Anti-freezing device for cooling unit of indirect cooling tower

Abstract

The utility model discloses an anti-freezing device for a cooling unit of an indirect cooling tower, which comprises an electric heating insulation sleeve with a sealed bottom end and an open top end, stacked and sleeved at the bottom of the periphery of a cooling triangle and used for covering the whole cooling triangle and heating air in an inner cavity of the electric heating insulation sleeve; the lifting assembly is arranged on the top of the cooling triangle, the lifting end of the lifting assembly is fixedly connected with the top end of the electric heating heat preservation sleeve, and the lifting assembly is used for driving the electric heating heat preservation sleeve to ascend and extend or descend to be stacked. According to the utility model, the electric heating insulation sleeves are stacked and sleeved at the bottom of the periphery of the cooling triangle, and the lifting assembly capable of driving the electric heating insulation sleeves to lift is arranged at the top of the cooling triangle, so that when the environment temperature is extremely low, the lifting assembly is started to drive the electric heating insulation sleeves to lift, and the electric heating insulation sleeves stretch and extend to cover the whole cooling triangle; the surrounding air is heated, and the circulating water is prevented from being frozen.

Description

Technical Field

[0001] This utility model relates to the field of antifreeze technology for indirect cooling towers, and specifically to an antifreeze device for indirect cooling tower cooling units. Background Technology

[0002] Indirect cooling towers, also known as indirect cooling towers, are commonly used for cooling the exhaust gas of steam turbine generator sets in power plants. Their cooling units mainly consist of a heat exchanger located at the air inlet of the cooling tower and a circulating water pump pipeline connected to the heat exchanger. At the air inlet of the indirect cooling tower, there is a heat exchange element composed of multiple cooling pipes and heat dissipation fins on the cooling pipes. When air passes through the heat dissipation fins, it carries away the heat from the hot water in the cooling pipes. The heat exchange elements are arranged in a triangular pattern to increase the heat exchange area; such a triangular arrangement is usually called a cooling triangle. The heat exchanger of the cooling unit includes multiple annularly arranged and independent cooling triangles.

[0003] To ensure the cooling effect of the cooling triangle on the circulating water under different seasons and ambient temperatures, and thus regulate the circulating water temperature, louvers are installed on the windward side of the cooling triangle. Adjusting the opening of the louvers regulates the airflow, thereby controlling the circulating water temperature. In winter, when ambient temperatures are low, to prevent the circulating water in the cooling triangle from freezing and affecting the normal operation of the cooling unit, the opening of the louvers is usually greatly reduced, or even completely closed, to prevent freezing.

[0004] However, in some regions where the ambient temperature is extremely low in winter, even if the louvers are completely closed, the ambient temperature is enough to freeze the circulating water in the cooling triangle, causing blockage of the cooling pipes in the cooling triangle, preventing the circulating water from flowing normally, and even cracking the cooling pipes, which has an adverse effect on the normal operation of the cooling unit.

[0005] Therefore, this application proposes an antifreeze device for indirect cooling tower units to solve the above-mentioned technical problems. Utility Model Content

[0006] The main purpose of this utility model is to solve the above-mentioned shortcomings and provide an antifreeze device for indirect cooling tower cooling units to prevent the circulating water in the cooling triangle from freezing due to extreme ambient temperatures.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0008] An antifreeze device for an indirect cooling tower unit includes: an electrically heated insulation sleeve, sealed at the bottom and open at the top, stacked and fitted around the bottom of a cooling triangle to cover the entire cooling triangle and heat the air inside the electrically heated insulation sleeve; and a lifting assembly, located at the top of the cooling triangle with its lifting end fixedly connected to the top of the electrically heated insulation sleeve, for driving the electrically heated insulation sleeve to rise and extend or to fall and stack.

[0009] Furthermore, the electric heating insulation sleeve includes an outer insulation sleeve and an electric heating film covering the entire inner wall of the outer insulation sleeve, both of which are made of flexible material. The inlet and outlet water pipes at the bottom of the cooling triangle pass through the bottom seal of the electric heating insulation sleeve and are connected to the circulating water pumping pipeline.

[0010] Furthermore, the lifting assembly includes a mounting plate disposed on the top of the cooling triangle, a plurality of motors fixedly disposed on the top of the mounting plate, a reducer fixedly disposed on the top of the mounting plate and whose input end is drivenly connected to the output end of the motor, a winch rotatably disposed on the top of the mounting plate and whose rotating shaft is drivenly connected to the output end of the reducer, and a pulling rope with one end fixedly wound on the winch and the other end fixedly disposed on the top of the electric heating insulation sleeve.

