Improved flange butterfly valve body casting

Abstract

The utility model discloses an improved flange butterfly valve body casting which comprises a valve body and a connecting pipe, the water inlet end and the water outlet end of the valve body are respectively provided with a first flange plate, and the outer wall of one side of each first flange plate is provided with a first annular installation groove; a second flange plate is arranged on the circumferential outer wall of one end of the connecting pipe, and a second annular mounting groove is formed in the outer wall of one side of the second flange plate; an annular expansion water stop strip is arranged between the inner side of the first annular mounting groove and the inner side of the second annular mounting groove; first mounting holes and second mounting holes are formed in the two sides of the circumferential outer walls of the first flange plate and the second flange plate correspondingly, and extrusion balls are arranged in the first mounting holes. According to the utility model, not only can an automatic sealing effect be achieved when leakage occurs between the first flange plate and the second flange plate, but also a leakage detection effect can be achieved at the joint between the first flange plate and the second flange plate.

Description

Technical Field

[0001] This utility model relates to the technical field of flange butterfly valve body castings, specifically an improved flange butterfly valve body casting. Background Technology

[0002] A flanged butterfly valve is a type of valve used to control the flow of fluids. It controls the flow rate of the medium in a pipeline by rotating the valve plate. It is mainly used in water supply and drainage, metallurgy, energy systems, and light textile industries.

[0003] A search revealed that patent publication number CN220581778U discloses a corrosion-resistant gate valve body casting, comprising a valve body, a turntable on the upper side of the valve body, a first connecting plate on the left side of the valve body, first fixing holes symmetrically opened on the front and rear sides of the left side of the first connecting plate, a first flange on the right side of the valve body, and limit holes symmetrically opened on the upper and lower sides of the left side of the valve body. By setting a cleaning component on the corrosion-resistant gate valve body casting, a drive motor can drive a crushing screw to rotate. When the crushing screw rotates, it can crush larger impurities, thereby preventing impurity accumulation and allowing water to flow normally. Furthermore, the connecting pipe can be disassembled through the first and second connecting plates, making it convenient to repair when the crushing screw is damaged. The device is more convenient to use, with a simple overall structure, easy operation, and higher practicality.

[0004] Currently, the connection between the flange butterfly valve and the connecting pipe is achieved through a flange assembly. The flange assembly connection is usually sealed with a sealing ring, which is located between the convex and concave surfaces of the flange assembly. When fluid flows between the connecting pipe and the flange butterfly valve, it exerts a certain force on both the connecting pipe and the flange butterfly valve. Over time, this can cause the connection between the connecting pipe and the flange butterfly valve to loosen. Consequently, when the connection between the flange assembly becomes loose or the sealing ring ages and is damaged, leakage will occur at the connection of the flange assembly. Therefore, an improved flange butterfly valve body casting is designed. Utility Model Content

[0005] In view of the defects or deficiencies of the flange butterfly valve body casting, the purpose of this utility model is to provide an improved flange butterfly valve body casting, which can not only play an automatic sealing role when leakage occurs between the first flange and the second flange, but also play a leakage detection role at the connection between the first flange and the second flange.

[0006] To achieve the above-mentioned objectives, the present invention adopts the following technical solution:

[0007] This utility model provides an improved flange butterfly valve body casting, including a valve body and a connecting pipe. The inlet and outlet ends of the valve body are both provided with a first flange, and a first annular mounting groove is provided on one side of the outer wall of the first flange.

[0008] A second flange is provided on the circumferential outer wall of one end of the connecting pipe, and a second annular mounting groove is provided on one side of the outer wall of the second flange.

[0009] An annular expansion waterstop strip is provided between the inner side of the first annular mounting groove and the inner side of the second annular mounting groove.

[0010] Both the first flange and the second flange have a first mounting hole and a second mounting hole on their circumferential outer walls. The first mounting hole is located inside the second mounting hole. A compression ball is provided inside the first mounting hole. The compression ball is connected to a warning ball through a connecting column. The warning ball is located inside the second mounting hole. A spring is sleeved on the outer side of the connecting column. The spring is located between the outer wall of the compression ball and the inner wall of one end of the first mounting hole.

[0011] Preferably, an annular protrusion is provided on one side of the outer wall of the first flange, and the annular protrusion is located inside the first annular mounting groove; an annular groove is provided on one side of the outer wall of the second flange, and the annular groove is located inside the second annular mounting groove.

[0012] Preferably, the annular protrusion is installed in the annular groove, and a sealing ring is provided between one end of the annular protrusion and one end of the groove wall of the annular groove.

[0013] Preferably, the first flange and the second flange are fixedly connected by fastening bolts.

