CN215293674U

CN215293674U - Eccentric half ball valve adopting hard seal

Info

Publication number: CN215293674U
Application number: CN202120845595.6U
Authority: CN
Inventors: 李勇军; 鲁喜民
Original assignee: Jingmen Hengli Flow Control Co ltd
Current assignee: Jingmen Hengli Flow Control Co ltd
Priority date: 2021-04-23
Filing date: 2021-04-23
Publication date: 2021-12-24
Anticipated expiration: 2031-04-23

Abstract

The utility model discloses an adopt sealed eccentric half ball valve firmly belongs to valve technical field. The valve comprises a valve body, a flange, a ball body, a spherical crown, a sealing ring and a valve seat, wherein the sealing ring and the valve seat are both circular rings; the sealing ring is a stainless steel ring, the valve seat is a copper ring, the joint of the ball body and the spherical crown is an annular step ascending from bottom to top, the sealing ring is sleeved on the annular step, the shape of the inner side of the sealing ring is matched with that of the annular step, the spherical crown is coaxially provided with a pressing plate, the pressing plate is a circular ring and is pressed against the upper side of the sealing ring to fix the sealing ring on the ball body; the flange is coaxially provided with a slotted hole, a gland capable of sealing the slotted hole is arranged in the slotted hole, the gland is a circular ring matched with the valve seat, the upper end of the valve seat is outwards coaxially provided with a convex ring, and the convex ring is locked and fixed between the bottom of the slotted hole and the lower side of the gland; a lower sealing ring is arranged between the outer side of the valve seat and the valve body, and an upper sealing ring is arranged between the upper side of the valve seat and the lower side of the gland.

Description

Eccentric half ball valve adopting hard seal

Technical Field

The utility model belongs to the technical field of the valve, in particular to adopt sealed eccentric half-ball valve firmly.

Background

The ball valve, the flange gate valve, the flange butterfly valve and the oxygen reducing valve belong to the same type of valve, and the closing part of the valve is a sphere which is opened and closed by rotating around the central line of the valve body. The eccentric half ball valve has small flow resistance, good sealing performance and convenient and flexible operation, and is widely applied to various industries.

The patent with the application number of CN 201520490293.6 discloses an eccentric hemisphere valve of full latus rectum of upper assembling formula, including the valve body, the upper end of valve body is provided with the valve gap, the lower extreme is provided with the back lid, is provided with the spheroid between valve gap and the back lid, is provided with the spherical crown on the spheroid, is provided with the disk seat on the spherical crown, is provided with the sealing washer between disk seat and the valve body, is provided with the lower valve rod on the valve gap, the back covers, last valve rod and spheroid pass through the pin fixed together, go up and be provided with the double safety disc of packing between valve rod and the valve gap, be provided with the graphite packing between double safety disc of packing and last valve rod, be provided with gland in the upper end of graphite packing, be connected through bolt and nut between gland and the valve gap.

The existing eccentric half-ball valve usually adopts soft seal, but part of customers may require to adopt hard seal, usually need to adjust the structure of valve body and spheroid, especially need to adjust the structure of casting mould, and the cost is higher, needs to spend more time.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems, the embodiment of the utility model provides an eccentric half ball valve adopting hard sealing, which is a hard sealing structure, the valve body only needs to be provided with a slotted hole on the flange, only needs to be provided with an annular ladder on the spherical crown, and the casting mold can adopt the same casting mold with the soft sealing, thereby reducing the cost; the processing of the slotted hole and the annular step is very simple and can be realized by a conventional lathe, a milling machine or a processing center and the like. The technical scheme is as follows:

