A guide pipe orifice frame with inverted cone bearing

Abstract

The utility model discloses a guide pipe mouth rack with an inverted cone bearing, and relates to the field of heat exchanger cleaning devices. Due to long-term operation, the pipe mouth rack of the heat exchange tube of the evaporator in the chemical plant has a bearing working surface that is worn and has a reduced height. The resistance moment of the baffle bar next to the bearing becomes smaller, the resistance becomes larger, and the cleaning effect is slightly reduced. The utility model includes a fixed part, a support part, a baffle bar and a bearing part. The left and right sides of the support part are fluid inlets, and the lower end of the fixed part is a fluid outlet. The bearing part adopts an inverted cone bearing shape with a large outer diameter at the upper end and a small outer diameter at the lower end. A vertical shaft hole is provided in the middle of the bearing part. As the working surface wears and the height is reduced, the resistance of the baffle bar becomes larger, and the cleaning effect is reduced. Due to the inverted cone structure of the bearing, the rotational friction radius of the cleaning spiral on the bearing working surface is also reduced accordingly, achieving wear compensation, thereby maintaining the stability of the cleaning effect.

Description

Technical Field

[0001] The utility model relates to the field of heat exchanger cleaning devices, in particular to a guide pipe orifice frame with an inverted cone bearing. Background Art

[0002] During the chemical production process, the dirt formed on the wall of the heat exchanger tube 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 evaporator pipe scale, but the plastic spiral in this method cannot remove harder dirt.

[0004] Therefore, under the current situation that the descaling technology of tubular heat exchangers is limited, it is necessary to design an automatic online cleaning device for tubular heat exchangers.

[0005] The mounting bearings currently used in the cleaning elements of chemical plant evaporators 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 on the entire cleaning spiral to achieve the cleaning effect. The flow energy of the fluid itself and the secondary steam energy in the evaporator pipe 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 heat exchange tube, thereby completing the cleaning of the pipeline. However, this cleaning spiral is limited in rotation to avoid excessive speed, that is, the spiral movement for better cleaning of scale.

[0006] Due to long-term work, the working surface of the bearing becomes worn and the height begins to decrease. After the height decreases, the resistance torque of the three baffles next to the bearing will become smaller, the resistance will increase, and the cleaning effect will be slightly reduced. Utility Model Content

[0007] 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 guide pipe mouth frame with an inverted cone bearing to maintain a stable cleaning effect. To this end, the utility model adopts the following technical solutions.

[0008] A guide pipe mouth frame with an inverted cone bearing comprises a fixed part, a support part arranged on the fixed part, baffles arranged on the left and right sides of the support part, and a bearing part arranged on the top surface of the support part, wherein the left and right sides of the support part are fluid inlets, the lower end of the fixed part is a fluid outlet, the bearing part adopts an inverted cone bearing shape with a large outer diameter at the upper end and a small outer diameter at the lower end, and a vertical shaft hole is arranged in the middle of the bearing part. 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 inverted cone bearing, and drives the spiral in the heat exchange tube to perform multi-dimensional rotation cleaning movement, thereby efficiently completing the removal of dirt in the pipeline, with the wear and height reduction of the working surface, the resistance torque of the baffle next to it will decrease, so that the resistance becomes larger, and the cleaning effect will be slightly reduced, but due to the inverted cone structure of the bearing, the rotation friction radius of the cleaning spiral on the bearing working surface will also be reduced accordingly, this design cleverly realizes wear compensation, so that when the baffle resistance torque is reduced, the friction radius of the cleaning spiral is also reduced, thereby maintaining the stability of the cleaning effect.

[0009] As a preferred technical means: the support part includes a support surface at the top and support arms located at the front and rear sides of the support surface. The support arms are integrally structured with the upper end of the fixing part. A bearing reinforcement part is provided below the support surface. The bearing reinforcement part is coaxial with the bearing part, and the shaft hole passes through the bearing reinforcement part from top to bottom. This structure realizes stable connection and support of the bearing. The bearing reinforcement part is provided to enhance the supporting capacity of the bearing part. It is coaxial with the bearing part. The shaft hole passing through the bearing reinforcement part from top to bottom ensures that the bearing part can remain stable when rotating or under force, reducing performance degradation caused by vibration or deformation.

