CN201714993U

CN201714993U - Improved bell-type ash-discharging valve

Info

Publication number: CN201714993U
Application number: CN2010202677714U
Authority: CN
Inventors: 刘会良; 杨艳巧; 康璐
Original assignee: SHIJIAZHUANG CHANGHONG VALVE CO Ltd
Current assignee: SHIJIAZHUANG CHANGHONG VALVE CO Ltd
Priority date: 2009-12-31
Filing date: 2010-07-13
Publication date: 2011-01-19
Anticipated expiration: 2020-07-13

Abstract

The utility model provides an improved bell-type ash-discharging valve, belonging to the technology field of valve technology, the technology problem to be solved is to provide a bell-type ash discharging valve characterized by self-locking function during the cylinder driving, reliable closeness and good sealing, the technical scheme of the bell-type ash-discharging valve is: the valve comprises a base, a valve body, a hanging bell, a cylinder, a valve rod, a cylinder connecting rod, and a valve rod connecting rod, a connecting rod curve chute is symmetrically installed at the two sides of the valve body, the central section of the cylinder connecting rod is fixedly provided with a sliding shaft, the axis of the sliding shaft is perpendicular to the cylinder connecting rod plane, the two ends of the sliding shaft are inlaid in the connecting rod curve chute; the valve body is also provided with a limit block, the end portion of the limit block is corresponding to the height of the sliding shaft; the sealing is a double-layer sealing structure. The improved bell-type ash-discharging valve has advantages in that:: the cylinder pushes the cylinder connecting rod to move along the connecting rod curve chute, until the cylinder connecting rod reaches the closing position of the valve, the pushing direction of the cylinder overlaps with the center of the valve rod, becoming the propulsion dead center, forming the self-locking, and guaranteeing the reliability of the closeness, the double-layer sealing structure also makes the closeness and sealing more reliable.

Description

A kind of improved clock-type unloading valve

Technical field

The utility model relates to the valve that uses in the pipelines such as a kind of pulverized coal conveying, dust, belongs to valve technology field.

Background technique

The clock-type unloading valve is a metallurgy industry pipeline valve commonly used, is usually used in the coal spraying pipeline, is specifically designed to coal dust and carries, and also is applied to the steelmaking furnace cleaning shaft, also can be used for ash discharge or material loading in other industrial pipeline system.Clock-type unloading valve at present commonly used adopts the cylinder way of propelling to carry out opening and closing, but does not have auto-lock function during air cylinder driven, and when bleed pressure produced fluctuation, the thrust of cylinder also can change thereupon, influences the reliability of valve closing.Simultaneously, valve be sealed into simple hard sealing structure, seal pressure was little when cylinder was closed, and had also influenced the effect that two kinds of media of gas-solid are sealed.

Summary of the invention

Technical problem to be solved in the utility model has auto-lock function when providing a kind of air cylinder driven, closes the clock-type unloading valve of reliable and good seal.

The technological scheme that solves the problems of the technologies described above is:

A kind of improved clock-type unloading valve, it by base, valve body, hang clock, cylinder, valve rod, air cylinder connecting rod, valve rod connecting rod and form, its improvements are, be symmetrically installed with the coupler curve chute on the valve body both sides, the air cylinder connecting rod middle part is fixed with sliding axle, the sliding axle axis is vertical with the air cylinder connecting rod plane, and the two ends of sliding axle are embedded in the coupler curve chute, and the width of the external diameter of sliding axle and coupler curve chute is complementary.

Above-mentioned improved clock-type unloading valve also is equipped with limiting stopper on valve body, the position of limiting stopper is in the outside of coupler curve chute near valve rod one end, and the end of limiting stopper is corresponding with the height of sliding axle.

Above-mentioned improved clock-type unloading valve, it be sealed into double-layer sealing structure, first order sealing be valve seat with hang that built-up welding has the cemented carbide sealing layer on the clock surface of contact, second level sealing is an elastic seal ring, elastic seal ring is positioned at valve seat and the top of hanging the clock surface of contact, is pressed on the cemented carbide sealing layer that hangs clock.

Adopt the improved clock-type unloading valve of this structure, cylinder promotes air cylinder connecting rod and moves along the coupler curve chute, make when arriving the valve closing position, the direction of propulsion of cylinder overlaps with the center of valve rod, become and advance the dead point, form self-locking, guaranteed that the reliability of closing, double-layer sealing structure make that also to close sealing more reliable.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the plan view of Fig. 1;

Fig. 3 is that the K of Fig. 2 is to view;

Fig. 4-Fig. 7 is the continuous schematic representation of pass of the present utility model closed procedure.

