Continuous rotary ball valve

Abstract

The utility model discloses a kind of continuously rotating discharge ball valves, it includes ball valve body, hemispherical valve ball, lower fixed shaft, valve stem, left valve seat, right valve seat, left disc spring, right disc spring, elastic member and sealing system, hemispherical valve ball is rotatably located inside ball valve body, left valve seat and right valve seat are respectively adhered to and abut on the two sides of hemispherical valve ball, left disc spring is pressed between ball valve body and left valve seat, right disc spring is pressed between right valve seat and ball valve body, valve stem is rotatably connected in ball valve body, sealing system is pressed between the outer surface of valve stem and ball valve body, elastic member is pressed between the bottom of hemispherical valve ball and lower fixed shaft.Zero leakage is ensured by left disc spring and right disc spring, high safety, and reduce the sealing failure due to abrasion, reduce maintenance frequency and cost, realize long maintenance cycle, high reliability.

Description

Technical Field

[0001] This utility model relates to the field of fluid control equipment technology, and in particular to a continuous rotary discharge ball valve. Background Technology

[0002] Traditional ball valves, as quarter-turn valves (90-degree rotation), primarily function to switch between "open" and "closed" states to control the flow of fluid. However, in many continuous production processes (such as continuous feeding in reactors and uniform feeding in mixers), valves need to maintain a seal while achieving continuous and uniform material delivery. Traditional ball valves cannot meet this requirement.

[0003] Currently, to achieve continuous material discharge, equipment such as screw feeders and rotary valves are commonly used. However, these devices suffer from problems such as complex structure, poor sealing, easy jamming, and high maintenance costs. Therefore, there is an urgent need in this field for a new type of valve that can provide reliable sealing like a ball valve while also enabling continuous rotary material discharge. Utility Model Content

[0004] The purpose of this utility model is to overcome the above-mentioned shortcomings of the existing technology. This utility model provides a continuous rotary discharge ball valve.

[0005] This utility model is achieved through the following technical solution:

[0006] A continuous rotary discharge ball valve includes a ball valve body, a hemispherical valve ball, a lower fixed shaft, a valve stem, a left valve seat, a right valve seat, a left disc spring, a right disc spring, an elastic element, and a sealing system. The hemispherical valve ball is rotatably located inside the ball valve body. The left valve seat, the left disc spring, the right valve seat, and the right disc spring are all located inside the ball valve body, and the left and right valve seats respectively abut against the two sides of the hemispherical valve ball. The left disc spring is pressed between the ball valve body and the left valve seat, and the right disc spring is pressed between the right valve seat and the ball valve body. The valve stem is rotatably connected to the ball valve body and to the top of the hemispherical valve ball. The lower fixed shaft passes through the bottom of the ball valve body and is rotatably connected to the bottom of the hemispherical valve ball. The sealing system is pressed between the outer surface of the valve stem and the ball valve body. The elastic element is pressed between the bottom of the hemispherical valve ball and the lower fixed shaft.

[0007] Furthermore, the ball valve body includes a left valve body, a right valve body, an upper valve cover, and a lower valve cover. The left valve body is connected to one end of the upper valve cover and the lower valve cover, and the right valve body is connected to the other end of the upper valve cover and the lower valve cover, so that a valve cavity is formed between the left valve body, the right valve body, the upper valve cover, and the lower valve cover. The hemispherical valve ball is located in the valve cavity. The valve stem is rotatably connected to the upper valve cover. The bottom of the hemispherical valve ball has an upwardly recessed first mounting groove. The lower fixed shaft passes through the lower valve cover and is inserted into the first mounting groove. The elastic element is pressed between the top of the lower fixed shaft and the bottom of the first mounting groove.

[0008] Furthermore, the continuous rotary discharge ball valve also includes a first bearing, which is located in the first mounting groove and is disposed between the lower fixed shaft and the hemispherical valve ball.

[0009] Furthermore, a first valve seat groove is provided at one end of the left valve body facing the hemispherical valve ball, and the left disc spring and the left valve seat are arranged in the first valve seat groove along the axial direction of the left valve body, and the left disc spring applies an axial force to the left valve seat along the left valve body.

[0010] Furthermore, a second valve seat groove is provided at one end of the right valve body facing the hemispherical valve ball. The right valve seat and the right disc spring are arranged in the second valve seat groove along the axial direction of the right valve body, and the right disc spring applies an axial force to the right valve seat along the right valve body.

