Lengthened rod gate valve with adjustable length

Abstract

The utility model relates to the technical field of gate valves, and discloses a length-adjustable extension rod gate valve which comprises a valve body, a valve rod and a valve plate, the upper end portion of the valve body is connected with an upper valve cover through a bolt, a grab rail is fixedly installed at the upper end portion of the valve rod, and the valve rod penetrates through the upper valve cover and is fixedly installed with the valve plate. A fixed rod and a movable rod are sequentially and fixedly installed on the upper end portion of the upper valve cover from bottom to top, the fixed rod comprises an outer sleeve, the outer sleeve is fixedly installed on the upper valve cover, the movable rod comprises a protective sleeve and an inner sleeve rod, the inner sleeve rod is arranged on the inner side of the protective sleeve, the protective sleeve and the inner sleeve rod are fixedly installed, and an operation panel is fixedly installed on the upper end portion of the movable rod. The outer sleeve and the inner sleeve rod are connected through threads, the valve rod comprises a lower end rod and an upper end rod, the lower end rod and the upper end rod are movably inserted into the outer sleeve and the inner sleeve rod respectively, and a limiting rod is arranged at the upper end of the lower end rod. According to the scheme, the adjusting operation of the valve rod cannot be affected, the length of the extension rod of the gate valve can be adjusted, and the deep burying installation requirement of the gate valve is better met.

Description

Technical Field

[0001] This utility model relates to the field of gate valve technology, specifically to an extended stem gate valve with adjustable length. Background Technology

[0002] Gate valves are characterized by low fluid resistance and a wide applicable pressure and temperature range, making them one of the most commonly used shut-off valves. Extended stem gate valves are widely used in industries such as petroleum, metallurgy, chemical, power, construction, heating, and water treatment. Ordinary stem gate valves, due to the limitation of stem length, cannot be installed in some confined spaces. Even if they can be installed, subsequent operations during normal gate valve operation are impossible, and on-site maintenance is difficult, affecting the service life of the gate valve.

[0003] Existing gate valves, when installed underground, require the construction of manholes and cannot be operated from the surface. While extended stem gate valves are available on the market, their packing devices are typically located on the bottom upper valve cover, making maintenance difficult and limiting the applicability of the extended stem. To address these issues, we propose an adjustable-length extended stem gate valve. Utility Model Content

[0004] The purpose of this utility model is to provide an adjustable length extended stem gate valve to solve the problems mentioned in the background art, such as the fact that the packing device of the existing gate valves and extended stem gate valves are all set on the bottom upper valve cover, which makes maintenance difficult and is not conducive to the adjustment of the length of the extended stem, and has a narrow range of applications.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an adjustable length extended rod gate valve, comprising a valve body, a valve stem, and a valve plate. An upper valve cover is bolted to the upper end of the valve body. A handle is fixedly installed at the upper end of the valve stem. The valve stem passes through the upper valve cover and is fixedly installed with the valve plate. A fixed rod and a movable rod are sequentially fixedly installed from bottom to top at the upper end of the upper valve cover. The valve stem and the movable rod are rotatably connected. The fixed rod includes an outer sleeve, which is fixedly installed on the upper valve cover. The movable rod includes a protective sleeve and an inner sleeve rod, with the inner sleeve rod located inside the protective sleeve. The protective sleeve and the inner sleeve rod are fixedly installed. An operating plate is fixedly installed at the upper end of the movable rod. The outer sleeve and the inner sleeve rod are connected by threads.

[0006] The valve stem includes a lower rod and an upper rod, which are movably inserted into the outer sleeve and inner sleeve, respectively. The upper end of the lower rod is provided with a limit rod, and the upper rod is provided with a limit groove for the limit rod to be inserted into. The limit rod is inserted into the limit groove. The lower end of the fixing rod is provided with a fixing seat, which is fixedly installed on the upper valve cover by bolts. The fixing seat and the valve stem are threaded together.

[0007] Preferably, the fixed rod and the movable rod are collinear, and both the fixed rod and the movable rod are located above the upper valve cover.

[0008] Preferably, the outer diameter of the protective sleeve is larger than the outer diameter of the fixing rod, and the protective sleeve is fitted onto the outside of the fixing rod.

[0009] Preferably, the lower end rod, the upper end rod, and the limiting rod are collinear.

[0010] Preferably, the inner sleeve rod has a through hole in the middle for inserting the upper end rod.

