Valve shaft structure and fluid valve

Abstract

The utility model provides a valve shaft structure and fluid valve belong to fluid valve field, including the shaft head, the axle and the rotation piece, the shaft head sets up on the axial one end of axle, and the shaft head is with axle coaxial screw thread connection and synchronous axle rotation, the same two rotation pieces are arranged respectively on the end face of the shaft head far from the axle and the end face of the axle far from the shaft head, when the valve shaft structure sets up in the valve, through the same wrench rotation rotation piece, will be connected or from the axle, or will be connected or from the shaft head, the utility model discloses is arranged on the opposite ends of the shaft head and axle same rotation piece, makes the operator no matter from the shaft head one end or from the axle one end can two rotation pieces unscrew and dismount, and its two rotation pieces are same also can make the shaft head and axle can be disassembled through the same specification wrench tool, and the dismounting maintenance difficulty of valve shaft structure is reduced greatly.

Description

Technical Field

[0001] This utility model relates to the field of fluid valve technology, and in particular to a valve shaft structure and a fluid valve. Background Technology

[0002] Fluid valves are key components used to control the switching or distribution of fluids between multiple channels, and are widely used in many fields such as HVAC, water treatment, industrial process control, medical devices, and irrigation. Traditional fluid valves, such as plug valves or ball valves, typically achieve the opening and closing of the flow path by rotating a single valve core (such as a conical plug, cylindrical plug, or ball) to align or offset the flow passage holes on the valve body.

[0003] Fluid valves typically contain a valve shaft that connects to an actuator to drive the valve discs inside the valve body, thereby regulating the flow rate in the valve passage. To prevent the valve shaft from detaching from the valve body, its structure generally consists of a screw-connected shaft head and a shaft. During maintenance, the shaft head needs to be loosened with a wrench before being removed from the shaft. The shaft head can be installed either at the upward-facing end or the downward-facing end of the shaft. In some applications, the bottom of the valve body is very close to the ground; if the shaft head is installed at the lower end of the shaft, it can be difficult for the user to remove it with a wrench. Utility Model Content

[0004] In view of this, the present invention proposes a valve shaft structure and a fluid valve to solve the problem that it is difficult to disassemble the shaft head installed at the bottom of the valve body with a wrench when the bottom of the valve body is very close to the ground.

[0005] The technical solution of this utility model is implemented as follows: This utility model provides a valve shaft structure, including a shaft head, a shaft rod, and a rotating block. The shaft head is disposed on one end of the shaft rod in the axial direction. The shaft head and the shaft rod are coaxially threaded and rotate synchronously. Two identical rotating blocks are respectively disposed on the end face of the shaft head away from the shaft rod and the end face of the shaft rod away from the shaft head. When the valve shaft structure is disposed inside the valve, the shaft head is screwed tightly to the shaft rod or unscrewed from the shaft rod by rotating the rotating blocks with the same wrench, or the shaft rod is screwed tightly to the shaft head or unscrewed from the shaft head.

[0006] Based on the above technical solutions, preferably, the cross-sectional shape of the rotating block along the radial direction of the shaft is a long rectangle, the long side of the radial cross-section of the rotating block is a straight side, and the short side of the radial cross-section of the rotating block is a circular arc side.

[0007] Even more preferably, when the shaft and shaft head are screwed together, the two screw blocks are set in a mirror-symmetrical configuration.

[0008] More preferably, the end face of the rotating block located at the end of the valve shaft is provided with a socket, which is eccentrically set relative to the center of the rotating block, and is used to connect the output end of the valve actuator.

[0009] Even more preferably, a notch is provided on one of the short sides of the radial cross-section of the swivel block, and the notch is a foolproof design.

[0010] Even more preferably, notches are symmetrically opened on both short sides of the end face of the rotating block located at the end of the shaft head, and the notches are designed to prevent mistakenly.

[0011] More preferably, the notch and the insertion hole are respectively located at both ends of the long axis of the radial section of the rotating block.

[0012] Based on the above technical solutions, preferably, a threaded hole is provided in the center of the rotating block, and the threaded hole is used to externally install a handle on the rotating block.

