Cleaning and dredging device for shell-and-tube heat exchanger

Abstract

The utility model discloses a cleaning and dredging device for a shell-and-tube heat exchanger, which is characterized by comprising a base and a cleaning rod piece, one end of the base is annularly buckled at the end part of a heat exchanger tube bundle and is provided with a conical hole coaxial with a heat exchange tube on the heat exchanger tube bundle, one end of the conical hole is the same as the heat exchange tube in inner diameter, and the other end of the conical hole is larger than the heat exchange tube in inner diameter; the outer diameter of the cleaning rod piece is matched with the inner diameter of the heat exchange tube, a water hole is formed in the center of the cleaning rod piece, and the cleaning rod piece gradually stretches into the heat exchange tube from the conical hole in the base to clean the interior of the heat exchange tube. The heat exchange tube cleaning device can thoroughly clean the heat exchange tube in a through mode, and has the advantages of being good in convenience, thorough in cleaning and easy to operate.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchanger cleaning, in particular to a shell and tube heat exchanger cleaning and unblocking device. Background Art

[0002] Shell and tube heat exchangers are widely used in heat exchange in the production process of steel enterprises. They use the wall of the tube bundle enclosed in the shell as the heat transfer surface. They have the characteristics of simple structure and low cost. In actual production, since the heat exchange tubes of tube bundle heat exchange equipment are long and the tube spacing is small, it is difficult to clean the heat exchange tubes after scaling. If the scale is not cleaned for a long time, the heat exchange tubes will be completely blocked, affecting the heat exchange efficiency. This is also an inevitable problem for all liquid phase heat exchange equipment. Blockage of heat exchange equipment will not only reduce production efficiency, but also affect energy conservation and emission reduction. Most of the existing cleaning methods use a thin water pipe directly inserted into one end of the heat exchange tube for flushing. Since the heat exchange tube is long in size and easy to scale inside, this method can only clean some loosely bonded scaling or adhesions. Utility Model Content

[0003] The utility model is used to overcome the defects of the prior art and provide a shell and tube heat exchanger cleaning and unblocking device to solve the problems mentioned in the background technology.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A shell and tube heat exchanger cleaning and unblocking device comprises a base and a cleaning rod; one end of the base is buckled on the end of the heat exchanger, and a conical hole coaxial with the heat exchange tube on the heat exchanger is provided thereon, one end of the conical hole is the same as the inner diameter of the heat exchange tube, and the inner diameter of the other end is larger than the inner diameter of the heat exchange tube; the outer diameter of the cleaning rod matches the inner diameter of the heat exchange tube, and a water hole is provided at the center thereof, and the cleaning rod gradually penetrates into the heat exchange tube from the conical hole on the base to clean the inside of the heat exchange tube.

[0006] The above-mentioned shell and tube heat exchanger cleaning and unblocking device, the cleaning rod is a segmented structure, consisting of a first cleaning rod and a second cleaning rod connected to each other; the first cleaning rod is provided with a drill bit at the head, and the first cleaning rod is provided with bristles; the second cleaning rod is provided with a crank at the tail, and the tail end of the second cleaning rod is connected to a high-pressure water source through a cleaning water pipe, and a valve is provided between the second cleaning rod and the cleaning water pipe; the first cleaning rod and the second cleaning rod are provided with water holes that are interconnected in the center.

[0007] The above-mentioned shell and tube heat exchanger cleaning and unblocking device, the first cleaning rod is also provided with a flushing hole connected to the central water hole, the water spraying direction of the flushing hole is at an angle of 45 degrees with the axis of the heat exchange tube, and the flushing hole and the bristles are arranged at intervals along the first cleaning rod.

[0008] The above-mentioned shell and tube heat exchanger cleaning and unblocking device is provided with a detachable support pad assembly between the conical hole mouth of the base and the cleaning rod, and the support pad assembly is composed of two semicircular structure gaskets, and the semicircular structure gasket is composed of an outer shell and an inner lining graphite layer, the arc surface of the graphite layer matches the outer cylindrical surface of the cleaning rod, and the outer shell has a certain taper to match the conical hole.

[0009] In the above-mentioned shell and tube heat exchanger cleaning and unblocking device, the second cleaning rods are provided with 1-3 pieces, or the number of the second cleaning rods is increased according to the length of the heat exchange tube, and the second cleaning rods are connected to each other.

