CN214274556U

CN214274556U - On-line maintenance ball valve

Info

Publication number: CN214274556U
Application number: CN202120189276.4U
Authority: CN
Inventors: 蒋小平
Original assignee: Shanghai Qiyu Mechanical And Electrical Equipment Co ltd
Current assignee: Shanghai Qiyu Mechanical And Electrical Equipment Co ltd
Priority date: 2021-01-23
Filing date: 2021-01-23
Publication date: 2021-09-24
Anticipated expiration: 2031-01-23

Abstract

The utility model provides an online maintenance ball valve is provided with globular case in the valve body, and an organic whole is connected with the installation pipe on the valve body, and the installation pipe is arranged with the case is concentric, and valve rod assembly inserts from the installation pipe and constitutes detachable the connection with the case, and valve rod assembly includes the valve rod, and in the valve rod inserted the installation pipe from the top, this section pole body was gone up the cover and is equipped with direction seal assembly, and the cover is equipped with the gland on the valve rod shaft of the mouth of pipe position department of installation pipe, and the gland passes through bolt and installation pipe fixed connection. Installation pipe and valve body integrated into one piece cast, can guarantee installation pipe and valve pocket axiality, just also guaranteed the axiality of installation pipe and globular case, the inner end of valve rod just can insert very easily in the slot on the spheroid, convenient assembling and precision are high, more importantly the valve rod inserts in the installation pipe from the top, if when discovering the seepage of valve rod department, only need with the valve rod follow the installation pipe dismantle get off can change on line, the maintenance, need not to dismantle whole ball valve from the pipeline, easy operation.

Description

On-line maintenance ball valve

Technical Field

The utility model belongs to the technical field of the valve is made, especially involve an online maintenance ball valve.

Background

The ball valve has the advantages of simple structure, good sealing performance, small driving moment, simple and convenient operation and easy realization of quick opening and closing, and is one of the commonly used valves. The ball valve is developed from a plug valve, and the opening and closing element of the ball valve is a ball body which is rotated by 90 degrees around the axis of a valve rod to realize the opening and closing purposes. Most of common ball valves are of a side-mounted type, namely a valve rod enters a cavity from the side face of a valve body and is mounted from the inner end to the outer end of a mounting pipe, when the ball valve breaks down on a pipeline and needs to be maintained, the whole ball valve is firstly removed from the pipeline, then the valve body and a spherical valve core are detached for maintenance, the pipeline is long in shutdown time, and the maintenance cost is high.

In order to solve the above-mentioned purpose, the chinese application entitled "upper-mounted floating ball valve capable of on-line maintenance" (application publication No. CN 103925388A) discloses the following technical solutions: comprises a valve body, a valve cover matched with the valve body, a ball body, a valve rod, a positioning screw, a butterfly spring and a handle; the ball body is arranged in the valve body, and the valve cover is arranged at the upper part of the valve body to form an accommodating cavity for sealing the ball body; the valve rod penetrates through the top of the valve cover to be detachably connected with the ball body, valve rod packing is arranged between the top end of the valve cover and the valve rod, a butterfly spring is further sleeved on the valve rod to be tightly pressed on the valve rod packing, and the connecting end of the handle is sleeved and fixed at the top end of the valve rod through a positioning screw; and a thrust pad is arranged between the bottom of the ball body and the valve body in a cushioning manner and is used for ensuring the stability of the ball valve during opening and closing. Among the above-mentioned scheme, set up the valve rod on the valve bonnet, the protruding spheroid department of stretching to of valve rod inner end constitutes can dismantle the connection, when needs maintenance, only need with the valve bonnet follow the valve body demolish can, and the valve body itself need not to demolish from the pipeline. However, in the ball valve with the structure, the valve cover serving as a carrier of the valve rod and the valve body are mutually independent workpieces, the coaxiality cannot be ensured, and the inner end of the valve rod is difficult to align with the slot on the ball body when the ball valve is assembled for the first time and is assembled again after maintenance; secondly, in the process of removing the valve rod, the ball body is restrained and disappears, and is easy to rotate or move in the valve body, so that the position of the slot on the ball body is staggered, and the difficulty of secondary assembly is further increased.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a ball valve is maintained on line that easy dismounting and assembly precision are high.