the embodiment of the utility model provides an eccentric half-ball valve adopting hard sealing, which comprises a valve body 1 which is vertically arranged, a flange 2 at the top of the valve body 1, a ball 3 in the valve body 1, a ball crown 4 at the upper end of the ball 3, a sealing ring 5 on the ball crown 4 and a valve seat 6 which is arranged at the upper part in the valve body 1 and is matched with the sealing ring 5, wherein the sealing ring 5 and the valve seat 6 are both circular rings; the sealing ring 5 is a stainless steel ring, the valve seat 6 is a copper ring, the joint of the ball body 3 and the spherical crown 4 is an annular step 7 ascending from bottom to top, the sealing ring 5 is sleeved on the annular step 7, the shape of the inner side of the sealing ring 5 is matched with that of the annular step 7, a pressing plate 8 is coaxially arranged on the spherical crown 4, the pressing plate 8 is a circular ring and is pressed against the upper side of the sealing ring 5 to fix the sealing ring 5 on the ball body 3; the flange 2 is coaxially provided with a slotted hole 9, a gland 10 capable of sealing the slotted hole 9 is arranged in the slotted hole 9, the gland 10 is a circular ring matched with the valve seat 6, the upper end of the valve seat 6 is outwards coaxially provided with a convex ring 11, and the convex ring 11 is locked and fixed between the bottom of the slotted hole 9 and the lower side of the gland 10; a lower sealing ring is arranged between the outer side of the valve seat 6 and the valve body 1, and an upper sealing ring is arranged between the upper side of the valve seat 6 and the lower side of the gland 10.

Wherein, the embodiment of the utility model provides an in the inner wall of gland 10 and the inner wall parallel and level of disk seat 6, its upside and flange 2's up end parallel and level or than flange 2's up end low.

Wherein, the embodiment of the utility model provides an outer wall of disk seat 6 and flange 2's inner wall clearance fit.

Further, the gland 10 in the embodiment of the present invention is fixed in the slot 9 by a plurality of upper bolts 12, the plurality of upper bolts 12 are uniformly distributed around the protruding ring 11, and the upper bolts 12 are vertically arranged and the lower ends thereof are fixed on the slot 9.

Wherein, the embodiment of the utility model provides an in the outside of sealing washer 5 be the arcwall face, disk seat 6 is the arcwall face with sealing washer 5 contact department.

Further, a lower sealing groove 13 for embedding a lower sealing ring is coaxially arranged at the outer side of the valve seat 6 in the embodiment of the present invention, and the lower sealing ring is embedded in the lower sealing groove 13; an upper sealing groove 14 for embedding an upper sealing ring is arranged on the lower side of the gland 10, and the upper sealing ring is embedded into the upper sealing groove 14.

Further, the utility model provides an in the middle part of spherical crown 4 is coaxial to be equipped with

circular arch

15, 8 covers of clamp plate are established on circular arch 15 and its inner wall and circular arch 15's outer wall clearance fit, clamp plate 8 fixes on spherical crown 4 through many lower bolts 16, and many lower bolts 16 are around circular arch 15 evenly distributed and equal vertical setting, the upside of clamp plate 8 and circular arch 15's upside parallel and level.

Specifically, the gland 10 and the pressing plate 8 in the embodiment of the present invention are stainless steel rings.

Specifically, the annular step 7 in the embodiment of the present invention has a third-order step.

The embodiment of the utility model provides a beneficial effect that technical scheme brought is: the embodiment of the utility model provides an adopt sealed eccentric half-ball valve firmly, for hard seal structure, the valve body only need set up the slotted hole on the flange, only need process annular ladder (as in this embodiment, form the four-step structure with the circular bulge) on the spherical crown, its casting mould can adopt the same casting mould with soft seal, namely adjust from soft seal to hard seal and need not develop new mould, reduce cost; the processing of the slotted hole and the annular step is very simple and can be realized by a conventional lathe, a milling machine or a processing center and the like.

Drawings

Fig. 1 is a schematic structural diagram of an eccentric half-ball valve adopting hard sealing according to an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1;

FIG. 3 is a schematic diagram of a sphere;

fig. 4 is a cross-sectional view of the seal ring.