[0011] Furthermore, the sealing system includes a stuffing box, a valve stem packing, and a packing gland. The stuffing box is fitted onto the valve stem and connected to the top of the upper valve cover. The valve stem packing is pressed between the outer surface of the valve stem and the stuffing box. The packing gland is connected to the top of the stuffing box, and the bottom of the packing gland is pressed against the top of the valve stem packing.

[0012] Furthermore, the continuous rotary discharge ball valve also includes a second bearing, which is disposed between the stuffing box and the valve stem.

[0013] Furthermore, the continuous rotary discharge ball valve also includes a reverse sealing bearing, which is sleeved on the valve stem and located inside the stuffing box, and the reverse sealing bearing is located at the bottom end of the second bearing.

[0014] Furthermore, sealing gaskets are provided between the upper valve cover and the lower valve cover and the left valve body and the right valve body.

[0015] Furthermore, the continuous rotary discharge ball valve also includes a third bearing, the top of the hemispherical valve ball has a downwardly recessed second mounting groove, the valve stem is inserted into the second mounting groove, the third bearing is located in the second mounting groove, and the third bearing is disposed between the valve stem and the hemispherical valve ball;

[0016] And / or, the elastic element is a disc spring.

[0017] The beneficial effects of this utility model are as follows:

[0018] This invention relates to a continuous rotary discharge ball valve. Through left and right disc springs continuously applying axial force to the left and right valve seats respectively, the left and right valve seats are forced to remain tightly fitted against both sides of the hemispherical valve ball, ensuring zero leakage and high safety during continuous rotation. Furthermore, the automatic compensation capability of the left and right disc springs reduces seal failure caused by wear, lowering maintenance frequency and cost, resulting in a longer maintenance cycle and higher reliability. Simultaneously, the sealing system is pressed between the outer surface of the valve stem and the ball valve body, providing a seal. The elastic element provides a constant and automatically compensated clamping force to the hemispherical valve ball, valve stem, and sealing system, ensuring that the seal remains effective during valve stem rotation and effectively preventing media leakage along the valve stem axially. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the internal structure of the continuous rotary discharge ball valve according to an embodiment of the present invention.

[0020] Explanation of reference numerals in the attached figures:

[0021] hemispherical valve ball 1

[0022] Ball valve body 2

[0023] Left valve body 21

[0024] First valve seat groove 211

[0025] Right valve body 22

[0026] Second valve seat groove 221

[0027] Upper valve cover 23

[0028] Lower valve cover 24

[0029] Sealing gasket 25

[0030] Valve stem 3

[0031] Lower fixed shaft 4

[0032] Left valve seat 5

[0033] Right valve seat 6

[0034] Left disc spring 7

[0035] Right disc spring 8

[0036] Sealing system 9

[0037] Stuffing box 91

[0038] Valve stem packing 92

[0039] Packing gland 93

[0040] Elastic element 10

[0041] First bearing 11

[0042] Second bearing 12

[0043] Inverted seal bearing 13

[0044] Third bearing 14 Detailed Implementation

[0045] The following description of the embodiments is taken with reference to the accompanying drawings, which illustrate specific embodiments in which the present invention can be implemented.

[0046] like Figure 1 As shown, this embodiment discloses a continuous rotary discharge ball valve, which includes a hemispherical valve ball 1, a ball valve body 2, a valve stem 3, a lower fixed shaft 4, a left valve seat 5, a right valve seat 6, a left disc spring 7, a right disc spring 8, a sealing system 9, and an elastic element 10. The hemispherical valve ball 1 is rotatably located inside the ball valve body 2. The left valve seat 5, left disc spring 7, right valve seat 6, and right disc spring 8 are all located inside the ball valve body 2, with the left valve seat 5 and right valve seat 6 respectively abutting against the two sides of the hemispherical valve ball 1. The left disc spring 7 is pressed between the ball valve body 2 and the left valve seat 5, and the right disc spring 8 is pressed between the right valve seat 6 and the ball valve body 2. By continuously applying axial force to the left valve seat 5 and right valve seat 6 by the left disc spring 7 and right disc spring 8 respectively, the left valve seat 5 and right valve seat 6 are forced to always be tightly fitted against the two sides of the hemispherical valve ball 1, ensuring zero leakage of the continuous rotary discharge ball valve under continuous rotation conditions and high safety. Furthermore, the automatic compensation capabilities of the left disc spring 7 and the right disc spring 8 reduce seal failures caused by wear, lower maintenance frequency and costs, and achieve long maintenance cycles and high reliability.

