Three-piece type flange ball valve

Abstract

The utility model relates to the related technical field of ball valves, in particular to a three-piece type flange ball valve which comprises a valve body, a fixed valve seat is arranged on the outer side surface of the valve body, a flange plate is fixedly connected to the surface of one side of the fixed valve seat, and a sealing mechanism is arranged on the inner side surface of a limiting valve seat. A flow limiting mechanism is arranged on the surface of the inner side of the ball core. According to the three-piece type flange ball valve, the first sealing plate is placed on the inner side surface of the limiting valve seat, it is ensured that the first sealing plate is tightly attached to the limiting valve seat, then the second sealing ring and the third sealing ring are connected to the outer side surface of the first sealing plate in a clamped mode so as to improve the sealing effect, and then the first fixing plate is fixed to the surface of one side of the first sealing plate; in the using process, when the valve rod drives the ball core to rotate, all the sealing plates and the sealing rings are tightly matched, medium leakage is effectively prevented, and normal work of the valve is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of ball valves, in particular to a three-piece flange ball valve. Background Technique

[0002] A ball valve is a valve whose closing part is driven by a valve stem and rotates around the axis of the ball valve. It can also be used for the regulation and control of fluids, especially suitable for media containing fibers, tiny solid particles, etc. A multi-way ball valve can not only flexibly control the confluence, shunt and flow direction switching of the medium on the pipeline, but also close any channel to connect the other two channels. The valve should generally be installed horizontally in the pipeline. Commonly used ones include V-type ball valves, three-piece flange ball valves, etc. The three-piece flange ball valve and the gate valve belong to the same type of valve. The difference is that its closing part is a sphere, and the sphere rotates around the center line of the valve body to achieve opening and closing. The ball valve is mainly used to cut off, distribute and change the flow direction of the medium in the pipeline. The three-piece ball valve is a new type of valve widely used in recent years. However, the tightness of most current three-piece flange ball valves is not as good as that of other types of valves. Therefore, a three-piece flange ball valve is particularly needed.

[0003] However, most of the existing three-piece flange ball valves still have some problems during use, such as poor sealing effect, being easily affected by the medium pressure and leaking, inconvenient operation, being easily damaged. Most ball valves can only rotate the ball core by 90 degrees to achieve the effect of fully opening and fully closing the ball valve, and cannot adjust the flow according to actual needs, with insufficient flexibility in use. After long-term use, not only will the outer wall of the ball core be thinned by the impact of the water flow, but also the service life of the ball core will be shortened. Content of the Utility Model

[0004] The purpose of the utility model is to provide a three-piece flange ball valve to solve the problems in the above-mentioned background technique, that is, most of the existing three-piece flange ball valves still have some problems during use, such as poor sealing effect, being easily affected by the medium pressure and leaking, inconvenient operation, being easily damaged. Most ball valves can only rotate the ball core by 90 degrees to achieve the effect of fully opening and fully closing the ball valve, and cannot adjust the flow according to actual needs, with insufficient flexibility in use. After long-term use, not only will the outer wall of the ball core be thinned by the impact of the water flow, but also the service life of the ball core will be shortened.

[0005] To achieve the above object, the utility model provides the following technical solution: a three-piece flange ball valve, including a valve body, a fixed valve seat is arranged on the outer surface of the valve body, a flange plate is fixedly connected to one side surface of the fixed valve seat, a first sealing ring is fixedly connected to the inner surface of the valve body, a limiting valve seat is fixedly connected to one side surface of the first sealing ring, a sealing mechanism is arranged on the inner surface of the limiting valve seat, a ball core is fixedly connected to the inner surface of the valve body, a valve rod is fixedly connected to the outer surface of the ball core, a flow limiting mechanism is arranged on the inner surface of the ball core, a second connecting plate is fixedly installed on the outer surface of the valve rod, a compression nut is threadedly connected to the outer surface of the valve rod, a handle is snap-connected to the outer surface of the valve rod, and a fixing nut is threadedly connected to the outer surface of the valve rod;

[0006] The sealing mechanism includes a first sealing plate, a second sealing ring, a third sealing ring, a first fixing plate, a second fixing plate, bolts, a first connecting plate, a second sealing plate, a fourth sealing ring, a fifth sealing ring, a sixth sealing ring and a third fixing plate. The first sealing plate is snap-connected to the inner surface of the limiting valve seat, the second sealing ring is snap-connected to the outer surface of the first sealing plate, the third sealing ring is snap-connected to the outer surface of the first sealing plate, a first fixing plate is fixedly connected to one side surface of the first sealing plate, a second fixing plate is fixedly connected to one side surface of the first fixing plate, bolts are fixedly connected to the outer surface of the second fixing plate, a first connecting plate is fixedly connected to the outer surface of the second fixing plate, the second sealing plate is snap-connected to the outer surface of the first connecting plate, the fourth sealing ring is snap-connected to the outer surface of the second sealing plate, the fifth sealing ring is snap-connected to the outer surface of the second sealing plate, the sixth sealing ring is snap-connected to one side surface of the second sealing plate, and a third fixing plate is fixedly connected to one side surface of the second sealing plate.