[0011] Furthermore, a reversing wheel is rotatably provided at the edge of the mounting plate corresponding to the winch, and the pulling rope is mounted on the reversing wheel.

[0012] Furthermore, the cooling triangle is surrounded by a scratch-resistant guide bracket, which includes multiple vertical rods arranged around the cooling triangle and multiple horizontal rods evenly arranged and fixed between adjacent vertical rods. The electric heating insulation sleeve is fitted around the scratch-resistant guide bracket. The vertical rods of the scratch-resistant guide bracket pass through the bottom end seal of the outer insulation sleeve and are fixedly installed on the ground. The mounting plate is fixedly installed at the top of the multiple vertical rods.

[0013] Furthermore, the orbital trajectory of the multiple vertical rods is similar to the cross-sectional shape of the cooling triangle.

[0014] Furthermore, a counterweight is fixedly installed at the top of the electric heating insulation sleeve.

[0015] The beneficial effects of this utility model are reflected in:

[0016] This invention features an electrically heated insulation sleeve stacked around the bottom of a cooling triangle, and a lifting assembly at the top of the cooling triangle that can raise and lower the insulation sleeve. When the ambient temperature is extremely low, the lifting assembly is activated to raise the insulation sleeve, which then extends and covers the entire cooling triangle, heating the surrounding air and preventing the circulating water inside from freezing. By providing a scratch-resistant guide bracket around the cooling triangle, the invention prevents the insulation sleeve from rubbing against sharp, protruding structures such as heat dissipation fins on the cooling triangle during raising and lowering, thus avoiding damage to the insulation sleeve or its inability to raise and lower normally. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0018] Figure 1 This is a schematic diagram of the installation position according to an embodiment of the present invention;

[0019] Figure 2 This is an enlarged schematic diagram of the installation position according to an embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0021] Figure 4 This is a schematic diagram of an embodiment of the present invention and a cooling triangle split;

[0022] Figure 5 This is a schematic diagram of the structure of an electric heating insulation sleeve according to an embodiment of the present invention;

[0023] Figure 6 This is a schematic diagram of the lifting component structure according to an embodiment of the present invention;

[0024] Figure 7 This is a top view of an embodiment of the present invention after removing the lifting component;

[0025] Figure 8 This is a schematic diagram of the cooling triangle covered by the electric heating insulation sleeve according to an embodiment of the present invention.

[0026] In the diagram: 1. Cooling triangle; 2. Electric heating insulation sleeve; 21. Outer insulation sleeve; 22. Electric heating film; 3. Lifting assembly; 31. Mounting plate; 32. Motor; 33. Reducer; 34. Winch; 35. Pull rope; 4. Inlet and outlet water pipes; 5. Reversing wheel; 6. Anti-scratch guide bracket; 61. Vertical bar; 62. Horizontal bar; 7. Counterweight. Detailed Implementation

[0027] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0028] like Figure 1-8As shown, this utility model provides an antifreeze device for indirect cooling towers, which can be applied to the antifreeze of the cooling triangle in an indirect cooling tower cooling unit. It includes: an electric heating insulation sleeve 2, which is sealed at the bottom and open at the top, and is stacked and sleeved on the bottom of the outer periphery of the cooling triangle 1 to cover the entire cooling triangle 1 and heat the air inside the electric heating insulation sleeve 2; and a lifting component 3, which is set at the top of the cooling triangle 1 and whose lifting end is fixedly connected to the top of the electric heating insulation sleeve 2, and is used to drive the electric heating insulation sleeve 2 to rise and extend or to fall and stack.

[0029] When the ambient temperature is extremely low, the lifting assembly 3 is activated, causing the electrically heated insulation sleeve 2 to rise. The stacked portion of the electrically heated insulation sleeve 2 gradually rises and extends until it covers the entire cooling triangle 1, separating the cooling triangle 1 from the external environment. Then, the heating function of the electrically heated insulation sleeve 2 is activated to heat the air inside its cavity. The heated air transfers heat to the cooling triangle 1, preventing the circulating water inside from freezing. When the ambient temperature is insufficient to freeze the circulating water in the cooling triangle 1, the lifting assembly 3 can be activated to lower the electrically heated insulation sleeve 2, exposing the cooling triangle 1. The heating function of the electrically heated insulation sleeve 2 is then turned off, and the cooling triangle 1 resumes normal operation.