In order to realize the purpose, the utility model discloses a technical scheme be: the utility model provides an online maintenance ball valve, which comprises a valve body, be provided with globular case in the valve body, an organic whole is connected with the installation pipe on the valve body, the tube core and the case of installation pipe are arranged with one heart, valve rod assembly inserts and constitutes detachable the connection with the case from the installation pipe, valve rod assembly adjusts the communicating work position of route on the case and the valve body that the case rotates to the case, or rotate the position that ends of passageway and the passageway dislocation on the case, valve rod assembly includes the valve rod, the valve rod inserts in the installation pipe from the top, the cover is equipped with direction seal assembly on this section pole body, the cover is equipped with the gland on the valve rod body of the mouth of pipe position department of installation pipe, the gland passes through bolt and installation pipe fixed connection.

Among the above-mentioned scheme, installation pipe and valve body integrated casting shaping, can guarantee installation pipe and valve pocket axiality, the axiality of installation pipe and globular case has just also been guaranteed, during the assembly, the inner end of valve rod just can be inserted in the slot on the spheroid very easily, convenient assembling and precision are high, more importantly the valve rod inserts in the installation pipe from the top, if discover valve rod department when seepage, only need to dismantle the valve rod from the installation pipe and can change on line, the maintenance, need not to dismantle whole ball valve from the pipeline, easy operation.

Drawings

FIG. 1 is a cross-sectional view of a ball valve;

FIG. 2 is an exploded view of the ball valve;

fig. 3 is a partially enlarged view of fig. 1.

Detailed Description

The utility model provides an online maintenance ball valve, including valve body 10, be provided with globular case 20 in the valve body 10, an organic whole is connected with installation pipe 11 on the valve body 10, the tube core and the case 20 of installation pipe 11 are arranged with one heart, valve rod assembly 30 inserts from installation pipe 11 and constitutes detachable the connection with case 20, valve rod assembly 30 adjusts the communicating work position of route on route and the valve body 10 on the case 20 that case 20 rotates to the case 20, or rotate to the stop position of the passageway dislocation on case 20 and the passageway on the valve body 10, valve rod assembly 30 includes valve rod 31, valve rod 31 inserts in the installation pipe 11 from the top, that is to say, the diameter of valve rod 31 is less than the diameter of installation pipe 11, the cover is equipped with direction seal assembly 40 on this section pole, the cover is equipped with gland 32 on the pole 31 pole body of the mouth position department of installation pipe 11, gland 32 passes through bolt 33 and installation pipe 11 fixed connection. The valve rod 31 is inserted into the installation pipe 11 from the upper part, the valve rod 31 is axially limited and fixed on the valve body 10 by the gland 32, meanwhile, the installation pipe 11 and the valve body 10 are integrally cast and molded, the coaxiality of the installation pipe 11 and a valve cavity can be ensured, the coaxiality of the installation pipe 11 and the spherical valve core 20 is also ensured, when the installation and the re-assembly are carried out after the maintenance are finished for the first time, the inner end (defined here: one end of the valve rod 31 close to the valve core 20 is the inner end, and the other end far away from the valve core 20 is the outer end) of the valve rod 31 can be easily inserted into the slot on the sphere, the disassembly and the assembly are convenient and quick, and the precision is high; more importantly, the valve rod is inserted into the installation pipe from the upper part, if leakage of the valve rod 31 is found, the valve rod 31 can be replaced and maintained on line only by being disassembled from the installation pipe 11, the whole ball valve is not required to be disassembled from the pipeline, and the operation is simple.

As a preferred scheme of the present invention, a convex ring 312 is disposed on a middle shaft of the valve rod 31, an outer diameter of the convex ring 312 is matched with an inner diameter of the mounting tube 11, a necking step 111 is disposed at an inner end of the mounting tube 11 adjacent to an inner cavity of the valve body 10, an O-shaped sealing ring 41 and a spring 42 are sequentially sleeved on a shaft of the valve rod 31 between the convex ring 312 and the necking step 111 from outside to inside, and the spring 42 provides an elastic force to drive the O-shaped sealing ring 41 to elastically deform to seal an annular chamber between the valve rod 31 and the mounting tube 11. In the using process, when the O-shaped sealing ring 41 is worn, the spring 42 provides elastic force all the time to drive the O-shaped sealing ring 41 to elastically deform, so that the inner ring of the O-shaped sealing ring 41 is sealed with the valve rod 31, and the outer ring of the O-shaped sealing ring 41 is sealed with the inner wall of the mounting pipe 11.

