Valve shaft structure and fluid valve

Abstract

The utility model provides a valve shaft structure and fluid valve belong to fluid valve field, including axle rod, first valve plate, second valve plate and isolation part, the first valve plate and at least one second valve plate are set up on axle rod, first valve plate is provided with first shaft sleeve and is installed on axle rod through first shaft sleeve, second valve plate is provided with second shaft sleeve and is installed on axle rod through second shaft sleeve, and the clearance is left between first shaft sleeve and second shaft sleeve, isolation part is set up on axle rod, and isolation part is set up in the clearance and is clamped between first shaft sleeve and second shaft sleeve, the utility model sets up the clearance between the shaft sleeve of two valve plates, and fills isolation part in the clearance, avoids two valve plates when counter rotating, and because of friction contact, the two shaft sleeves set up on axle rod between two shaft sleeves produce unexpected deflection, and through isolation part, the support of two shaft sleeves is formed in the clearance, avoids two valve plates when counter rotating, and the change of extrusion force between each other influences the sealing effect between two valve plates.

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 HVAC, water treatment, industrial process control, medical devices, and many other fields. Currently, some fluid control valves are beginning to adopt a double-acting valve plate design. This design uses mirror-sealed contact between the two valve plates, allowing for opposing or simultaneous rotation to control the opening and closing of multiple water supply paths and the synchronous regulation of the flow rate. However, this double-acting valve plate design has a problem: because the two valve plates are in mirror-sealed contact, when one valve plate is rotated, the other valve plate will also be rotated due to frictional contact, making it difficult to achieve precise synchronous control of different channels. Utility Model Content

[0003] In view of this, this utility model proposes a valve shaft structure and a fluid valve to solve the problem that the current double-acting valve plate design is difficult to achieve accurate synchronous control of different passages.

[0004] The technical solution of this utility model is implemented as follows: This utility model provides a valve shaft structure, including a shaft, a first valve plate, a second valve plate, and an isolation part; the first valve plate and at least one second valve plate are sleeved on the shaft; a first bushing is provided on the first valve plate and is installed on the shaft through the first bushing, and a second bushing is provided on the second valve plate and is installed on the shaft through the second bushing, with a gap between the first bushing and the second bushing; the isolation part is sleeved on the shaft, and the isolation part is disposed in the gap and sandwiched between the first bushing and the second bushing.

[0005] Based on the above technical solutions, preferably, the isolation part includes a support ring and a wear-resistant ring. The two support rings are sequentially sleeved on the shaft, and the two support rings are respectively tightly fitted to the first bushing and the second bushing; the wear-resistant ring is sleeved on the shaft and sandwiched between the two support rings.

[0006] In a further preferred embodiment, the outer peripheral wall of the shaft is symmetrically provided with slots, and the inner ring surface of the support ring is provided with a locking block. The locking block is locked in the slot and locks the support ring on the shaft and rotates synchronously with the shaft.

[0007] In a more preferred embodiment, the inner wall of the first bushing is also provided with a locking block, and the first bushing is locked to the shaft by the locking block and rotates synchronously with the shaft.

[0008] Based on the above technical solutions, preferably, the first valve plate further includes a first plate body connected to the outer peripheral wall of the first bushing; the second valve plate further includes a second plate body connected to the outer peripheral wall of the second bushing; when the first bushing rotates axially relative to the second bushing, the first plate body rotates relative to the second plate body.

[0009] In a further preferred embodiment, the first plate and the second plate are stacked together, and the first plate and the second plate are in mirror-sealed contact.

[0010] More preferably, the first plate and the second plate are located on the same plane, and the sides of the first plate and the second plate abut against each other.

[0011] More preferably, the first bushing and the first plate are not located on the same plane, so that a gap is formed between the first bushing and the second bushing.

[0012] More preferably, the thickness of the first bushing is less than the thickness of the first plate, so that a gap is formed between the first bushing and the second bushing.

[0013] On the other hand, this utility model also provides a fluid valve, which adopts the above-mentioned valve shaft structure and further includes a stationary plate. The stationary plate is sleeved on the shaft and coaxially arranged with the first shaft sleeve and the second shaft sleeve. The stationary plate is in mirror-sealed contact with the first valve plate or the second valve plate.

[0014] The valve shaft structure and fluid valve of this utility model have the following advantages over the prior art: (1) The present invention provides a gap between the bushings of the two valve plates and fills the gap with an isolation part to prevent the two bushings on the shaft from deflecting unexpectedly due to frictional contact when the two valve plates rotate. The isolation part provides support for the two bushings in the gap, preventing the change of the squeezing pressure between the two valve plates when they rotate and thus affecting the sealing effect between the two valve plates.

