Three-piece type high-performance fireproof ball valve

Abstract

The three-piece type high-performance fireproof ball valve comprises a valve body and a valve seat, a rotating cavity is formed in the valve body, valve covers are arranged at the two ends of the rotating cavity, the valve covers communicate with the rotating cavity, and a valve ball is arranged in the rotating cavity; the valve seat is arranged between the valve ball and the rotating cavity; wherein a positioning groove is formed in the position, corresponding to the valve seat, in the valve cover, the positioning groove is annularly arranged, the positioning groove is located in the peripheral position of the end, facing the valve body, of the valve cover, the valve seat is located in the positioning groove, and a fireproof boss is arranged in the position, facing the through cavity, of the positioning groove; by arranging the valve seat and the positioning groove, the valve seat is melted and burnt out in a fire state, so that the valve ball in the valve body moves towards the position of the positioning groove, and the valve ball is close to the fireproof boss of the valve cover, and a large amount of media are effectively prevented from leaking to the downstream end.

Description

Technical Field

[0001] This application relates to the field of ball valve structures, and particularly to a three-piece high-performance fireproof ball valve. Background Art

[0002] As a common fluid control device, ball valves are widely used in multiple industrial fields such as petrochemical, chemical, power, water treatment, and papermaking.

[0003] Traditional ball valves mainly consist of key components such as a ball, a valve seat, a valve stem, and an operating mechanism. The ball, as the closing element, is usually spherical in shape, with a passage formed in the middle. The on-off of the pipeline is controlled by rotating the ball. The valve seat is the positioning device for the ball, and the two form a seal on the contact surface to prevent medium leakage. The valve stem passes through the center of the ball, with one end connected to the ball and the other end connected to the operating mechanism. By rotating or pushing the operating mechanism, the ball is driven to rotate to achieve the opening and closing of the valve.

[0004] There is a valve seat made of rubber material between the spherical valve body inside the ball valve and the valve cavity. In traditional ball valves, the welding point connecting to the pipeline is relatively close to this valve seat. The high temperature and sparks generated during the welding process may cause the valve seat to melt, resulting in an impact on the use of the ball valve after the valve seat melts.

[0005] Therefore, how to avoid the impact of valve seat melting on the use of ball valves is an important technical problem that needs to be solved urgently at present. Summary of the Utility Model

[0006] To solve the problems existing in the prior art, the present utility model provides a three-piece high-performance fireproof ball valve. By providing a valve seat and a positioning groove, in the event of a fire, the valve seat melts and burns out, causing the position of the valve ball in the valve body facing the positioning groove to move, and the valve ball touches the fireproof boss of the valve cover, effectively preventing a large amount of medium from leaking to the downstream end.

[0007] The technical solutions adopted by the present utility model to solve the above technical problems are as follows:

[0008] This application provides a three-piece high-performance fireproof ball valve, including:

[0009] A valve body, in which a rotating cavity is provided. Valve covers are provided at both ends of the rotating cavity. The valve covers communicate with the rotating cavity, and a valve ball is provided in the rotating cavity;

[0010] A valve seat, provided between the valve ball and the rotating cavity;

[0011] Wherein, a positioning groove is opened at the position corresponding to the valve seat in the valve cover. The positioning groove is annularly arranged and is located around the end of the valve cover facing the valve body. The valve seat is located in the positioning groove.

[0012] Optionally, in some embodiments of the present application, a through cavity is provided on the valve cover, the through cavity communicates with the rotating cavity, and the positioning groove is annularly arranged around the through cavity;

[0013] A fireproof boss is provided at a position on the positioning groove facing the through cavity, the fireproof boss is a part of the through cavity, and a gap is formed between the fireproof boss and the valve ball, and the gap communicates with the through cavity.

[0014] Optionally, in some embodiments of the present application, a convex member is protruded at a position on the valve seat corresponding to the gap, the convex member is located in the gap, so that the fireproof boss abuts against the valve ball through the convex member;

[0015] The convex member and the valve seat are integrally provided.