[0013] In a further preferred embodiment, a groove is formed in the middle of the rotating block, a column is set in the center of the groove, and a threaded hole is formed in the column; a reinforcing ring is also set inside the groove, the reinforcing ring is sleeved outside the threaded hole, the outer edge of the reinforcing ring abuts against the inner edge of the groove, and a number of reinforcing ribs are connected between the inner edge of the reinforcing ring and the outer peripheral wall of the column, and the number of reinforcing ribs are arranged around the column.

[0014] On the other hand, this utility model also provides a fluid valve that adopts the above-mentioned valve shaft structure.

[0015] The valve shaft structure and fluid valve of this utility model have the following advantages over the prior art: (1) The present invention provides the same screw blocks on both ends of the shaft head and the shaft rod, so that the operator can loosen and disassemble them from either the shaft head end or the shaft rod end. The fact that the two screw blocks are the same also allows the shaft head and the shaft rod to be disassembled and assembled with the same wrench tool, which greatly reduces the difficulty of disassembling and maintaining the valve shaft structure.

[0016] (2) The present invention provides a socket, a threaded hole and a notch on the rotary block. The socket is used to connect with the output end of the actuator. The external handle can be fastened to the rotary block through the threaded hole so that the fluid valve can be operated manually. The notch is a foolproof design when the actuator, external handle or handle and other components are fitted on the rotary block, so that the personnel can quickly judge whether the interface is accurately fitted on the rotary block.

[0017] (3) The present invention sets the interior of the rotating block as a hollow structure, and strengthens the overall structural strength of the rotating block by setting a reinforcing ring in the groove, which greatly reduces the weight and production cost of the rotating block itself, while ensuring that the rotating block has sufficient structural strength when driven by external force to rotate. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a perspective view of the valve shaft structure of this utility model; Figure 2 This is a perspective view of the valve shaft structure of this utility model from another angle. Figure 3 This is a top view of the shaft head of this utility model.

[0020] In the diagram: 1. Shaft head; 2. Shaft rod; 3. Rotary block; 31. Column; 32. Reinforcing ring; 33. Reinforcing rib; 301. Insertion hole; 302. Notch; 303. Threaded hole; 304. Groove; 4. Moving piece. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0022] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention based on the specific circumstances.

[0023] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "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 the embodiments of the present invention 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 the embodiments of the present invention.

[0024] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0025] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. 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] The following disclosure provides numerous different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. Additionally, examples of various specific processes and materials are provided in this invention; however, those skilled in the art will recognize the applicability of other processes and / or the use of other materials.

[0027] like Figure 1 As shown, combined with Figure 2 and Figure 3 The present invention provides a valve shaft structure, comprising a shaft head 1, a shaft rod 2, and a rotating block 3.

[0028] The shaft head 1 is located on one axial end of the shaft rod 2. The shaft head 1 and the shaft rod 2 are coaxially threaded together. After they are tightened, they form a valve shaft and rotate synchronously to drive the moving plate 4 on it to rotate. In the existing valve shaft structure, the shaft head 1 is similar to a nut, so a hexagonal block or other shaped block is set on it so that the handle can be clamped to rotate the shaft head 1.

[0029] However, in this example, the two identical screw blocks 3 are respectively located on the end face of the shaft head 1 away from the shaft rod 2 and on the end face of the shaft rod 2 away from the shaft head 1. The advantage is that, regardless of whether the shaft head 1 is located at the bottom or top of the valve body, the screw block 3 located at the top of the valve body can be held by the handle. This screw block 3 may be on the shaft head 1 or on the shaft rod 2. Then, the handle can be rotated to loosen or tighten the shaft head 1 and the shaft rod 2. Then, any damaged part of either of them can be replaced or maintained. When the valve shaft structure is located inside the valve, since the two screw blocks 3 are the same block, the same type of wrench can be used to rotate the screw blocks 3 to tighten the connection between the shaft head 1 and the shaft rod 2 or unscrew it from the shaft rod 2, or to tighten the connection between the shaft rod 2 and the shaft head 1 or unscrew it from the shaft head 1, which greatly reduces the difficulty of disassembling and maintaining the valve shaft structure.

