind of micro- pendulum-type sphere-contact shut-off valve according to claim 1, it is characterised in that: the convex spherical contact surface (41) match with concave spherical surface contact surface (21).

5. a kind of micro- pendulum-type sphere-contact shut-off valve according to claim 1, it is characterised in that: the front and back guide plate (9) Bracket is installed, the side of bracket is fixedly connected with valve body (1), and valve rod (4) is through branch on the valve rod (4) between handwheel (8) Frame and front and back guide plate (9).

6. a kind of micro- pendulum-type sphere-contact shut-off valve according to claim 1, it is characterised in that: the flap set (3) and There are spacing collar (42) movable spaces between filler (5).

7. a kind of micro- pendulum-type sphere-contact shut-off valve according to claim 1, it is characterised in that: the flap (2) can be micro- Micro- swing.