Valve rod of rod gate valve with adjustable height

Abstract

The utility model discloses a rod gate valve rod capable of adjusting height, which comprises a rod gate valve main body, a valve rod main body is arranged on the rod gate valve main body, a lifting connecting groove is arranged on the valve rod main body, a key groove is arranged on the inner surface of the lifting connecting groove, a connecting rod is arranged in the lifting connecting groove, and the connecting rod is connected with the key groove. A spline is connected to the outer surface of the connecting rod and arranged in the key groove, a first fixing support is arranged on the outer surface of the valve rod body, and a second fixing support is arranged on the outer surface of the connecting rod. According to the height-adjustable rod gate valve, the valve rod is provided with the limiting block, and the limiting block can limit the rotating ring under the combined action of the sliding rod and the telescopic spring, so that the rotating ring is prevented from rotating when not needed, and it is guaranteed that the rod gate valve does not change autonomously; the connecting rod in the valve rod body can be driven by the threaded rod to adjust the position, and therefore the height of the valve rod can be adjusted according to needs.

Description

Technical Field

[0001] The utility model relates to the technical field of a stem gate valve stem, in particular to a stem gate valve stem capable of adjusting the height. Background Art

[0002] The stem gate valve controls the opening or closing of the valve by displacing the valve stem with the valve plate, and controls the flow rate through the valve by adjusting the position of the valve stem.

[0003] In actual use, the height of the stem of the stem gate valve cannot be adjusted accordingly, which limits the application range of the stem. At the same time, the components that drive the stem do not have a limiting structure, which makes the position of the stem prone to unnecessary changes. Therefore, we propose a stem gate valve with adjustable height to solve the above problems. Utility Model Content

[0004] The purpose of the utility model is to provide a height-adjustable stem of a stem gate valve, so as to solve the problem raised by the above-mentioned background technology that the height of the stem of the stem gate valve on the market currently cannot be adjusted accordingly, so that the application scope of the stem is limited, and at the same time, the parts driving the stem do not have a limiting structure, so that the position of the stem is prone to unnecessary changes.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a height-adjustable stem of a stem gate valve, comprising a stem gate valve body, a stem gate valve body being provided on the stem gate valve body, a lifting connection groove being provided on the stem body, a key groove being provided on the inner surface of the lifting connection groove, a connecting rod being provided inside the lifting connection groove, a spline being connected to the outer surface of the connecting rod, and the spline being provided inside the key groove, a first fixing bracket being provided on the outer surface of the stem body, a second fixing bracket being provided on the outer surface of the connecting rod, and a threaded rod being connected between the first fixing bracket and the second fixing bracket.

[0006] Preferably, a rotating ring is provided on the main body of the rod gate valve, a fixed vertical plate is provided on one side of the rotating ring, a sliding rod is installed on the fixed vertical plate, the end of the sliding rod is connected to a limiting block, a telescopic spring is connected between the limiting block and the fixed vertical plate, a fixed rod is provided on the rotating ring, and a driving block is installed on the top of the fixed rod.

[0007] Preferably, the outer surface of the valve stem body is provided with a threaded structure, the valve stem body is slidably connected to the stem gate valve body, and the key groove is symmetrically arranged inside the lifting connection groove.

[0008] Preferably, the connecting rod and the lifting connecting groove are connected in a sliding manner, the spline and the connecting rod are connected in a fixed manner, and the spline and the key groove are connected in a sliding manner.

[0009] Preferably, the first fixed bracket is fixedly connected to the outer surface of the valve stem body, the second fixed bracket is fixedly connected to the outer surface of the connecting rod, the threaded rod is connected to the first fixed bracket by a bearing, and the threaded rod is connected to the second fixed bracket by a thread.

[0010] Preferably, the rotating ring and the stem gate valve body are connected by a bearing, the inner surface of the rotating ring is also provided with a threaded structure, the fixed vertical plate and the stem gate valve body are fixedly connected, the sliding rod and the fixed vertical plate are slidingly connected, the inner surface of the end of the limit block and the outer surface of the rotating ring are both provided with a toothed structure, the limit block and the rotating ring are meshingly connected, and the limit block and the sliding rod are fixedly connected.

