High-pressure water delivery ball valve

Abstract

The utility model relates to a high-pressure water delivery ball valve which comprises a valve body, a valve cover is arranged on the valve body, a first valve seat is arranged in the valve body, a first disc spring is arranged between the first valve seat and the valve body, a second valve seat is arranged on the valve cover, a spherical valve element is arranged between the second valve seat and the first valve seat, and a valve rod is arranged on the spherical valve element and the valve body. A limiting ring is arranged on the valve rod, an anti-attrition gasket is arranged between the limiting ring and the valve body, a valve seat pressing plate is arranged on the second valve seat, first fixing bolts are arranged on the valve seat pressing plate and the valve deck, second fixing bolts are arranged on the valve deck and the valve body, and a spring energy storage sealing ring is arranged between the valve deck and the valve body. The ball valve element and the ball valve seat can be conveniently detached, and the positioning period of the ball valve element and the ball valve seat can be shortened. The utility model has the advantages of convenient use and wide market prospect.

Description

Technical Field

[0001] The utility model relates to the field of ball valves, in particular to a high-pressure water delivery ball valve. Background Art

[0002] A valve is a device used in a pipeline system to manage the operation mode of the flowing medium in the pipeline by controlling the opening and closing of the valve core. Due to the different working environments and functions, the shapes and working logic of the valve cores are also different. Therefore, valves are divided into different types such as ball valves, stop valves and gate valves according to the shape of the valve core. Because ball valves have many advantages, they are widely used among all kinds of valves. The advantages of ball valves are specifically manifested in the following points: First, high efficiency and low resistance; since the ball valve can be designed to be almost the same as the pipeline size after full opening, it is equivalent to the same pipeline being lengthened by one section, so almost no resistance other than the pipeline itself is generated, maximizing the flow efficiency. Second, it is simple to operate, quick to open and close, and easy to automate; the full opening and closing of the small-scale engineering ball valve can be limited to within 90°. As the angle of the control handle and the pipeline gradually changes from a straight angle to a right angle, the flow rate will gradually decrease from the maximum until it is completely cut off. And since all actions are controlled within a right angle, the opening and closing actions can be completed quickly. The valve core opening and closing range of large industrial ball valves is also 90°. The opening angle or quick opening and closing can be controlled by electric, pneumatic and hydraulic means, and it is easy to control remotely. Third, it is durable and reliable, with a long service life. When the sealing material is not all metal, the seal is particularly reliable and durable, and because the seal is always in contact with the ball, the sealing material has little contact with highly corrosive media in the pipeline that can easily cause the seal to fail. Fourth, it is small in size and easy to maintain. The ball valve is the valve with the largest flow and the smallest installation size under the same inner diameter. Fifth, there are many categories and a wide range of applications. Straight-through ball valves can be used for cutting, three-way or multi-way ball valves can be used for medium distribution and operation route management, and V-shaped ball valves can be used for flow management.

[0003] In the high-pressure liquid flow condition with circulating water as the medium, the straight-through ball valve is often selected as the shut-off valve due to its simple structure, convenient operation and lower purchase price than other types of shut-off valves. However, since the applicable medium is high-pressure circulating water, the friction between the ball valve core and the valve seat on the side away from the inlet end of the valve body will be very large during the opening and closing of the ball valve. This is mainly because the upstream medium is a high-pressure system and the pressure between the ball valve core and the valve seat on the side away from the inlet end of the valve body will gradually decrease or increase due to the influence of the upstream medium during the opening and closing process of the ball valve. When the pressure between the ball valve core and the valve seat on the side away from the inlet end of the valve body is maintained in a larger pressure range, the friction between the ball valve core and the valve seat on the side away from the inlet end of the valve body is also in a higher range. The rotation of the ball valve core within the higher friction range will increase the wear between the ball valve core and the valve seat on the side away from the inlet end of the valve body, resulting in leakage. This is one of the main factors that cause failures in high-pressure circulating water. In response to this phenomenon, the shut-off ball valve used in the high-pressure circulating water system needs to be repaired frequently. Although the existing ball valve has a simpler structure than other types of valves, it is still time-consuming and labor-intensive to achieve the installation and positioning between the ball valve core and the valve seat during the final reinstallation after the ball valve is repaired. It is necessary to make targeted improvements to the shut-off ball valve used in the high-pressure circulating water system in order to achieve rapid installation and positioning between the ball valve core and the valve seat after maintenance, thereby shortening the maintenance cycle and better meeting market demand. Summary of the invention