[0047] The valve stem 3 is rotatably connected to the ball valve body 2 and is connected to the top of the hemispherical valve ball 1. The lower fixed shaft 4 passes through the bottom of the ball valve body 2 and is rotatably connected to the bottom of the hemispherical valve ball 1. The sealing system 9 is pressed between the outer surface of the valve stem 3 and the ball valve body 2, and the elastic element 10 is pressed between the bottom of the hemispherical valve ball 1 and the lower fixed shaft 4. The sealing system 9, pressed between the outer surface of the valve stem 3 and the ball valve body 2, provides a sealing effect, thereby effectively enhancing the sealing effect between the valve stem 3 and the ball valve body 2. The elastic element 10, pressed between the bottom of the hemispherical valve ball 1 and the lower fixed shaft 4, applies an axial force of the valve stem 3 to the hemispherical valve ball 1, providing a constant and automatically compensated clamping force to the hemispherical valve ball 1, the valve stem 3, and the sealing system 9. This ensures that the sealing system 9 remains effective when the valve stem 3 rotates, effectively preventing media leakage along the axial direction of the valve stem 3.

[0048] In this embodiment, the ball valve body 2 includes a left valve body 21, a right valve body 22, an upper valve cover 23, and a lower valve cover 24. The left valve body 21 is connected to one end of the upper valve cover 23 and the lower valve cover 24, and the right valve body 22 is connected to the other end of the upper valve cover 23 and the lower valve cover 24, so that a valve cavity is formed between the left valve body 21, the right valve body 22, the upper valve cover 23, and the lower valve cover 24. The hemispherical valve ball 1 is located in the valve cavity, and the valve stem 3 is rotatably connected to the upper valve cover 23. The bottom of the hemispherical valve ball 1 has a first mounting groove that is recessed upward. The lower fixed shaft 4 passes through the lower valve cover 24 and is inserted into the first mounting groove. The elastic element 10 is pressed between the top of the lower fixed shaft 4 and the bottom of the first mounting groove. The bottom of the hemispherical valve ball 1 is sleeved on the lower fixed shaft 4 through the first mounting groove, and the elastic element 10 is disposed in the first mounting groove and pressed between the hemispherical valve ball 1 and the lower fixed shaft 4, so as to achieve high stability of the structure. Furthermore, the ball valve body 2 is assembled from the left valve body 21, the right valve body 22, the upper valve cover 23, and the lower valve cover 24, making assembly convenient. Among them, the elastic element 10 is a disc spring, which has a simple structure and low cost.

[0049] Sealing gaskets 25 are provided between the upper valve cover 23 and the lower valve cover 24 and the left valve body 21 and the right valve body 22, respectively. Sealing gaskets 25 are provided at both ends of the upper valve cover 23 with the left valve body 21 and the right valve body 22, respectively, and sealing gaskets 25 are provided at both ends of the lower valve cover 24 with the left valve body 21 and the right valve body 22, respectively. The sealing gaskets 25 have a strengthening sealing effect, thereby effectively strengthening the sealing effect of the ball valve body 2 and further preventing leakage.

[0050] In this embodiment, the continuous rotary discharge ball valve, through the left disc spring 7 and the right disc spring 8, continuously applies axial force to the left valve seat 5 and the right valve seat 6 respectively, forcing the left valve seat 5 and the right valve seat 6 to always be tightly fitted to the hemispherical valve ball 1 to achieve a seal. When the valve ball rotates continuously, it can automatically compensate for the gap caused by wear or temperature changes, realize the main seal in the dynamic process, and prevent the medium from leaking downstream.

[0051] The elastic element 10, pressed between the bottom of the hemispherical valve ball 1 and the lower fixed shaft 4, applies an axial force of the valve stem 3 to the hemispherical valve ball 1. This provides a constant and automatically compensated clamping force to the sealing system 9, ensuring the packing seal remains effective during valve stem 3 rotation and preventing axial leakage of the medium along the valve stem 3. For multiple static seals, sealing gaskets are installed at all static mating surfaces, such as the valve body and base, and the valve body and each fixed shaft, forming multiple static sealing barriers to ensure the valve body is leak-free overall. This multi-seal design, combining dynamic and static elements, ensures bidirectional "zero leakage" of the continuous rotary discharge ball valve under continuous rotation conditions, resulting in high safety. The automatic compensation capability of the disc spring and elastic element reduces seal failure due to wear, lowers maintenance frequency and cost, and achieves long maintenance cycles and high reliability. Simultaneously, it enables highly precise and uniform flow control, meeting the stringent requirements of industries such as fine chemicals. Furthermore, it achieves revolutionary functionality, transforming the continuous rotary discharge ball valve from a simple "on / off" device into a device capable of "continuous metering and feeding," expanding the application areas of ball valves.