[0014] Preferably, the first mounting hole and the second mounting hole are connected, the first mounting hole on the first flange is connected to the first annular mounting groove on the first flange, and the first mounting hole on the second flange is connected to the second annular mounting groove on the second flange.

[0015] Preferably, the outer circumferential wall of the extrusion ball and the inner circumferential wall of the first mounting hole are in clearance fit, and the outer circumferential wall of the warning ball and the inner circumferential wall of the second mounting hole are in clearance fit.

[0016] Compared with existing technologies, one or more of the above technical solutions have the following beneficial effects:

[0017] 1. In this utility model, through a series of coordinated structural arrangements, when there is some loosening between the first flange on the valve body and the second flange on the connecting pipe, or when the sealing ring ages and is damaged, causing fluid leakage at the connection between the first flange and the second flange, the leaking fluid will first flow to the annular expansion stop strip. The annular expansion stop strip will absorb the leaked fluid. After absorbing the fluid, the annular expansion stop strip will expand and deform. The expanded and deformed annular expansion stop strip can reseal the connection between the first flange and the second flange. Thus, this utility model can play an automatic sealing role when leakage occurs between the first flange and the second flange.

[0018] 2. In this utility model, through a series of structural arrangements, the annular expansion stop strip absorbs fluid and expands and deforms, which will exert a certain force on the extrusion ball. When the extrusion ball is subjected to a certain force, it will move in a certain direction. When the extrusion ball moves in a certain direction, the warning ball will move out of the second mounting hole to the outside. When the staff performs routine maintenance or operation on the valve body, if the staff observes that the warning ball is on the outside, it can be known that there is a leak at the connection between the valve body and the connecting pipe. The staff can repair the connection between the valve body and the connecting pipe in time. Thus, this utility model can play a role in leak detection at the connection between the first flange and the second flange. Attached Figure Description

[0019] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0020] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model.

[0021] Figure 2 This is an exploded structural diagram of the entire utility model.

[0022] Figure 3 This is a schematic diagram of the valve body of this utility model.

[0023] Figure 4 This is a cross-sectional view of the connecting pipe of this utility model.

[0024] Figure 5 This is a utility model Figure 4 A magnified schematic diagram of the structure at point A in the diagram.

[0025] In the picture:

[0026] 100. Valve body; 110. First flange; 111. First annular mounting groove; 112. Annular protrusion;

[0027] 200. Connecting pipe; 210. Second flange; 211. Second annular mounting groove; 212. Annular groove; 213. First mounting hole; 214. Second mounting hole; 220. Extrusion ball; 230. Spring; 240. Warning ball; 250. Connecting post;

[0028] 300. Circular expansion sealing strip;

[0029] 400. Sealing ring. Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0031] It should be noted that the following detailed description is exemplary and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0032] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0033] like Figure 1-5 As shown, an improved flange butterfly valve body casting includes a valve body 100 and a connecting pipe 200. The inlet and outlet ends of the valve body 100 are both provided with a first flange 110. A first annular mounting groove 111 is provided on one side of the outer wall of the first flange 110.

[0034] A second flange 210 is provided on the circumferential outer wall of one end of the connecting pipe 200, and a second annular mounting groove 211 is provided on one side of the outer wall of the second flange 210.

[0035] An annular expansion waterstop strip 300 is provided between the inner side of the first annular mounting groove 111 and the inner side of the second annular mounting groove 211.

[0036] The first flange 110 and the second flange 210 are provided with a first mounting hole 213 and a second mounting hole 214 on both sides of their circumferential outer walls. The first mounting hole 213 is located inside the second mounting hole 214. A compression ball 220 is provided inside the first mounting hole 213. The compression ball 220 is connected to a warning ball 240 through a connecting post 250. The warning ball 240 is located inside the second mounting hole 214. A spring 230 is sleeved on the outer side of the connecting post 250. The spring 230 is located between the outer wall of the compression ball 220 and the inner wall of one end of the first mounting hole 213.

[0037] An annular protrusion 112 is provided on one side of the outer wall of the first flange 110, and the annular protrusion 112 is located inside the first annular mounting groove 111. An annular groove 212 is provided on one side of the outer wall of the second flange 210, and the annular groove 212 is located inside the second annular mounting groove 211.

[0038] An annular protrusion 112 is installed in an annular groove 212. A sealing ring 400 is provided between one end of the annular protrusion 112 and one end of the groove wall of the annular groove 212. Because a sealing ring 400 is provided between one end of the annular protrusion 112 and one end of the groove wall of the annular groove 212, it can seal the connection between the first flange 110 and the second flange 210.

[0039] The first flange 110 and the second flange 210 are fixedly connected by fastening bolts.

