CN113915347B - A pilot ball valve - Google Patents

Abstract

The present invention discloses a pilot ball valve, including a pilot ball valve, including: a main valve assembly, a pilot valve assembly, and a drive assembly, wherein the main valve assembly includes a valve body, a valve cover, a main valve ball, a main valve seat, and a valve ball straightening sleeve, wherein the main valve assembly is used to control the switch of a water valve, wherein the pilot valve assembly includes a pilot valve stem, a pilot valve stem sealing body, a pilot valve sleeve, a pilot valve ball, and a pilot valve seat, wherein the pilot valve assembly is used to control the switch of the main valve assembly, and wherein the drive assembly is used to drive the pilot valve assembly. The pilot ball valve solves the problem that the water valve is easy to be blocked and worn, improves the anti-fouling property and service life, and at the same time retains the advantage of fast switch response speed.

Description

A pilot ball valve

Technical Field

The invention relates to the technical field of valves, and in particular to a pilot ball valve.

Background Art

In the prior art, an electromagnetic pilot high-pressure water valve is a conventional high-pressure valve, which belongs to a type of sliding valve and mainly uses a piston with a throttle hole to realize switching. The electromagnetic pilot high-pressure water valve in the prior art comprises a coil (1), a moving iron core (2), a pilot hole (3), a piston (4), a throttle hole (5), a piston ring (6) and a valve body (7), as shown in Figure 3 of the specification. However, the current electromagnetic pilot high-pressure water valve has the following problems: the throttle hole is small and easy to be blocked; the sealing surface is made of polytetrafluoroethylene material and is easily damaged by impurities in the medium; the piston seal wears and leaks, causing the water valve to fail.

Summary of the invention

In view of the problems existing in the prior art, the present invention provides a pilot ball valve, aiming to solve the problems of easy clogging and wear of the water valve through the innovative design of the ball valve structure, thereby improving the anti-fouling performance and service life, while retaining the advantage of fast switching response speed.

The technical solutions adopted to achieve the above objectives are:

A pilot ball valve comprises a main valve assembly, a pilot valve assembly and a drive assembly.

The main valve assembly comprises a valve body, a valve cover, a main valve ball, a main valve seat, and a valve ball straightening sleeve. The valve body is provided with an inner hole, and a liquid inlet channel and a liquid outlet channel are provided on a side wall of the valve body. The valve cover is arranged at the upper end of the valve body and connected to the valve body. The valve cover has a through hole, and the through hole is connected to the inner hole. The valve ball straightening sleeve is arranged in the inner hole, and one end of the valve ball straightening sleeve is sealed and connected to the valve cover, one end of the valve seat is sealed and connected to the valve ball straightening sleeve, and the other end is sealed and connected to the valve body. The valve seat is connected to the liquid outlet channel, and the valve ball is arranged in the valve ball straightening sleeve. A liquid inlet hole B is provided on the side wall of the valve ball straightening sleeve, and the liquid inlet channel is connected to the valve ball straightening sleeve through the liquid inlet hole B, and the uppermost edge of the liquid inlet hole B is lower than the matching diameter of the main valve ball. The valve cover and the valve body are also provided with a pilot hole flow channel, and the pilot hole flow channel A is connected to the through hole of the valve cover and the liquid outlet channel;

The pilot valve assembly comprises a pilot valve stem, a pilot valve stem sealing body, a pilot valve sleeve, a pilot valve ball and a pilot valve seat. The pilot valve sleeve is arranged in the through hole of the valve cover. The pilot valve ball is arranged in the pilot valve sleeve and slidingly cooperates with the pilot valve sleeve. The pilot valve seat abuts against the bottom end of the pilot valve sleeve, and the pilot valve seat is fixedly connected to the valve cover. The pilot valve stem sealing body is arranged at the upper end of the valve cover and connected to the valve cover. The pilot valve stem at least partially passes through the pilot valve stem sealing body and enters the pilot valve sleeve. The pilot valve stem and the pilot valve stem sealing body slidingly cooperate. The side wall of the pilot valve sleeve has a pilot hole A, and the pilot hole is connected to the pilot hole flow channel.

