CN2209743Y - Bidirectional sealing rotary core valve - Google Patents

Abstract

The utility model relates to a universal valve which can be widely used for the petroleum industry, the chemical engineering industry, the water supply industry, the gas supply industry, the food product industry, etc. which deliver liquid through pipelines. In operation, the valve core upwards moves a short distance along the shaft line firstly to ensure that the valve clacks are disengaged from the sealing face of the valve body to eliminate the sealing pressure, and then, the valve core rotates for 90 DEG to make the valve in a complete open state. When the closing operation is carried out, the valve core reversely rotates for 90 DEG and downwards moves along the shaft line to tightly press two valve clacks on the valve body, and two sections are closed. The utility model overcomes the defects that the operation travel of a gate valve is long, the volume is large, and the weight is heavy; the loss of a pressure head of a stop valve is large; the sealing material of a ball valve doesn't resist high temperature, and a ball valve needs to work under the preset sealing pressure, etc.

Description

Bidirectional sealing rotary core valve

The present invention is a kind of universal valve, is applicable to the industry with line transportation liquid such as oil, chemical industry, water supply, air feed, food processing.

All kinds of universal valve that generally uses because of its structural reason, exists shortcoming and defect separately at present, and application area is greatly limited, and for example the gate valve volume is big, and operational stroke is long; Stop valve loss of pressure head is big, causes the energy consumption of carrying liquid to increase; Stopcock, ball valve etc. are limit and should not be used under high temperature condition because of sealing material, and can quicken to damage adding under the sealing load use in advance.

It is convenient to the purpose of this invention is to provide a kind of unlatching, and sealing surface does not have the novel universal valve of wearing and tearing.

The objective of the invention is to implement like this: the external force of opening/shutting valve at first affacts on the lining 8 by driving key 11, lining 8 is subjected to limited cover 12 restriction to pass to valve rod 10 by trapezoidal thread with rotating, and valve rod 10 has one " " at the middle part " shape groove and control pin 13 on being fixed on support 5 cooperate and can finish that parallel its axis moves and two continuous actions of 90 ° of rotations.Spool 3 is fused by minor axis 15 with valve rod 10, so do and valve rod 10 identical actions, the both sides of spool 3 cooperate with two flaps 2 respectively for the dovetail groove of band gradient, the other face of two flaps 2 all has seal ring tightly to cooperate with the sealing surface of valve body 1, therefore, spool 3 parallel its axis shift that at first makes progress during Open valve, sealing surface is disengaged, wait to be displaced to limit position and promptly do 90 ° of rotations, valve is opened fully, when closing, 90 ° of spool 3 counter-rotatings earlier again to bottom offset with sealing surface compact.The indicator board that is contained in valve rod 10 tops is clearly represented the residing state of valve.

Structure of the present invention is as shown in the figure: 1. valve body, 2. flap, 3. spool, 4. seal arrangement, 5 supports, 6 handwheels, 7. nut, 8. lining, 9. indicator board, 10. valve rod, 11. driving keys, 12. limited covers, 13. control pins, 14. connecting pins, 15. minor axises, 16. cover plates, 17. back-up rings, 18. pollutant exhaust holes.

Compare with the General valve of present use, the present invention has following characteristics: 1 opens and closes the operational stroke weak point; 2 fluids are straight-through, and loss of pressure head is little; 3 sealing surfaces can be with soft, hard two class material to be suitable for the various temperature condition; In 4 operating process, do 90 ° of rotations after sealing surface disengages, realize not having the friction working state; 5 close closed procedure divides two sections to finish, and relaxes the influence of water attack to pipeline and affiliated facility thereof.

