Butt welded floating ball valve

Abstract

The utility model relates to valve technical field especially relates to a butt welding formula floating ball valve, it includes valve body, two end covers and two valve bonnets, is provided with valve cavity in the valve body, the left and right sides of valve cavity are provided with first medium fluid passage respectively, the position of valve body corresponding first medium fluid passage respectively has assembly hole outwardly expanding, two end covers are detachably arranged in two assembly holes through threaded connection, through being provided with two welding connecting pipes, are connected with the pipeline through the mode of welding, compared with the same diameter's floating ball valve of adopting flange connection structure, the overall size is reduced significantly, is applicable to especially narrow pipeline environment, and, welding connecting pipe is connected with the valve body through valve bonnet, connecting snap ring and connecting screw, after welding connecting pipe and pipeline weld, valve body can also be disassembled to maintain, realizes on -line maintenance, has improved the use time of butt welding formula floating ball valve.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and in particular to a butt-welded floating ball valve. Background Technology

[0002] Because floating ball valves eliminate the fixed upper and lower shafts of the ball in conventional ball valves, they can reduce the overall size of the valve, making them commonly used in narrow piping environments. Currently, commonly used floating ball valves connect to the pipeline via flange structures, which typically include at least two disc-shaped flanges. This relatively large size contributes to the overall size of the floating ball valve, making installation in particularly narrow piping environments inconvenient and hindering its usability. Utility Model Content

[0003] The technical problem solved by this utility model is to provide a butt-welded floating ball valve with a relatively small overall size.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a butt-welded floating ball valve, including a valve body, two end caps and two valve covers. A valve cavity is provided in the valve body. A first medium fluid channel is provided on the left and right sides of the valve cavity. The first medium fluid channel is connected to the valve cavity. Assembly holes are expanded outward on the valve body corresponding to the positions of the first medium fluid channels. The two end caps are detachably installed in the two assembly holes by threaded connection. The first medium fluid channel is located in the middle of the end cap. It also includes two connecting rings and two welded connecting pipes. A connecting through hole is provided in the middle of the connecting ring. The cross-section of the connecting ring is a circular structure composed of two semi-circular rings.

[0005] The valve cover has a through mounting hole in the center, which is stepped. The mounting hole includes a first hole and a second hole. A connecting step is provided between the first hole and the second hole. The first hole is located outside the second hole, and the cross-sectional diameter of the first hole is smaller than that of the second hole.

[0006] Two welded connecting pipes are respectively installed in the mounting holes of the two valve covers. A second medium fluid channel is provided in the middle of the welded connecting pipe, and the two second medium fluid channels are respectively connected to the two first medium fluid channels. A mounting groove is provided on the outer wall of the welded connecting pipe. The connecting ring is fitted into the mounting groove through the connecting through hole, and the two connecting rings are respectively installed in the two second holes.

[0007] The two valve covers are detachably mounted on the left and right sides of the valve body by connecting screws, and the inner surface of the welded connecting pipe is in contact with the outer surface of the valve cover, and the outer surface of the connecting retaining ring is in contact with the surface of the connecting step.

[0008] Furthermore, both the first and second holes are cylindrical.

[0009] Furthermore, the butt-welded floating ball valve has a symmetrical structure.

[0010] Furthermore, the axial centerline of the first medium fluid channel and the axial centerline of the second medium fluid channel are on the same straight line.

[0011] Furthermore, a sealing structure is installed between the welded connecting pipe and the valve cover.

[0012] Furthermore, the sealing structure includes O-rings and graphite gaskets.

[0013] Furthermore, the valve cover is provided with a through-hole for connecting threads, and the valve body is provided with a connecting thread groove in the left and right directions. The connecting screws are matched and inserted into the connecting thread hole and the connecting thread groove to detachably mount the valve cover onto the valve body.

[0014] Furthermore, the second medium fluid channel consists of a first cylindrical section, a frustum-shaped section, and a second cylindrical section from the inside out, with the cross-sectional dimension of the second cylindrical section being smaller than that of the first cylindrical section.

