CN221921999U - Elastic Seat Gas Gate Valve - Google Patents

Abstract

The utility model discloses an elastic seat seal gas gate valve, including a valve body, an inlet flow channel and an outlet flow channel are formed on the valve body, a connecting hole is formed between the inlet flow channel and the outlet flow channel, and a sealing member pressed at the connecting hole and a driving member driving the sealing member to move up and down are provided on the valve body. The utility model has an ingenious and reasonable structural design, can perform double anti-leakage sealing on gas, has a good sealing effect, will not leak during long-term use, and is worthy of promotion and application.

Description

Elastic Seat Gas Gate Valve

Technical Field

The utility model relates to a valve, in particular to a high-sealing gate valve, particularly to an elastic seat-sealed gas gate valve.

Background Art

The gas gate valve is a device used to open and close pipeline passages or adjust the flow of media in the pipeline. It is the main shut-off device and regulating device on the gas pipeline. Therefore, it must be safe, reliable and durable. It must be able to ensure tightness and no leakage when it needs to be closed during production operations. During maintenance, it must cut off the gas source and ensure that there is no possibility of leakage to the gas-stopped side. It must also be wear-resistant and corrosion-resistant to ensure a long service life. However, the existing gas gate valve has design defects. The contact surface between the bottom surface of the valve disc and the lateral flow channel is flat. In this way, when used for a long time, the valve disc will be deformed by the high-pressure impact when the gas pipeline is frequently closed using the valve disc, resulting in the inability to cut off the gas in the pipeline.

Chinese utility model patent CN 214305377 U discloses a dustproof flange gas gate valve, which includes a valve body, a valve cover and a protective gland connected in sequence from bottom to top, a valve stem is longitudinally arranged at the center position of the inner part of the valve body; a thrust ring is arranged inside the valve cover and is sleeved on the valve stem for limiting the push-up position of the valve stem; the top of the valve stem passes through the protective gland and is connected with a rotating hand wheel; sleeves communicating with the inner cavity of the valve body are arranged horizontally on the left and right sides of the valve body, and connecting flanges are arranged at the left and right ends of the sleeves; a gate plate capable of lifting and lowering is threadedly mounted on the bottom end of the valve stem, guide grooves are respectively arranged at both ends of the inner side wall of the valve body, and a guide convex block sliding with the guide groove is arranged on the side wall of the gate plate; an annular sealing protrusion is sleeved on the valve stem below the thrust ring, a rubber convex ring for sealing with the annular sealing protrusion when the gate valve is fully opened is fixedly arranged on the top of the gate plate, and a sealing groove is arranged inside the valve cover for matching with the rubber convex ring when the gate valve is fully opened. This type of gas gate valve is a situation where the contact surface between the bottom surface of the valve disc and the lateral flow channel is in a straight state. After a long period of use, the valve disc will be deformed, and thus a good sealing effect cannot be achieved.

Utility Model Content

The utility model aims to solve the above-mentioned shortcomings of the prior art and provide an elastic seat seal gas gate valve which can be safely sealed and used for a long time without leakage, thereby meeting the needs of users for safe use.