[0030] exist Figure 1 In one embodiment shown, the radial cross-sectional shape of the rotating block 3 along the shaft 2 is a long rectangle, with the long side of the radial cross-section of the rotating block 3 being a straight side and the short side being a rounded side. The rotating block 3 can also be elliptical, hexagonal, quadrilateral, or other shapes, but the long rectangle has two long straight sides, allowing the handle to be more securely locked onto the rotating block 3. Alternatively, a special wrench can be designed with an interface at its end having a long rectangular slot. After the rotating block 3 is tightly fitted through the interface, the wrench is rotated to rotate the rotating block 3.

[0031] exist Figure 2 In one embodiment shown, when the shaft 2 is tightened with the shaft head 1, the two rotating blocks 3 are arranged in a mirror symmetrical manner. At this time, the cross-sectional shapes of the two rotating blocks 3 along the radial direction of the valve shaft are completely overlapping. If it is necessary to use a wrench to disassemble the shaft head 1 located at the bottom of the valve body, the shape of the bottom rotating block 3 can be determined according to the shape of the rotating block 3 at the top of the shaft 2, so that the wrench can easily hold the bottom rotating block 3.

[0032] exist Figure 3 In one embodiment shown, a socket 301 is provided on the end face of the rotating block 3 located at the end of the valve shaft. The socket 301 is eccentrically positioned relative to the center of the rotating block 3 and is used to connect the output end of the valve actuator. When the fluid valve is controlled by the actuator, the end of its output shaft is inserted into the socket 301. A flat key or spline structure is provided at the bottom of the socket 301 to restrict the rotation of the end of the actuator output shaft within the socket 301. The eccentric positioning of the socket 301 and the rotating block 3 creates a rotational torque between the end of the actuator output shaft and the valve shaft axis, thereby enabling the actuator to drive the valve shaft structure to rotate.

[0033] exist Figure 3In one embodiment shown, a notch 302 is provided on one of the short sides of the radial cross-section of the rotary block 3. The notch 302 is a foolproof design. For example, when the aforementioned wrench with a slot is placed on the rotary block 3, a locking block corresponding to the notch 302 is also provided inside the slot. By cooperating with the locking block, the operator can quickly align the slot of the wrench with the rotary block 3 for placement. At the same time, the notch 302 and the locking block engage. When the operating handle drives the rotary block 3 and drives the entire valve shaft to rotate, the engagement of the notch 302 and the locking block can improve the connection stability between the wrench and the rotary block 3.

[0034] exist Figure 2 In one embodiment shown, notches 302 are symmetrically provided on both short sides of the end face of the rotating block 3 located at the end of the shaft head 1. The notches 302 are designed to prevent mistaken connection. Since the valve shaft end where the shaft head 1 is located is generally not used to connect the actuator, two notches 302 can be symmetrically provided on the rotating block 3 of the shaft head 1, and their functions are the same.

[0035] exist Figure 3 In one embodiment shown, the notch 302 and the insertion hole 301 are respectively provided at both ends of the long axis of the radial section of the rotating block 3, so that the rotating block 3 has a foolproof design at the same time, without affecting the connection between the rotating block 3 and the actuator output end.

[0036] exist Figure 3 In one embodiment shown, the rotating block 3 has a threaded hole 303 at its center. The threaded hole 303 is used to attach a handle to the rotating block 3, allowing a person to manually rotate the valve shaft structure using the external handle. For example, when using the aforementioned wrench with a slot, after the wrench's slot is fitted onto the rotating block 3, a through hole can be opened at the bottom of the wrench's slot. Then, a fastening bolt is passed through the through hole and screwed into the threaded hole 303, thereby fixing the wrench onto the rotating block 3 for use as an external handle.

