CN215334783U

CN215334783U - Split type corrugated pipe track ball valve

Info

Publication number: CN215334783U
Application number: CN202121270623.2U
Authority: CN
Inventors: 潘建新
Original assignee: Shanghai Hongshen Special Valve Manufacturing Co ltd
Current assignee: Shanghai Hongshen Special Valve Manufacturing Co ltd
Priority date: 2021-06-08
Filing date: 2021-06-08
Publication date: 2021-12-28
Anticipated expiration: 2031-06-08

Abstract

The utility model relates to a split type corrugated pipe track ball valve which comprises a ball body, a valve cover, a valve seat and a valve rod, wherein the valve rod comprises an upper valve rod and a lower valve rod; a valve rod spiral groove is formed in the lower valve rod, and a positioning pin matched with the valve rod spiral groove is arranged on the valve cover; the upper end of the upper valve rod is provided with an actuating mechanism, and the actuating mechanism can press or stretch the upper valve rod along the axial direction, so that the lower valve rod can spirally descend or ascend under the matching of the positioning pin and the valve rod spiral groove, and the ball body is driven to open and close relative to the valve seat. Compared with the prior art, the utility model adopts the split valve rod, and the lower valve rod is matched with the track groove, so that the lower valve rod is separated from the corrugated pipe fixing section in the upper valve rod, the rotation of the corrugated pipe is avoided when the track groove of the lower valve rod rotates, and the mechanical structure of the corrugated pipe is not influenced.

Description

Split type corrugated pipe track ball valve

Technical Field

The utility model relates to a ball valve structure, in particular to a split type corrugated pipe track ball valve.

Background

The track ball valve is a ball valve with a special structure, and has no friction in the opening and closing process under the severe working conditions of high or low temperature and can still ensure the reliability of sealing, so the track ball valve is more and more widely applied to the field of chemical industry, particularly occasions needing quick switching and high and low temperature alternation.

CN209213065U discloses an orbital ball valve, but because the orbital ball valve cannot solve the problems of material leakage and valve rod flying in the process of online replacing the filler, the process of replacing the filler must be performed in the closed state of the ball valve, which brings much inconvenience to the actual production.

CN212407634U discloses a track ball valve, including valve body, valve gap, disk seat, spheroid, valve rod and actuating mechanism, the valve gap inboard includes by lower supreme outer alloy bush, cyclic annular flange, the lower bush of packing, the sealed packing of V type, the packing is pressed the cover of locating the valve rod in proper order, the packing is pressed and is sheathe in still being equipped with the packing clamp plate of dismantling the connection with the valve gap, the spheroid is located in the fluid passage in the valve body, fluid passage mouth department is located to the disk seat, the valve rod both ends are connected with spheroid and actuating mechanism transmission respectively, the valve rod lower extreme is equipped with the valve rod and prevents flying the boss. But the upper valve rod in the technical scheme needs to rotate and move up and down simultaneously in the operation process, so that the sealing performance is difficult to improve.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects in the prior art and provide the split type corrugated pipe track ball valve.

The purpose of the utility model can be realized by the following technical scheme:

the technical scheme aims to protect the split type corrugated pipe track ball valve, which comprises a ball body, a valve cover, a valve seat and a valve rod, wherein the valve rod comprises an upper valve rod and a lower valve rod, the lower valve rod is connected with the upper part of the ball body, and the upper end of the lower valve rod is movably connected with the lower end of the upper valve rod, so that the lower valve rod can rotate along an axis independently of the upper valve rod;

a valve rod spiral groove is formed in the lower valve rod, and a positioning pin matched with the valve rod spiral groove is arranged on the valve cover;

the upper end of the upper valve rod is provided with an actuating mechanism, and the actuating mechanism can press or stretch the upper valve rod along the axial direction, so that the lower valve rod can spirally descend or ascend under the matching of the positioning pin and the valve rod spiral groove, and the ball body is driven to open and close relative to the valve seat.