[0015] (2) In this utility model, the support ring is engaged with the groove of the shaft by the locking block, so that the support ring will not rotate relative to the shaft or the valve plate adjacent to it, thus avoiding the unexpected deflection caused by frictional contact between the support ring and the valve plate bushing. Attached Figure Description

[0016] 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.

[0017] Figure 1This is a perspective view of the valve shaft structure of this utility model; Figure 2 This is a three-dimensional exploded view of the valve shaft structure of this utility model; Figure 3 This is a three-dimensional exploded view of the valve shaft structure of this utility model, in which the two moving plates are arranged coplanarly; Figure 4 This is an exploded perspective view of another embodiment of the valve shaft structure of this utility model, in which the two moving pieces are stacked one on top of the other.

[0018] In the figure: 1. Shaft; 11. Clamping block; 101. Gap; 102. Slot; 2. First valve plate; 21. First bushing; 22. First plate body; 3. Second valve plate; 31. Second bushing; 32. Second plate body; 4. Isolation part; 41. Support ring; 42. Wear-resistant ring; 5. Static plate. Detailed Implementation

[0019] 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.

[0020] 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.

[0021] 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.

[0022] 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.

[0023] 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.

[0024] 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.

[0025] like Figure 1 As shown, combined with Figure 2 The present invention provides a valve shaft structure, comprising a shaft 1, a first valve plate 2, a second valve plate 3, and an isolation part 4.

[0026] A first valve plate 2 and at least one second valve plate 3 are sleeved on the shaft 1. The shaft 1 is the main drive shaft of the valve shaft structure, which provides driving force for the valve plate to rotate.

[0027] The first valve plate 2 is provided with a first bushing 21 and is mounted on the shaft 1 through the first bushing 21. The second valve plate 3 is provided with a second bushing 31 and is mounted on the shaft 1 through the second bushing 31. A gap 101 is left between the first bushing 21 and the second bushing 31. In essence, the first valve plate 2 and the second valve plate 3 have no functional difference; both are the main movable parts for adjusting the valve passage. However, in this embodiment, the first valve plate 2 mainly refers to the active valve plate that is fixed to the shaft 1 and driven to rotate by it, while the second valve plate 3 refers to other valve plates that follow the movement. Therefore, there can be more than one second valve plate 3. Theoretically, the first valve plate 2 and the second valve plate 3 should have a mirror fit when they are in operation, and there should be no frictional contact between them. However, in practice, since the two valve plates need to be sleeved on the shaft 1 through a bushing structure, there will be frictional contact when the two bushings come into contact. Therefore, when the first valve plate 2 rotates under the drive of the shaft 1, the first bushing 21 will also have frictional contact with the second bushing 31. This will cause the second bushing 31 to deflect and rotate with the first bushing 21 under the action of friction. This will cause the second valve plate 3 to deflect unexpectedly and affect the control accuracy of the second valve plate 3.

[0028] The isolation part 4 is sleeved on the shaft 1, and is disposed within the gap 101 and sandwiched between the first bushing 21 and the second bushing 31. Because the first bushing 21 and the second bushing 31 are isolated by the gap 101, they will not come into frictional contact, and therefore will not experience slight movement due to friction. However, the existence of the gap 101 creates a new problem: when the first valve plate 2 or the second valve plate 3 rotates on the shaft 1, the space formed by the gap 101 between the first bushing 21 and the second bushing 31 causes changes in the interaction force between the two valve plates, such as the counter-rotating pressure. This makes it difficult to maintain the stability of the interaction force during rotation, thus affecting the sealing contact effect between the two valve plates. Therefore, in this embodiment, an isolation portion 4 is filled within the gap 101 as a structural support. The isolation portion 4, sandwiched between the first bushing 21 and the second bushing 31, serves as a medium for transmitting the interaction force between the two valve plates. It not only provides support to the two valve plates, stabilizing their relative forces, but also acts as a buffer structure to prevent hard contact between the bushings of the two valve plates, thus avoiding interference with their rotation. In this embodiment, the isolation portion can be a single ring or a single piece, made of high-performance engineering plastics such as polytetrafluoroethylene (PTFE) or polyacetal. These materials possess both extremely high wear resistance and a very low coefficient of friction, thus meeting the requirements of this embodiment. However, the manufacturing cost of such materials is relatively high.

