Top-mounted high-pressure floating ball valve

Abstract

The utility model belongs to the technical field of valves, and relates to a top-mounted high-pressure floating ball valve used in the technical fields of petroleum, chemical engineering, metallurgy, lithium batteries, water treatment and the like, which comprises a middle valve body, one end of the middle valve body is hermetically connected with a left valve body, and the other end of the middle valve body is hermetically connected with a right valve body. The middle valve body and the left valve body as well as the middle valve body and the right valve body are respectively sealed through a group of triple sealing structures; a left valve seat assembly is installed in a seat cavity of the left valve body, a right valve seat assembly is installed in a seat cavity of the right valve body, and the valve ball is arranged between the left valve seat assembly and the right valve seat assembly. An upper cover is installed in a middle cavity of the middle valve body, a valve shaft is installed in the middle cavity of the middle valve body, and an upper shaft body of the valve shaft penetrates through an inner hole of the upper cover and then extends upwards. The floating ball valve can effectively reduce the risk that the joint of the valve shaft and the valve ball is damaged under the high-pressure working condition, and it is guaranteed that the device operates safely, stably and efficiently; meanwhile, the inner leakage risk and the outer leakage risk of the valve body can be reduced, and the service life of the ball valve is effectively prolonged.

Description

TECHNICAL FIELD

[0001] The utility model belongs to valve technical field relates to a kind of upper-mounted high-pressure floating ball valves for petroleum, chemical industry, metallurgy, lithium battery, water treatment and other technical fields. BACKGROUND

[0002] In petroleum, chemical industry, metallurgy, lithium battery, water treatment and other devices, flammable, explosive, volatile, toxic, harmful and other media are prone to internal leakage and external leakage; The internal leakage of such media leads to equipment downtime maintenance, causing economic losses; The external leakage of such media causes serious losses to the environment, personnel and equipment. Especially in high-altitude, high-pressure, high-temperature and other dangerous positions where such valves are installed, maintenance personnel cannot closely inspect whether they are working properly. Once the valve fails, the device is forced to stop running to repair or replace the valve, causing unnecessary economic losses and time waste. SUMMARY

[0003] The utility model provides an upper-mounted high-pressure floating ball valve to address the above issues. The floating ball valve can effectively reduce the risk of damage to the valve shaft and valve ball connection under high-pressure working conditions, ensuring safe, stable and efficient operation of the device. At the same time, the utility model can also reduce the risk of internal leakage and external leakage of the valve body, effectively extending the service life of the ball valve.

[0004] According to the technical scheme of the utility model: an upper-mounted high-pressure floating ball valve, characterized by: comprising a middle valve body, the middle valve body is sealingly connected to a left valve body at one end and a right valve body at the other end, and the middle valve body, left valve body and right valve body are sealed by a set of triple sealing structure respectively;

[0005] A left valve seat assembly is installed in the seat cavity of the left valve body, and a right valve seat assembly is installed in the seat cavity of the right valve body. The valve ball is arranged between the left valve seat assembly and the right valve seat assembly.

[0006] An upper cover is installed in the middle cavity of the middle valve body, and a valve shaft is installed in the middle cavity of the middle valve body. The upper part of the valve shaft protrudes upward after penetrating the inner hole of the upper cover. A sealing assembly is installed in the packing gland of the upper cover and is tightly fixed by the packing gland and packing plate. The tenon groove of the valve shaft cooperates with the flat square of the valve ball.

[0007] A bushing is installed in the shaft hole of the upper cover. A plane bearing is also installed between the valve shaft and the middle valve body.

[0008] As a further improvement of the utility model, the first winding gasket is arranged in the groove on the top surface of the middle valve body and is pressed by the protruding part on the bottom surface of the flange part of the upper cover, the first metal annular gasket is arranged at the root of the flange part of the upper cover and the upper end of the inner hole of the middle valve body, and the first graphite sealing ring is arranged in the stepped hole of the middle valve body, and the upper cover penetrates the first graphite sealing ring.

[0009] As a further improvement of the utility model, the sealing assembly comprises a balance sealing ring, a packing gasket, a packing group and a packing spacer ring, the balance sealing ring is arranged in the inner hole of the upper cover and is supported by the annular radial protrusion of the inner hole of the upper cover, the packing gasket is arranged on the top surface of the balance sealing ring, two groups of packing groups are arranged above the balance sealing ring, and the two groups of packing groups are spaced by the packing spacer ring.

