Heat exchange tube cleaning device adopting rolling brush to control speed

Abstract

The utility model discloses a heat exchange tube cleaning device adopting a rolling brush to control speed, and relates to the field of heat exchanger cleaning devices. The industrial evaporator heat exchange tube cleaning spiral generally adopts the mutual action of a hook-headed shaft and a barrier strip to carry out speed reduction control, the speed reduction mode adopts collision blocking speed reduction, the speed reduction effect is uncertain, the constant speed performance of speed reduction is poor, the cleaning acting force on the inner wall of a pipeline is not uniform, and the ideal cleaning effect cannot be obtained. Comprising a flow guide pipe opening frame and a cleaning main shaft, the flow guide pipe opening frame comprises a fixing part, a supporting part, a barrier strip and a bearing part, a shaft handle is arranged at the upper end of the cleaning main shaft, a rolling brush coaxial with the cleaning main shaft is arranged on the shaft handle, and when the rolling brush rotates, the periphery of the rolling brush is decelerated due to blocking of the barrier strip so as to achieve rotation speed control. When the rolling brush rotates, relatively flexible interaction exists between the rolling brush and the barrier strip all the time, uniform rotation control can be achieved, the cleaning stability is improved, and therefore the cleaning effect is improved.

Description

Technical Field

[0001] The utility model relates to the field of heat exchanger cleaning devices, in particular to a heat exchange tube cleaning device which adopts a roller brush to control the speed. Background Art

[0002] During the chemical production process, the dirt formed on the tube wall of the evaporator heat exchanger will seriously affect the heat transfer coefficient, increase energy consumption, and affect production efficiency and capacity.

[0003] At present, the cleaning methods of heat exchanger pipes are mainly chemical cleaning and mechanical cleaning. Crystallized salt scale is hard in texture. For calcium sulfate, sodium sulfide and silicate scale, twist drills are even required. Calcium sulfate, silicate scale, carbonized scale, etc. may cause secondary pollution. Due to the wide variety of solutes, scale is different from the singleness of scale. There is no universal descaling agent, and the price is high, which increases production costs. Some production products cannot add additional chemical descaling agents, the scale formation speed of the pipeline is fast, the risk of pipe blocking is high, and periodic water washing is required. The water washing method can only be used for crystallized salt scale that is easily soluble in water. Using manual steel pipes for cleaning is not only time-consuming and labor-intensive, but also has a large pollution and low cleanliness during the cleaning process, and it is easy to scratch the inner wall surface of the pipe. Using high-pressure water guns and ultra-high-pressure jet cleaning not only has low cleaning cleanliness, but also cannot remove the bottom hard scale, and the cost is high and the parking time is long. Electric, magnetic, and ultrasonic cleaning can often only slow down the formation of scale, but does not solve the fundamental problem. Therefore, rotary spiral cleaning has become a powerful means of cleaning scale on evaporator heat exchange tubes, but the plastic spiral in this method cannot remove harder dirt.

[0004] The mounting bearings currently used in the cleaning elements of the evaporators in chemical plants are generally an elevated structure and a low-frame pipe mouth frame. Both of these mounting bearings currently used rely on the spring structure to produce reciprocating motion of the entire cleaning spiral in the heat exchange tube to achieve the cleaning effect. The flow energy of the fluid itself and the secondary steam energy in the evaporator tube are used as the automatic cleaning power. The fluid forms a water flow in the corresponding direction through the guide pipe mouth frame, driving the spiral multi-dimensional cleaning movement in the heating tube, thereby completing the cleaning of the pipeline. However, in order to avoid excessive speed, this cleaning element generally uses the interaction between the hook shaft and the baffle to decelerate and control. However, since this deceleration method is a rigid hard deceleration, its collision and blocking deceleration effect is greatly affected by other parameters during blocking, there is uncertainty, and the uniform speed performance of the deceleration is poor, resulting in uneven cleaning force on the inner wall of the pipeline, poor cleaning stability, and failure to obtain an ideal cleaning effect. Utility Model Content

[0005] The technical problem to be solved and the technical task proposed by the utility model are to improve and perfect the existing technical solutions, and provide a heat exchange tube cleaning device using a roller brush to control the speed, so as to stably and reliably control the uniform speed movement of the cleaning spiral and improve the cleaning effect. To this end, the utility model adopts the following technical solutions.