Mark is as follows among the figure: base 1, valve body 2, valve seat 3, hang clock 4, cylinder 5, valve rod 6, air cylinder connecting rod 7, valve rod connecting rod 8, coupler curve chute 9, sliding axle 10, limiting stopper 11, elastic seal ring 12, rocking arm 13, bearing pin 14.

Embodiment

Show among the figure, the utility model by base 1, valve body 2, hang clock 4, cylinder 5, valve rod 6, air cylinder connecting rod 7, valve rod connecting rod 8 and form.When valve need close or open, cylinder 5 promotes air cylinder connecting rod 7 by piston rod and moves, air cylinder connecting rod 7 drives 8 swings of valve rod connecting rod, valve rod connecting rod 8 is connected with valve rod 6, rotate thereby drive valve rod 6, valve rod 6 is rotating rocking arm 13, and rocking arm 13 is sling or put down and hang clock 4, it is closed or leave to hang clock 4 circumference and valve seat 3, and unloading valve is closed or opened.

Improvements of the present utility model are, be symmetrically installed with coupler curve chute 9 on valve body 2 both sides, air cylinder connecting rod 7 middle parts are fixed with sliding axle 10, sliding axle 10 is vertical with air cylinder connecting rod 7, the two ends of sliding axle 10 are embedded in coupler curve chute interior 9, can slide along coupler curve chute 9, thereby air cylinder connecting rod 7 is moved along the curve of coupler curve chute 9.When cylinder 4 promoted said mechanism and arrives the valve closing positions, the direction of propulsion of cylinder 4 overlapped with the center of valve rod 6, and cylinder connects 7, curvilinear groove 9, virtual center O forms straight line becomes the propelling dead point, and the formation self-locking has guaranteed the reliability of closing.When needing to open, move behind the air cylinder connecting rod 7, sliding axle 10 moves in chute backward, drives valve rod connecting rod 8 by bearing pin 14 and rotates counterclockwise, and hangs clock 4 thereby valve rod 6 drive rocking arms 13 are put down, and realizes the unlatching of valve.Fig. 4-Fig. 7 is the continuous schematic representation of pass of the present utility model closed procedure, and Fig. 4 is that valve is opened 50 ° fully, and Fig. 5 is a valve closing to 28.71 °, and Fig. 6 is a valve closing to 18.5 °, and Fig. 7 is that valve is in the closed position, and opening process is with to close closed procedure opposite.As can see from Figure 7, air cylinder connecting rod 7 and coupler curve groove 9 virtual center O (relevant force A, O, B; C, O, D) and valve rod 6 pendulum be in line and be in (beeline) dead center position, reach the purpose of self-locking.

Seal arrangement to valve when preventing that hanging clock 4 slings causes excess impact and damages seal arrangement, limiting stopper 11 also is installed on valve body 2, the position of limiting stopper 11 is in the outside of coupler curve chute 9 near valve rod 6 one ends, the end of limiting stopper 11 is corresponding with the height of sliding axle 10, can block sliding axle 10 reaches.

For make close with sealing effect better, seal arrangement of the present utility model is a double-layer sealing structure, valve seat 3 with hang that built-up welding has the cemented carbide sealing layer on clock 4 surface of contact, in case sealing surface is washed away by medium, adopt elastic seal ring 12 and the cemented carbide sealing layer that hangs clock 4 to compress sealing again, and seal ring leave certain decrement, make valve soft seal and the effective combination of hard sealing, reach zero and reveal, thus the working life of increase valve, and elastic seal ring 12 can be made by materials such as silicone rubber.

Claims

1. improved clock-type unloading valve, it is characterized in that: it by base [1], valve body [2], hang clock [4], cylinder [5], valve rod [6], air cylinder connecting rod [7], valve rod connecting rod [8] and form, its improvements are, be symmetrically installed with coupler curve chute [9] on valve body [2] both sides, air cylinder connecting rod [7] middle part is fixed with sliding axle [10], sliding axle [10] axis is vertical with air cylinder connecting rod [7] plane, the two ends of sliding axle [10] are embedded in the coupler curve chute [9], and the width of the external diameter of sliding axle [10] and coupler curve chute [9] is complementary.

2. improved clock-type unloading valve according to claim 1, it is characterized in that: limiting stopper [11] also is installed on valve body [2], the position of limiting stopper [11] is in the outside of coupler curve chute [9] near valve rod [6] one ends, and the end of limiting stopper [11] is corresponding with the height of sliding axle [10].

3. improved clock-type unloading valve according to claim 2, it is characterized in that: it be sealed into double-layer sealing structure, first order sealing be valve seat [3] with hang that built-up welding has the cemented carbide sealing layer on clock [4] surface of contact, second level sealing is elastic seal ring [7], elastic seal ring [7] is positioned at valve seat [3] and the top of hanging clock [4] surface of contact, is pressed on the cemented carbide sealing layer that hangs clock [4].