A positioning accurate gate valve

Abstract

This utility model discloses a gate valve with accurate positioning, including a valve body, a liftable gate plate inside the valve body, and a valve cover fixed on the valve body. A frustum is connected to the upper side of the valve cover via a bracket, and a nut is rotatably connected inside the frustum. A handwheel is fixed on the nut, and a threaded rod threaded into the nut is fixed on the gate plate. A display cylinder is mounted on the nut. This utility model includes a display cylinder, allowing operators to accurately determine the height of the gate plate inside the valve body by observing the length of the threaded rod and comparing it with the reading in the display cylinder, which is helpful in determining the current maximum flow rate. The display cylinder can be inserted into the arc-shaped groove in the handwheel to act as an extension arm, facilitating the rotation of the handwheel in a stuck state. This utility model can also lock the handwheel acting as an extension arm to prevent it from dislodging.

Description

Technical Field

[0001] This utility model relates to the field of gate valve technology, and in particular to a gate valve with accurate positioning. Background Technology

[0002] A gate valve is a shut-off valve that controls fluid flow by a vertically moving gate. A rising stem gate valve is a type of gate valve, characterized by the visibility of the valve stem's movement. That is, when the valve is opened or closed, the valve stem moves up and down synchronously with the gate, and the position of the valve stem can be directly observed from the outside to determine the opening status.

[0003] Current rising stem gate valves have certain problems. For example, traditional rising stem gate valves rely on the operator to visually judge the opening by the exposed length of the valve stem, which may be subject to parallax or obstruction errors, and there is a risk of false full opening or false full closing. When false full opening or false full closing occurs, not only will the medium leak, but the high-speed fluid will also erode the sealing surface and damage the gate. Therefore, improvements are needed. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a gate valve with accurate positioning, thereby solving the problems mentioned in the background section.

[0005] This utility model provides the following technical solution: a gate valve with accurate positioning, including a valve body, a liftable gate plate provided in the valve body, and a valve cover fixed on the valve body. A frustum is connected to the upper side of the valve cover through a bracket, and a nut part is rotatably connected inside the frustum. A handwheel is fixed on the nut part, and a threaded rod threadedly connected to the nut part is fixed on the gate plate.

[0006] The nut portion is equipped with a display cylinder, which is sleeved on the threaded rod, and the display cylinder is engraved with increasing numbers from bottom to top.

[0007] Preferably, an observation groove is provided within the curved surface of the display cylinder, and the observation groove extends upward through the display cylinder.

[0008] Preferably, the handwheel includes an inner and outer intermediate disc and a hand ring, the intermediate disc is fixed to the outside of the nut portion, and the intermediate disc and the hand ring are connected by multiple connecting plates;

[0009] The outer curved surface of the handheld ring is provided with an arc-shaped groove, the shape of which is adapted to the part of the display cylinder that has the observation groove.

[0010] Preferably, the arcuate groove extends into one of the connecting plates.

[0011] Preferably, the lower end of the indicator cylinder is integrally formed with a sphere, and a flat surface that can adhere to the upper side of the nut portion is machined inside the sphere.

[0012] Preferably, an annular groove is provided in the plane inside the sphere, and a positioning ring that can be inserted into the annular groove is provided on the upper side of the nut. Preferably, it also includes a locking member, which includes a mounting plate fixed to the lower side of the connecting plate, a swing plate is hingedly installed in the hinge groove in the mounting plate, and a notch is provided on the lower side of the swing plate when it is completely in the hinge groove.

[0013] An arc-shaped plate that can be locked inside the notch is fixed in the observation slot.

[0014] Preferably, the mounting plate is also slidably connected to a support plate for locking the angle of the swing plate.

[0015] This utility model provides a gate valve with accurate positioning, which has the following advantages:

[0016] This utility model is equipped with a display cylinder. By observing the length of the threaded rod and comparing it with the reading inside the display cylinder, the operator can accurately determine the height of the gate plate inside the valve body, which is helpful in determining the current maximum flow rate of this utility model.

[0017] The indicator cylinder in this invention can be inserted into the arc-shaped groove in the handwheel to act as an extension arm, making it easier to rotate the handwheel when it is stuck.