[0006] A heat exchange tube cleaning device using a roller brush to control speed comprises a guide tube mouth frame and a cleaning spindle, wherein the guide tube mouth frame comprises a fixing portion, a supporting portion, a baffle and a bearing portion, wherein the supporting portion is located above the fixing portion, and the bearing portion is located in the middle of the upper middle position of the supporting portion, fluid inlets are arranged on the left and right sides of the lower middle portion of the supporting portion, the lower end of the fixing portion is a fluid outlet, baffles are arranged on the side of the supporting portion, a shaft handle is arranged at the upper end of the cleaning spindle, the shaft handle is located on the top surface of the supporting portion, a roller brush coaxial with the cleaning spindle is arranged on the shaft handle, when the roller brush rotates, its periphery will be decelerated due to the obstruction of the baffle to realize rotation speed control, the cleaning spindle passes through the central axis hole of the bearing portion from top to bottom, and extends downward from the lower end of the fixing portion, and the lower end of the cleaning spindle is provided with a hook head connecting hole for connecting with a cleaning spiral. The deceleration control is performed through the mutual blocking effect between the roller brush and the baffle bar. Since the roller brush has a certain flexibility, there is always a relatively flexible interaction with the baffle bar when the roller brush rotates, which can achieve uniform rotation control, ensuring the appropriate cleaning pressure and speed of the cleaning spiral on the inner wall of the heat exchange tube during the cleaning process, improving the stability of cleaning, and thus improving the cleaning effect. In addition, due to the flexible contact, the problem of parts loss is solved to a great extent, and uniform online, continuous cleaning, anti-scaling and convective heat transfer enhancement are achieved, ensuring long-term stable and efficient operation, and achieving the goal of increasing production and saving energy.

[0007] As a preferred technical means: the roller brush adopts a high-density filament structure, and the filaments are arranged radially. The high-density filament structure can make the cleaning element always move at a uniform speed, greatly increasing the cleaning ability of the pipe wall scale, and making the cleaning element work more stably, which can effectively slow down the cleaning element and avoid the situation of forced stop of spiral movement.

[0008] As a preferred technical means: the fixing part is annular, with a wall thickness of 1.5-2.5mm, and an outward flange is provided on the outer periphery of the upper end of the fixing part, the outer diameter of the flange is 3-10mm larger than the inner diameter and inner wall radius of the heat exchange tube, and the fixing part is interference-fitted with the inner wall of the heat exchange tube. This structure can facilitate the connection and fixation of the guide tube mouth frame and the end of the heat exchange tube.

[0009] As a preferred technical means: the side of the fixing part is provided with a fixing ring protruding outward, and the fixing ring is interference-matched with the inner wall of the heat exchange tube. By the fixing ring protruding outward and the inner wall of the heat exchange tube being interference-matched, rather than the entire side wall of the fixing part being interference-matched with the inner wall of the heat exchange tube, on the one hand, interference fit can be achieved, and on the other hand, the difficulty of installation is greatly reduced.

[0010] As a preferred technical means: the middle and lower part of the fixing part is provided with a plurality of cutting grooves which penetrate radially and are open at the lower end. By providing the cutting grooves, the fixing part has a certain radial compression elasticity, which facilitates the installation and fixing of the guide pipe opening frame on the end of the heat exchange pipe.

[0011] As a preferred technical means: the support part includes a support arm, a top ring and a support plate. The support arm is located on the front and rear sides. The lower end of the support arm is an integral structure with the upper end of the fixed part. The top ring is located on the support arm. The shaft handle is supported on the top ring. The top ring and the support arm are the same annular cylinder. The fluid inlet is formed by the side cut grooves on the left and right sides of the support arm passing through the inner cavity of the support part. The support plate is integrally connected to the top of the front and rear support arms, and the bearing part is integrally arranged on the support plate. The top ring is located on the support arm, providing a stable support surface for the shaft handle. Since the top ring and the support arm are the same annular cylinder, the structure is reliable and firm. The bearing part and the support part are an integral structure, the structure is firm, and the support is stable and reliable.

[0012] As a preferred technical means: the bearing part includes an upper bearing part located above the support plate and a lower bearing part located below the support plate, the upper end of the side cut groove is flush with the upper end surface of the support plate, the left and right widths of the support arm are the same as the left and right widths of the support plate, and the width is greater than or equal to the outer diameter of the bearing part. The structure is reasonably optimized, providing effective and reliable support, and making the bearing part have a higher structural strength as a whole, which can better realize the rotation support of the cleaning spindle.