[0007] Preferably, the flow limiting mechanism includes a turning key, a rotating shaft, a flow limiting plate, a gasket and a fixing block. A rotating shaft is arranged inside the valve rod, a turning key is fixedly connected to one end surface of the rotating shaft, a flow limiting plate is fixedly connected to one end surface of the rotating shaft, a gasket is sleeved and fixed on the outer surface of the valve rod, and a fixing block is fixedly connected to the lower surface of the valve rod.

[0008] Preferably, the bolts are evenly distributed on one side surface of the second fixing plate and evenly distributed on the outer surface of the first connecting plate.

[0009] Preferably, the second sealing ring and the third sealing ring are both installed on the outer surface of the first sealing plate, and the fourth sealing ring and the fifth sealing ring are both installed on the outer surface of the second sealing plate.

[0010] Preferably, the first sealing plate and the second sealing plate are fixedly connected through a first connecting plate, and the sixth sealing ring is arranged inside the second sealing plate.

[0011] Preferably, a key is fixedly connected to the surface of one end of the rotating shaft, and a current-limiting plate is fixedly connected to the surface of the other end of the rotating shaft.

[0012] Preferably, the key and the rotating shaft form a rotating structure, and the outer wall size of the valve stem matches the inner wall size of the gasket.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows: For this three-piece flange ball valve, through the settings of the first sealing plate, the second sealing ring, the third sealing ring, the first fixing plate, the second fixing plate, the bolt, the first connecting plate, the second sealing plate, the fourth sealing ring, the fifth sealing ring, the sixth sealing ring and the third fixing plate, during use, first, the first sealing plate is placed on the inner surface of the limit valve seat to ensure its close fit with the limit valve seat. Then, the second sealing ring and the third sealing ring are snap-connected to the outer surface of the first sealing plate to improve the sealing effect. Next, the first fixing plate is fixed to one side surface of the first sealing plate, and then the second fixing plate is connected to the first fixing plate to ensure the stability and sealing performance of both. On the outer surface of the second fixing plate, a bolt is fixedly connected, which can fix and adjust the first sealing plate and connect the first connecting plate. The first connecting plate is fixed to the outer surface of the second fixing plate, and then the second sealing plate is snap-connected to the outer surface of the first connecting plate. On the outer surface of the second sealing plate, the fourth sealing ring, the fifth sealing ring and the sixth sealing ring are also snap-connected to enhance the sealing effect. Finally, the third fixing plate is fixedly connected to one side surface of the second sealing plate to complete the assembly. When disassembly is required, just loosen the bolt, and each component can be removed one by one, which is convenient and fast. During the use process, when the valve stem drives the ball core to rotate, each sealing plate and sealing ring will cooperate closely to effectively prevent the leakage of the medium and ensure the normal operation of the valve. Through the settings of the key, the rotating shaft, the current-limiting plate, the gasket and the fixing block, during use, the gasket is sleeved on the outer surface of the valve stem, playing a role in sealing and buffering, and preventing the leakage of the medium and the wear of the valve stem. Then, the fixing block is fixedly connected to the lower surface of the valve stem to enhance the stability and supporting force of the valve stem and prevent the valve stem from shaking or shifting during the working process. When the water flow medium flows through the ball core, by rotating the key to drive the rotating shaft and the current-limiting plate to rotate, the angle of the current-limiting plate can be adjusted, thereby further controlling the flow rate of the water flow, and then playing a role in restricting and regulating the flow rate. Description of the Drawings

[0014] Figure 1 is a schematic diagram of the overall external structure of the present utility model;

[0015] Figure 2 is a schematic diagram of the sectional structure of the present utility model;

[0016] Figure 3 Structural schematic diagram of the sealing mechanism of the present utility model;

[0017] Figure 4 Structural schematic diagram of the flow-limiting mechanism of the present utility model.

