Hard seal welding ball valve

Abstract

The utility model discloses a hard seal welding ball valve, belongs to the technical field of ball valves, and solves the problems that according to an existing welding mode, welding is only carried out on gaps and notches among all parts through welding wires, the welding basically floats on the surface, the sealing performance of a valve body is poor, and the service life of the valve body is prolonged. And even the defects exist in the connection strength of the welded ball valve, and for upstream enterprises with strict quality requirements, the welded ball valve does not meet the product requirements. Comprising a flange part, an inlet part and a vertical pipe part, and a through groove is formed in the flange part. During production, the first part, the second part and the flange part are obtained only by casting and can be spliced after simple polishing and grinding, the insertion columns and the welding wires are arranged at the splicing positions, the whole valve body is directly subjected to butt welding, the welding wires are completely melted, sufficient connection and sealing of the connecting positions are ensured, the effect is enhanced, the connection strength is enhanced by matching with the insertion columns, and the separation risk is reduced; and the production efficiency and the product quality can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of ball valves, in particular to a hard-sealed welded ball valve. Background Art

[0002] Welded ball valve is a valve commonly used in pipeline systems. It controls the flow of fluid by rotating the ball. Welded ball valves are usually composed of a ball, a valve stem, a valve seat, a sealing ring and other components. The ball is provided with a hole, called a through hole. The flow of fluid is controlled by rotating the ball to align or close the through hole with the channel of the pipeline.

[0003] The advantages of welded ball valve include simple structure, quick opening and closing, good sealing, long service life, etc. It is suitable for the control of various media such as liquids and gases, and is widely used in pipeline systems in the fields of chemical industry, petroleum, metallurgy, electric power, etc.

[0004] When installing and using a welded ball valve, you need to pay attention to selecting the material and specifications that are suitable for the pipeline requirements, and ensure that it is installed correctly, easy to operate, and easy to maintain. In addition, regularly checking the sealing performance of the valve and promptly dealing with leakage problems can effectively extend the service life of the welded ball valve and ensure the normal operation of the pipeline system.

[0005] In the prior art, the production of the valve body in the welded ball valve usually involves taking a metal cylinder, cutting the metal cylinder through a lathe to obtain a complete valve body and a flange, welding the valve body and the flange, and then splicing them to obtain the entire welded ball valve. However, this requires experience or precision requirements in cutting operations for manufacturers, but for most OEM manufacturers, it is not easy to meet the above requirements. As a result, upstream valve companies need to rely on multiple OEM manufacturers that meet the requirements to produce welded ball valves, or a few OEM manufacturers that meet the requirements need to spend longer time to produce the same number of welded ball valves.

[0006] Therefore, in the prior art, the welded ball valve is split into multiple parts for casting. After casting, the parts are connected by welding. However, the current welding method is only to weld the gaps between the parts with welding wire. Such welding is basically superficial, and there are problems not only in the sealing of the valve body, but also in the connection strength. For upstream companies with strict quality requirements, such welded ball valves do not meet product requirements.

[0007] Therefore, a hard seal welded ball valve is proposed to solve or alleviate the above problems. Utility Model Content

[0008] The utility model aims to solve the shortcomings in the prior art and proposes a hard seal welding ball valve.

[0009] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0010] A hard-seal welded ball valve comprises a flange portion, an inlet portion, and a vertical tube portion, wherein the flange portion is provided with a through groove, and an arc groove perpendicular to the central axis of the through groove and fitted with the wall of the vertical tube portion is provided on the end face thereof, a connecting arc groove 1 is provided on the inner wall of the arc groove, one end of the inlet portion is embedded in the through groove, a vertical opening groove for inserting the vertical tube portion is provided on the inlet portion, an inner ring groove is provided on the inner wall of the vertical opening groove, a connecting arc groove 2 corresponding to the connecting arc groove 1 and an outer ring groove corresponding to the inner ring groove are provided on the outer ring of the vertical tube portion, welding wires are embedded in the connecting arc groove 1 and the connecting arc groove 2, and in the inner ring groove and the outer ring groove.

[0011] Preferably, the inlet portion includes several fixedly connected sub-portions, the sub-portion one includes a ball portion and an inlet pipe portion integrally formed therewith, the ball portion includes a round tube and a bowl portion integrally formed therewith, the inlet pipe portion is tubular and is connected to the bowl portion.

[0012] Preferably, a plurality of slots 1 are provided on the cross section of the section 1, and plug posts are commonly inserted into the slots 1 of adjacent sections 1, and thread grooves are provided on the outer circles of the plug posts, and welding wires can be embedded in the thread grooves.

[0013] Preferably, both end edges of the plug post are provided with chamfered surfaces.

[0014] Preferably, a guide groove 1 is provided on the cross section of the section 1 and runs through both ends of the section in the length direction, and welding wires can be embedded in the guide grooves 1 of adjacent sections 1.

