CN203009886U

CN203009886U - Constant-force gate valve

Info

Publication number: CN203009886U
Application number: CN 201320007477
Authority: CN
Inventors: 金哲龙
Original assignee: SUZHOU YUDONG HVAC TECHNOLOGY Co Ltd
Current assignee: SUZHOU YUDONG HVAC TECHNOLOGY Co Ltd
Priority date: 2013-01-08
Filing date: 2013-01-08
Publication date: 2013-06-19
Anticipated expiration: 2023-01-08

Abstract

The utility model discloses a constant-force gate valve comprising a valve body, wherein the valve body is provided with an inner cavity; both the left end and the right end of the inner cavity are communicated with water ports; sealing surfaces are arranged on the left side and the right side of the inner cavity; a valve rod is pivoted in the inner cavity and connected with a power device; meanwhile, non-rotatable sealing pieces are arranged on both the left side and the right side of the inner cavity; the outer side surfaces of the two sealing pieces are respectively matched with the two sealing surfaces; a pressure spring is arranged between the two sealing pieces; a valve core is clamped between the two sealing pieces in a non-rotatable manner; and the valve core is in threaded fit with the valve rod. The constant-force gate valve has the advantages that the opening degree can be controlled and the service life is longer.

Description

The constant force gate valve

Technical field

The utility model relates to valve technology field, especially relates to a kind of constant force gate valve.

Background technique

Gate valve refers to the valve that closure member (flashboard) moves along the Vertical direction of passage axis.Usually, this gate valve comprises valve body, and this valve body is provided with inner chamber, and this inner chamber two ends all are communicated with the mouth of a river.Also be bolted with the valve rod that is connected to power plant in this inner chamber, the bottom of this valve rod is fixed with cone.Like this, drive the upper and lower displacement in this inner chamber of this cone after this valve rod rotation, thereby make 2 mouths of a river block or be communicated with, and then reach the purpose of closing or open this gate valve.Although such gate valve is simple in structure, be easy to preparation, its uncontrollable unlatchings is big or small, only can standard-sized sheet or full cut-off, and this cone is easy to abrasion, shortened the working life of this gate valve.

The model utility content

The purpose of this utility model is to provide a kind of constant force gate valve, and it has to control opens size, and the characteristics of growing working life.

the technological scheme that the utility model adopts is: the constant force gate valve, comprise valve body, this valve body is provided with inner chamber, the two ends, left and right of this inner chamber all are communicated with the mouth of a river, the left and right sides of described inner chamber is provided with sealing surface, and be articulated with valve rod in this inner chamber, this valve rod is connected with power plant, simultaneously, the left and right sides of this inner chamber is equipped with non-rotatable Sealing, the outer surface of these 2 Sealings matches with these 2 sealing surfaces respectively, and be provided with stage clip between these 2 Sealings, between these 2 Sealings, non-rotatable clip has spool, and this spool and this valve rod threaded.

The inboard of one in described these 2 Sealings is provided with pilot hole, another inboard is provided with directional post, and this pilot hole and this directional post match.

The non-rotatable implementation of described Sealing is: the inner surface of sealing face and the outer surface of the seal all are plane.

The non-rotatable implementation of described spool is: the surface, the left and right sides of the inner surface of the seal and this spool all is plane.

The power plant that described valve rod connects are: the upper end of this valve rod is provided with handle.

The advantage that compared to the prior art the utility model has is: 1, can control and open size, and working life is longer.Constant force gate valve of the present utility model in use, valve rod rotation, and Sealing needn't rotate.That is, the irrotational upper and lower translation of the seal, thus the connection area at this inner chamber and the mouth of a river can be adjusted, this constant force gate valve can be adjusted open size.Simultaneously, due to the seal with sealing surface without relative rotation, thereby the friction both is less, makes the seal not fragile, has extended the working life of constant force gate valve.2, valve rod rotation internal thread is without opening and closing stroke, not only realized mechanical seal and the sealability but also the body size that have improved valve rod reduces.3, dam after closing the fully sealing of face relies on the pressure of medium own promote the Sealing of water inlet actinal surface and finally reach the good effect of closing by the exert pressure Sealing of water outlet of pilot hole and directional post by spring, this moment, valve rod can also 360 ° of rotations, last one power during without traditional gate valve switch, alleviated the dynamics of closing, but and the maintained switch dynamics evenly, thereby be suitable for supporting electric actuator.4, opening and closing are the straight-line displacement of Sealing, that is, the switch of this constant force gate valve is the slip between a valve seal smooth surface and smooth seal face of spool, thereby open and close is firmly less.5, avoided traditional valve core for gate valve and connection mouth to dam situation that hard pressure between face closes, thus further improved working life.

Description of drawings

Below in conjunction with drawings and Examples, the utility model is further illustrated:

Fig. 1 is embodiment's of the present utility model three-dimensional cutaway view;

Fig. 2 is that the master that embodiment's of the present utility model valve rod, spool, Sealing, sealing surface coordinates looks sectional view;

Fig. 3 is the three-dimensional cutaway view of spool of the present utility model.

