Segmented valve rod structure of floating ball valve

Abstract

The utility model discloses a floating ball valve sectional type valve rod structure which comprises an upper valve rod and a lower valve rod, the bottom end of the lower valve rod is fixedly connected to a valve clack, the valve clack is movably installed in a valve body, a sealing gasket is installed between the lower valve rod and the valve body, the upper end of the lower valve rod is installed in the valve body in a rotating mode, and the lower end of the lower valve rod is fixedly connected to the valve clack. The upper end of the lower valve rod is fixedly connected with an upper valve rod through threads, the upper end of the upper valve rod penetrates and is exposed out of the valve body, padding is fixedly installed between the outer ring of the upper valve rod and the valve body, a gland is installed above the padding and fixedly connected to the valve body through a gland bolt, and a positioning piece is arranged above the gland. The positioning piece is fixedly connected to the upper valve rod. The novel structure is adopted, the valve rod is arranged to be in a sectional type, the valve rod does not need to be installed from an inner cavity of the valve body when installed, therefore, the size of the valve body is reduced, the cost of the valve is reduced, and the sectional type valve is simple and reasonable in structure, convenient to install, low in manufacturing cost and high in practicability.

Description

Technical Field

[0001] The utility model relates to a valve stem, in particular to a segmented valve stem structure of a floating ball valve. Background Art

[0002] The floating ball valve has a simple structure and good sealing performance, and is widely used in the oil, gas and other industries. In the design of the floating ball valve, the valve stem is usually installed from the inner cavity of the valve body through the valve stem hole. In this case, the valve body cavity needs to have a large space to accommodate the valve stem, which will make the valve body size relatively large. For this reason, we propose a segmented valve stem structure for the floating ball valve. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a segmented valve stem structure of a floating ball valve, which solves the problem that the existing valve stem is usually installed from the inner cavity of the valve body into the valve stem hole, which requires a larger space in the inner cavity of the valve body to accommodate the valve stem passing through, making the valve body size relatively large.

[0004] In order to solve the above technical problems, the utility model provides the following technical solutions: a segmented valve stem structure of a floating ball valve, comprising an upper valve stem and a lower valve stem, the bottom end of the lower valve stem is fixedly connected to the valve disc, the valve disc is movably installed in the valve body, a sealing gasket is installed between the lower valve stem and the valve body, the upper end of the lower valve stem is rotatably installed in the valve body, the upper end of the lower valve stem is fixedly connected to the upper valve stem through a thread, the upper end of the upper valve stem penetrates and is exposed to the outside of the valve body, a packing is fixedly installed between the outer ring of the upper valve stem and the valve body, a gland is installed above the packing, the gland is fixedly connected to the valve body by a gland bolt, a positioning plate is provided above the gland, and the positioning plate is fixedly connected to the upper valve stem.

[0005] Based on the above solution, the gland is rotatably connected to the upper valve stem.

[0006] Based on the above solution, the sealing gasket is made of graphite material.

[0007] Based on the above solution, the filler is made of graphite material.

[0008] Based on the above solution, the top end of the upper valve stem is fixedly connected with a handle via a tightening bolt.

[0009] Compared with the prior art, the utility model has the following beneficial effects: a segmented valve stem structure of a floating ball valve, which adopts a new structure, improves the valve part, sets the valve stem into segments, and the valve stem does not need to be installed from the inner cavity of the valve body during installation, thereby reducing the valve body size and reducing the valve cost. The utility model has a simple and reasonable structure, is easy to install, has a low manufacturing cost, and is highly practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a structural schematic diagram of a segmented valve stem structure of a floating ball valve of the utility model;

[0011] Figure 2 This is a top view of a segmented valve stem structure of a floating ball valve of the utility model;

[0012] Figure 3 For this utility model Figure 1 Schematic diagram of the structure at A in the middle;

[0013] Figure 4 For this utility model Figure 1 Schematic diagram of the structure at point B in the middle.

