Thermal shock resistant plate-fin heat exchanger

Abstract

The utility model relates to the technical field of heat exchangers, in particular to a thermal shock resistant plate-fin heat exchanger, which comprises a heat exchanger main body and a buffer cavity arranged on an inlet on one side of the heat exchanger main body, an end cover is detachably mounted on one side of the buffer cavity, a medium inlet is arranged on the end cover, and a filter part is movably mounted in the buffer cavity. A buffer cavity is formed in the end cover, the filter part divides the interior of the buffer cavity into two independent cavities, a buffer structure is arranged on the side, away from the end cover, of the filter part, the buffer structure comprises a plurality of guide rods fixed to the inner side wall of the buffer cavity and springs connected to the outer sides of the guide rods in a sleeving mode, and sliding holes matched with the guide rods are formed in the filter part in a penetrating mode; one end of the guide rod penetrates through the sliding hole to extend to the side, close to the end cover, of the filtering piece, a first limiting plate is fixed to the guide rod, when a heat exchange medium enters the filtering piece, the buffering effect can be achieved through the buffering structure, meanwhile, part of impurities in the medium can be filtered out through the filtering piece, and damage to the heat exchanger is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchangers, in particular to a heat shock resistant plate-fin heat exchanger. Background Art

[0002] Plate-fin heat exchangers are usually composed of baffles, fins, seals, and guide vanes. Fins, guide vanes, and seals are placed between two adjacent baffles to form a sandwich, called a channel. Such sandwiches are stacked up according to different fluids and brazed into a whole to form a plate bundle, which is the core of the plate-fin heat exchanger.

[0003] In the Chinese Patent Literature Library, a patent with authorization announcement number CN221198124U discloses a heat-shock-resistant plate-fin heat exchanger. By setting a buffer box, a piston, an elastic diaphragm, a telescopic spring, etc., when the fluid enters the buffer box, the impact force of the fluid can be reduced to avoid damage to the heat exchanger. In actual use, the function is relatively simple. When the fluid contains more impurities, the impact on the heat exchanger may still cause damage to the heat exchanger. Summary of the invention

[0004] The utility model aims to provide a heat shock resistant plate-fin heat exchanger to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a heat shock resistant plate-fin heat exchanger, comprising a heat exchanger body and a buffer chamber arranged on the inlet on one side of the heat exchanger body, one side of the buffer chamber is detachably installed with an end cover, and a medium inlet is arranged on the end cover, a filter element is movably installed inside the buffer chamber, and the filter element divides the inside of the buffer chamber into two independent cavities, a buffer structure is arranged on the side of the filter element away from the end cover, and the buffer structure includes a plurality of guide rods fixed on the inner side wall of the buffer chamber and a spring sleeved on the outside of the guide rod, a sliding hole matching the guide rod is penetrated on the filter element, one end of the guide rod extends through the sliding hole to the side of the filter element close to the end cover, and a first limit plate is fixed thereto.

[0006] Furthermore, the filter element is a columnar structure with an opening at one end, and the opening is located at an end close to the end cover. A plurality of filter holes are arranged on the outer peripheral wall of the filter element. The size of the filter element is smaller than the size of the buffer cavity. A positioning ring is vertically extended from the end of the filter element close to the opening, and the positioning ring abuts against the inner wall of the buffer cavity.

[0007] Furthermore, the first limiting plate is an integrated frame-shaped structure, and the outer peripheral wall of the first limiting plate is tightly attached to the inner peripheral wall of the filter element.

[0008] Furthermore, a second limit plate is fixed on each of the guide rods, and a gap is reserved between the second limit plate and the end of the guide rod, and both ends of the spring are respectively in contact with the second limit plate and the filter element.

[0009] Furthermore, a slag discharge port is provided on the end cover, and a sealing cover is threadedly connected to the slag discharge port.

[0010] Furthermore, the end cover is connected to the buffer chamber via a flange.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] By setting the filter element and the buffer structure, when the heat exchange medium enters the filter element, the buffer structure can play a buffering role, and the filter element can filter out some impurities in the medium, further reducing the damage to the heat exchanger;

[0013] By providing the first limiting plate, when the filter element slides inside the buffer cavity, impurities on the inner wall of the filter element can be automatically scraped off, thereby reducing the clogging of the filter element. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the cross-sectional structure of the buffer chamber of the utility model;

[0016] Figure 3 It is a partial explosion schematic diagram of the utility model.

