Precise flow control ball valve

Abstract

The utility model discloses a precise flow control ball valve which comprises a valve body, a valve seat is arranged in the valve body, a valve ball is arranged on the valve seat, a through hole is formed in the valve ball in the axial direction in the reverse direction, and a channel matched with the through hole to form medium circulation is formed in the valve body. A valve rod extending into the valve body is arranged at the top end of the valve body, the valve rod is fixedly connected with the valve ball, a valve bottom cover is arranged at the bottom of the valve body, and a valve top cover is fixedly connected to the top of the valve body through a sealing piece; a flow control mechanism used for controlling the opening degree of the valve ball is arranged between the valve top cover and the valve rod. The flow control mechanism is arranged and comprises the ratchet wheel and the pawl, the tooth pitch of the ratchet wheel determines the rotating angle of the valve ball every time, the pawl is clamped into the corresponding tooth groove, it can be ensured that the opening degree of the valve ball is accurately adjusted in a stepping mode, and angle deviation caused by uneven force during manual operation is avoided.

Description

Technical Field

[0001] This utility model relates to the field of ball valve technology, and specifically to a precision flow control ball valve. Background Technology

[0002] In fluid control systems, ball valves are widely used in petrochemical, pharmaceutical, and water treatment industries due to their compact structure, low flow resistance, and excellent sealing performance. Traditional ball valves mostly use a manual knob or a valve stem without a positioning device to directly drive the valve ball. This makes it difficult for operators to precisely control the rotation angle of the valve ball, and uneven hand pressure or visual errors can easily lead to flow fluctuations.

[0003] Based on the above, this utility model proposes a precision flow control ball valve, which can effectively solve the above problems. Utility Model Content

[0004] This invention addresses the shortcomings of the existing technology by providing a precision flow control ball valve.

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

[0006] A precision flow control ball valve includes a valve body, a valve seat inside the valve body, a valve ball on the valve seat, a through hole in the valve ball in the opposite direction along the axial direction, and a channel for medium flow formed inside the valve body that cooperates with the through hole; a valve stem extending into the valve body is provided at the top of the valve body, the valve stem is fixedly connected to the valve ball, a valve bottom cover is provided at the bottom of the valve body, and a valve top cover is fixedly connected to the top of the valve body by a sealing element; a flow control mechanism for controlling the opening degree of the valve ball is provided between the valve top cover and the valve stem.

[0007] According to the above technical solution, as a further preferred technical solution, the flow control mechanism includes a ratchet and a pawl, the ratchet being fixedly connected to the outer surface of the valve stem; the pawl being fixedly connected to the bottom of the valve top cover via a fixed shaft.

[0008] According to the above technical solution, as a further preferred technical solution, sealing rings are provided between the valve body and the valve bottom cover, between the valve body and the sealing element, and between the valve top cover and the sealing element.

[0009] According to the above technical solution, as a further preferred technical solution, a rotating handle is fixedly connected to the top of the valve stem.

[0010] According to the above technical solution, as a further preferred technical solution, a packing, a metal ring and a sealing sleeve are arranged sequentially from bottom to top between the valve stem and the valve top cover.

[0011] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0012] This utility model provides a precision flow control ball valve. A flow control mechanism for controlling the valve ball opening is provided between the valve top cover and the valve stem. The flow control mechanism includes a ratchet and a pawl. The pitch of the ratchet's teeth determines the angle of each rotation of the valve ball. By engaging the pawl in the corresponding tooth groove, the valve ball opening can be precisely adjusted in steps, avoiding angle deviations caused by uneven force during manual operation. Simultaneously, after the pawl engages in the ratchet tooth groove, a rigid mechanical lock is formed, resisting external forces such as media pressure fluctuations and pipeline vibrations, preventing the valve ball from shifting its angle due to accidental force. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the flow control mechanism of this utility model. Detailed Implementation

[0015] To enable those skilled in the art to better understand the technical solution of this utility model, the preferred embodiments of this utility model are described below in conjunction with specific examples. However, it should be understood that the accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent. For better illustration of this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable that some well-known structures and their descriptions may be omitted in the drawings for those skilled in the art. The positional relationships described in the drawings are for illustrative purposes only and should not be construed as limiting this patent.