[0018] In the figure: 1, valve body; 2, fixed valve seat; 3, flange; 4, first sealing ring; 5, limiting valve seat; 6, sealing mechanism; 601, first sealing plate; 602, second sealing ring; 603, third sealing ring; 604, first fixing plate; 605, second fixing plate; 606, bolt; 607, first connecting plate; 608, second sealing plate; 609, fourth sealing ring; 610, fifth sealing ring; 611, sixth sealing ring; 612, third fixing plate; 7, ball core; 8, valve stem; 9, flow-limiting mechanism; 901, rotating shaft; 902, turning key; 903, flow-limiting plate; 904, gasket; 905, fixing block; 10, second connecting plate; 11, compression nut; 12, handle; 13, fixing nut. Specific embodiments

[0019] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0020] Please refer to Figures 1-4 , the present utility model provides a technical solution: a three-piece flange ball valve, including a valve body 1, a fixed valve seat 2 is arranged on the outer surface of the valve body 1, a flange 3 is fixedly connected to one side surface of the fixed valve seat 2, a first sealing ring 4 is fixedly connected to the inner surface of the valve body 1, a limiting valve seat 5 is fixedly connected to one side surface of the first sealing ring 4, a sealing mechanism 6 is arranged on the inner surface of the limiting valve seat 5, a ball core 7 is fixedly connected to the inner surface of the valve body 1, a valve stem 8 is fixedly connected to the outer surface of the ball core 7, a flow-limiting mechanism 9 is arranged on the inner surface of the ball core 7, a second connecting plate 10 is fixedly installed on the outer surface of the valve stem 8, a compression nut 11 is threadedly connected to the outer surface of the valve stem 8, a handle 12 is snap-connected to the outer surface of the valve stem 8, and a fixing nut 13 is threadedly connected to the outer surface of the valve stem 8;

[0021] The sealing mechanism 6 includes a first sealing plate 601, a second sealing ring 602, a third sealing ring 603, a first fixing plate 604, a second fixing plate 605, a bolt 606, a first connecting plate 607, a second sealing plate 608, a fourth sealing ring 609, a fifth sealing ring 610, a sixth sealing ring 611 and a third fixing plate 612. The inner surface of the limit valve seat 5 is snap-connected with the first sealing plate 601. The outer surface of the first sealing plate 601 is snap-connected with the second sealing ring 602. The outer surface of the first sealing plate 601 is snap-connected with the third sealing ring 603. One side surface of the first sealing plate 601 is fixedly connected with the first fixing plate 604. One side surface of the first fixing plate 604 is fixedly connected with the second fixing plate 605. The outer surface of the second fixing plate 605 is fixedly connected with the bolt 606. The outer surface of the second fixing plate 605 is fixedly connected with the first connecting plate 607. The outer surface of the first connecting plate 607 is snap-connected with the second sealing plate 608. The outer surface of the second sealing plate 608 is snap-connected with the fourth sealing ring 609. The outer surface of the second sealing plate 608 is snap-connected with the fifth sealing ring 610. One side surface of the second sealing plate 608 is snap-connected with the sixth sealing ring 611. One side surface of the second sealing plate 608 is fixedly connected with the third fixing plate 612. Through the arrangement of the first sealing plate 601, the second sealing ring 602, the third sealing ring 603, the first fixing plate 604, the second fixing plate 605, the bolt 606, the first connecting plate 607, the second sealing plate 608, the fourth sealing ring 609, the fifth sealing ring 610, the sixth sealing ring 611 and the third fixing plate 612, during use, first, the first sealing plate 601 is placed on the inner surface of the limit valve seat 5 to ensure its close fit with the limit valve seat 5. Then, the second sealing ring 602 and the third sealing ring 603 are snap-connected to the outer surface of the first sealing plate 601 to improve the sealing effect. Next, the first fixing plate 604 is fixed to one side surface of the first sealing plate 601, and then the second fixing plate 605 is connected to the first fixing plate 604 to ensure the stability and sealing performance of both. On the outer surface of the second fixing plate 605, the bolt 606 is fixedly connected, which can fix and adjust the first sealing plate 601 and connect the first connecting plate 607. The first connecting plate 607 is fixed on the outer surface of the second fixing plate 605. Then, the second sealing plate 608 is snap-connected to the outer surface of the first connecting plate 607. On the outer surface of the second sealing plate 608, the fourth sealing ring 609, the fifth sealing ring 610 and the sixth sealing ring 611 are also snap-connected to enhance the sealing effect. Finally, the third fixing plate 612 is fixedly connected to one side surface of the second sealing plate 608 to complete the assembly. When disassembly is required, simply loosen the bolt 606, and then each component can be removed one by one, which is convenient and fast. During the use process, when the valve stem 8 drives the ball core 7 to rotate, each sealing plate and sealing ring will cooperate closely to effectively prevent the leakage of the medium and ensure the normal operation of the valve.