[0017] In the figure: 1. heat exchanger body; 2. buffer chamber; 201. liquid outlet; 3. filter element; 301. positioning ring; 302. sliding hole; 4. buffer structure; 401. guide rod; 4011. second limit plate; 402. spring; 403. first limit plate; 5. end cover; 501. medium inlet; 502. slag discharge port. DETAILED DESCRIPTION

[0018] 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. In the description of the utility model, it should be noted that the terms "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the utility model. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" can explicitly or implicitly include at least one of the features. In order to make the terms "including" and any variations of them in the specification and claims of the utility model and the above-mentioned drawings, it is intended to cover non-exclusive inclusions.

[0019] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. In addition, in the description of the present utility model, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present utility model and simplifying the description, and does 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 utility model.

[0020] See also Figure 1-3The utility model provides an embodiment: a heat shock resistant plate-fin heat exchanger, comprising a heat exchanger body 1 and a buffer chamber 2 arranged on an inlet on one side of the heat exchanger body 1. The specific structure of the heat exchanger body 1 is the prior art. In this embodiment, the left and right sides of the heat exchanger body 1 are respectively provided with a medium inlet and an outlet, and the front and rear sides are respectively provided with an inlet and an outlet of another medium to be heat exchanged. The two media enter the heat exchanger body 1 from different directions to realize heat exchange and then discharge. The buffer chamber 2 is specifically a cylindrical structure. An outlet 201 is provided at one axial end of the buffer chamber 2. The outlet 201 is connected to the medium inlet on the right side of the heat exchanger body 1. An end cover 5 is detachably installed at the other axial end of the buffer chamber 2. The end cover 5 is connected to the buffer chamber 2 by threads or flanges, and a medium inlet 501 is provided on the end cover 5. In this embodiment, the end cover 5 is connected to the buffer chamber 2 by flanges, and a slag discharge port 502 is also provided on the end cover 5, and a sealing cover is threadedly connected to the slag discharge port 502. Slag discharge can be realized by opening and closing the sealing cover, and there is no need to disassemble and assemble the end cover 5.

[0021] A filter element 3 is movably installed inside the buffer chamber 2, and the filter element 3 divides the inside of the buffer chamber 2 into two independent cavities. In the present embodiment, the filter element 3 is a cylindrical structure with an opening at one end, and its coaxial line is arranged inside the buffer chamber 2, and the bottom radius and height of the filter element 3 are both smaller than the bottom radius and height of the buffer chamber 2. The opening of the filter element 3 is located at the end close to the end cover 5, and a plurality of filter holes are arranged on the outer circumferential wall of the filter element 3, and a positioning ring 301 is vertically extended from the end of the filter element 3 close to the opening, and the positioning ring 301 abuts against the inner wall of the buffer chamber 2, and the positioning ring 301 divides the inside of the buffer chamber 2 into two independent left and right chambers. Furthermore, in order to improve the sealing effect, a sealing ring can be arranged on the abutting surface between the positioning ring 301 and the buffer chamber 2. During operation, the medium first enters the inside of the filter element 3 through the medium inlet 501, and after filtering, enters the inside of the buffer chamber 2 through the filter holes on the outer circumferential wall of the filter element 3.

[0022] A buffer structure 4 is provided on the side of the filter element 3 away from the end cover 5, and the buffer structure 4 includes a plurality of guide rods 401 fixed on the inner wall of the buffer chamber 2 and a spring 402 sleeved on the outer side of the guide rod 401. A sliding hole 302 matching the guide rod 401 is provided at one end of the filter element 3 away from the opening. One end of the guide rod 401 extends through the sliding hole 302 to the inside of the filter element 3 and is fixed with a first limit plate 403. The spring 402 can play a certain buffering role. The filter element 3 can play a guiding and limiting role by sliding back and forth along the length direction of the guide rod 401. The first limit plate 403 is an integrated frame structure. When no medium is passed, under the elastic support of the spring 402, the first limit plate 403 abuts against the end of the inside of the filter element 3 away from the opening, and one end of a plurality of guide rods 401 are fixedly connected to the first limit plate 403. The outer peripheral wall of the first limit plate 403 is tightly attached to the inner peripheral wall of the filter element 3. The first limit plate 403 can play a limiting role to prevent the guide rod 401 from separating from the filter element 3. At the same time, when the first limit plate 403 and the filter element 3 slide relative to each other, impurities adhering to the inner wall of the filter element 3 can be automatically scraped off. Furthermore, in order to improve the cleaning effect, a cleaning bristle can be set on the outer circumferential surface of the first limit plate 403.

