CN215172413U

CN215172413U - High-pressure-difference wear-resistant emergency cut-off ball valve

Info

Publication number: CN215172413U
Application number: CN202120699406.9U
Authority: CN
Inventors: 梁连金
Original assignee: Shk Valve Group Co ltd
Current assignee: Shk Valve Group Co ltd
Priority date: 2021-04-07
Filing date: 2021-04-07
Publication date: 2021-12-14
Anticipated expiration: 2031-04-07

Abstract

The utility model provides a wear-resisting ball valve that promptly cuts off of high pressure difference, including the fixed left vice valve body and the main valve body on right side together, the main valve body with vice valve body embeds there is the spheroid, the spheroid upwards is connected with the valve rod, a serial communication port, the spheroid with be equipped with the main valve seat between the vice valve body, the spheroid with be equipped with vice disk seat between the main valve body, the main valve body with the junction of vice valve body is equipped with the seal groove, be equipped with the triangle-shaped ring pad in the seal groove, the conical surface one side that the triangle-shaped ring filled up with main valve body contact, the another side with vice valve body contact. The utility model discloses a wear-resisting emergency cut-off ball valve of high pressure difference is fit for the high pressure difference promptly and cuts off or the unloading operating mode very much, and sustainable maintenance is sealed under temperature and the frequent change operating mode of pressure, and the valve does not have the card for a long time and hinders, the switch is nimble.

Description

High-pressure-difference wear-resistant emergency cut-off ball valve

Technical Field

The utility model belongs to the technical field of the valve, concretely relates to wear-resisting ball valve that promptly cuts off of high pressure difference.

Background

The high-pressure-difference wear-resistant emergency cut-off ball valve is mainly applied to emergency cut-off and emergency emptying positions in hydrogenation devices such as boiling bed residual oil hydrogenation, gasoline hydrogenation, diesel oil hydrogenation, kerosene hydrogenation, residual oil hydrogenation, coal tar hydrogenation, naphthenic base lubricating oil hydrogenation and the like. And the emergency cut-off or emptying is required to be completed within 5s of the valve, and VI-level sealing is achieved.

Taking a boiling bed residual oil hydrogenation device as an example, raw oil in the device is mainly vacuum residual oil, the percentage of the vacuum residual oil is 95.38 percent (wt), low-sulfur fuel oil or distillate oil is generated through hydrogenation reaction under the action of a catalyst, and unstable substances such as carbon residue, asphaltene and the like which are easy to polymerize and generate rubber are generated at the same time. The average diameter of the hydrogenation catalyst is about 1.08mm, the hardness is about 58HRC, the hydrogenation catalyst is mainly distributed in the catalyst processing unit, and a small amount of catalyst is also present in the reaction part. The highest operation temperature of the reaction unit of the device is 430 ℃, the highest operation pressure is 20.34MPa, and the main media are vacuum residue, low-sulfur fuel oil or catalytic materials, carbon residue, asphaltene, a small amount of catalyst, hydrogen sulfide and the like. The maximum operation temperature of the catalyst treatment unit of the device is 433 ℃, the maximum operation pressure is 19.94MPa, and the main media are catalyst, conveying wax oil and hydrogen sulfide. Because the medium contains hard and fine alumina catalyst and carbon residue or asphaltene, the operation condition of the valve is harsh, catalyst particles can enter the sealing pair to cause the valve to move incompletely, lose efficacy or leak, and a flow channel is selected to smooth the valve, so that the catalyst cannot be accumulated at the bottom of the valve to cause the valve to be closed untight. Traditional gate valve, stop valve all can't satisfy this requirement, and traditional fixed ball valve bottom has the trunnion to exist, causes catalyst and unstable material to pile up and the coking here easily, leads to the valve card to hinder, the action inefficacy.

Therefore, a new high pressure difference wear-resistant emergency cut-off ball valve needs to be developed to meet the harsh working condition requirements.

SUMMERY OF THE UTILITY MODEL

The utility model aims to improve the above-mentioned shortcoming that current wear-resisting promptly of high pressure difference cut off the ball valve and exist and not enough to a novel wear-resisting promptly of high pressure difference cut off the ball valve is provided, is fit for the high pressure difference and promptly cuts off or the unloading operating mode, and sustainable maintenance is sealed under temperature and the frequent change operating mode of pressure, and the valve does not have the card for a long time and hinders, the switch is nimble.

