CN1042854C - External screw yoke ring type valve - Google Patents

Abstract

The present invention relates to an outer screw yoke ring type valve capable of using a rubber gasket or a plastic gasket with favorable sealing performance. In order to replace a sealing gasket, a gasket gland is made into a structure capable of being divided into a plurality of parts by being disassembled from a shaft.

Description

External screw yoke ring type valve

The present invention relates to external screw yoke ring type valve, relate in particular to the external screw yoke ring type valve that to change liner easily.

In the fluid passage of the pressurized gas of a liquid that flows through water one class or LPG (liquefied petroleum gas (LPG)) class, external screw yoke ring type valve is installed in order to open and close this fluid passage.

Fig. 6 and the external screw yoke ring type valve that Figure 7 shows that in the past.

External screw yoke ring type valve 1 has valve casing 2, yoke ring 5, axle 7, valve body 8, handle 9, liner 11, gland ring 12 and liner pushing member 13.

In valve casing 2, be provided with fluid passage 3 and valve seat 4.

Yoke ring 5 is arranged on the outside of valve casing 2, and there is through hole in heart portion therein.In the through hole of yoke ring 5, lining 6 embeds and is fixed.There is female thread at the center of lining 6.

The external screw thread that axle 7 has the female thread with lining 6 to screw runs through the wall of valve casing 2 and extends in the valve casing.

Be located at the valve body 8 of axle on 7 one ends and valve seat 4 co-action and carry out the on-off action of fluid passage 3.On the other end of axle 7, handle 9 is installed regularly by nut 10.

Between valve casing 2 and axle 7, dispose liner 11 for the sealing that keeps these two.What used as liner is as shown in figure 10 yarn matter liner in the past.Yarn matter liner is also referred to as textile washer, is the member of fibrage being made wire.Yarn matter liner length cut-out use in accordance with regulations with this wire.Figure 10 represents the state of length cut-out in accordance with regulations, and cutout portion is being positioned over assigned position shown in Figure 7 under overlapping state.In the valve of Fig. 7, use 4 layers of yarn matter liner as liner.

In order to keep the sealing of liner 11, gland ring 12 and gland pushing member 13 is set.Fig. 8 represents gland pushing member 13, and Fig. 9 represents gland ring 12.Gland ring 12 has the center hole 20 that passes axle 7 usefulness.Equally, also there is the center hole 17 that passes axle 7 usefulness in the central authorities of gland pushing member 13.As shown in Figure 8, gland pushing member has elongated shape, has through hole 18,19 at its two ends.

Referring to Fig. 7, on valve casing 2,2 lifting bolts 14 are installed by pin 15.2 lifting bolts 14 pass the through hole 18,19 of gland pushing member 13.Thereby in the time will tightening with the nut 16 that lifting bolt 14 screws, gland pushing member 13 and gland ring 12 keep the sealing of liner 11 with liner 11 compressions.

When rotating operation handle 9, axle 7 moves up and down, and correspondingly valve body 8 also moves up and down and carries out the on-off action of fluid passage 3 therewith.

When liner 11 worsens sealing in wearing and tearing or damage, need change into liner 11 new.At this moment, unclamp that nut 16 pushes member 13 with gland and gland ring 12 unloads from valve casing 2.Gland pushing member 13 has elongated shape as shown in Figure 8.Therefore, even removal is embedded in the lining 6 in yoke ring 5 center holes, gland pushing member 13 can not be extracted from the center hole of yoke ring 5.

Therefore, in external screw yoke ring type valve 1 in the past, can not use the liner of the ring-type that does not disconnect as liner 11, and use yarn matter liner shown in Figure 10.

It is poor that the rubber bushing of yarn matter liner and ring-type or plastic gasket are compared sealing.And yarn matter liner does not have elasticity.

Therefore, good for the liner sealing that keeps constituting by yarn matter liner, must strengthen tightening nut 16 and increase by gland pushing member 13 and 12 applied pressures of gland ring.

Also have, in the long-term situation of using valve, liner 11 wearing and tearing that constitute by yarn matter liner and sealing becomes very poor.Therefore, must increase tightening continually to nut 16.

