Ball valve with fireproof function

Abstract

The ball valve with the fireproof function comprises a valve body, a valve cover, a ball body, a valve rod and a transmission mechanism, the valve body is fixedly connected with the valve cover, the ball body is arranged in a valve cavity formed between the valve body and the valve cover, the lower end of the valve rod is detachably connected with the ball body, and the transmission mechanism is arranged in the valve cavity. The upper end of the valve rod penetrates through a shaft hole in the valve body and is fixedly connected with the transmission mechanism, and a square fluid channel is formed in the ball body. The fireproof structure is fixedly mounted on the upper wall of the square fluid channel; the fireproof structure comprises first fireproof plates, second fireproof plates, springs and a sealing layer, the first fireproof plates are arranged in pairs, the second fireproof plates are clamped between the first fireproof plates, the upper ends of the springs are fixedly connected with the upper wall of the square fluid channel, and the lower ends of the springs are fixedly connected with the second fireproof plates; the sealing layer is used for sealing the second fireproof plate between the two first fireproof plates; the structure is simple, and the cost is low.

Description

Technical Field

[0001] This utility model relates to the field of ball valve technology, and in particular to a ball valve with fireproof function. Background Technology

[0002] Ball valves are among the most widely used valves in media pipelines across various fields due to their simple structure, convenient opening and closing, and low flow resistance. The structure of a ball valve generally includes a valve body, valve cover, ball, valve stem, valve seat, and transmission mechanism. The valve body and valve cover have flow channels of the same diameter and are fixed together by bolts and nuts, forming a valve cavity. A sealing ring is installed between the contacting end faces of the valve body and valve cover to achieve end-face sealing. The ball is installed in the valve cavity and mates with the valve seat to form a sealing pair. A square hole at the upper end of the ball connects to the square shaft at the lower end of the valve stem. The upper end of the valve stem passes through the valve body shaft hole and connects to the transmission mechanism. Sealing packing is installed between the valve body shaft hole and the valve stem to achieve cavity sealing between the valve stem and the valve body.

[0003] Currently, the main way to improve the fire resistance of ball valves is by using new materials, which has high research and development costs and operating costs. In addition, it is difficult to close the valve manually in a fire scenario.

[0004] Therefore, a ball valve with fireproof function can solve the above problems. Utility Model Content

[0005] The technical problem this utility model aims to solve is that currently, the main way to improve the fire resistance of ball valves is by using new materials, which has high research and development and usage costs. Furthermore, in a fire scenario, it is difficult to manually close the valve. Therefore, this utility model provides a ball valve with fire-resistant functionality, which includes:

[0006] The valve body comprises a valve cover, a ball, a valve stem, and a transmission mechanism. The valve body and the valve cover are fixedly connected. The ball is disposed in the valve cavity formed between the valve body and the valve cover. The lower end of the valve stem is detachably connected to the ball. The upper end of the valve stem passes through the shaft hole on the valve body and is fixedly connected to the transmission mechanism. The ball is provided with a square fluid channel.

[0007] It also includes a fireproof structure, which is fixedly installed on the upper wall of the square fluid channel; the fireproof structure includes a first fireproof plate, a second fireproof plate, a spring and a sealing layer, the first fireproof plates are arranged in pairs, with the second fireproof plate sandwiched in the middle, the upper end of the spring is fixedly connected to the upper wall of the square fluid channel, the lower end of the spring is fixedly connected to the second fireproof plate, and the sealing layer is used to seal the second fireproof plate between the two first fireproof plates.

[0008] Furthermore, a convex block is provided between the valve stem and the ball, the lower end of the convex block is detachably connected to the ball, and the upper end of the convex block is fixedly connected to the valve stem.

[0009] Furthermore, it also includes a pressure cap, which is disposed at the upper end of the shaft hole and is used to fill the space between the valve stem and the side wall of the shaft hole.

[0010] Furthermore, a sealing packing is also provided between the valve stem and the side wall of the shaft hole at the lower end of the gland.

[0011] Furthermore, the transmission mechanism is a rotary handle.