[0023] A second limit plate 4011 is fixed on the guide rod 401, and a gap is reserved between the second limit plate 4011 and the end of the guide rod 401. The two ends of the spring 402 are respectively abutted against the second limit plate 4011 and the filter element 3, so that a distance between the end of the filter element 3 and the liquid outlet 201 can be reserved to avoid blockage of the liquid outlet 201.

[0024] Working principle: When working, the heat exchange medium enters the interior of the buffer chamber 2 through the medium inlet 501, and enters the interior of the filter element 3 through the opening at one end of the filter element 3. When the medium flow rate is large, it impacts the filter element 3, and the filter element 3 compresses the spring 402 to play a buffering role. At the same time, the filter element 3 filters out impurities in the medium, and the filtered medium escapes to the interior of the buffer chamber 2 through the filter holes on the filter element 3, and then enters the interior of the heat exchanger body 1 through the liquid outlet 201 for heat exchange. When stopping working, the spring 402 pushes the filter element 3 to slide and reset along the length direction of the guide rod 401, and the first limit plate 403 slides relative to the filter element 3, automatically scraping off impurities adhering to the inner wall of the filter element 3, and opening the sealing plug of the slag discharge port 502, and passing clean water into the medium inlet 501 for cleaning, and the slag discharge port 502 discharges sewage.

[0025] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A heat shock resistant plate-fin heat exchanger, comprising a heat exchanger body (1) and a buffer chamber (2) arranged on an inlet of one side of the heat exchanger body (1), characterized in that: An end cover (5) is detachably mounted on one side of the buffer chamber (2), and a medium inlet (501) is arranged on the end cover (5); a filter element (3) is movably mounted inside the buffer chamber (2), and the filter element (3) divides the inside of the buffer chamber (2) into two independent cavities; a buffer structure (4) is arranged on a side of the filter element (3) away from the end cover (5), and the buffer structure (4) comprises a plurality of guide rods (401) fixed on the inner side wall of the buffer chamber (2) and a spring (402) sleeved on the outer side of the guide rod (401); a sliding hole (302) matching the guide rod (401) is penetrated through the filter element (3); one end of the guide rod (401) passes through the sliding hole (302) and extends to a side of the filter element (3) close to the end cover (5), and is fixed with a first limit plate (403).

2. The thermal shock resistant plate-fin heat exchanger according to claim 1, characterized in that: The filter element (3) is a columnar structure with an opening at one end, and the opening is located at an end close to the end cover (5). A plurality of filter holes are provided on the outer peripheral wall of the filter element (3). The size of the filter element (3) is smaller than the size of the buffer cavity (2). A positioning ring (301) is vertically extended from the end of the filter element (3) close to the opening, and the positioning ring (301) abuts against the inner wall of the buffer cavity (2).

3. The thermal shock resistant plate-fin heat exchanger according to claim 1, characterized in that: The first limiting plate (403) is an integrated frame-shaped structure, and the outer peripheral wall of the first limiting plate (403) is tightly attached to the inner peripheral wall of the filter element (3).

4. The thermal shock resistant plate-fin heat exchanger according to claim 1, characterized in that: The guide rods (401) are each fixed with a second limit plate (4011), and a gap is reserved between the second limit plate (4011) and the end of the guide rod (401), and the two ends of the spring (402) are respectively in contact with the second limit plate (4011) and the filter element (3).

5. The thermal shock resistant plate-fin heat exchanger according to claim 1, characterized in that: The end cover (5) is provided with a slag discharge port (502), and a sealing cover is threadedly connected to the slag discharge port (502).

6. The thermal shock resistant plate-fin heat exchanger according to claim 1, characterized in that: The end cover (5) is connected to the buffer chamber (2) via a flange.

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