CN2926703Y

CN2926703Y - Valve of telescopic sealed casing

Info

Publication number: CN2926703Y
Application number: CN 200620034937
Authority: CN
Inventors: 史双双
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-07-14
Filing date: 2006-07-14
Publication date: 2007-07-25
Anticipated expiration: 2016-07-14

Abstract

The utility model discloses a valve with expandable sealed cover, in particular valve for handwheel-type rotary structure, which belongs to valve of fluid switch and aims to overcome fluid overflow such as steam from seam of screw thread between valve rod and nut cap. The utility model is made by that switch heat 4 of handwheel valve rod 3 of current valve is sleeved by an expandable sealed tube 6, and wider edge 7 of the expandable sealed tube 6 is pressed on junction face 8 of the nut cap 2 and valve body 1. The expandable sealed tube 6 is fixed on bottom of inner surface of the expandable sealed tube 6 through a T-shaped pressing plate 5. The expandable sealed tube 6 is a concave rubber tube with one end of which is openable. The utility model has the advantages of that: the valve rod does not act as passage for fluid, and fluid can not overflow from seam of screw thread between the valve rod and the nut cap; secondly, bottom of the expandable sealed tube is abrasion resisting type.

Description

The valve that telescopic stuffing box gland is arranged

Technical field

The utility model belongs to the valve technology field of fluid switch, particularly the valve of hand-wheel-type rotational structure.

Background technique

The handwheel and the moving sealed closure of the valve of existing fluid switch are one, or are connected to the one relative position without any changing.This valve is when carrying out switch motion, rotation hand wheel, moving sealed closure is rotation thereupon also, switching function is that handwheel rotates in nut cap and produces upper and lower displacement and put and make moving sealed closure also produce upper and lower displacement, make moving sealed closure and switch mouth produce displacement, thereby moving sealed closure is beaten mouth or off switch mouth, realizes the function to valve.This valve has two shortcomings: the one, and fluid directly contacts the valve rod below the handwheel, and the very easy thread pitch between valve rod and nut cap of fluid overflows, and the gas leakage of leaking of handwheel place takes place, and this handwheel place leaks, and to leak gas be the long-term indeterminable problem of people; The 2nd, the rotation of moving sealed closure becomes spin friction with switch mouth annular ring, and the cushion rubber of moving sealed closure is very easy to wear to be caused badly, causes poorly sealedly, and fluid overflows to the other end from switch one end.

Summary of the invention

The purpose of this utility model provides a kind of valve of fluid switch of difficult generation spill and leakage.

Structure of the present utility model is: the valve that telescopic stuffing box gland is arranged, comprise the existing fluid inlet and outlet valve body 1 that has, the opening that coupling nut lid 2 is arranged in the middle of the valve body 1, then valve body 1 middle opening position is bolted with nut cap 2, nut cap 2 centers are threaded with handwheel valve rod 3, handwheel valve rod 3 nut cap 2 centers rotations make handwheel valve rod 3 near or away from the switch mouth 11 in the valve body 1, be provided with switch mouth 11 in the fluid passage in the middle of the valve body 1 of nut cap 2 correspondences, switch mouth 11 planes are vertical with handwheel valve rod 3.On the basis of this existing structure.

Improvement of the present utility model is: switch mouth 11 ends that connect of handwheel valve rod 3 are provided with telescopic sealed pipe 6, T shape press seal plate 5 sockets that connect switch mouth 11 ends and telescopic sealed pipe 6 bottoms of handwheel valve rod 3.Telescopic sealed pipe 6 is the spill sebific ducts that have only an end opening, and opening end has broad edge 7, and broad edge 7 press seals are at the crimping face 8 of nut cap 2 and valve body 1.Telescopic sealed pipe 6 is all sealed the part of handwheel valve rod 3 at valve, the fluid of valve of flowing through can not contact handwheel valve rod 3, can only be in the Seal cage of valve body 1, so this structure of the present utility model is almost cut the end and has been solved the very easy thread pitch between handwheel valve rod and nut cap of fluid and overflow, the gas leakage of leaking of handwheel place takes place, this long-term indeterminable problem.

The rotation of the moving sealed closure of existing valve becomes spin friction with switch mouth annular ring, and the cushion rubber of moving sealed closure is very easy to wear to be caused bad and the gas leakage of leaking, and this problem has following structure to solve:

The switch head 4 of handwheel valve rod 3, be that handwheel valve rod 3 is held and telescopic sealed pipe 6 sockets with the approaching of switch mouth 11, the mode of socket is: switch head 4 is enclosed within the middle of the telescopic sealed pipe 6, the base plate of the telescopic sealed pipe 6 of the displacement drive of switch head 4, because compressing with switch mouth 11, telescopic sealed pipe 6 to reach fluid-encapsulated as water, gas, so telescopic sealed pipe 6 is used colloidal materials, and colloidal materials is firmly driven bottom with the telescopic sealed pipe 6 of rapid wear by the switch head 4 of handwheel valve rod 3.So fix a golden part in the bottom of telescopic sealed pipe 6, it is T shape press seal plate 5, play two effects with T shape press seal plate 5: the one, the driving force of the switch head 4 of handwheel valve rod 3 is distributed to whole bottoms of telescopic sealed pipe 6, the bottom section that contacts with switch mouth 11 particularly, the bottom of telescopic like this sealed pipe 6 is stressed evenly not fragile, and it is tighter to split critical point 11; The 2nd, rotatablely moving of the switch head 4 of handwheel valve rod 3 and front-rear reciprocation movement are become the power of only bottom of telescopic sealed pipe 6 being transmitted front-rear reciprocation movement, then switch head 4 does not rotate friction with the bottom colloidal materials of telescopic sealed pipe 6, does not have spin friction naturally the bottom of telescopic sealed pipe 6 is damaged.So the switch head 4 of handwheel valve rod 3 is the loose telescopic sealed pipes 6 that are enclosed within, with 5 sockets of T shape press seal plate.