In addition, if increase tightening of nut 16, the liner 11 that is made of yarn matter liner increases with the frictional force of axle 7, the rotating operation of handle 9 difficulty that becomes.

For solving above-mentioned problem, its purpose is, the rubber bushing of the ring-type that can use the performance excellent sealing or the external screw yoke ring type valve of plastic gasket are provided just in the present invention.

Another object of the present invention provides a kind of external screw yoke ring type valve of tightening, can often giving stable revolution steering force that does not need to increase to liner.

The invention provides a kind of external screw yoke ring type valve, have: the valve casing that fluid passage and valve seat are arranged in inside, the yoke ring on this valve casing outside of being located at that center hole is arranged, what female thread was arranged removably is contained in lining in the yoke ring center hole, running through the valve casing wall and extending to axle in the valve casing of the external screw thread that screws mutually with this female thread arranged, cooperate the valve body on this end of being located at that works and can open and close fluid passage with valve seat, for making axle rotate the handle that is located on this other end, be disposed at the liner of the two sealing of maintenance between this valve casing and the axle, the liner pushing member that contains axle and the sealing liner is pressurizeed from the valve casing outside, from the opposite side of described relatively liner pushing member described liner is carried out the elastic device that elasticity is pressurizeed, be characterized in, this liner pushing member has can be from the structure that is divided into several parts of this dismounting, and the sealing liner is the end from the axle poroid embedding in center of passing through yoke ring, rubber system or the plastic liner that does not have the ring-type of disconnection.

The simple declaration of accompanying drawing:

Fig. 1 is the sectional view of expression one embodiment of the invention.

Fig. 2 is the sectional view along Figure 1B-B line.

Fig. 3 is the plan view of inserted stuffing box installment state.

Fig. 4 is half partitioning portion stereogram of expression inserted stuffing box.

Fig. 5 is other routine plan views of expression inserted stuffing box.

Fig. 6 is a plan view of representing external screw yoke ring type valve in the past, and has represented phantom.

Fig. 7 is the sectional view along Fig. 6 A-A line.

Fig. 8 is the gland pushing member stereogram of representing in the past.

Fig. 9 is the gland ring stereogram of representing in the past.

Figure 10 represents in the past the yarn matter seal ring stereogram that uses as liner.

Below by accompanying drawing the embodiment of the invention is described.

Fig. 1 and Fig. 2 represent an embodiment by external screw yoke ring type valve of the present invention.

External screw yoke ring type valve 50 has: the valve casing 51 that fluid passage 52 and valve seat 53 are arranged in inside, the yoke ring 54 that on the outside of valve casing 51, is provided with, center hole at yoke ring 54 embeds and fixing lining 55, the external screw thread that screws mutually with the female thread of lining 55 is arranged and run through the wall of valve casing 51 and extend to axle 56 in the valve casing 51, collaborative valve seat 53 works and can open and close the valve body 57 on axle 56 1 ends of being located at of fluid passage 52, for being rotated by nut 59, axle 56 is fixed on handle 58 on axle 56 the other ends, be configured between valve casing 51 and the axle 56 and make between the two liner 60 that keeps sealing, the inserted stuffing box 61 that contains axle 56 and liner 60 is pressurizeed from the outside of valve casing 51.

In illustrated desirable embodiment, in order to make 60 applied pressures of liner are often kept certain, the spring 66 as the elastic device that liner 60 is carried out the elasticity pressurization is housed from the opposite of relative inserted stuffing box.Be not limited to spring 66 as elastic device, it is also passable that other can carry out the member of elasticity pressurization to liner 60.

As liner 60, can use the good ring-shaped rubber that does not disconnect of sealability to make the liner of plastics.

Fig. 3 is the plan view of inserted stuffing box 61 installment states.As shown in the figure, have can be from the structure that is divided into several parts of axle 56 dismounting for inserted stuffing box 61.In this embodiment, be the structure that is divided into double part 61a and 61b.

As shown in Figure 4, double part 61 has lip part 64 and ring part 65.Lip part 64 is provided with through hole 63.Another double part 61b has same structure.

