AH-level micro-leakage forging hard sealing ball valve

Abstract

The utility model discloses an AH-level micro-leakage forging hard sealing ball valve which comprises a main valve body, an auxiliary valve body, a valve cavity, a valve rod, a flow channel, a valve element, a sealing ring, an O-shaped ring, a packing cavity, a packing assembly, a packing gland, a pressing plate, a filter plate, a mounting groove, a mounting base, an upper locking unit and a positioning protruding block. The ball valve has the following advantages and effects that the detachable filter plate structure is innovatively arranged, the filter plate can effectively filter particle impurities in fluid, and the ball valve has the advantage of being convenient and fast to mount and dismount, so that the maintenance efficiency and the use convenience of the ball valve are remarkably improved.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, and particularly relates to an AH-class micro-leakage forged hard-sealed ball valve. Background Art

[0002] As an important fluid control device, ball valves have been widely used in industrial fields such as petrochemical, natural gas transportation, electric power, and metallurgy. Especially under the conditions of high pressure, high temperature, and corrosive media, forged hard-sealed ball valves have become a reliable valve choice due to their superior strength, sealing performance, and corrosion resistance. In recent years, with the gradually increasing requirements of industrial equipment for fluid control accuracy and sealing reliability, AH-class micro-leakage ball valves have received attention and promotion due to their extremely low leakage rate.

[0003] Although the existing AH-class forged hard-sealed ball valves can already meet the requirements of various working conditions in terms of performance, there are still some limitations in actual operation. Especially during long-term use, particulate impurities that may be carried in the fluid medium are likely to accumulate inside the valve. This not only affects the normal opening and closing actions of the ball valve but may also cause wear of the sealing surface, thereby affecting the sealing performance. In traditional designs, cleaning and maintenance often require disassembling the entire valve or some key components, which is time-consuming and laborious, increasing the downtime and maintenance costs.

[0004] Therefore, how to optimize the structural design of the ball valve on the basis of ensuring the sealing performance, so that it has higher maintainability and more convenient cleaning ability, is an important problem that the existing technology urgently needs to solve. Content of the Utility Model

[0005] The purpose of the utility model is to provide an AH-class micro-leakage forged hard-sealed ball valve to solve the problems raised in the background art.

[0006] The above technical purpose of the utility model is achieved through the following technical solutions:

[0007] An AH-class micro-leakage forged hard-sealed ball valve includes a main valve body and a sub-valve body that are fixed to each other. A vertical valve cavity is provided inside the main valve body, and a valve stem is provided in the valve cavity. A flow channel is cooperatively formed inside the main valve body and the sub-valve body. A valve core located in the flow channel is fixedly provided at the lower end of the valve stem, and the valve core has the function of controlling the connection or cut-off of the flow channel.

[0008] A sealing ring and an O-ring are provided between the main valve body and the sub-valve body.

[0009] A packing cavity is provided at the top of the main valve body, and a packing assembly is provided in the packing cavity. A packing gland is provided at the upper end of the packing cavity, and a pressing plate is provided at the upper end of the packing gland.

[0010] It further includes a filter plate. The left side of the flow channel is the inlet side, and the filter plate can be pushed into the flow channel from the inlet side of the flow channel. An installation groove is formed in the upper half of the auxiliary valve body, and an installation seat is fixedly arranged in the installation groove. An upper locking unit is arranged in the installation seat. A positioning convex block extending into the flow channel is fixedly arranged in the lower half of the auxiliary valve body. After the filter plate is pushed to the inlet side of the flow channel, its lower end will abut against the positioning convex block for positioning. After the lower end of the filter plate abuts against the positioning convex block, its upper end is locked by the upper locking unit.

[0011] Further, an installation inner cavity is formed in the installation seat, a locking piece is slidably arranged in the installation inner cavity, and a main spring for applying a downward moving force to the locking piece is arranged in the installation inner cavity. The locking piece includes a first clamping block and a second clamping block which are fixed together. A clamping area for the upper end of the filter plate to extend into is formed between the first clamping block and the second clamping block.

[0012] Further, the first clamping block is located on the left side of the second clamping block, and an inclined pressure-receiving inclined surface is formed on the left side of the first clamping block.

[0013] Further, notches are respectively formed at the lower ends of the sides of the first clamping block and the second clamping block facing the clamping area.