[0012] Furthermore, a wedge-shaped groove is provided in the end face of the valve body and the valve cover facing each other, and a wedge-shaped ring is provided in the wedge-shaped groove to cooperate with it. The wedge-shaped ring and the wedge-shaped groove are fixedly connected by bolts and nuts.

[0013] Furthermore, both the first fire-resistant board and the second fire-resistant board are glass wool boards.

[0014] Furthermore, the sealing layer is a polypropylene board, and the polypropylene board is fixedly connected to the first fire-resistant board.

[0015] Implementing this utility model has the following beneficial effects:

[0016] 1. This application has a simple structure and low cost. In the event of a fire, after the sealing layer melts, the second fireproof plate is pushed out by the spring, which can close the pipe in a short time and play a certain role in preventing combustion. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the ball valve with fireproof function according to this utility model;

[0018] Figure 2 This is a schematic diagram of the fire-prevention mechanism of this utility model;

[0019] The corresponding reference numerals in the attached drawings are: 1-valve body, 2-valve cover, 3-ball, 4-valve stem, 5-convex block, 6-pressure cover, 7-rotating handle, 8-first fireproof plate, 9-spring, 10-second fireproof plate, 11-sealing layer. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0021] Please refer to the instruction manual appendix. Figure 1-2 This embodiment provides a ball valve with fireproof function, the ball valve with fireproof function includes:

[0022] The valve body 1, valve cover 2, ball 3, valve stem 4 and transmission mechanism are fixedly connected. The ball 3 is set in the valve cavity formed between the valve body 1 and the valve cover 2. The lower end of the valve stem 4 is detachably connected to the ball 3. The upper end of the valve stem 4 passes through the shaft hole on the valve body 1 and is fixedly connected to the transmission mechanism. A square fluid channel is provided on the ball 3.

[0023] It also includes a fireproof structure, which is fixedly installed on the upper wall of the square fluid channel. The fireproof structure includes a first fireproof plate 8, a second fireproof plate 10, a spring 9, and a sealing layer 11. The first fireproof plates 8 are arranged in pairs, with the second fireproof plate 10 sandwiched in the middle. The upper end of the spring 9 is fixedly connected to the upper wall of the square fluid channel, and the lower end of the spring 9 is fixedly connected to the second fireproof plate 10. The sealing layer 11 is used to seal the second fireproof plate 10 between the two first fireproof plates 8.

[0024] A convex block 5 is provided between the valve stem 4 and the ball 3. The lower end of the convex block 5 is detachably connected to the ball 3, and the upper end of the convex block 5 is fixedly connected to the valve stem 4.

[0025] It also includes a pressure cap 6, which is located at the upper end of the shaft hole and is used to fill the space between the valve stem 4 and the side wall of the shaft hole.

[0026] A sealing packing is also provided between the valve stem 4 at the lower end of the gland 6 and the side wall of the shaft hole.

[0027] The transmission mechanism is a rotating handle 7.

[0028] The valve body 1 and the valve cover 2 are provided with wedge-shaped grooves on their opposite end faces. A wedge-shaped ring is provided in the wedge-shaped groove to cooperate with it. The wedge-shaped ring and the wedge-shaped groove are fixedly connected by bolts and nuts.

[0029] In the event of a fire, the polypropylene board will melt due to the increased temperature. Under normal circumstances, the spring is in a compressed state. At this time, the spring is released, and the second fireproof board is put down, completely blocking the fluid channel and playing a certain role in preventing the spread of fire. The structure is very simple and effective. Example

[0030] Please refer to the instruction manual appendix. Figure 1-2 This embodiment provides a ball valve with fireproof function, the ball valve with fireproof function includes:

[0031] The valve body 1, valve cover 2, ball 3, valve stem 4 and transmission mechanism are fixedly connected. The ball 3 is set in the valve cavity formed between the valve body 1 and the valve cover 2. The lower end of the valve stem 4 is detachably connected to the ball 3. The upper end of the valve stem 4 passes through the shaft hole on the valve body 1 and is fixedly connected to the transmission mechanism. A square fluid channel is provided on the ball 3.