The driving assembly is used for driving the pilot valve stem to move.

In some embodiments, the inner diameter of the valve ball straightening sleeve is larger than the diameter of the main valve ball, and there is a gap between the valve ball straightening sleeve and the main valve ball.

In some embodiments, a plurality of sealing rings are further provided, and the plurality of sealing rings are respectively provided between the valve body and the main valve seat, between the valve cover and the valve body, and between the valve ball straightening sleeve and the valve cover.

In some embodiments, the sealing ring is also arranged at the end faces of the pilot hole flow channel on the valve cover and the valve body.

In some embodiments, a liquid inlet connector is further provided, and the liquid inlet connector is provided on the side wall of the valve body, and the liquid inlet connector is connected to the liquid inlet channel.

In some embodiments, a liquid outlet joint is further provided, wherein the liquid outlet joint is provided on the side wall of the valve body and is connected to the liquid outlet channel.

In some embodiments, the drive assembly includes a cylinder and a cylinder bracket, the cylinder bracket is arranged at the upper end of the valve cover and connected to the valve cover, the cylinder is arranged at the upper end of the cylinder bracket and connected to the cylinder bracket, and the top end of the pilot valve stem is connected to the cylinder.

In some embodiments, a plurality of liquid inlet holes B are provided on the side wall of the valve ball straightening sleeve, and the liquid inlet holes B are distributed at intervals.

The beneficial effects of the present invention are:

1. The main valve ball moves freely during the movement, and the sealing surface that cooperates with the main valve seat is also random, which ensures the service life and reliability of the valve ball sealing surface.

2. There is a gap between the pilot hole, the main valve ball and the valve ball straightening sleeve, through which impurities can pass to prevent the pilot valve from being blocked.

3. There are multiple liquid inlet holes B, which can increase the flow rate through the water valve.

4. Equipped with liquid inlet and outlet connectors for easy connection of water lines.

5. Equipped with multiple sealing rings to prevent leakage.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of a pilot-operated ball valve according to an embodiment of the present invention;

FIG2 is a partial enlarged view of a pilot valve assembly according to an embodiment of the present invention;

FIG3 is a schematic diagram of an electromagnetic pilot high-pressure water valve in the prior art.

DETAILED DESCRIPTION

The present invention is further described below in conjunction with the accompanying drawings.

As shown in FIG. 1 , the pilot-operated ball valve according to the embodiment of the present invention includes a main valve assembly, a pilot valve assembly, and a drive assembly.

Specifically, the main valve assembly includes a valve body 1, a valve cover 2, a main valve ball 3, a main valve seat 4, and a valve ball straightening sleeve 5. The valve body 1 is a cylinder, and an inner hole connected to the upper end surface is provided in the valve body. A liquid inlet channel and a liquid discharge channel connected to the inner hole are provided on the side wall of the valve body 1. The valve cover 2 is provided at the upper end of the valve body 1 and partially extends into the inner hole of the valve body. The valve cover 2 is fixedly connected to the valve body 1 by bolts, and a sealing ring is provided between the valve body 1 and the valve cover 2.

A valve ball straightening sleeve 5 is provided in the inner hole of the valve body 1, and the upper end of the valve ball straightening sleeve 5 is fixedly connected to the valve cover 1, and a sealing ring is provided between the two. A through hole is provided on the valve cover 2. The main valve seat 4 is provided at the lower end of the valve ball straightening sleeve 5, and the upper end of the main valve seat 5 is fixedly connected and sealed to the valve ball straightening sleeve 5, and the lower end of the main valve seat 5 is fixedly connected and sealed to the valve body. The main valve ball 3 is provided in the valve ball straightening sleeve 5, and the diameter of the main valve ball 3 is smaller than the inner diameter of the valve ball straightening sleeve 5. There is a gap between the main valve ball 3 and the valve ball straightening sleeve 5. The main valve ball 3 can move freely in the valve ball straightening sleeve, and the random sealing surface of the main valve ball 3 can be sealed with the main valve seat 4. The main valve seat 4 is a circular ring, and the diameter of the main valve seat 4 is smaller than the diameter of the valve ball. The main valve seat 4 connects the valve ball straightening sleeve 5 and the liquid outlet channel. A plurality of liquid inlet holes B are arranged on the side wall of the valve ball straightening sleeve 5, and the plurality of liquid inlet holes B are spaced along the circumference of the valve ball straightening sleeve 5, and the liquid inlet channel is connected to the valve ball straightening sleeve 5 through the liquid inlet holes B. The uppermost edge of the liquid inlet hole B is lower than the matching diameter of the main valve ball 3. A pilot hole flow channel is also arranged on the valve body 1 and the valve cover 2, and the pilot hole flow channel is connected to the liquid outlet channel and the through hole of the valve cover 2, and a sealing ring is also arranged at the end surface of the pilot hole flow channel located on the valve body 1 and the valve cover 2.

