Automatic filter screen cleaning structure and plate heat exchanger

Abstract

The utility model relates to an automatic filter screen cleaning structure and a plate heat exchanger. Comprising two filter screen cleaning structures and a control box, each filter screen cleaning structure comprises a blind plate flange, an electric cleaning brush, a blow-off pipe and an electric blow-off shut-off valve, a cleaning opening and a blow-off opening are formed in each blind plate flange, each electric cleaning brush is composed of a motor and a cleaning brush, the cleaning brushes penetrate through the cleaning openings in the blind plate flanges and are fixedly connected with the blind plate flanges, and the electric blow-off shut-off valves are arranged on the blow-off pipes. An output shaft of each motor is connected with an input rotating shaft of the corresponding cleaning brush to drive the cleaning brush to rotate, a blow-off pipe is fixedly installed on a blow-off opening of the blind flange, an electric blow-off shut-off valve is installed on the blow-off pipe, and the control box is electrically connected with the two motors and the two electric blow-off shut-off valves. According to the invention, automatic and timed cleaning can be realized, and the defects of manual operation are completely overcome.

Description

Technical Field

[0001] The utility model relates to the field of heat exchanger cleaning equipment, in particular to an automatic filter screen cleaning structure and a plate heat exchanger. Background Art

[0002] Plate heat exchangers play an important role in industrial development. With the rapid development of my country's industry, the use of plate heat exchangers has also increased. During use, it was found that after a period of use, the plate heat exchanger would easily become clogged due to the presence of impurities in the medium, which would cause the filter installed in the fluid channel at the inlet of the hot and cold media of the heat exchanger to become clogged, reducing the heat transfer efficiency. Due to the structural characteristics of previous plate heat exchangers, when the filter was clogged, the heat exchanger needed to be shut down, the filter in the fluid channel needed to be removed and cleaned, and then reinstalled. It was impossible to clean the filter and drain the waste while the machine was running. Even if cleaning was possible without stopping the machine in the existing technology, it was still done manually, and each cleaning took at least one hour. The manual cleaning method was time-consuming and intensive, and the medium temperature was high and corrosive. Such manual operation posed a great safety hazard. Summary of the Invention

[0003] The purpose of the utility model is to provide an automatic filter screen cleaning structure and a plate heat exchanger. The cleaning device can automatically clean the filter screen during operation with high efficiency.

[0004] The technical solution of this utility model:

[0005] An automatic filter cleaning structure includes two filter cleaning structures and a control box. The filter cleaning structure includes a blind flange, an electric cleaning brush, a drain pipe, and an electric drain shut-off valve. The blind flange is provided with a cleaning port and a drain port. The electric cleaning brush consists of a motor and a cleaning brush. The cleaning brush passes through the cleaning port on the blind flange and is fixedly connected to the blind flange. The output shaft of the motor is connected to the input rotating shaft of the cleaning brush to drive the cleaning brush to rotate. A drain pipe is fixedly installed on the drain port of the blind flange, and an electric drain shut-off valve is installed on the drain pipe. The control box is electrically connected to the two motors and the two electric drain shut-off valves.

[0006] Beneficial effects of the utility model:

[0007] 1. This application is to change the structure of the plate heat exchanger, open a hole at the corner hole on the side of the movable plate of the plate heat exchanger, add an electric cleaning brush device, add a sewage pipe and an electric sewage shut-off valve at the lower end of the corner hole on the side of the movable plate, and add a control box on the movable plate. The control box controls the start and stop of the electric cleaning brush and the opening and closing of the electric sewage shut-off valve to automatically clean the filter of the plate heat exchanger and discharge sewage, thereby improving the performance of the plate heat exchanger.

[0008] 2. Conventional manual cleaning requires a heat exchanger to be cleaned every three to five days. Each cleaning cycle requires cleaning the cold medium inlet filter and the hot medium inlet filter twice, taking at least an hour to complete. This manual operation is time-consuming and demanding. Furthermore, the medium temperature is very high, which can easily burn workers. Corrosive media can be even more harmful. This application enables automated, timed cleaning, completely eliminating the drawbacks of manual operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0010] Figure 1 This is a schematic diagram of an automatic filter cleaning structure for this application.

[0011] Figure 2 This is a schematic diagram of the plate heat exchanger structure with an automatic filter cleaning structure.

[0012] Figure 3 Schematic diagram of the fixed plate side of a plate heat exchanger with an automatic filter cleaning structure.

[0013] Reference numerals:

[0014] Filter cleaning structure 1; control box 2; blind flange 11; electric cleaning brush 12; sewage pipe 13; electric sewage shut-off valve 14; motor 121; cleaning brush 122; motor output shaft 123; input shaft 124; fixed plate 10; movable plate 20; heat exchange plate 30. DETAILED DESCRIPTION

[0015] In order to solve the problems in the background technology, an automatic filter cleaning structure and a plate heat exchanger are specially invented, which can automatically clean the filter during the operation of the heat exchanger with high efficiency.

[0016] It should be noted that, in the description of the present invention, the terms "upper" and "lower" etc. 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, and do not indicate or imply 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 present invention.

[0017] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0018] This application belongs to the structure of plate heat exchanger filter cleaning, which realizes automatic cleaning of plate heat exchanger filter by adding a control box, electric cleaning brush, drain pipe and electric drain shut-off valve. It is mainly used in centralized heating, electric power, petrochemical, metallurgy and other fields.

[0019] The prior patent number of this application is: ZL202322385160.X, and the patent name is: A filter cleaning structure and plate heat exchanger. It discloses a plate heat exchanger cleaning structure that requires a hand-cranked cleaning brush to clean, and then manually open the shut-off valve to drain the sewage. It cannot be cleaned automatically, the operation intensity is high, and there are safety hazards.

