EP0080672A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Improvements in sliding gate valves
Assignee: Usx Engineers And Consultants Inc Te Pittsburgh
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Filing: 1982-11-19
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Granted: —
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Expires: 2002-11-19
Abstract
Abstract In order to resist alteration of the spring forces utilized for applying seal pressure between the valve bodies in sliding gate valves for molten metal pouring, particularly those of the manually operated type, the valve support plate and the mounting plate are arranged to form a narrow slot that receives the valve actuator and presents insufficient clearance to permit excessive relative displacement between the valve members. The valve further incorporates releasable attachments, two of which serve as hinge connections for the support plate while the other serves as a latching member. Each of the attachments comprise clevis-mounted eyebolts in which the clevises have predetermined dimensions to establish a fixed, pre-set distance between the plates upon reassembly of the valve after opening and thus insure repeatability of the spatial relationships between the valve bodies and, concomitantly, of the seal pressure between the members.
Inventors
- 👤 Kenneth William Bates
- 👤 Norman Henry Watts
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 13:24
CPC Classifications
B; B22; B22D; B22D41/00; B22D41/14; B22D41/22; B22D41/24; B22D41/26; Y; Y10; Y10T; Y10T137/00; Y10T137/598; Y10T137/6065; Y10T137/6072; Y10T137/6075; Y10T137/6851; Y10T137/7036
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
195 words
A sliding gate valve for use in the pouring of molten metals, comprising a mounting plate, a support plate, and two orificed refractory valve bodies spring-pressed into sealing facial contact one with the other, wherein one valve body serves as a gate and is movable relative to the other for opening and shutting the valve, the support plate carrying spring means which thrust the downstream one of the valve bodies against the other, and the two plates being secured together by releasable attachment devices which maintain a pre-set spacing between the plates, the attachments serving as hinges and clamps respectively and the latter, when released, permitting the plates to be swung apart for inspection or replacement of the valve bodies, each attachment comprising a clevis on one plate to which is pinned an eyebolt for passing i through the other plate, the clevises being of predetermined dimensions such that when nuts on the eyebolts are tightened to draw the plates together, abutment of the clevises with the said other plate results in attainment of the said pre-set spacing and in re-attainment of a previously set spring-bias after restoration of the valve to its operative state.
Claim 2
Dependent Claim
195 words
A sliding gate valve for use in the pouring of molten metals, comprising a mounting plate, a support plate, and two orificed refractory valve bodies spring-pressed into sealing facial contact one with the other, wherein one valve body serves as a gate and is movable relative to the other for opening and shutting the valve, the support plate carrying spring means which thrust the downstream one of the valve bodies against the other, and the two plates being secured together by releasable attachment devices which maintain a pre-set spacing between the plates, the attachments serving as hinges and clamps respectively and the latter, when released, permitting the plates to be swung apart for inspection or replacement of the valve bodies, each attachment comprising a clevis on one plate to which is pinned an eyebolt for passing i through the other plate, the clevises being of predetermined dimensions such that when nuts on the eyebolts are tightened to draw the plates together, abutment of the clevises with the said other plate results in attainment of the said pre-set spacing and in re-attainment of a previously set spring-bias after restoration of the valve to its operative state.
Claim 3
Dependent Claim
40 words
A valve according to claim 1, wherein two of the attachment devices have their eyebolt-securing clevis pins aligned with a common axis whereby these devices serve together as a hinge, and the valve has at least one other attachment device.
Claim 4
Dependent Claim
23 words
A valve according to claim 2, which comprises two confronting stationary valve bodies between which the movable valve body or gate is sandwiched.
Claim 5
Dependent Claim
44 words
A valve according to claim 3, wherein the movable valve body is held in a frame located between the said two plates, the frame being pivoted to the support plate for swinging movement about an axis parallel to a flow channel through the valve.
Claim 6
Dependent Claim
36 words
A valve according to any of claims 1 to 4, wherein the spring means biasing the valve bodies are carried by the support plate and exert biasing force against a downstream one of the valve bodies.