The pilot valve assembly is arranged in the through hole of the valve cover 2. The pilot valve assembly includes a pilot valve stem 6, a pilot valve stem sealing body 7, a pilot valve sleeve 8, a pilot valve ball 9 and a pilot valve seat 10. The pilot valve sleeve 8 is arranged in the through hole. The lower end of the pilot valve sleeve 8 is fixedly connected to the pilot valve seat 10. The pilot valve seat 10 is fixedly connected to the valve cover 2 and sealed by a sealing member. The pilot valve ball 9 is arranged in the pilot valve sleeve 8 and is slidably matched with the pilot valve sleeve 8. The pilot valve ball 9 can move in the up and down direction. The lower end of the pilot valve stem 6 extends into the pilot valve sleeve 8, and the upper end of the pilot valve stem 6 passes through and extends out of the valve cover 2. The pilot valve stem sealing body 7 is arranged at the upper end of the valve cover 2 and is sleeved on the pilot valve stem 6. The pilot valve stem 6 and the pilot valve stem sealing body 7 are sealed by a sealing member. The pilot valve stem 6 can move in the up and down direction relative to the valve cover 2. A pilot hole A is provided on the side wall of the pilot valve sleeve 8, and the pilot hole A is connected to the pilot hole flow channel.

The driving assembly includes a cylinder 11 and a cylinder bracket 12. The cylinder bracket 12 is arranged at the upper end of the valve cover 2 and is fixedly connected to the valve cover 2 by bolts. The cylinder 11 is arranged at the upper end of the cylinder bracket 12 and is fixedly connected to the cylinder bracket 12. The cylinder 11 has a piston rod, which is fixedly connected to the upper end of the pilot valve stem 6. The cylinder 11 can drive the pilot valve stem 6 to move in the up and down directions.

The liquid inlet connector 13 is provided on the side wall of the valve body 1 and communicates with the liquid inlet channel. The liquid inlet connector is fixedly connected to the valve body 1 by bolts. The liquid outlet connector 14 is provided on the side wall of the valve body 1 and communicates with the liquid outlet channel. The liquid outlet connector 14 is fixedly connected to the valve body 1 by bolts.

According to the pilot ball valve of the embodiment of the present invention, when the pilot ball valve is closed, the cylinder 11 pushes the pilot valve stem 6 downward to press the pilot valve ball 9 against the pilot valve seat 10, and the pilot valve assembly is closed. High-pressure water enters the valve body 1 through the liquid inlet joint 13, and the main valve ball 3 is sealed with the main valve seat 4. The high-pressure water presses the main valve ball against the main valve seat under the action of pressure.

When the pilot ball valve is opened, the cylinder 11 drives the pilot valve stem 6 to move upward. Since there is high-pressure water in the ball valve righting sleeve, the pilot valve ball moves upward under the pressure, opening the pilot valve assembly. The high-pressure water passes through the valve ball righting sleeve 5, the pilot valve, the pilot hole flow channel and enters the liquid outlet channel. A throttling pressure difference is generated between the main valve ball 3 and the valve ball righting sleeve 5. Under the action of the throttling pressure difference, the main valve ball 3 moves upward and leaves the main valve seat 4, and the main valve opens.