[0018] This invention can also lock the handwheel that acts as an extension arm to prevent it from coming out. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the appearance of this utility model;

[0020] Figure 2 This is a schematic diagram of the appearance of the present invention after the display cylinder is inserted into the arc-shaped groove;

[0021] Figure 3 yes Figure 1 An illustration of the exterior from another perspective;

[0022] Figure 4 yes Figure 2 A schematic diagram of the appearance from another perspective.

[0023] In the picture:

[0024] 11. Valve body; 12. Valve cover; 13. Bracket; 14. Frustum; 15. Nut part; 16. Handwheel; 17. Threaded rod; 18. Indicator cylinder; 19. Observation slot; 20. Arc groove; 21. Ball; 22. Positioning ring; 31. Mounting plate; 32. Hinge groove; 33. Swing plate; 34. Notched groove; 35. Arc plate; 51. Intermediate plate; 52. Hand ring; 53. Connecting plate. Detailed Implementation

[0025] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0026] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0028] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] Reference Figures 1-4 According to an embodiment of the present invention, a gate valve with accurate positioning includes a valve body 11. The valve body 11 is provided with a gate that can be raised and lowered to control the opening and closing of the valve body 11. A valve cover 12 is fixed on the valve body 11. A frustum 14 is connected to the upper side of the valve cover 12 through a bracket 13. A nut part 15 is rotatably connected inside the frustum 14. A handwheel 16 is fixed on the nut part 15. A threaded rod 17 threadedly connected to the nut part 15 is fixed on the gate.

[0030] When the operator rotates the handwheel 16, the handwheel 16 will drive the nut part 15 to rotate, thereby driving the threaded rod 17 and the gate to move up and down, thus controlling whether the valve body 11 is opened or not.

[0031] Furthermore, the operator can determine the vertical position of the gate plate inside the valve body 11 based on the distance from the threaded rod 17 to the upper side of the nut portion 15, thereby controlling the flow rate. To ensure accurate distance determination, a display cylinder 18 is mounted on the nut portion 15. The display cylinder 18 is sleeved around the threaded rod 17, and the display cylinder 18 has readings that increase from bottom to top. In addition, an observation groove 19 is provided in the curved surface of the display cylinder 18, which extends upward through the display cylinder 18. The operator can observe the height of the threaded rod 17 inside the display cylinder 18 through the observation groove 19 and compare it with the reading.

[0032] In a second embodiment of the gate valve with accurate positioning, the indicator cylinder 18 also has a lever function. Specifically, the handwheel 16 includes an inner and outer intermediate disc 51 and a hand ring 52. The intermediate disc 51 is fixed to the outside of the nut part 15. The intermediate disc 51 and the hand ring 52 are connected by multiple connecting plates 53. The outer curved surface of the hand ring 52 is provided with an arc groove 20. The shape of the arc groove 20 is adapted to the part of the indicator cylinder 18 with the observation groove 19.

[0033] After the indicator cylinder 18 disengages from the nut portion 15, the upper end of the indicator cylinder 18 can be inserted into the arc-shaped groove 20 to act as an extension arm, and to make the handwheel 16 in the stuck state easier to rotate.

[0034] Furthermore, the arcuate groove 20 extends into one of the connecting plates 53, so that the display cylinder 18 can be inserted deeper into the arcuate groove 20 to increase the stability of this state.

[0035] In addition, the lower end of the indicator cylinder 18 is integrally formed with a ball 21. When the operator inserts the indicator cylinder 18 into the arc-shaped groove 20, the handwheel 16 can be rotated by holding the ball 21, which improves the grip and avoids relative sliding between the hand and the indicator cylinder 18. Furthermore, a flat surface is machined inside the ball 21 that can adhere to the upper side of the nut part 15.

[0036] In this second embodiment, the indicator cylinder 18 is detachable. To prevent the indicator cylinder 18 from tilting or tipping over when it is on the nut part 15, an annular groove is provided in the plane of the ball 21, and a positioning ring 22 that can be inserted into the annular groove is provided on the upper side of the nut part 15. When the indicator cylinder 18 is mounted on the nut part 15, the positioning ring 22 is inserted into the annular groove to lock the angle of the indicator cylinder 18, and the plane of the ball 21 is attached to the upper side of the nut part 15 to keep the indicator cylinder 18 vertical and avoid reading distortion.