[0013] As a preferred technical means: the outer circumference of the support arm and the outer circumference of the flange are the same cylindrical arc surface, and the inner circumference of the support arm and the inner circumference of the fixing part are the same cylindrical arc surface. This structure makes the wall thickness of the support arm thicker, can provide sufficient structural strength, and has a good supporting effect.

[0014] As a preferred technical means: a support is provided on the outer side of the upper end of the support arm, the lower end of the baffle is integrally connected to the support, the baffle is a cylindrical bar, the upper end height of the baffle is between the middle and the upper end of the roller brush, the radius of the roller brush is greater than the distance from the center of the baffle to the center of the roller brush, and less than the distance from the outer side of the baffle to the center of the roller brush. The position of the baffle is reasonably optimized, which can effectively realize the interaction with the roller brush and achieve deceleration control.

[0015] Beneficial effects: The deceleration control is carried out through the mutual blocking effect of the roller brush and the baffle. Since the roller brush has a certain flexibility, there is always a relatively flexible interaction with the baffle when the roller brush rotates, which can achieve uniform rotation control, ensuring the appropriate cleaning pressure and speed of the cleaning spiral on the inner wall of the heat exchange tube during the cleaning process, improving the stability of cleaning, and thus improving the cleaning effect. In addition, due to the flexible contact, the problem of parts loss is solved to a great extent, and uniform online, continuous cleaning, anti-scaling and convective heat transfer enhancement are achieved, ensuring long-term stable and efficient operation, and achieving the goal of increasing production and saving energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a main schematic diagram of the utility model.

[0017] Figure 2 It is a left side schematic diagram of the utility model.

[0018] Figure 3 It is an axonometric schematic diagram of the utility model.

[0019] Figure 4 This utility model Figure 1 AA section diagram.

[0020] Figure 5 This utility model Figure 2 Schematic diagram of the BB cross-section.

[0021] In the figure: 1. guide pipe mouth frame; 2. cleaning main shaft; 101. fixing part; 102. supporting part; 103. baffle; 104. bearing part; 105. fluid inlet; 106. side cutting groove; 107. support; 10101. flange; 10102. fixing ring; 10103. cutting groove; 10201. support arm; 10202. top ring; 10203. support plate; 201. shaft handle; 202. roller brush; 203. hook head connecting hole. DETAILED DESCRIPTION

[0022] The technical solution of the utility model is further described in detail below in conjunction with the accompanying drawings of the specification.

[0023] like Figure 1-5As shown, a heat exchange tube cleaning device using a roller brush to control speed includes a guide tube mouth frame 1 and a cleaning spindle 2. The guide tube mouth frame 1 includes a fixing portion 101, a supporting portion 102, a stop bar 103 and a bearing portion 104. The fixing portion 101 is used to connect and fix with the end of the heat exchange tube. The supporting portion 102 is located on the fixing portion 101. The supporting portion 102 includes a support arm 10201, a top ring 10202 and a support plate 10203. The support arm 10201 is located on both the front and rear sides. The lower end of the support arm 10201 is an integral structure with the upper end of the fixing portion 101. The top ring 10202 is located on the support arm 10201. The upper end of the cleaning spindle 2 is provided with a shaft handle 201. A roller brush 202 coaxial with the cleaning spindle 2 is provided on the shaft handle 201. The shaft handle 201 is supported on the top ring 10202. The top ring 10202 and the support arm 10201 are the same circle. The fluid inlet 105 is formed by the side cutting grooves 106 on the left and right sides of the support arm 10201 penetrating the inner cavity of the support part 102. The support plate 10203 is integrally connected to the top of the front and rear support arms 10201. The bearing part 104 is integrally arranged on the support plate 10203. The bearing part 104 includes an upper bearing part located above the support plate 10203 and a lower bearing part located below the support plate 10203. The upper end of the side cutting groove 106 is flush with the upper end surface of the support plate 10203. The left and right widths of the support arm 10201 are the same as the left and right widths of the support plate 10203, and the width is equal to the outer diameter of the bearing part 104. Fluid inlets 105 are provided on the left and right sides of the middle and lower part of the support part 102, the lower end of the fixed part 101 is a fluid outlet, a support 107 is provided on the outer side of the upper end of the support arm 10201, the lower end of the baffle 103 is integrally connected to the support 107, a cylindrical vertical baffle 103 is provided on the support 107, the upper end height position of the baffle 103 is in the vertical middle of the roller brush 202, the radius of the roller brush 202 is greater than the distance from the center of the baffle 103 to the center of the roller brush 202, and is smaller than the distance from the outer side of the baffle 103 to the center of the roller brush 202. When the roller brush 202 rotates, its outer periphery will be slowed down due to the obstruction of the baffle 103 to achieve rotation speed control, the cleaning spindle 2 passes through the central axis hole of the bearing part 104 from top to bottom, and extends downward from the lower end of the fixed part 101, and the lower end of the cleaning spindle 2 is provided with a hook head connecting hole 203 for connecting with the cleaning spiral.