[0029] exist Figure 2In one embodiment shown, the isolation part 4 can also be implemented in a less costly manner. Specifically, the isolation part 4 includes a support ring 41 and a wear-resistant ring 42. The two support rings 41 are sequentially sleeved on the shaft 1, and the two support rings 41 are respectively tightly fitted to the first bushing 21 and the second bushing 31. The support rings 41 are generally metal rings, which have good structural strength and smooth surfaces, which can reduce the frictional resistance generated by the rotation of the bushings. The wear-resistant ring 42 is sleeved on the shaft 1 and sandwiched between the two support rings 41. The wear-resistant ring 42 can be a rubber ring or a ring made of composite ceramic material, which has good wear resistance and a certain deformation capacity, thereby buffering the interaction force generated when the two valve plates rotate against each other.

[0030] exist Figure 2 In one embodiment shown, symmetrical slots 102 are formed on the outer peripheral wall of the shaft 1. A locking block 11 is arranged around the inner annular surface of the support ring 41. The locking block 11 engages within the slot 102, locking the support ring 41 onto the shaft 1 and causing it to rotate synchronously with the shaft 1. For example, in this embodiment, four locking blocks 11 are arranged around the inner annular surface of the support ring 41, and these four locking blocks 11 respectively engage within the four slots 102 on the outer peripheral wall of the shaft 1. The shaft 1 and the support ring 41 can also be fixedly connected by a flat key or spline.

[0031] exist Figure 3 In one embodiment shown, a locking block 11 is also provided on the inner side wall of the first bushing 21. The first bushing 21 is locked to the shaft 1 by the locking block 11 and rotates synchronously with the shaft 1. The shaft 1 and the first bushing 21 can also be fixedly connected by a flat key or spline, so that the first valve plate 2 can rotate under the drive of the shaft 1, making the first valve plate 2 an active valve plate.

[0032] exist Figure 1 In one embodiment shown, the first valve plate 2 further includes a first plate body 22, which is connected to the outer peripheral wall of the first bushing 21; the second valve plate 3 further includes a second plate body 32, which is connected to the outer peripheral wall of the second bushing 31; when the first bushing 21 rotates axially relative to the second bushing 31, the first plate body 22 rotates relative to the second plate body 32. The first plate body 22 and the second plate body 32 are the main components for the two valve plates to realize the valve passage sealing function. The first plate body 22 and the second plate body 32 are plates with two flat surfaces, and at least one surface of each plate is generally a mirror-smooth surface, so that a mirror-smooth sealing contact can be formed between the first plate body 22 and the second plate body 32, or between the first plate body 22 and the stationary plate 5.

[0033] exist Figure 4In one embodiment shown, the first plate 22 and the second plate 32 are stacked and sealed in mirror-like contact. In this embodiment, the first valve plate 2 is a fan-shaped plate, while the second valve plate 3 is a complete circular plate. The first valve plate 2 and the second valve plate 3 are arranged front and back on the shaft 1, and the first plate 22 and the second plate 32 are tightly attached together. A first bushing 21 and a second bushing 31 are provided at the center of the first plate 22 and the second plate 32. The two opposite sides of the first bushing 21 and the second bushing 31 are respectively provided with recessed grooves. When the first plate 22 and the second plate 32 are stacked and tightly attached together, the two recessed grooves on the first bushing 21 and the second bushing 31 will form a gap 101. Valve holes are provided on the first plate 22 and the second plate 32.

[0034] exist Figure 3 In one embodiment shown, the first plate 22 and the second plate 32 are located on the same plane, and their sides abut against each other. In this embodiment, both the first valve plate 2 and the second valve plate 3 are non-circular plates. Although the first bushing 21 and the second bushing 31 of the first valve plate 2 and the second valve plate 3 are also arranged in a front-to-back manner on the shaft 1, the mirror surfaces of the first plate 22 and the second plate 32 are located on the same plane. Both the first plate 22 and the second plate 32 are fan-shaped plates, and they cooperate through side contact. At this time, the first bushing 21 and the second bushing 31 are set at the center position of the fan-shaped circle of the first plate 22 and the second plate 32, and no valve holes are opened on the first plate 22 and the second plate 32.

[0035] exist Figure 1 In one embodiment shown, the first bushing 21 and the first plate 22 are not located on the same plane, so that a gap 101 is formed between the first bushing 21 and the second bushing 31. In this embodiment, a concave boss is formed at the center of the first plate 22, and the boss structure is the first bushing 21, with the concave part of the boss forming the gap 101.