[0011] Preferably, the length of the limiting groove is greater than the length of the limiting rod.

[0012] Preferably, the operating panel has a slot for inserting the valve stem.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This type of adjustable-length extended stem gate valve divides the valve stem into an upper stem, a lower stem, and a limit stem. The upper and lower stems are respectively located inside the movable and fixed stems. When the operating panel is operated, the movable stem rotates. Through the threaded connection between the movable and fixed stems, the distance between the movable and fixed stems can be changed. During this process, the valve stem, which is rotatably connected to the movable stem, moves downwards or upwards, allowing the upper stem to continuously slide in and out of the lower stem without affecting the valve stem adjustment operation. This also allows for the adjustment of the extended stem length of the gate valve, better meeting the needs of deep-buried installation of the gate valve. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a schematic diagram of a half-section of the present invention;

[0017] Figure 3 For the present utility model Figure 2 Enlarged schematic diagram at point M;

[0018] Figure 4 This is a schematic diagram of the connection structure between the fixing rod and the valve stem of this utility model;

[0019] Figure 5 This is a schematic diagram of the connection structure between the movable rod and the valve stem of this utility model.

[0020] In the diagram: 1. Valve body; 2. Fixed rod; 20. Outer sleeve; 3. Movable rod; 30. Protective sleeve; 31. Inner sleeve rod; 32. Operating plate; 4. Upper valve cover; 5. Handrail rod; 6. Valve plate; 7. Valve stem; 71. Lower end rod; 72. Upper end rod; 73. Limiting rod; 74. Limiting groove; 8. Fixed seat. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Example: Please refer to Figure 1-5 This utility model provides a technical solution: an adjustable-length extended stem gate valve, mainly addressing the problems of existing gate valves where the packing device is located on the bottom upper valve cover, making maintenance difficult and hindering the adjustment of the extended stem length, thus limiting its applicability. The specific solution is as follows: it includes a valve body 1, a valve stem 7, and a valve plate 6. The upper end of the valve body 1 is bolted to an upper valve cover 4. A handle 5 is fixedly installed on the upper end of the valve stem 7. The valve stem 7 passes through the upper valve cover 4 and is fixedly installed with the valve plate 6. The valve plate 6 is located inside the valve body 1, and the upper valve cover 4 and the inner cavity of the valve body 1 are in communication.

[0023] Please see Figure 1 and Figure 2 In this system, a fixed rod 2 and a movable rod 3 are fixedly installed sequentially from bottom to top on the upper end of the upper valve cover 4. The valve stem 7 and the movable rod 3 are rotatably connected. The fixed rod 2 and the movable rod 3 are collinear, and both are located above the upper valve cover 4. The fixed rod 2 includes an outer sleeve 20, which is fixedly installed on the upper valve cover 4 and communicates internally with the upper valve cover 4. The movable rod 3 includes a protective sleeve 30 and an inner sleeve rod 31. The inner sleeve rod 31 is located inside the protective sleeve 30, and the protective sleeve 30 and the inner sleeve rod 31 are fixedly installed. The outer diameter of the protective sleeve 30 is larger than the outer diameter of the fixed rod 2, and the protective sleeve 30 is sleeved on the outside of the fixed rod 2.

[0024] Please see Figure 5An operating plate 32 is fixedly installed on the upper end of the movable rod 3. The outer sleeve 20 and the inner sleeve rod 31 are connected by threads. The operating plate 32 has a slot for the valve stem 7 to be inserted. The operating plate 32 has multiple outward-facing slots, which facilitate the operation of the operating plate 32. After the operating plate 32 is rotated, it can drive the movable rod 3 to rotate. Through the threaded connection between the movable rod 3 and the fixed rod 2, the distance between the movable rod 3 and the fixed rod 2 can be changed. Thus, the length of the gate valve extension rod can be adjusted as needed, making the gate valve more widely applicable.