[0015] Furthermore, the outer side of the welded connecting pipe is located outside the valve cover, and a weld bevel structure is provided on the outer side of the welded connecting pipe.

[0016] The beneficial effects of this utility model are as follows: The butt-welded floating ball valve is equipped with two welded connecting pipes. The outer side of the welded connecting pipe is the connection end that is welded to the pipeline. Compared with the floating ball valve of the same diameter using a flange connection structure, the length of the butt-welded floating ball valve of this utility model is reduced by about 20-25%, the weight is reduced by 18-22%, and the overall size is significantly reduced, making it suitable for particularly narrow pipeline environments. Furthermore, the welded connecting pipe is connected to the valve body through the valve cover, connecting ring, and connecting screws. After the welded connecting pipe is welded to the pipeline, the valve body can also be disassembled for maintenance, realizing online maintenance and improving the service life of the butt-welded floating ball valve. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the present invention;

[0018] Figure 2 This is a schematic diagram of the valve cover;

[0019] Figure 3 This is a schematic diagram of the valve cover;

[0020] The components are labeled as follows: valve body 1, end cap 2, first medium fluid channel 21, valve cover 3, first hole 31, second hole 32, connecting step 33, connecting threaded hole 34, connecting retaining ring 4, welded connecting pipe 5, second medium fluid channel 51, mounting groove 52, welded bevel structure 53, first cylindrical section 511, truncated cone section 512, second cylindrical section 513, connecting screw 6, O-ring 71, graphite gasket 72. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0022] like Figure 1 , Figure 2 and Figure 3 As shown, the present invention relates to a butt-welded floating ball valve, comprising a valve body 1, two end caps 2 and two valve covers 3. The valve body 1 is provided with a valve cavity, and the left and right sides of the valve cavity are respectively provided with a first medium fluid channel 21, which is connected to the valve cavity. The valve body 1 is provided with assembly holes that expand outward from the positions corresponding to the first medium fluid channel 21. The two end caps 2 are respectively detachably installed in the two assembly holes by threaded connection. The first medium fluid channel 21 is located in the center of the end cap 2. The valve body 1 also includes two connecting rings 4 and two welded connecting pipes 5. The connecting rings 4 are provided with a connecting through hole in the center. The cross-section of the connecting rings 4 is a circular structure composed of two semi-circular rings.

[0023] The valve cover 3 has a through mounting hole in the center, which is a stepped structure. The mounting hole includes a first hole 31 and a second hole 32. A connecting step 33 is provided between the first hole 31 and the second hole 32. The first hole 31 is located outside the second hole 32, and the cross-sectional diameter of the first hole 31 is smaller than that of the second hole 32.

[0024] Two welded connecting pipes 5 are respectively installed in the mounting holes of the two valve covers 3. A second medium fluid channel 51 is provided in the middle of the welded connecting pipe 5, which is connected to the two first medium fluid channels 21 respectively. A mounting groove 52 is provided on the outer wall of the welded connecting pipe 5. The connecting ring 4 is installed in the mounting groove 52 through the connecting through hole, and at the same time, the two connecting rings 4 are respectively installed in the two second holes 32.

[0025] Two valve covers 3 are detachably mounted on the left and right sides of the valve body 1 by connecting screws 6, and the outer side of the welded connecting pipe 5 is located on the outer side of the valve cover 3. The inner surface of the welded connecting pipe 5 is in contact with the outer surface of the valve cover 3, and the outer surface of the connecting ring 4 is in contact with the surface of the connecting step 33.

[0026] The outer side of the welded connecting pipe 5 is the connection end that is welded to the pipeline. Of course, the butt-welded floating ball valve of this utility model also includes the same components as the conventional floating ball valve, such as the ball, valve stem, valve seat support ring, and valve seat, which will not be described here.

[0027] The connecting ring 4 refers to a circular ring structure with a certain thickness, which is composed of two semi-circular rings with a certain thickness. The two semi-circular rings are not connected together. In order to facilitate its processing, a complete circular ring structure is first processed, and then cut into two semi-circular rings along the axis to form the connecting ring 4.