[0024] In order to make the cleaning element have better uniform speed performance, the roller brush 202 adopts a high-density filament structure, and the filaments are arranged radially. The high-density filament structure can make the cleaning element have better uniform speed performance, greatly increase the cleaning ability of the pipe wall scale, and make the cleaning element work more stably, which can effectively slow down the cleaning element and avoid the situation of forced stop of spiral motion.

[0025] In order to realize the connection and fixation between the guide pipe mouth frame 1 and the end of the heat exchange tube, the fixing part 101 is annular with a wall thickness of 2mm, and an outward flange 10101 is provided on the outer periphery of the upper end of the fixing part 101. The outer diameter of the flange 10101 is 4mm larger than the inner diameter and inner wall radius of the heat exchange tube, and the fixing part 101 is interference-fitted with the inner wall of the heat exchange tube. This structure can conveniently realize the connection and fixation between the guide pipe mouth frame 1 and the end of the heat exchange tube.

[0026] In order to facilitate installation, a fixing ring 10102 protruding outward is provided on the side of the fixing part 101, and the fixing ring 10102 is interference-matched with the inner wall of the heat exchange tube. By having the fixing ring 10102 protruding outward and the inner wall of the heat exchange tube being interference-matched, rather than the entire side wall of the fixing part 101 being interference-matched with the inner wall of the heat exchange tube, on the one hand, interference fit can be achieved, and on the other hand, the difficulty of installation is greatly reduced, making installation convenient.

[0027] In order to facilitate installation, a plurality of cutting grooves 10103 are provided in the middle and lower part of the fixing part 101. The cutting grooves 10103 provide the fixing part 101 with a certain radial compression elasticity, which makes it easier for the guide pipe opening frame 1 to be installed and fixed on the end of the heat exchange pipe.

[0028] In order to provide sufficient structural strength, the outer circumference of the support arm 10201 and the outer circumference of the flange 10101 are the same cylindrical arc surface, and the inner circumference of the support arm 10201 and the inner circumference of the fixing part 101 are the same cylindrical arc surface. This structure makes the wall thickness of the support arm 10201 thicker, can provide sufficient structural strength, and has a good supporting effect.

[0029] During installation, the cleaning main shaft 2 with the roller brush 202 is passed through the central axis hole of the bearing part 104 from top to bottom, and extends downward from the lower end of the fixed part 101 of the guide pipe mouth frame 1, and the end hook of the cleaning spiral is connected to the hook head connecting hole 203 at the lower end of the cleaning main shaft 2, and then the fixed part 101 of the guide pipe mouth frame 1 is installed to the end of the heat exchange tube. A frequency conversion cabinet is installed to enable the pump to run at a specific frequency. After the motor is started, cleaning work is carried out. The device performs deceleration control through the mutual blocking effect of the roller brush 202 and the baffle 103. Since the roller brush 202 has a certain flexibility, when the roller brush 202 rotates, there is always a relatively flexible interaction with the baffle 103, which can achieve uniform rotation control, ensuring the appropriate cleaning pressure and speed of the cleaning spiral on the inner wall of the heat exchange tube during the cleaning process, improving the stability of cleaning, and thus improving the cleaning effect. In addition, due to the flexible contact, the problem of parts loss is solved to a great extent, and uniform online, continuous cleaning and anti-scaling and convective heat transfer enhancement are achieved, ensuring long-term stable and efficient operation, and achieving the goal of increasing production and saving energy.

[0030] above Figure 1-5The heat exchange tube cleaning device shown in the figure which uses a roller brush to control the speed is a specific embodiment of the present utility model, which has embodied the substantial characteristics and progress of the present utility model. According to actual use needs and under the inspiration of the present utility model, equivalent modifications in shape, structure, etc. can be made to the device, which are all within the protection scope of this scheme.

