CN1008150B - Replaceable wear parts for sliding-gate valve - Google Patents

Abstract

The present invention discloses replaceable refractory metal wear parts for sliding-gate valve components. The parts are made into the shapes of circumferential edges in order to reduce the costs of the parts, conveniently assemble the parts in the valve components and conveniently take out the parts from installation positions in the valve components; the edges are of inclined shapes in order to engage the parts with clamping elements; clamping force of component force with vectors is supplied to the clamping members, and the component force with the vectors plays a role of surrounding refractory metal so as to prevent fracture in case of the occurrence of material fracture, and additionally enables the parts to be fixed at the installation positions relative to a valve mechanism.

Description

Replaceable wear parts for sliding-gate valve

The invention relates to the clamp gate valve who is used on the metallurgical tank, in particular, is about exporting at interior removable refractory metal wearing part comprising metal.The outlet of indication defines the passage of the metal flow of passing valve.

Clamp gate valve's refractory metal wearing part refers specifically to the bottom discharge mouth at restriction container sprue gate and is used to open and close valve, makes the fixedly valve plate and the movable valve plate of metal flow.These parts all are subjected to CR Critical thermal stress, because, the contiguous motlten metal stream of refractory metal material opening, so refractory metal material is subjected to high temperature effect, and these parts also are subjected to quite low temperature effect, because the outer garden circumferential edges of contiguous these parts of refractory metal material.These wearing parts stand so big thermal gradient, because the intrinsic property of refractory metal is unbearable.So under the effect of temperature, part is easy to expand or shrink, thereby part is easy to produce the crack.When expansion is continued in this crack, the trend that part is split is just arranged, so path is provided for the leakage of motlten metal.For this reason,, in actual applications, around these wearing parts, surround or bonding for the refractory metal material that prevents to constitute wearing part is suffering owing to heat causes that the crack produces the phenomenon of splitting then.

In the prior art, be bonding clamp gate valve's refractory metal parts, adopted various devices, make refractory metal material cause breaking of crack so that generation owing to being heated in order to prevent part.That is for example introduced in United States Patent (USP) is such, U.S. Patent number is 3,831,825, the refractory metal valve plate of fixed head and movable platen is placed in the valve-supporting spare of trough of belt, between plate part and supporting member, exist the gap, the gap is with refractory cement or mortar filling, so that valve plate is fixed in their groove seats separately, therefore tightly, under the situation that produces fracture, rely on cement or mortar and plate part bundle is applied together.

In United States Patent (USP), the patent No. is 4,063,668, each refractory metal material valve plate is to be bonded in the light metal housing with mortar, housing equally also plays the effect of surrounding refractory metal material when fracture, as you know, also can utilize band to center on the garden circumferential edges of valve plate, surround refractory material, can also surround refractory metal material with suitable jig or method by compressing.

Each above-mentioned method all exists inherent intrinsic defective in practice, can not comprehensively deal with problems.For example, the device of in United States Patent (USP), introducing, the patent No. is 3,831,825.Because when changing the support of valve part in valve member, so promptly time-consuming effort again is the shortcoming of existing.It need make part breaking with manpower; From the base of part, take out, also remaining cement will be taken out from susceptor surface.Then, need adopt new cement or mortar when new valve is installed into, these cement or mortar also must be handled with the method for heating.

The device of being introduced in United States Patent (USP), the patent No. are 4,063,668, and as employing garden week of part with the method that band shrinks, from another point of view, produce this equipment and waste more, thereby also just increased the cost of investment of equipment.

Therefore, purpose of the present invention is exactly in order to improve these shortcomings of above-mentioned existence.

