Hard sealing ball valve

Abstract

The utility model discloses a hard sealing ball valve, and relates to the technical field of valve structures. The check valve comprises a valve body, an inlet channel and an outlet channel are formed in the valve body; a vertical groove is formed between the inlet channel and the outlet channel; balls are rotationally arranged on the inner walls of the vertical grooves; a first arc-shaped groove is formed in the valve body; a plurality of sliding grooves are symmetrically formed in the two opposite inner walls of the vertical groove and located on the upper and lower sides of the inlet channel and the outlet channel; valve seats are slidably arranged on the inner walls of the sliding grooves. A disc spring is connected between one side of the valve seat and the inner wall of the sliding groove. A second arc-shaped groove in sliding fit with the circumferential side face of the ball is formed in the other side of the valve seat. When the pressure of a medium is increased abnormally, the valve seat can be pushed open by the pressure in the valve seat seal or the pressure outside the valve seat seal, so that fluid can be released by a gap between the valve seat and the ball body, the pressure of the medium is reduced, and loss or accidents caused by the pressure are effectively avoided.

Description

Technical Field

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

[0002] The hard-sealed ball valve has good sealing performance, which can effectively prevent the leakage of the medium. It has good corrosion resistance and can effectively resist the erosion of corrosive media. It has good operating performance and can achieve fast opening and closing. It has a good compact structure and can effectively reduce the space occupied by the pipeline system. It has good wear resistance and can effectively resist the wear of the medium. It has good reliability and can effectively ensure the safe operation of the pipeline system.

[0003] The ends of the valve stem of a hard-sealed ball valve are connected to the valve ball and the handle outside the valve body respectively. The up and down movement of the valve stem is controlled by rotating the handle, thereby controlling the opening and closing of the valve. However, when the ball valve is in the closed state, pressurized fluid still exists inside the valve body. If the medium is abnormally pressurized, it may cause losses or accidents.

[0004] To this end, we provide a hard-sealed ball valve to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a hard-sealed ball valve. When the medium is abnormally pressurized, the pressure exerted on both the inside and outside of the valve seat seal will push the valve seat open, and then a gap between the valve seat and the ball can release the fluid, thereby reducing the pressure of the medium, effectively avoiding losses or accidents caused by this. It solves the problem that in the existing ball valve, when the medium is in the closed state, there is still pressurized fluid inside the valve body, which may cause losses or accidents if the medium is abnormally pressurized.

[0006] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0007] The utility model is a hard-sealed ball valve, comprising a valve body; an inlet channel and an outlet channel are provided inside the valve body; a vertical groove is provided between the inlet channel and the outlet channel; the vertical groove connects the inlet channel and the outlet channel; the inlet channel, the outlet channel and the vertical groove all pass through the valve body; a ball is rotatably provided on the inner wall of the vertical groove; a first arc groove is provided inside the valve body at a position where the vertical groove connects with the inlet channel and the outlet channel; the first arc groove slides in cooperation with the circumferential side of the ball; a number of sliding grooves are symmetrically provided on the two opposite inner walls of the vertical groove, which are located on the upper and lower sides of the inlet channel and the outlet channel respectively; a valve seat is slidably provided on the inner wall of the sliding groove; a disc spring is connected between one side of the valve seat and the inner wall of the sliding groove; a second arc groove slides in cooperation with the circumferential side of the ball on the other side of the valve seat.

[0008] The utility model is further configured as follows: the valve seat surface and the bottom surface are both provided with mounting grooves; the mounting grooves are both provided with O-rings; and the O-rings are respectively fitted with the inner wall of the mounting groove and the inner wall of the sliding groove.

[0009] The utility model is further configured as follows: valve covers are fixed on two opposite sides of the valve body; studs are symmetrically threadedly provided on the side surfaces of the valve body; nuts are threadedly provided on the side surfaces around the studs; the studs pass through the valve cover; the studs connect and fix the valve body and the valve cover; and the valve cover seals the bottom of the vertical groove.

[0010] The utility model is further configured as follows: an annular mounting block is provided on the surface of the valve body; a first annular sealing groove is provided on the annular mounting block and the side surface of the valve cover; a first annular sealing gasket adapted to the inner wall of the first annular sealing groove is fixed symmetrically on the upper and lower sides of the valve body side; a second annular sealing groove is provided on the surface and bottom surface of the valve body; a second annular sealing gasket is provided on the inner wall of the second annular sealing groove; the two second annular sealing gaskets are respectively fitted with the bottom surface of the annular mounting block and the surface of the valve cover.