[0015] Preferably, the guide groove passes through a plurality of slots.

[0016] Preferably, the vertical pipe portion includes a plurality of sub-sections 2, a plurality of slots 2 are opened on the cross section of the sub-sections 2, and the plug posts are also inserted into the slots 2 of adjacent sub-sections 2.

[0017] Preferably, a guide groove 2 is provided on the cross section of the second section and passes through both ends of the cross section in the length direction, and welding wires can be embedded in the guide grooves 2 of adjacent second sections.

[0018] The utility model has the following beneficial effects:

[0019] When the utility model needs to be produced, it only needs to obtain a number of sub-sections 1, 2 and flange sections through a casting process. After simple polishing and grinding, they can be spliced, and plug posts and welding wires are basically provided at the splicing locations. After the initial connection is completed, the entire valve body is directly welded by butt welding, so that the welding wire can be completely melted, thereby fully connecting and sealing the connection between sub-section 1, 2 and the flange section. While enhancing the sealing effect, the connection strength is also enhanced by cooperating with the plug posts, making it difficult for the valve body to come off. Subsequent assembly work of the ball valve can then be carried out, which can effectively improve the production efficiency and quality of the ball valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the utility model;

[0021] Figure 2 It is an exploded view of the valve body in the utility model;

[0022] Figure 3 for Figure 2 The enlarged view of point A in the middle;

[0023] Figure 4 for Figure 2 The enlarged view of point B in the middle;

[0024] Figure 5 It is a structural schematic diagram of the plug-in column in the utility model.

[0025] 1. Inlet; 101. Ball part; 1011. Vertical groove; 1012. Inner ring groove; 102. Inlet pipe part; 1031. Slot one; 1032. Guide groove one; 2. Vertical pipe part; 201. Outer ring groove; 202. Slot two; 203. Guide groove two; 3. Connecting plate; 301. Handle; 4. Flange part; 401. Through hole; 402. Circular arc groove; 403. Through groove; 5. Connecting flange; 6. Insert column; 601. Chamfered surface; 602. Threaded groove. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0027] A hard seal welded ball valve, such as Figure 1 and 2 As shown, it includes a flange part 4, an inlet part 1, a vertical pipe part 2, a valve stem rotatably connected in the vertical pipe part 2, a valve ball fixedly connected to the lower end of the valve stem, and a connecting flange 5 connected to the flange part 4 by bolts and nuts. The upper end of the valve stem is fixedly connected to a connecting plate 3, and the connecting plate 3 is fixedly connected to a handle 301.

[0028] like Figure 4 As shown, the inlet 1 includes a plurality of fixedly connected sub-sections, and the sub-section 1 includes a ball portion 101 and an inlet tube portion 102 integrally formed therewith, the ball portion 101 includes a circular tube and a bowl portion integrally formed therewith, the inlet tube portion 102 is tubular and is connected to the bowl portion, and a plurality of slots 1031 with cylindrical cross-sections are provided on the cross-section of the sub-section 1, and a vertical groove 1011 for inserting the vertical tube portion 2 is provided on the inlet 1, and an inner annular groove 1012 is provided on the inner wall of the vertical groove 1011, and the specific position of the vertical groove 1011 is on the circular tube of the ball portion 101, and it is located on one end away from the bowl portion, in addition, a guide groove 1032 is provided on the cross-section of the sub-section that runs through both ends of the cross-section in the length direction, and the guide groove 1032 passes through a plurality of slots 1031, and welding wires can be embedded in the guide grooves 1032 of adjacent sub-sections.

[0029] like Figure 3 As shown, the vertical tube portion 2 includes a plurality of subsections 2, a plurality of slots 202 with cylindrical cross-sections are provided on the cross-section of the subsection 2, a guide groove 203 running through both ends of the cross-section in the length direction is provided on the cross-section of the subsection 2, and welding wires can be embedded in the guide grooves 203 of adjacent subsections 2 together.

[0030] like Figure 5 As shown, a plug-in column 6 is commonly inserted into the slot 1 1031 of the adjacent section 1, and the plug-in column 6 is also inserted into the slot 2 202 of the adjacent section 2. A threaded groove 602 is provided on the outer ring of the plug-in column 6, and a welding wire can be embedded in the threaded groove 602. Chamfered surfaces 601 are provided on the edges of both ends of the plug-in column 6.

[0031] like Figure 2 As shown, the flange portion 4 is provided with a through groove 403 and a plurality of through holes 401 located on the outer circle of the through groove 403, bolts pass through the through holes 401, and an arc groove 402 perpendicular to the central axis of the through groove 403 and in contact with the wall of the vertical tube portion 2 is provided on its end face, a connecting arc groove 1 is provided on the inner wall of the arc groove 402, one end of the inlet portion 1 is embedded in the through groove 403, a connecting arc groove 2 corresponding to the connecting arc groove 1, and an outer ring groove 201 corresponding to the inner ring groove 1012 are provided on the outer circle of the vertical tube portion 2, and welding wires are embedded in the connecting arc groove 1 and the connecting arc groove 2, and in the inner ring groove 1012 and the outer ring groove 201.