According to the present invention, provide a kind of structure in order to the mobile clamp gate valve of control motlten metal.Motlten metal flows out from the sprue gate of container, and in container, removable wearing part is a refractory metal parts, the refractory metal element is suitable for being installed on the appropriate support, and, in order to make clamping element clamping part, so the garden circumferential edges of part is skewed.In assembling process, clamping element applies with thrust for the edge of part.Thrust produces a vector component on the direction that is parallel to the wearing part surface, under the crannied situation of part, this component surrounds part; Thrust is producing a vector component on the wearing part susceptor surface, this component is fixed on the support element part.Optimal situation is: the garden circumferential edges that comprises the wearing part of inclined surface, on the whole length of part, it all is crest curve, and clamping element has surrounded the whole part surface, to guarantee surrounding refractory metal material by part total length applied pressure.When measuring perpendicular to the axis of wearing part susceptor surface, the inclination angle of part when this angle is between 5 ° and 25 °, can obtain best clamping effect preferably less than 45 °.

In conjunction with the accompanying drawings, invention is described in detail.In the accompanying drawings:

Fig. 1 is the profilograph according to clamp gate valve of the present invention mechanism, among the figure during expression work clamp gate valve be fixed on the motlten metal pouring container;

Fig. 2 is the amplification profilograph that is used for the typical refractory metal valve plates of Fig. 1 clamp gate valve mechanism, analyses and observe along 2～2 lines among Fig. 3 among the figure;

Fig. 3 is the plane of the refractory metal valve plate among Fig. 2;

Fig. 4 is the profilograph that clamp gate valve's replaceable discharging is chewed among Fig. 1, analyses and observe along 4～4 lines among Fig. 5 among the figure;

Fig. 5 is the plane that removable discharging is chewed among Fig. 1;

Fig. 6 is the sectional view along 6～6 lines among Fig. 1;

Fig. 7 is the amplification sectional view along 7～7 lines among Fig. 6;

Fig. 8 is similar with Fig. 5, just shows the in-house static valve plate assembling situation of clamp gate valve of Fig. 1 in more detail.

Introduce most preferred embodiment below:

With reference to accompanying drawing 1, show cast container 10 among the figure, for example it is a motlten metal casting ladle or pony ladle.Container 10 comprises the inside liner 14 of a shell 12 and refractory metal.At container bottom a material mouthful cushion block 16 is arranged, have a discharging removable, band through hole 20 to chew 18 on the cushion block, through hole is the cast bore that limits container.Clamp gate valve 22 is connected on the container 10 around plug hole 20, because the structure of clamp gate valve's member is well-known, and it can have various versions, so, for invention is understood,, just introduce these about structure problem.

In clamp gate valve's member of being introduced, suitable jockey is connected to the fixed head 24 that shell of tank 12 gets on, (jockey does not draw in the drawings) to comprise a usefulness.Vavle shelf 26 hangs by the jockey that can throw off and fixed head 24 and installs.(jockey does not draw yet).Like this, for reaching the purpose of changing the wearing part in the valve, just can disassemble vavle shelf.About this point, will narrate below and explain.What link to each other with fixed head 24 is the bearing bar 28 of a pair of relative arrangement, define space 30 between bar and the bar, space 30 is to be used for laying the refractory metal valve plate 32 that is fixed on the fixed head 24, have metal flow aperture 34 on the plate 32, it chews 18 aperture 20 with passing discharging, centering each other on axis direction.

Point out that in passing discharging is chewed can install a removable extending element 36 on 18, this element is placed in the base 38 of fixed head 24, its aperture 40 and aperture 20 centerings, and chew in discharging between the aperture of aperture 20 and valve plate 32 and extend.

Carriage 42 is slidably mounted on the area supported 44 of vavle shelf 26, and links (drive unit does not draw in the drawings) on the drive unit by means of connecting rod 46, and carriage is passed in the reciprocating motion of drive unit.Known this drive unit, the type that normally hydraulic operated or electric power is handled.Comprise removable refractory metal valve plate 48 on the carriage 42, the slidingsurface 50 on the plate 48 engages with similar surface on the fixing valve plate 32.By making the method for movement of bracket, when the aperture on the valve plate 48 52 with fixedly 34 pairs in aperture on the valve plate 32 is punctual, the just outflow from container 10 of motlten metal stream.

