Backwash plate heat exchanger unit

Abstract

The utility model discloses a backwash plate heat exchanger unit, comprising a plate heat exchanger body and four pipe connections arranged on the left side surface of the plate heat exchanger body, each of the pipe connections is connected to an external pipeline through a flange, and each of the pipe connections is provided with a protective mechanism, the protective mechanism comprising a base ring slidably sleeved on the surface of the pipe connection, a protective sleeve fixed on the left side surface of the base ring, the protective sleeve covers the flange connection between the pipe connection and the external pipeline on the inner side, and the protective mechanism also includes a limiting structure; the utility model improves and optimizes the backwash plate heat exchanger unit in the prior art, and designs a protective mechanism on the basis of its original structure, which can effectively wrap and protect the flange connection between the pipe connection and the external pipeline, prevent damage caused by collision with external foreign objects, and ensure the connection stability and use stability of the entire backwash plate heat exchanger unit.

Description

Technical Field

[0001] The utility model belongs to the technical field of plate heat exchangers, and in particular relates to a backwashing plate heat exchange unit. Background Art

[0002] As a low-temperature waste heat source, blast furnace slag water has the characteristics of low temperature and large flow. When blast furnace slag water is discharged, the temperature is about 85°C, and the heat can be transferred to heating water at above 60°C. It is very suitable for heating factories or residents. However, slag water contains a large amount of impurities. The existing blast furnace slag water heat exchanger is often blocked and cannot operate stably for a long time. Therefore, some heat exchange units will use backwashing to prevent blockage, such as the existing patent with publication number CN210346468U disclosed in "A heat exchanger with backwashing function. The heat exchanger with backwashing function includes a heat exchanger body, and a first backwashing device is provided on the primary side of the heat exchanger body. The inlet pipe and the first backwash return pipe are provided on the secondary side of the heat exchanger body; the first and second filter tanks are provided outside the heat exchanger body, the inlet of the first filter tank is connected to the first backwash return pipe, the inlet of the second filter tank is connected to the second backwash return pipe, and the outlets of the first and second filter tanks are connected to the clean liquid tank through pipes. It can be seen that the application describes a backwash plate heat exchanger unit, the overall pipeline adopts a backwash design, and the backwashing during operation is realized by controlling the electric ball valve through the PLC. The forward operation is set to 60 minutes and the reverse operation is set to 20 minutes, which can achieve the effect of backwashing and anti-blocking.

[0003] When the backwash plate heat exchanger unit in the above-mentioned patent is actually used, there is no protective structure designed at the connection between the pipe port and the external pipe flange, which causes the connection between the pipe port and the external pipe flange to be exposed to the outside for a long time and is easily damaged by collision with foreign objects, thereby reducing the connection stability and use stability of the entire backwash plate heat exchanger unit. For this reason, the utility model needs to improve and optimize the existing backwash plate heat exchanger unit. Utility Model Content

[0004] The purpose of the utility model is to provide a backwash plate heat exchange unit 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 backwash plate heat exchanger unit, comprising a plate heat exchanger body and four pipe connections arranged on the left side surface of the plate heat exchanger body, each of the pipe connections is connected to an external pipeline through a flange, and each of the pipe connections is provided with a protective mechanism, the protective mechanism comprises a base ring slidably mounted on the surface of the pipe connection, a protective sleeve is fixed to the left side surface of the base ring, the protective sleeve covers the flange connection between the pipe connection and the external pipeline on the inner side, and the protective mechanism also includes a limiting structure.

[0006] Preferably, the limiting structure includes two inner slide grooves opened inside the base ring, a spring and an inner slide block are arranged in the inner slide groove, a limiting block is fixed to one side surface of the inner slide block, a limiting groove corresponding to the limiting block is opened on the surface of the pipe port, the end of the limiting block passes through the limiting groove, a connecting rod is fixed to the other side surface of the inner slide block, the end of the connecting rod passes through the outer surface of the base ring and is fixed with a pull block.

[0007] Preferably, a rod hole communicating with the inner slide groove is formed on the outer surface of the base ring, and the rod hole corresponds to the connecting rod.

[0008] Preferably, one end of the spring abuts against the surface of the inner sliding block, and the other end of the spring abuts against the inner wall of the inner sliding groove.

[0009] Preferably, two strip sliders are symmetrically fixed to the inner wall of the base ring, and two strip slide grooves corresponding to the strip sliders are symmetrically provided on the surface of the pipe connection port, and the strip slider is slidably located in the strip slide groove, and a rubber seat is embedded in the inner wall of the right end of the strip slide groove, and a positioning protrusion is provided on the surface of the rubber seat, and a positioning groove corresponding to the positioning protrusion is provided on the surface of the strip slider, the rubber seat and the positioning protrusion are an integrated structure, and an elliptical cavity is provided in the rubber seat.