[0010] As a further improvement of the utility model, the triple sealing structure comprises a second metal annular gasket, a second winding gasket and a second graphite sealing ring, the second winding gasket is arranged in the groove on the side of the middle valve body and is pressed by the annular protrusion on the flange surface of the left valve body or the right valve body, the second metal annular gasket is arranged on the joint surface between the middle valve body and the corresponding left valve body or right valve body, the second graphite sealing ring is arranged in the inner hole of the middle valve body, and the corresponding left valve body or right valve body penetrates the corresponding second graphite sealing ring.

[0011] As a further improvement of the utility model, the left valve seat assembly comprises a left valve seat, a third check ring and a third O-shaped ring arranged in the annular groove on the circumferential surface of the left valve seat, and the tail end of the left valve seat is supported by a support ring, and a disc spring is arranged between the rear end surface of the support ring and the seat cavity of the left valve body.

[0012] The right valve seat assembly comprises a right valve seat, a third graphite sealing ring is arranged between the right valve seat and the right valve body, and a sealing surface is further arranged at the joint of the right valve body and the right valve seat.

[0013] As a further improvement of the utility model, the left valve body, the right valve body and the middle valve body are fastened and connected by the second full thread stud and the second hexagonal nut respectively.

[0014] As a further improvement of the utility model, the upper cover and the middle valve body are fastened and connected by the hexagonal head bolt, and the packing pressing plate is fastened and connected with the upper cover by the first full thread stud, the first hexagonal nut and the disc spring group, so as to realize the pressing and fixing of the packing gland.

[0015] As a further improvement of the utility model, the key is arranged in the key groove of the valve shaft.

[0016] The utility model discloses a valve ball and valve shaft's connecting mode adopt mortise and tenon structure, and mortise and groove design is on the valve shaft, solved this kind of small caliber high pressure valve valve shaft and valve ball connecting place because of the space is limited and the problem of poor intensity, greatly reduced the valve shaft and valve ball connecting place in high pressure working condition is destroyed the risk, guarantee device safety, stable, efficient operation.

[0017] The utility model discloses a right valve body and right valve seat fit place design sealed surface, and the second graphite seal ring constitutes double seal, reduces the inner leakage risk of ball valve under the gas or small molecule medium working condition.

[0018] The utility model discloses a middle valve body and left valve body, right valve body between adopt second metal ring -shaped pad + second winding gasket + second graphite seal ring and constitute triple seal, reduce the outer leakage risk of ball valve under the gas or small molecule medium working condition, prolong valve service life simultaneously. DRAWINGS

[0019] Figure 1 It is valve door structure schematic drawing of the utility model.

[0020] Figure 2 It is the partial enlarged view of valve shaft and valve ball connecting structure of the utility model.

[0021] Figure 3 It is the partial enlarged view of right valve body and right valve seat double seal structure of the utility model.

[0022] Figure 4 It is the partial enlarged view of middle valve body and left valve body, right valve body between triple seal structure of the utility model. CONCRETE IMPLEMENTING METHOD

[0023] The concrete implementing method of the utility model will be further explained below in combination with the drawings.

[0024] In order to make the person skilled in the art better understand the utility model scheme, the technical scheme in the embodiment of the utility model will be described clearly and completely below in combination with the drawings in the embodiment of the utility model, and the described embodiment is only a part of the embodiment of the utility model, not all the embodiment. Based on the embodiment in the utility model, all other embodiments obtained by the person skilled in the art without making creative labor should belong to the scope of protection of the utility model.

[0025] Figures 1-4The utility model relates to a kind of high-pressure floating ball valves, including valve ball 1, left valve body 2, valve shaft 3, middle valve body 4, plane bearing 5, bushing 6, balance sealing ring 7, packing 8, packing group 9, packing isolation ring 10, upper cover 11, packing gland 12, packing plate 13, flat key 14, first full thread stud 15, first hexagonal nut 16, disc spring group 17, first check ring 18, first O-ring 19, second check ring 20, second O-ring 21, hexagonal head bolt 22, first winding gasket 23, first metal ring pad 24, first graphite sealing ring 25, right valve body 26, second full thread stud 27, second hexagonal nut 28, second metal ring pad 29, second winding gasket 30, second graphite sealing ring 31, third graphite sealing ring 32, right valve seat 33, left valve seat 34, third check ring 35, third O-ring 36, fourth graphite sealing ring 37, support ring 38, disc spring 39 and the like.

[0026] As Figures 1-4 The utility model relates to a kind of high-pressure floating ball valves, including middle valve body 4, the middle valve body 4 one end sealing connection left valve body 2, the other end sealing connection right valve body 26, the middle valve body 4 and left valve body 2 and right valve body 26 between respectively through a group of triple sealing structure realizes sealing.

[0027] Left valve seat assembly is installed in the seat cavity of left valve body 2, right valve seat assembly is installed in the seat cavity of right valve body 26, and valve ball 1 is arranged between the left valve seat assembly and the right valve seat assembly.