[0025] Please see Figure 2 , Figure 4 and Figure 5 The valve stem 7 includes a lower stem 71 and an upper stem 72. A through hole for the upper stem 72 is provided in the middle of the inner sleeve 31. The lower stem 71 and the upper stem 72 are movably inserted into the outer sleeve 20 and the inner sleeve 31, respectively. A limiting rod 73 is provided at the upper end of the lower stem 71. The lower stem 71, the upper stem 72, and the limiting rod 73 are collinear. A limiting groove 74 is provided on the upper stem 72 for the limiting rod 73 to be inserted into. The limiting rod 73 is inserted into the limiting groove 74, and the length of the limiting groove 74 is greater than the length of the limiting rod 73. A fixing seat 8 is provided at the lower end of the fixing rod 2. The fixing seat 8 is fixedly installed on the upper valve cover 4 by bolts, and the fixing seat 8 and the valve stem 7 are threaded together. When the control panel 32 is operated, the movable rod 3 rotates. Through the threaded connection between the movable rod 3 and the fixed rod 2, the distance between the movable rod 3 and the fixed rod 2 can be changed. During this process, the valve stem 7, which is rotatably connected to the movable rod 3, moves from top to bottom or from bottom to top, so that the upper rod 71 is continuously inserted and withdrawn from the lower rod 72. This does not affect the adjustment operation of the valve stem 7, and it can also realize the length adjustment of the gate valve extension rod, which is worth promoting and using.

[0026] Working principle: This type of adjustable-length extended-rod gate valve, when used in deeply buried pipelines, allows for ground operation through the extended rod. Operating the control panel 32 causes the movable rod 3 to rotate. Through the threaded connection between the movable rod 3 and the fixed rod 2, the distance between the movable rod 3 and the fixed rod 2 can be changed. During this process, the valve stem 7, which is rotatably connected to the movable rod 3, moves downwards or upwards, causing the upper rod 71 to continuously slide in and out of the lower rod 72 without affecting the adjustment operation of the valve stem 7. It also allows for adjustment of the extended rod length, better meeting the needs of deep-buried gate valve installation.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An adjustable-length extended stem gate valve, comprising a valve body (1), a valve stem (7), and a valve plate (6), wherein an upper valve cover (4) is bolted to the upper end of the valve body (1), and a handle (5) is fixedly installed on the upper end of the valve stem (7), characterized in that: The valve stem (7) passes through the upper valve cover (4) and is fixedly installed with the valve plate (6). The upper end of the upper valve cover (4) is fixedly installed with a fixed rod (2) and a movable rod (3) from bottom to top. The valve stem (7) and the movable rod (3) are rotatably connected. The fixed rod (2) includes an outer sleeve (20). The outer sleeve (20) is fixedly installed on the upper valve cover (4). The movable rod (3) includes a protective sleeve (30) and an inner sleeve rod (31). The inner sleeve rod (31) is located inside the protective sleeve (30). The protective sleeve (30) and the inner sleeve rod (31) are fixedly installed. An operating plate (32) is fixedly installed at the upper end of the movable rod (3). The outer sleeve (20) and the inner sleeve rod (31) are connected by threads. The valve stem (7) includes a lower end rod (71) and an upper end rod (72). The lower end rod (71) and the upper end rod (72) are respectively movably inserted into the outer sleeve (20) and the inner sleeve rod (31). The upper end of the lower end rod (71) is provided with a limiting rod (73). The upper end rod (72) is provided with a limiting groove (74) for the limiting rod (73) to be inserted. The limiting rod (73) is inserted into the limiting groove (74). The lower end of the fixing rod (2) is provided with a fixing seat (8). The fixing seat (8) is fixedly installed on the upper valve cover (4) by bolts. The fixing seat (8) and the valve stem (7) are threadedly connected.

2. The adjustable-length extended stem gate valve according to claim 1, characterized in that: The fixed rod (2) and the movable rod (3) are collinear, and both the fixed rod (2) and the movable rod (3) are located above the upper valve cover (4).

3. The adjustable-length extended stem gate valve according to claim 1, characterized in that: The outer diameter of the protective sleeve (30) is larger than the outer diameter of the fixing rod (2), and the protective sleeve (30) is sleeved on the outside of the fixing rod (2).

4. The adjustable-length extended stem gate valve according to claim 1, characterized in that: The lower end rod (71), the upper end rod (72), and the limiting rod (73) are collinear.

5. The adjustable-length extended stem gate valve according to claim 1, characterized in that: The inner sleeve rod (31) has a through hole in the middle for the upper end rod (72) to be inserted.

6. The adjustable-length extended stem gate valve according to claim 1, characterized in that: The length of the limiting groove (74) is greater than the length of the limiting rod (73).

7. The adjustable-length extended stem gate valve according to claim 1, characterized in that: The operating plate (32) has a slot for inserting the valve stem (7).

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