Cooling tower

Abstract

The utility model relates to the technical field of circulating water cooling towers, and discloses a cooling tower which comprises a tower body and an opening and closing device, a water distribution tank, a water distribution tank, an inner water distribution channel and an outer water distribution channel are formed in the tower body, the water distribution tank is communicated with the water distribution tank through the inner water distribution channel and the outer water distribution channel respectively, and the water distribution tank is located in the center of the water distribution tank; the opening and closing device comprises a gate, and the gate is movably connected with the tower body and used for controlling opening and closing of the outer water distribution channel. According to the technical scheme, the gate is closed in the low-temperature weather, so that the water distribution amount of the inner periphery of the water distribution tank is increased, the water temperature of the inner periphery area is increased, and therefore the probability that the inner periphery of the water distribution tank is frozen is reduced; meanwhile, water flow in the outer water distribution channel is cut off, peripheral water distribution of the water distribution tank is stopped, the probability that the periphery of the water distribution tank is frozen is reduced, and therefore the problem that the periphery of the water distribution tank of the cooling tower is prone to freezing in low-temperature weather is solved to a certain extent.

Description

Technical Field

[0001] The utility model relates to the technical field of circulating water cooling towers, in particular to a cooling tower. Background Art

[0002] The natural draft cooling tower is a very important thermal equipment in the power station. Its function is to release the heat absorbed by the circulating cooling water in the condenser into the surrounding atmosphere through water-gas heat and mass exchange. At present, the general cooling tower theory operation mode during unit operation is mainly the following two modes: full tower spray type and inner and outer ring partition water distribution type.

[0003] When the whole tower spraying method is used, ice will appear on the outer surface of the cooling tower in extremely cold weather. As time goes by, the water vapor freezes more and more on the outer tower body, forming icicles. The icicles will affect the airflow into the tower body and disrupt the heat exchange. Utility Model Content

[0004] The main purpose of the utility model is to provide a cooling tower, aiming to solve the problem that the periphery of the water distribution pool of the cooling tower is easy to freeze in low temperature weather.

[0005] In order to achieve the above-mentioned purpose, the cooling tower proposed by the utility model comprises:

[0006] A tower body, wherein the tower body is formed with a water distribution trough, a water distribution pool, an inner water distribution channel and an outer water distribution channel, the water distribution trough is connected to the water distribution pool through the inner water distribution channel and the outer water distribution channel respectively, and the water distribution trough is located at the center of the water distribution pool; the bottom wall of the water distribution pool is formed with an inner water outlet and an outer water outlet, the inner water outlet is connected to the inner water distribution channel, and the outer water outlet is connected to the outer water distribution channel; the distance between the inner water outlet and the water distribution trough is smaller than the distance between the outer water outlet and the water distribution trough; and

[0007] An opening and closing device, wherein the opening and closing device comprises a gate, wherein the gate is movably connected to the tower body and is used to control the opening and closing of the external water distribution channel.

[0008] Optionally, a lower water inlet is formed on the wall of the water distribution tank, and the lower water inlet is connected to the external water distribution channel.

[0009] Optionally, an upper water inlet is formed on the wall of the water distribution trough, the upper water inlet is connected to the internal water distribution channel, and the upper water inlet and the lower water inlet are located in the same plane; the gate has a first state, a second state and a third state; in the first state, the gate does not cover the lower water inlet and the upper water inlet; in the second state, the gate covers the upper water inlet; in the third state, the gate covers the lower water inlet.

[0010] Optionally, the upper water inlet and the lower water inlet are spaced apart in upper and lower directions.

[0011] Optionally, the gate is formed with a guide rail, the tower body is formed with a slide groove, and the guide rail and the slide groove are slidably connected.

[0012] Optionally, the gate further comprises a sealing strip, which is arranged on the guide rail and abuts against a groove wall of the slide groove so that the guide rail is sealed and connected to the slide groove.

[0013] Optionally, the gate further includes at least two pulleys, each of which is arranged at an interval on a side of the guide rail facing the bottom wall of the slide groove; and the sealing strip is arranged on both sides of the guide rail.

[0014] Optionally, the opening and closing device further includes a screw rod, and the gate is connected to the tower body via the screw rod.