[0016] Optionally, in some embodiments of the present application, a first connecting portion is provided on the valve cover corresponding to the valve body, a second connecting portion is provided on the valve body corresponding to the first connecting portion, and the first connecting portion and the second connecting portion are connected to connect the valve cover and the valve body to form a rotating cavity.

[0017] Optionally, in some embodiments of the present application, the first connecting portion is a connecting groove, the second connecting portion is a connecting boss, and when the connecting boss is located in the connecting groove, the valve body is connected to the valve cover.

[0018] Optionally, in some embodiments of the present application, a plurality of connecting holes are further provided on the valve cover, and the plurality of connecting holes are annularly arranged on the valve cover;

[0019] When the valve body is connected by the valve covers on both sides through the first connecting portion and the second connecting portion, the connecting holes connect the valve covers on both sides of the valve body through fixing bolts, so that the valve body is connected to the valve cover.

[0020] Compared with the prior art, the beneficial effects in the present utility model are as follows:

[0021] 1. In the present application, by providing a valve cover integrally connected to the valve body, it is possible to avoid the influence on the ball valve caused by the melting of the valve seat of the ball valve in a high-temperature environment during the welding process with the external connecting pipe. A fireproof boss is provided, which can prevent the melted valve seat from flowing into the valve cover quickly. And by providing a valve seat and a positioning groove, in the event of a fire, the valve seat melts and burns out, causing the valve ball in the valve body to move towards the positioning groove, and the valve ball abuts against the fireproof boss of the valve cover, effectively preventing a large amount of medium from leaking to the downstream end;

[0022] 2. A valve stem packing is also arranged in the rotating hole in the present application. The material of the valve stem packing is fireproof graphite material. When a fire breaks out in the environment around the valve body, the presence of the valve stem packing enables the valve stem to rotate normally, so that the valve ball can be effectively closed, preventing the fire source from leaking out through the valve body and achieving the purpose of fire prevention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0024] Figure 1 It is a schematic diagram of the overall structure of the three-piece high-performance fireproof ball valve provided by the embodiment of the present application;

[0025] Figure 2 It is a schematic diagram of the side sectional structure of the three-piece high-performance fireproof ball valve provided by the embodiment of the present application Figure 1 ;

[0026] Figure 3 It is Figure 2 a schematic diagram of the enlarged structure at A in

[0027] Figure 4 It is a schematic diagram of the side sectional structure of the three-piece high-performance fireproof ball valve provided by the embodiment of the present application Figure 2 .

[0028] DESCRIPTION OF THE REFERENCE NUMERALS:

[0029] 100, valve body; 110, rotating cavity; 111, rotating hole; 112, valve stem packing; 120, valve ball; 121, through hole; 122, limiting hole; 130, second connecting portion; 200, valve seat; 210, convex member; 300, valve cover; 310, through cavity; 320, fireproof boss; 330, positioning groove; 340, flange; 350, first connecting portion; 400, gap; 500, valve stem; 600, connecting bolt; 700, valve cover gasket. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the protection scope of the present application. It can be understood that the accompanying drawings are only for reference and illustration, and are not used to limit the present application. The connection relationships shown in the drawings are only for clear description and do not limit the connection methods.

[0031] Specifically, as Figure 1 shown, a three-piece high-performance fireproof ball valve is provided in the embodiment of the present application. The ball valve mainly includes a valve ball 120, a valve body 100, and a valve cover 300. The valve ball 120 is located in the rotation cavity 110 inside the valve body 100, and the opening and closing of the ball valve are controlled by the rotation of the valve ball 120. In the embodiment of the present application, the opening and closing of the ball valve are rotationally controlled by a valve stem 500. A rotation hole 111 is opened on the valve body 100 corresponding to the position of the valve stem 500. The valve stem 500 is located in the rotation hole 111 and is connected to the valve ball 120. A valve stem packing 112 is provided in the rotation hole 111. When the valve stem 500 rotates, the valve stem packing 112 can always maintain the tightness between the valve stem 500 and the rotation hole 111, and the valve stem packing 112 is mainly a graphite type of fireproof material. A limiting hole 122 is opened on the valve ball 120 corresponding to the position of the valve stem 500. One end of the valve stem 500 close to the valve ball 120 is located in the limiting hole 122, so that when the valve stem 500 rotates, the horizontal rotation of the valve stem 500 drives the valve ball 120 to rotate horizontally. During rotation, the direction of the through hole 121 on the valve ball 120 forms an angle with the water flow direction in the valve body 100, thereby controlling the water flow rate of the ball valve.

