Rotary valve for backwashing of filter

Abstract

The device comprises a power end, an upper rotating plate, a lower rotating plate, a barrel and a transmission plate, the power end is installed at the output end of an external motor, the upper rotating plate is fixedly installed on the lower side of the outer surface of the power end, the transmission plate is fixedly installed between the upper rotating plate and the lower rotating plate, and the barrel is rotationally assembled on the peripheral face of the upper rotating plate and the peripheral face of the lower rotating plate. The rotary valve is designed, the rotary valve mainly plays a role of a suction nozzle, the rotary valve is communicated with a filter pollution discharge cavity through the round hole, dirt in a filter element is discharged through pressure difference and water flow, in addition, through the design of the transmission plate and the cylinder body, in the backwashing process, the filter element is not prone to falling off, and the filter element is not prone to falling off. The transmission plate can drive the barrel to rotate, dirt in the filter elements communicated with the dirt discharge areas can be effectively discharged in cooperation with the design of the multiple dirt discharge areas in the dirt discharge cavity, and in the filtering process, the transmission plate can be used for shielding the round hole, so that the rotary valve integrates the function of a dirt discharge valve.

Description

Technical Field

[0001] The utility model belongs to the technical field of filter equipment, and in particular provides a rotary valve for backwashing a filter. Background Art

[0002] Multi-column filters are widely used in the water treatment process of steel plants and are important equipment for water treatment in steel plants. They can intercept impurities and sludge in the water and complete the filtration work. Figure 7 The figure shows a schematic diagram of a traditional multi-column filter, in which the backwashing and sewage discharge structure mainly includes a suction arm, a suction nozzle, a main shaft sewage discharge pipe, a locking nut and other structures, which are relatively complicated. During the backwashing process, the suction nozzle needs to be controlled to contact each filter element in turn to complete the backwashing of the filter element. During this process, since the suction nozzle is repeatedly connected and detached from the two ends of the filter element, the suction nozzle is easy to fall off during operation, and the spring inside it is also easy to get stuck or fall off. Repeated force is also easy to cause the main shaft to bend, and ultimately the backwashing effect is not ideal. Therefore, a filter backwashing rotary valve with a firm and stable structure that effectively realizes the backwashing and sewage discharge function is needed. Utility Model Content

[0003] In order to solve the above problems, the utility model provides a rotary valve for backwashing of a filter.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a rotary valve for filter backwashing, comprising a power end, an upper rotating plate, a lower rotating plate, a cylinder and a transmission plate, wherein the power end is mounted on the output end of an external motor, the upper rotating plate is fixedly mounted on the lower side of the outer surface of the power end, the transmission plate is fixedly mounted between the upper rotating plate and the lower rotating plate, the cylinder is rotatably assembled on the outer circumferential surfaces of the upper rotating plate and the lower rotating plate, and the cylinder is rotatably assembled on the outer surface of the transmission plate, a circular hole is opened on the outer surface of the cylinder, and a sewage discharge hole is opened on the surface of the lower rotating plate;

[0005] The inner surface of the cylinder is symmetrically provided with slide grooves, and the circular hole is located between the two slide grooves. The outer surface of the transmission plate is symmetrically fixed with transmission rods on both sides, and the transmission rods are movably assembled in the slide grooves.

[0006] Furthermore, the inner wall of the slide groove is equipped with a sealing strip.

[0007] Furthermore, the outer surface area of ​​the transmission plate is larger than the area of ​​the circular hole.

[0008] Furthermore, annular limiting plates are fixedly installed at both upper and lower ends of the cylinder, and the inner surfaces of the two annular limiting plates are respectively attached to the outer surfaces of the upper rotating plate and the lower rotating plate.

[0009] Furthermore, a connecting support column is fixedly installed between the upper rotating plate and the lower rotating plate.

[0010] Furthermore, there are two transmission plates in total, and the two transmission plates are symmetrically distributed between the upper rotating plate and the lower rotating plate.

[0011] The beneficial effects of using the utility model are:

[0012] 1. The utility model designs a rotary valve, which mainly plays the function of a suction nozzle. It is connected with the filter drainage chamber through a circular hole, and uses pressure difference and water flow to discharge the dirt in the filter element. In addition, through the design of the transmission plate and the cylinder, during the backwashing process, the transmission plate can drive the cylinder to rotate, and with the design of multiple drainage areas in the drainage chamber, the dirt in the filter element connected to each drainage area can be effectively discharged. During the filtering process, the transmission plate can be used to cover the circular hole, so that the rotary valve integrates the function of the drainage valve.