[0014] Further, the locking piece further includes a locking push plate. The first clamping block and the second clamping block are both fixed at the lower end of the locking push plate. Vertical left side plates and right side plates are respectively fixed on both sides of the locking push plate. An extension plate is fixedly arranged on the right side of the right side plate. The left side plate and the extension plate are respectively attached to the two side walls of the installation inner cavity to ensure stable vertical movement of the locking piece. The main spring extends into the area between the left side plate and the right side plate.

[0015] Further, an anti-dislodging block is fixedly arranged on the right side wall of the installation inner cavity. The anti-dislodging block can collide with the extension plate to prevent the locking piece from falling into the flow channel.

[0016] A limiting step located above the extension plate and capable of colliding with the extension plate is arranged on the right side wall of the installation inner cavity.

[0017] Further, a recessed opening is formed at the lower end of the right side of the extension plate. A recessed area is formed between the recessed opening and the anti-dislodging block. A sub-vent hole that is always communicated with the recessed area is formed in the right side wall of the installation seat. A mother vent hole extending into the auxiliary valve body is formed on the surface of the auxiliary valve body. An inner hole communicating the mother vent hole and the sub-vent hole is formed in the auxiliary valve body. The gas fed through the mother vent hole can continuously enter the recessed area.

[0018] Further configuration is that a force-bearing column is fixedly provided on the upper end of the locking push plate, two embedded columns are fixedly provided on the upper end of the mounting seat, an embedded interval is formed between the two embedded columns, the force-bearing column is adapted to the embedded interval, a force-bearing groove is provided on the upper end of the force-bearing column, a secondary spring is provided in the force-bearing groove, and the upper end of the secondary spring extends into the embedded interval.

[0019] The beneficial effects of the utility model are:

[0020] 1. In the utility model, a sealing ring and an O-ring are arranged between the main valve body and the auxiliary valve body to ensure that the connection between the main valve body and the auxiliary valve body meets the requirements of AH-level micro-leakage; the arrangement of the packing assembly enables the leakage at the packing cavity to meet the requirements of AH-level micro-leakage; the filter plate can filter out the particulate impurities that may be carried in the fluid medium to avoid accumulation inside the valve; at the same time, the filter plate has the function of convenient installation and disassembly, which is convenient for cleaning the filter plate later; the positioning protrusion serves the purpose of positioning the filter plate and fixing the lower end of the filter plate, and the upper locking unit can lock the filter plate.

[0021] 2. In the present invention, the locking member can move downward under the force of the main spring, so that the upper end of the filter plate can extend into the clamping area and be clamped by the first clamping block and the second clamping block.

[0022] 3. In the present invention, the pressure-bearing inclined surface on the left side of the first clamping block can be compressed during the process of pushing the filter plate into the flow channel, so that the first clamping block and the second clamping block move up together, thereby allowing the filter plate to move smoothly to the clamping area.

[0023] 4. In the present invention, the gaps between the first clamping block and the second clamping block can guide the filter plate, allowing the upper end of the filter plate to better extend into the clamping area.

[0024] 5. In the present invention, the left side plate and the extension plate are respectively attached to the two side walls of the installation cavity to ensure the stable vertical movement of the locking member.

[0025] 6. In the present invention, the anti-fall-out block can collide with the extension plate to prevent the locking piece from falling into the flow channel.

[0026] 7. In the present invention, gas can be continuously introduced into the recessed area through the female vent hole, thereby driving the locking member to move upward to release the lock on the filter plate.

[0027] 8. In the present utility model, a secondary spring is provided to ensure that the locking member can still be pushed down when the main spring fails.

[0028] In summary, the utility model innovatively arranges a detachable filter plate structure inside the ball valve. The filter plate can effectively filter particulate impurities in the fluid and has the advantages of convenient installation and disassembly, thereby significantly improving the maintenance efficiency and convenience of the ball valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a schematic structural diagram of an embodiment;

[0030] Figure 2 is Figure 1 an enlarged view of part A in;

[0031] Figure 3 is Figure 1 an enlarged view of part B in;

[0032] Figure 4 is Figure 1 an enlarged view of part B in;

[0033] Figure 5 is Figure 4 an enlarged view of part D in;

[0034] Figure 6 is Figure 1 an enlarged view of part E in.