[0010] As a preferred technical means: the part of the shaft hole located above the top surface of the support part is an inverted conical hole with a larger top and a smaller bottom. This structure makes the upper space in the shaft hole larger, and after the cleaning spiral passes through the shaft hole, the relative resistance becomes smaller when rotating, and it is not easy to stop the cleaning spiral from working.

[0011] 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 side surface of the fixing part is interference fit with the inner wall of the heat exchange tube. This structure can easily realize the connection and fixation with the end of the heat exchange tube.

[0012] 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 is convenient for installation and fixing on the end of the heat exchange tube.

[0013] As a preferred technical means: the baffle is integrally connected and erected at the upper end of the fixed part, the number of baffles is 2-4 on each side, the baffles are arranged in a straight line in the left and right directions, and are located in the middle position of the guide pipe opening frame in the front and back directions, and the upper end of the baffle is higher than the upper end of the bearing part. Due to the resistance torque, the blocking effect of multiple baffles gradually decreases from the inside to the outside, avoiding the situation of forcing the spiral movement to stop, so as to achieve online, continuous cleaning and anti-scaling and convective heat transfer enhancement.

[0014] As a preferred technical means: the radial width of the inner baffle is wider than the radial width of the outer baffle. Since the inner baffle requires greater force and the wear caused will be relatively serious, the inner side needs to be wider and thicker.

[0015] As a preferred technical means: horizontal inward support plates are provided on the left and right sides of the upper end of the fixing part, the lower end of the baffle is an integrated structure with the support plate, and the front-to-back width of the support plate is 1.8-2.2 times the front-to-back width of the baffle. By integrally arranging the baffle on the support plate, the baffle is stably and reliably erected, and the front-to-back width of the support plate is narrow, which does not affect the downward passage of the fluid.

[0016] As a preferred technical means: the outer side of the support arm and the outer side of the flange are the same cylindrical arc surface, and the inner side of the support arm and the inner side 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.

[0017] Beneficial effects: 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 inverted cone bearing, driving the spiral in the heat exchange tube to perform multi-dimensional rotational cleaning movement, thereby efficiently completing the removal of dirt in the pipeline. Due to the inverted cone structure of the bearing, as the working surface wears and the height decreases, the rotational friction radius of the cleaning spiral on the bearing working surface will also decrease accordingly, cleverly realizing wear compensation, so that while the resistance torque of the baffle is reduced, the friction radius of the cleaning spiral is also reduced, thereby maintaining the stability of the cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a main structural schematic diagram of the utility model.

[0019] Figure 2 It is an axonometric schematic diagram of the utility model.

[0020] Figure 3 This utility model Figure 1 Middle AA section view diagram.

[0021] Figure 4 This utility model Figure 2 Enlarged schematic diagram of part B in the middle.

[0022] In the figure: 1, fixing part; 2, supporting part; 3, baffle; 4, bearing part; 101, flange; 102, cutting groove; 103, supporting plate; 201, supporting arm; 202, supporting surface; 401, bearing reinforcement part; 402, shaft hole. DETAILED DESCRIPTION

[0023] The technical solution of the utility model is further described in detail below in conjunction with the accompanying drawings of the specification.

