CN207989748U - A kind of shut-off valve - Google Patents

Abstract

The utility model proposes a kind of shut-off valves,Including valve body,Valve chamber,Valve deck,Valve seat,Flap and valve rod,The valve seat is fixed by welding with valve body,The flap is equipped with the first groove coordinated with valve stem end,The opening of first groove is equipped with for the valve clack cover to valve stem spacing,The valve clack cover is connected through a screw thread with the first groove,It is located at the first groove both sides at the top of the flap and is equipped with the first passage being connected with the first groove,The flap bottom is equipped with the second channel being connected with the first groove,The second channel is located at the end in flap and forms sealing surface with valve rod end face,Decompressor is equipped in the second channel,The decompressor includes the second groove for being located at second channel both sides,The baffle being located in the second groove and the spring being located between baffle and the second groove,Second channel is divide into upper part and lower part by the baffle,The bushing being adapted to valve rod is equipped in the valve deck.

Description

A kind of shut-off valve

Technical field

The utility model is related to valve fields, and in particular to a kind of shut-off valve.

Background technology

Shut-off valve is also pipe valve, is a kind of most popular valve, and why very popular it is, is due to being opened and closed Frictional force is small between sealing surface in journey, relatively durable, and Lift is little, and manufacture is easy, easy to maintenance, low in being applicable not only to Pressure, and it is suitable for high pressure.The closure principle of shut-off valve is, by valve stem pressure, to keep valve clack sealing surface tight with sealing surface of seat Closely connected conjunction prevents flow of media.Valve plays the medium in the pipeline where it important function of cut-out and throttling, shut-off valve As it is a kind of it is extremely important block class valve, sealing is by applying torque to valve rod, and valve rod is in the axial direction to valve Valve applies pressure, and valve clack sealing surface is made to be fitted closely with sealing surface of seat, prevents slot leakage of the medium between sealing surface.

Existing shut-off valve includes valve body, the valve deck being connected with valve body, valve chamber, the valve seat being located in valve chamber, matches with valve seat The valve rod for closing the flap of sealing and being connected with flap, the valve rod are used for the keying of control valve.Existing shut-off valve is low When under temperature state, the medium in medium and valve deck in valve chamber can carry out convection current and heat exchange, generate vapor, be easy in this way Lead to the filler being mounted in valve deck bonding, hardening and leakage, so that filler loses sealing function, causes outside medium It lets out.

Utility model content

Based on the above issues, the utility model aim be to provide it is a kind of it is simple in structure, convenient for adjusting, good airproof performance and energy Enough adapt to the shut-off valve of ultra-low temperature surroundings.

In view of the above problems, providing following technical solution：A kind of shut-off valve, including valve body, valve chamber, valve deck, valve seat, valve Valve and valve rod, the valve seat are fixed by welding with valve body, and the flap is equipped with the first groove coordinated with valve stem end, The opening of first groove is equipped with for the valve clack cover to valve stem spacing, and the valve clack cover is connected with the first groove by screw thread It connects, the first groove both sides is located at the top of the flap and are equipped with the first passage being connected with the first groove, the flap bottom is set There are the second channel being connected with the first groove, the second channel to be located at the end in flap and form sealing with valve rod end face Face, the second channel is interior to be equipped with decompressor, and the decompressor includes the second groove for being located at second channel both sides, is located at Second channel is divided into up and down two by baffle in the second groove and the spring being located between baffle and the second groove, the baffle Part, the valve deck is interior to be equipped with the bushing being adapted to valve rod.