Concrete telescopic sealed pipe 6 structures are: T shape press seal plate 5 is fixed on the bottom 9 of telescopic sealed pipe 6 inner faces; Telescopic sealed pipe 6 is the spill sebific ducts that have only an end opening, and opening end has broad edge 7, and broad edge 7 press seals are at the crimping face 8 of nut cap 2 and valve body 1.The switch head 4 of wheel valve rod 3 is from loose being inserted in of telescopic sealed pipe 6 opening ends, with the middle socket post socket of T shape press seal plate 5.

The position because the broad edge 7 of telescopic sealed pipe 6 has been fixed, and telescopic sealed pipe 6 bottoms 9 are again with switch head 4 to-and-fro motion the plaing a part switch valve of taking turns valve rod 3, so telescopic sealed pipe 6 should have the stretchability of vibration-direction, so between the broad edge 7 of telescopic sealed pipe 6 and bottom 9, be provided with flexible ripple 10 structures, press reciprocating motion length length, can establish one or more flexible ripple 10 structures.

Advantage of the present utility model: the one, valve rod is fluid directly, fluid can not overflow from the thread pitch between valve rod and the nut cap, the gas leakage of leaking of handwheel place can not take place, solved valve around the valve rod to valve leakage out of steam system water this long-term indeterminable technical problem of leaking gas; The 2nd, moving sealed closure no longer rotates, and does not produce spin friction, moving sealed closure be telescopic sealed pipe of the present utility model bottom not easy to wear cause bad.

Description of drawings

Fig. 1 is a cross-sectional view of the present utility model;

Fig. 2 is the structural representation of the T shape press seal plate of telescopic sealed pipe and centre;

1 is valve body, the 2nd among the figure, nut cap, the 3rd, handwheel valve rod, the 4th, switch head, the 5th, T shape press seal plate, the 6th, telescopic sealed pipe, the 7th, broad edge, the 8th, crimping face, the 9th, bottom, the 10th, flexible ripple, the 11st, switch mouth.

Specific embodiment

At telescopic sealed pipe 6 of handwheel valve rod 3 switch heads, 4 covers of existing valve, broad edge 7 press seals of telescopic sealed pipe 6 get final product at the crimping face 8 of nut cap 2 and valve body 1.

At existing valve be: the opening that coupling nut lid 2 is arranged in the middle of the valve body 1, then valve body 1 middle opening position is bolted with nut cap 2, nut cap 2 centers are threaded with handwheel valve rod 3, handwheel valve rod 3 nut cap 2 centers rotations make handwheel valve rod 3 near or away from the switch mouth 11 in the valve body 1, be provided with switch mouth 11 in the fluid passage in the middle of the valve body 1 of nut cap 2 correspondences, switch mouth 11 planes are vertical with handwheel valve rod 3.

Make as Fig. 1,2 telescopic sealed pipe 6.Make model with the good elastic caoutchouc of stretchability, when rubber does not solidify in model, in the thickness with the telescopic sealed pipe of T shape press seal plate 5 pressure 6 bottoms 9, T shape press seal plate 5 is set in the rubber of bottom 9 thickness, and T shape press seal plate 5 can not rotate in the rubber of bottom 9 thickness.

Handwheel valve rod 3 switch heads 4 are enclosed within the middle of the telescopic sealed pipe 6, and with the intermediolateral column socket of T shape press seal plate 5, the socket that the intermediolateral column that switch head 4 is rotated can not drive T shape press seal plate 5 cooperates for appropriateness.Telescopic sealed pipe 6 is the spill sebific ducts that have only an end opening, and opening end has the broad edge 7 of broad, the crimping face 8 of broad edge 7 press seals at nut cap 2 and valve body 1, screws nut cap 2 and valve body 1, obtains the valve that telescopic stuffing box gland is arranged of the present utility model.

Claims

The valve that 1, telescopic stuffing box gland is arranged, comprise the nut cap (2) that is spirally connected on valve body (1), the valve body (1), nut cap (2) center is threaded with handwheel valve rod (3), it is characterized in that: the switch head (4) of handwheel valve rod (3) and T shape press seal plate (5) socket, T shape press seal plate (5) is fixed on the bottom (9) of telescopic sealed pipe (6) inner face; Telescopic sealed pipe (6) is the spill sebific duct that has only an end opening, opening end has broad edge (7), broad edge (7) press seal is at the crimping face (8) of nut cap (2) and valve body (1), and the switch head (4) of handwheel valve rod (3) is sealed in the telescopic sealed pipe (6).
2, the valve that telescopic stuffing box gland is arranged according to claim 1 is characterized in that: be provided with flexible ripple (10) between the broad edge (7) of telescopic sealed pipe (6) and bottom (9).