Stop valve rod anti-rotation mechanism with gearbox

Abstract

The utility model discloses a stop valve stem anti-rotation mechanism with a gearbox, which comprises two bonnet guide ribs, a stud, a nut, a valve stem and two guide blocks, the valve stem is mounted between the two bonnet guide ribs, the two guide blocks are symmetrically mounted on two sides of the valve stem, and the two guide blocks are connected with the stud. And the two guide blocks are fixedly connected together through a stud and a nut. According to the gear box stop valve, a novel structure is adopted, an existing gear box stop valve is improved, an anti-rotation structure is additionally arranged on the valve rod and between the two valve cover guide ribs, it can be guaranteed that the valve rod cannot rotate when moving up and down, and the gear box stop valve is simple and reasonable in structure, good in anti-rotation effect, low in manufacturing cost and high in practicability.

Description

Technical Field

[0001] The utility model relates to a valve, in particular to a stop valve stem anti-rotation mechanism with a gear box. Background Art

[0002] A globe valve, whose closing member (disc) moves along the centerline of the valve seat, primarily serves as a regulating and shutoff valve in pipelines. Its simple structure makes it easy to manufacture and maintain. Its sealing surfaces are resistant to wear and abrasion, and since there is no relative sliding between the disc and the sealing surface of the valve body during opening and closing, wear and abrasion are minimal. This results in excellent sealing performance and a long service life, making it widely used. However, when a gearbox is used to open and close the valve, the stem nut inside the gearbox is fixed, forcing the stem to move only upwards and downwards. Therefore, an anti-rotation device is required between the stem and bonnet. To address this issue, we propose a globe valve stem anti-rotation mechanism with a gearbox. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a stop valve stem anti-rotation mechanism with a gear box, which solves the anti-rotation problem between the valve stem and the valve cover when the gear box is used to open and close the valve.

[0004] In order to solve the above technical problems, the utility model provides the following technical solutions: a stop valve stem anti-rotation mechanism with a gear box, including a valve cover guide rib, a stud, a nut, a valve stem and a guide block, wherein two valve cover guide ribs are provided, a valve stem is installed between the two valve cover guide ribs, two guide blocks are symmetrically installed on both sides of the valve stem, and the two guide blocks are fixed together by studs and nuts.

[0005] Based on the above solution, the two guide blocks are slidably fitted with the guide ribs of the valve cover.

[0006] Based on the above solution, two groups of studs and nuts are provided, and the two groups of studs and nuts are symmetrically mounted on the guide blocks, and the two guide blocks are pressed onto the valve stem through the studs and nuts.

[0007] Compared with the prior art, the utility model has the following beneficial effects: a valve stem anti-rotation mechanism for a stop valve with a gear box adopts a new structure to improve the existing gear box stop valve, and an anti-rotation structure is added on the valve stem and between the two valve cover guide ribs, which can ensure that the valve stem will not rotate when moving up and down. The utility model has a simple and reasonable structure, good anti-rotation effect, low production cost and strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 This is a schematic diagram of a stop valve structure with a stop valve stem anti-rotation mechanism with a gear box according to the utility model;

[0009] Figure 2 The utility model is a cross-sectional view of a stop valve stem anti-rotation mechanism with a gear box.

[0010] The numbers in the figure are: 1-valve cover guide rib, 2-stud, 3-nut, 4-valve stem, 5-guide block. DETAILED DESCRIPTION

[0011] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0012] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention.

[0013] Reference Figures 1 to 2 It can be seen that: a stop valve stem anti-rotation mechanism with a gear box includes a valve cover guide rib 1, a stud 2, a nut 3, a valve stem 4 and a guide block 5. There are two valve cover guide ribs 1, and a valve stem 4 is installed between the two valve cover guide ribs 1 (the valve stem 4 is an inherent structure on the stop valve and is an existing mature technology). Two guide blocks 5 are symmetrically installed on both sides of the valve stem 4, and the two guide blocks 5 are fixed together by studs 2 and nuts 3.

[0014] The two guide blocks 5 are slidably fitted with the valve cover guide rib 1 to facilitate the up and down movement of the valve stem 4; the studs 2 and nuts 3 are provided in two groups, and the two groups of studs 2 and nuts 3 are symmetrically mounted on the guide blocks 5, respectively. The two guide blocks 5 are pressed onto the valve stem 4 through the studs 2 and nuts 3, and the two guide blocks 5 are clamped and fixed on the valve stem 4 through the two groups of studs 2 and nuts 3, and will not rotate when the valve stem 4 moves up and down.

[0015] The principles and advantages of the utility model are as follows: a stop valve stem anti-rotation mechanism with a gear box. When the stop valve is opened and closed, the upper end of the stop valve is operated by the gear box, and the valve stem nut in the gear box rotates (this is an existing mature structure). The valve stem 4 will not rotate under the action of the two guide blocks 5, but will move up and down along the valve cover guide rib 1. The utility model has a simple and reasonable structure, good anti-rotation effect, low production cost, and is suitable for popularization and use.

[0016] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A stop valve stem anti-rotation mechanism with a gear box, comprising a valve cover guide rib (1), a stud (2), a nut (3), a valve stem (4) and a guide block (5), characterized in that: Two valve cover guide ribs (1) are provided, a valve stem (4) is installed between the two valve cover guide ribs (1), two guide blocks (5) are symmetrically installed on both sides of the valve stem (4), and the two guide blocks (5) are fixedly connected together by studs (2) and nuts (3).

2. A stop valve stem anti-rotation mechanism with a gear box according to claim 1, characterized in that: The two guide blocks (5) are in sliding engagement with the valve cover guide rib (1).

3. The stop valve stem anti-rotation mechanism with a gear box according to claim 1, characterized in that: The studs (2) and nuts (3) are provided in two groups, and the two groups of studs (2) and nuts (3) are symmetrically mounted on the guide blocks (5), respectively. The two guide blocks (5) are pressed onto the valve stem (4) through the studs (2) and nuts (3).

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