[0022] Further, the flow-limiting mechanism 9 includes a rotary key 902, a rotating shaft 901, a flow-limiting plate 903, a gasket 904, and a fixing block 905. The inside of the valve stem 8 is provided with the rotating shaft 901. One end surface of the rotating shaft 901 is fixedly connected with the rotary key 902, and one end surface of the rotating shaft 901 is fixedly connected with the flow-limiting plate 903. The outer surface of the valve stem 8 is sleeved and fixed with the gasket 904, and the lower surface of the valve stem 8 is fixedly connected with the fixing block 905. Through the arrangement of the rotary key 902, the rotating shaft 901, the flow-limiting plate 903, the gasket 904, and the fixing block 905, during use, the gasket 904 is sleeved on the outer surface of the valve stem 8, playing a role in sealing and buffering, preventing medium leakage and wear of the valve stem 8. Then, the fixing block 905 is fixedly connected to the lower surface of the valve stem 8, enhancing the stability and supporting force of the valve stem 8, preventing the valve stem 8 from shaking or shifting during the working process. When the water flow medium flows through the ball core 7, by rotating the rotary key 902 to drive the rotating shaft 901 and the flow-limiting plate 903 to rotate, the angle of the flow-limiting plate 903 is adjusted, further controlling the flow rate of the water flow, and then playing a role in limiting and regulating the flow rate.

[0023] Further, the bolts 606 are evenly distributed on one side surface of the second fixing plate 605, and the bolts 606 are evenly distributed on the outer surface of the first connecting plate 607. Through the arrangement of the bolts 606, during use, by adjusting the tightness of the bolts 606, the sealing effect can be further adjusted to adapt to different working environments and medium characteristics.

[0024] Further, the second sealing ring 602 and the third sealing ring 603 are both installed on the outer surface of the first sealing plate 601, and the fourth sealing ring 609 and the fifth sealing ring 610 are both installed on the outer surface of the second sealing plate 608. Through the arrangement of the first sealing plate 601, during use, it closely fits the valve body 1 to achieve the final layer of sealing effect on the water flow.

[0025] Further, the first sealing plate 601 and the second sealing plate 608 are fixedly connected through the first connecting plate 607, and the sixth sealing ring 611 is arranged inside the second sealing plate 608. Through the arrangement of the second sealing plate 608, during use, it achieves the first layer of sealing effect on the water flow.

[0026] Further, one end surface of the rotating shaft 901 is fixedly connected with the rotary key 902, and the other end surface of the rotating shaft 901 is fixedly connected with the flow-limiting plate 903. Through the arrangement of the rotary key 902, when it is necessary to limit and regulate the flow rate, rotating the rotary key 902 can facilitate and labor-saving operation.

[0027] Further, the rotary key 902 and the rotating shaft 901 form a rotating structure. The outer wall dimension of the valve stem 8 matches the inner wall dimension of the gasket 904. Through the arrangement of the gasket 904, the gasket 904 is sleeved on the outer surface of the valve stem 8, playing the roles of sealing and buffering.

[0028] Working principle: During use, first, the first sealing plate 601 is placed on the inner surface of the limit valve seat 5 to ensure it fits tightly with the limit valve seat 5. Then, the second sealing ring 602 and the third sealing ring 603 are snap-connected to the outer surface of the first sealing plate 601 to improve the sealing effect. Next, the first fixing plate 604 is fixed to one side surface of the first sealing plate 601, and then the second fixing plate 605 is connected to the first fixing plate 604 to ensure the stability and sealing performance of both. On the outer surface of the second fixing plate 605, the fixing connection bolt 606 is provided, which can fix and adjust the first sealing plate 601 and connect the first connecting plate 607. The first connecting plate 607 is fixed to the outer surface of the second fixing plate 605. Then, the second sealing plate 608 is snap-connected to the outer surface of the first connecting plate 607. On the outer surface of the second sealing plate 608, the fourth sealing ring 609, the fifth sealing ring 610, and the sixth sealing ring 611 are also snap-connected to enhance the sealing effect. Finally, the third fixing plate 612 is fixedly connected to one side surface of the second sealing plate 608 to complete the assembly. When disassembly is required, simply loosen the bolt 606, and each component can be removed one by one, which is convenient and fast. During use, when the valve stem 8 drives the ball core 7 to rotate, each sealing plate and sealing ring will cooperate closely to effectively prevent the leakage of the medium and ensure the normal operation of the valve. During use, the gasket 904 is sleeved on the outer surface of the valve stem 8, playing the roles of sealing and buffering, and preventing the leakage of the medium and the wear of the valve stem 8. Then, the fixing block 905 is fixedly connected to the lower surface of the valve stem 8 to enhance the stability and support force of the valve stem 8, preventing the valve stem 8 from shaking or shifting during operation. When the water flow medium passes through the ball core 7, the rotating key 902 is rotated to drive the rotating shaft 901 and the flow-limiting plate 903 to rotate, thereby adjusting the angle of the flow-limiting plate 903 and further controlling the flow rate of the water flow, and then playing the roles of limiting and regulating the flow rate.

