CN2651539Y

CN2651539Y - Rolling ball valves

Info

Publication number: CN2651539Y
Application number: CN 03238359
Authority: CN
Inventors: 蔺荣春; 苏金源
Original assignee: SANGAO WEIDUOLI VALVE CO Ltd XIAMEN
Current assignee: SANGAO WEIDUOLI VALVE CO Ltd XIAMEN
Priority date: 2003-09-19
Filing date: 2003-09-19
Publication date: 2004-10-27
Anticipated expiration: 2013-09-19

Abstract

The utility model discloses a rolling ball valve which comprises a hand wheel, a valve rod, a valve cover, a valve body, a guide pin, a hinge rod, a ball clack and a ball body support. Wherein the valve body is provided with a fluid inlet channel and a fluid outlet channel which are arranged along the central line of a valve base, and the ball clack is arranged on the central line of the valve base and closely jointed with the inner end openings of the fluid inlet and outlet channels; the ball clack is two symmetrically arranged ball clacks, and the upper end and the lower end of the ball clack are respectively movably connected with the lower end of the valve rod and the upper end of the ball body support through the hinge rod. The utility model realizes the telescopic and rotary motion of two ball clacks through the combination between a spiral groove of the hinge rod and the valve rod and the guide pin, has the advantages of that the friction between the ball clack and the valve base is zero and the unit sealing load can be adjusted, and thereby prolongs the service life of the ball valve.

Description

The rolling type ball valve

Technical field

The utility model relates to a kind of ball-valve structure, particularly relates to a kind of rolling type ball valve.

Background technique

Existing ball valve generally comprises valve seat, the spool in valve body and the valve body, it is spherical that spool roughly is, drive valve seat rotation relatively by valve rod, when the through hole on the spool relative with the import and export of valve body when straight, valve just is in open mode, otherwise spool just cuts off the import and export of valve seat, and valve then is in closed condition.The spool of this ball valve and the motive sealing between the valve seat seal by existing certain specific pressure (power that is subjected on the unit area) between the two, this specific pressure produces when ball valve is tightened valve gap between erecting stage, when just having assembled, ball valve finishes and when being in closed condition, specific pressure value between the two is a maximum value, in use this specific pressure value (referring under the complete shut-down state) only can reduce later on, can not increase, the specific pressure value of this ball valve is uncontrollable, in the using process of ball valve, often occur biting, stuck, industry Frequently Asked Questions such as scuffing make that the working life of this ball valve is shorter.

Summary of the invention

The purpose of this utility model is to provide that a kind of seal pressure is adjustable, the friction of ball clack and valve seat is zero rolling type ball valve.

For achieving the above object, solution of the present utility model is:

The utility model is a kind of rolling type ball valve, and it is mainly supported by handwheel, valve rod, valve gap, valve body, guide finger, hinge-rod, ball clack and spheroid and forms.Described valve body has a fluid that laterally runs through valve body into and out of passage, described ball clack be arranged at this valve seat be arranged at this body cavity and can with fluid into and out of the airtight applying of passage inner port; The upper end of ball clack is movably connected in the lower end of valve rod by a hinge-rod, and the lower end of ball clack is movably articulated in the upper end that spheroid supports, the rotating insertion body cavity bottom, lower end that spheroid supports; Described valve bonnet seal is fixed in the upper end of valve body; Described valve rod is rotating to pass valve gap and handwheel is affixed, is provided with a spiral chute along oblique downward extension on the circumferential surface on valve rod top, and this spiral chute is slidingly matched with the end that laterally penetrates the guide finger of valve gap.

Described ball clack is along symmetrically arranged two ball clacks of valve rod axis.

The utility model also comprises the valve seat of a left and right symmetric arrangement, and this left and right valve seat is arranged at valve body fluid the inner into and out of passage respectively, and described ball clack is airtight to be fitted on the inner port of left and right valve seat.

The utility model also comprises Gland and guide sleeve, this Gland and guide sleeve are set on the valve gap from both direction up and down respectively, between Gland lower end surface and guide sleeve upper-end surface, filler is housed, the rotating center hole that passes described Gland and guide sleeve of valve rod.

