CN201627948U - High-temperature high-pressure flat-plate gate valve - Google Patents

Abstract

A high-temperature high-pressure flat-plate gate valve comprises a valve body, a valve cover and a valve stem. The lower end of the valve stem is connected with a wedge disc frame with a flow hole, a T-shaped groove is disposed at the top of the wedge disc frame, the valve stem is connected with the wedge disc frame through the T-shaped groove, the wedge disc frame is provided with a wedge disc mounting hole with the direction identical to the axial direction of the flow hole above the flow hole, a left wedge disc and a right wedge disc are oppositely mounted on two sides of the wedge disc mounting hole and are oppositely sleeved at the wedge disc mounting hole, a spring cavity is arranged between the left wedge disc and the right wedge disc, a pre-tightening spring is arranged inside the spring cavity, two ends of the pre-tightening spring are abutted against inner sides of the left wedge disc and the right wedge disc, and wedge disc sealing surfaces matching with sealing surfaces of the valve body are arranged on outer surfaces of the left wedge disc and the right wedge disc. By aid of the above specific design, the gate valve has a stronger compensating function, is reliable in sealing, can realize zero leakage when in high pressure and low pressure, and is long in service life.

Description

The High Temperature High Pressure plate valve

Technical field

The utility model relates to a kind of plate valve, is particularly useful for the plate valve of High Temperature High Pressure.

Background technique

Gate valve is present most widely used valve products, be used for the transmission of control media in fields such as oil, chemical industry, metallurgy, electric power, light industry pharmacy, have advantages such as negotiability is strong, flow resistance is little, the self-locking antivibration is good, high temperature resistant, high pressure, plate valve is because the sealing surface frequent friction in use of flashboard and valve body, easy to wear, occur leakage problem easily, limited the working life of valve.And because flashboard and valve body guiding rib have big gap, under the effect of medium, flashboard can rock, and causes collision and damage between valve body and flashboard sealing surface.These have all influenced the working life of valve, but also may cause the not tight drawback of valve seal.

Summary of the invention

Technical problem to be solved in the utility model provides a kind of High Temperature High Pressure plate valve that has wear automatic-compensation function, good airproof performance and long service life.

For solving the problems of the technologies described above, the utility model is by the following technical solutions: a kind of High Temperature High Pressure plate valve, comprise valve body, valve gap, valve rod, be connected with the flashboard frame of band discharge orifice in the lower end of valve rod, the top of flashboard frame is provided with T-slot, valve rod is connected with the flashboard frame by T-slot, the flashboard frame is provided with the flashboard mounting hole identical with the discharge orifice axial direction above discharge orifice, the both sides of flashboard mounting hole are equipped with left flashboard and right flashboard in opposite directions, and left flashboard and right flashboard are socketed on flashboard mounting hole place in opposite directions; Be provided with spring chamber between described left flashboard and the right flashboard, be provided with preloading spring in the spring chamber, the preloading spring two ends peak at the inboard of left flashboard and right flashboard, the flashboard sealing surface that the valve body sealing surface that the outside of left flashboard and right flashboard is provided with valve body is provided with matches.

The utility model is by above-mentioned specific design, and because of being provided with preloading spring between two flashboards, preloading spring struts two flashboards under the sealing state, makes the flashboard sealing surface still can keep tight the contact with the valve body sealing surface that valve body cooperates.And make gate valve have stronger compensate function, if sealing surface wear, flashboard from the translation of trend both sides, make valve body sealing surface still can keep tight the contact with the flashboard sealing surface, so valve seal is reliable, all can realize zero leakage during high low pressure under the effect of spring.The gate valve life-span is long.

The utility model is described in further detail below in conjunction with the drawings and specific embodiments.

Description of drawings

Fig. 1 is a kind of embodiment's of the utility model High Temperature High Pressure plate valve a structural representation.

Fig. 2 is the cooperating structure schematic representation of flashboard frame and flashboard.

Fig. 3 is the left view of Fig. 2.