The utility model adopts a technical solution to solve the technical problem: the elastic seat seal gas gate valve comprises a valve body, an inlet flow channel and an outlet flow channel are provided on the valve body, a connecting hole is provided between the inlet flow channel and the outlet flow channel, a sealing member pressed at the connecting hole and a driving member driving the sealing member to move up and down are provided on the valve body; the sealing member comprises a cylindrical block, a plug-in channel is provided on the valve body, the plug-in channel and the cylindrical block are plug-fitted together, a sphere with a cross-section smaller than that of the cylindrical block is fixed on the bottom surface of the cylindrical block, installation grooves are provided on the contour surface of the sphere and the bottom and side surfaces of the cylindrical block, and a sealing block made of elastic rubber material is fixed on the installation groove A first sealing surface and a second sealing surface are provided on the sealing block, and the shape of the communicating hole matches the shape of the sealing block; the driving member includes a rotating shaft, a ring-shaped groove is provided on the rotating shaft, a circular ring plate matching the ring-shaped groove is fixed on the valve body, a threaded channel is provided on the rotating shaft, a threaded rod is threadedly connected to the threaded channel, a rotation-stopping plane is provided on the threaded rod, a horizontal plate is fixed in the valve body, a through hole is provided on the horizontal plate for the screw to pass through, a rotation-stopping block matching the rotation-stopping plane is fixed on the through hole, and a turntable is fixed on the top of the rotating shaft; a push rod is fixed on the top of the cylindrical block, the threaded rod is fixed to the top of the push rod, and the shape of the communicating hole matches the shape of the sealing block. Here, the valve body, inlet flow channel, outlet flow channel, connecting hole and seal function to seal the gate valve; here, the driving member functions to move the seal up and down, so as to conveniently control the seal to move down and block and squeeze the connecting hole to seal, with good sealing effect and long-term use without leakage; here, the working principle of the seal: the driving member is used to press down the cylindrical block, so that the cylindrical block moves in the plug-in channel, and finally the sealing block is elastically pressed on the connecting hole, and the second sealing surface is also elastically pressed on the plane next to the connecting hole (playing the role of secondary sealing). When the sealing block is pressed tightly on the connecting hole, there is still a part of the cylindrical block Plug in at the plug-in channel, so that the cylindrical block has a strong effect of resisting lateral impact of the medium, the cylindrical block will not deform or shift, so that the sealing block can be accurately matched with the upper connecting hole for a long time (as shown in Figure 5); the working principle of the driving part here: drive the turntable to rotate, thereby driving the rotating shaft to rotate, the rotating shaft can only rotate through the limit of the circular ring plate, and cannot move up or down, so the rotation of the rotating shaft will drive the threaded rod to move up or down (because the threaded rod has a rotation-stopping plane and is prevented from being driven by the rotating shaft to rotate together through the rotation-stopping block on the horizontal plate), so the up or down movement of the threaded rod will synchronously drive the push rod to move up or down, thereby driving the cylindrical block to move up or down, and then controlling the opening and closing operation of the connecting hole.

Further improvement, the top and bottom surfaces of the circular ring plate are both provided with a first self-lubricating layer. The function of the first self-lubricating layer is to reduce the friction resistance when the shaft rotates, and to make the rotation easier; the first self-lubricating layer is made of tin bronze material.

Further improvement, a second self-lubricating layer is provided at the plug-in channel. The function of the second self-lubricating layer is to make the cylindrical block move up and down more smoothly with less resistance to avoid jamming; the second self-lubricating layer is made of tin bronze material.

Further improvement, both the left and right ends of the valve body are provided with threaded installation ports. The function of the threaded installation ports here is to facilitate the installation of the gas pipeline.

The beneficial effects of the utility model are:

1). The connecting hole is elastically sealed by longitudinally extruding the sealing block, and the connecting hole is spherical, with a large contact area and good sealing effect. The second sealing surface can be used for secondary sealing, which has a better sealing effect;

2). The cylindrical block can guide the sealing block to move up and down, which can resist the lateral pressure of the medium. When the sealing block is pressed against the connecting hole, the cylindrical block is still plugged into the plug-in channel, so the cylindrical block can always resist the lateral pressure of the medium when it moves from top to bottom, thereby ensuring that the sealing gasket can always accurately align with the connecting hole for sealing;

3). As long as the turntable is rotated and the shaft is driven to rotate, the threaded rod can be driven to move up and down, thereby driving the cylindrical block to move up and down, and then the elastic seat can seal the connecting hole by extrusion. Therefore, the cylindrical block moves up and down instead of rotating up and down, which makes the friction resistance smaller when the cylindrical block moves, and is more conducive to the sealing block to extrude the elasticity to seal the connecting hole.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 is a schematic diagram of the structure of the utility model;

FIG2 is a partial enlarged view of the A area of FIG1 ;

FIG3 is a partial enlarged view of area B of FIG1 ;

Fig. 4 is a cross-sectional view taken along line C-C of Fig. 3;

FIG5 is a flow chart of the working principle of the utility model.