[0035] In the figure: 11, main valve body; 12, sub-valve body; 13, valve stem; 14, flow channel; 15, valve core; 21, sealing ring; 22, O-ring; 31, packing chamber; 32, packing gland; 33, pressing plate; 341, first square braided packing; 342, upper wedge-shaped pad; 343, double-angle upper sealing ring; 344, 45-degree sealing ring; 345, double-angle lower sealing ring; 346, lower wedge-shaped pad; 347, second square braided packing; 41, filter plate; 50, positioning convex block; 51, installation groove; 511, installation seat; 52, installation inner cavity; 53, main spring; 61, first clamping block; 611, pressure-receiving inclined surface; 612, notch; 62, second clamping block; 63, clamping area; 64, locking push plate; 651, left side plate; 652, right side plate; 653, extension plate; 66, anti-disengagement block; 67, limiting step; 71, recessed area; 72, sub-vent hole; 73, mother vent hole; 74, inner hole; 81, stress column; 82, stress groove; 83, embedding column; 84, sub-spring; 91, pull handle. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0036] The present utility model will be further described in detail below with reference to the accompanying drawings.

[0037] As shown in the attached Figures 1 to 6 drawings;

[0038] This embodiment discloses an AH-class micro-leakage forged hard-sealed ball valve, which includes a main valve body 11 and a sub-valve body 12 fixed to each other. The main valve body 11 and the sub-valve body 12 are forged, and are fixed by bolts between the main valve body 11 and the sub-valve body 12. A vertical valve cavity is provided in the main valve body 11, and a valve stem 13 is provided in the valve cavity. A flow channel 14 is cooperatively provided inside the main valve body 11 and the sub-valve body 12. A valve core 15 located in the flow channel 14 is fixedly provided at the lower end of the valve stem 13. The valve core 15 functions to control the connection or cut-off of the flow channel 14.

[0039] A sealing ring 21 and an O-ring 22 are provided between the main valve body 11 and the sub-valve body 12 to ensure that the connection between the main valve body 11 and the sub-valve body 12 meets the requirements of AH-class micro-leakage.

[0040] A stuffing box 31 is provided at the top of the main valve body 11. A stuffing assembly is provided in the stuffing box 31. A stuffing gland 32 is provided at the upper end of the stuffing box 31, and a pressing plate 33 is provided at the upper end of the stuffing gland 32. The stuffing assembly includes a first square braided packing 341, an upper wedge-shaped pad 342, a double-angle upper sealing ring 343, a 45-degree sealing ring 344, a double-angle lower sealing ring 345, a lower wedge-shaped pad 346, and a second square braided packing 347 arranged in sequence from top to bottom, so that the leakage amount at the stuffing box 31 can meet the requirements of AH-class micro-leakage.

[0041] It further includes a filter plate 41. The left side of the flow channel 14 is the inlet side. The filter plate 41 can be pushed into the flow channel 14 from the inlet side of the flow channel 14. An installation groove 51 is provided in the upper half of the sub-valve body 12. An installation seat 511 is fixedly provided in the installation groove 51, and an upper locking unit is provided in the installation seat 511. A positioning convex block 50 extending into the flow channel 14 is fixedly provided in the lower half of the sub-valve body 12. After the filter plate 41 is pushed into the inlet side of the flow channel 14, its lower end will abut against the positioning convex block 50 for positioning. After the lower end of the filter plate 41 abuts against the positioning convex block 50, its upper end is locked by the upper locking unit.

[0042] It should be noted that a number of filter holes are provided in the filter plate 41; a pull handle 91 for convenient pulling out is provided on the left side of the filter plate 41.

[0043] Among them, an installation inner cavity 52 is provided in the installation seat 511. A locking member is slidably provided in the installation inner cavity 52, and a main spring 53 for applying a downward moving force to the locking member is provided in the installation inner cavity 52. The locking member includes a first clamping block 61 and a second clamping block 62 fixed to each other. A clamping area 63 for the upper end of the filter plate 41 to extend into is formed between the first clamping block 61 and the second clamping block 62.

[0044] Among them, the first clamping block 61 is located on the left side of the second clamping block 62, and an inclined pressure-receiving inclined surface 611 is provided on the left side of the first clamping block 61.