[0011] Preferably, both ends of the telescopic spring are fixedly connected to the limit block and the fixed vertical plate respectively, the fixed rod is fixedly connected to the rotating ring, and the driving block is fixedly connected to the top end of the fixed rod.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows: the valve stem of the height-adjustable stem gate valve is provided with a limit block, and the limit block can limit the rotating ring under the joint action of the sliding rod and the telescopic spring, thereby preventing the rotating ring from rotating when it is not necessary, ensuring that the stem gate valve will not change autonomously, and the connecting rod inside the valve stem body can be adjusted in position under the drive of the threaded rod, so that the device can adjust the height of the valve stem as needed. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0014] Figure 2 This is a schematic diagram of the main structure of the utility model;

[0015] Figure 3 This is a schematic diagram of the main cross-sectional structure of the valve stem body of the utility model.

[0016] In the figure: 1. stem gate valve body; 2. rotating ring; 3. fixed vertical plate; 4. sliding rod; 5. limit block; 6. telescopic spring; 7. fixed rod; 8. driving block; 9. valve stem body; 10. lifting connecting groove; 11. keyway; 12. connecting rod; 13. spline; 14. first fixed bracket; 15. second fixed bracket; 16. threaded rod. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] See also Figure 1-3 The utility model provides a technical solution: a height-adjustable stem of a stem gate valve, comprising a stem gate valve body 1, a stem gate valve body 9 is arranged on the stem gate valve body 1, a lifting connection groove 10 is opened on the stem body 9, a key groove 11 is opened on the inner surface of the lifting connection groove 10, a connecting rod 12 is arranged inside the lifting connection groove 10, a spline 13 is connected to the outer surface of the connecting rod 12, and the spline 13 is arranged inside the key groove 11, a first fixing bracket 14 is arranged on the outer surface of the stem body 9, a second fixing bracket 15 is arranged on the outer surface of the connecting rod 12, and a threaded rod 16 is connected between the first fixing bracket 14 and the second fixing bracket 15.

[0019] A rotating ring 2 is provided on the stem gate valve body 1, a fixed vertical plate 3 is provided on one side of the rotating ring 2, a sliding rod 4 is installed on the fixed vertical plate 3, the end of the sliding rod 4 is connected to a limiting block 5, a telescopic spring 6 is connected between the limiting block 5 and the fixed vertical plate 3, a fixed rod 7 is provided on the rotating ring 2, and a driving block 8 is installed on the top of the fixed rod 7.

[0020] The outer surface of the valve stem body 9 is provided with a thread structure, the valve stem body 9 is slidably connected to the stem gate valve body 1 , and the key slots 11 are symmetrically arranged inside the lifting connection slots 10 .

[0021] The connecting rod 12 and the lifting connecting groove 10 are connected in a sliding manner, the spline 13 and the connecting rod 12 are connected in a fixed manner, and the spline 13 and the key groove 11 are connected in a sliding manner.

[0022] The first fixed bracket 14 is fixedly connected to the outer surface of the valve stem body 9 , the second fixed bracket 15 is fixedly connected to the outer surface of the connecting rod 12 , the threaded rod 16 is connected to the first fixed bracket 14 by a bearing, and the threaded rod 16 is connected to the second fixed bracket 15 by a thread.

[0023] The rotating ring 2 is connected to the stem gate valve body 1 by a bearing, and the inner surface of the rotating ring 2 is also provided with a threaded structure. The fixed vertical plate 3 is fixedly connected to the stem gate valve body 1, and the sliding rod 4 is slidably connected to the fixed vertical plate 3. The inner surface of the end of the limit block 5 and the outer surface of the rotating ring 2 are both provided with a toothed structure, and the limit block 5 and the rotating ring 2 are meshedly connected, and the limit block 5 and the sliding rod 4 are fixedly connected.

[0024] The two ends of the telescopic spring 6 are fixedly connected to the limit block 5 and the fixed vertical plate 3 respectively, the fixed rod 7 is fixedly connected to the rotating ring 2, and the driving block 8 is fixedly connected to the top of the fixed rod 7.