Explanation of the reference numerals: valve body 1, inlet flow channel 1-1, outlet flow channel 1-2, connecting hole 1-3, threaded mounting port 1a, sealing member 2, cylindrical block 2-1, sphere 2-1a, plug-in channel 2-2, mounting groove 2-3, sealing block 2-4, driving member 3, rotating shaft 3-1, annular groove 3-1a, threaded channel 3-1b, annular plate 3-2, self-lubricating layer 3-2a, threaded rod 3-3, anti-rotation plane 3-3a, cross plate 3-4, through hole 3-4a, anti-rotation block 3-4b, turntable 3-5, push rod 4, first sealing surface 2-4a, second sealing surface 2-4b.

DETAILED DESCRIPTION

The utility model is further described below in conjunction with the accompanying drawings:

Referring to the accompanying drawings: This elastic seat seal gas gate valve includes a valve body 1, an inlet flow channel 1-1 and an outlet flow channel 1-2 are opened on the valve body 1, a connecting hole 1-3 is arranged between the inlet flow channel 1-1 and the outlet flow channel 1-2, a sealing member 2 pressed at the connecting hole 1-3 and a driving member 3 driving the sealing member 2 to move up and down are arranged on the valve body 1; the sealing member 2 includes a cylindrical block 2-1, a plug-in channel 2-2 is opened on the valve body 1, the plug-in channel 2-2 is plugged and matched with the cylindrical block 2-1, a sphere 2-1a with a cross-section smaller than that of the cylindrical block 2-1 is fixed on the bottom surface of the cylindrical block 2-1, an installation groove 2-3 is arranged on the contour surface of the sphere 2-1a and the bottom and side surfaces of the cylindrical block 2-1, a sealing block 2-4 made of elastic rubber material is fixed at the installation groove 2-3, and a first sealing surface 2-4a and a second sealing surface 2-4a are arranged on the sealing block 2-4 4b, the shape of the connecting hole 1-3 matches the shape of the sealing block 2-4; the driving member 3 includes a rotating shaft 3-1, a circular groove 3-1a is formed on the rotating shaft 3-1, a circular ring plate 3-2 matching the circular groove 3-1a is fixed on the valve body 1, a threaded channel 3-1a is formed on the rotating shaft 3-1, a threaded rod 3-3 is threadedly connected to the threaded channel 3-1a, a rotation-stopping plane 3-3a is provided on the threaded rod 3-3, a transverse plate 3-4 is fixed in the valve body 1, a through hole 3-4a for the threaded rod 3-3 to pass through is formed on the transverse plate 3-4, a rotation-stopping block 3-4b matching the rotation-stopping plane 3-3a is fixed on the through hole 3-4a, a turntable 3-5 is fixed on the top of the rotating shaft 3-1; a push rod 4 is fixed on the top of the cylindrical block 2-1, and the threaded rod 3-3 is fixed on the top of the push rod 4; the shape of the connecting hole 1-3 matches the shape of the sealing block 2-4.

The top surface and the bottom surface of the annular plate 3-2 are both provided with a first self-lubricating layer 3-2a.

A second self-lubricating layer 2-2a is provided at the plug-in channel 2-2.

The left and right ends of the valve body 1 are both provided with threaded mounting openings 1a.