Further, the valve rod spiral groove is spirally formed in the outer surface of the lower valve rod, one end of the positioning pin is arranged in the valve rod spiral groove, and when the lower valve rod is subjected to downward pressure or upward pulling force, the positioning pin slides along the valve rod spiral groove, so that the lower valve rod rotates.

Further, the lower end of the upper valve rod is provided with a flange, and the flange is movably sleeved at the upper end of the lower valve rod.

Further, the upper end of the lower valve rod is provided with a groove, the flange is arranged in the groove, the flange and the inner wall of the groove form clearance fit, and the flange is limited in the groove through a limiting piece.

Furthermore, the limiting part is an annular pressing ring with an edge, the annular pressing ring of the limiting part is sleeved on the upper valve rod, and the edge of the limiting part is fixed on the outer edge of the groove.

Furthermore, a corrugated pipe is arranged between the valve cover and the upper valve rod.

Further, a sealing gasket is fixed on the upper surface of the valve cover, and the sealing gasket seals the corrugated pipe in a gap between the outer surface of the upper valve rod and the inner surface of the valve cover.

Furthermore, a stuffing box shell is tightly pressed on the valve cover, stuffing is arranged between the inner wall of the stuffing box shell and the upper valve rod, and a gland is arranged above the stuffing box shell and seals the stuffing.

Furthermore, the sealing gasket is tightly pressed on the upper surface of the valve cover by the stuffing box shell, so that the sealing of the corrugated pipe is realized.

Furthermore, a support is further arranged on the stuffing box shell, a guide groove axially parallel to the upper valve rod is formed in the support, and a guide plate matched with the guide groove is arranged on the upper valve rod, so that the upper valve rod is prevented from rotating.

Compared with the prior art, the utility model has the following technical advantages:

1) adopt split type valve rod among this technical scheme, will descend valve rod and track groove to match for bellows fixed section separates in lower valve rod and the last valve rod, and the rotation of bellows is avoided when favourable lower valve rod track groove is rotatory, does not influence the mechanical structure of bellows with this, constitutes complete sealing function with this, avoids the fluid to reveal, has obviously promoted the security that improves the track ball valve.

2) The technical scheme constructs a split type stuffing box structure, and is favorable for the assembly of the corrugated pipe and the maintenance of subsequent products while enhancing the sealing performance.

3) The guide plate is arranged on the valve rod to prevent the upper valve rod from rotating in the opening and closing process, the corrugated pipe is prevented from being damaged due to the rotation of the valve rod, and the safety of the track ball valve is improved remarkably.

Drawings

Fig. 1 is a schematic structural diagram of a split bellows track ball valve in the present technical solution.

In the figure: 1. the valve comprises a ball body, 2, a valve body, 3, a valve cover, 4, an upper valve rod, 5, a lower valve rod, 6, a valve seat, 7, a flange, 8, a groove, 9, a limiting piece, 10, a corrugated pipe, 11, a sealing gasket, 12, a stuffing box shell, 13, a gland, 14, stuffing, 15, a guide plate, 16, a support, 17 and an actuating mechanism.

Detailed Description

The utility model is described in detail below with reference to the figures and specific embodiments.

Example 1

Split type bellows track ball valve in this embodiment includes spheroid 1, valve body 2, valve gap 3, disk seat 6 and valve rod, refers to fig. 1, the valve rod includes upper valve rod 4 and lower valve rod 5, lower valve rod 5 with the upper portion of spheroid 1 is connected, the upper end of lower valve rod 5 with the lower extreme swing joint of upper valve rod 4 makes lower valve rod 5 can be independent of upper valve rod 4 and rotate along the axle.