In the figure: 1 valve body, 2 flanges, 3 spheres, 4 spherical crowns, 5 sealing rings, 6 valve seats, 7 annular steps, 8 pressing plates, 9 slotted holes, 10 pressing covers, 11 convex rings, 12 upper bolts, 13 lower sealing grooves, 14 upper sealing grooves, 15 circular bulges and 16 lower bolts.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1-4, the embodiment of the utility model provides an adopt sealed eccentric hemisphere valve firmly, including flange 2 (business turn over material mouth) at valve body 1, the 1 top of valve body, spheroid 3 in the valve body 1, the spherical crown 4 (coaxial setting) of the 3 upper ends of spheroid, sealing washer 5 (coaxial setting) on the spherical crown 4 and the valve body 1 in upper portion and with sealing washer 5 complex disk seat 6 (with the coaxial setting of flange 2) etc. sealing washer 5 and disk seat 6 are the ring. The structure is basically the same as that of the existing eccentric half ball valve, and the difference is that: in this embodiment, the seal ring 5 is a stainless steel ring, and the valve seat 6 is a copper ring. The joint of the ball body 3 and the spherical crown 4 is an annular step 7 (the processing is simple, the processing precision is high, the strength of the ball body and the sealing ring can be ensured) which is from bottom to top, the sealing ring 5 is sleeved on the annular step 7, and the shape of the inner side of the sealing ring (also in an annular step structure) is matched with the annular step 7. The spherical crown 4 is coaxially provided with a pressing plate 8, the pressing plate 8 is a circular ring (the outer diameter can ensure that the sealing ring 5 is tightly pressed), and the pressing plate 8 is pressed against the upper side (horizontal) of the sealing ring 5 to fix the sealing ring 5 on the sphere 3. The flange 2 is coaxially provided with a slotted hole 9 (the diameter is larger than that of the central hole of the flange 2), a gland 10 capable of sealing the slotted hole 9 is arranged in the slotted hole 9, the gland 10 is a circular ring matched with the valve seat 6 (the inner diameter is matched), the upper end of the valve seat 6 is outwards and coaxially provided with a convex ring 11 (the protruding length is preferably more than 5 mm), and the convex ring 11 is locked and fixed between the bottom of the slotted hole 9 and the lower side (inner side) of the gland 10. A lower sealing ring (at least one, a plurality of lower sealing rings are arranged side by side up and down, two in this embodiment) is arranged between the outer side of the valve seat 6 (below the convex ring 11) and the valve body 1, and an upper sealing ring (one in this embodiment) is arranged between the upper side of the valve seat 6 and the lower side of the gland 10.

Referring to fig. 1-2, the inner wall of the gland 10 in the embodiment of the present invention is flush with the inner wall of the valve seat 6, and the upper side thereof is flush with the upper end surface of the flange 2 or lower (slightly lower) than the upper end surface of the flange 2.

Further, referring to fig. 1-2, the gland 10 in the embodiment of the present invention is fixed in the slot 9 by a plurality of upper bolts 12, the plurality of upper bolts 12 are uniformly distributed around the protruding ring 11 (located on the same circle concentric with the slot 9, located outside the protruding ring 11), the upper bolts 12 are vertically arranged and the lower ends thereof are fixed on the slot 9 (correspondingly provided with threaded holes thereon). The upper side of the gland 10 is correspondingly provided with a counter bore for the upper bolt 12 to pass through.

Wherein, referring to fig. 1-2 and 4, the outer side of the sealing ring 5 in the embodiment of the present invention is an arc surface, and the contact position of the valve seat 6 and the sealing ring 5 is an arc surface.

Further, referring to fig. 1-2, a lower sealing groove 13 (a ring groove with a rectangular cross section) for embedding the lower sealing ring is coaxially disposed outside the valve seat 6 in the embodiment of the present invention, and the lower sealing ring is embedded in the lower sealing groove 13. An upper sealing groove 14 (a ring groove with a rectangular cross section) into which the upper sealing ring is inserted is formed at the lower side of the gland 10, and the upper sealing ring is inserted into the upper sealing groove 14.

Further, referring to fig. 1-3, the embodiment of the present invention provides an embodiment of a spherical cap 4, wherein the central portion of the spherical cap is coaxially provided with a circular protrusion 15 (forming a four-step ring structure with an annular step 7), a pressing plate 8 is sleeved on the circular protrusion 15 and has an inner wall thereof in clearance fit with an outer wall of the circular protrusion 15, the pressing plate 8 is fixed on the spherical cap 4 through a plurality of lower bolts 16, the plurality of lower bolts 16 are uniformly distributed around the circular protrusion 15 (located on the same circle concentric with the circular protrusion 15 and located outside the circular protrusion 15) and vertically arranged, the upper side of the pressing plate 8 is flush with the upper side of the circular protrusion 15, and a counter bore for the lower bolt 16 to pass is provided thereon.