The utility model provides a wear-resisting ball valve that promptly cuts off of high pressure difference, the main valve body on left vice valve body and right side together fixed, the main valve body with vice valve body embeds there is the spheroid, the spheroid upwards is connected with the valve rod, the spheroid with be equipped with the main valve seat between the vice valve body, the spheroid with be equipped with vice disk seat between the main valve body, the main valve body with vice valve body's junction is equipped with the seal groove, be equipped with the triangle-shaped ring pad in the seal groove, the conical surface one side that the triangle-shaped ring filled up with main valve body contact, the another side with vice valve body contact, sustainable maintenance is sealed under temperature and the frequent change operating mode of pressure.

The utility model discloses further set up to, spheroidal bottom with leave the gap between the main valve body. The ball body adopts a floating ball, the bottom of the ball body is not provided with a trunnion for fixing the ball body, the structure is simple, the catalyst and unstable substances cannot be accumulated or coked at the bottom, and the valve can be ensured to have no blockage for a long time and to be flexibly opened and closed.

The utility model discloses further set up to, be fixed with the clamping ring on the right side terminal surface of vice valve body, the clamping ring with the right side terminal surface contact of main valve seat, restriction main valve seat axial float.

The utility model discloses further set up to, the main valve body with pretension dish type spring is equipped with between the vice disk seat. The elastic force generated by the compression of the pre-tightening disc-shaped spring acts on the auxiliary valve seat, so that the auxiliary valve seat and the ball body generate pre-tightening force, and sealing under low pressure difference and locking of the auxiliary valve seat and the ball body under high temperature are realized.

The utility model discloses further set up to, the valve pocket of the main valve body main valve seat perhaps be provided with on the sub-valve seat and wash the structure, wash the structure and can prevent that the medium from piling up or the coking on the valve pocket of the main valve body, main valve seat or sub-valve seat, prevent to block up the valve pocket of the main valve body, influence main valve seat or sub-valve seat and seal or increase the moment of torsion.

The utility model discloses further set up to, the left end face of main valve seat with the contact surface that vice valve body corresponds is equipped with the sclerosis processing layer, through pairing the grinding, forms the metal to metal seal structure.

The utility model discloses further set up to, the valve rod from bottom to top pass in proper order the bearing main valve body, low leakage combination pack, pack and press cover and gland, the top is connected with the shaft coupling, and the shaft coupling bottom is connected with the valve rod, and the top is connected with actuating mechanism, drives valve rod and spheroid and makes 90 rotatory operations to open or close the valve.

The utility model discloses further set up to, be located the spheroid top be equipped with the shaft shoulder on the valve rod, the bearing housing is located on the shaft shoulder and with main valve body contact.

The utility model discloses further set up to, the bearing has 2, and it is vice to increase a pair of friction, can stabilize the moment of torsion of valve rod, has effectively solved the dead problem of valve rod card appears easily in the single bearing, improves the security and the reliability of valve.

The utility model discloses further set up to, gland is fixed to through packing gland double-screw bolt on the main valve body, the cover is equipped with dish type spring assembly on the packing gland double-screw bolt, dish type spring assembly's top is fixed by packing gland nut locking.

The utility model discloses further set up to, the top of shaft coupling is connected with actuating mechanism, actuating mechanism's bottom is connected with the support, the bottom welding of support is in on the main valve body, the reliability that valve and actuating mechanism connect when ensureing that high pressure differential promptly cuts off.

To sum up, the utility model discloses following beneficial effect has:

1) the main valve body and the auxiliary valve body are sealed by adopting triangular ring gaskets, and can continuously maintain sealing under the working condition of frequent temperature and pressure changes.

2) The ball body adopts a floating ball, the bottom of the ball body is not provided with a trunnion for fixing the ball body, the structure is simple, the catalyst and unstable substances cannot be accumulated or coked at the bottom, and the valve can be ensured to have no blockage for a long time and to be flexibly opened and closed.

3) The contact surface of the left end face of the main valve seat and the corresponding auxiliary valve body is specially hardened and ground in a high-precision matching way to form a metal-to-metal sealing structure.

4) The valve rod shaft shoulder department sets up the double bearing structure, increases a pair of friction pair, can stabilize the moment of torsion of valve rod, has effectively solved the dead problem of valve rod card easily appearing in the single bearing, improves the security and the reliability of valve.

5) The bottom of the bracket is welded on the main valve body, so that the reliability of connection between the valve and the actuating mechanism is ensured when the high-pressure-difference emergency cut-off is carried out.

