CN216519705U

CN216519705U - Explosion-proof ball valve of valve rod lower dress

Info

Publication number: CN216519705U
Application number: CN202120709719.8U
Authority: CN
Inventors: 牛国春; 张春阳; 冯均亮; 贾洪鑫
Original assignee: Hebei Guangde Fluid Control Ltd
Current assignee: Hebei Guangde Fluid Control Ltd
Priority date: 2021-04-08
Filing date: 2021-04-08
Publication date: 2022-05-13
Anticipated expiration: 2031-04-08

Abstract

The utility model relates to the technical field of ball valves, in particular to an explosion-proof ball valve with a lower-mounted valve rod; the ball valve comprises a valve body, a valve cover and a valve rod, wherein a ball cavity is arranged inside the valve body, an upper through hole communicated with the ball cavity is formed in the top end of the valve body, a middle boss is arranged in the upper through hole, a lower through hole communicated with the ball cavity is formed in the bottom end of the valve body, the top end of the valve rod sequentially penetrates through the lower through hole, the ball cavity and the upper through hole, a T-shaped boss matched with the middle boss is arranged at the bottom of the valve rod, a valve ball is arranged in the ball cavity, and a plugging mechanism is arranged at the position of the lower through hole; the valve rod can be installed at the lower through hole, the size of the original valve body appearance can be guaranteed, the size of a valve body ball cavity does not need to be increased, the valve rod can be prevented from exploding under high pressure, and safety is improved.

Description

Explosion-proof ball valve of valve rod lower dress

Technical Field

The utility model relates to the technical field of ball valves, in particular to an explosion-proof ball valve with a lower-mounted valve rod.

Background

It is well known that according to the "standard for steel ball valves for GBT 122372007 oil, petrochemical and related industries" the following: the valve rod of the ball valve is designed to be in a structure that the valve rod cannot be separated from the valve body when the sealing packing of the valve rod is detached (such as the packing gland is detached) under the action of medium pressure. If the lower end of the valve rod is designed to be a T-shaped structure, the valve rod is long in length and cannot be assembled from the ball cavity because the ball cavity of the valve body with a small specification is small, and the valve rod is interfered with the outer wall of the valve body; in order to not enlarge the overall dimension of the valve body, save materials and reduce cost, an upper-mounted valve rod structure is adopted, a boss is removed from a valve rod, the diameter design is matched with the size of a middle hole of the valve body, the valve rod is provided with a groove from the upper surface, the groove is clamped by a half-open ring and is matched with the lower hole of the middle hole of the valve body to play an explosion-proof effect, but because the half-open ring is separated from the valve body, the valve rod can fall off in the assembling and using processes, and the danger of explosion of the valve rod occurs under high pressure.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

Aiming at the defects of the prior art, the utility model provides the explosion-proof ball valve with the lower valve rod, which can ensure the size of the original valve body appearance, does not need to increase the size of a valve body ball cavity, can prevent the valve rod from exploding under high pressure and improve the safety.

(II) technical scheme

In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides an explosion-proof ball valve of dress under valve rod, includes valve body, valve gap and valve rod, the inside of valve body is provided with the ball chamber, the top of valve body be provided with the communicating last through-hole in ball chamber, upward be provided with well mouthful boss in the through-hole, the bottom of valve body be provided with the communicating lower through-hole in ball chamber, through-hole, ball chamber and last through-hole down are passed in proper order to the top of valve rod to be provided with in the bottom of valve rod with well mouthful boss complex T type boss, the ball intracavity is installed the valve ball, and lower through-hole department is provided with shutoff mechanism.

Preferably, the outer side of the valve rod is sleeved with a thrust washer, and the top end and the bottom end of the thrust washer are respectively attached to the bottom end of the middle boss and the top end of the T-shaped boss.

Preferably, the valve gap is provided with two sets of, and two sets of valve gaps pass through the bolt and install both ends about the valve body to be provided with the ball pad between valve gap and valve body, two sets of the ball pad pastes closely with the both ends of valve ball respectively.

Preferably, the top of valve ball is provided with the drive groove, the bottom of valve rod is provided with the drive shift fork, the bottom of driving the shift fork inserts to driving the inslot.

Preferably, the outside of valve rod is from upwards having set gradually sealing filler, clamping ring, butterfly pressure spring, first nut, lock washer, steel pad, handle and second nut down, first nut and second nut all pass through threaded connection with the valve rod.

Preferably, the inner diameter of the lower through hole is matched with the diameter of the T-shaped boss.