Described hinge-rod is made of first connecting rod, second connecting rod; One end of described first connecting rod, second connecting rod is movably articulated in the valve rod lower end, and first connecting rod, the second connecting rod the other end are movably articulated on the ball clack.

Described valve gap is made of sealing cover and the loam cake that is fixed in the sealing cover upper-end surface; Sealing cover is airtight affixed by gasket seal and valve body; The loam cake gap is socketed on the valve rod and with Gland contains.

The utility model also comprises a connection set, and this connection set is to be made of connecting sleeve, thrust-bearing and bearing gland; Described connecting sleeve and valve rod top are affixed, and connecting sleeve is by the rotating upper-end surface that is crimped on the loam cake of valve gap of thrust-bearing, and bearing gland contains connecting sleeve, thrust-bearing.

The utility model utilize hinge-rod, and valve rod on spiral chute stretch and rotatablely move with realizing two ball clacks cooperating of guide finger, thereby have the following advantages:

The friction of (1) two ball clack and valve seat is zero.During valve opening of the present utility model, two ball clacks shrink along valve seat (valve body) centerline direction lifts off a seat, and makes two ball clacks not contact with valve seat, thereby has prolonged the working life of ball valve.

(2) seal pressure is adjustable.Two ball clacks of the present utility model compress valve seat and produce the desired seal specific pressure under the effect of hinge-rod, so seal pressure can be adjusted with fluid erosion wearing and tearing, extent of corrosion and change of pressure, be applicable to high temperature, high pressure operating mode.

(3) simple in structure, the good manufacturability of model utility have guaranteed that valve hangs down the reliability of torque operation and use.

(4) model utility only is provided with spiral chute on valve rod, because this spiral chute is positioned at top, impurity is difficult for entering spiral chute and blocks the slip of guide finger in spiral chute, makes that the structure action is more reliable.

Below in conjunction with the drawings and specific embodiments the utility model is further described.

Description of drawings

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

Fig. 2 is the stereogram of parts such as the utility model ball clack.

Embodiment

As shown in Figure 1, the utility model is a kind of rolling type ball valve, and it mainly is made up of handwheel 1, connection set 2, valve rod 3, valve gap 4, valve body 5, guide finger 6, hinge-rod 7, ball clack 8, valve seat 9, Gland 10, guide sleeve 20, spheroid support 30 and gasket seal 40.

Described valve body 5 has one and laterally runs through the fluid of valve body into and out of

passage

51,52, described valve seat 9 comprises the

valve seat

91,92 of a pair of left and right symmetric arrangement, this left and right valve seat is arranged at valve body 5 fluids the inner into and out of

passage

51,52 respectively, described ball clack 8 is along symmetrically arranged two

ball clacks

81,82 of valve rod 3 axis, two

ball clacks

81,82 are arranged in the valve body 5 and between valve seat 9, it can airtightly be fitted on the inner port of left and

right valve seat

91,92.

Described hinge-rod 7 is made of first connecting rod 71, second connecting rod 72; One end of described first connecting rod 71, second connecting rod 72 is movably articulated in valve rod 3 lower ends, and first connecting rod 71, second connecting rod 72 the other ends are movably articulated on the ball clack 8.The lower end of ball clack 8 is movably articulated in spheroid by bearing pin 60 and supports 30 upper end, the bottom of spheroid support 30 is a cylindrical body 301, the through hole 53 of these cylindrical body 301 rotating insertion valve bodies 5 inner chamber bottoms, the other end shutoff one of this through hole 53 seal silently 70.

Described valve gap 4 is made of sealing cover 42 and the loam cake 41 that is fixed in sealing cover 42 upper-end surfaces; Sealing cover 42 is airtight affixed by gasket seal 40 and valve body 5, and loam cake 42 gaps are socketed on the valve rod 3 and with Gland 10 contains.

Described Gland 10 and guide sleeve 20 are set on the sealing cover 42 of valve gap 4 from both direction up and down respectively, between Gland 10 lower end surfaces and guide sleeve 20 upper-end surfaces, the filler 50 that is used to seal is housed, valve rod 3 is rotating, and to pass the center hole and the handwheel 1 of described Gland 10 and guide sleeve 20 affixed, on the circumferential surface on the top of valve rod 3, be provided with a spiral chute 31 along oblique downward extension, this spiral chute 31 is slidingly matched with the end that laterally penetrates the guide finger 6 of valve gap 4, makes when valve rod 3 rotates along on this spiral chute 31, move (as shown in Figure 2) down.