Below in conjunction with accompanying drawing the utility model is described further: during Open valve, rotate counterclockwise handwheel 6 and by key 11 lining 8 is rotated, lining 8 cooperates with the left-handed trapezoidal thread of valve rod 10 employings and the restriction that is subjected to limited cover 12 can only rotate.The middle part of valve rod 10 have one be " " " shape right angle cotter way, the long 25～40mm of its " | " part and and parallel axes, "-" part is one section 90 ° a arc length, the smooth connection of two-part is slided freely within it to guarantee the control pin 13 that is fixed on the support.When lining 8 was delivered to rotation on the valve rod 10, the effect of valve rod 10 controlled cotters 13 can only be up along its axis.The lower end of valve rod 10 is enclosed within the outside of minor axis 15 upper ends and joins together with connecting pin 14, the lower end of minor axis 15 is processed to the rectangle platform, there is one section diameter to equal wide double-screw bolt on it, insert and on double-screw bolt, to screw back-up ring 17 again behind the rectangular opening on the spool 3 long limits that cooperate with it and weld, the rectangle platform cooperates with rectangular opening, broad gap is 0.5～1mm, and long gap is 4～6mm.Valve rod 10, minor axis 15, spool 3 constitutes a transmission system like this, spool 3 except do with valve rod 10 and minor axis 15 same movement, its axis also can have the translation of 2～3mm with respect to the transmission system medial axis.On the spool 3 both sides of opening all gradient be the dovetail groove of 1:12.5, cooperate with flap 2 respectively, when spool 3 along exercising two flaps 2 on the transmission system axis when axis draws in, the seal ring in flap 2 outsides just with valve body 1 on sealing surface break away from, until " " that rise on the valve rod 10 " corner of shape right angle cotter way and control pin 13 contact; and spool 3 rotates 90 ° thereupon; the trapezoidal through flow hole on it is promptly corresponding with the through flow hole on the valve body 1; valve is opened fully; simultaneously; indicator board 9 is with liquid stream and flows to parellel, demonstration valve place and open mode.Otherwise, when closing, clockwise rotate handwheel 6, by lining 8, valve rod 10, minor axis 15 drive 90 ° of spools 3 revolutions earlier make seal ring on two flaps 2 get back to valve body 1 on the sealing surface aligned position, along with handwheel 6 is rotated further, spool 3 moves downward, dovetail groove is pressed on the seal ring on the flap 2 on the sealing surface on the valve body 1 on it, spool 3 relative transmission system medial axis translations can be eliminated because the sealing load of two flaps 2 that a variety of causes causes is inconsistent, be independent of each other to guarantee them independently to finish sealing, close like this and finish, indicator board 9 is with liquid stream and flows to vertical configuration, shows that valve is in closed condition.

Claims (6)

1, a kind of two way sealed of universal class is changeed core valve, it is characterized in that handwheel (6), driving key (11), lining (8), valve rod (10), minor axis (15), spool (3) composition transmission system, the seal ring of this system controlled on limited cover (12) and control pin (13) make two flaps (2) disengages with valve body during in motion, and the indicator board (9) that valve rod (10) top is fixed is intuitively indicated opening of valve or closed state.

2, change core valve according to claim 1 described two way sealed, it is characterized in that handwheel (6) is connected with lining (8) by driving key (11), and fasten as one with nut (7).

3, change core valve according to claim 1 described two way sealed, it is characterized in that the endoporus of lining (8) has the left-handed trapezoidal thread of perforation, the bottom of outside has a boss to cooperate with limited cover (12), and it can only be rotated; A fine thread and a keyway are arranged at the top of lining (8) outside.

4, change core valve according to claim 1 described two way sealed, it is characterized in that the left-handed trapezoidal thread of the top section of having of valve rod (10) cooperates with lining (8); The middle part have on the polished rod one be " " " shape right angle cotter way, the long 25～40mm of its " | " part and and parallel axes, "-" part is 90 ° of a segment lengths' a arc length, the smooth connection of two-part; The top is the cylinder that the plane is processed in the side.

5, change core valve according to claim 1 described two way sealed, it is characterized in that spool (3) is trapezoidal and has trapezoidal through flow hole, the through flow hole both sides have dovetail groove, and the gradient of two grooves is 1:12.5; There is a rectangular through-hole that is connected with minor axis (15) trapezoidal center, long limit, and the long limit in this hole is corresponding with the long limit and the minor face at its position of living in respectively with minor face.

6, change core valve according to claim 1 described two way sealed, it is characterized in that the lower end of transmission shaft (10) is enclosed within the outside of minor axis (15) upper end, by connecting pin (14) the two is fused again, the lower end of minor axis (15) is processed to the rectangle platform, broad gap 0.5～1mm behind the rectangular opening on insertion spool 3 long limits, long gap 4～6mm; There is one section diameter to equal wide double-screw bolt on the rectangle platform, welds again after back-up ring (17) screws on it.

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