[0052] The continuous rotary discharge ball valve also includes a first bearing 11, which is located in a first mounting groove and positioned between the lower fixed shaft 4 and the hemispherical valve ball 1. Positioning the first bearing 11 in the first mounting groove facilitates installation and ensures high stability. Simultaneously, the first bearing 11 provides precise and stable support for the rotation of the hemispherical valve ball 1, ensuring concentricity and guaranteeing smooth operation of the continuous rotary discharge ball valve under continuous rotation, thus extending its service life.

[0053] A first valve seat groove 211 is provided at the end of the left valve body 21 facing the hemispherical valve ball 1. The left disc spring 7 and the left valve seat 5 are arranged in the first valve seat groove 211 along the axial direction of the left valve body 21, and the left disc spring 7 applies an axial force to the left valve seat 5 along the left valve body 21. By setting both the left disc spring 7 and the left valve seat 5 in the first valve seat groove 211, a high degree of structural stability is achieved through mutual cooperation. At the same time, the left disc spring 7 fits and abuts against the left valve body 21 and the left valve seat 5, thereby ensuring that the left valve seat 5 is tightly pressed against the left side of the hemispherical valve ball 1, effectively preventing leakage.

[0054] A second valve seat groove 221 is provided at the end of the right valve body 22 facing the hemispherical valve ball 1. The right valve seat 6 and the right disc spring 8 are arranged in the second valve seat groove 221 along the axial direction of the right valve body 22, and the right disc spring 8 applies an axial force to the right valve seat 6 along the right valve body 22. By placing both the right disc spring 8 and the right valve seat 6 in the second valve seat groove 221, a high degree of structural stability is achieved through their mutual cooperation. At the same time, the right disc spring 8 fits snugly against the right valve body 22 and the right valve seat 6, ensuring that the right valve seat 6 is tightly pressed against the right side of the hemispherical valve ball 1, thereby effectively preventing leakage.

[0055] The sealing system 9 includes a stuffing box 91, a stem packing 92, and a packing gland 93. The stuffing box 91 is fitted onto the valve stem 3 and connected to the top of the upper valve cover 23. The stem packing 92 is pressed between the outer surface of the valve stem 3 and the stuffing box 91. The packing gland 93 is connected to the top of the stuffing box 91, with its bottom pressing against the top of the stem packing 92. The stem packing 92 provides a seal, effectively preventing external leakage of the continuously rotating discharge ball valve during medium conveying. Simultaneously, the packing gland 93 is connected to the top of the upper valve cover 23 and presses against the stem packing 92, further enhancing the sealing effect by tightening the stem packing 92.

[0056] The continuous rotary discharge ball valve also includes a second bearing 12, which is located between the stuffing box 91 and the valve stem 3. The second bearing 12 provides precise and stable support for the rotation of the valve stem 3, ensuring concentricity and ensuring smooth operation of the continuous rotary discharge ball valve under continuous rotation, thus extending its service life.

[0057] The continuous rotary discharge ball valve also includes a reverse sealing bearing 13, which is sleeved on the valve stem 3 and located inside the stuffing box 91, and is situated at the bottom end of the second bearing 12. The reverse sealing bearing 13 is located between the second bearing 12 and the hemispherical valve ball 1. The reverse sealing bearing 13 ensures that the valve stem 3 will not be blown out of the upper valve cover 23 by the medium pressure, effectively preventing catastrophic accidents; it also provides stable support for the valve stem 3, greatly reducing the swaying caused by vibration, making operation smooth, and significantly improving the safety and stability of the continuous rotary discharge ball valve.

[0058] The continuous rotary discharge ball valve also includes a third bearing 14. The top of the hemispherical valve ball 1 has a downwardly recessed second mounting groove. The valve stem 3 is inserted into the second mounting groove, and the third bearing 14 is located within the second mounting groove, positioned between the valve stem 3 and the hemispherical valve ball 1. Placing the third bearing 14 within the second mounting groove facilitates installation and ensures high stability. Simultaneously, the third bearing 14 provides precise and stable support for the rotation of the hemispherical valve ball 1, ensuring concentricity and guaranteeing smooth operation of the continuous rotary discharge ball valve under continuous rotation, thus extending its service life.