[0028] Upper cover 11 is installed in the middle cavity of middle valve body 4, valve shaft 3 is installed in the middle cavity of middle valve body 4, the upper part of valve shaft 3 is stretched out upward after penetrating the inner hole of upper cover 11, sealing assembly is installed in the packing box of upper cover 11, and is fixed by packing gland 12 and packing plate 13, and the mortise of valve shaft 3 is matched with the flat square of valve ball 1. Mortise is designed on valve shaft 3, solves the problem that the connection of valve shaft 3 and valve ball 1 of such small-diameter high-pressure valve is poor due to limited space, greatly reduces the risk of the connection of valve shaft 3 and valve ball 1 being destroyed under high pressure, and guarantees the safe, stable and efficient operation of the device. First check ring 18 and first O-ring 19 are sequentially installed in the shaft hole groove of packing gland 12, second check ring 20 and second O-ring 21 are installed in the outer circular groove of packing gland 12, wherein the shaft hole groove is arranged on the inner surface of packing gland 12, and the outer circular groove is arranged on the circumferential surface of the lower end of packing gland 12, and the arc part of the bottom surface of packing plate 13 is tightly pressed on the arc part of the upper end of packing gland 12.

[0029] Bushing 6 is installed in the shaft hole of upper cover 11, and plane bearing 5 is further installed between valve shaft 3 and middle valve body 4.

[0030] The first winding gasket 23 is arranged in the groove on the top surface of the middle valve body 4 and is compressed by the protrusion on the bottom surface of the flange of the upper cover 11. The first metal annular gasket 24 is arranged at the root of the flange of the upper cover 11 and the upper end of the inner hole of the middle valve body 4. The first graphite sealing ring 25 is arranged in the stepped hole of the middle valve body 4, and the upper cover 11 penetrates the first graphite sealing ring 25.

[0031] The sealing assembly comprises a balance sealing ring 7, a packing gasket 8, a packing group 9, and a packing spacer ring 10. The balance sealing ring 7 is arranged in the inner hole of the upper cover 11 and is supported by the annular radial protrusion of the inner hole of the upper cover 11. The packing gasket 8 is arranged on the top surface of the balance sealing ring 7. Two groups of packing groups 9 are arranged above the balance sealing ring 7 and are spaced apart by the packing spacer ring 10.

[0032] The triple sealing structure comprises a second metal annular gasket 29 and a second winding gasket 30 and a second graphite sealing ring 31. The second winding gasket 30 is arranged in the groove on the side of the middle valve body 4 and is compressed by the annular protrusion on the flange surface of the left valve body 2 or the right valve body 26. The second metal annular gasket 29 is arranged on the joint surface of the middle valve body 4 and the corresponding left valve body 2 or right valve body 26. The second graphite sealing ring 31 is arranged in the inner hole of the middle valve body 4, and the corresponding left valve body 2 or right valve body 26 penetrates the corresponding second graphite sealing ring 31. The triple sealing structure reduces the risk of external leakage of the ball valve in the gas or small molecule medium working condition, and prolongs the service life of the valve.

[0033] The left valve seat assembly comprises a left valve seat 34, a third retainer ring 35 and a third O-ring 36 arranged in the annular groove on the circumferential surface of the left valve seat 34, and a support ring 38 supporting the tail end of the left valve seat 34. A disc spring 39 is arranged between the rear end surface of the support ring 38 and the seat cavity of the left valve body 2.

[0034] The right valve seat assembly comprises a right valve seat 33. The third graphite sealing ring 32 is arranged between the right valve seat 33 and the right valve body 26. The fitting part of the right valve body 26 and the right valve seat 33 is also provided with a sealing surface. The sealing surface and the third graphite sealing ring 32 constitute a double sealing structure, which reduces the risk of internal leakage of the ball valve in the gas or small molecule medium working condition. The valve ball 1 is placed between the left valve seat 34 and the right valve seat 33.

[0035] The left valve body 2, the right valve body 26 and the middle valve body 4 are respectively connected by the second full-thread stud 27 and the second hexagonal nut 28.

[0036] The upper cover 11 and the middle valve body 4 are connected by the hexagonal head bolt 22. The packing pressing plate 13 is connected with the upper cover 11 by the first full-thread stud 15, the first hexagonal nut 16 and the disc spring group 17, so as to realize the compression and fixation of the packing gland 12.

[0037] A flat key 14 is arranged in the keyway of the valve shaft 3 to connect an external actuator.