[0011] The utility model is further configured as follows: a valve stem is slidingly provided on the inner wall of the annular mounting block; an I-shaped rod is fixed to the bottom end of the valve stem; a third annular sealing gasket is provided on the inner wall of the I-shaped rod; the third annular sealing gasket is fitted with the inner wall of the annular mounting block; a clamping plate is fixed to the bottom surface of the I-shaped rod; and a split ring is provided between the clamping plate and the annular mounting block.

[0012] The utility model is further configured as follows: an annular packing pad and an annular packing gland are sequentially arranged between the peripheral side surface of the valve stem and the annular mounting block from bottom to top; and flexible graphite is arranged between the annular packing pad and the annular packing gland.

[0013] The utility model is further configured as follows: an annular positioning block is provided on the surface of the annular packing gland; a retaining ring is provided on the surface of the annular positioning block; a handle is connected to the top end of the valve stem; the surface of the handle and the surface of the annular packing gland are both threadedly engaged with hexagon socket screws; the two hexagon socket screws respectively penetrate the top end of the valve stem and the surface of the annular mounting block; a large washer is provided between the hexagon socket screw and the handle.

[0014] The utility model has the following beneficial effects:

[0015] 1. When the ball valve of the utility model is closed, there is still pressurized fluid inside. When the medium pressure increases abnormally, the fluid needs to be released. The pressure inside and outside the valve seat seal will push the valve seat open, causing the valve seat to slide toward the disc spring. Then, a gap will appear between the valve seat and the ball, and the fluid will flow out of the gap to be released, thereby reducing the pressure of the medium and effectively avoiding losses or accidents caused by it.

[0016] 2. During the sliding process of the valve seat of the present invention, the O-ring in the installation groove is driven to slide, thereby increasing the resistance of the valve seat to sliding, cushioning the sliding of the valve seat and preventing the pressure of the fluid from damaging the valve seat.

[0017] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 This is a structural diagram of a hard-sealed ball valve.

[0020] Figure 2 For the utility model Figure 1 A magnified view of area A.

[0021] Figure 3 For the utility model Figure 1 Magnified view of area B.

[0022] Figure 4 It is a schematic diagram of the working principle of the utility model.

[0023] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0024] 1-valve body, 2-inlet channel, 3-outlet channel, 4-vertical groove, 5-ball, 6-first arc groove, 7-slide groove, 8-valve seat, 9-disc spring, 10-second arc groove, 11-mounting groove, 12-O-ring, 13-valve cover, 14-stud, 15-nut, 16-annular mounting block, 17-first annular sealing groove, 18-first annular sealing gasket, 19-second annular sealing groove, 20-second annular sealing gasket, 21-valve stem, 22-I-rod, 23-third annular sealing gasket, 24-holding plate, 25-split ring, 26-annular packing pad, 27-annular packing gland, 28-flexible graphite, 29-annular positioning block, 30-retaining ring, 31-handle, 32-hexagon socket screw, 33-large washer. DETAILED DESCRIPTION

[0025] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] For specific embodiment 1, please refer to Figure 1-4 The utility model is a hard-sealed ball valve, comprising a valve body 1; an inlet channel 2 and an outlet channel 3 are provided inside the valve body 1; a vertical slot 4 is provided between the inlet channel 2 and the outlet channel 3; the vertical slot 4 connects the inlet channel 2 and the outlet channel 3; the inlet channel 2, the outlet channel 3 and the vertical slot 4 all pass through the valve body 1; a ball 5 is rotatably provided on the inner wall of the vertical slot 4; a first arcuate slot 6 is provided inside the valve body 1 at the position where the vertical slot 4 connects with the inlet channel 2 and the outlet channel 3; the first arcuate slot 6 slides in cooperation with the side surface of the ball 5; a number of slide slots 7 are symmetrically provided on the two opposite inner walls of the vertical slot 4, which are located on the upper and lower sides of the inlet channel 2 and the outlet channel 3; a valve seat 8 is slidably provided on the inner wall of the slide slot 7; a disc spring 9 is connected between one side of the valve seat 8 and the inner wall of the slide slot 7; a second arcuate slot 10 is provided on the other side of the valve seat 8 to slide in cooperation with the side surface of the ball 5.

[0027] Specifically, mounting grooves 11 are provided on the surface and bottom of the valve seat 8 ; O-rings 12 are provided inside the mounting grooves 11 ; the O-rings 12 fit the inner walls of the mounting grooves 11 and the inner walls of the slide groove 7 , respectively.