[0029] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A three-piece flange ball valve, comprising a valve body (1), characterized in that: The outer surface of the valve body (1) is provided with a fixed valve seat (2), one side surface of the fixed valve seat (2) is fixedly connected to a flange (3), the inner surface of the valve body (1) is fixedly connected to a first sealing ring (4), one side surface of the first sealing ring (4) is fixedly connected to a limited valve seat (5), the inner surface of the limited valve seat (5) is provided with a sealing mechanism (6), the inner surface of the valve body (1) is fixedly connected to a ball core (7), the outer surface of the ball core (7) is fixedly connected to a valve stem (8), the inner surface of the ball core (7) is provided with a limited flow mechanism (9), the outer surface of the valve stem (8) is fixedly mounted with a second connecting plate (10), the outer surface of the valve stem (8) is threadedly connected to a clamping nut (11), the outer surface of the valve stem (8) is snap-fittedly connected to a handle (12), and the outer surface of the valve stem (8) is threadedly connected to a fixing nut (13); The sealing mechanism (6) comprises a first sealing plate (601), a second sealing ring (602), a third sealing ring (603), a first fixing plate (604), a second fixing plate (605), a bolt (606), a first connecting plate (607), a second sealing plate (608), a fourth sealing ring (609), a fifth sealing ring (610), a sixth sealing ring (611) and a third fixing plate (612); the inner surface of the limit valve seat (5) is snap-connected with the first sealing plate (601); the outer surface of the first sealing plate (601) is snap-connected with the second sealing ring (602); the outer surface of the first sealing plate (601) is snap-connected with the third sealing ring (603); and one side surface of the first sealing plate (601) is fixedly connected with the first fixing plate (612). 04), a second fixing plate (605) is fixedly connected to a side surface of the first fixing plate (604), a bolt (606) is fixedly connected to an outer surface of the second fixing plate (605), a first connecting plate (607) is fixedly connected to an outer surface of the second fixing plate (605), a second sealing plate (608) is snap-connected to an outer surface of the first connecting plate (607), a fourth sealing ring (609) is snap-connected to an outer surface of the second sealing plate (608), a fifth sealing ring (610) is snap-connected to an outer surface of the second sealing plate (608), a sixth sealing ring (611) is snap-connected to a side surface of the second sealing plate (608), and a third fixing plate (612) is fixedly connected to a side surface of the second sealing plate (608).

2. A three-piece flange ball valve according to claim 1, characterized in that: The flow limiting mechanism (9) comprises a rotary key (902), a rotating shaft (901), a flow limiting plate (903), a gasket (904) and a fixed block (905); the valve stem (8) is provided with a rotating shaft (901) inside, one end surface of the rotating shaft (901) is fixedly connected to the rotary key (902), one end surface of the rotating shaft (901) is fixedly connected to the flow limiting plate (903), the outer surface of the valve stem (8) is sleeved with a gasket (904), and the lower surface of the valve stem (8) is fixedly connected to the fixed block (905).

3. A three-piece flange ball valve according to claim 1, characterized in that: The bolts (606) are distributed at equal intervals on a side surface of the second fixing plate (605), and the bolts (606) are distributed at equal intervals on an outer side surface of the first connecting plate (607).

4. A three-piece flange ball valve according to claim 1, characterized in that: The second sealing ring (602) and the third sealing ring (603) are both installed on the outer surface of the first sealing plate (601), and the fourth sealing ring (609) and the fifth sealing ring (610) are both installed on the outer surface of the second sealing plate (608).

5. The three-piece flange ball valve according to claim 1, characterized in that: The first sealing plate (601) and the second sealing plate (608) are fixedly connected via a first connecting plate (607), and the sixth sealing ring (611) is arranged inside the second sealing plate (608).

6. A three-piece flange ball valve according to claim 2, characterized in that: The rotary key (902) and the rotating shaft (901) form a rotating structure, and the outer wall size of the valve stem (8) matches the inner wall size of the gasket (904).

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