[0016] A precision flow control ball valve includes a valve body 1, a valve seat 2 inside the valve body 1, a valve ball 3 on the valve seat 2, and a through hole 301 formed in the axial direction of the valve ball 3. The valve body 1 has an internal channel 101 that mates with the through hole 301 to form a medium flow channel. A valve stem 4 extending into the valve body 1 is located at the top of the valve body 1 and is fixedly connected to the valve ball 3. A valve bottom cover 5 is located at the bottom of the valve body 1, and a valve top cover 7 is fixedly connected to the top of the valve body 1 via a sealing element 6. A flow control mechanism for controlling the opening degree of the valve ball 3 is provided between the valve top cover 7 and the valve stem 4. The flow control mechanism includes a ratchet 8 and a pawl 9. The ratchet 8 is fixedly connected to the outer surface of the valve stem 4, and the pawl 9 is fixedly connected to the bottom of the valve top cover 7 via a fixed shaft 10.

[0017] This invention features a flow control mechanism between the valve top cover 7 and the valve stem 4 to control the opening of the valve ball 3. The mechanism includes a ratchet 8 and a pawl 9. The tooth pitch of the ratchet 9 determines the angle of each rotation of the valve ball. By engaging the pawl 9 with the corresponding tooth groove, the opening of the valve ball 3 can be precisely adjusted in a stepwise manner, avoiding angle deviations caused by uneven force during manual operation. Simultaneously, when the pawl 9 engages with the tooth groove of the ratchet 8, a rigid mechanical lock is formed, resisting external forces such as medium pressure fluctuations and pipeline vibrations, preventing the valve ball 3 from shifting its angle due to accidental force.

[0018] Furthermore, in another embodiment, sealing rings 11 are provided between the valve body 1 and the valve bottom cover 5, between the valve body 1 and the sealing element 6, and between the valve top cover 7 and the sealing element 6.

[0019] By setting sealing rings 11 between valve body 1 and valve bottom cover 5, between valve body 1 and seal 6, and between valve top cover 7 and seal 6, a multi-seal structure is formed, which effectively enhances the sealing performance of each connection part of the valve. It is especially suitable for high pressure, high viscosity or corrosive media environments, reduces the risk of leakage, and extends the service life of the valve.

[0020] Furthermore, in another embodiment, a rotating handle 12 is fixedly connected to the top of the valve stem 4.

[0021] Furthermore, in another embodiment, a packing 13, a metal ring 14, and a sealing sleeve 15 are arranged sequentially from bottom to top between the valve stem 4 and the valve top cover 7.

[0022] Based on the description and accompanying drawings of this utility model, those skilled in the art can easily manufacture or use the precision flow control ball valve of this utility model, and can produce the positive effects described in this utility model.

[0023] Unless otherwise specified, in this utility model, terms such as "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used 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, the terms used to describe orientation or positional relationships in this utility model are for illustrative purposes only and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood in conjunction with the accompanying drawings and according to the specific circumstances.

[0024] Unless otherwise expressly specified and limited, the terms "set up," "connected," and "linked" in this utility model 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 direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A precision flow control ball valve, characterized in that: The valve body (1) includes a valve seat (2) inside the valve body (1), a valve ball (3) on the valve seat (2), a through hole (301) in the opposite direction along the axial direction of the valve ball (3), and a channel (101) for medium flow that cooperates with the through hole (301) inside the valve body (1). A valve stem (4) extending into the valve body (1) is provided at the top of the valve body (1), and the valve stem (4) is fixedly connected to the valve ball (3). A valve bottom cover (5) is provided at the bottom of the valve body (1), and a valve top cover (7) is fixedly connected to the top of the valve body (1) through a sealing element (6). A flow control mechanism for controlling the opening degree of the valve ball (3) is provided between the valve top cover (7) and the valve stem (4).

2. The precision flow control ball valve according to claim 1, characterized in that: The flow control mechanism includes a ratchet (8) and a pawl (9). The ratchet (8) is fixedly connected to the outer surface of the valve stem (4). The pawl (9) is fixedly connected to the bottom of the valve top cover (7) via a fixed shaft (10).

3. The precision flow control ball valve according to claim 1, characterized in that: A sealing ring (11) is provided between the valve body (1) and the valve bottom cover (5), between the valve body (1) and the sealing element (6), and between the valve top cover (7) and the sealing element (6).

4. The precision flow control ball valve according to claim 1, characterized in that: A rotating handle (12) is fixedly connected to the top of the valve stem (4).

5. A precision flow control ball valve according to claim 1, characterized in that: The valve stem (4) and the valve top cover (7) are provided with packing (13), metal ring (14) and sealing sleeve (15) from bottom to top.

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