[0004] In view of the deficiencies in the prior art, the utility model provides a high-pressure water delivery ball valve which can facilitate the disassembly of the ball valve core and the ball valve seat and can shorten the positioning cycle of the ball valve core and the ball valve seat, so as to overcome the defects in the prior art.

[0005] The technical scheme adopted by the utility model is: a high-pressure water delivery ball valve, comprising a valve body, a valve cover is arranged on the valve body, a first valve seat is arranged on the inner side of the valve body close to one end of the valve cover, a first disc spring is arranged between the first valve seat and the valve body, a second valve seat is arranged on one end of the valve cover close to the valve body, a spherical valve core is arranged between the second valve seat and the first valve seat, a valve stem is arranged on the spherical valve core and the valve body, a limiting ring is arranged on the valve stem, a friction-reducing gasket is arranged between the limiting ring and the valve body, a valve seat pressing plate is sleeved on one side of the second valve seat close to the spherical valve core, the shape of the second valve seat close to one end of the valve seat pressing plate matches the shape of part of the inner cavity of the valve seat pressing plate, part of the inner cavity of the second valve seat and part of the inner cavity of the valve seat pressing plate both match part of the outer shape of the spherical valve core, a first fixing bolt is arranged on the valve seat pressing plate and the valve cover, a second fixing bolt is arranged on the valve cover and the valve body, and a spring energy storage sealing ring is arranged between the valve cover and the valve body.

[0006] Preferably, a packing sealing groove is provided on the valve body, and the packing sealing groove extends along the direction from the top of the valve body to the spherical valve core. A packing pressure plate is provided above the packing sealing groove. The packing sealing groove and the packing pressure plate are both mounted on the valve stem. Braided graphite packing and flexible graphite packing are alternately provided on the valve stem on the inner side of the packing sealing groove from top to bottom.

[0007] Preferably, the packing pressure plate and the valve body are provided with adjusting bolts, and the number of the adjusting bolts is several, and the several adjusting bolts are evenly distributed in a star shape on the outside of the center axis of the valve stem, and a second disc spring is respectively provided between each adjusting bolt and the packing pressure plate.

[0008] Preferably, the number of the first fixing bolts and the number of the second fixing bolts are both multiple, and the multiple first fixing bolts and the multiple second fixing bolts are uniformly distributed in a star shape outside the central axis of the inner cavity of the second valve seat.

[0009] Preferably, an adapter sleeve is provided on the outer side of the valve stem, a lower bracket is provided on the valve body, an upper bracket is provided above the lower bracket, the lower bracket includes a first support plate, the upper bracket includes a second support plate, third fastening bolts are provided on the first support plate and the second support plate, the first support plate and the second support plate are both located on the outer side of the adapter sleeve, and sliding bearings are provided on the second support plate and the adapter sleeve.

[0010] Preferably, an electric drive mechanism is provided on the upper bracket, the electric drive mechanism is transmission-connected to the valve stem, and a fourth fastening bolt is provided on the lower bracket and the valve body.