[0010] The above-mentioned shell and tube heat exchanger cleaning and unblocking device has a hole at the center of the drill bit, which is connected to the water hole of the first cleaning rod. Beneficial Effects

[0011] The beneficial effects of the utility model are as follows: First, the base is buckled at the end of the heat exchange tube bundle, and the base is provided with a tapered hole, which is conducive to the smooth insertion of the cleaning rod into the heat exchange tube with a smaller inner diameter, and at the same time provides support for the reciprocating movement and rotation of the cleaning rod inside the heat exchange tube, which is conducive to the operation of the slender cleaning rod to thoroughly clean the heat exchange tube. Second, the cleaning rod is set as a segmented structure, which can be used to flush the heat exchange tubes of different lengths, and is convenient for operation. The drill bit set at the head of the first cleaning rod can effectively impact and scrape the scale, and then flush it with the cleaning water sprayed from the hole set in the center. Third, the flushing hole set on the first cleaning rod cooperates with the bristles, which is conducive to the thorough removal of scale and increases the smoothness of the inner surface of the heat exchange tube. After the smoothness is increased, it is not easy to form scale. Fourth, a detachable support pad assembly is arranged between the conical hole of the base and the cleaning rod. After the cleaning rod is inserted into the heat exchange tube, the two semicircular gaskets can be buckled on the outside of the cleaning rod and inserted into the conical hole on the base. The graphite layer arranged inside can provide support and lubrication during the transportation of the cleaning rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 It is a partial structural schematic diagram of the utility model;

[0015] Figure 3 It is another partial structural schematic diagram of the utility model;

[0016] Figure 4 This is another partial structural schematic diagram of the utility model;

[0017] The symbols in the figure represent:

[0018] 1. base, 2. first cleaning rod, 3. second cleaning rod, 4. heat exchanger, 5. drill bit, 6. crank, 7. valve, 8. support pad assembly, 1-1. tapered hole, 2-1. flushing hole, 4-1. heat exchange tube, 8-1. shell, 8-2. graphite layer. DETAILED DESCRIPTION

[0019] The utility model is further described in detail below in conjunction with the drawings and embodiments.

[0020] like Figure 1-3 As shown, the utility model includes a base 1 and a cleaning rod. One end of the base 1 is buckled on the end of the heat exchanger 4, and a conical hole 1-1 coaxial with the heat exchange tube 4-1 on the heat exchanger 4 is provided on the base 1. One end of the conical hole 1-1 is the same as the inner diameter of the heat exchange tube 4-1, and the inner diameter of the other end is larger than the inner diameter of the heat exchange tube 4-1. There are a number of heat exchange tubes arranged along the axial direction inside the heat exchanger 4. One end of the base 1 can be buckled on the flange at the end of the heat exchanger 4, and then the base can be locked with the flange at the end of the heat exchanger 4 by tightening the bolts passing through the base. The base is buckled on the end of the heat exchange tube bundle, and the conical hole is provided on the base, which is conducive to the smooth insertion of the cleaning rod into the heat exchange tube with a smaller inner diameter. At the same time, it provides support for the reciprocating movement and rotation of the cleaning rod inside the heat exchange tube, which is conducive to the operation of the slender cleaning rod to thoroughly clean the heat exchange tube. The number of the tapered holes 1 - 1 is the same as the number of the heat exchange tubes 4 - 1 , and they are coaxially matched one by one.

[0021] The outer diameter of the cleaning rod matches the inner diameter of the heat exchange tube 4-1, and a water hole is provided at its center. The cleaning rod gradually penetrates into the heat exchange tube 4-1 from the tapered hole 1-1 on the base 1 to clean the inside of the heat exchange tube.

[0022] Since the heat exchange tube 4-1 is slender, in order to facilitate the cleaning operation, the cleaning rod is set as follows: the cleaning rod is a segmented structure, consisting of a first cleaning rod 2 and a second cleaning rod 3 connected to each other; the first cleaning rod 2 is provided with a drill bit 5 at the head, and the first cleaning rod 2 is provided with bristles; the tail of the second cleaning rod 3 is provided with a crank 6, and the tail end of the second cleaning rod 3 is connected to a high-pressure water source through a cleaning water pipe, and a valve 7 is provided between the second cleaning rod 3 and the cleaning water pipe; the first cleaning rod 2 and the second cleaning rod 3 are provided with interconnected water holes in the center. The flushing hole provided on the first cleaning rod cooperates with the bristles, which is conducive to thoroughly removing the scale and increasing the smoothness of the inner surface of the heat exchange tube. After the smoothness is increased, it is not easy to generate scale.