[0013] 2. The rotary valve designed by the utility model has a simple structure and is easy to operate. It can simultaneously serve as a suction nozzle and a sewage valve and has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a front cross-sectional view of the rotary valve in the open state in the first embodiment of the utility model.

[0015] Figure 2 For this utility model Figure 1 Cross-sectional view along the AA direction.

[0016] Figure 3 This is a front cross-sectional view of the rotary valve in the closed state in the first embodiment of the utility model.

[0017] Figure 4 It is a top sectional view of the rotary valve in the second embodiment of the utility model.

[0018] Figure 5 This is a schematic diagram of the rotary valve of the utility model being applied to a filter.

[0019] Figure 6 It is a top view schematic diagram of the rotary valve of the utility model applied to a filter.

[0020] Figure 7 Schematic diagram of a traditional multi-column filter.

[0021] The reference numerals include: 1. power end, 2. upper rotating plate, 3. lower rotating plate, 4. cylinder, 5. transmission plate, 6. slide groove, 7. transmission rod, 8. circular hole, 9. annular limit plate, 10. drain hole, 11. connecting support column. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] Embodiment 1

[0024] Reference Figures 1 to 3 A rotary valve for backwashing a filter comprises a power end 1, an upper rotating plate 2, a lower rotating plate 3, a cylinder 4 and a transmission plate 5, wherein the power end 1 is mounted at the output end of an external motor, the upper rotating plate 2 is fixedly mounted on the lower side of the outer surface of the power end 1, the transmission plate 5 is fixedly mounted between the upper rotating plate 2 and the lower rotating plate 3, the cylinder 4 is rotatably assembled on the outer circumferential surfaces of the upper rotating plate 2 and the lower rotating plate 3, and the cylinder 4 is rotatably assembled on the outer surface of the transmission plate 5, a circular hole 8 is opened on the outer surface of the cylinder 4, and a sewage discharge hole 10 is opened on the surface of the lower rotating plate 3.

[0025] The external motor drives the power end 1 to rotate, thereby driving the entire rotary valve to rotate.

[0026] The upper rotating plate 2, the lower rotating plate 3 and the transmission plate 5 are connected by welding and are a whole that rotates together.

[0027] In this embodiment, only one circular hole 8 is designed on the cylinder 4 .

[0028] The sewage hole 10 is connected to the sewage pipe.

[0029] The inner surface of the cylinder 4 is symmetrically provided with slide grooves 6 , and the circular hole 8 is located between the two slide grooves 6 . The outer surface of the transmission plate 5 is symmetrically fixed with transmission rods 7 on both sides, and the transmission rods 7 are movably assembled in the slide grooves 6 .

[0030] The slide groove 6 is an arc groove, which limits the relative rotation angle between the cylinder 4 and the transmission plate 5. Therefore, when the power end 1 rotates, the transmission plate 5 is first driven to rotate. When the transmission rod 7 moves to the side of the inner cavity of the slide groove 6, it will drive the cylinder 4 to rotate together.

[0031] like Figure 5 As shown in FIG. 1 , a schematic diagram of a multi-column filter for practical application of the rotary valve is shown, wherein the interior of the multi-column filter is divided into a water inlet chamber, a filter chamber and a sewage discharge chamber, the sewage discharge chamber is located at the bottom of the filter, and the rotary valve is assembled in the sewage discharge chamber. A partition is also provided in the sewage discharge chamber to divide the sewage discharge chamber into multiple sewage discharge areas, such as Figure 6 As shown, the distribution of the sewage discharge areas can be known, and each sewage discharge area is connected to one or more filter elements;

[0032] During backwashing, the power end 1 first drives the transmission plate 5 to rotate, so that the transmission plate 5 does not block the circular hole 8. As the transmission plate 5 continues to rotate, the cylinder 4 will be driven to rotate, and the circular hole 8 will be connected with each sewage discharge area in turn. At this time, under the action of the internal and external pressure difference and the water flow inside the filter, the rotary valve acts as a suction nozzle, causing water to flow from the outside of the filter element to the inside of the filter element, flushing the dirt inside the filter element and flowing to the rotary valve with the water flow, and finally discharged through the sewage pipe;

[0033] During filtering operation, the power end 1 first drives the transmission plate 5 to rotate in the opposite direction to a position where the circular hole 8 is blocked. At this time, the rotary valve acts as a sewage valve to close the sewage pipe.