Preferably, the plugging mechanism is in threaded connection with the lower through hole, and a sealing sheet is arranged between the plugging mechanism and the lower through hole.

(III) advantageous effects

Compared with the prior art, the utility model provides an explosion-proof ball valve with a lower-mounted valve rod, which has the following beneficial effects:

1. according to the explosion-proof ball valve with the lower valve rod, the lower through hole is formed in the bottom of the valve body, the valve rod can be inserted into the bottom of the valve body for assembly, the position between the valve rod and the upper through hole is limited through the matching of the T-shaped boss and the middle boss, the middle boss presses the T-shaped boss of the valve rod, the valve rod is prevented from being blown out under the action of cavity pressure, the valve rod explosion-proof effect is achieved, the size of the original valve body shape can be ensured without increasing the size of a valve body ball cavity, the valve rod can be prevented from being exploded under high pressure, and the safety is improved;

2. the explosion-proof ball valve installed below the valve rod seals the lower through hole through the plugging mechanism, and the sealing performance of the lower through hole is guaranteed.

Drawings

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a schematic top view of the present invention;

FIG. 3 is a schematic cross-sectional view taken along the line of FIG. 2A-A of the present invention;

FIG. 4 is an enlarged view of a portion of FIG. 3B;

FIG. 5 is a schematic perspective view of the valve body of the present invention when cut away;

in the drawings, the reference numbers: 1. a valve body; 2. a valve cover; 3. a valve stem; 4. an upper through hole; 5. a middle boss; 6. a lower through hole; 7. a T-shaped boss; 8. a valve ball; 9. a plugging mechanism; 10. a thrust washer; 11. a ball pad; 12. driving a shifting fork; 13. sealing and filling; 14. pressing a ring; 15. a butterfly pressure spring; 16. a first nut; 17. a lock washer; 18. a steel pad; 19. a handle; 20. a second nut; 21. and (7) sealing the sheet.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-5, the explosion-proof ball valve with the lower valve rod 3 comprises a valve body 1, a valve cover 2 and a valve rod 3, wherein a ball cavity is arranged inside the valve body 1, an upper through hole 4 communicated with the ball cavity is formed in the top end of the valve body 1, a middle boss 5 is arranged in the upper through hole 4, a lower through hole 6 communicated with the ball cavity is formed in the bottom end of the valve body 1, the top end of the valve rod 3 sequentially penetrates through the lower through hole 6, the ball cavity and the upper through hole 4, a T-shaped boss 7 matched with the middle boss 5 is arranged at the bottom of the valve rod 3, a valve ball 8 is arranged in the ball cavity, and a blocking mechanism 9 is arranged at the lower through hole 6; the valve rod 3 can be inserted into the bottom of the valve body 1 for assembly by arranging the lower through hole 6 at the bottom of the valve body 1, and the position is limited between the valve rod 3 and the upper through hole 4 through the matching of the T-shaped boss 7 and the middle boss 5, so that the middle boss 5 presses the T-shaped boss 7 of the valve rod 3, the valve rod 3 is prevented from being blown out under the action of inner cavity pressure, the explosion-proof effect of the valve rod 3 is achieved, the size of the original valve body 1 can be ensured without increasing the size of a ball cavity of the valve body 1, the valve rod 3 can be prevented from being exploded under high pressure, and the safety is improved; the lower through hole 6 is sealed through the plugging mechanism 9, and the sealing performance of the lower through hole 6 is guaranteed.

A thrust washer 10 is sleeved on the outer side of the valve rod 3, and the top end and the bottom end of the thrust washer 10 are respectively attached to the bottom end of the middle-opening boss 5 and the top end of the T-shaped boss 7; the sealing between the middle boss 5 and the T-shaped boss 7 is increased by the thrust washer 10.

The valve covers 2 are provided with two groups, the two groups of valve covers 2 are arranged at the left end and the right end of the valve body 1 through bolts, ball pads 11 are arranged between the valve covers 2 and the valve body 1, and the two groups of ball pads 11 are respectively attached to two ends of a valve ball 8; the bonnet 2 may also be a one-sided mounting structure by sealing both ends of the valve ball 8 with ball gaskets 11.

A driving groove is formed in the top of the valve ball 8, a driving shifting fork 12 is arranged at the bottom end of the valve rod 3, and the bottom end of the driving shifting fork 12 is inserted into the driving groove; the valve rod 3 drives the valve ball 8 to rotate by driving the shifting fork 12.