[0045] The first clamping block 61 and the second clamping block 62 are provided with a notch 612 at their lower ends facing the clamping area 63, so that the upper end of the filter plate 41 can be better extended into the clamping area 63.

[0046] Among them, the locking member also includes a locking push plate 64, the first clamping block 61 and the second clamping block 62 are fixed at the lower end of the locking push plate 64, and the two sides of the locking push plate 64 are respectively fixed with a vertical left plate 651 and a right plate 652, and the right side of the right plate 652 is fixed with an extension plate 653, and the left plate 651 and the extension plate 653 are respectively attached to the two side walls of the installation cavity 52 to ensure the stable vertical movement of the locking member; the main spring 53 extends into the area between the left plate 651 and the right plate 652.

[0047] Among them, the right side wall of the installation cavity 52 is fixedly provided with an anti-falling block 66, which can collide with the extension plate 653 to prevent the locking member from falling into the flow channel 14;

[0048] The right side wall of the installation cavity 52 is provided with a limiting step 67 which is located above the extension plate 653 and can collide with the extension plate 653.

[0049] Among them, a recessed opening is provided at the lower end of the right side of the extension plate 653, and a recessed area 71 is formed between the recessed opening and the anti-slip block 66. A sub-vent 72 which is always in communication with the recessed area 71 is provided in the right side wall of the mounting seat 511, and a mother vent 73 which extends into the interior of the sub-valve body 12 is provided on the surface of the sub-valve body 12, and an inner hole 74 which connects the mother vent 73 and the sub-vent 72 is provided in the sub-valve body 12, so that the gas introduced through the mother vent 73 can continuously pass into the recessed area 71.

[0050] Among them, a force-bearing column 81 is fixedly provided on the upper end of the locking push plate 64, and two embedded columns 83 are fixedly provided on the upper end of the mounting seat 511, and an embedded interval is formed between the two embedded columns 83. The force-bearing column 81 is adapted to the embedded interval, and a force-bearing groove 82 is opened on the upper end of the force-bearing column 81. A secondary spring 84 is arranged in the force-bearing groove 82, and the upper end of the secondary spring 84 extends into the embedded interval.

[0051] Installation process of filter plate 41:

[0052] 1. Push the filter plate 41 into the flow channel 14 from the inlet side on the left side of the flow channel 14 until the lower end of the filter plate 41 abuts against the positioning protrusion 50 for positioning. At this time, the upper end of the filter plate 41 can just extend into the clamping area 63, and the two sides of the filter plate 41 abut against the first clamping block 61 and the second clamping block 62 respectively for locking.

[0053] ​​​2. The pressure-receiving inclined surface 611 on the left side of the first clamping block 61 can be pressed during the process of pushing the filter plate 41 into the flow channel 14, so that the first clamping block 61 and the second clamping block 62 move upward together, and then the filter plate 41 can be smoothly moved to the clamping area 63.

[0054] 3. Along the flow direction of the fluid medium, the lower end of the filter plate 41 abuts against the positioning convex block 50, and the upper end is located in the clamping area 63, with good stability.

[0055] The disassembly process of the filter plate 41:

[0056] Gas is introduced into the female vent hole 73, and the gas can be continuously introduced into the recessed area 71 after passing through the female vent hole 73, the inner hole 74 and the male vent hole 72 in sequence, thereby driving the locking member to move upward, and then the filter plate 41 can be pulled out.

[0057] This specific embodiment is only an explanation of the present invention, and it is not a limitation of the present invention. After reading this specification, those skilled in the art can make modifications to this embodiment without creative contributions as needed, but as long as it is within the scope of the claims of the present invention, it is protected by the patent law.