Described connection set 2 is made of connecting sleeve 21, thrust-bearing 22 and bearing gland 23.Described connecting sleeve 21 is affixed with valve rod 3 tops, and connecting sleeve 21 is by the thrust-bearing 22 rotating upper-end surfaces that are crimped on valve gap 4 loam cakes 41, and bearing gland 23 contains connecting sleeve 21, thrust-bearing 22.

Working principle of the present utility model (as shown in Figure 1 and Figure 2):

The utility model utilize hinge-rod 7, and valve rod 3 on spiral chute 31 cooperate and realize that two ball clacks 10 are flexible and rotatablely move.During valve opening, two ball clacks 8 are under the effect of spiral chute 31 on hinge-rod 7, the valve rod 3, shrink in the mode of rolling along valve seat 9 (valve body 5) centerline direction and to lift off a seat 9, fluid in the pipeline has evenly reduced the local scour corrosion of high-velocity fluid to valve seat 9 by valve along spherome surface, and last two ball clacks 8 turn to fully open position.During valve closing, two ball clacks 8 are under the synergy of spiral chute 31 and spheroid support 30 on hinge-rod 7, the valve rod 3, and valve seat 9 is moved and compressed to rotation in the mode of rolling to valve seat 9 simultaneously, and it is more reliable than means of press seals to produce desired seal.Its seal pressure can prolong the working life of ball valve with fluid erosion wearing and tearing, extent of corrosion and change of pressure adjustment.

Claims

1, a kind of rolling type ball valve is characterized in that: it is mainly supported by handwheel, valve rod, valve gap, valve body, guide finger, hinge-rod, ball clack and spheroid and forms; Described valve body has a fluid that laterally runs through valve body into and out of passage, described ball clack be arranged at this body cavity and can with fluid into and out of the airtight applying of passage inner port; The upper end of ball clack is movably connected in the lower end of valve rod by a hinge-rod, and the lower end of ball clack is movably articulated in the upper end that spheroid supports, the rotating insertion body cavity bottom, lower end that spheroid supports; Described valve bonnet seal is fixed in the upper end of valve body; Described valve rod is rotating to pass valve gap and handwheel is affixed, is provided with a spiral chute along oblique downward extension on the circumferential surface on valve rod top, and this spiral chute is slidingly matched with the end that laterally penetrates the guide finger of valve gap.

2, rolling type ball valve according to claim 1 is characterized in that: described ball clack is along symmetrically arranged two ball clacks of valve rod axis.

3, rolling type ball valve according to claim 1, it is characterized in that: it also comprises the valve seat of a left and right symmetric arrangement, this left and right valve seat is arranged at valve body fluid the inner into and out of passage respectively, and described ball clack is airtight to be fitted on the inner port of left and right valve seat.

4, rolling type ball valve according to claim 1, it is characterized in that: it also comprises Gland and guide sleeve, this Gland and guide sleeve are set on the valve gap from both direction up and down respectively, between Gland lower end surface and guide sleeve upper-end surface, filler is housed, the rotating center hole that passes described Gland and guide sleeve of valve rod.

5, rolling type ball valve according to claim 1, it is characterized in that: described hinge-rod is made of first connecting rod, second connecting rod; One end of described first connecting rod, second connecting rod is movably articulated in the valve rod lower end, and first connecting rod, the second connecting rod the other end are movably articulated on the ball clack.

6, rolling type ball valve according to claim 1 is characterized in that: described valve gap is made of sealing cover and the loam cake that is fixed in the sealing cover upper-end surface; Sealing cover is airtight affixed by gasket seal and valve body; The loam cake gap is socketed on the valve rod and with Gland contains.

7, rolling type ball valve according to claim 1, it is characterized in that: it also comprises a connection set, this connection set is to be made of connecting sleeve, thrust-bearing and bearing gland; Described connecting sleeve and valve rod top are affixed, and connecting sleeve is by the rotating upper-end surface that is crimped on the loam cake of valve gap of thrust-bearing, and bearing gland contains connecting sleeve, thrust-bearing.