[0059] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A continuous rotary discharge ball valve, characterized in that, It includes a ball valve body, a hemispherical valve ball, a lower fixed shaft, a valve stem, a left valve seat, a right valve seat, a left disc spring, a right disc spring, an elastic element, and a sealing system. The hemispherical valve ball is rotatably located inside the ball valve body. The left valve seat, the left disc spring, the right valve seat, and the right disc spring are all located inside the ball valve body, and the left and right valve seats respectively abut against the two sides of the hemispherical valve ball. The left disc spring is pressed between the ball valve body and the left valve seat, and the right disc spring is pressed between the right valve seat and the ball valve body. The valve stem is rotatably connected to the ball valve body and is connected to the top of the hemispherical valve ball. The lower fixed shaft passes through the bottom of the ball valve body and is rotatably connected to the bottom of the hemispherical valve ball. The sealing system is pressed between the outer surface of the valve stem and the ball valve body. The elastic element is pressed between the bottom of the hemispherical valve ball and the lower fixed shaft.

2. The continuous rotary discharge ball valve as described in claim 1, characterized in that, The ball valve body includes a left valve body, a right valve body, an upper valve cover, and a lower valve cover. The left valve body is connected to one end of the upper valve cover and the lower valve cover, and the right valve body is connected to the other end of the upper valve cover and the lower valve cover, so that a valve cavity is formed between the left valve body, the right valve body, the upper valve cover, and the lower valve cover. The hemispherical valve ball is located in the valve cavity. The valve stem is rotatably connected to the upper valve cover. The bottom of the hemispherical valve ball has an upwardly recessed first mounting groove. The lower fixed shaft passes through the lower valve cover and is inserted into the first mounting groove. The elastic element is pressed between the top of the lower fixed shaft and the bottom of the first mounting groove.

3. The continuous rotary discharge ball valve as described in claim 2, characterized in that, The continuous rotary discharge ball valve also includes a first bearing, which is located in the first mounting groove and is disposed between the lower fixed shaft and the hemispherical valve ball.

4. The continuous rotary discharge ball valve as described in claim 2, characterized in that, The left valve body has a first valve seat groove at one end facing the hemispherical valve ball. The left disc spring and the left valve seat are arranged in the first valve seat groove along the axial direction of the left valve body, and the left disc spring applies an axial force to the left valve seat along the left valve body.

5. The continuous rotary discharge ball valve as described in claim 2, characterized in that, The right valve body has a second valve seat groove at one end facing the hemispherical valve ball. The right valve seat and the right disc spring are arranged in the second valve seat groove along the axial direction of the right valve body, and the right disc spring applies an axial force to the right valve seat along the right valve body.

6. The continuous rotary discharge ball valve as described in claim 2, characterized in that, The sealing system includes a stuffing box, a valve stem packing, and a packing gland. The stuffing box is fitted onto the valve stem and connected to the top of the upper valve cover. The valve stem packing is pressed between the outer surface of the valve stem and the stuffing box. The packing gland is connected to the top of the stuffing box, and the bottom of the packing gland is pressed against the top of the valve stem packing.

7. The continuous rotary discharge ball valve as described in claim 6, characterized in that, The continuous rotary discharge ball valve also includes a second bearing, which is located between the stuffing box and the valve stem.

8. The continuous rotary discharge ball valve as described in claim 7, characterized in that, The continuous rotary discharge ball valve also includes a back seal bearing, which is sleeved on the valve stem and located inside the stuffing box, and the back seal bearing is located at the bottom end of the second bearing.

9. The continuous rotary discharge ball valve as described in claim 2, characterized in that, Sealing gaskets are provided between the upper valve cover and the lower valve cover and the left valve body and the right valve body.

10. The continuous rotary discharge ball valve as described in claim 1, characterized in that, The continuous rotary discharge ball valve also includes a third bearing. The top of the hemispherical valve ball has a downwardly recessed second mounting groove. The valve stem is inserted into the second mounting groove. The third bearing is located in the second mounting groove and is disposed between the valve stem and the hemispherical valve ball. And / or, the elastic element is a disc spring.

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