Claims

1. An AH-class micro-leakage forged hard-sealed ball valve, comprising a main valve body (11) and an auxiliary valve body (12) fixed to each other, characterized in that: A vertical valve cavity is arranged in the main valve body (11), and a valve stem (13) is arranged in the valve cavity. A flow channel (14) is formed in the main valve body (11) and the auxiliary valve body (12). A valve core (15) located in the flow channel (14) is fixedly arranged at the lower end of the valve stem (13). The valve core (15) has the function of controlling the flow channel (14) to be connected or cut off. A sealing ring (21) and an O-ring (22) are provided between the main valve body (11) and the auxiliary valve body (12); A packing cavity (31) is arranged at the top of the main valve body (11), and a packing assembly is arranged in the packing cavity (31). A packing gland (32) is arranged at the upper end of the packing cavity (31), and a pressure plate (33) is arranged at the upper end of the packing gland (32); It also includes a filter plate (41), the left side of the flow channel (14) being the inlet side, and the filter plate (41) can be pushed into the flow channel (14) from the inlet side of the flow channel (14); the upper half of the auxiliary valve body (12) is provided with a mounting groove (51), a mounting seat (511) is fixedly arranged in the mounting groove (51), and an upper locking unit is arranged in the mounting seat (511); the lower half of the auxiliary valve body (12) is fixedly provided with a positioning protrusion (50) extending into the flow channel (14), and after the filter plate (41) is pushed into the inlet side of the flow channel (14), its lower end will abut against the positioning protrusion (50) for positioning; when the lower end of the filter plate (41) abuts against the positioning protrusion (50), its upper end is locked by the upper locking unit.

2. The AH-class micro-leakage forged hard-sealed ball valve according to claim 1, characterized in that: The mounting seat (511) is provided with a mounting inner cavity (52), a locking member is slidably arranged in the mounting inner cavity (52), and a main spring (53) is arranged in the mounting inner cavity (52) for applying a force for the locking member to move downward; the locking member comprises a first clamping block (61) and a second clamping block (62) which are fixed to each other, and a clamping area (63) for the upper end of the filter plate (41) to extend into is formed between the first clamping block (61) and the second clamping block (62).

3. The AH-class micro-leakage forged hard-sealed ball valve according to claim 2, characterized in that: The first clamping block (61) is located on the left side of the second clamping block (62), and an inclined pressure-bearing slope (611) is provided on the left side of the first clamping block (61).

4. The AH-class micro-leakage forged hard-sealed ball valve according to claim 2, characterized in that: A notch (612) is provided at the lower end of the first clamping block (61) and the second clamping block (62) on the side facing the clamping area (63).

5. The AH-class micro-leakage forged hard-sealed ball valve according to claim 2, characterized in that: The locking member also includes a locking push plate (64), the first clamping block (61) and the second clamping block (62) are both fixed at the lower end of the locking push plate (64), and the two sides of the locking push plate (64) are respectively fixed with a vertical left plate (651) and a right plate (652), and the right side of the right plate (652) is fixed with an extension plate (653), and the left side plate (651) and the extension plate (653) are respectively affixed to the two side walls of the installation cavity (52) to ensure stable vertical movement of the locking member; the main spring (53) extends into the area between the left side plate (651) and the right side plate (652).

6. The AH-class micro-leakage forged hard-sealed ball valve according to claim 5, characterized in that: The right side wall of the installation inner cavity (52) is fixedly provided with an anti-falling-out block (66), and the anti-falling-out block (66) can collide with the extension plate (653) to prevent the locking piece from falling into the flow channel (14); The right side wall of the installation inner cavity (52) is provided with a limiting step (67) located above the extension plate (653) and capable of colliding with the extension plate (653).

7. The AH-class micro-leakage forged hard-sealed ball valve according to claim 6, characterized in that: A recessed opening is provided at the lower end of the right side of the extension plate (653), a recessed area (71) is formed between the recessed opening and the anti-escape block (66), a sub-vent (72) which is always in communication with the recessed area (71) is provided in the right side wall of the mounting seat (511), a main vent (73) which extends into the interior of the sub-valve body (12) is provided on the surface of the sub-valve body (12), an inner hole (74) which connects the main vent (73) and the sub-vent (72) is provided in the sub-valve body (12), and the gas introduced through the main vent (73) can continuously flow into the recessed area (71).

8. The AH-class micro-leakage forged hard-sealed ball valve according to claim 5, characterized in that: A force-bearing column (81) is fixedly provided on the upper end of the locking push plate (64), and two embedded columns (83) are fixedly provided on the upper end of the mounting seat (511), an embedded space is formed between the two embedded columns (83), the force-bearing column (81) is adapted to the embedded space, a force-bearing groove (82) is opened on the upper end of the force-bearing column (81), a secondary spring (84) is provided in the force-bearing groove (82), and the upper end of the secondary spring (84) extends into the embedded space.

Images