Plate heat exchanger with cylindrical filter screen fixing frame

Abstract

A plate heat exchanger with a cylindrical filter screen fixing frame comprises a fixed plate and a movable plate which are arranged in parallel, an inlet and an outlet are formed in the fixed plate, a transverse flow channel is arranged between the fixed plate and the movable plate, a heat exchange plate is arranged between the movable plate and the fixed plate, and a cylindrical filter screen is inserted into the rear end of the transverse flow channel. The rear end of the cylindrical filter screen is closed and provided with a first limiting plate, the first limiting plate is located on the rear side of the movable plate, a fixing frame is inserted into the inlet and comprises a second limiting plate, a through hole is formed in the second limiting plate, the rear side of the through hole is connected with an annular fixing plate, and the outer diameter of the annular fixing plate is smaller than the inner diameter of the cylindrical filter screen. A medium enters the cylindrical filter screen from the through hole of the second limiting plate and the annular fixing plate, is filtered by the cylindrical filter screen and then enters the vertical flow channel, and therefore it is guaranteed that the medium enters the plate heat exchanger after being filtered by the cylindrical filter screen and does not enter a gap between the cylindrical filter screen and an inlet.

Description

Technical Field

[0001] This utility model relates to the field of machinery, and more particularly to heat exchange devices, especially a plate heat exchanger with a cylindrical filter screen fixing bracket. Background Technology

[0002] Hot and cold fluids exchange heat through the channels between the plates of a plate heat exchanger. Due to the varying nature of the media flowing through a plate heat exchanger, the media may contain a large amount of impurities or contaminants. These impurities can usually be removed by installing a cylindrical filter screen at the inlet of the heat exchanger, thus preventing damage to the plate heat exchanger. In existing technologies, however, after installation, the cylindrical filter screen often cannot be fixed in place, leading to misalignment of the filter screen opening. Figure 1 As shown, this causes the medium to enter the heat exchanger through the gap between the cylindrical filter screen and the heat exchanger inlet, resulting in the medium not being filtered by the filter screen and causing damage to the heat exchanger. Summary of the Invention

[0003] The purpose of this utility model is to provide a plate heat exchanger with a cylindrical filter screen fixing bracket, which solves the technical problem in the prior art where the medium enters the heat exchanger through the gap between the cylindrical filter screen and the inlet.

[0004] This utility model discloses a plate heat exchanger with a cylindrical filter screen holder, comprising a fixed plate and a movable plate arranged in parallel, connected by bolts and nuts. The fixed plate has an inlet and an outlet, and a transverse flow channel is provided between the fixed plate and the movable plate. Several heat exchange plates are arranged parallel and spaced above the transverse flow channel between the movable plate and the fixed plate, forming a vertical flow channel between the heat exchange plates. The inlet is sequentially connected to the transverse flow channel, the vertical flow channel, and the outlet. A cylindrical filter screen is inserted at the rear end of the transverse flow channel. The rear end of the cylindrical filter screen is closed and a first limiting plate is provided. The first limiting plate is located behind the movable plate. The front end of the cylindrical filter screen extends forward into the inlet, where a fixing frame is inserted. The fixing frame includes a second limiting plate with a through hole. An annular fixing plate is connected to the rear side of the through hole. The outer diameter of the annular fixing plate is smaller than the inner diameter of the cylindrical filter screen. The second limiting plate is located in front of the fixed plate, and the annular fixing plate is fixed to the inner wall of the cylindrical filter screen.

[0005] Furthermore, the annular fixing plate is composed of an annular conical plate.

[0006] Compared with existing technologies, the advantages of this invention are positive and significant. The outer diameter of the annular fixing plate is smaller than the inner diameter of the cylindrical filter screen, allowing it to be easily embedded in the front end of the cylindrical filter screen. The medium enters the interior of the cylindrical filter screen through the through-hole of the second limiting plate and the annular fixing plate. After being filtered by the cylindrical filter screen, it enters the vertical flow channel, ensuring that the medium is filtered by the cylindrical filter screen before entering the plate heat exchanger, and preventing it from entering the gap between the cylindrical filter screen and the inlet. This protects the normal operation of the equipment, reduces the frequency of maintenance and cleaning, and extends the service life of the plate heat exchanger. Attached Figure Description

[0007] Figure 1 This is a schematic diagram illustrating the gap created by the offset between the cylindrical filter screen and the inlet in the prior art.

[0008] Figure 2 This is a schematic diagram of the plate heat exchanger with a cylindrical filter screen fixing bracket before installation.

[0009] Figure 3 This is a schematic diagram of the installation of the mounting bracket and the cylindrical filter screen in a plate heat exchanger with a cylindrical filter screen mounting bracket according to the present invention.