6) The flushing structure can be arranged on the valve cavity, the main valve seat or the auxiliary valve seat of the main valve body, so that media are prevented from being accumulated or coked on the valve cavity, the main valve seat or the auxiliary valve seat of the main valve body, the valve cavity of the main valve body is prevented from being blocked, the sealing of the main valve seat or the auxiliary valve seat is prevented from being influenced, or the torque is increased.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention;

fig. 2 is a view of the installation position of the flushing structure according to the embodiment of the present invention.

Wherein, 1, the main valve body; 2. a sub-valve body; 3. a stud; 4. a nut; 5. a triangular ring pad; 6. a main valve seat; 7. a sphere; 8. pressing a ring; 9. a screw; 10. a valve stem; 11. a bearing; 12. a low leakage packing combination; 13. pressing and sleeving the filler; 14. a packing gland; 15. packing and pressing the stud; 16. a disc spring set; 17. packing gland nuts; 18. a coupling; 19. a support; 20. a secondary valve seat; 21. pre-tightening the disc-shaped spring; 22. and (5) flushing the structure.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As a specific embodiment of the present invention, as shown in fig. 1, the high pressure difference wear-resistant emergency cut-off ball valve of the present embodiment mainly includes a main valve body 1, an auxiliary valve body 2, a main valve seat 6, a ball 7, a valve rod 10, a support 19, and an auxiliary valve seat 20, wherein:

the main valve body 1 and the auxiliary valve body 2 are fixed by a stud 3 and a nut 4 to form a two-section valve body structure. The joint of the main valve body 1 and the auxiliary valve body 2 is provided with a sealing groove, and a triangular ring gasket 5 is arranged in the sealing groove. The triangular ring gasket 5 is made of Inconel 718 or other materials, and is plated with gold or other materials on the surface, so that the sealing can be continuously kept under the working condition of frequent temperature and pressure changes. The main valve body 1 and the auxiliary valve body 2 can be made of forged pieces or castings, preferably forged pieces, so that the inherent defects of the castings, such as air holes, slag inclusion, looseness and the like, can be overcome, and the integrity of a pressure boundary is higher than that of the castings.

The main valve seat 6 is arranged in the auxiliary valve body 2 and clamps the ball body 7, the contact surface of the left end face of the main valve seat 6 corresponding to the auxiliary valve body 2 is hardened to form a hardened layer, and the hardened layer is paired and ground to form a metal-to-metal sealing structure. When the valve is in a closed state, medium pressure acts on the sealing surface of the main valve seat 6 through the ball body 7, and meanwhile, the left end surface of the main valve seat 6 is in close contact with the corresponding contact surface of the auxiliary valve body 2, and the sealing effect is better when the medium pressure is larger.

The ball 7 is located inside the main valve body 1 and is clamped by the main valve seat 6 and the secondary valve seat 20. A square hole is arranged above the ball body 7 and is used for connecting the valve rod 10. The ball body 7 adopts a floating ball, the bottom of the ball body is not provided with a trunnion for fixing the ball body 7, the structure is simple, the catalyst and unstable substances can not be accumulated or coked at the bottom, and the valve can be ensured to have no blockage for a long time and to be flexibly opened and closed.

The pressing ring 8 is fixed on the right end face of the auxiliary valve body 1 through a screw 9 and contacts with the right end face of the main valve seat 6 to limit the axial movement of the main valve seat 6.

The valve rod 10 sequentially passes through the bearing 11, the main valve body 1, the low-leakage combined packing 12, the packing pressing sleeve 13 and the packing pressing cover 14 from bottom to top, the bottom of the valve rod is connected with a square hole above the ball body 7, and the top of the valve rod is connected with the coupling 18.

The bearing 8 is sleeved on the shaft shoulder of the valve rod 7 and contacts with the upper end face of the inner hole in the middle of the main valve body 1, and the number of the bearing is 2. 7 shoulders of valve rod department sets up the double bearing structure, increases a pair of friction pair, can stabilize the moment of torsion of valve rod 7, has effectively solved the easy dead problem of valve rod 7 card that appears of single bearing, improves the security and the reliability of valve.

A section of cavity is arranged between the upper part of the main valve body 1 and the valve rod 10, a low-leakage combined packing 12 and a packing pressing sleeve 13 are sequentially arranged in the cavity from bottom to top, the upper part of the packing pressing sleeve 13 is covered by a packing gland 14, and the packing gland 14 is provided with a fixing hole and is fixed on the main valve body 1 by a fixing piece. In this embodiment, the packing gland 14 is fixed to the main valve body 1 by a packing gland stud 15, a disc spring set 16 is sleeved on the packing gland stud 15, and the top of the disc spring set 16 is locked and fixed by a packing gland nut 17. In the process of alternating temperature and stress, the pretightening force of the low-leakage combined packing 12 is continuously compensated, and the medium is prevented from leaking outwards from the valve rod 10.