[0028] Furthermore, valve covers 13 are fixed on two opposite sides of the valve body 1; studs 14 are symmetrically threadedly provided on the side of the valve body 1; nuts 15 are threadedly provided on the side around the studs 14; the studs 14 pass through the valve cover 13; the studs 14 connect and fix the valve body 1 and the valve cover 13; the valve cover 13 seals the bottom of the vertical groove 4.

[0029] The operation process of this embodiment is as follows: the valve cover 13 is connected to the valve body 1 through the studs 14 and the nuts 15 to complete the installation of the valve cover 13 so that the valve cover 13 seals the bottom of the vertical groove 4.

[0030] When the ball valve is closed, pressurized fluid still exists inside. The first arc groove 6 and the second arc groove 10 are both in contact with the side surfaces of the ball 5, and the fluid cannot flow through the inlet channel 2 and the outlet channel 3. When the medium is abnormally pressurized, the fluid needs to be released. The pressure inside and outside the valve seat 8 seal will push the valve seat 8 open, causing the valve seat 8 to slide along the inner wall of the slide groove 7 toward the disc spring 9, and then a gap will exist between the valve seat 8 and the ball 5, and the fluid will flow out of this gap for release, thereby reducing the pressure of the medium and effectively avoiding losses or accidents caused by it.

[0031] During the sliding of the valve seat 8 , the O-ring 12 in the mounting groove 11 is driven to slide, thereby increasing the sliding resistance of the valve seat 8 , cushioning the sliding of the valve seat 8 and preventing the pressure of the fluid from damaging the valve seat 8 .

[0032] For specific embodiment 2, please refer to Figure 1-4 On the basis of the first specific embodiment, an annular mounting block 16 is provided on the surface of the valve body 1; a first annular sealing groove 17 is provided on the side surface of the annular mounting block 16 and the valve cover 13; a first annular sealing gasket 18 is fixed symmetrically on the side surface of the valve body 1 so as to match the inner wall of the first annular sealing groove 17; a second annular sealing groove 19 is provided on the surface and bottom surface of the valve body 1; a second annular sealing gasket 20 is provided on the inner wall of the second annular sealing groove 19; the two second annular sealing gaskets 20 are respectively in contact with the bottom surface of the annular mounting block 16 and the surface of the valve cover 13.

[0033] Specifically, a valve stem 21 is slidably provided on the inner wall of the annular mounting block 16; an I-shaped rod 22 is fixed to the bottom end of the valve stem 21; a third annular sealing gasket 23 is provided on the inner wall of the I-shaped rod 22; the third annular sealing gasket 23 is in contact with the inner wall of the annular mounting block 16; a clamping plate 24 is fixed to the bottom surface of the I-shaped rod 22; a split ring 25 is provided between the clamping plate 24 and the annular mounting block 16.

[0034] Furthermore, an annular packing gasket 26 and an annular packing gland 27 are sequentially arranged from bottom to top between the peripheral side of the valve stem 21 and the annular mounting block 16 ; and flexible graphite 28 is arranged between the annular packing gasket 26 and the annular packing gland 27 .

[0035] Furthermore, an annular positioning block 29 is provided on the surface of the annular packing gland 27; a retaining ring 30 is provided on the surface of the annular positioning block 29; a handle 31 is connected to the top of the valve stem 21; the surface of the handle 31 and the surface of the annular packing gland 27 are both threadedly engaged with hexagon socket screws 32; the two hexagon socket screws 32 respectively pass through the top of the valve stem 21 and the surface of the annular mounting block 16; a large washer 33 is provided between the hexagon socket screw 32 and the handle 31.

[0036] The operating process of this embodiment is: install the annular mounting block 16 and the valve cover 13 on the surface and bottom surface of the valve body 1, so that the first annular sealing gasket 18 is plugged into and matched with the first annular sealing groove 17, and the two second annular sealing gaskets 20 are respectively fitted with the bottom surface of the annular mounting block 16 and the surface of the valve cover 13, thereby improving the sealing between the annular mounting block 16 and the valve cover 13 and the valve body 1.

[0037] Then insert the valve stem 21 from the inner wall of the annular mounting block 16, and then fill the flexible graphite 28 into the annular packing pad 26 of the valve stem 21. Finally, cover the annular packing gland 27 to seal the flexible graphite 28. Then place the annular positioning block 29 and the retaining ring 30 on the surface of the annular packing gland 27 in sequence. Then place the handle 31 on the top of the valve stem 21, and place the large washer 33 on the surface of the handle 31. Finally, use the hexagon socket screw 32 to connect and fix the handle 31 and the valve stem 21.