[0028] During installation, the butt-welded floating ball valve of this utility model is welded to the pipeline through the connecting ends of two welded connecting pipes 5. When maintenance of the floating ball valve is required, the main body of the floating ball valve needs to be disassembled. Since the connecting ends of the welded connecting pipes 5 are already welded to the pipeline, the welded connecting pipes 5 cannot be disassembled. The disassembly process of the floating ball valve is as follows: First, remove the connecting screws 6, then move the valve cover 12 along the welded connecting pipes 5 or the pipeline to separate the valve cover 12 from the valve body 1, and then remove the connecting retaining ring 4. At this time, the welded connecting pipes 5 and the valve body 1 are no longer fixedly connected. With the help of external force, the entire valve body 1 can be disassembled from between the two welded connecting pipes 5. Finally, the components in the valve body 1 can be repaired or replaced.

[0029] Specifically, for ease of processing and use, the valve body 1, end cover 2, valve cover 3, connecting ring 4, and welded connecting pipe 5 are all circular rotating bodies that rotate along the horizontal axis. The butt-welded floating ball valve has a left-right symmetrical structure, and the upstream and downstream sides of the floating ball valve have the same installation structure, which is convenient for use.

[0030] To facilitate the movement of the valve cover 12 along the welded connecting pipe 5, the outer surface of the welded connecting pipe 5 is preferably cylindrical, and both the first hole 31 and the second hole 32 are preferably cylindrical.

[0031] To ensure the smooth flow of the medium into the ball valve and to facilitate its manufacturing, for example... Figure 1 As shown, the axial centerline of the first medium fluid channel 21 and the axial centerline of the second medium fluid channel 51 are on the same straight line, and the cross-sectional diameters of the first medium fluid channel 21 and the second medium fluid channel 51 are the same.

[0032] To ensure the sealing performance of the floating ball valve, a sealing structure is installed between the welded connecting pipe 5 and the valve cover 3. For example... Figure 1 As shown, the sealing structure includes an O-ring 71 and a graphite gasket 72. The O-ring 71 and the graphite gasket 72 constitute two seals, which improves the sealing effect of the sealing structure.

[0033] Since the welded connecting pipe 5 is fixedly connected to the valve body 1 through the valve cover 3, the connecting retaining ring 4, and the connecting screw 6, the connecting screw 6 provides the fixing force, which is then transmitted to the welded connecting pipe 5 through the connecting step 33 in the valve cover 3 and the connecting retaining ring 4, thus achieving the fixed connection of the welded connecting pipe 5. To improve the fixing effect of the welded connecting pipe 5, for example... Figure 1 , Figure 2 As shown, the valve cover 3 is provided with a connecting threaded hole 34 that runs through the left and right sides, and the valve body 1 is provided with a connecting threaded groove in the left and right directions. The connecting screw 6 is matched and inserted into the connecting threaded hole 34 and the connecting threaded groove to detachably mount the valve cover 3 onto the valve body 1.

[0034] To further reduce the size of floating ball valves, for example... Figure 1 , Figure 3 As shown, the second medium fluid channel 51 consists of a first cylindrical section 511, a frustum-shaped conical section 512, and a second cylindrical section 513 from the inside out. The cross-sectional dimension of the first cylindrical section 511 is smaller than that of the second cylindrical section 513, and the cross-sectional dimension of the first cylindrical section 511 is the same as that of the first medium fluid channel 21. As the size of the first medium fluid channel 21 decreases, the corresponding end cap 2 and valve cavity also decrease in size, further reducing the size of the floating ball valve.

[0035] To facilitate welding of the welded connecting pipe 5 to the pipeline, a welding bevel structure 53 is provided on the outer side of the welded connecting pipe 5.