[0032] It also includes a fireproof structure, which is fixedly installed on the upper wall of the square fluid channel. The fireproof structure includes a first fireproof plate 8, a second fireproof plate 10, a spring 9, and a sealing layer 11. The first fireproof plates 8 are arranged in pairs, with the second fireproof plate 10 sandwiched in the middle. The upper end of the spring 9 is fixedly connected to the upper wall of the square fluid channel, and the lower end of the spring 9 is fixedly connected to the second fireproof plate 10. The sealing layer 11 is used to seal the second fireproof plate 10 between the two first fireproof plates 8.

[0033] A convex block 5 is provided between the valve stem 4 and the ball 3. The lower end of the convex block 5 is detachably connected to the ball 3, and the upper end of the convex block 5 is fixedly connected to the valve stem 4.

[0034] It also includes a pressure cap 6, which is located at the upper end of the shaft hole and is used to fill the space between the valve stem 4 and the side wall of the shaft hole.

[0035] A sealing packing is also provided between the valve stem 4 at the lower end of the gland 6 and the side wall of the shaft hole.

[0036] The transmission mechanism is a rotating handle 7.

[0037] The valve body 1 and the valve cover 2 are provided with wedge-shaped grooves on their opposite end faces. A wedge-shaped ring is provided in the wedge-shaped groove to cooperate with it. The wedge-shaped ring and the wedge-shaped groove are fixedly connected by bolts and nuts.

[0038] Both the first and second fire-resistant boards are made of glass wool.

[0039] The sealing layer 11 is a polypropylene board, which is fixedly connected to the first fire-resistant board.

[0040] In the event of a fire, the polypropylene board will melt due to the increased temperature. Under normal circumstances, the spring is in a compressed state. At this time, the spring is released, and the second fireproof board is put down, completely blocking the fluid channel and playing a certain role in preventing the spread of fire. The structure is very simple and effective.

[0041] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0042] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0043] Although 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 alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A ball valve with fire-resistant function, characterized in that, The valve includes a valve body, a valve cover, a ball, a valve stem, and a transmission mechanism. The valve body and the valve cover are fixedly connected. The ball is disposed in the valve cavity formed between the valve body and the valve cover. The lower end of the valve stem is detachably connected to the ball. The upper end of the valve stem passes through the shaft hole on the valve body and is fixedly connected to the transmission mechanism. The ball is provided with a square fluid channel. It also includes a fireproof structure, which is fixedly installed on the upper wall of the square fluid channel; the fireproof structure includes a first fireproof plate, a second fireproof plate, a spring and a sealing layer, the first fireproof plates are arranged in pairs, with the second fireproof plate sandwiched in the middle, the upper end of the spring is fixedly connected to the upper wall of the square fluid channel, the lower end of the spring is fixedly connected to the second fireproof plate, and the sealing layer is used to seal the second fireproof plate between the two first fireproof plates.

2. The ball valve with fireproof function according to claim 1, characterized in that, A convex block is provided between the valve stem and the ball. The lower end of the convex block is detachably connected to the ball, and the upper end of the convex block is fixedly connected to the valve stem.

3. The ball valve with fireproof function according to claim 2, characterized in that, It also includes a pressure cap, which is disposed at the upper end of the shaft hole and is used to fill the space between the valve stem and the side wall of the shaft hole.

4. The ball valve with fireproof function according to claim 3, characterized in that, A sealing filler is also provided between the valve stem and the side wall of the shaft hole at the lower end of the gland.

5. The ball valve with fireproof function according to claim 4, characterized in that, The transmission mechanism is a rotary handle.

6. The ball valve with fireproof function according to claim 5, characterized in that, The valve body and valve cover have wedge-shaped grooves on their opposite end faces. A wedge-shaped ring is provided in the wedge-shaped groove to cooperate with it. The wedge-shaped ring and the wedge-shaped groove are fixedly connected by bolts and nuts.

7. The ball valve with fireproof function according to claim 6, characterized in that, Both the first fireproof board and the second fireproof board are glass wool boards.

8. The ball valve with fireproof function according to claim 7, characterized in that, The sealing layer is a polypropylene board, and the polypropylene board is fixedly connected to the first fireproof board.

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