Non-rising stem gate valve with opening degree indication

Abstract

According to the technical scheme, the non-rising stem gate valve is characterized in that the non-rising stem gate valve comprises a valve body, a valve rod and a valve plate, the valve rod is used for driving the valve plate to move up and down, the valve body comprises a valve seat and a valve deck, and the valve deck is detachably installed on the valve seat through a plurality of sets of bolts; a plugging cavity for the valve plate to move and an installation cavity for the valve rod to be installed are sequentially arranged in the valve seat in the height direction of the valve seat. The valve cover is provided with two groups of visible ports communicated with the mounting cavity, sealing glass is arranged at the visible ports, a mounting seat is connected in the mounting cavity in a sliding manner, and the mounting seat is in threaded connection with the valve rod; a first indicating piece and a second indicating piece are arranged on the two sides of the installation base respectively and correspond to the visible openings in the two sides respectively, and the opening or closing state of the non-rising stem gate valve can be known and perceived through the non-rising stem gate valve.

Description

Technical Field

[0001] This utility model relates to the field of valves, and more specifically, to a non-sunken gate valve with an opening degree indicator. Background Technology

[0002] A non-rising stem gate valve is a type of gate valve, with the counterpart being the rising stem gate valve. The biggest difference between the two lies in their appearance and structure. The structural feature of a non-rising stem gate valve is that both the valve stem and nut are inside the valve body. Because the valve stem thread is inside the valve body, the opening and closing status of a non-rising stem gate valve cannot be determined by observing the valve stem position as in a rising stem gate valve. Generally, the non-rising stem gate valve is opened until the valve stem can no longer be turned. However, considering special circumstances such as valve lock-up, to ensure pipeline safety, the valve is typically opened until the valve stem can no longer be turned, then rotated back 1-2 turns. Currently, most non-rising stem gate valves on the market lack stroke indicators, making it impossible to determine the valve's status during use, which can easily lead to misoperation and broken valve stems.

[0003] Therefore, an indicator structure capable of observing the opening degree of the gate valve is needed. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a non-opening stem gate valve with an opening degree indicator, which can understand and detect the opening or closing state of the non-opening stem gate valve.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a gate valve with an opening degree indicator, comprising a valve body, a valve stem, and a valve plate, wherein the valve stem is used to drive the valve plate to move up and down, and the valve body comprises a valve seat and a valve cover, wherein the valve cover is detachably installed on the valve seat by multiple sets of bolts;

[0006] The valve seat includes, along its height direction, a sealing cavity for moving the valve plate and an mounting cavity for installing the valve stem.

[0007] The valve cover is provided with two sets of viewing ports communicating with the mounting cavity. Each viewing port is provided with a sealing glass. A mounting seat is slidably connected inside the mounting cavity. The mounting seat is threadedly connected to the valve stem.

[0008] The mounting base is provided with a first indicator and a second indicator on both sides, and the first indicator and the second indicator are respectively provided with corresponding viewing ports on both sides.

[0009] The present invention is further configured such that: a first sliding groove and a second sliding groove are provided in the valve seat, one side of the first sliding groove and the second sliding groove are respectively connected to the mounting cavity, and the upper ends of the first sliding groove and the second sliding groove are respectively connected to the viewing port.

[0010] The present invention is further configured such that: a mounting cylinder is provided on one side of the mounting base, the mounting cylinder is slidably connected to the first sliding groove, a compression spring is provided inside the mounting cylinder, and the first indicator is slidably connected to the mounting cylinder and connected to the compression spring.

[0011] The present invention is further configured such that: the second indicator is fixedly installed on the other side of the mounting base and is slidably connected in the second sliding groove.

[0012] The present invention is further configured such that a first scale plate is provided in the first sliding groove.

[0013] The present invention is further configured such that a second scale plate is provided inside the second sliding groove.

[0014] The present invention is further configured such that: the valve stem is provided with a threaded structure on its periphery, the valve plate is threadedly connected to the valve stem, and the valve plate is provided with a movable cavity.

