CN208123608U - Bellows stop valve - Google Patents

Abstract

The utility model discloses a kind of bellows stop valves, it includes valve body, pin shaft, the first nut, balance gasket, valve plate, separation ring, gasket gland, valve rod, bellows, stud, the second nut, valve deck, filler, valve plate is mounted among valve body, first nut is located on the downside of valve body, pin shaft lower part is located in the first nut, the top of pin shaft is located among valve plate and pin shaft and valve plate junction are equipped with balance gasket, and separation ring is located at the top of pin shaft and separation ring is connected with valve rod.The utility model good seal performance, not easy to wear, without fluid loss, high temperature resistant and long service life, structure is simple, manufactures easy to maintain.

Description

Bellows stop valve

Technical field

The utility model relates to a kind of shut-off valves, more particularly to a kind of bellows stop valve.

Background technique

Bellows stop valve mainly realizes main sealing by bellows at this stage, and medium is flowed to from bottom to top, led Cause valve close moment larger, unlatching moment is smaller, the superiority for also adequately not utilizing sylphon seal performance high, cut-off Valve is generally often in close state, and for a long time by the impact force of medium, is easy to cause the valve rod stress time longer, quilt occurs in valve rod The case where bending, so the diameter of valve rod must be increased to enhance the intensity of valve rod.

Summary of the invention

The technical problem to be solved by the utility model is to provide a kind of bellows stop valve, the utility model sealing performances Good, not easy to wear, without fluid loss, high temperature resistant and long service life, structure is simple, manufactures easy to maintain.

The utility model is to solve above-mentioned technical problem by following technical proposals：A kind of bellows stop valve, Including valve body, pin shaft, the first nut, balance gasket, valve plate, separation ring, gasket gland, valve rod, bellows, stud, the second spiral shell Mother, valve deck, filler, gland, the second stud, guide plate, valve stem nut, handwheel, tight split nut, valve plate are mounted in valve body Between, the first nut is located on the downside of valve body, and pin shaft lower part is located in the first nut, the top of pin shaft be located at valve plate centre and pin shaft and Valve plate junction is equipped with balance gasket, and separation ring is located at the top of pin shaft and separation ring is connected with valve rod, and stem bottom is equipped with pad Piece gland, outside is equipped with bellows in the middle part of valve rod, and the junction of valve deck and valve body is equipped with screw bolt and nut, valve rod top be located at In valve deck, the junction of valve rod and valve deck is equipped with filler, and gland, guide plate gland top and and valve are equipped on the upside of filler Bar is connected, and guide plate is equipped with the second stud, and valve stem top is located in valve stem nut, and handwheel is mounted on valve stem nut, valve rod spiral shell Female top is equipped with tight split nut.

Preferably, the valve body is used is sealed firmly using the conical surface.

Preferably, the shape of the handwheel is round.

Preferably, gasket ring is equipped between the valve body and valve rod.

The positive effect of the utility model is：The utility model good seal performance, it is not easy to wear, it is damaged without fluid It loses, high temperature resistant and long service life, structure is simple, manufactures easy to maintain.

Detailed description of the invention

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

Specific embodiment

The utility model preferred embodiment is provided, with reference to the accompanying drawing the technical solution of the utility model is described in detail.

As shown in Figure 1, the utility model bellows stop valve include valve body 1, pin shaft 2, the first nut 3, balance gasket 4, Valve plate 5, separation ring 6, gasket gland 7, valve rod 8, bellows 9, stud 11, the second nut 12, valve deck 13, filler 14, filler pressure Lid 15, the second stud 16, guide plate 17, valve stem nut 18, handwheel 19, tight split nut 20, valve plate 5 are mounted among valve body 1, and first Nut 3 is located at the downside of valve body 1, and 2 lower part of pin shaft is located in the first nut 3, the top of pin shaft 2 be located at 5 centre of valve plate and pin shaft 2 and 5 junction of valve plate is equipped with balance gasket 4, and separation ring 6 is located at the top of pin shaft 2 and separation ring 6 is connected with valve rod 8,8 bottom of valve rod Equipped with gasket gland 7,8 middle part outside of valve rod is equipped with bellows 9, and valve deck 13 and the junction of valve body 1 are equipped with bolt 11 and nut 12, in valve deck 13, the junction of valve rod 8 and valve deck 13 is equipped with filler 14 on valve rod 8 top, is equipped with filler on the upside of filler 14 Gland 15, the top of 17 gland of guide plate 15 and is connected with valve rod 8, and guide plate 17 is located at equipped with the second stud 16 at the top of valve rod 8 In valve stem nut 18, handwheel 19 is mounted on valve stem nut 18, and tight split nut 20 is equipped at the top of valve stem nut 18.