Specifically, referring to fig. 1-3, the annular step 7 in the embodiment of the present invention has a third step.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. The eccentric half-ball valve adopting hard sealing comprises a valve body (1) which is vertically arranged, a flange (2) at the top of the valve body (1), a ball (3) in the valve body (1), a ball crown (4) at the upper end of the ball (3), a sealing ring (5) on the ball crown (4) and a valve seat (6) which is arranged at the upper part in the valve body (1) and matched with the sealing ring (5), wherein the sealing ring (5) and the valve seat (6) are both circular rings; the sealing ring is characterized in that the sealing ring (5) is a stainless steel ring, the valve seat (6) is a copper ring, the joint of the ball body (3) and the spherical crown (4) is an annular step (7) which is stepped from bottom to top, the sealing ring (5) is sleeved on the annular step (7), the shape of the inner side of the sealing ring is matched with that of the annular step (7), a pressing plate (8) is coaxially arranged on the spherical crown (4), and the pressing plate (8) is a circular ring and is pressed against the upper side of the sealing ring (5) to fix the sealing ring (5) on the ball body (3); a slotted hole (9) is coaxially formed in the flange (2), a gland (10) capable of sealing the slotted hole (9) is arranged in the slotted hole (9), the gland (10) is a circular ring matched with the valve seat (6), a convex ring (11) is outwards and coaxially arranged at the upper end of the valve seat (6), and the convex ring (11) is locked and fixed between the bottom of the slotted hole (9) and the lower side of the gland (10); a lower sealing ring is arranged between the outer side of the valve seat (6) and the valve body (1), and an upper sealing ring is arranged between the upper side of the valve seat (6) and the lower side of the gland (10).

2. The eccentric hemisphere valve using the hard seal according to claim 1, wherein the inner wall of the gland (10) is flush with the inner wall of the valve seat (6), and the upper side thereof is flush with the upper end surface of the flange (2) or lower than the upper end surface of the flange (2).

3. The eccentric hemisphere valve with the hard seal according to claim 1, wherein the outer wall of the valve seat (6) is in clearance fit with the inner wall of the flange (2).

4. The eccentric hemisphere valve with the hard seal according to claim 1, wherein the gland (10) is fixed in the groove hole (9) through a plurality of upper bolts (12), the plurality of upper bolts (12) are evenly distributed around the convex ring (11), the upper bolts (12) are vertically arranged, and the lower ends of the upper bolts are fixed on the groove hole (9).

5. The eccentric hemisphere valve adopting the hard seal according to claim 1, wherein the outer side of the seal ring (5) is an arc-shaped surface, and the contact part of the valve seat (6) and the seal ring (5) is an arc-shaped surface.

6. The eccentric hemisphere valve adopting the hard seal according to claim 1, wherein a lower seal groove (13) in which a lower seal ring is embedded is coaxially arranged at the outer side of the valve seat (6), and the lower seal ring is embedded in the lower seal groove (13); the lower side of the gland (10) is provided with an upper sealing groove (14) for embedding the upper sealing ring, and the upper sealing ring is embedded into the upper sealing groove (14).

7. The eccentric hemisphere valve adopting hard sealing as set forth in claim 1, wherein a circular protrusion (15) is coaxially disposed in the middle of the spherical crown (4), the pressing plate (8) is sleeved on the circular protrusion (15) and the inner wall of the pressing plate is in clearance fit with the outer wall of the circular protrusion (15), the pressing plate (8) is fixed on the spherical crown (4) through a plurality of lower bolts (16), the lower bolts (16) are uniformly distributed around the circular protrusion (15) and are vertically arranged, and the upper side of the pressing plate (8) is flush with the upper side of the circular protrusion (15).

8. The eccentric hemisphere valve with the hard seal according to claim 1, wherein the gland (10) and the pressure plate (8) are stainless steel rings.

9. The eccentric half-ball valve adopting hard sealing as claimed in claim 1, wherein the annular step (7) has three steps.