In order between the slidingsurface of valve plate 32 and 48, to produce sealing load, the device that resiliency urged plate 42 upwards is close to fixed head is installed then.Although can adopt in many elastic pushing devices of knowing any, in the device of being introduced, adopt the elastic pushing device that comprises spring pressure plate 54 with center port.Pressure plare 54 is placed in the carriage 42, and is placed on a series of pressure pad 58, utilizes the spring 66 that is placed in carriage 42 holders, pressure pad 58 upwards can be promoted.

On the lower surface of valve plate 48, be provided with dismountable corresponding discharging and chew 62 in the device, this and the present invention do not have substantial connection.This device comprises garden cylindrical shell 64, and the housing upper end is connected on the pressure plare 54 around aperture 56 with the method for welding or other connections.There are screw thread 66 or other jockeys in the lower end of housing 64, in order to be meshed with locking nut 68.Nut 68 and discharging are chewed 62 and are combined, and make 62 lower surfaces that are close to valve plate 48.

As shown in the figure, 70 places of carriage 26 and 72 places of carriage 42 are provided with suitable aperture, chew 62 so that hold discharging.In addition, melt metal can be flowed by valve member.

According to the present invention, refractory metal wearing part in clamp gate valve's member, be to have special planform, operating personnel are as long as adopt simple method, just these parts can be assembled in the valve body, and needn't between part and valve support member, use the jointing material of cement character, and, do not need in advance wearing part to be processed yet.For example at the valve duration of work, when the situation of fracture took place refractory metal, that adopts in order to surround refractory metal twined around refractory metal material, perhaps adopts the method for mental package member.

A kind of typical refractory metal valve plate among Fig. 2 and Fig. 3 among expression the present invention.Only be that the valve plate of being introduced is appointed as the quiet valve plate 32 that comprises liquid flow hole mouth 34 owing to be convenient to explanation, because in enterprising clamp gate valve's structure, slide plate 32 is identical with 48 version.For invention, the emphasis of construction profile is unnecessary.

Represented valve plate 32 among Fig. 2 and Fig. 3 is the microscler refractory metal elements with slidingsurface 74, and this surface is suitable for engaging with the slip of the moving valve plate 48 that matches, fixed surface 76 be used for gap 30 in the lower surface engages of fixed head 24.To locate in order chewing in discharging in the auxiliary tank in the extension 36, can to install a high boss 77 on the fixed surface 76.(valve plate 48 is the same with plate 32, also have and slide and fixed surface, for the slidingsurface in conjunction with fixed head 32, and in order to combine with pressure plare 54 in the carriage 42, the high boss 77 on the fixed surface 76 of this piece plate is to be arranged in the auxiliary tank that the imagination discharging is chewed).Garden circumferential edges 78 is extended between slip and fixed surface 74 and 76 respectively around plate 32, in order to match with the supporting member of carrying jig, comprises one section sloping portion on the circumferential edges of garden.In order on circumferential edges, to apply, have auxiliary surface on the anchor clamps with pressure.Gradient on the surface 80 is to limit like this, be applied pressure to produce one be parallel to plate surface 74 and 76, towards the inside vector component of the geometric center of plate, and one perpendicular to surface direction, guarantee to make plate can be close to the vector component of area supported.During from vertical axis measurement gradient, the oblique angle can allow in 5 ° to 45 ° scopes.But best angle is 7 ° to 20 °.

Though all gardens of valve plate 32 or 48 can be any desirable shapes,, when it was shaped as convex surface, the practice effect of invention was best.As the shape among Fig. 3.The radius of plate end 82 is less than the radius at edge 84 among the figure.

As depicted in the figures, utilize clamping element 86 and 88, quiet valve plate 32 and moving valve plate 48 can be fixed on respectively on the position in the valve member, the composition surface of clamping element is attached on the hang plate surface basically.The ring-type element that this clamping element is preferably continuous, still, the present invention also plans to adopt a plurality of clamping elements that limit length that have.