Be equipped with the valve rod helicla flute on the lower valve rod 5, be equipped with on the valve gap 3 with the locating pin that the valve rod helicla flute matches, the upper end of going up valve rod 4 is equipped with actuating mechanism 17, actuating mechanism 17 can press or stretch last valve rod 4 along axial direction for lower valve rod 5 realizes spiral decline or rises under the cooperation of locating pin and valve rod helicla flute, thereby drives the switching of the relative disk seat 6 of spheroid 1. The split valve rod in the technical scheme has the advantages that the lower valve rod is matched with the track groove, so that the corrugated pipe fixing section in the lower valve rod and the upper valve rod is separated, the rotation of the corrugated pipe is avoided when the lower valve rod track groove rotates, the mechanical structure of the corrugated pipe is not influenced, a complete sealing function is formed, fluid leakage is avoided, and the safety of the track ball valve is remarkably improved.

The valve rod spiral groove is spirally formed in the outer surface of the lower valve rod 5, one end of the positioning pin is arranged in the valve rod spiral groove, and when the lower valve rod 5 is subjected to downward pressure or upward pulling force, the positioning pin slides along the valve rod spiral groove, so that the lower valve rod 5 rotates.

The lower end of the upper valve rod 4 is provided with a flange 7, and the flange 7 is movably sleeved at the upper end of the lower valve rod 5. The upper end of lower valve rod 5 is equipped with recess 8, during recess 8 was located to flange 7,

flange

7 and 8 inner walls of recess constitute interference fit, and will through locating part 9 flange 7 is spacing in recess 8. The position member 9 is an annular pressing ring with an edge, the annular pressing ring of the position member 9 is sleeved on the upper valve rod 4, and the edge of the position member 9 is fixed on the outer edge of the groove 8. A corrugated pipe 10 is arranged between the valve cover 3 and the upper valve rod 4. And a sealing gasket 11 is fixed on the upper surface of the valve cover 3, and the corrugated pipe 10 is sealed in a gap between the outer surface of the upper valve rod 4 and the inner surface of the valve cover 3 by the sealing gasket 11.

In addition, the lower extreme of lower valve rod 5 is equipped with eccentric wedge arm during concrete implementation, and eccentric wedge arm is including locating wedge plate and the straight board of lower valve rod 5 main part lower extreme in proper order, and the central line of straight board sets up with the axis off-centre of valve rod main part. The lower valve rod 5 rotates, and then the eccentric wedge arm drives the ball body 1, so that a fluid through hole in the ball body 1 is communicated with a fluid channel in the valve body 2, and the track ball valve is opened. The valve rod 5 which rotates 90 degrees in a runner of the ball body 1 is moved downwards through the straight plate in the eccentric wedge arm, so that the eccentric wedge arm compresses the ball body 1 and the valve seat 6 to realize forced sealing, and the sealing performance of the track ball valve in the closing process is improved.

The valve cover 3 is further provided with a stuffing box shell 12 in a tightly pressed mode, stuffing 14 is arranged between the inner wall of the stuffing box shell 12 and the upper valve rod 4, a gland 13 is arranged above the stuffing box shell 12, and the gland 13 seals the stuffing 14. The stuffing box shell 12 tightly presses the sealing gasket 11 on the upper surface of the valve cover 3 to realize the sealing of the corrugated pipe 10. The technical scheme constructs a split type stuffing box structure, and is favorable for the assembly of the corrugated pipe and the maintenance of subsequent products while enhancing the sealing performance.

The stuffing box shell 12 is further provided with a support 16, the support 16 is provided with a guide groove axially parallel to the upper valve rod 4, and the upper valve rod 4 is provided with a guide plate 15 matched with the guide groove, so that the rotation of the upper valve rod 4 is avoided. The guide plate is arranged on the valve rod to prevent the upper valve rod from rotating in the opening and closing process, the corrugated pipe is prevented from being damaged due to the rotation of the valve rod, and the safety of the track ball valve is improved remarkably.

The valve in this embodiment adopts a fixed single-seat structure, which not only ensures zero leakage of the valve, but also avoids the problem of pressure rise of the valve cavity of the double-seat valve under the condition of cold-hot switching working condition.