[0023] In order to thoroughly clean the heat exchange tube after the drill bit cleans away large scale, the first cleaning rod is designed as follows: the first cleaning rod 2 is also provided with a flushing hole 2-1 connected to the central water hole, and the water spraying direction of the flushing hole 2-1 is at an angle of 45 degrees to the axis of the heat exchange tube 4-1, and the flushing hole 2-1 and the bristles are arranged at intervals along the first cleaning rod 2.

[0024] In order to facilitate the rotational cooperation between the cleaning rod and the base, the following design is adopted: a detachable support pad assembly 8 is arranged between the mouth of the tapered hole 1-1 of the base 1 and the cleaning rod, and the support pad assembly 8 is composed of two semicircular gaskets, and the semicircular gasket is composed of an outer shell 8-1 and an inner lining graphite layer 8-2, the arc surface of the graphite layer 8-2 matches the outer cylindrical surface of the cleaning rod, and the outer shell 8-1 has a certain taper, which matches the tapered hole 1-1. After the cleaning rod is inserted into the heat exchange tube, the two semicircular gaskets can be buckled on the outside of the cleaning rod and inserted into the tapered hole on the base, and the graphite layer arranged inside can provide support and lubrication during the rotation of the cleaning rod.

[0025] In order to facilitate the smooth operation of cleaning the scale on the drill bit, a hole is provided in the center of the drill bit 5, which is connected to the water hole of the first cleaning rod 2. The drill bit can be cleaned and flushed with cleaning water.

[0026] The second cleaning rods 3 may adopt a connection structure: 1-3 second cleaning rods 3 are provided, or the number of second cleaning rods 3 is increased according to the length of the heat exchange tube 4-1, and the second cleaning rods 3 are connected to each other, and the connection may adopt a threaded connection or a snap connection.

Claims

1. A shell and tube heat exchanger cleaning and unclogging device, characterized in that: The invention comprises a base (1) and a cleaning rod; one end of the base (1) is buckled on the end of a heat exchanger (4); a conical hole (1-1) coaxial with a heat exchange tube (4-1) on the heat exchanger (4) is provided on the base; one end of the conical hole (1-1) has the same inner diameter as the heat exchange tube (4-1); the other end has an inner diameter greater than the inner diameter of the heat exchange tube (4-1); the outer diameter of the cleaning rod matches the inner diameter of the heat exchange tube (4-1); a water hole is provided at the center of the cleaning rod; the cleaning rod gradually penetrates into the heat exchange tube (4-1) from the conical hole (1-1) on the base (1) to clean the inside of the heat exchange tube.

2. The shell and tube heat exchanger cleaning and unblocking device according to claim 1, characterized in that: The cleaning rod member is of a segmented structure, and is composed of a first cleaning rod (2) and a second cleaning rod (3) which are connected to each other; a drill bit (5) is arranged at the head of the first cleaning rod (2), and bristles are arranged on the first cleaning rod (2); a crank (6) is arranged at the tail of the second cleaning rod (3), and the tail end of the second cleaning rod (3) is connected to a high-pressure water source through a cleaning water pipe, and a valve (7) is arranged between the second cleaning rod (3) and the cleaning water pipe; and water holes which are connected to each other are arranged at the center of the first cleaning rod (2) and the second cleaning rod (3).

3. The shell and tube heat exchanger cleaning and unblocking device according to claim 2, characterized in that: The first cleaning rod (2) is also provided with a flushing hole (2-1) connected to the central water hole, the water spraying direction of the flushing hole (2-1) forms an angle of 45 degrees with the axis of the heat exchange tube (4-1), and the flushing hole (2-1) and the bristles are arranged at intervals along the first cleaning rod (2).

4. The shell and tube heat exchanger cleaning and unblocking device according to claim 1, characterized in that: A detachable support pad assembly (8) is provided between the mouth of the tapered hole (1-1) of the base (1) and the cleaning rod, the support pad assembly (8) comprising two semicircular structured gaskets, the semicircular structured gaskets comprising an outer shell (8-1) and an inner lining graphite layer (8-2), the arc surface of the graphite layer (8-2) matching the outer cylindrical surface of the cleaning rod, and the outer shell (8-1) having a certain taper matching the tapered hole (1-1).

5. The shell and tube heat exchanger cleaning and unblocking device according to claim 2, characterized in that: One to three second cleaning rods (3) are provided, or the number of second cleaning rods (3) is increased according to the length of the heat exchange tube (4-1), and the second cleaning rods (3) are connected to each other.

6. The shell and tube heat exchanger cleaning and unblocking device according to claim 2, characterized in that: The drill bit (5) is provided with a hole at its center, which is connected to the water hole of the first cleaning rod (2).

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