The outer side of the valve rod 3 is sequentially provided with a sealing packing 13, a pressure ring 14, a butterfly pressure spring 15, a first nut 16, a check washer 17, a steel gasket 18, a handle 19 and a second nut 20 from bottom to top, and the first nut 16 and the second nut 20 are both in threaded connection with the valve rod 3; the sealing performance between the valve rod 3 at the upper through hole 4 and the valve body 1 is ensured through the sealing packing 13, the pressing ring 14, the butterfly-shaped pressure spring 15 and the first nut 16, and the valve rod 3 is driven to rotate through the handle 19.

The internal diameter of lower through-hole 6 and the diameter phase-match of T type boss 7 guarantee that valve rod 3 can install through the lower through-hole 6 of valve body 1, shutoff mechanism 9 passes through threaded connection with lower through-hole 6 to be provided with gasket 21 between shutoff mechanism 9 and lower through-hole 6, guarantee the sealed effect of through-hole 6 department down through gasket 21.

During assembly, the valve rod 3 is firstly installed through the lower through hole 6, the sealing performance between the middle boss 5 and the T-shaped boss 7 is ensured through the thrust washer 10, the handle 19 and the sealing mechanism at the upper part of the valve rod 3 are installed, a valve ball 8 is arranged on one side of the valve body 1, a driving shifting fork 12 at the bottom of the valve rod 3 is clamped into a driving groove, a ball pad 11 and a valve cover 2 on two sides are arranged, a sealing sheet 21 and a plugging mechanism 9 at the lower through hole 6 are finally arranged, the valve rod 3 and the upper through hole 4 are limited by the matching of a T-shaped boss 7 and a middle boss 5, the middle boss 5 presses the T-shaped boss 7 of the valve rod 3, the valve rod 3 is prevented from blowing out under the action of the pressure of the inner cavity, the explosion-proof effect of the valve rod 3 is achieved, the size of the ball cavity of the valve body 1 does not need to be increased, the size of the original valve body 1 can be ensured, the valve rod 3 can be prevented from exploding under high pressure, and the safety is improved; the lower through hole 6 is sealed through the plugging mechanism 9, and the sealing performance of the lower through hole 6 is guaranteed.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides an explosion-proof ball valve of dress under valve rod, includes valve body (1), valve gap (2) and valve rod (3), its characterized in that, the inside of valve body (1) is provided with the ball chamber, and the top of valve body (1) is provided with and goes up through-hole (4) with the communicating ball chamber, upward be provided with well mouthful boss (5) in through-hole (4), the bottom of valve body (1) is provided with and goes up through-hole (6) with the communicating lower through-hole in ball chamber, through-hole (6), ball chamber and last through-hole (4) under the top of valve rod (3) passes in proper order to be provided with in the bottom of valve rod (3) with well mouthful boss (5) complex T type boss (7), ball intracavity is installed valve ball (8), and through-hole (6) department down is provided with shutoff mechanism (9).

2. The explosion-proof ball valve with the lower valve rod is characterized in that a thrust washer (10) is sleeved on the outer side of the valve rod (3), and the top end and the bottom end of the thrust washer (10) are respectively attached to the bottom end of the middle boss (5) and the top end of the T-shaped boss (7).

3. The explosion-proof ball valve with the lower valve rod is characterized in that two groups of valve covers (2) are arranged, the two groups of valve covers (2) are arranged at the left end and the right end of the valve body (1) through bolts, ball pads (11) are arranged between the valve covers (2) and the valve body (1), and the two groups of ball pads (11) are respectively attached to the two ends of the valve ball (8).

4. The explosion-proof ball valve with the lower installed valve rod as claimed in claim 1, wherein the top of the valve ball (8) is provided with a driving groove, the bottom end of the valve rod (3) is provided with a driving fork (12), and the bottom end of the driving fork (12) is inserted into the driving groove.

5. The explosion-proof ball valve with the lower valve rod is characterized in that a sealing filler (13), a pressing ring (14), a butterfly-shaped pressure spring (15), a first nut (16), a check washer (17), a steel gasket (18), a handle (19) and a second nut (20) are sequentially arranged on the outer side of the valve rod (3) from bottom to top, and the first nut (16) and the second nut (20) are both in threaded connection with the valve rod (3).

6. The explosion-proof ball valve with the lower valve rod is characterized in that the inner diameter of the lower through hole (6) is matched with the diameter of the T-shaped boss (7).

7. The explosion-proof ball valve with the lower valve rod is characterized in that the blocking mechanism (9) is connected with the lower through hole (6) through threads, and a sealing sheet (21) is arranged between the blocking mechanism (9) and the lower through hole (6).