Fig. 2 and Fig. 7 have introduced movable valve plate 48 have been fixed to typical clamping element 88 on the pressure plare 55.As shown in FIG., clamping element 88 extends along annular around valve plate 48, and with having several bolts 90 of certain distance to be fixed on the pressure plare 55 around garden Zhou Fangxiang.Preferably as among Fig. 7, each bolt head of bolt 90 all is located in the groove 92 of anchor clamps 88, owing to torque nut 94 applies a power.Nut 94 is fixed to the end of thread of bolt on the pressure plare 54.

Fig. 8 points out quiet valve plate 32 is fixed to the get on detailed structure of employed clamping element 86 of fixed head 16.Equally, clamping element 86 the most handy bolts 90 fix, and bolt 90 is between clamping element 86 and ring-shaped bearing ring 96, and support ring is placed in the annular groove 98 in fixed head 24 lower surfaces, and contacts with the fixed surface 76 of valve plate 32.

Fig. 4 and Fig. 5 show the detailed structure of chewing extension 68 with the corresponding to discharging of the present invention.As shown in FIG., the extension generally comprises the cylindrical sleeve part 100 and the large diameter bottom 103 that have through hole 102, and it has by the diametric(al) of sleeve extends, the locating surface 104 that is made of annular shoulder.The centre that 36 lower surface 106 is chewed in discharging is provided with central channel 108, and it is in order to hold high boss 77 on the valve plate 32.As shown in the figure, inclined surface 110 is arranged on the circumferential edges of bottom 103, it respectively with valve plate 32 and 48 on inclined surface similar.As shown in fig. 1, the attached surface engagement that helps on inclined surface 110 and the circumferential clasp 112, snap ring 112 usefulness bolts 114 direct knobs are to fixed head 24.

Pass through embodiments of the invention, can recognize, remove and on groove on 36 and 62 is chewed in the boss on each valve plate 32 and 48 77 and the discharging that is adjacent, adopt beyond the easily crisp sealing mortar 116, the wearing part that adopts in the clamp gate valve mechanism of being introduced, can both produce with minimum cost, and, also can both assemble and dismantle with the minimum amount of labour for renewal part.

Claims (6)

1, a kind ofly be used to control clamp gate valve's member that motlten metal flows out from container, comprise in the above-mentioned valve member that one limits in the hole that metal flows out from container and chews and valve plate with holes, a valve plate has with above-mentioned hole chews the fixedly aperture of centering, the aperture of another valve plate can move with respect to the fixing hole of valve plate, in order to the metal flow of control by above-mentioned valve, above-mentioned hole chew with valve plate be removable refractory metal wearing part, each comprises that is placed in a refractory material body that connects in the support apparatus, and comprise a pair of apparent surface who separates, a surface is the fixed surface that bears on the above-mentioned support apparatus, circumferential edges extends between the apparent surface around body, it is characterized in that: at least one above-mentioned removable wearing part comprises a circumferential edges, circumferential edges has at least one section to tilt, inclined plane on the matched edges, one inclined plane is arranged on the anchor clamps, so that exert pressure on the edge, pressure has the vector component that is parallel to body surface and towards the vector component of fixed surface.

2, according to the clamp gate valve's member described in the claim 1, it is characterized in that the refractory metal body is a continuous tilt around its whole circumference, anchor clamps surround body.

3, according to described in the claim 2, clamp gate valve's member is characterized in that the body edge is a convex shape around whole circumference.

4, according to the clamp gate valve's member described in the claim 3, the inclination angle that it is characterized in that circumferential edges is less than 45 °, and it is to measure from the axis perpendicular to body surface.

5, according to the clamp gate valve's member described in the claim 4, the inclination angle that it is characterized in that circumferential edges is between 5 ° and 20 °.

6,, it is characterized in that anchor clamps rely on dismountable connector to be fixed on the continuous support apparatus according to each the described clamp gate valve's member in the claim 1 to 5.

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