[0024] like Figure 1-4 As shown, a guide pipe mouth frame with an inverted cone bearing comprises a fixing portion 1, a supporting portion 2 arranged on the fixing portion 1, a retaining bar 3 arranged on the left and right sides of the supporting portion 2 and a bearing portion 4 arranged on the top surface of the supporting portion 2, the left and right sides of the supporting portion 2 are fluid inlets, the lower end of the fixing portion 1 is a fluid outlet, the bearing portion 4 adopts an inverted cone bearing shape with a larger outer diameter at the upper end and a smaller outer diameter at the lower end, a vertical axial hole 402 is arranged in the middle of the bearing portion 4, the supporting portion 2 comprises a supporting surface 202 at the top and supporting arms 201 located at the front and rear sides of the supporting surface 202, the supporting arm 201 is an integral structure with the upper end of the fixing portion 1, a bearing reinforcement portion 401 is arranged below the supporting surface 202, the bearing reinforcement portion 401 is coaxial with the bearing portion 4, the axial hole 402 passes through the bearing reinforcement portion 401 from top to bottom, and the portion of the axial hole 402 located above the top surface of the supporting portion 2 is an inverted cone hole with a larger upper portion and a smaller lower portion. The baffle bar 3 is integrally connected and erected at the upper end of the fixing part 1 . There are three baffle bars 3 on each side. The baffle bars 3 are arranged in a straight line in the left and right directions and are located in the middle position of the guide pipe opening frame in the front and back directions. The upper end height of the baffle bar 3 is 2 mm higher than the upper end of the bearing part 4 .

[0025] In order to achieve connection and fixation with the end of the heat exchange tube, the fixing part 1 is annular with a wall thickness of 1.5 mm. The outer periphery of the upper end of the fixing part 1 is provided with an outward flange 101. The outer diameter of the flange 101 is 6 mm larger than the inner diameter and inner wall radius of the heat exchange tube. The side of the fixing part 1 is interference fit with the inner wall of the heat exchange tube. This structure can easily achieve connection and fixation with the end of the heat exchange tube.

[0026] In order to facilitate installation and fixing, a cutting groove 102 is provided at the lower part of the fixing part 1, which is radially penetrated and has an open lower end. By providing the cutting groove 102, the fixing part 1 has a certain radial compression elasticity, which is convenient for installation and fixing at the end of the heat exchange tube. In this example, there are two cutting grooves 102, which are arranged symmetrically at 180 degrees.

[0027] In order to achieve a more reliable blocking effect, the radial width of the inner baffle 3 is wider than the radial width of the outer baffle 3. Since the inner blocking requires greater force and the wear caused will also be relatively serious, the inner side needs to be wider and thicker.

[0028] In order to provide structural support for the baffle 3, horizontal inward supporting plates 103 are provided on the left and right sides of the upper end of the fixing part 1, and the lower end of the baffle 3 is an integral structure with the supporting plate 103, and the front-to-back width of the supporting plate 103 is twice the front-to-back width of the baffle 3. By integrally arranging the baffle 3 on the supporting plate 103, the baffle can be stably and reliably erected, and the front-to-back width of the supporting plate 103 is relatively narrow, which does not affect the downward passage of the fluid.

[0029] In order to provide sufficient structural strength, the outer side of the support arm 201 and the outer side of the flange 101 are the same cylindrical arc surface, and the inner side of the support arm 201 and the inner side of the fixing part 1 are the same cylindrical arc surface. This structure makes the wall thickness of the support arm 201 thicker, can provide sufficient structural strength, and has a good supporting effect.

[0030] During installation, the hook shaft of the cleaning spiral extends upward from the lower end of the fixing part 1 in turn, and after passing through the shaft hole 402 upward, the horizontal part of the hook shaft of the cleaning spiral is hooked on the upper end surface of the bearing part 4, and the fixing part 1 is pressed downward into the end of the heat exchange tube. The side surface of the fixing part 1 is interfered with the inner wall of the heat exchange tube and the cutting groove 102 structure is used to fix the guide tube mouth frame.

[0031] During cleaning, 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 inverted cone bearing, driving the cleaning spiral in the heat exchange tube to perform multi-dimensional rotational cleaning movement, thereby efficiently completing the removal of dirt in the heat exchange tube. The hook shaft of the cleaning spiral is decelerated by the baffle 3. As the working surface wears and the height decreases, the resistance torque of the baffle 3 next to it will decrease, making the resistance larger, and the cleaning effect will be slightly reduced. However, due to the inverted cone structure of the bearing, the rotational friction radius of the cleaning spiral on the bearing working surface will also be reduced accordingly. This design cleverly realizes wear compensation, so that when the resistance torque of the baffle 3 is reduced, the friction radius of the cleaning spiral is also reduced, thereby maintaining the stability of the cleaning effect.