In above structure, valve seat can increase the leakproofness between valve seat and valve body by being fixedly welded in valve body, Enable to valve base sealing is more stable to be not easy to shake and generate displacement.Valve clack cover is matched with flap and is limited valve stem end Position, and it is more secured to enable to valve rod to be connect with flap.Certain gap is equipped between the valve stem end and valve clack cover bottom, When valve needs to open, valve rod rises, and a part of medium can be flowed into the first groove by second channel, then be passed through First passage flows out, then flows to valve export, so as to reduce the scouring force that flap receives medium, avoids the quick of flap It wears and causes flap that can not form sealing between valve seat, to increase the service life of flap.When valve rod rises to When certain altitude, by the limit of valve clack cover, drives flap to rise to together and fully open valve.The valve rod and second channel Fitted seal can also adjust the flow of medium as needed, with suitable for different environment.Decompressor can reduce medium Pressure reduces medium and is washed away to valve clack sealing surface, to increase the service life of flap.The pressure of medium squeezes baffle To the second groove, the effect for reducing pressure is realized.Spring enables to baffle to reset, and also can further reduce medium Scouring force.Bushing can prevent medium from flowing into Fa Gainei, so as to avoid medium in valve deck filler bonding, harden and let out Dew, prevents medium from being leaked out from valve deck, increases the leakproofness of valve.

The utility model is further arranged to, and the outer circle wall of the valve clack cover is equipped with bulge loop, the bulge loop and flap By being welded to connect.

Using the above structure, the valve clack cover that can be is securely fixed on flap, increases stability.

The utility model is further arranged to, and it is in the circular arc being bent upwards that the baffle, which is located at the end in second channel, Shape.

Using the above structure, the scouring force of medium can be drawn upwards, and enables to baffle that can be extruded into second In groove, fractureed by medium so as to avoid baffle.

The utility model is further arranged to, and the valve deck inner wall is equipped with water accepting layer, and the water entry is on bushing Side.

Using the above structure, water accepting layer uses absorbing resin material, when can prevent valve for low temperature, Jie in valve chamber Medium in matter and valve deck can carry out convection current and heat exchange, generate vapor and influence the leakproofness of filler.

The beneficial effects of the utility model：Compared to existing shut-off valve, the utility model is simple in structure, is convenient for adjusting, is close Envelope property is good and can adapt to ultra-low temperature surroundings.Most of component of the utility model by be welded to connect can increase stability with And leakproofness.Bushing can prevent medium flow into Fa Gainei, so as to avoid medium in valve deck filler bonding, hardening and Leakage, prevents medium from being leaked out from valve deck, increases the leakproofness of valve.

Description of the drawings

Fig. 1 is the structural schematic diagram of the utility model.

Fig. 2 is the enlarged drawing at A in Fig. 1.

Figure label meaning：1- valve bodies；11- valve chambers；2- valve decks；21- bushings；3- valve seats；4- flaps；The first grooves of 41-； 42- valve clack covers；421- bulge loops；43- first passages；44- second channels；5- valve rods；The second grooves of 6-；61- baffles；62- springs； 7- water accepting layers.

Specific implementation mode

With reference to the accompanying drawings and examples, specific embodiment of the present utility model is described in further detail.Below Embodiment is not intended to limit the scope of the present invention for illustrating the utility model.

A kind of shut-off valve as shown in Figure 1 to Figure 2, including valve body 1, valve chamber 11, valve deck 2, valve seat 3, flap 4 and valve rod 5, the valve seat 3 is fixed by welding and valve body 1, and the flap 4 is equipped with the first groove 41 coordinated with 5 end of valve rod, institute The opening of the first groove 41 is stated equipped with the valve clack cover 42 for being limited to valve rod 5, the valve clack cover 42 and the first groove 41 are logical Threaded connection is crossed, 4 top of the flap is located at 41 both sides of the first groove and is equipped with the first passage 43 being connected with the first groove 41, 4 bottom of the flap is equipped with the second channel 44 being connected with the first groove 41, and the second channel 44 is located at the end in flap 4 Portion forms sealing surface with 5 end face of valve rod, and decompressor is equipped in the second channel 44, and the decompressor includes being located at second It second groove 6 of 44 both sides of channel, the baffle 61 being located in the second groove 6 and is located between baffle 61 and the second groove 6 Second channel 44 is divide into upper part and lower part by spring 62, the baffle 61, and the bushing being adapted to valve rod 5 is equipped in the valve deck 2 21。