Specifically, when the materials are selected, the material of the ball body 1 is CF8, the surface of the ball body 1 is hardened and overlaid with STL hard alloy, the hardness of the hard alloy with the net thickness of 3mm is HRC45-48, the sealing surface of the valve seat 6 is hardened and overlaid with STL hard alloy, and the hardness of the hard alloy with the net thickness of 3mm is HRC 42-45.

The embodiments described above are intended to facilitate the understanding and use of the utility model by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.

Claims

1. A split type corrugated pipe track ball valve comprises a ball body (1), a valve body (2), a valve cover (3), a valve seat (6) and a valve rod, and is characterized in that the valve rod comprises an upper valve rod (4) and a lower valve rod (5), the lower valve rod (5) is connected with the upper part of the ball body (1), and the upper end of the lower valve rod (5) is movably connected with the lower end of the upper valve rod (4), so that the lower valve rod (5) can rotate along an axis independently of the upper valve rod (4);

a valve rod spiral groove is formed in the lower valve rod (5), and a positioning pin matched with the valve rod spiral groove is arranged on the valve cover (3);

the upper end of the upper valve rod (4) is provided with an actuating mechanism (17), the actuating mechanism (17) can press or stretch the upper valve rod (4) along the axial direction, so that the lower valve rod (5) can spirally descend or ascend under the matching of the positioning pin and the valve rod spiral groove, and the ball body (1) is driven to open and close relative to the valve seat (6).

2. A split bellows track ball valve according to claim 1, wherein the stem spiral groove is spirally formed on the outer surface of the lower stem (5), and one end of the positioning pin is disposed in the stem spiral groove, and when the lower stem (5) is subjected to downward pressure or upward tension, the positioning pin slides along the stem spiral groove, thereby rotating the lower stem (5).

3. A split bellows track ball valve as claimed in claim 1 wherein the lower end of the upper valve stem (4) is provided with a flange (7), the flange (7) being movably sleeved on the upper end of the lower valve stem (5).

4. A split bellows-track ball valve according to claim 3, wherein the lower stem (5) has a groove (8) at its upper end, the flange (7) is disposed in the groove (8), the flange (7) forms a clearance fit with the inner wall of the groove (8), and the flange (7) is retained in the groove (8) by a retaining member (9).

5. A split bellows track ball valve according to claim 4, characterized in that the retainer (9) is an annular clamping ring with a rim, the annular clamping ring of the retainer (9) is sleeved on the upper valve rod (4), and the rim of the retainer (9) is fixed on the outer rim of the groove (8).

6. A split bellows-track ball valve according to claim 1, wherein a bellows (10) is provided between the bonnet (3) and the upper valve stem (4).

7. A split bellows-track ball valve as claimed in claim 6, wherein a sealing gasket (11) is fixed to the upper surface of the valve cover (3), and the sealing gasket (11) seals the bellows (10) in the gap between the outer surface of the upper valve stem (4) and the inner surface of the valve cover (3).

8. A split type corrugated pipe track ball valve as claimed in claim 7, wherein the valve cover (3) is further provided with a stuffing box shell (12) in a tightly pressed manner, a stuffing (14) is arranged between the inner wall of the stuffing box shell (12) and the upper valve rod (4), a gland (13) is arranged above the stuffing box shell (12), and the gland (13) seals the stuffing (14).

9. A split bellows-track ball valve according to claim 8, wherein the stuffing box housing (12) tightly presses the packing (11) against the upper surface of the valve cover (3) to seal the bellows (10).

10. A split bellows track ball valve according to claim 8, characterized in that the stuffing box housing (12) is further provided with a bracket (16), the bracket (16) is provided with a guide groove axially parallel to the upper valve rod (4), and the upper valve rod (4) is provided with a guide plate (15) matching with the guide groove, thereby preventing the upper valve rod (4) from rotating.