[0014] The numbers in the figure are: 1-upper valve stem, 2-valve body, 3-lower valve stem, 4-gland, 5-gland bolt, 6-valve disc, 7-sealing gasket, 8-packing, 9-positioning plate, 10-handle, 11-tightening bolt. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0016] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships 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, and therefore should not be understood as a limitation on the present invention.

[0017] Reference Figures 1 to 4 It can be seen that: a floating ball valve segmented stem structure includes an upper valve stem 1 and a lower valve stem 3, the bottom end of the lower valve stem 3 is fixedly connected to the valve disc 6, the valve disc 6 is movably installed in the valve body 2, a sealing gasket 7 is installed between the lower valve stem 3 and the valve body 2, the upper end of the lower valve stem 3 is rotatably installed in the valve body 2, the upper end of the lower valve stem 3 is fixedly connected to the upper valve stem 1 by a thread, the upper end of the upper valve stem 1 penetrates and is exposed to the outside of the valve body 2, a packing 8 is fixedly installed between the outer ring of the upper valve stem 1 and the valve body 2, a gland 4 is installed above the packing 8, the gland 4 is fixedly connected to the valve body 2 by a gland bolt 5, a positioning piece 9 is provided above the gland 4, the positioning piece 9 is fixedly connected to the upper valve stem 1, and the positioning piece 9 is convenient for indicating and positioning the position of the valve stem after rotation.

[0018] The gland 4 is rotatably connected to the upper valve stem 1, which facilitates the upper valve stem 1 to rotate in the gland 4; the sealing gasket 7 is made of graphite material, and the filler 8 is made of graphite material. The graphite material has good wear resistance and sealing performance. The top of the upper valve stem 1 is fixedly connected to a handle 10 by a tightening bolt 11, and the handle 10 facilitates the rotation of the valve stem.

[0019] The principles and advantages of the utility model are as follows: a floating ball valve segmented stem structure, during installation, the valve stem 3 is fixedly installed on the valve disc 6, and then the lower valve stem 3 is installed into the valve stem hole in the inner cavity of the valve body 1, the upper valve stem 1 is screwed into the lower valve stem 3 from the valve stem hole at the top of the valve body 1, and is tightened and fixed, and then a packing 8 made of graphite material is installed, and the gland 4 is fixed to the valve body 1 through the gland bolt 5, and the gland bolt 5 is tightened to press the limit step on the gland 4 against the step at the upper end of the upper valve stem 1. The utility model has a simple and reasonable structure, is easy to install, reduces the size of the valve body 1, saves the manufacturing cost, and is suitable for popularization and use.

[0020] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A segmented valve stem structure of a floating ball valve, comprising an upper valve stem (1) and a lower valve stem (3), characterized in that: The bottom end of the lower valve stem (3) is fixedly connected to the valve disc (6), and the valve disc (6) is movably installed in the valve body (2). A sealing gasket (7) is installed between the lower valve stem (3) and the valve body (2). The upper end of the lower valve stem (3) is rotatably installed in the valve body (2). The upper end of the lower valve stem (3) is fixedly connected to the upper valve stem (1) through a thread. The upper end of the upper valve stem (1) penetrates and is exposed to the outside of the valve body (2). A packing (8) is fixedly installed between the outer ring of the upper valve stem (1) and the valve body (2). A gland (4) is installed above the packing (8). The gland (4) is fixedly connected to the valve body (2) through a gland bolt (5). A positioning plate (9) is provided above the gland (4), and the positioning plate (9) is fixedly connected to the upper valve stem (1).

2. A floating ball valve segmented stem structure according to claim 1, characterized in that: The gland (4) is rotatably connected to the upper valve stem (1).

3. The segmented valve stem structure of a floating ball valve according to claim 1, characterized in that: The sealing gasket (7) is made of graphite material.

4. The segmented valve stem structure of a floating ball valve according to claim 1, characterized in that: The filler (8) is made of graphite material.

5. The segmented valve stem structure of a floating ball valve according to claim 1, characterized in that: The top end of the upper valve stem (1) is fixedly connected to a handle (10) via a tightening bolt (11).

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