The bottom of the coupling 18 is connected with the valve rod 10, and the top is connected with the actuating mechanism to drive the valve rod 10 and the ball body 7 to rotate 90 degrees, so that the valve is opened or closed.

The top of the bracket 19 is connected with the actuating mechanism, and the bottom is welded on the main valve body 1, so that the reliability of connection between the valve and the actuating mechanism is ensured when the high-pressure-difference emergency cut-off occurs.

The sub-valve seat 20 is mounted inside the main valve body 1 and holds the ball 7. The pre-tightening disc-shaped spring 21 is arranged in the main valve body 1, the left end face of the pre-tightening disc-shaped spring is in contact with the auxiliary valve seat 20, and the right end face of the pre-tightening disc-shaped spring is in contact with the main valve body 1. The elastic force generated by the compression of the pre-tightening disc-shaped spring 21 acts on the auxiliary valve seat 20, so that the auxiliary valve seat 20 and the ball body 7 generate pre-tightening force, and sealing under low pressure difference and locking of the auxiliary valve seat 20 and the ball body 7 under high temperature are realized.

Furthermore, a flushing structure 22 can be arranged on the valve cavity of the main valve body 1, and when the valve is switched or used again, the valve cavity of the main valve body 1 is flushed at a specific flow rate, so that the medium is prevented from accumulating or coking in the valve cavity of the main valve body 1. In the same manner, flushing structures (not shown in fig. 2) may be provided on the primary 6 or secondary 20 seats to prevent media from building up or coking on the primary 6 or secondary 20 seats to affect sealing or increase torque.

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 utility model provides a wear-resisting ball valve that promptly cuts off of high pressure difference, is including the fixed left vice valve body and the main valve body on right side together, the main valve body with vice valve body embeds there is the spheroid, the spheroid upwards is connected with the valve rod, a serial communication port, the spheroid with be equipped with the main valve seat between the vice valve body, the spheroid with be equipped with vice disk seat between the main valve body, the main valve body with the junction of vice valve body is equipped with the seal groove, be equipped with the triangle-shaped ring pad in the seal groove, the conical surface one side of triangle-shaped ring pad with main valve body contact, the another side with vice valve body contact.

2. A high differential pressure, wear resistant slam shut ball valve as in claim 1 wherein a gap is left between the bottom of the ball and the main valve body.

3. A high pressure differential wear-resistant emergency cutoff ball valve as recited in claim 1 wherein a clamping ring is fixed to a right end face of said secondary valve body, said clamping ring contacting a right end face of said primary valve seat to limit axial play of said primary valve seat.

4. A high differential pressure, wear resistant slam shut ball valve as in claim 1 wherein a pre-tensioned disc spring is mounted between said primary valve body and said secondary valve seat.

5. A high differential pressure, wear resistant slam shut ball valve as in claim 1 wherein a flushing structure is provided on the valve cavity of the main valve body, the main valve seat or the secondary valve seat.

6. A high differential pressure, wear-resistant, emergency shutdown ball valve as claimed in claim 1, wherein the left end face of the primary valve seat and the corresponding contact surface of the secondary valve body are provided with a hardened layer.

7. The high pressure difference wear-resistant emergency cut-off ball valve according to any one of claims 1 to 6, wherein the valve rod passes through the bearing, the main valve body, the low-leakage combined packing, the packing pressing sleeve and the packing pressing cover from bottom to top in sequence, and a coupling is connected to the top of the valve rod.

8. The high differential pressure, wear-resistant emergency cutoff ball valve of claim 7, wherein a shoulder is provided on the valve stem above the ball, the bearing is sleeved on the shoulder and contacts the main valve body, and there are 2 bearings.

9. The high differential pressure wear-resistant emergency cutoff ball valve according to claim 7, wherein the packing gland is fixed to the main valve body by a packing gland stud, a disc spring set is sleeved on the packing gland stud, and the top of the disc spring set is locked and fixed by a packing gland nut.

10. The high pressure differential wear-resistant emergency cutoff ball valve according to claim 7, wherein an actuator is connected to a top portion of the coupling, a support is connected to a bottom portion of the actuator, and the bottom portion of the support is welded to the main valve body.