[0030] In one embodiment, the electric heating insulation sleeve 2 includes an outer insulation sleeve 21 and an electric heating film 22 covering the entire inner wall of the outer insulation sleeve 21. Both are made of flexible material. The inlet and outlet water pipes 4 at the bottom of the cooling triangle 1 pass through the bottom end seal of the electric heating insulation sleeve 2 and are connected to the circulating water pumping pipeline.

[0031] With this design, the electric heating film 22 heats the air inside the outer insulation sleeve 21, thereby transferring heat to the cooling triangle 1 to prevent the internal circulating water from freezing. At the same time, the outer insulation sleeve 21 separates the heated air from the outside air and keeps the heated air warm, reducing the heat exchange efficiency between the inner cavity of the outer insulation sleeve 21 and the external environment, thereby reducing the electrical energy required for the electric heating film 22 to heat.

[0032] To ensure that the electric heating insulation sleeve 2 can be stacked and expanded as a whole, both the outer insulation sleeve 21 and the electric heating film 22 are made of flexible materials. The outer insulation sleeve 21 can be made of cotton bag, which has a good insulation effect and can be stacked freely. The electric heating film 22 can be made of polyimide heating film. This type of heating film has a high market penetration, low price, and good flexibility, and can be customized into any shape.

[0033] It should be noted that the fixed structure between the cooling triangle 1 and the ground, as well as the circulating water pumping pipeline, are not shown in the attached drawings, because they are all mature existing technologies and do not affect the technical solution of this utility model.

[0034] In one embodiment, the lifting assembly 3 includes a mounting plate 31 disposed on the top of the cooling triangle 1, a plurality of motors 32 fixedly disposed on the top of the mounting plate 31, a reducer 33 fixedly disposed on the top of the mounting plate 31 and whose input end is connected to the output end of the motor 32, a winch 34 rotatably disposed on the top of the mounting plate 31 and whose rotating shaft is connected to the output end of the reducer 33, and a pulling rope 35 with one end fixedly wound on the winch 34 and the other end fixedly disposed on the top of the electric heating insulation sleeve 2.

[0035] With this design, when the motor 32 is started, the torque of the motor 32 is amplified by the reducer 33 and drives the winch 34 to rotate. The winch 34 winds up or releases the pull rope 35, thereby driving the electric heating insulation sleeve 2 at the other end of the pull rope 35 to rise and fall.

[0036] In one embodiment, a reversing wheel 5 is rotatably provided at the edge of the mounting plate 31 corresponding to the winch 34, and the pull rope 35 is mounted on the reversing wheel 5.

[0037] With this design, the pull rope 35 drives the reversing wheel 5 to rotate when it moves, and the friction between the two is small. If the reversing wheel 5 is not set, the pull rope 35 is prone to severe friction with the edge of the mounting plate 31 when it moves, resulting in greater frictional resistance and easy wear and breakage of the pull rope 35.

[0038] In one embodiment, a scratch-resistant guide bracket 6 is fitted around the cooling triangle 1, including multiple vertical rods 61 arranged around the cooling triangle 1 and multiple horizontal rods 62 evenly arranged and fixed between adjacent vertical rods 61. An electric heating insulation sleeve 2 is fitted around the scratch-resistant guide bracket 6. The vertical rods 61 of the scratch-resistant guide bracket 6 pass through the bottom end seal of the outer insulation sleeve 21 and are fixedly installed on the ground. A mounting plate 31 is fixedly installed at the top of the multiple vertical rods 61.

[0039] With this design, the horizontal bar 62 connects multiple vertical bars 61 to form a whole. During the rising and falling of the electric heating insulation sleeve 2, due to the blocking effect of the anti-scratch guide bracket 6, the electric heating insulation sleeve 2 will not come into contact with the cooling triangle 1 bracket, thus avoiding sharp protruding structures such as heat dissipation fins on the cooling triangle 1 from rubbing against the electric heating insulation sleeve 2, which would cause damage to the electric heating insulation sleeve 2 or prevent it from rising and falling normally.

[0040] In one embodiment, the orbital path of the multiple vertical rods 61 is similar to the cross-sectional shape of the cooling triangle 1.