[0036] In summary, the butt-welded floating ball valve of this invention features two welded connecting pipes 5. The outer side of each welded connecting pipe 5 is a connecting end that is welded to the pipeline. Compared to a floating ball valve of the same diameter using a flange connection structure, the butt-welded floating ball valve of this invention has a length reduced by approximately 20-25%, a weight reduced by 18-22%, and a significantly smaller overall size, making it suitable for particularly narrow pipeline environments. Furthermore, the welded connecting pipe 5 is connected to the valve body 1 via the valve cover 3, connecting retainer 4, and connecting screws 6. After the welded connecting pipe 5 is welded to the pipeline, the valve body can be disassembled for maintenance, enabling online maintenance and extending the service life of the butt-welded floating ball valve.

Claims

1. A butt-welded floating ball valve, comprising a valve body (1), two end caps (2) and two valve covers (3), wherein a valve cavity is provided in the valve body (1), and a first medium fluid channel (21) is provided on the left and right sides of the valve cavity, the first medium fluid channel (21) being connected to the valve cavity, and assembly holes are provided on the valve body (1) corresponding to the positions of the first medium fluid channel (21) respectively. The two end caps (2) are respectively detachably disposed in the two assembly holes by threaded connection, and the first medium fluid channel (21) is located in the center of the end cap (2), characterized in that: It also includes two connecting rings (4) and two welded connecting pipes (5). The connecting rings (4) have a connecting through hole in the middle. The cross-section of the connecting rings (4) is a circular structure composed of two semi-circular rings. The valve cover (3) has a through mounting hole in the middle. The mounting hole has a stepped structure and includes a first hole (31) and a second hole (32). A connecting step (33) is provided between the first hole (31) and the second hole (32). The first hole (31) is located outside the second hole (32), and the cross-sectional diameter of the first hole (31) is smaller than that of the second hole (32). Two welded connecting pipes (5) are respectively installed in the mounting holes of the two valve covers (3). A second medium fluid channel (51) is provided in the middle of the welded connecting pipe (5) and is connected to the two first medium fluid channels (21). A ring of mounting groove (52) is provided on the outer wall of the welded connecting pipe (5). The connecting ring (4) is installed in the mounting groove (52) through the connecting through hole. At the same time, the two connecting rings (4) are respectively installed in the two second holes (32). Two valve covers (3) are detachably mounted on the left and right sides of the valve body (1) by connecting screws (6), and the inner surface of the welded connecting pipe (5) is in contact with the outer surface of the valve cover (3), and the outer surface of the connecting ring (4) is in contact with the surface of the connecting step (33).

2. The butt-welded floating ball valve as described in claim 1, characterized in that: Both the first hole (31) and the second hole (32) are cylindrical.

3. The butt-welded floating ball valve as described in claim 1, characterized in that: The butt-welded floating ball valve has a symmetrical structure.

4. The butt-welded floating ball valve as described in claim 1, characterized in that: The axial centerline of the first medium fluid channel (21) and the axial centerline of the second medium fluid channel (51) are on the same straight line.

5. The butt-welded floating ball valve as described in claim 1, characterized in that: A sealing structure is provided between the welded connecting pipe (5) and the valve cover (3).

6. The butt-welded floating ball valve as described in claim 5, characterized in that: The sealing structure includes an O-ring (71) and a graphite gasket (72).

7. The butt-welded floating ball valve as described in claim 1, characterized in that: The valve cover (3) is provided with a connecting threaded hole (34) that runs through the left and right sides, and the valve body (1) is provided with a connecting threaded groove in the left and right directions. The connecting screw (6) is matched and inserted into the connecting threaded hole (34) and the connecting threaded groove to detachably install the valve cover (3) on the valve body (1).

8. The butt-welded floating ball valve as described in claim 1, characterized in that: The second medium fluid channel (51) consists of a first cylindrical section (511), a frustum-shaped section (512), and a second cylindrical section (513) from the inside to the outside. The cross-sectional dimension of the first cylindrical section (511) is smaller than that of the second cylindrical section (513).

9. The butt-welded floating ball valve as described in any one of claims 1 to 8, characterized in that: The outer side of the welded connecting pipe (5) is located outside the valve cover (3), and a welded bevel structure (53) is provided on the outer side of the welded connecting pipe (5).

Images