[0032] When contemporary manufacturers need to produce the welded ball valve, there is no need to obtain the valve body by cutting a metal cylinder, nor is there a need for welders to perform surface welding on the parts that make up the valve body. Instead, the operator can wrap a portion of the welding wire around the threaded groove 602 of the plug post 6, and adjust the overall shape of the entire welding wire to adapt to the shape of the guide groove 1 1032 and the guide groove 2 203, and prepare a portion of the welding wire, insert the plug post 6 into the slot 1 1031 and the slot 2 202, and embed the welding wire wrapped around the plug post 6 into the guide groove 1 1032 and the guide groove 2 203, while the remaining welding wire is embedded between the inner ring groove 1012 and the outer ring groove 201, and between the connecting arc groove 1 and the connecting arc groove 2, and then complete the splicing of several distribution parts 1 and 2, and at the same time splice the flange part 4, the inlet part 1, and the vertical pipe part 2 together to obtain a preliminary valve body.

[0033] After the initially obtained valve body is pressed together through a mold, it is placed on a butt welding machine for butt welding, so that the flange part 4, the inlet part 1, and the vertical pipe part 2 are completely connected together, and the melted welding wire can be located in the joints of the flange part 4, the inlet part 1, and the vertical pipe part 2, as well as between the joints of several sections one and several sections two, so as to ensure the sealing performance of the entire valve body. The setting of the plug column 6 makes it possible for adjacent accessories to be connected not through welding wires when welding, but through the plug column 6 to cooperate to form a steel bar structure, thereby enhancing the connection strength when adjacent accessories are connected.

[0034] Finally, the remaining accessories are assembled manually to obtain a complete ball valve.

[0035] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A hard seal welded ball valve, characterized in that: The invention comprises a flange part (4), an inlet part (1), and a vertical tube part (2), wherein the flange part (4) is provided with a through groove (403), and an arc groove (402) is provided on the end surface thereof, which is perpendicular to the central axis of the through groove (403) and is in contact with the tube wall of the vertical tube part (2), and a connecting arc groove (1) is provided on the inner wall of the arc groove (402), one end of the inlet part (1) is embedded in the through groove (403), and a through groove (403) is provided on the inlet part (1) for The vertical pipe portion (2) is inserted into a vertical groove (1011), an inner ring groove (1012) is provided on the inner wall of the vertical groove (1011), a connecting arc groove 2 corresponding to the connecting arc groove 1, and an outer ring groove (201) corresponding to the inner ring groove (1012) are provided on the outer ring of the vertical pipe portion (2), and welding wires are embedded in the connecting arc groove 1 and the connecting arc groove 2, and in the inner ring groove (1012) and the outer ring groove (201).

2. A hard seal welded ball valve according to claim 1, characterized in that: The inlet portion (1) comprises a plurality of fixedly connected sub-portions, wherein the sub-portion comprises a ball portion (101) and an inlet pipe portion (102) integrally formed therewith, the ball portion (101) comprises a round tube and a bowl portion integrally formed therewith, and the inlet pipe portion (102) is tubular and is connected to the bowl portion.

3. A hard seal welded ball valve according to claim 2, characterized in that: A plurality of slots (1031) are provided on the cross section of the first section, and a plug post (6) is commonly inserted into the slots (1031) of the adjacent first sections, and a thread groove (602) is provided on the outer ring of the plug post (6), and a welding wire can be embedded in the thread groove (602).

4. A hard seal welded ball valve according to claim 3, characterized in that: The two end edges of the plug post (6) are both provided with chamfered surfaces (601).

5. A hard seal welded ball valve according to claim 3, characterized in that: A guide groove (1032) is provided on the cross section of the first section and runs through both ends of the cross section in the length direction. The guide grooves (1032) of adjacent first sections can be embedded with welding wires.

6. A hard seal welded ball valve according to claim 5, characterized in that: The guide groove 1 (1032) passes through a plurality of slots 1 (1031).

7. The hard seal welded ball valve according to claim 3, characterized in that: The vertical pipe part (2) includes a plurality of second sub-sections, a plurality of second slots (202) are provided on the cross section of the second sub-section, and the plug post (6) is also plugged into the second slots (202) of the adjacent second sub-section.

8. A hard seal welded ball valve according to claim 7, characterized in that: The section of the second section is provided with a second guide groove (203) which runs through both ends of the section in the length direction, and welding wires can be embedded in the second guide grooves (203) of adjacent second sections.

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