[0010] Figure 4 This is a schematic diagram of the fixing frame in a plate heat exchanger with a cylindrical filter screen fixing frame according to the present invention. Detailed Implementation

[0011] The present invention will be further described below with reference to embodiments, but the present invention is not limited to these embodiments. Any similar variations using the present invention should be included within the protection scope 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 clear description and is not intended to limit the technical solution of the present invention.

[0012] like Figures 2-4As shown, this utility model discloses a plate heat exchanger with a cylindrical filter screen holder, comprising a fixed plate 1 and a movable plate 2 arranged in parallel. The movable plate 2 and the fixed plate 1 are connected by bolts and nuts. The fixed plate 1 is provided with an inlet 3 and an outlet (not shown in the figure). A transverse flow channel 4 is provided between the fixed plate 1 and the movable plate 2. Several heat exchange plates 5 are arranged in parallel and spaced above the transverse flow channel 4 between the movable plate 2 and the fixed plate 1. A vertical flow channel 6 is formed between the heat exchange plates 5. The inlet 3 is sequentially connected to the transverse flow channel 4, the vertical flow channel 6, and the outlet. A cylindrical filter screen 7 is inserted into the rear end of the flow channel 4. The rear end of the cylindrical filter screen 7 is closed and a first limiting plate 8 is provided. The first limiting plate 8 is located behind the movable plate 2. The front end of the cylindrical filter screen 7 extends forward into the inlet 3. A fixing frame is inserted into the inlet 3. The fixing frame includes a second limiting plate 9. The second limiting plate 9 is provided with a through hole. An annular fixing plate 10 is connected to the rear side of the through hole. The outer diameter of the annular fixing plate 10 is smaller than the inner diameter of the cylindrical filter screen 7. The second limiting plate 9 is located in front of the fixing plate 1. The annular fixing plate 10 is fixed on the inner wall of the cylindrical filter screen 7.

[0013] Furthermore, such as Figure 4 As shown, the annular fixing plate 10 is composed of an annular conical plate.

[0014] Specifically, the specific structure and principle of the components such as the fixed plate 1, movable plate 2, transverse flow channel 4, heat exchange plate 5, and vertical flow channel 6 in this embodiment, as well as other aspects not described in detail, all adopt well-known solutions in the prior art, which are already understood by those skilled in the art and will not be elaborated here.

[0015] The working principle of this embodiment:

[0016] The outer diameter of the annular fixing plate 10 is smaller than the inner diameter of the cylindrical filter screen 7, allowing it to be easily inserted into the front end of the cylindrical filter screen 7. After the cylindrical filter screen 7 is installed, as... Figure 2 As shown, the fixing bracket is combined and fixed to the cylindrical filter screen 7 at the inlet 3. After installation, it is as follows: Figure 3 As shown, during operation, the medium follows... Figure 3 The medium flows in the direction of the arrow, entering the interior of the cylindrical filter screen 7 through the through hole of the second limiting plate 9 and the annular fixing plate 10. After being filtered by the cylindrical filter screen 7, it enters the vertical flow channel 6, thus ensuring that the medium enters the plate heat exchanger after being filtered by the cylindrical filter screen 7, and does not enter the gap between the cylindrical filter screen 7 and the inlet 3. This protects the normal operation of the equipment, reduces the number of maintenance and cleaning operations, and extends the service life of the plate heat exchanger.

[0017] The annular conical plate can be inserted into the cylindrical filter screen 7 more easily, facilitating the installation of the fixing frame.

Claims

1. A plate heat exchanger with a cylindrical filter screen holder, characterized in that, The device includes a fixed plate and a movable plate arranged in parallel, connected by bolts and nuts. The fixed plate has an inlet and an outlet. A transverse flow channel is provided between the fixed plate and the movable plate. Several heat exchange plates are arranged parallel and spaced above the transverse flow channel between the movable plate and the fixed plate, forming a vertical flow channel between the heat exchange plates. The inlet is sequentially connected to the transverse flow channel, the vertical flow channel, and the outlet. A cylindrical filter screen is inserted at the rear end of the transverse flow channel. The rear end of the cylindrical filter screen is closed and equipped with a first limiting plate located behind the movable plate. The front end of the cylindrical filter screen extends forward into the inlet, where a fixed frame is inserted. The fixed frame includes a second limiting plate with a through hole. An annular fixed plate is connected to the rear side of the through hole. The outer diameter of the annular fixed plate is smaller than the inner diameter of the cylindrical filter screen. The second limiting plate is located in front of the fixed plate, and the annular fixed plate is fixed to the inner wall of the cylindrical filter screen.

2. A plate heat exchanger with a cylindrical filter screen holder according to claim 1, characterized in that, The annular fixing plate is composed of an annular conical plate.

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