[0015] Optionally, the opening and closing device further includes a gate hoist and a shaft guide frame, the gate hoist is arranged on the tower body and connected to the gate through the screw rod; the shaft guide frame is arranged on the tower body, and the screw rod is passed through the shaft guide frame.

[0016] Optionally, the cooling tower further comprises a temperature measuring device, which is disposed in the water distribution tank and electrically connected to the hoist.

[0017] In the technical scheme of the utility model, the cooling tower includes a tower body and an opening and closing device. The tower body is formed with a water distribution trough, a water distribution pool, an internal water distribution channel and an external water distribution channel. The water distribution trough is connected to the water distribution pool through the internal water distribution channel and the external water distribution channel respectively, and the water distribution trough is located at the center of the water distribution pool; the bottom wall of the water distribution pool is formed with an internal water outlet and an external water outlet, the internal water outlet is connected to the internal water distribution channel, and the external water outlet is connected to the external water distribution channel; the distance between the internal water outlet and the water distribution trough is smaller than the distance between the external water outlet and the water distribution trough; the opening and closing device includes a gate, which is movably connected to the tower body and is used to control the opening and closing of the external water distribution channel. When in normal climate, the external water distribution channel remains in a flowing state, so that the cooling tower can exchange heat normally; when in low temperature weather, the gate is closed so that the water flow in the external water distribution channel is cut off and no longer flows. At this time, the water in the water distribution trough enters the water distribution pool through the internal water distribution channel. In the technical solution of the utility model, closing the gate in low temperature weather increases the water distribution volume in the inner area of ​​the water distribution tank, improves the water temperature in the inner area, and thus reduces the probability of freezing in the inner area of ​​the water distribution tank; at the same time, the water flow in the external water distribution channel is cut off, stopping the water distribution in the outer area of ​​the water distribution tank, reducing the probability of freezing in the outer area of ​​the water distribution tank, and thus solves the problem of easy freezing of the outer area of ​​the cooling tower water distribution tank in low temperature weather to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0019] Figure 1 A schematic structural diagram of an embodiment of a cooling tower provided by the utility model;

[0020] Figure 2 This is a partial enlarged view of the water distribution tank in the cooling tower;

[0021] Figure 3 This is a schematic diagram of the structure of the opening and closing device in the cooling tower.

[0022] Description of Figure Numbers:

[0023] Label name Label name 1000 Cooling Tower 13 Internal water distribution channel 1 Tower body 14 External water distribution channel 11 Water distribution tank 21 Gate 111 Lower water inlet 22 Screw 112 Upper water inlet 23 Hoist 12 Water distribution tank 24 Shaft guide

[0024] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0025] 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 of 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.

[0026] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0027] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0028] Please refer to Figure 1 , Figure 2 as well as Figure 3 In order to solve the problem that the outer periphery of the cooling tower water distribution pool is easy to freeze in low temperature weather, the utility model proposes a cooling tower 1000, including:

[0029] A tower body 1 and an opening and closing device, wherein the tower body 1 is formed with a water distribution trough 11, a water distribution pool 12, an inner water distribution channel 13 and an outer water distribution channel 14, the water distribution trough 11 is connected to the water distribution pool 12 through the inner water distribution channel 13 and the outer water distribution channel 14 respectively, and the water distribution trough 11 is located at the center of the water distribution pool 12; an inner water outlet and an outer water outlet are formed on the bottom wall of the water distribution pool 12, the inner water outlet is connected to the inner water distribution channel 13, and the outer water outlet is connected to the outer water distribution channel 14; the distance between the inner water outlet and the water distribution trough 11 is smaller than the distance between the outer water outlet and the water distribution trough 11; the opening and closing device includes a gate 21, which is movably connected to the tower body 1 and is used to control the on and off of the outer water distribution channel 14. When the climate is normal, the external water distribution channel 14 remains in a flowing state, allowing the cooling tower 1000 to exchange heat normally; when the weather is low temperature, the gate 21 is closed so that the water flow in the external water distribution channel 14 is cut off and no longer flows. At this time, the water in the water distribution tank 11 enters the water distribution tank 12 through the internal water distribution channel 13.