[0034] Since the sewage discharge chamber is divided into a plurality of sewage discharge areas, the volume of the area connected by the circular hole 8 will be reduced relative to the entire sewage discharge chamber, thereby increasing the pressure difference and achieving a better backwashing effect.

[0035] Specifically, the inner wall of the slide groove 6 is equipped with a sealing strip, which plays a sealing effect when the transmission plate 5 blocks the circular hole 8.

[0036] Specifically, the outer surface area of ​​the transmission plate 5 is larger than the area of ​​the circular hole 8 , so that the transmission plate 5 can effectively block the circular hole 8 .

[0037] Specifically, if Figure 1 and Figure 3 As shown, annular limiting plates 9 are fixedly installed at both upper and lower ends of the cylinder 4, and the inner surfaces of the two annular limiting plates 9 are respectively attached to the outer surfaces of the upper rotating plate 2 and the lower rotating plate 3.

[0038] The annular limiting plate 9 is installed on the cylinder 4 by welding, and cooperates with the upper rotating plate 2 and the lower rotating plate 3 to limit the position of the cylinder 4 so that the cylinder 4 can only perform rotational movement.

[0039] Specifically, if Figures 1 to 3 As shown, a connecting support column 11 is fixedly installed between the upper rotating plate 2 and the lower rotating plate 3.

[0040] The connecting support column 11 is an auxiliary connecting support structure of the upper rotating plate 2 and the lower rotating plate 3, and increases the overall strength and stability of the rotary valve.

[0041] Embodiment 2

[0042] like Figure 4 As shown, the difference from the first embodiment is that:

[0043] Specifically, there are two transmission plates 5 , and the two transmission plates 5 are symmetrically distributed between the upper rotating plate 2 and the lower rotating plate 3 .

[0044] Providing a plurality of transmission plates 5 can better drive the cylinder 4 to rotate, and can reduce the pressure and wear of the transmission rod 7 on each transmission plate 5, thereby increasing the service life.

[0045] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, many changes can be made in the specific implementation methods and application scopes based on the ideas of the present invention. As long as these changes do not deviate from the concept of the present invention, they all belong to the protection scope of the present invention.

Claims

1. A rotary valve for filter backwashing, characterized in that: It includes a power end, an upper rotating plate, a lower rotating plate, a cylinder and a transmission plate, wherein the power end is mounted on the output end of an external motor, the upper rotating plate is fixedly mounted on the lower side of the outer surface of the power end, the transmission plate is fixedly mounted between the upper rotating plate and the lower rotating plate, the cylinder is rotatably mounted on the outer circumference of the upper rotating plate and the lower rotating plate, and the cylinder is rotatably mounted on the outer surface of the transmission plate, a circular hole is opened on the outer surface of the cylinder, and a sewage discharge hole is opened on the surface of the lower rotating plate; The inner surface of the cylinder is symmetrically provided with slide grooves, and the circular hole is located between the two slide grooves. The outer surface of the transmission plate is symmetrically fixed with transmission rods on both sides, and the transmission rods are movably assembled in the slide grooves.

2. A filter backwashing rotary valve according to claim 1, characterized in that: The inner wall of the slide groove is equipped with a sealing strip.

3. A filter backwashing rotary valve according to claim 1, characterized in that: The outer surface area of ​​the transmission plate is larger than the area of ​​the circular hole.

4. A filter backwashing rotary valve according to claim 1, characterized in that: Annular limiting plates are fixedly mounted on both upper and lower ends of the cylinder, and the inner surfaces of the two annular limiting plates are respectively fitted to the outer surfaces of the upper rotating plate and the lower rotating plate.

5. A filter backwashing rotary valve according to claim 1, characterized in that: A connecting support column is fixedly installed between the upper rotating plate and the lower rotating plate.

6. A filter backwashing rotary valve according to claim 1, characterized in that: There are two transmission plates in total, and the two transmission plates are symmetrically distributed between the upper rotating plate and the lower rotating plate.

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