A lining ring 43 is arranged between the necking step 111 and the valve rod 31, flat gaskets 44 are arranged between the convex ring 312 and the gland 32, between the convex ring 312 and the O-shaped sealing ring 41 and between the O-shaped sealing ring 41 and the spring 42, the outer diameter of each flat gasket 44 is matched with the inner diameter of the mounting pipe 11, and the inner diameter of each flat gasket 44 is matched with the outer diameter of the valve rod 31. The bushing 43 and the flat pad 44 serve as a guide to ensure that the valve rod 31 moves in a predetermined direction, thereby improving the assembly accuracy.

Further, the bushing 43 includes a sleeve 431 disposed around the valve rod 31, an outer wall of the sleeve 431 abuts against a step surface of the step 111, an outer flange 432 is outwardly disposed at an upper end of the sleeve 431, the outer flange 432 abuts against a table surface of the step 111, and a metal gasket 45 is disposed between the spring 42 and the outer flange 432. Since the outboard flange 432 is relatively thin, in order to prevent the end of the spring 42 from damaging the outboard flange 432, a metal gasket 45 is disposed between the spring 42 and the outboard flange 432 for protection, and the flat pad 44 at the other end of the spring 42 can be disposed to be thick, because the flat pad 44 provides a guiding function for the movement of the valve rod 31, no additional protective gasket is required between the spring 42 and the flat pad 44.

The lining ring 43 and the flat pad 44 are made of polytetrafluoroethylene materials, the polytetrafluoroethylene materials have the characteristics of oil resistance, acid resistance, alkali resistance and various organic solvents resistance, and are almost insoluble in all solvents, meanwhile, the polytetrafluoroethylene has the characteristics of high temperature resistance and low temperature resistance, and the friction coefficient is extremely low, so that the polytetrafluoroethylene has a self-lubricating effect.

The gland 32 comprises a pressing plate 321, a through hole 323 for the valve rod 31 to pass through is formed in the pressing plate 321, a pressing pipe 322 extends on the surface of the pressing plate 321 close to the installation pipe 11, the shaft core of the through hole 323 and the pressing pipe 322 are collinear, the pressing pipe 322 is inserted into the installation pipe 11 and is pressed with the flat gasket 44, the position of the valve rod 31 is fixed by the gland 32 due to the limiting of the convex ring 312, an annular groove 324 is formed in the inner wall of the through hole 323, and a dust ring 325 is arranged in the groove 324 to prevent dust and water from entering the installation pipe 11.

In order to realize that the valve core 20 can be installed in the inner cavity of the valve body 10, the valve body 10 is formed by butting a first half body 13 and a second half body 14, outer flanges of the first half body 13 and the second half body 14 are fixedly connected through bolts 15, an installation pipe 11 is arranged on the second half body 14 and is integrally cast and molded with the second half body 14, and a plurality of installation holes 112 are arranged at intervals in the circumferential direction at the outer end part of the installation pipe 11. During the assembly, assemble valve rod assembly 30 in the installation pipe 11 earlier, dock valve core 20 parcel inside with first, two

halfbodies

13, 14 again, at last with bolt 15 fixed connection, if find valve rod 31 department when seepage, can change O shape sealing washer 41 on line, need not to dismantle whole ball valve from the pipeline, easy operation.

In order to prevent liquid in the pipeline from entering the cavity between the valve core 20 and the valve body 10, a stepped hole 12 is arranged at the port of the passage of the valve body 10, which is matched with the valve core 20, and a compensation sealing assembly 60 is arranged in the stepped hole 12 to seal the outer wall of the valve core 20 close to the port with the inner wall of the valve body 10 so as to compensate abrasion and prolong the service life of the ball valve.