[0041] The electric heating insulation sleeve 2 is fitted onto the outside of the anti-scratch guide bracket 6. In order to reduce the internal space of the electric heating insulation sleeve 2, thereby reducing the amount of air required for heating by the electric heating film 22 and saving energy, the electric heating insulation sleeve 2 needs to fit snugly against the anti-scratch guide bracket 6. Therefore, the cross-sectional area of ​​the electric heating insulation sleeve 2 is equal to the cross-sectional area of ​​the anti-scratch guide bracket 6. This design can reduce the anti-scratch guide bracket 6, thereby reducing the cross-sectional area and internal space of the electric heating insulation sleeve 2 and saving the energy required for heating.

[0042] In one embodiment, a counterweight 7 is fixedly provided at the top of the electric heating insulation sleeve 2.

[0043] When the electric heating insulation sleeve 2 is lowered, due to the toughness of its own material and the existence of friction between it and the anti-scratch guide bracket 6, the electric heating insulation sleeve 2 may not be able to descend and stack in an orderly manner by its own weight alone. In this design, the weight of the counterweight block 7 provides an additional downward force for the electric heating insulation sleeve 2, ensuring that it can descend and stack normally.

[0044] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention.

[0045] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0046] Furthermore, the meaning of "and / or" throughout the text includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution that simultaneously satisfies A and B. Additionally, "multiple" refers to two or more. Moreover, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of a person skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

Claims

1. An antifreeze device for an indirect cooling tower unit, characterized in that, include: An electric heating insulation sleeve (2) is sealed at the bottom and open at the top. It is stacked and fitted at the bottom of the outer periphery of the cooling triangle (1) to cover the entire cooling triangle (1) and heat the air inside the electric heating insulation sleeve (2). The lifting assembly (3) is located at the top of the cooling triangle (1) and its lifting end is fixedly connected to the top of the electric heating insulation sleeve (2), which is used to drive the electric heating insulation sleeve (2) to rise and extend or to fall and stack.

2. The antifreeze device for an indirect cooling tower unit as described in claim 1, characterized in that, The electric heating insulation sleeve (2) includes an outer insulation sleeve (21) and an electric heating film (22) covering the entire inner wall of the outer insulation sleeve (21). Both are made of flexible material. The inlet and outlet water pipes (4) at the bottom of the cooling triangle (1) pass through the bottom end seal of the electric heating insulation sleeve (2) and are connected to the circulating water pumping pipeline.

3. The antifreeze device for an indirect cooling tower unit as described in claim 2, characterized in that, The lifting assembly (3) includes a mounting plate (31) set on the top of the cooling triangle (1), a plurality of motors (32) fixedly set on the top of the mounting plate (31), a reducer (33) fixedly set on the top of the mounting plate (31) and whose input end is connected to the output end of the motor (32), a winch (34) rotatably set on the top of the mounting plate (31) and whose rotating shaft is connected to the output end of the reducer (33), and a pulling rope (35) with one end fixedly wound on the winch (34) and the other end fixedly set on the top of the electric heating insulation sleeve (2).

4. The antifreeze device for an indirect cooling tower unit as described in claim 3, characterized in that, A reversing wheel (5) is rotatably provided at the edge of the mounting plate (31) corresponding to the winch (34), and the pulling rope (35) is mounted on the reversing wheel (5).

5. The antifreeze device for an indirect cooling tower unit as described in claim 4, characterized in that, The cooling triangle (1) is surrounded by a scratch-resistant guide bracket (6), which includes multiple vertical rods (61) arranged around the cooling triangle (1) and multiple horizontal rods (62) evenly arranged and fixed between adjacent vertical rods (61). The electric heating insulation sleeve (2) is fitted around the scratch-resistant guide bracket (6). The vertical rods (61) of the scratch-resistant guide bracket (6) pass through the bottom end of the outer insulation sleeve (21) and are fixedly set on the ground. The mounting plate (31) is fixedly set at the top of the multiple vertical rods (61).

6. The antifreeze device for an indirect cooling tower unit as described in claim 5, characterized in that, The orbital path of the multiple vertical rods (61) is similar to the cross-sectional shape of the cooling triangle (1).

7. The antifreeze device for an indirect cooling tower unit as described in claim 6, characterized in that, A counterweight (7) is fixedly installed at the top of the electric heating insulation sleeve (2).

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