[0032] In the embodiment of the present application, a valve seat 200 is provided on the valve cover 300. The valve seat 200 is located at one end of the valve cover 300 close to the valve body 100 and is provided corresponding to the opening position of the valve body 100. Specifically,

[0033] as Figure 2 and Figure 3As shown in the figure, a rotating cavity 110 is provided on the valve body 100, and valve covers 300 are provided at both ends of the valve body 100. The valve covers 300 are connected to the rotating cavity 110. A positioning groove 330 is provided at one end of the valve cover 300 corresponding to the rotating cavity 110. The positioning groove 330 is annularly arranged. Specifically, an opening is provided at the position of the rotating cavity 110 corresponding to the valve cover 300, and the positioning groove 330 is arranged within the opening. A valve seat 200 is arranged within the positioning groove 330, such that the valve seat 200 abuts against the valve ball 120, preventing the valve ball 120 from directly contacting the valve cover 300, thus avoiding wear on the valve ball 120 and the valve cover 300. Additionally, the arrangement of the positioning groove 330 facilitates the matching of the valve cover 300 with the valve body 100, and facilitates the installation between the valve cover 300 and the valve body 100.

[0034] Among them, a through cavity 310 is provided on the valve cover 300. The through cavity 310 communicates with the rotating cavity 110 through the opening. A fireproof boss 320 is provided at a position on the positioning groove 330 facing the through cavity 310. The fireproof boss 320 is a part of the through cavity 310, and a gap 400 is formed between the fireproof boss 320 and the valve ball 120. The formation of this gap 400 can prevent the valve cover 300 from directly contacting the valve ball 120 and causing wear to the valve cover 300 or the valve ball 120.

[0035] Among them, to further prevent the occurrence of such wear, in the embodiment of the present application, a convex part 210 is provided at the gap 400. The convex part 210 is a part of the valve seat 200. When a gap 400 is generated between the valve cover 300 and the valve ball 120, the convex part 210 is located within the gap 400, such that the fireproof boss 320 cannot directly contact the valve ball 120, thereby preventing wear of the valve ball 120 or the valve cover 300.

[0036] Moreover, in the embodiment of the present application, the size of the gap 400 is much smaller than the size of the valve seat 200. When the valve body 100 is in a high-temperature state and causes the valve seat 200 to melt, the melted valve seat 200 will not flow into the rotating cavity 110 in large quantities from the gap 400, preventing the melted sealing ring from quickly entering the rotating cavity 110. At the same time, after melting, the rotating valve rod 500 is rotated, and the valve rod 500 drives the valve ball 120 to rotate, causing the valve body 100 to close. At this time, since the valve seat 200 will melt, resulting in the generation of the gap 400, as Figure 4 shown, in the closed state of the valve body 100, the valve ball 120 will move towards the gap 400, and the valve ball 120 will abut against the fireproof boss 320 of the valve cover 300, effectively preventing a large amount of medium from leaking to the downstream end. Thus, the valve body 100 is blocked through the gap 400, completing the disconnection process of the valve body 100 and achieving the purpose of fire prevention.

[0037] In the embodiment of the present application, the valve seat 200 is made of rubber material.

[0038] In the embodiment of the present application, there are two valve covers 300, and both of the two valve covers 300 are arranged corresponding to the opening positions.