[0025] Working principle: When using the height-adjustable stem of the stem gate valve, first, when the height of the stem needs to be adjusted, the staff manually rotates the threaded rod 16, and the rotation of the threaded rod 16 drives the connecting rod 12 to move. After the height adjustment of the stem is completed, the parts required for the device are assembled. When it is necessary to control the rise or fall of the stem, the staff first pulls the sliding rod 4 outward to make the sliding rod 4 drive the limit block 5 to move, and the limit block 5 does not contact the rotating ring 2. Then, the rotating ring 2 is driven to rotate through the driving block 8 and the fixed rod 7. The rotation of the rotating ring 2 drives the connecting rod 12 to move up and down, so that the stem gate valve can be opened or closed. The above is the working process of the device, and the contents not described in detail in this specification belong to the existing technology known to professional and technical personnel in this field.

[0026] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A height-adjustable stem of a stem gate valve, comprising a stem gate valve body (1), characterized in that: The stem gate valve body (1) is provided with a valve stem body (9), a lifting connection groove (10) is provided on the valve stem body (9), a key groove (11) is provided on the inner surface of the lifting connection groove (10), a connecting rod (12) is provided inside the lifting connection groove (10), a spline (13) is connected to the outer surface of the connecting rod (12), and the spline (13) is arranged inside the key groove (11), a first fixing bracket (14) is provided on the outer surface of the valve stem body (9), a second fixing bracket (15) is provided on the outer surface of the connecting rod (12), and a threaded rod (16) is connected between the first fixing bracket (14) and the second fixing bracket (15).

2. The height-adjustable stem of a stem gate valve according to claim 1, characterized in that: The stem gate valve body (1) is provided with a rotating ring (2), a fixed vertical plate (3) is provided on one side of the rotating ring (2), a sliding rod (4) is installed on the fixed vertical plate (3), the end of the sliding rod (4) is connected to a limit block (5), a telescopic spring (6) is connected between the limit block (5) and the fixed vertical plate (3), the rotating ring (2) is provided with a fixed rod (7), and a driving block (8) is installed on the top end of the fixed rod (7).

3. The height-adjustable stem of a stem gate valve according to claim 1, characterized in that: The outer surface of the valve stem body (9) is provided with a threaded structure, the valve stem body (9) is slidably connected to the stem gate valve body (1), and the key groove (11) is symmetrically arranged inside the lifting connection groove (10).

4. The height-adjustable stem of a stem gate valve according to claim 1, characterized in that: The connecting rod (12) and the lifting connecting groove (10) are connected in a sliding manner, the spline (13) and the connecting rod (12) are connected in a fixed manner, and the spline (13) and the key groove (11) are connected in a sliding manner.

5. The height-adjustable stem of a stem gate valve according to claim 1, characterized in that: The first fixed bracket (14) is fixedly connected to the outer surface of the valve stem body (9), the second fixed bracket (15) is fixedly connected to the outer surface of the connecting rod (12), the threaded rod (16) is connected to the first fixed bracket (14) by a bearing, and the threaded rod (16) is connected to the second fixed bracket (15) by a thread.

6. The height-adjustable stem of a stem gate valve according to claim 2, characterized in that: The rotating ring (2) is connected to the stem gate valve body (1) by a bearing, and the inner surface of the rotating ring (2) is also provided with a threaded structure. The fixed vertical plate (3) is fixedly connected to the stem gate valve body (1), and the sliding rod (4) is slidably connected to the fixed vertical plate (3). The inner surface of the end of the limit block (5) and the outer surface of the rotating ring (2) are both provided with toothed structures, and the limit block (5) and the rotating ring (2) are meshedly connected, and the limit block (5) and the sliding rod (4) are fixedly connected.

7. The height-adjustable stem of a stem gate valve according to claim 2, characterized in that: The two ends of the telescopic spring (6) are respectively fixedly connected to the limit block (5) and the fixed vertical plate (3), the fixed rod (7) is fixedly connected to the rotating ring (2), and the driving block (8) is fixedly connected to the top end of the fixed rod (7).

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