Claims

1. The utility model provides an online maintenance ball valve, includes valve body (10), is provided with globular case (20) in valve body (10), its characterized in that: the valve body (10) is integrally connected with an installation pipe (11), a pipe core of the installation pipe (11) and a valve core (20) are concentrically arranged, a valve rod assembly (30) is inserted from the installation pipe (11) and is detachably connected with the valve core (20), the valve rod assembly (30) adjusts the working position of a passage on the valve core (20) and a passage on the valve body (10) in a way of rotating the valve core (20) or a stop position of a passage on the valve core (20) and a passage on the valve body (10) in a staggered way, the valve rod assembly (30) comprises a valve rod (31), the valve rod (31) is inserted into the installation pipe (11) from the upper part, a guide sealing assembly (40) is sleeved on the rod body of the section, a gland (32) is sleeved on the rod body of the valve rod (31) at the position of a pipe orifice of the installation pipe (11), and the gland (32) is fixedly connected with the installation pipe (11) through a bolt (33).

2. The online maintenance ball valve of claim 1, wherein: a convex ring (312) is arranged on a rod body in the middle of a valve rod (31), the outer diameter of the convex ring (312) is matched with the inner diameter of a mounting pipe (11), a necking step (111) is arranged at the inner end, close to the inner cavity of a valve body (10), of the mounting pipe (11), an O-shaped sealing ring (41) and a spring (42) are sequentially sleeved on the rod body of the valve rod (31) between the convex ring (312) and the necking step (111) from outside to inside, and the spring (42) provides elastic force to drive the O-shaped sealing ring (41) to elastically deform to seal an annular cavity between the valve rod (31) and the mounting pipe (11).

3. The online maintenance ball valve of claim 2, wherein: a lining ring (43) is arranged between the necking step (111) and the valve rod (31), flat gaskets (44) are arranged between the convex ring (312) and the gland (32), between the convex ring (312) and the O-shaped sealing ring (41) and between the O-shaped sealing ring (41) and the spring (42), the outer diameter of each flat gasket (44) is matched with the inner diameter of the mounting pipe (11), and the inner diameter of each flat gasket (44) is matched with the outer diameter of the valve rod (31).

4. The online maintenance ball valve of claim 2, wherein: the lining ring (43) comprises a sleeve (431) sleeved on the periphery of the valve rod (31), the outer wall of the sleeve (431) is attached to the step surface of the necking step (111), an external flanging (432) is outwards arranged at the upper end of the sleeve (431), the external flanging (432) is attached to the table surface of the necking step (111), and a metal gasket (45) is arranged between the spring (42) and the external flanging (432).

5. An on-line maintenance ball valve according to claim 3 or 4, wherein: the lining ring (43) and the flat pad (44) are made of polytetrafluoroethylene materials.

6. The online maintenance ball valve of claim 2, wherein: the lower end of the valve rod (31) is convexly provided with a linear convex block (311) towards the valve core (20), the linear convex block (311) is inserted into a linear slot (21) formed in the valve core (20) to form axial movement fit and circumferential synchronous rotation fit of the valve rod (31), and the outer end of the valve rod (31) is provided with a rotating handle (34).

7. The online maintenance ball valve of claim 4, wherein: gland (32) including clamp plate (321), set up through-hole (323) that supply valve rod (31) to pass on clamp plate (321), it has presses pipe (322) to extend on clamp plate (321) near the face of installation pipe (11), through-hole (323) and press pipe (322) axle center collineation, press pipe (322) insert arrange in installation pipe (11) and with flat pad (44) pressfitting, annular groove (324) have been seted up on the inner wall of through-hole (323), be provided with dust ring (325) in recess (324).

8. The online maintenance ball valve of claim 1, wherein: the valve body (10) is formed by butting a first half body and a second half body (13 and 14), outer flanges of the first half body and the second half body (13 and 14) are fixedly connected through bolts (15), the mounting pipe (11) is arranged on the second half body (14) and is integrally cast and formed with the second half body (14), and a plurality of mounting holes (112) are formed in the circumferential direction of the end part of the outer end of the mounting pipe (11) at intervals.

9. The online maintenance ball valve of claim 1, wherein: a stepped hole (12) is formed in the opening of the valve body (10) passage matched with the valve core (20), and a compensation sealing assembly (60) is arranged in the stepped hole (12) to seal the outer wall of the valve core (20) close to the opening with the inner wall of the valve body (10).