Filtering ball valve with backwashing function

Abstract

The filtering ball valve with the backwashing function comprises a valve body, a ball body is arranged in the valve body, the upper side of the ball body is connected with a handle through a valve rod, a filtering net is installed in the ball body, the filtering net is cylindrical and is fixed to the ball body through a clamping ring, and an access cover is arranged on the side face of the valve body. The access cover is fixed to the valve body through the quick clamping device, the quick clamping device comprises a clamping seat, the clamping seat is arranged in the access cover, one end of the clamping seat is connected with one end of a rotating shaft, a cam sleeve is arranged in the valve body, the other end of the rotating shaft extends into the cam sleeve and is provided with a limiting shaft in a penetrating mode in the radial direction, and the limiting shaft is fixedly connected with the cam sleeve in a clamped mode. The cam sleeve is provided with a cam step, the sealing surface can be pressed tightly through the limiting shaft, and the sealing performance of the valve deck is enhanced. During maintenance, the quick clamping device can be loosened and the access cover can be opened only by rotating the clamping seat by 90 degrees, so that the access cover can be quickly dismounted or mounted, the cleaning time of the valve is shortened, and the working efficiency of valve maintenance is improved.

Description

Technical Field

[0001] The utility model relates to the field of machinery, in particular to a valve, in particular to a filtering ball valve with a backwashing function. Background Art

[0002] Filter ball valves are commonly installed in heating pipeline networks. Serving as both a filter and a welded ball valve, they are key components of pipeline system control. Existing filter ball valves suffer from issues such as easy clogging, lengthy cleaning times, the need to disassemble the cover flange for blockage repairs, time-consuming and labor-intensive maintenance, and low efficiency. These issues severely hinder their effective use and make them unable to meet the growing demands of pipeline control. Summary of the Invention

[0003] The purpose of the utility model is to provide a filter ball valve with a backwash function, which solves the technical problems in the prior art that the filter ball valve is easily clogged, the cleaning process takes a long time, and the disassembly and installation of the inspection cover flange is time-consuming and labor-intensive.

[0004] The utility model provides a filter ball valve with a backwash function, comprising a valve body, a ball disposed in the valve body, a handle connected to the upper side of the ball via a valve stem, a filter screen installed in the ball, the filter screen being cylindrical and fixed to the ball via a clamping ring, the ball having three operating positions, namely, a valve open position, a valve closed position, and a backwash position, wherein the axis of the ball in the valve closed position forms an angle of 90° with the axis of the ball in the valve open position, and the axis of the ball in the backwash position forms an angle of 180° with the axis of the ball in the valve open position;

[0005] An inspection cover is provided on the side of the valve body, and the inspection cover is fixed to the valve body by a quick clamp. The quick clamp includes a clamping seat, which is provided in the inspection cover. One end of the clamping seat is connected to one end of the rotating shaft. A cam sleeve is provided in the valve body, and the other end of the rotating shaft extends into the cam sleeve and is radially penetrated by a limiting shaft, which is fixed by clamping with the cam sleeve.

[0006] Furthermore, the valve body is a fully welded ball valve body.

[0007] Furthermore, the cam sleeve includes a cam step.

[0008] Compared with the existing technology, the present invention offers significant and effective results. During maintenance, the clamping base can be rotated 90 degrees. The rotating shaft then rotates the limiting shaft 90 degrees, freeing the limiting shaft from the cam sleeve. The quick-release clamp can then be removed, the limiting shaft disengaged from the cam sleeve, and the access cover opened. The quick-release clamp allows for rapid removal and installation of the access cover, reducing valve cleaning time and improving valve maintenance efficiency. The valve has three operating positions: open (open) and closed (closed), allowing maintenance work. In the backwash position, the handle rotates the ball 180 degrees relative to the open position, allowing the medium to backwash the filter screen within the ball, quickly cleaning the filter and restoring its filtration function. The filter screen is secured with a retaining ring, preventing it from loosening during backwashing. Furthermore, installation and disassembly are simple, resulting in efficient maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is a front sectional schematic diagram of a filter ball valve with backwashing function according to the present invention.

[0010] Figure 2 The utility model is a side sectional schematic diagram of a filter ball valve with backwashing function.

[0011] Figure 3 for Figure 2 A partial enlarged schematic diagram. DETAILED DESCRIPTION

[0012] The following is a further description of the present invention in conjunction with an embodiment. However, the present invention is not limited to the embodiment. All similar variations of the present invention should be included in the scope of protection of the present invention. The use of directions such as up, down, front, back, left, right, center, inside, and outside in the present invention is only for the convenience of description and does not limit the technical solution of the present invention.