[0011] The utility model has the following beneficial effects: firstly, the utility model disassembles the second fixing bolt to facilitate disassembly of the valve body and the valve cover, and then facilitates disassembly of the spherical valve core and the valve stem, thereby replacing the friction-reducing gasket and the spherical valve core on the valve stem, and then replaces the second valve seat by disassembling the first fixing bolt, and then installs the first fixing bolt again to install the second valve seat on the valve cover, and after the valve cover is installed on the valve body and the second fixing bolt is installed, the spherical valve core is positioned in the second valve seat and the first valve seat. Thus, it is easy to disassemble the spherical valve core and the second valve seat and shortens the positioning process of the spherical valve core in the second valve seat and the first valve seat.

[0012] Secondly, a spring energy storage sealing ring is arranged between the valve cover and the valve body of the utility model; installing the spring energy storage sealing ring facilitates sealing the gap between the valve cover and the valve body.

[0013] Finally, a lower bracket is arranged on the valve body of the utility model, an upper bracket is arranged above the lower bracket, the lower bracket includes a first support plate, the upper bracket includes a second support plate, and third fastening bolts are arranged on the first support plate and the second support plate; by arranging the third fastening bolts, it is convenient to disassemble the lower bracket and the upper bracket.

[0014] The utility model has the advantages of simple structure, convenient operation, ingenious design, greatly improved working efficiency, good social and economic benefits, and is a product that is easy to promote and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model.

[0016] Figure 2 for Figure 1 A partial enlarged schematic diagram of detail A.

[0017] Figure 3 It is a structural schematic diagram of the utility model. DETAILED DESCRIPTION

[0018] like Figures 1 to 3 As shown, a high-pressure water delivery ball valve comprises a valve body 1, a valve cover 2 is arranged on the valve body 1, a first valve seat 3 is arranged on the inner side of the valve body 1 near one end of the valve cover 2, a mounting channel matched with the first valve seat 3 is arranged on the valve body 1, the mounting channel is located on the first channel, a first disc spring 4 is arranged in the mounting channel between the first valve seat 3 and the valve body 1, a second valve seat 5 is arranged on one end of the valve cover 2 near the valve body 1, a spherical valve core 6 is arranged between the second valve seat 5 and the first valve seat 3, a first channel is arranged in the valve body 1, a second channel is arranged in the valve cover 2, the central axis of the second channel, the central axis of the first channel and the central axis of the inner cavity of the spherical valve core 6 are located on the same axis, and the second channel and the first channel are located on the same axis. The first passage is connected through the inner cavity of the spherical valve core 6, the spherical valve core 6 and the valve body 1 are provided with a valve stem 7, a limit ring 8 is provided on the valve stem 7, and a friction-reducing gasket 9 is provided between the limit ring 8 and the valve body 1. A valve seat pressing plate 10 is mounted on the side of the second valve seat 5 close to the spherical valve core 6, and the shape of the end of the second valve seat 5 close to the valve seat pressing plate 10 matches the shape of part of the inner cavity of the valve seat pressing plate 10, and part of the inner cavity of the second valve seat 5 and part of the inner cavity of the valve seat pressing plate 10 match the part of the outer shape of the spherical valve core 6. A first fixing bolt 11 is provided on the valve seat pressing plate 10 and the valve cover 2, and a second fixing bolt 12 is provided on the valve cover 2 and the valve body 1, and a spring energy storage sealing ring 13 is provided between the valve cover 2 and the valve body 1. The number of the first fixing bolts 11 and the number of the second fixing bolts 12 are both multiple, and the multiple first fixing bolts 11 and the multiple second fixing bolts 12 are uniformly distributed in a star shape on the outside of the central axis of the inner cavity of the second valve seat 5.