[0040] The first mounting hole 213 and the second mounting hole 214 are connected. The first mounting hole 213 on the first flange 110 is connected to the first annular mounting groove 111 on the first flange 110. The first mounting hole 213 on the second flange 210 is connected to the second annular mounting groove 211 on the second flange 210.

[0041] The outer circumferential wall of the compression ball 220 and the inner circumferential wall of the first mounting hole 213 are in clearance fit. Because of this clearance fit, the movement of the compression ball 220 can be limited and guided. Similarly, the outer circumferential wall of the warning ball 240 and the inner circumferential wall of the second mounting hole 214 are in clearance fit. This clearance fit also limits and guides the movement of the warning ball 240.

[0042] Working Principle: During use, when there is some loosening between the first flange 110 on the valve body 100 and the second flange 210 on the connecting pipe 200, or when the sealing ring 400 ages and is damaged, causing fluid leakage at the connection between the first flange 110 and the second flange 210, the leaking fluid will first flow to the annular expansion stop strip 300. The annular expansion stop strip 300 will absorb the leaked fluid. After absorbing the fluid, the annular expansion stop strip 300 will expand and deform, allowing the connection between the first flange 110 and the second flange 210 to be sealed again. Thus, this invention can prevent leakage between the first flange 110 and the second flange 210. When a leak occurs, the annular expansion sealing strip 300 absorbs fluid and expands, which exerts a certain force on the compression ball 220. When the compression ball 220 is subjected to a certain force, it will move in a certain direction. When the compression ball 220 moves in a certain direction, the warning ball 240 will move out from the second mounting hole 214 to the outside. When the staff performs routine maintenance or operation on the valve body 100, if the staff observes that the warning ball 240 is on the outside, it can be known that there is a leak at the connection between the valve body 100 and the connecting pipe 200. The staff can then promptly repair the connection between the valve body 100 and the connecting pipe 200. Thus, this utility model can play a role in leak detection at the connection between the first flange 110 and the second flange 210.

[0043] The above description is merely a preferred embodiment of this utility model and is not intended to limit the invention. For those skilled in the art, various modifications and variations can be made to this invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this invention should be included within the protection scope of this invention.

Claims

1. An improved flanged butterfly valve body casting, comprising a valve body (100) and a connecting pipe (200), characterized in that: The valve body (100) is provided with a first flange (110) at both the inlet and outlet ends. A first annular mounting groove (111) is provided on one side of the outer wall of the first flange (110). A second flange (210) is provided on the circumferential outer wall of one end of the connecting pipe (200), and a second annular mounting groove (211) is provided on one side of the outer wall of the second flange (210). An annular expansion waterstop strip (300) is provided between the inner side of the first annular mounting groove (111) and the inner side of the second annular mounting groove (211). The first flange (110) and the second flange (210) are provided with a first mounting hole (213) and a second mounting hole (214) on both sides of the outer circumferential wall. The first mounting hole (213) is located inside the second mounting hole (214). A compression ball (220) is provided inside the first mounting hole (213). The compression ball (220) is connected to a warning ball (240) through a connecting column (250). The warning ball (240) is located inside the second mounting hole (214). A spring (230) is sleeved on the outer side of the connecting column (250). The spring (230) is located between the outer wall of the compression ball (220) and the inner wall of one end of the first mounting hole (213).

2. The improved flange butterfly valve body casting according to claim 1, characterized in that: The first flange (110) has an annular protrusion (112) on one side of its outer wall, and the annular protrusion (112) is located inside the first annular mounting groove (111). The second flange (210) has an annular groove (212) on one side of its outer wall, and the annular groove (212) is located inside the second annular mounting groove (211).

3. The improved flange butterfly valve body casting according to claim 2, characterized in that: The annular protrusion (112) is installed in the annular groove (212), and a sealing ring (400) is provided between one end of the annular protrusion (112) and one end of the groove wall of the annular groove (212).

4. The improved flange butterfly valve body casting according to claim 1, characterized in that: The first flange (110) and the second flange (210) are fixedly connected by fastening bolts.

5. The improved flange butterfly valve body casting according to claim 1, characterized in that: The first mounting hole (213) and the second mounting hole (214) are connected. The first mounting hole (213) on the first flange (110) is connected to the first annular mounting groove (111) on the first flange (110). The first mounting hole (213) on the second flange (210) is connected to the second annular mounting groove (211) on the second flange (210).

6. The improved flange butterfly valve body casting according to claim 1, characterized in that: The outer circumferential wall of the extrusion ball (220) and the inner circumferential wall of the first mounting hole (213) are in clearance fit, and the outer circumferential wall of the warning ball (240) and the inner circumferential wall of the second mounting hole (214) are in clearance fit.

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