[0036] exist Figure 4 In one embodiment shown, the thickness of the first bushing 21 is less than the thickness of the first plate 22, creating a gap 101 between the first bushing 21 and the second bushing 31. In this embodiment, the first plate 22 can be considered as having a groove at its center, the first bushing 21 as the bottom structure of the groove, and the space enclosed by the groove forming the gap 101.

[0037] like Figure 1 As shown, combined with Figure 2This utility model discloses a fluid valve, employing the valve shaft structure of any of the above embodiments, and further includes a stationary plate 5. The stationary plate 5 is sleeved on the shaft 1 and coaxially arranged with the first bushing 21 and the second bushing 31. The main function of the stationary plate 5 is to cooperate with the first valve plate 2 or the second valve plate 3, or both simultaneously, to form a mirror-seal contact, thereby adjusting the state of each passage of the fluid valve. The stationary plate 5 is generally provided with a number of through holes equal to the number of output passages of the fluid valve. Theoretically, a gap 101 could be provided between the stationary plate 5 and the adjacent valve plate, and an isolation part 4 could be filled in. However, since the stationary plate 5 itself is fixed relative to the valve plate or the shaft 1, and the stationary plate 5 is not driven by any force to rotate, even if there is frictional contact between the part of the stationary plate 5 sleeved on the shaft 1 and the bushing of the valve plate, no unexpected deflection will occur, and there is no need to provide an isolation part 4.

[0038] 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 (1), a first valve plate (2), a second valve plate (3), and an isolation part (4); A first valve plate (2) and at least one second valve plate (3) are sleeved on the shaft (1). The first valve plate (2) is provided with a first bushing (21) and is mounted on the shaft (1) through the first bushing (21). The second valve plate (3) is provided with a second bushing (31) and is mounted on the shaft (1) through the second bushing (31). A gap (101) is left between the first bushing (21) and the second bushing (31). The isolation part (4) is sleeved on the shaft (1), and the isolation part (4) is disposed in the gap (101) and sandwiched between the first bushing (21) and the second bushing (31).

2. The valve shaft structure according to claim 1, characterized in that: The isolation part (4) includes a support ring (41) and a wear-resistant ring (42). The two support rings (41) are sequentially sleeved on the shaft (1), and the two support rings (41) are respectively tightly fitted to the first bushing (21) and the second bushing (31); The wear-resistant ring (42) is sleeved on the shaft (1) and sandwiched between the two support rings (41).

3. The valve shaft structure according to claim 2, characterized in that: The shaft (1) has symmetrical slots (102) on its outer peripheral wall. The inner ring of the support ring (41) is surrounded by a locking block (11). The locking block (11) is locked in the slot (102) and locks the support ring (41) on the shaft (1) and rotates synchronously with the shaft (1).

4. The valve shaft structure according to claim 3, characterized in that: The inner wall of the first bushing (21) is also provided with a locking block (11). The first bushing (21) is locked on the shaft (1) by the locking block (11) and rotates synchronously with the shaft (1).

5. A valve shaft structure according to claim 1, characterized in that: The first valve plate (2) further includes a first plate body (22), which is connected to the outer peripheral wall of the first bushing (21); the second valve plate (3) further includes a second plate body (32), which is connected to the outer peripheral wall of the second bushing (31); when the first bushing (21) rotates axially relative to the second bushing (31), the first plate body (22) rotates relative to the second plate body (32).

6. A valve shaft structure according to claim 5, characterized in that: The first plate (22) and the second plate (32) are stacked and sealed in a mirror-like manner.

7. A valve shaft structure according to claim 5, characterized in that: The first plate (22) and the second plate (32) are located on the same plane, and the sides of the first plate (22) and the second plate (32) abut against each other.

8. A valve shaft structure according to claim 6 or 7, characterized in that: The first bushing (21) and the first plate (22) are not located on the same plane, so that a gap (101) is formed between the first bushing (21) and the second bushing (31).

9. A valve shaft structure according to claim 6 or 7, characterized in that: The thickness of the first bushing (21) is less than the thickness of the first plate (22), so that a gap (101) is formed between the first bushing (21) and the second bushing (31).

10. A fluid valve, characterized in that: The valve shaft structure described in any one of claims 1 to 9 further includes a stationary plate (5). The stationary plate (5) is sleeved on the shaft (1) and coaxially arranged with the first bushing (21) and the second bushing (31). The stationary plate (5) is in mirror-sealed contact with the first valve plate (2) or the second valve plate (3).

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