[0010] Compared with the prior art, the beneficial effects of the utility model are as follows: the utility model improves and optimizes the backwash plate heat exchanger unit in the prior art, and designs a protective mechanism based on its original structure, which can effectively wrap and protect the flange connection between the pipe port and the external pipeline, prevent damage caused by collision with foreign objects, and ensure the connection stability and use stability of the entire backwash plate heat exchanger unit. At the same time, the protective mechanism can subsequently slide directly sideways to facilitate the subsequent inspection and maintenance of the flange connection between the pipe port and the external pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a three-dimensional diagram of the utility model;

[0012] Figure 2 For this utility model Figure 1 A partial enlarged view of the middle A area;

[0013] Figure 3 It is a front cross-sectional view of the protection mechanism of the utility model;

[0014] Figure 4 For this utility model Figure 3 A partial enlarged view of the middle B area;

[0015] Figure 5It is a top sectional view of the protection mechanism of the utility model;

[0016] In the figure: 1. Plate heat exchanger body; 2. Pipe connection port; 21. Strip slide groove; 22. Rubber seat; 23. Positioning protrusion; 3. Protection mechanism; 31. Base ring; 32. Protection sleeve; 33. Limiting structure; 331. Inner slide groove; 332. Spring; 333. Inner slider; 334. Limiting block; 335. Limiting slot; 336. Connecting rod; 337. Pull block; 34. Strip slide; 341. Positioning slot; 4. External pipeline. DETAILED DESCRIPTION

[0017] 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.

[0018] Example 1

[0019] See also Figures 1 to 4 , which is the first embodiment of the utility model, and this embodiment provides a technical solution: a backwash plate heat exchanger unit, comprising a plate heat exchanger body 1 and four pipe connections 2 arranged on the left side surface of the plate heat exchanger body 1, the pipe connection 2 at the upper left corner is a heating water inlet, the pipe connection 2 at the lower left corner is a heating water outlet, the pipe connection 2 at the upper right corner is a slag water outlet, and the pipe connection 2 at the lower right corner is a slag water inlet, each pipe connection 2 is connected to an external pipe 4 through a flange, and each external pipe 4 is connected to a ball valve, and each pipe connection 2 is provided with a protective mechanism 3, the protective mechanism 3 comprises a base ring 31 slidably sleeved on the surface of the pipe connection 2, a protective sleeve 32 is welded and fixed on the left side surface of the base ring 31, the protective sleeve 32 covers the flange connection between the pipe connection 2 and the external pipe 4 on the inner side, and can effectively wrap and protect the flange connection between the pipe connection 2 and the external pipe 4 to prevent damage caused by collision with external foreign objects, and the protective mechanism 3 also includes a limiting structure 33.

[0020] The limiting structure 33 includes two inner slide grooves 331 provided inside the base ring 31, a spring 332 and an inner slide block 333 are arranged in the inner slide grooves 331, a limiting block 334 is fixed on one side surface of the inner slide block 333, a limiting groove 335 corresponding to the limiting block 334 is provided on the surface of the pipe port 2, the end of the limiting block 334 penetrates into the limiting groove 335, so as to realize stable limiting of the base ring 31 and the protective sleeve 32 during daily use, a connecting rod 336 is fixed on the other side surface of the inner slide block 333, the end of the connecting rod 336 penetrates into the outer surface of the base ring 31 and is fixed with a pull block 33 7, it is convenient for subsequent operators to pull the limit block 334 through the pull block 337. If the flange connection between the pipe port 2 and the external pipe 4 needs to be inspected and maintained in the future, it is only necessary to pull the pull block 337 first, so that the connecting rod 336 moves with the inner slider 333, and the end of the limit block 334 moves out of the limit groove 335, so that the limit on the base ring 31 can be released. At this time, the base ring 31 can be slid to the right end of the pipe port 2, so that the protective sleeve 32 no longer covers the flange connection between the pipe port 2 and the external pipe 4 on the inside, so that the flange connection between the pipe port 2 and the external pipe 4 is exposed, which is convenient for maintenance.

[0021] The outer surface of the base ring 31 is provided with a rod hole communicating with the inner slide groove 331 , and the rod hole corresponds to the connecting rod 336 , so that the connecting rod 336 can pass through smoothly.

[0022] One end of the spring 332 abuts against the surface of the inner sliding block 333 , and the other end of the spring 332 abuts against the inner wall of the inner sliding groove 331 .