[0019] A packing sealing groove 14 is provided on the valve body 1, and the packing sealing groove 14 extends from the top of the valve body 1 to the spherical valve core 6. A packing pressure plate 15 is provided above the packing sealing groove 14. The packing sealing groove 14 and the packing pressure plate 15 are both mounted on the valve stem 7. Braided graphite packing 16 and flexible graphite packing 17 are alternately provided on the valve stem 7 inside the packing sealing groove 14 from top to bottom. The installation of the braided graphite packing 16 and the flexible graphite packing 17 reduces the gap between the valve stem 7 and the valve body 1. However, as the valve stem 7 performs opening and closing actions many times, the braided graphite packing 16 and the flexible graphite packing 17 will wear out, thereby causing the gap between the valve stem 7 and the valve body 1 to increase again. Therefore, to be more specific, the packing pressure plate 15 and the valve body 1 described in this product are provided with adjusting bolts 18, and the number of the adjusting bolts 18 is several. A number of adjusting bolts 18 are evenly distributed in a star shape on the outside of the center axis of the valve stem 7. The installation of a number of adjusting bolts 18 increases the force application points on the packing pressure plate 15, thereby improving the force uniformity of the packing pressure plate 15; further, a second disc spring 19 is respectively arranged between each adjusting bolt 18 and the packing pressure plate 15, and the second disc spring 19 is installed on the adjusting bolt 18; after the second disc spring 19 is installed on the adjusting bolt 18, the positions of the number of adjusting bolts 18 are adjusted so that the number of second disc springs 19 are compressed, so that the packing pressure plate 15 obtains the pressure provided by the number of second disc springs 19, and then the packing pressure plate 15 maintains to provide pressure to the braided graphite packing 16 and the flexible graphite packing 17, so that the braided graphite packing 16 or the flexible graphite packing 17 is deformed again under the pressure provided by the packing pressure plate 15 after being worn, thereby reducing the gap between the valve stem 7 and the valve body 1.

[0020] An adapter sleeve 20 is arranged on the outside of the valve stem 7, a lower bracket 21 is arranged on the valve body 1, an upper bracket 22 is arranged above the lower bracket 21, the lower bracket 21 includes a first support plate, the upper bracket 22 includes a second support plate, and third fastening bolts 23 are arranged on the first support plate and the second support plate, and the first support plate and the second support plate are both located on the outside of the adapter sleeve 20, and sliding bearings 24 are arranged on the second support plate and the adapter sleeve 20; after the sliding bearing 24 is installed, the position of the adapter sleeve 20 is limited, and then the position of the valve stem 7 is limited; combined with the limit ring 8 installed on the valve stem 7 and the friction-reducing washer 9 installed between the limit ring 8 and the valve body 1, the further position of the valve stem 7 is limited, which reduces the deviation between the axis around which the valve stem 7 rotates when the valve stem 7 performs the opening and closing actions and the center axis of the valve stem 7, thereby reducing the wear of the valve stem 7. The upper bracket 22 is provided with an electric drive mechanism 25 , which is transmission-connected to the valve stem 7 , and the lower bracket 21 and the valve body 1 are provided with a fourth fastening bolt 26 ; installing the fourth fastening bolt 26 facilitates the removal of the lower bracket 21 from the valve body 1 .

[0021] The usage of this product is as follows: Figures 1 to 3 As shown, the following steps are included:

[0022] This product is installed in the preset position. During the opening process of this product from the closed state to the open state, the valve stem 7 receives the power delivered by the electric drive mechanism 25 and performs a rotation action. During this period, the inner cavity of the valve body 1 is connected with the upstream circulating water system, and the inner cavity of the valve cover 2 is connected with the downstream circulating water system. The upstream circulating water system cannot be connected with the downstream circulating water system due to the obstruction of the spherical valve core 6 in the closed state, and there is a pressure difference between the downstream circulating water system and the upstream circulating water system; the high-pressure circulating water in the upstream circulating water system is blocked by the spherical valve core 6, and the high-pressure circulating water exerts pressure on the spherical valve core 6, thereby causing the spherical valve core 6 to fit closely with the second valve seat 5. The valve stem 7 receives the power delivered by the electric drive mechanism 25, and needs to overcome the friction caused by the pressure exerted by the high-pressure circulating water on the spherical valve core 6, which causes the spherical valve core 6 to fit closely with the second valve seat 5 to complete the opening action of the valve stem 7 driving the spherical valve core 6. In the inner cavity of the valve cover 2 and the inner cavity of the valve body 1 without the spherical valve core 6 Before the inner cavity is connected, at this time, the pressure on the spherical valve core 6 caused by the pressure difference between the downstream circulating water system and the upstream circulating water is at the maximum value, and when the inner cavity of the valve cover 2 and the inner cavity of the valve body 1 are connected through the inner cavity of the spherical valve core 6, the upstream circulating water system and the downstream circulating water system are connected, and the pressure difference between the upstream circulating water system and the downstream circulating water system gradually decreases until the spherical valve core 6 reaches the open state. At this time, the central axis of the inner cavity of the spherical valve core 6, the central axis of the second channel of the valve cover 2 and the central axis of the first channel of the valve body 1 are on the same axis. At this time, the pressure on the spherical valve core 6 caused by the pressure difference between the upstream circulating water system and the downstream circulating water system is at the minimum value. During the opening process, wear will occur between the spherical valve core 6 and the second valve seat 5. Since the inner end of the valve stem 7 is installed on the spherical valve core 6, the tendency of the valve stem 7 to slightly deviate is offset due to the obstruction of the friction-reducing washer 9, but during the opening process of the valve stem 7, the friction-reducing washer 9 will still be worn.

[0023] During the closing process from the open state to the closed state, the spherical valve core 6 continues to receive the transmission force transmitted by the valve stem 7, and the central axis of the inner cavity of the spherical valve core 6 continues to rotate. When the central axis of the second channel of the valve cover 2 and the central axis of the first channel of the valve body 1 are both perpendicular to the central axis of the inner cavity of the spherical valve core 6, the spherical valve core 6 reaches the closed state. At this time, the pressure caused by the pressure difference between the downstream circulating water system and the upstream circulating water on the spherical valve core 6 gradually increases as the closing process proceeds. During the closing process, the spherical valve core 6, the friction-reducing gasket 9 and the second valve seat 5 will wear again.

[0024] When the product has executed the preset number of opening and closing times, the product needs to be repaired. The specific process is to remove the lower bracket 21 and the valve cover 2 from the valve body 1, and then remove the valve stem 7, the spherical valve core 6 and the second valve seat 5. After replacing the friction-reducing gasket 9 and the spherical valve core 6 on the valve stem 7 and removing the valve seat pressure plate 10 to replace the second valve seat 5, the lower bracket 21 and the valve cover 2 are installed on the valve body 1 again. During the process of installing the valve cover 2 on the valve body 1, the spherical valve core 6 is located between the first valve seat 3 and the second valve seat 5. As the valve cover 2 is gradually installed to the preset position on the valve body 1, the first disc spring 4 is gradually compressed, and the spherical valve core 6 is gradually guided to the preset installation position due to the guidance from the first valve seat 3 and the second valve seat 5. When the valve cover 2 is installed to the preset position of the valve body 1, the spherical valve core 6 is also in the corrected installation position.

[0025] According to this embodiment, the valve body 1 and the valve cover 2 are easily disassembled by disassembling the second fixing bolt 12, and then the spherical valve core 6 and the valve stem 7 are easily disassembled, so as to replace the friction-reducing gasket 9 and the spherical valve core 6 on the valve stem 7, and then the second valve seat 5 is replaced by disassembling the first fixing bolt 11, and then the first fixing bolt 11 is installed again to install the second valve seat 5 on the valve cover 2, and after the valve cover 2 is installed on the valve body 1 and the second fixing bolt 12 is installed, the spherical valve core 6 is positioned in the second valve seat 5 and the first valve seat 3. Thus, it is easy to disassemble the spherical valve core 6 and the second valve seat 5 and shorten the positioning process of the spherical valve core 6 in the second valve seat 5 and the first valve seat 3.