[0020] like Figure 1 As shown, an automatic filter cleaning structure includes two filter cleaning structures 1 and a control box 2. The filter cleaning structure 1 includes a blind flange 11, an electric cleaning brush 12, a drain pipe 13, and an electric drain shut-off valve 14. The blind flange 11 has a cleaning port and a drain port. The electric cleaning brush 12 consists of a motor 121 and a cleaning brush 122. The cleaning brush 122 passes through the cleaning port of the blind flange 11 and is fixedly connected to the blind flange 11. The motor output shaft 123 is connected to the input shaft 124 of the cleaning brush 122, driving the cleaning brush 122 to rotate. The drain port of the blind flange 11 is fixedly mounted with a drain pipe 13, and the drain pipe 13 is equipped with an electric drain shut-off valve 14. The control box 1 is electrically connected to the two motors 121 and the two electric drain shut-off valves 14. The two filter cleaning structures are respectively arranged at positions corresponding to the hot side medium inlet channel and the cold side medium inlet channel.

[0021] like Figure 2 and 3As shown, a plate heat exchanger includes a fixed plate 10, a movable plate 20, and a heat exchange plate 30 between the fixed plate and the movable plate. Filters are installed in the cold medium and hot medium inlet channels (channels composed of corner holes of multiple heat exchange plates) on the upper and lower parts of the heat exchange plate 30. The plate heat exchanger also includes an automatic filter cleaning structure. The automatic filter cleaning structure includes two filter cleaning structures 1 and a control box 2. The filter cleaning structure 1 includes a blind flange 11, an electric cleaning brush 12, a drain pipe 13, and an electric drain shut-off valve 14. The blind flange 11 is provided with a cleaning port and a drain port. The electric cleaning brush 12 is powered by an electric The machine is composed of a machine 121 and a cleaning brush 122 (the cleaning brush can be a commonly used cleaning brush in the prior art, or a cleaning brush structure with patent number 202322385160.X), the cleaning brush 122 passes through the cleaning port on the blind flange 11 and is fixedly connected to the blind flange 11, the motor output shaft 123 is connected to the input rotating shaft 124 of the cleaning brush 122, driving the cleaning brush 122 to rotate, a sewage pipe 13 is fixedly installed on the sewage outlet of the blind flange 11, and an electric sewage shut-off valve 14 is installed on the sewage pipe 13, and the control box 1 is electrically connected to the two motors 121 and the two electric sewage shut-off valves 14.

[0022] Blind flanges 11 are bolted to the outside of movable plate 20 at the corner holes corresponding to the cold-side and hot-side medium inlets. Cleaning holes and drain holes are provided on movable plate 20 at the corner holes corresponding to the cold-side and hot-side medium inlets. These cleaning holes and drain holes correspond to the cleaning ports and drain ports on the blind flanges, respectively. The electric cleaning brush is inserted into the filter screen through the cleaning port on the blind flange and the cleaning hole on the movable plate. A controller is fixed to the movable plate and is used to control the two motors to drive the electric cleaning brushes and control the opening and closing of the electric drain shut-off valve.

[0023] This application changes the original manual brush cleaning structure to an electric cleaning structure, changes the open and close valve to an electric sewage shut-off valve, and adds a control box. The original manual method of manually opening the shut-off valve to drain sewage after cleaning with a manual brush is changed to a method of controlling the opening and closing of the electric cleaning brush and the electric sewage shut-off valve through a control box, thereby achieving automatic cleaning and sewage discharge of the plate heat exchanger filter. A control box is set on the plate heat exchanger to control the opening and closing of the electric cleaning brush and the automatic cleaning at a fixed time. When the cleaning is completed, the electric sewage shut-off valve is controlled to open and the sewage is discharged through the sewage pipe.

[0024] The above is a schematic description of the present invention and its embodiments, which is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by this and does not deviate from the technical solution of the present invention, and according to the technical essence of the present invention, he or she can design a structure and implementation similar to the above embodiment without inventiveness, it shall fall within the scope of protection of the present invention.

Claims

1. An automatic filter cleaning structure, characterized by: It includes two filter cleaning structures and a control box. The filter cleaning structure includes a blind flange, an electric cleaning brush, a drain pipe, and an electric drain shut-off valve. The blind flange is provided with a cleaning port and a drain port. The electric cleaning brush is composed of a motor and a cleaning brush. The cleaning brush passes through the cleaning port on the blind flange and is fixedly connected to the blind flange. The output shaft of the motor is connected to the input shaft of the cleaning brush to drive the cleaning brush to rotate. A drain pipe is fixedly installed on the drain port of the blind flange, and an electric drain shut-off valve is installed on the drain pipe. The control box is electrically connected to the two motors and the two electric drain shut-off valves.

2. A plate heat exchanger comprising a fixed plate, a movable plate, and heat exchange plates between the fixed plate and the movable plate, wherein filters are installed in the inlet channels for the cold medium and the hot medium at the upper and lower parts of the heat exchange plates, and characterized in that: It also includes an automatic filter cleaning structure as described in claim 1; blind flanges are bolted to the corner holes on the outside of the movable plate corresponding to the inlets of the cold side medium and the hot side medium, and cleaning holes and drain holes are opened on the movable plate at the corner holes corresponding to the inlets of the cold side medium and the hot side medium, and the cleaning holes and drain holes correspond to the cleaning ports and drain ports on the blind flange respectively, and the cleaning brush of the electric cleaning brush is inserted into the filter through the cleaning port of the blind flange and the cleaning hole on the movable plate.

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