As shown in Figure 2, as if inserting screw 62 and being screwed in the valve casing 51, the inserted stuffing box of being made up of 2 double part 61a, 61b 61 is fixed on the valve casing 51 with the state to liner 60 pressurizations in the through hole of double part 61a, 61b.

For liner 60 owing to often it is applied certain pressure, so even valve is used for a long time, its plus-pressure does not have much variations yet, and can keep good sealing property from two directions up and down.And, owing to do not need to increase to the tightening of screw 62, so the rotating operation moment of handle 58 can not increase yet.

Also have, owing to can use the rubber bushing of the good ring-type of sealability or plastic gasket, therefore obtain the good external screw yoke ring type valve of sealing with in the past specific energy mutually as liner 60.

When liner 60 wearing and tearing or damage, can change new liner in the following order.

At first, unclamp nut 59 and pull down handle 58, further lining 55 is extracted from the center hole dismounting of yoke ring 54 and from axle 56 from axle 56.

Then new liner is passed axle 56, the center hole by yoke ring 54, once more lining 55 is put into the center hole of yoke rings 54.Further handle 58 is contained on the axle 56, fastening nut 59 and fixing.

Handle with sleeve 58 makes and is located at the valve body 57 of axle on 56 1 ends and rises, and the contrary seat a at valve body back is contacted with a contrary b on the valve casing 51, keeps sealing in the position below liner 60.

Under this state, unclamp screw 62, from axle 56, inserted stuffing box 56 is unloaded, old liner 60 is cut off and pulls down from axle 56.With inserted stuffing box 61 new liner is pushed, tighten screw 62.

In embodiment illustrated in figures 1 and 2, inserted stuffing box 61 has all-in-one-piece lip part 64 and ring part 65.Structure about this inserted stuffing box has various distortion.

Figure 5 shows that another example of inserted stuffing box.In this example, inserted stuffing box has 1 pressing plate 70 and 2 liner pressure rings 73 that are divided into 2 double parts.On pressing plate 70, form slotted hole 71.The screw 72 that pressing plate 70 is fixed on the valve casing is inserted in the slotted hole 71 of pressing plate 70.

To the direct pressurization of liner is the liner pressure ring 73 of double segmenting structure.In order to prevent that liner pressure ring 73 from extracting from the top, pressing plate 70 docks with the upper end of liner pressure ring 73.In transposing during liner, unclamp screw 72 and make pressing plate 70 by among the figure to right-hand slip.If make pressing plate 70 slide to the most right-hand position,, therefore can unload from axle because expose fully the upper end of liner pressure ring 73.

By above explanation,,, therefore can obtain the external screw yoke ring type valve of performance excellent sealing owing to can use the rubber bushing or the plastic gasket of the good ring-type of sealability according to the present invention.

Also have, by the elastic device that liner is carried out the elasticity pressurization that is equipped with from relative inserted stuffing box offside, can be not to inserted stuffing box increase tighten, and can often obtain stable rotating operation moment.

Claims (1)

1. external screw yoke ring type valve, have: the valve casing (51) that fluid passage and valve seat are arranged in inside, yoke ring (54) on the aforementioned valve casing of being located at of the center hole outside is arranged, the interior lining (55) of the center hole that removably is contained in described yoke ring that female thread is arranged, running through the valve casing wall and extending to axle (56) in the valve casing of the external screw thread that screws mutually with described female thread arranged, cooperate the valve body (57) on aforementioned axis one end of being located at that works and can open and close described fluid passage with described valve seat, for being rotated, described axle is located at described handle (58) on the other end, be disposed at the liner (60) of the two sealing of maintenance between described valve casing and the described axle, the liner pushing member (61) that contains described axle and described liner is pressurizeed from the valve casing outside, from the opposite side of described relatively liner pushing member described liner is carried out the elastic device (66) that elasticity is pressurizeed, it is characterized in that, described liner pushing member has can be from the structure that is divided into several parts of described axle dismounting, and described liner (60) is from the poroid embedding in center by described yoke ring of an end of described, rubber system or the plastic liner that does not have the ring-type of disconnection.

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