The working principle of the utility model is as follows: when the gas gate valve needs to be closed, it is only necessary to drive the turntable 3-5 to rotate, thereby driving the shaft 3-1 to rotate. The shaft 3-1 can only rotate through the limit of the annular plate 3-2, and cannot move up or down. Therefore, the rotation of the shaft 3-1 will drive the threaded rod 3-1 to move up or down (because the threaded rod 3-1 has a rotation-stopping plane 3-3a and is prevented from being driven by the shaft 3-1 to rotate together through the rotation-stopping block 3-4b on the cross plate 3-4). Therefore, the downward movement of the threaded rod 3-1 will synchronously drive the push rod 4 to move downward, thereby driving the cylindrical block 2-1 to move downward, so that the cylindrical block 2-1 moves in the plug-in channel 2-2, and finally the sealing block 2-4 is elastically pressed on the connecting hole 1-3, and the second The sealing surface 2-4b is also elastically pressed on the plane next to the connecting hole 1-3 (playing the role of secondary sealing). When the sealing block 2-4 is pressed against the connecting hole 1-3, part of the cylindrical block 2-1 is plugged into the plug-in channel 2-2, so that the cylindrical block 2-1 has a strong resistance to lateral impact of the medium, and the cylindrical block 2-1 will not deform or shift. Therefore, during long-term use, the seal 2-4 can be accurately matched with the connecting hole 1-3 (as shown in Figure 5), thereby avoiding leakage after a long time compared to traditional gas gate valves. The structural design of the utility model is ingenious and reasonable, and can perform double leakage-proof sealing on gas, with good sealing effect and no leakage during long-term use, which is worthy of promotion and application.

Although the present invention has been shown and described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein within the scope of the claims.

Claims (4)

1. An elastic seat seal gas gate valve, comprising a valve body (1), characterized in that: the valve body (1) is provided with an inlet flow channel (1-1) and an outlet flow channel (1-2), a communication hole (1-3) is provided between the inlet flow channel (1-1) and the outlet flow channel (1-2), the valve body (1) is provided with a sealing member (2) pressed against the communication hole (1-3) and a driving member (3) driving the sealing member (2) to move up and down; The sealing member (2) comprises a cylindrical block (2-1), the valve body (1) is provided with a plug-in channel (2-2), the plug-in channel (2-2) and the cylindrical block (2-1) are plugged together, a sphere (2-1a) having a smaller cross-section than the cylindrical block (2-1) is fixed to the bottom surface of the cylindrical block (2-1), a mounting groove (2-3) is provided on the contour surface of the sphere (2-1a) and the bottom surface and side surface of the cylindrical block (2-1), a sealing block (2-4) is fixed to the mounting groove (2-3), and the shape of the connecting hole (1-3) matches the shape of the sealing block (2-4); The driving member (3) comprises a rotating shaft (3-1), the rotating shaft (3-1) is provided with a ring-shaped notch (3-1a), a circular ring plate (3-2) cooperating with the ring-shaped notch (3-1a) is fixed on the valve body (1), a threaded channel (3-1b) is provided on the rotating shaft (3-1), a threaded rod (3-3) is threadedly connected to the threaded channel (3-1b), a rotation-stopping plane (3-3a) is provided on the threaded rod (3-3), a transverse plate (3-4) is fixed inside the valve body (1), a through hole (3-4a) is provided on the transverse plate (3-4) for the threaded rod (3-3) to pass through, a rotation-stopping block (3-4b) cooperating with the rotation-stopping plane (3-3a) is fixed on the through hole (3-4a), and a rotating disk (3-5) is fixed to the top end of the rotating shaft (3-1); A push rod (4) is fixed to the top end of the cylindrical block (2-1), and the threaded rod (3-3) is fixed to the top end of the push rod (4). 2. The elastic seat seal gas gate valve according to claim 1, characterized in that: the top surface and the bottom surface of the annular plate (3-2) are both provided with a first self-lubricating layer (3-2a). 3. The elastic seat seal gas gate valve according to claim 1, characterized in that: a second self-lubricating layer (2-2a) is provided at the plug-in channel (2-2). 4. The elastic seat seal gas gate valve according to claim 1, characterized in that: both the left and right ends of the valve body (1) are provided with threaded installation openings (1a).