This embodiment does not impose any formal limitation on the shape, material, structure, etc. of the present invention. Any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention shall fall within the protection scope of the technical solution of the present invention.

In the description of the present invention, it is necessary to understand that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the protection content of the present invention.

If the words "first", "second", etc. are used in this document to limit components, those skilled in the art should know that the use of "first" and "second" is only to facilitate the description of the present invention and simplify the description. Unless otherwise stated, the above words have no special meaning.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein, but these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (6)

1. A pilot operated ball valve, comprising:

The main valve assembly comprises a valve body, a valve cover, a main valve ball, a main valve seat and a valve ball centralizing sleeve, wherein an inner hole is formed in the valve body, a liquid inlet channel and a liquid outlet channel are formed in the side wall of the valve body, the valve cover is arranged at the upper end of the valve body and is connected with the valve body, the valve cover is provided with a through hole, the through hole is communicated with the inner hole, the valve ball centralizing sleeve is arranged in the inner hole, one end of the valve ball centralizing sleeve is in sealing connection with the valve cover, one end of the valve seat is in sealing connection with the valve ball centralizing sleeve, the other end of the valve seat is in sealing connection with the valve body, the valve seat is communicated with the liquid outlet channel, the valve ball is arranged in the valve ball centralizing sleeve, the side wall of the valve ball centralizing sleeve is provided with a liquid inlet B, the liquid inlet channel is communicated with the valve ball centralizing sleeve through the liquid inlet B, the uppermost edge of the liquid inlet B is lower than the matching diameter of the main valve ball, the valve cover and the valve body is also provided with a pilot flow channel, and the pilot flow channel is communicated with the through hole of the valve cover;

The pilot valve assembly comprises a pilot valve rod, a pilot valve rod sealing body, a pilot valve sleeve, a pilot valve ball and a pilot valve seat, wherein the pilot valve sleeve is arranged in a through hole of the valve cover, the pilot valve ball is arranged in the pilot valve sleeve and is in sliding fit with the pilot valve sleeve, the pilot valve seat is propped against the bottom end of the pilot valve sleeve, the pilot valve seat is fixedly connected with the valve cover, the pilot valve rod sealing body is arranged at the upper end of the valve cover and is connected with the valve cover, the pilot valve rod at least partially penetrates through the pilot valve rod sealing body to enter the pilot valve sleeve, the pilot valve rod is in sliding fit with the pilot valve rod sealing body, a pilot hole A is arranged on the side wall of the pilot valve sleeve, and the pilot hole is communicated with the pilot hole flow passage;

The driving assembly is used for driving the pilot valve rod to move;

the driving assembly comprises a cylinder and a cylinder bracket, the cylinder bracket is arranged at the upper end of the valve cover and connected with the valve cover, the cylinder is arranged at the upper end of the cylinder bracket and connected with the cylinder bracket, and the top end of the pilot valve rod is connected with the cylinder;

The valve ball righting sleeve is characterized in that a plurality of liquid inlet holes B are formed in the side wall of the valve ball righting sleeve, and the liquid inlet holes B are distributed at intervals.

2. The pilot ball valve of claim 1, wherein the valve ball centering sleeve has an inner diameter greater than the main valve ball diameter, and wherein a gap exists between the valve ball centering sleeve and the main valve ball.

3. The pilot ball valve of claim 1, further comprising a plurality of sealing rings disposed between the valve body and the main valve seat, between the valve cover and the valve body, and between the valve ball centering sleeve and the valve cover, respectively.

4. A pilot ball valve according to claim 3, wherein the sealing ring is also provided at the pilot hole flow passage end faces on the valve cover and the valve body.

5. The pilot operated ball valve of claim 1, further comprising a fluid inlet fitting disposed on a sidewall of the valve body, the fluid inlet fitting communicating with the fluid inlet passage.

6. The pilot operated ball valve of claim 1, further comprising a fluid outlet fitting disposed on a sidewall of the valve body, the fluid outlet fitting communicating with the fluid outlet passage.