Molten metal pump system
First Claim
1. A molten metal pump refractory connection joint, comprising:
- a refractory post with a first end, the first end including an internally threaded joint screw aperture;
a refractory base with a post aperture configured to receive the first end of the refractory post, and with a screw aperture contiguous with the post aperture; and
a joint screw with a first end and a second end, the joint screw including a threaded external surface and a retention shoulder, the joint screw configured to insert through the screw aperture in the refractory base with the threaded external surface engaging the internally threaded joint screw aperture of the refractory post, and the retention shoulder engaging the refractory base.
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Accused Products
Abstract
A molten metal pump system which generally provides a refractory connection joint for connecting a refractory pump post to a pump base, the pump post including a refractory post with a first end, the first end including an internally threaded joint screw aperture; a refractory base with a post aperture configured to receive the first end of the refractory post, and with a screw aperture contiguous with the post aperture; and a joint screw with a first end and a second end, the joint screw including a threaded external surface and a retention shoulder, the joint screw configured to insert through the screw aperture in the refractory base with the threaded external surface engaging the internally threaded joint screw aperture of the refractory post, and the retention shoulder engaging the refractory base.
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Citations
11 Claims
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1. A molten metal pump refractory connection joint, comprising:
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a refractory post with a first end, the first end including an internally threaded joint screw aperture;
a refractory base with a post aperture configured to receive the first end of the refractory post, and with a screw aperture contiguous with the post aperture; and
a joint screw with a first end and a second end, the joint screw including a threaded external surface and a retention shoulder, the joint screw configured to insert through the screw aperture in the refractory base with the threaded external surface engaging the internally threaded joint screw aperture of the refractory post, and the retention shoulder engaging the refractory base. - View Dependent Claims (2, 3, 4)
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5. A molten metal pump replacement post and joint screw combination for use in a refractory connection joint which includes a refractory base with a post aperture on a first side and a screw aperture on a second side of the refractory base, the screw aperture being contiguous with the post aperture, the replacement post and joint screw comprising:
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a refractory replacement post with a first end, the first end including an internally threaded joint screw aperture and an outer surface configured to insert into the post aperture in the refractory base; and
a replacement joint screw with a first end and a second end, the joint screw including a threaded external surface and a retention shoulder, the joint screw configured to insert through the screw aperture in the refractory base with the threaded external surface configured to threadingly engage the internally threaded joint screw aperture of the replacement post, and the retention shoulder configured to engage the base. - View Dependent Claims (6, 7, 8, 9)
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10. A molten metal pump system comprising:
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a pump motor mounted to a mount structure, the mount structure including a shaft aperture;
an impeller shaft with a first end operatively attached to the pump motor and a second end mounted to a pump impeller, the impeller shaft being positioned within the shaft aperture of the mount structure;
a pump base;
a plurality of pump posts each with a first end attached to the mount structure and each with a second end attached to the pump base via a refractory connection joint, the refractory connection joint comprising;
the first end of the pump post with an internally threaded aperture;
a post aperture in the pump base, the post aperture configured to receive the first end of the pump post, the pump base further including a screw aperture contiguous with the post aperture; and
a joint screw with a first end and a second end, the joint screw including a threaded external surface and a retention shoulder, the joint screw configured to insert through the screw aperture in the pump base, and with the threaded external surface of the joint screw engaging the internally threaded joint screw aperture of the pump post, and the retention shoulder engaging the pump base.
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11. A method for assembling a molten metal pump refractory connection joint comprising the following:
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providing a refractory post with a first end, the first end including an internally threaded joint screw aperture;
providing a refractory base with a post aperture configured to receive the first end of the refractory post, and with a screw aperture contiguous with the post aperture;
providing a joint screw with a first end and a second end, the joint screw including a threaded external surface and a retention shoulder;
inserting the joint screw through the screw aperture in the refractory base;
axially rotating the joint screw such that the threaded external surface engages the internally threaded joint screw aperture of the refractory post, and further such that the retention shoulder engages the refractory base; and
continuing to rotate the joint screw until the post is securely drawn into the post aperture.
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Specification