[0013] like Figure 1-Figure 3 As shown, the utility model is a filter ball valve with backwash function, comprising a valve body 1, a ball 2 is provided in the valve body 1, a handle is connected to the upper side of the ball 2 through a valve stem, a filter screen 3 is installed in the ball 2, the filter screen 3 is cylindrical, and the filter screen 3 is fixed to the ball 2 by a clamping ring 4, and the ball 2 has three operating positions, namely, a valve open position, a valve closed position, and a backwash position. The axis of the ball 2 in the valve closed position forms an angle of 90° with the axis of the ball 2 in the valve open position, and the axis of the ball 2 in the backwash position forms an angle of 180° with the axis of the ball 2 in the valve open position.

[0014] An inspection cover 11 is provided on the side of the valve body 1, and the inspection cover 11 is fixed to the valve body 1 through a quick clamp 5. The quick clamp 5 includes a clamping seat 7, which is arranged in the inspection cover 11. One end of the clamping seat 7 is connected to one end of the rotating shaft 8. A cam sleeve 10 is provided in the valve body 1, and the other end of the rotating shaft 8 extends into the cam sleeve 10 and is radially penetrated by a limiting shaft 9, which is fixed by clamping with the cam sleeve 10.

[0015] Furthermore, the valve body 1 is a fully welded ball valve body 1.

[0016] Furthermore, the cam sleeve 10 includes a cam step. The cam step can be pressed tightly against the valve cover through the limiting shaft 9 to enhance the sealing performance of the valve cover.

[0017] Specifically, the valve body 1, ball 2, valve stem, handle, filter 3, retaining ring 4, inspection cover 11, cam sleeve 10, fully welded ball valve body 1, etc. in this embodiment all adopt well-known solutions in the prior art, which are well understood by those skilled in the art and will not be described in detail here.

[0018] The working principle of this embodiment is as follows:

[0019] During disassembly and maintenance, the clamping seat 7 is rotated 90 degrees. The clamping seat 7 drives the limiting shaft 9 to rotate 90 degrees via the rotating shaft 8. The limiting shaft 9 moves on the inclined surface of the cam step on the back side of the cam sleeve 10, releasing the pressure of the cam sleeve 10 on the inspection cover 11. Finally, the limiting shaft 9 is removed from the groove on the end face of the cam sleeve 10, the quick clamp 5 is released, and the inspection cover 11 is separated from the valve body 1. This allows for quick disassembly of the inspection cover 11, reducing valve cleaning time and improving valve maintenance efficiency. To install the inspection cover 11, perform the above steps in reverse order.

[0020] The valve has three operating positions. When the valve is open, it is in the open position. When the valve is closed, it is in the closed position, allowing maintenance work. In the backwash position, the handle rotates the ball 2 180 degrees compared to the open position, allowing the medium water to backwash the filter 3 inside the ball 2, quickly cleaning the filter 3 and restoring its filtering function. The filter 3 is fixed with a retaining ring 4, which prevents the filter 3 from loosening during reverse flushing. Installation and disassembly are simple, and maintenance is efficient.

Claims

1. A filter ball valve with backwash function, characterized in that: The valve comprises a valve body, wherein a ball is provided in the valve body, a handle is connected to the upper side of the ball through a valve stem, a filter screen is installed in the ball, the filter screen is cylindrical, and the filter screen is fixed to the ball by a clamp ring, and the ball has three operating positions, namely, a valve open position, a valve closed position, and a backwash position, wherein the axis of the ball in the valve closed position forms an angle of 90° with the axis of the ball in the valve open position, and the axis of the ball in the backwash position forms an angle of 180° with the axis of the ball in the valve open position; An inspection cover is provided on the side of the valve body, and the inspection cover is fixed to the valve body by a quick clamp. The quick clamp includes a clamping seat, which is provided in the inspection cover. One end of the clamping seat is connected to one end of the rotating shaft. A cam sleeve is provided in the valve body, and the other end of the rotating shaft extends into the cam sleeve and is radially penetrated by a limiting shaft, which is fixed by clamping with the cam sleeve.

2. A filter ball valve with backwashing function according to claim 1, characterized in that: The valve body is a fully welded ball valve body.

3. The filter ball valve with backwashing function according to claim 1, characterized in that: The cam sleeve includes a cam step.

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