[0032] above Figure 1-4 The guide pipe mouth frame with an inverted cone bearing shown is a specific embodiment of the utility model, which has embodied the substantial characteristics and progress of the utility model. According to actual use needs and under the inspiration of the utility model, equivalent modifications in shape, structure, etc. can be made to it, which are all within the protection scope of this scheme.

Claims

1. A guide pipe orifice frame with an inverted cone bearing, characterized in that: The invention comprises a fixing portion (1), a supporting portion (2) arranged on the fixing portion (1), baffles (3) arranged on the left and right sides of the supporting portion (2), and a bearing portion (4) arranged on the top surface of the supporting portion (2), wherein the left and right sides of the supporting portion (2) are fluid inlets, the lower end of the fixing portion (1) is a fluid outlet, the bearing portion (4) is in the shape of an inverted cone bearing with a larger outer diameter at the upper end and a smaller outer diameter at the lower end, and a vertical shaft hole (402) is arranged in the middle of the bearing portion (4).

2. The guide pipe orifice frame with an inverted cone bearing according to claim 1, characterized in that: The support portion (2) comprises a support surface (202) at the top and support arms (201) located at the front and rear sides of the support surface (202); the support arm (201) and the upper end of the fixing portion (1) are integrally formed; a bearing reinforcement portion (401) is provided below the support surface (202); the bearing reinforcement portion (401) is coaxial with the bearing portion (4); and the shaft hole (402) passes through the bearing reinforcement portion (401) from top to bottom.

3. The guide pipe orifice frame with an inverted cone bearing according to claim 2, characterized in that: The portion of the shaft hole (402) located above the support surface (202) is an inverted conical hole that is larger at the top and smaller at the bottom.

4. The guide pipe orifice frame with an inverted cone bearing according to claim 3, characterized in that: The fixing part (1) is in the shape of a ring and has a wall thickness of 1.5-2.5 mm. An outward flange (101) is provided on the outer periphery of the upper end of the fixing part (1). The outer diameter of the flange (101) is 3-10 mm larger than the inner diameter and inner wall radius of the heat exchange tube. The side surface of the fixing part (1) is interference fit with the inner wall of the heat exchange tube.

5. The guide pipe orifice frame with an inverted cone bearing according to claim 4, characterized in that: The middle and lower part of the fixing portion (1) is provided with a plurality of cutting grooves (102) which penetrate radially and are open at the lower ends.

6. The guide pipe orifice frame with an inverted cone bearing according to claim 5, characterized in that: The baffle bars (3) are integrally connected and stand upright on the upper end of the fixed portion (1). The number of baffle bars (3) is 2-4 on both sides. The baffle bars (3) are arranged in a straight line in the left and right directions and are located in the middle position of the guide pipe opening frame in the front and back directions. The upper end of the baffle bars (3) is higher than the upper end of the bearing portion (4).

7. The guide pipe orifice frame with an inverted cone bearing according to claim 6, characterized in that: The radial width of the inner baffle (3) is wider than the radial width of the outer baffle (3).

8. The guide pipe orifice frame with an inverted cone bearing according to claim 7, characterized in that: Horizontally inwardly facing support plates (103) are provided on both left and right sides of the upper end of the fixing portion (1); the lower end of the baffle (3) and the support plate (103) are an integral structure; the front-to-back width of the support plate (103) is 1.8-2.2 times the front-to-back width of the baffle (3).

9. The guide pipe orifice frame with an inverted cone bearing according to claim 8, characterized in that: The outer side surface of the support arm (201) and the outer side surface of the flange (101) are the same cylindrical arc surface, and the inner side surface of the support arm (201) and the inner side surface of the fixing portion (1) are the same cylindrical arc surface.

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