The valve body is used to be sealed firmly using the conical surface, improves air-tightness.

The shape of the handwheel is circle so that it is convenient to controlled valve.

Gasket ring 10 is equipped between the valve body and valve rod, in this way raising leakproofness.

Utility model works principle is as follows：This bellows stop valve designs medium flow direction from top to bottom, at this moment in medium Under pressure effect, the power of closing valve is small, and the power of valve opening door is big, and the diameter of valve rod can be reduced correspondingly, because shut-off valve is normal It is in close state, and power suffered by valve plate is from top to bottom, is ultimately applied on valve body, so being not in what valve rod was bent Situation, valve rod and valve plate are connected through some small parts（Fastener, sealing element etc.）Realize modularization connection and its compression The characteristic for realizing self-sealing is convenient for changing part and maintenance when valve rod and valve plate and bellows break down, and valve rod it There are some superiority that self structure is exclusive, such as switch is without friction, and sealing is not easy to wear, and close moment is small, and there are also following Advantage：Dual Seal Design（Bellows+filler）If ripple tube failure, valve stem packing can also avoid leaking, and meet the world Seal standard；There is no fluid loss, reduce energy loss, improves safety of factory equipment；Long service life reduces maintenance frequency, Reduce operating cost；Robust sylphon seal design, guarantees the zero leakage of valve rod, provides the condition of Maintenance free；It adopts With PTFE soft sealing material, the leakproofness of this valve is improved；High temperature resistant≤425 DEG C valve body is sealed firmly using the conical surface, reaches air-tightness Can, zero leakage.

In conclusion the utility model good seal performance, not easy to wear, and without fluid loss, high temperature resistant and service life Long, structure is simple, manufactures easy to maintain.

Particular embodiments described above, the technical issues of to the solution of the utility model, technical scheme and beneficial effects It has been further described, it should be understood that the foregoing is merely specific embodiment of the utility model, not For limiting the utility model, within the spirit and principle of the utility model, any modification for being made, changes equivalent replacement Into etc., it should be included within the scope of protection of this utility model.

Claims (4)

1. a kind of bellows stop valve, which is characterized in that it includes valve body, pin shaft, the first nut, balance gasket, valve plate, separation Ring, gasket gland, valve rod, bellows, stud, the second nut, valve deck, filler, gland, the second stud, guide plate, valve rod spiral shell Mother, handwheel, tight split nut, valve plate are mounted among valve body, and the first nut is located on the downside of valve body, and pin shaft lower part is located at the first nut Interior, the top of pin shaft is located among valve plate and pin shaft and valve plate junction are equipped with balance gasket, and separation ring is located at the top of pin shaft And separation ring is connected with valve rod, stem bottom is equipped with gasket gland, and outside is equipped with bellows, the company of valve deck and valve body in the middle part of valve rod It meets place and is equipped with screw bolt and nut, in valve deck, the junction of valve rod and valve deck is equipped with filler on valve rod top, sets on the upside of filler There is a gland, be connected above guide plate gland and with valve rod, guide plate is located at valve rod spiral shell equipped with the second stud, valve stem top In mother, handwheel is mounted on valve stem nut, and tight split nut is equipped at the top of valve stem nut.

2. bellows stop valve as described in claim 1, which is characterized in that the valve body is used to be sealed firmly using the conical surface.

3. bellows stop valve as described in claim 1, which is characterized in that the shape of the handwheel is round.

4. bellows stop valve as described in claim 1, which is characterized in that be equipped with gasket ring between the valve body and valve rod.