[0037] In the third embodiment of the gate valve with accurate positioning, in order to lock the indicator cylinder 18 when it is inserted into the arc-shaped groove 20 and prevent it from falling off, a locking member is also included. The locking member includes a mounting plate 31 fixed to the lower side of the connecting plate 53. A swing plate 33 is hingedly installed in the hinge groove 32 in the mounting plate 31. When the swing plate 33 is completely in the hinge groove 32, a notch 34 is provided on its lower side. An arc-shaped plate 35 that can be locked in the notch 34 is fixed in the observation groove 19.

[0038] In addition, the mounting plate 31 is also slidably connected to a support plate 36 for locking the angle of the swing plate 33, such as... Figure 3 As shown, when the indicator cylinder 18 is on the nut part 15, the swing plate 33 is completely located in the hinge groove 32, and at this time the support plate 36 can abut against the lower edge of the swing plate 33 and lock it in the hinge groove 32.

[0039] like Figure 4 As shown, when the indicator cylinder 18 is inserted into the arc-shaped groove 20, the swing plate 33 can be flipped so that the arc-shaped plate 35 enters the notch 34. Then, the operator slides the support plate 36 to the right and supports it on the swing plate 33 so that the indicator cylinder 18 is completely locked.

[0040] It should be noted that there is a certain amount of friction between the support plate 36 and the mounting plate 31 to prevent them from sliding freely, ensuring the locking effect of the angle of the swing plate 33, and that it is in such a situation Figure 4 In the indicated state, the support plate 36 will be located to the right of the hinge point of the swing plate 33.

[0041] The above description is only a specific embodiment of the present utility model, but the technical features of the present utility model are not limited thereto. Any changes or modifications made by those skilled in the art within the scope of the present utility model are covered by the patent scope of the present utility model.

Claims

1. A gate valve with accurate positioning, comprising a valve body (11), wherein a liftable gate is provided inside the valve body (11), and a valve cover (12) is fixed on the valve body (11), characterized in that: The upper side of the valve cover (12) is connected to a frustum (14) via a bracket (13), and a nut (15) is rotatably connected inside the frustum (14). A handwheel (16) is fixed on the nut (15), and a threaded rod (17) threadedly connected to the nut (15) is fixed on the gate plate. The nut part (15) is equipped with a display cylinder (18), which is sleeved on the threaded rod (17), and the display cylinder (18) is engraved with an increasing number from bottom to top.

2. The gate valve with accurate positioning according to claim 1, characterized in that: An observation groove (19) is provided inside the curved surface of the display cylinder (18), and the observation groove (19) extends upward through the display cylinder (18).

3. A gate valve with accurate positioning according to claim 2, characterized in that: The handwheel (16) includes an inner and outer intermediate disc (51) and a hand ring (52). The intermediate disc (51) is fixed outside the nut part (15). The intermediate disc (51) and the hand ring (52) are connected by multiple connecting plates (53). The handheld ring (52) has an arc groove (20) inside its outer curved surface. The arc groove (20) is adapted to the part of the display cylinder (18) that has the observation groove (19).

4. A gate valve with accurate positioning according to claim 3, characterized in that: The arcuate groove (20) extends into one of the connecting plates (53).

5. A gate valve with accurate positioning according to claim 1 or 3, characterized in that: The lower end of the indicator cylinder (18) is integrally formed with a sphere (21), and a flat surface that can be attached to the upper side of the nut part (15) is machined inside the sphere (21).

6. A gate valve with accurate positioning according to claim 5, characterized in that: The sphere (21) has an annular groove in the plane, and the upper side of the nut (15) is provided with a positioning ring (22) that can be inserted into the annular groove.

7. A gate valve with accurate positioning according to claim 3, characterized in that: It also includes a locking component, which includes a mounting plate (31) fixed to the lower side of the connecting plate (53). A swing plate (33) is hingedly installed in the hinge groove (32) in the mounting plate (31). When the swing plate (33) is completely in the hinge groove (32), a notch (34) is provided on its lower side. The observation slot (19) is fixed with an arc-shaped plate (35) that can be locked in the notch (34).

8. A gate valve with accurate positioning according to claim 7, characterized in that: The mounting plate (31) is also slidably connected to a support plate (36) for locking the angle of the swing plate (33).

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