[0023] Example 2

[0024] See also Figures 1 to 5 , which is the second embodiment of the utility model, is based on the previous embodiment, and the difference is that the auxiliary limiting after the subsequent right sliding of the base ring 31 can be achieved by setting the rubber seat 22, the positioning protrusion 23 and the positioning groove 341.

[0025] Specifically, two strip sliders 34 are symmetrically fixed on the inner wall of the base ring 31, and two strip slide grooves 21 corresponding to the strip sliders 34 are symmetrically opened on the surface of the pipe connection port 2. The strip sliders 34 slide in the strip slide grooves 21 to achieve guide limitation when the base ring 31 slides, thereby preventing the base ring 31 from rotating.

[0026] Among them, a rubber seat 22 is embedded in the inner wall of the right end of the strip slide groove 21, and a positioning protrusion 23 is provided on the surface of the rubber seat 22. A positioning groove 341 corresponding to the positioning protrusion 23 is opened on the surface of the strip slider 34, so that when the subsequent operator slides the base ring 31 to the right, the strip slider 34 will slide to the right end of the strip slide groove 21, and the positioning protrusion 23 will be squeezed into the positioning groove 341, thereby realizing auxiliary limiting after the base ring 31 and the protective sleeve 32 slide to the right.

[0027] The rubber seat 22 and the positioning protrusion 23 are an integrated structure, both of which are made of rubber material and will undergo elastic deformation when squeezed. An elliptical cavity is provided in the rubber seat 22, so that the positioning protrusion 23 has sufficient deformation space when squeezed.

[0028] The structural principles of the plate heat exchanger body 1 of the utility model are all known technologies that have been disclosed in existing patents. For details, please refer to the existing patent with publication number CN210346468U, which will not be described in detail here.

[0029] Although the embodiments of the present invention have been shown and described (see the above detailed description for details), it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A backwash plate heat exchanger unit, comprising a plate heat exchanger body (1) and four pipe connections (2) arranged on the left side surface of the plate heat exchanger body (1), each pipe connection (2) being connected to an external pipe (4) via a flange, characterized in that: A protective mechanism (3) is provided on each of the pipe connection ports (2), the protective mechanism (3) comprising a base ring (31) slidably sleeved on the surface of the pipe connection port (2), a protective sleeve (32) being fixed to the left surface of the base ring (31), the protective sleeve (32) covering the flange connection between the pipe connection port (2) and the external pipeline (4) on the inner side, and the protective mechanism (3) further comprising a limiting structure (33).

2. A backwash plate heat exchanger unit according to claim 1, characterized in that: The limiting structure (33) comprises two inner slide grooves (331) provided inside the base ring (31), a spring (332) and an inner slide block (333) being provided inside the inner slide grooves (331), a limiting block (334) being fixed on one side surface of the inner slide block (333), a limiting groove (335) corresponding to the limiting block (334) being provided on the surface of the pipe connection port (2), and an end of the limiting block (334) passing through the limiting groove (335).

3. A backwash plate heat exchanger unit according to claim 2, characterized in that: A connecting rod (336) is fixed to the other side surface of the inner sliding block (333), and the end of the connecting rod (336) penetrates the outer side surface of the base ring (31) and is fixed to a pulling block (337).

4. A backwash plate heat exchanger unit according to claim 2, characterized in that: The outer surface of the base ring (31) is provided with a rod hole communicating with the inner slide groove (331), and the rod hole corresponds to the connecting rod (336).

5. The backwash plate heat exchanger unit according to claim 2, characterized in that: One end of the spring (332) abuts against the surface of the inner sliding block (333), and the other end of the spring (332) abuts against the inner wall of the inner sliding groove (331).

6. The backwash plate heat exchanger unit according to claim 1, characterized in that: Two strip-shaped sliding blocks (34) are symmetrically fixed on the inner wall of the base ring (31), and two strip-shaped sliding grooves (21) corresponding to the strip-shaped sliding blocks (34) are symmetrically provided on the surface of the pipe connection port (2), and the strip-shaped sliding blocks (34) are slidably located in the strip-shaped sliding grooves (21).

7. A backwash plate heat exchanger unit according to claim 6, characterized in that: A rubber seat (22) is embedded in the inner wall of the right end of the strip-shaped slide groove (21), a positioning protrusion (23) is arranged on the surface of the rubber seat (22), and a positioning groove (341) corresponding to the positioning protrusion (23) is opened on the surface of the strip-shaped slide block (34).

8. The backwash plate heat exchanger unit according to claim 7, characterized in that: The rubber seat (22) and the positioning protrusion (23) are an integrated structure, and an elliptical cavity is provided in the rubber seat (22).

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