In above structure, valve seat 3 can increase the sealing between valve seat 3 and valve body 1 by being fixedly welded in valve body 1 Property, it is also possible that valve seat 3 seal it is more stable be not easy shake and generate displacement.Valve clack cover 42 is matched with flap 4 to 5 end of valve rod Portion is limited, and it is more secured to enable to valve rod 5 to be connect with flap 4.5 end of the valve rod and valve clack cover are set between 42 bottom There is certain gap, when valve needs to open, valve rod 5 rises, and a part of medium can flow into the by second channel 44 It in one groove 41, is then flowed out by first passage 43, then flow to valve export, medium is received so as to reduce flap 4 Scouring force avoids the Fast Wearing of flap 4 and causes flap 4 that can not form sealing between valve seat 3, to increase valve The service life of valve 4.When valve rod 5 rises to certain altitude, by the limit of valve clack cover 42, flap 4 is driven to rise to together Fully open valve.The valve rod 5 can also adjust the flow of medium with 44 fitted seal of second channel as needed, to be applicable in In different environment.Decompressor can reduce pressure medium, reduce medium and washed away to 4 sealing surface of flap, to increase The service life of flap 4.The pressure of medium squeezes baffle 61 to the second groove 6, realizes the effect for reducing pressure.Spring 62 It enables to baffle 61 to reset, also can further reduce the scouring force of medium.Bushing 21 can prevent medium from flowing into hair lid It is interior, so as to avoid medium to filler bonding, hardening and leakage in valve deck 2, prevent medium from being leaked out from valve deck 2, Increase the leakproofness of valve.

In the present embodiment, the outer circle wall of the valve clack cover 42 is equipped with bulge loop 421, and the bulge loop 421 passes through with flap 4 It is welded to connect.The valve clack cover 42 that can be is securely fixed on flap 4, increases stability.

In the present embodiment, it is in the arc-shaped being bent upwards that the baffle 61, which is located at the end in second channel 44,.It can incite somebody to action The scouring force of medium draws upwards, and enables to baffle 61 that can be extruded into the second groove 6, so as to avoid 61 quilt of baffle Medium fractures.

In the present embodiment, 2 inner wall of the valve deck is equipped with water accepting layer 7, and the water accepting layer 7 is located at 21 top of bushing.Water suction Layer 7 uses absorbing resin material, and when can prevent valve for low temperature, medium in valve chamber 11 and the medium in valve deck 2 can be into Row convection current and heat exchange generate vapor and influence the leakproofness of filler.

The above is only the preferred embodiment of the utility model, it is noted that for the common skill of the art For art personnel, without deviating from the technical principle of the utility model, several improvements and modifications, above-mentioned vacation can also be made If these improvements and modifications also should be regarded as the scope of protection of the utility model.

Claims (4)

1. a kind of shut-off valve, including valve body, valve chamber, valve deck, valve seat, flap and valve rod, it is characterised in that：The valve seat passes through Welding is fixed with valve body, and the flap is equipped with the first groove coordinated with valve stem end, and the opening of first groove is set It is useful for the valve clack cover to valve stem spacing, the valve clack cover is connected through a screw thread with the first groove, and the is located at the top of the flap One groove both sides are equipped with the first passage that is connected with the first groove, and the flap bottom is equipped with the to be connected with the first groove Two channels, the second channel are located at the end in flap and form sealing surface with valve rod end face, be equipped with and subtract in the second channel Pressure device, the decompressor include the second groove for being located at second channel both sides, the baffle being located in the second groove and set Second channel is divide into upper part and lower part by the spring between baffle and the second groove, the baffle, be equipped in the valve deck with The bushing of valve rod adaptation.

2. a kind of shut-off valve according to claim 1, it is characterised in that：The outer circle wall of the valve clack cover is equipped with convex Ring, the bulge loop is with flap by being welded to connect.

3. a kind of shut-off valve according to claim 1, it is characterised in that：The end that the baffle is located in second channel is in The arc-shaped being bent upwards.

4. a kind of shut-off valve according to claim 1, it is characterised in that：The valve deck inner wall is equipped with water accepting layer, described Water entry is above bushing.