[0038] Finally, it should be noted that the above detailed description is merely intended to illustrate the technical solutions of the present application and not to limit the present application. Although the present application has been described in detail with reference to the examples, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present application, and all of them should be covered in the scope of the claims of the present application.

Claims

1. A top-mounted high pressure floating ball valve characterized by: The middle valve body (4) is sealedly connected with the left valve body (2) at one end and sealedly connected with the right valve body (26) at the other end, and the middle valve body (4) is sealedly connected with the left valve body (2) and the right valve body (26) through a set of triple sealing structure respectively; The left valve seat assembly is installed in the seat cavity of the left valve body (2), the right valve seat assembly is installed in the seat cavity of the right valve body (26), and the valve ball (1) is arranged between the left valve seat assembly and the right valve seat assembly; The upper cover (11) is installed in the middle cavity of the middle valve body (4), the valve shaft (3) is installed in the middle cavity of the middle valve body (4), the upper part of the valve shaft (3) is arranged to extend upward after penetrating the inner hole of the upper cover (11), the sealing assembly is installed in the packing box of the upper cover (11) and is tightly fixed by the packing gland (12) and the packing plate (13), and the tenon groove of the valve shaft (3) is matched with the flat square of the valve ball (1); The bushing (6) is installed in the shaft hole of the upper cover (11), and the plane bearing (5) is further installed between the valve shaft (3) and the middle valve body (4).

2. The top-mounted high-pressure floating ball valve of claim 1, wherein: The first winding gasket (23), the first metal ring gasket (24) and the first graphite sealing ring (25) are arranged between the middle valve body (4) and the upper cover (11), wherein the first winding gasket (23) is arranged in the groove on the top surface of the middle valve body (4) and is tightly pressed by the convex part on the bottom surface of the flange part of the upper cover (11), the first metal ring gasket (24) is arranged at the root of the flange part of the upper cover (11) and the upper end of the inner hole of the middle valve body (4), and the first graphite sealing ring (25) is arranged in the stepped hole of the middle valve body (4), and the upper cover (11) penetrates the first graphite sealing ring (25).

3. The top-mounted high-pressure floating ball valve of claim 1, wherein: The sealing assembly comprises the balance sealing ring (7), the packing gasket (8), the packing group (9) and the packing spacer ring (10), the balance sealing ring (7) is arranged in the inner hole of the upper cover (11) and is supported by the annular radial protrusion of the inner hole of the upper cover (11), the packing gasket (8) is arranged on the top surface of the balance sealing ring (7), two groups of packing groups (9) are arranged above the balance sealing ring (7), and the two groups of packing groups (9) are spaced by the packing spacer ring (10).

4. The top-mounted high-pressure floating ball valve of claim 1, wherein: The second metal ring gasket (29), the second winding gasket (30) and the second graphite sealing ring (31) constitute the triple sealing structure, the second winding gasket (30) is arranged in the groove on the side of the middle valve body (4) and is tightly pressed by the annular protrusion on the flange surface of the left valve body (2) or the right valve body (26), the second metal ring gasket (29) is arranged on the joint surface of the middle valve body (4) and the corresponding left valve body (2) or right valve body (26), and the second graphite sealing ring (31) is arranged in the inner hole of the middle valve body (4), and the corresponding left valve body (2) or right valve body (26) penetrates the corresponding second graphite sealing ring (31) respectively.

5. The top-mounted high-pressure floating ball valve of claim 1, wherein: The left valve seat assembly comprises the left valve seat (34), the third check ring (35) and the third O-shaped ring (36) in the ring groove on the circumferential surface of the left valve seat (34), the tail end of the left valve seat (34) is supported by the support ring (38), and the disc spring (39) is arranged between the rear end surface of the support ring (38) and the seat cavity of the left valve body (2). The right valve seat assembly comprises a right valve seat (33), a third graphite sealing ring (32) is arranged between the right valve seat (33) and a right valve body (26), and a sealing surface is further arranged at the abutting position of the right valve body (26) and the right valve seat (33).

6. The top-mounted high-pressure floating ball valve of claim 1, wherein: The left valve body (2), the right valve body (26) and the middle valve body (4) are fastened and connected through a second full-thread stud (27) and a second hexagonal nut (28) respectively.

7. The top-mounted high-pressure floating ball valve of claim 1, wherein: The upper cover (11) and the middle valve body (4) are fastened and connected through a hexagonal head bolt (22), the packing pressing plate (13) is fastened and connected with the upper cover (11) through a first full-thread stud (15), a first hexagonal nut (16) and a disc spring set (17), so as to realize the pressing and fixing of the packing gland (12).

8. The top-mounted high-pressure floating ball valve of claim 1, wherein: A flat key (14) is arranged in the key groove of the valve shaft (3).

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