Claims

1. A heat exchange tube cleaning device using a roller brush to control speed, characterized in that: The invention comprises a guide pipe mouth frame (1) and a cleaning spindle (2), wherein the guide pipe mouth frame (1) comprises a fixing portion (101), a supporting portion (102), a retaining bar (103) and a bearing portion (104), wherein the supporting portion (102) is located above the fixing portion (101), the bearing portion (104) is located in the middle of the upper middle portion of the supporting portion (102), fluid inlets (105) are provided on both sides of the lower middle portion of the supporting portion (102), the lower end of the fixing portion (101) is a fluid outlet, and the side of the supporting portion (102) is provided with a retaining bar (103). The upper end of the cleaning spindle (2) is provided with a shaft handle (201), the shaft handle (201) is located on the top surface of the support part (102), and a roller brush (202) coaxial with the cleaning spindle (2) is provided on the shaft handle (201). When the roller brush (202) rotates, its outer periphery will be slowed down due to the obstruction of the baffle (103) to achieve rotation speed control. The cleaning spindle (2) passes through the central axis hole of the bearing part (104) from top to bottom and extends downward from the lower end of the fixing part (101). The lower end of the cleaning spindle (2) is provided with a hook head connection hole (203) for connecting with the cleaning spiral.

2. The heat exchange tube cleaning device using a roller brush to control speed according to claim 1, characterized in that: The roller brush (202) adopts a high-density filament structure, and the filaments are radially arranged.

3. The heat exchange tube cleaning device using a roller brush to control speed according to claim 2, characterized in that: The fixing portion (101) is in the shape of a ring and has a wall thickness of 1.5-2.5 mm. An outward flange (10101) is provided on the outer periphery of the upper end of the fixing portion (101). The outer diameter of the flange (10101) is 3-10 mm larger than the inner diameter and inner wall radius of the heat exchange tube. The fixing portion (101) is interference fit with the inner wall of the heat exchange tube.

4. The heat exchange tube cleaning device using a roller brush to control speed according to claim 3 is characterized in that: A fixing ring (10102) protruding outward is provided on the side surface of the fixing portion (101), and the fixing ring (10102) is interference fit with the inner wall of the heat exchange tube.

5. The heat exchange tube cleaning device using a roller brush to control speed according to claim 4, characterized in that: The middle and lower part of the fixing portion (101) is provided with a plurality of cutting grooves (10103) which penetrate radially and are open at the lower ends.

6. The heat exchange tube cleaning device using a roller brush to control speed according to claim 5, characterized in that: The support portion (102) comprises a support arm (10201), a top ring (10202) and a support plate (10203), wherein the support arm (10201) is located at the front and rear sides, the lower end of the support arm (10201) is an integral structure with the upper end of the fixing portion (101), the top ring (10202) is located above the support arm (10201), the shaft handle (201) is supported on the top ring (10202), the top ring (10202) and the support arm (10201) are the same annular cylinder, the fluid inlet (105) is formed by side cut grooves (106) on the left and right sides of the support arm (10201) penetrating the inner cavity of the support portion (102), the support plate (10203) is integrally connected to the top ends of the front and rear support arms (10201), and the bearing portion (104) is integrally arranged on the support plate (10203).

7. The heat exchange tube cleaning device using a roller brush to control speed according to claim 6, characterized in that: The bearing portion (104) comprises an upper bearing portion located above the supporting plate (10203) and a lower bearing portion located below the supporting plate (10203); the upper end of the side cut groove (106) is flush with the upper end surface of the supporting plate (10203); the left and right widths of the support arm (10201) are the same as the left and right widths of the supporting plate (10203), and the width is greater than or equal to the outer diameter of the bearing portion (104).

8. The heat exchange tube cleaning device using a roller brush to control speed according to claim 7, characterized in that: The outer circumferential surface of the support arm (10201) and the outer circumferential surface of the flange (10101) are the same cylindrical arc surface, and the inner circumferential surface of the support arm (10201) and the inner circumferential surface of the fixing portion (101) are the same cylindrical arc surface.

9. The heat exchange tube cleaning device using a roller brush to control speed according to claim 8, characterized in that: A support (107) is provided on the outer side of the upper end of the support arm (10201); the lower end of the baffle (103) is integrally connected to the support (107); the baffle (103) is a cylindrical bar; the upper end of the baffle (103) is located at a height between the middle and the upper end of the roller brush (202); the radius of the roller brush (202) is greater than the distance from the center of the baffle (103) to the center of the roller brush (202), and is smaller than the distance from the outer side of the baffle (103) to the center of the roller brush (202).

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