[0015] In summary, this utility model has the following beneficial effects: by observing the position of the first and second indicators through the visual port, the opening and closing status of the gate valve can be determined, thereby avoiding excessive rotation of the valve stem and causing accidents. Attached Figure Description

[0016] Figure 1 A three-dimensional structural diagram of a non-rising stem gate valve;

[0017] Figure 2 This is a cross-sectional view of a non-rising stem gate valve;

[0018] Figure 3 for Figure 2 Enlarged view of point A;

[0019] Figure 4 for Figure 2 Enlarged diagram of point B.

[0020] Reference numerals: 1. Valve body; 11. Valve seat; 12. Valve cover; 121. Visible port; 122. Sealing glass; 13. Bolt; 14. Sealing cavity; 15. Mounting cavity; 16. First sliding groove; 17. Second sliding groove; 2. Valve stem; 3. Valve plate; 4. Mounting base; 41. Mounting cylinder; 42. Compression spring; 5. First indicator; 6. Second indicator; 7. First scale plate; 8. Second scale plate. Detailed Implementation

[0021] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Identical components are indicated by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to directions in the accompanying drawings, and the terms "bottom surface," "top surface," "inner," and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0022] Reference Figures 1 to 4 As shown, in order to achieve the above objectives, the present invention provides the following technical solution: a gate valve with an opening degree indicator, comprising a valve body 1, a valve stem 2 and a valve plate 3, wherein the valve stem 2 is used to drive the valve plate 3 to move up and down, and the valve body 1 comprises a valve seat 11 and a valve cover 12, wherein the valve cover 12 is detachably installed on the valve seat 11 by means of multiple sets of bolts 13.

[0023] The valve seat 11 includes, along its height direction, a sealing cavity 14 for moving the valve plate 3 and an mounting cavity 15 for mounting the valve stem 2.

[0024] The valve cover 12 is provided with two sets of viewing ports 121 that communicate with the mounting cavity 15. A sealing glass 122 is provided at the viewing port 121. A mounting seat 4 is slidably connected in the mounting cavity 15. The mounting seat 4 is threadedly connected to the valve stem 2.

[0025] The mounting base 4 is provided with a first indicator 5 and a second indicator 6 on both sides, and the first indicator 5 and the second indicator 6 are respectively provided with corresponding viewing ports 121 on both sides.

[0026] The design of this utility model allows for the observation of the positions of the first indicator 5 and the second indicator 6 through the viewing port 121 to determine the opening and closing status of the gate valve, thereby avoiding excessive rotation of the valve stem 2 and causing accidents.

[0027] The design of the sealing glass 122 not only effectively ensures the sealing of the valve body 1, but also allows for easy observation of changes in the internal conditions.

[0028] This utility model is further configured such that: the valve stem 2 has a threaded structure on its circumference, the valve plate 3 is threadedly connected to the valve stem 2, and the valve plate 3 has a movable cavity inside. Because... Figure 2 The location of the movable cavity is not visible in the cross-sectional view. Therefore, the view in CN221120961U can be referenced. This structure is conventional prior art and will not be described in detail here.

[0029] The present invention is further configured such that: a first sliding groove 16 and a second sliding groove 17 are provided in the valve seat 11, one side of the first sliding groove 16 and the second sliding groove 17 are respectively connected to the mounting cavity 15, and the upper ends of the first sliding groove 16 and the second sliding groove 17 are respectively connected to the viewing port 121.

[0030] The present invention is further configured such that: a mounting cylinder 41 is provided on one side of the mounting base 4, the mounting cylinder 41 is slidably connected to the first sliding groove 16, a compression spring 42 is provided inside the mounting cylinder 41, and the first indicator 5 is slidably connected to the mounting cylinder 41 and connected to the compression spring 42.

[0031] The present invention is further configured such that: the second indicator 6 is fixedly installed on the other side of the mounting base 4 and is slidably connected in the second sliding groove 17.

[0032] like Figure 2 As shown, the first indicator 5 and the second indicator 6 are located on both sides of the valve stem 2, and are limited and slidably connected in the first sliding groove 16 and the second sliding groove 17. When the valve stem 2 rotates, the valve stem 2 and the mounting seat 4 cooperate to make the mounting seat 4 move along the axial direction of the valve stem 2.

[0033] The height of the first indicator 5 is higher than the height of the second indicator 6. When the valve stem 2 moves the mounting base 4 upward, the following steps will occur:

[0034] Assuming that during the opening and closing of the gate valve, the gate plate moves 20cm, the first indicator 5 moves 10cm upward, the second indicator 6 moves 20cm upward, and the viewing range of the viewing port 121 is 10cm deep.