Claim 7
Dependent Claim
23 words
A valve according to claim 5, wherein the spring means apply said force evenly around a peripheral portion of said one valve body.
Claim 8
Dependent Claim
42 words
A valve according to claim 6, wherein the spring means comprise a plurality of spring devices each having one or more compressed spring units acting between the support plate and a force-transmitting rocker mounted thereon and abutting the said one valve member.
Claim 9
Dependent Claim
32 words
A valve according to claim 7, wherein the force exerted by each spring device is changeable independently of the others by adjustment of the mounting securing its rocker to the support plate.
Claim 10
Dependent Claim
162 words
A sliding gate valve providing a flow channel for use in the pouring of molten metals, comprising a mounting plate, a support plate and at least two orificed refractory valve bodies spring-pressed into sealing facial contact with one another, one of the valve bodies, which serves as a gate, being mounted in a frame pivoted to the support plate for to-and - fro movement about and axis parellel to the channel to open and shut the valve to metal flow, and the two plates forming a narrow slot through which an actuating lever portion of the frame extends, the slot slidingly receiving the lever portion and coacting therewith to resist inadvertent displacements of the frame-mounted valve body likely to engender leakage of molten metal between the valve bodies, the support plate being secured to the mounting plate by releasable attachments which maintain a pre-set spacing therebetween and also maintain the slot width substantially constant despite repeated dismantling and reassembling of the valve.
Claim 11
Dependent Claim
162 words
A sliding gate valve providing a flow channel for use in the pouring of molten metals, comprising a mounting plate, a support plate and at least two orificed refractory valve bodies spring-pressed into sealing facial contact with one another, one of the valve bodies, which serves as a gate, being mounted in a frame pivoted to the support plate for to-and - fro movement about and axis parellel to the channel to open and shut the valve to metal flow, and the two plates forming a narrow slot through which an actuating lever portion of the frame extends, the slot slidingly receiving the lever portion and coacting therewith to resist inadvertent displacements of the frame-mounted valve body likely to engender leakage of molten metal between the valve bodies, the support plate being secured to the mounting plate by releasable attachments which maintain a pre-set spacing therebetween and also maintain the slot width substantially constant despite repeated dismantling and reassembling of the valve.
Claim 12
Dependent Claim
33 words
A valve according to claim 9, which comprises two confronting, stationary valve bodies between which the slidably movable valve body is sandwiched, the frame therefor being disposed between the mounting and support plates.
Claim 13
Dependent Claim
43 words
ll. A valve according to claim 10, wherein there is a plurality of the said attachments spaced about the peripheries of the two plates, and at least one of the attachments serves as a hinge linking the plates when companion attachments are released.
Claim 14
Dependent Claim
73 words
A valve according to claim 11, wherein each attachment comprises a clevis on one plate having an eyebolt pinned thereto which passes through the other plate and has a - fastener engaging the latter screw-threaded thereon, and the said other plate has a distance piece thereon for abutment by the clevis, the clevis and distance piece being of predetermined dimensions for determining the pre-set spacing between the plates when the attachment is secured.
Claim 15
Dependent Claim
44 words
A valve according to any of claims 9 to 12, wherein the lever portion of the frame is located to one side of the slidably movable valve member and the pivot for the frame is to the opposite side of the said valve member.
Claim 16
Dependent Claim
31 words
A valve according to claim 13, wherein spring means biasing the valve bodies are carried by the support plate and exert biasing force against a downstream one of the valve members.
Claim 17
Dependent Claim
24 words
A valve according to claim 14, wherein the spring means apply said force evenly around a peripheral portion of the said one valve member.
Claim 18
Dependent Claim
42 words
A valve according to claim 15, wherein the spring means comprise a plurality of spring devices each having one or more compressed spring units acting between the support plate and a force-transmitting rocker mounted thereon and abutting the said one valve member.
Claim 19
Dependent Claim
32 words
A valve according to claim 16, wherein the force exerted by each spring device is changeable independently of the others by adjustment of the mounting securing its rocker to the support plate.
References Cited (Backward Citations)
No citation records indexed.
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