Embodiment

As Fig. 1, Fig. 2, shown in Figure 3, a kind of embodiment of the utility model High Temperature High Pressure plate valve comprises valve body 1,valve gap 7,valve rod 10, is connected with theflashboard frame 2 ofband discharge orifice 11 in the lower end ofvalve rod 10, the top offlashboard frame 2 is provided with T-slot 12, andvalve rod 10 is connected withflashboard frame 2 by T-slot 12.Be provided with the flashboard mounting hole identical withdischarge orifice 11 axial directions onflashboard frame 2, the flashboard mounting hole site is in the top of discharge orifice 11.The both sides of flashboard mounting hole are equipped withleft flashboard 5 andright flashboard 3 in opposite directions, and the inboard ofleft flashboard 5 has left sleeve 5a, and the inboard ofright flashboard 3 hasright sleeve 3a, and left sleeve 5a andright sleeve 3a are socketed on flashboard mounting hole place in opposite directions.The internal diameter of present embodiment left sleeve 5a is slightly larger than the external diameter ofright sleeve 3a, and left sleeve 5a andright sleeve 3a socket-connect with the flashboard mounting hole after the socket in opposite directions again and cooperate, and this design can be shortened the axial thickness of flashboard frame 2.Described left sleeve 5a,right sleeve 3a have formed a spring chamber in the inboard of flashboard mounting hole center andleft flashboard 5 and right flashboard 3.Be provided with preloadingspring 4 in the spring chamber, preloadingspring 4 two ends peak at the inboard ofleft flashboard 5,right flashboard 3, theflashboard sealing surface 13 of the outside ofleft flashboard 5 andright flashboard 3 for cooperating with the valve body sealing surface that has on the valve body 1.

The utility model High Temperature High Pressure plate valve drives Stem Mut 8 rotations byhandwheel 7,10 motions of Stem Mut 8 actuate valve stem, andvalve rod 10 is connected withflashboard frame 2 byT type groove 12, guarantees thatflashboard 3 moves up and down, and plays on-off action.Present embodiment also is that indicatingarm 12 has been set up, the scale marker valve switch degree above it inhandwheel 7valve rods 10 positions at the valve switch place.

The utility model is because of being provided with preloadingspring 4 between two flashboards, preloadingspring 4 struts two flashboards under the sealing state, makeflashboard sealing surface 13 still can keep tight the contact, under the effect of preloadingspring 4 thrusts, produce the initial sealing specific pressure, help the sealing of sealing pair with valve body sealing surface.Under the pressure medium effect, the outlet end sealing pair produces enough seal pressures and makes the outlet end sealing.When the working pressure of valve hangs down, in preloadingspring 4 effect lower inlet ends sealings; Entrance point is if any leakage when pressure is higher, and outlet end is in self-pressure-sealed state, makes valve have the double seal function, has effectively guaranteed the sealing of valve.

The design of preloadingspring 4 also makes gate valve have stronger compensate function, if sealing surface wear, flashboard under the effect of preloadingspring 4 from the translation of trend both sides, makeflashboard sealing surface 13 still can keep tight the contact with valve body sealing surface, therefore valve seal is reliable, all can realize zero leakage during high low pressure.And because the pretightening force that preloadingspring 4 provides makes the valve body sealing surface of valve closely contact with the flashboard sealing surface, and two sealing surface contact forces are little, it is also little to wear and tear, and also greatly reduces the heel and toe wear of valve sealing face.

Claims (2)

1. High Temperature High Pressure plate valve, comprise valve body, valve gap, valve rod, it is characterized in that: the flashboard frame that is connected with the band discharge orifice in the lower end of valve rod, the top of flashboard frame is provided with T-slot, valve rod is connected with the flashboard frame by T-slot, the flashboard frame is provided with the flashboard mounting hole identical with the discharge orifice axial direction above discharge orifice, the both sides of flashboard mounting hole are equipped with left flashboard and right flashboard in opposite directions, and left flashboard and right flashboard are socketed on flashboard mounting hole place in opposite directions; Be provided with spring chamber between described left flashboard and the right flashboard, be provided with preloading spring in the spring chamber, the preloading spring two ends peak at the inboard of left flashboard and right flashboard, the flashboard sealing surface that the valve body sealing surface that the outside of left flashboard and right flashboard is provided with valve body is provided with matches.

2. High Temperature High Pressure plate valve according to claim 1, it is characterized in that: the inboard of described left flashboard has left sleeve, the inboard of right flashboard has right sleeve, the internal diameter of left sleeve is greater than the external diameter of right sleeve, and left sleeve and right sleeve socket-connect with the flashboard mounting hole after the socket in opposite directions again and cooperate.

Images