[0026] The embodiments described above are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. Therefore, any equivalent changes or modifications made based on the structures, features and principles described in the patent scope of the present invention should be included in the patent application scope of the present invention.

Claims

1. A high-pressure water delivery ball valve, characterized in that: The valve body (1) comprises a valve cover (2) disposed on the valve body (1), a first valve seat (3) disposed on the inner side of one end of the valve body (1) close to the valve cover (2), a first disc spring (4) disposed between the first valve seat (3) and the valve body (1), a second valve seat (5) disposed on one end of the valve cover (2) close to the valve body (1), a spherical valve core (6) disposed between the second valve seat (5) and the first valve seat (3), a valve stem (7) disposed on the spherical valve core (6) and the valve body (1), a limit ring (8) disposed on the valve stem (7), a friction-reducing gasket (9) disposed between the limit ring (8) and the valve body (1), and a second valve seat (5) disposed on the inner side of the valve body (1) close to the valve cover (2), and a second valve seat (5) disposed on the inner side of the valve body (1) close to the valve cover (2), and a spherical valve core (6) disposed between the second valve seat (5) and the first valve seat (3). A valve seat pressure plate (10) is mounted on one side of the valve seat (5) close to the spherical valve core (6); the shape of one end of the second valve seat (5) close to the valve seat pressure plate (10) matches the shape of part of the inner cavity of the valve seat pressure plate (10); part of the inner cavity of the second valve seat (5) and part of the inner cavity of the valve seat pressure plate (10) match the partial outer shape of the spherical valve core (6); a first fixing bolt (11) is arranged on the valve seat pressure plate (10) and the valve cover (2); a second fixing bolt (12) is arranged on the valve cover (2) and the valve body (1); and a spring energy storage sealing ring (13) is arranged between the valve cover (2) and the valve body (1).

2. The high-pressure water delivery ball valve according to claim 1, characterized in that: The valve body (1) is provided with a packing sealing groove (14), the packing sealing groove (14) extending from the top of the valve body (1) to the spherical valve core (6), a packing pressure plate (15) is provided above the packing sealing groove (14), the packing sealing groove (14) and the packing pressure plate (15) are both mounted on the valve stem (7), and braided graphite packing (16) and flexible graphite packing (17) are alternately provided on the valve stem (7) inside the packing sealing groove (14) from top to bottom.

3. The high-pressure water delivery ball valve according to claim 2, characterized in that: The packing pressure plate (15) and the valve body (1) are provided with adjusting bolts (18), the number of the adjusting bolts (18) being a plurality, the plurality of adjusting bolts (18) being evenly distributed in a star shape on the outside of the center axis of the valve stem (7), and a second disc spring (19) being respectively provided between each adjusting bolt (18) and the packing pressure plate (15).

4. The high-pressure water delivery ball valve according to claim 1, characterized in that: The number of the first fixing bolts (11) and the number of the second fixing bolts (12) are both multiple, and the multiple first fixing bolts (11) and the multiple second fixing bolts (12) are evenly distributed in a star shape outside the central axis of the inner cavity of the second valve seat (5).

5. The high-pressure water delivery ball valve according to claim 1, characterized in that: An adapter sleeve (20) is arranged on the outside of the valve stem (7), a lower bracket (21) is arranged on the valve body (1), an upper bracket (22) is arranged above the lower bracket (21), the lower bracket (21) includes a first support plate, the upper bracket (22) includes a second support plate, third fastening bolts (23) are arranged on the first support plate and the second support plate, the first support plate and the second support plate are both located on the outside of the adapter sleeve (20), and sliding bearings (24) are arranged on the second support plate and the adapter sleeve (20).

6. The high-pressure water delivery ball valve according to claim 5, characterized in that: The upper bracket (22) is provided with an electric drive mechanism (25), the electric drive mechanism (25) and the valve stem (7) are drivingly connected, and the lower bracket (21) and the valve body (1) are provided with a fourth fastening bolt (26).

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