[0039] More specifically, in another embodiment of the present application, that is, in the second embodiment, a flange 340 is provided on the valve cover 300. The flange 340 is arranged on the valve cover 300 at a position facing the rotating cavity 110, and connection holes are formed on the flanges 340 at both ends. There are multiple connection holes, and the multiple connection holes are arranged in a ring shape. The connection holes on the valve covers 300 on both sides of the valve body 100 correspond to each other one by one. When connecting the valve cover 300 and the valve body 100, the flanges 340 on the valve covers 300 on both sides of the valve body 100 are fixed by connection bolts 600, strengthening the overall connection strength between the valve cover 300 and the valve body 100.

[0040] In order to connect the valve cover 300 and the valve body 100 more accurately, in the embodiment of the present application, a first connection portion 350 is provided on the valve cover 300 at a position corresponding to the valve body 100, and a second connection portion 130 is provided on the valve body 100 at a position corresponding to the first connection portion 350. When the valve cover 300 and the valve body 100 are connected, the first connection portion 350 and the second connection portion 130 cooperate with each other, enabling the valve cover 300 and the valve body 100 to be tightly connected to form a rotating cavity 110.

[0041] In the embodiment of the present application, as Figure 3 shown, the first connection portion 350 is set as a connection groove, and the second connection portion 130 is set as a connection boss. When the connection boss is located in the connection groove, the valve body 100 and the valve cover 300 are connected, enabling the valve body 100 and the valve cover 300 to be correctly docked. At the same time, a valve cover gasket 700 is also provided between the connection groove and the connection boss. Both sides of the valve cover gasket 700 are abutted against the connection groove and the connection boss, enabling the valve cover 300 and the valve body 100 to be tightly fitted.

[0042] The above embodiments are only used to illustrate the technical method of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical method of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical method of the present invention.

Claims

1. A three-piece high-performance fireproof ball valve, characterized in that, Comprising: A valve body, a rotating cavity is arranged inside the valve body, valve covers are arranged at both ends of the rotating cavity, the valve covers communicate with the rotating cavity, and a valve ball is arranged inside the rotating cavity; A valve seat, arranged between the valve ball and the rotating cavity; Wherein, a positioning groove is formed at a position corresponding to the valve seat inside the valve cover, the positioning groove is annularly arranged, and the positioning groove is located around the end of the valve cover facing the valve body, and the valve seat is located in the positioning groove.

2. The three-piece high-performance fireproof ball valve according to claim 1, characterized in that A through cavity is formed in the valve cover, the through cavity communicates with the rotating cavity, and the positioning groove is annularly arranged around the through cavity; A fireproof boss is formed at a position of the positioning groove facing the through cavity, the fireproof boss is a part of the through cavity, and a gap is formed between the fireproof boss and the valve ball, and the gap communicates with the through cavity.

3. The three-piece high-performance fireproof ball valve according to claim 2, characterized in that, A convex part protrudes from a position of the valve seat corresponding to the gap, the convex part is located in the gap, so that the fireproof boss abuts against the valve ball through the convex part; The convex part and the valve seat are integrally arranged.

4. A three-piece high-performance fireproof ball valve according to claim 1, characterized in that, A first connection part is arranged at a position of the valve cover corresponding to the valve body, a second connection part is arranged at a position of the valve body corresponding to the first connection part, and the first connection part and the second connection part are connected to connect the valve cover and the valve body to form a rotating cavity.

5. The three-piece high-performance fireproof ball valve according to claim 4, wherein, The first connection part is a connection groove, the second connection part is a connection convex platform, and when the connection convex platform is located in the connection groove, the valve body is connected to the valve cover.

6. A three-piece high-performance fireproof ball valve according to claim 5, characterized in that A plurality of connection holes are further arranged on the valve cover, and the plurality of connection holes are annularly arranged on the valve cover; When the valve body is connected by the valve covers on both sides through the first connection part and the second connection part, the connection holes connect the valve covers on both sides of the valve body through fixing bolts, so that the valve body is connected to the valve cover.

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