In figure: 10, valve body, 11, inner chamber, 111, the mouth of a river, 12, sealing surface; 20, valve rod, 21, handle; 30, spool; 40, stage clip; 50, Sealing, 51, pilot hole, 52, directional post.

Embodiment

Embodiment, see that Fig. 1 is to shown in Figure 3: the constant force gate valve comprises valve body 10.This valve body 10 is provided with inner chamber 11, and the two ends, left and right of this inner chamber 11 all are communicated with the mouth of a river 111.That is, these 2 mouths of a river 111 are used for flowing to and the trickle medium.The left and right sides of this inner chamber 11 is equipped with sealing surface 12.Certainly, sealing face 12 can be one-body molded with this valve body 10, also can be fixed in this inner chamber 11 by modes such as screws.Be articulated with valve rod 20 in this inner chamber 11, this valve rod 20 is connected with power plant.That is, under the effect of these power plant, this valve rod 20 can rotate.Simultaneously, the left and right sides of this inner chamber 11 is equipped with non-rotatable Sealing 50, and the outer surface of these 2 Sealings 50 matches with these 2 sealing surfaces 12 respectively.What is called matches, and after the outer surface that refers to the inner surface of these 2 sealing surfaces 12 and these 2 Sealings 50 contacts, can seal preferably.Such as, the outer surface of the inner surface of these 2 sealing surfaces 12 and these 2 Sealings 50 all is all arc surface or all is all the plane.Be provided with stage clip 40 between these 2 Sealings 50.That is, under the effect of this stage clip 40, the outer surface of these 2 Sealings 50 contacts the inner surface of these 2 sealing surfaces 12 closely.Between these 2 Sealings 50, non-rotatable clip has spool 30, and these spool 30 and these valve rod 20 threaded.Like this, after these valve rod 20 rotations, because this spool 30 can't rotate, thereby the rotation of valve rod 20 is converted into the upper and lower displacement of this spool 30, thereby this spool 30 drives these 2 Sealing 50 upper and lower translations, thereby the connection area at this inner chamber 11 and this mouth of a river 111 is changed, and then can regulates this constant force gate valve and open size.Simultaneously, the relative displacement of above-below direction is only arranged between the seal 50 and sealing face 12, without rotation relatively, thereby the friction between the seal 50 and sealing face 12 is less, and is not fragile.

Optimize:

The inboard of one in these 2 Sealings 50 is provided with pilot hole 51, another inboard is provided with directional post 52, and this pilot hole 51 and this directional post 52 match.That is, this directional post 52 is inserted in corresponding pilot hole 51.Like this, kept the synchronous of these 2 Sealings, 50 actions.

The non-rotatable implementation of the seal 50 is: the outer surface of the inner surface of sealing face 12 and the seal 50 all is plane.The non-rotatable implementation of this spool 30 is: the surface, the left and right sides of the inner surface of the seal 50 and this spool 30 is plane.Obviously, such mode is comparatively simple, practical, and is easy to preparation.

Certainly, the power plant that connect of this valve rod 20 can for: the upper end of this valve rod 20 is provided with handle 21.

The above is only preferred embodiment of the present utility model; not thereby limit the scope of the claims of the present utility model; every equivalent structure or equivalent flow process conversion that utilizes the utility model specification and accompanying drawing content to do; or directly or indirectly be used in other relevant technical fields, all in like manner be included in scope of patent protection of the present utility model.

Claims

1. constant force gate valve, comprise valve body (10), this valve body (10) is provided with inner chamber (11), the two ends, left and right of this inner chamber (11) all are communicated with the mouth of a river (111), it is characterized in that: the left and right sides of described inner chamber (11) is provided with sealing surface (12), and be articulated with valve rod (20) in this inner chamber (11), this valve rod (20) is connected with power plant, simultaneously, the left and right sides of this inner chamber (11) is equipped with non-rotatable Sealing (50), the outer surface of these 2 Sealings (50) matches with these 2 sealing surfaces (12) respectively, and be provided with stage clip (40) between these 2 Sealings (50), between these 2 Sealings (50), non-rotatable clip has spool (30), and this spool (30) and this valve rod (20) threaded.

2. constant force gate valve according to claim 1, it is characterized in that: the inboard of in described these 2 Sealings (50) is provided with pilot hole (51), another inboard is provided with directional post (52), and this pilot hole (51) and this directional post (52) match.

3. constant force gate valve according to claim 1, it is characterized in that: the non-rotatable implementation of described Sealing (50) is: the outer surface of the inner surface of sealing face (12) and the seal (50) all is plane.

4. constant force gate valve according to claim 1, it is characterized in that: the non-rotatable implementation of described spool (30) is: the surface, the left and right sides of the inner surface of the seal (50) and this spool (30) all is plane.

5. the described constant force gate valve of any one according to claim 1 to 4 is characterized in that: the power plant that described valve rod (20) connects are: the upper end of this valve rod (20) is provided with handle (21).