[0035] When the mounting base 4 moves upward, the first indicator 5 will first approach the viewing port 121, so that the position of the first indicator 5 can be observed through the viewing port 121, thereby determining the opening status of the gate valve, until the opening stroke of 10cm is reached.

[0036] As the mounting base 4 continues to move upward, the first indicator 5 comes into contact with the sealing glass 122. At this time, the first indicator 5 will move into the mounting cylinder 41. The position of the second indicator 6 can be observed through another viewing port 121, thereby continuing to determine the opening status of the gate valve until it reaches 20cm, thus completing the opening.

[0037] Similarly, when the mounting base 4 moves downward, the second indicator 6 moves downward first, while the first indicator 5 extends out from the mounting cylinder 41. The mounting base 4 continues to move downward until the first indicator 5 moves to the designated area, completing the gate closure.

[0038] The design of this structure can divide the original one-span travel into two observation areas, thereby increasing the field of view and reducing the size of the opening of the viewing port 121.

[0039] It should be noted that when the scale lines need to be seen directly, the operator needs to look at the viewing port 121 at an angle, which results in a limited depth of vision.

[0040] The present invention is further configured such that a first scale plate 7 is provided inside the first sliding groove 16.

[0041] The present invention is further configured such that a second scale plate 8 is provided inside the second sliding groove 17.

[0042] For example, the first scale plate 7 records the range of 1~10cm; the second scale plate 8 records the range of 11~20cm.

[0043] Example 2: If the gate valve size changes, a third or fourth indicator can be designed.

[0044] The above are merely preferred embodiments of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are within its protection scope. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within its protection scope.

Claims

1. A gate valve with an opening degree indicator, comprising a valve body (1), a valve stem (2) and a valve plate (3), wherein the valve stem (2) is used to drive the valve plate (3) to move up and down, and the valve body (1) comprises a valve seat (11) and a valve cover (12), wherein the valve cover (12) is detachably mounted on the valve seat (11) by multiple sets of bolts (13); Its characteristics are: The valve seat (11) includes, along its height direction, a sealing cavity (14) for moving the valve plate (3) and an mounting cavity (15) for mounting the valve stem (2); The valve cover (12) is provided with two sets of viewing ports (121) communicating with the mounting cavity (15). A sealing glass (122) is provided at the viewing port (121). A mounting seat (4) is slidably connected in the mounting cavity (15). The mounting seat (4) is threadedly connected to the valve stem (2). The mounting base (4) is provided with a first indicator (5) and a second indicator (6) on both sides, and the first indicator (5) and the second indicator (6) are respectively provided with corresponding viewing ports (121) on both sides.

2. A gate valve with opening degree indication according to claim 1, characterized in that: The valve seat (11) is provided with a first sliding groove (16) and a second sliding groove (17). One side of the first sliding groove (16) and the second sliding groove (17) are respectively connected to the mounting cavity (15), and the upper ends of the first sliding groove (16) and the second sliding groove (17) are respectively connected to the viewing port (121).

3. A gate valve with opening degree indication according to claim 2, characterized in that: A mounting cylinder (41) is provided on one side of the mounting base (4). The mounting cylinder (41) is slidably connected to the first sliding groove (16). A compression spring (42) is provided inside the mounting cylinder (41). The first indicator (5) is slidably connected to the mounting cylinder (41) and is connected to the compression spring (42).

4. A gate valve with opening degree indication according to claim 3, characterized in that: The second indicator (6) is fixedly installed on the other side of the mounting base (4) and slidably connected in the second sliding groove (17).

5. A gate valve with opening degree indication according to claim 3, characterized in that: The first sliding groove (16) is provided with a first scale plate (7).

6. A gate valve with opening degree indication according to claim 4, characterized in that: The second sliding groove (17) is provided with a second scale plate (8).

7. A gate valve with opening degree indication according to any one of claims 1 to 6, characterized in that: The valve stem (2) has a threaded structure on its periphery, the valve plate (3) is threadedly connected to the valve stem (2), and the valve plate (3) has a movable cavity inside.

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