[0037] exist Figure 3 In one embodiment shown, a groove 304 is formed in the middle of the rotating block 3, and a column 31 is set at the center of the groove 304. A threaded hole 303 is formed in the column 31, which greatly reduces the weight of the rotating block 3 and reduces the production cost of the valve shaft. Since the weight of the rotating block 3 is reduced, the driving force required for the actuator to drive the rotating block 3 to rotate can be appropriately reduced, thereby reducing the cost of use. However, the hollow interior of the rotating block 3 will weaken the structural strength of the rotating block 3 itself. Therefore, in this embodiment, a reinforcing ring 32 is also provided inside the groove 304. The reinforcing ring 32 is sleeved outside the threaded hole 303, and the outer edge of the reinforcing ring 32 abuts against the inner edge of the groove 304. A number of reinforcing ribs 33 are connected between the inner edge of the reinforcing ring 32 and the outer peripheral wall of the column 31. The number of reinforcing ribs 33 are arranged around the column 31. The reinforcing ring 32 and the multiple reinforcing ribs 33 surround the column 31 in a structure similar to a bullseye, which effectively improves the overall structural strength of the rotating block 3.

[0038] like Figure 1 As shown, combined with Figure 2 and Figure 3 The fluid valve of this utility model adopts the valve shaft structure of any of the above embodiments, and further includes a valve body, a stationary plate and a moving plate 4. The valve shaft structure, the stationary plate and the moving plate 4 are all installed inside the valve body. The stationary plate is fixed and stationary, and the moving plate 4 is fixedly sleeved on the valve shaft structure and driven to rotate synchronously. The moving plate 4 will make mirror-sealed contact with the stationary plate and rotate relative to the stationary plate, thereby realizing the control of the flow rate of the valve passage.

[0039] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A valve shaft structure, characterized in that: It includes a shaft head (1), a shaft rod (2), and a rotating block (3). The shaft head (1) is located on one end of the shaft (2) along the axial direction. The shaft head (1) is coaxially threaded with the shaft (2) and rotates synchronously. The two identical rotating blocks (3) are respectively set on the end face of the shaft head (1) away from the shaft rod (2) and the end face of the shaft rod (2) away from the shaft head (1); When the valve shaft structure is installed inside the valve, the same wrench is used to rotate the screw block (3) to tighten the connection between the shaft head (1) and the shaft rod (2) or to unscrew the shaft rod (2), or to tighten the connection between the shaft rod (2) and the shaft head (1) or to unscrew the shaft head (1).

2. The valve shaft structure according to claim 1, characterized in that: The cross-sectional shape of the rotating block (3) along the radial direction of the shaft (2) is a long rectangle. The long side of the radial cross-section of the rotating block (3) is a straight side, and the short side of the radial cross-section of the rotating block (3) is a circular arc side.

3. The valve shaft structure according to claim 2, characterized in that: When the shaft (2) is screwed to the shaft head (1), the two screw blocks (3) are arranged in a mirror symmetrical manner.

4. The valve shaft structure according to claim 2, characterized in that: A socket (301) is provided on the end face of the rotating block (3) located at the end of the valve shaft. The socket (301) is eccentrically positioned relative to the center of the rotating block (3). The socket (301) is used to connect the output end of the valve actuator.

5. A valve shaft structure according to claim 4, characterized in that: The radial section of the rotating block (3) has a notch (302) on one of the short sides, and the notch (302) is designed to prevent mistakes.

6. A valve shaft structure according to claim 4, characterized in that: Notches (302) are symmetrically provided on the short sides of the end face of the rotating block (3) located at the end of the shaft head (1). The notches (302) are designed to prevent mistakes.

7. A valve shaft structure according to claim 5, characterized in that: The notch (302) and the insertion hole (301) are respectively located at both ends of the long axis of the radial section of the rotating block (3).

8. A valve shaft structure according to claim 1, characterized in that: The center of the rotating block (3) is provided with a threaded hole (303), which is used to attach a handle to the rotating block (3).

9. A valve shaft structure according to claim 8, characterized in that: The rotating block (3) has a groove (304) in the middle, and a column (31) is provided in the center of the groove (304). A threaded hole (303) is provided in the column (31). A reinforcing ring (32) is also provided inside the groove (304). The reinforcing ring (32) is sleeved outside the threaded hole (303). The outer edge of the reinforcing ring (32) abuts against the inner edge of the groove (304). A number of reinforcing ribs (33) are connected between the inner edge of the reinforcing ring (32) and the outer peripheral wall of the column (31). The number of reinforcing ribs (33) are arranged around the column (31).

10. A fluid valve, characterized in that: The valve shaft structure described in any one of claims 1 to 9 is adopted.

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