[0038] When the valve stem 21 slides downward, the I-rod 22 slides downward, driving the third annular sealing gasket 23 thereon to move close to the inner wall of the annular mounting block 16 to increase the sealing performance. When the valve stem 21 slides to the lowest position, the clamping plate 24 presses against the side surface of the ball 5, and the bottom surface of the I-rod 22 fits against the split ring 25. At this time, the ball 5 is limited and fixed. When the valve stem 21 slides upward, the clamping plate 24 separates from the ball 5, and the ball 5 is released from the limit.

[0039] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0040] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments do not describe all details in detail, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the contents of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A hard-sealed ball valve, comprising a valve body (1); characterized in that: An inlet channel (2) and an outlet channel (3) are provided inside the valve body (1); a vertical groove (4) is provided between the inlet channel (2) and the outlet channel (3); the vertical groove (4) connects the inlet channel (2) and the outlet channel (3); the inlet channel (2), the outlet channel (3) and the vertical groove (4) all pass through the valve body (1); A sphere (5) is rotatably provided on the inner wall of the vertical groove (4); a first arcuate groove (6) is provided inside the valve body (1) at a position where the vertical groove (4) is connected to the inlet channel (2) and the outlet channel (3); the first arcuate groove (6) is in sliding engagement with the circumferential side surface of the sphere (5); The two opposite inner walls of the vertical groove (4) are respectively located on the upper and lower sides of the inlet channel (2) and the outlet channel (3) and are symmetrically provided with a plurality of slide grooves (7); the inner walls of the slide grooves (7) are slidably provided with valve seats (8); A disc spring (9) is connected between one side of the valve seat (8) and the inner wall of the slide groove (7); the other side of the valve seat (8) is provided with a second arc groove (10) that is slidably engaged with the side surface of the ball (5).

2. A hard-sealed ball valve according to claim 1, characterized in that: The surface and bottom of the valve seat (8) are both provided with mounting grooves (11); an O-ring (12) is provided inside the mounting groove (11); and the O-ring (12) is respectively fitted with the inner wall of the mounting groove (11) and the inner wall of the slide groove (7).

3. A hard-sealed ball valve according to claim 2, characterized in that: A valve cover (13) is fixed to two opposite sides of the valve body (1); a stud (14) is symmetrically provided on the side of the valve body (1) for rotational thread; a nut (15) is provided on the side of the stud (14) for rotational thread; the stud (14) passes through the valve cover (13); the stud (14) connects and fixes the valve body (1) and the valve cover (13); the valve cover (13) seals the bottom of the vertical groove (4).

4. A hard-sealed ball valve according to claim 3, characterized in that: The valve body (1) is provided with an annular mounting block (16) on its surface; a first annular sealing groove (17) is provided on the circumferential side of the annular mounting block (16) and the valve cover (13); a first annular sealing gasket (18) adapted to the inner wall of the first annular sealing groove (17) is fixed symmetrically on the upper and lower sides of the valve body (1); a second annular sealing groove (19) is provided on the surface and bottom surface of the valve body (1); a second annular sealing gasket (20) is provided on the inner wall of the second annular sealing groove (19); the two second annular sealing gaskets (20) are respectively fitted with the bottom surface of the annular mounting block (16) and the surface of the valve cover (13).

5. A hard-sealed ball valve according to claim 4, characterized in that: A valve stem (21) is slidably provided on the inner wall of the annular mounting block (16); an I-shaped rod (22) is fixed to the bottom end of the valve stem (21); a third annular sealing gasket (23) is provided on the inner wall of the I-shaped rod (22); the third annular sealing gasket (23) is in contact with the inner wall of the annular mounting block (16); a clamping plate (24) is fixed to the bottom surface of the I-shaped rod (22); and a split ring (25) is provided between the clamping plate (24) and the annular mounting block (16).

6. A hard-sealed ball valve according to claim 5, characterized in that: An annular packing pad (26) and an annular packing gland (27) are sequentially arranged between the peripheral side surface of the valve stem (21) and the annular mounting block (16) from bottom to top; and flexible graphite (28) is arranged between the annular packing pad (26) and the annular packing gland (27).

7. A hard-sealed ball valve according to claim 6, characterized in that: The surface of the annular packing gland (27) is provided with an annular positioning block (29); the surface of the annular positioning block (29) is provided with a retaining ring (30); the top end of the valve stem (21) is connected to a handle (31); the surface of the handle (31) and the surface of the annular packing gland (27) are both threadedly engaged with hexagon socket screws (32); the two hexagon socket screws (32) respectively penetrate the top end of the valve stem (21) and the surface of the annular mounting block (16); a large washer (33) is provided between the hexagon socket screw (32) and the handle (31).

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