[0030] In the technical solution of the present utility model, closing the gate 21 in low temperature weather increases the inner water distribution volume of the water distribution pool 12, increases the water temperature of the inner area, and thus reduces the probability of ice formation in the inner area of ​​the water distribution pool 12; at the same time, the water flow in the outer water distribution channel 14 is cut off, stopping the outer water distribution of the water distribution pool 12, and reducing the probability of ice formation in the outer area of ​​the water distribution pool 12, thus solving the problem of easy ice formation in the outer area of ​​the water distribution pool 12 of the cooling tower 1000 in low temperature weather to a certain extent; and the probability of ice formation in the outer area of ​​the water distribution pool 12 is reduced, and the probability of the cooling tower 1000 blocking the air flow from entering the tower body 1 due to ice formation in the outer area is reduced, so the overall heat exchange effect of the cooling tower 1000 can be improved. At the same time, the heat exchange effect of conventional cooling towers gradually weakens from the outer area to the inner area, while the cooling tower 1000 in the utility model increases the inner water distribution volume at low temperatures, and the water distribution volume for heat exchange in the inner area is increased, thereby improving the heat exchange effect in the inner area of ​​the water distribution pool 12.

[0031] It can be understood that the gate 21 can be set in the middle of the external water distribution channel 14, or can be set at the openings at both ends of the external water distribution channel 14. In one embodiment, the wall of the water distribution tank 11 is formed with a lower water inlet 111, and the lower water inlet 111 is connected to the external water distribution channel 14. The water inlet of the external water distribution channel 14 is set on the wall of the water distribution tank 11, and the gate 21 can also be set in contact with the wall of the water distribution tank 11. Such a setting structure is simple and the movement of the gate 21 is convenient.

[0032] In one embodiment, an upper water inlet 112 is formed on the wall of the water distribution tank 11, the upper water inlet 112 is connected to the inner water distribution channel 13, and the upper water inlet 112 and the lower water inlet 111 are located in the same plane; the gate 21 has a first state, a second state, and a third state; in the first state, the gate 21 does not shield the lower water inlet 111 and the upper water inlet 112; in the second state, the gate 21 shields the upper water inlet 112; in the third state, the gate 21 shields the lower water inlet 111. When the air temperature is normal temperature, the gate 21 is in the first state, at which time the upper water inlet 112 and the lower water inlet 111 are not shielded by the gate 21, the inner water distribution channel 13 and the outer water distribution channel 14 are both connected to the water distribution tank 11 and the water distribution pool 12 to distribute water at the same time, and the large water distribution flow makes the heat exchange effect of the cooling tower 1000 better. When the temperature reaches about 0 degrees Celsius, the gate 21 is adjusted to the second state. At this time, the gate 21 blocks the upper water inlet 112, while the lower water inlet 111 is not blocked. In this way, only the external water distribution channel 14 connects the water distribution trough 11 and the water distribution pool 12 for water distribution. The water distribution is concentrated on the periphery of the water distribution pool 12 to make the peripheral water temperature higher, thereby reducing the probability of freezing of the water distributed by the cooling tower 1000; at the same time, due to the lower air pressure inside the cooling tower 1000, the heat exchange efficiency is lower than that outside the cooling tower 1000. At this time, the heat exchange effect of only distributing water to the periphery of the water distribution pool 12 is better than that of only distributing water to the inner periphery of the water distribution pool 12. When the temperature is lower than minus 10 degrees Celsius, the gate 21 is adjusted to the third state, at which the gate 21 shields the lower water inlet 111, while the upper water inlet 112 is not shielded, so that only the inner water distribution channel 13 connects the water distribution tank 11 and the water distribution pool 12 for water distribution; in severe cold weather, the temperature increase of centralized water distribution is small, and the temperature of the inner periphery of the cooling tower 1000 is higher than that of the outer periphery in the working state, so it is necessary to concentrate the water distribution in the inner periphery of the water distribution pool 12 so that the water temperature in the inner periphery increases more, thereby further reducing the probability of freezing of the water distribution of the cooling tower 1000;

[0033] Specifically, the upper water inlet 112 and the lower water inlet 111 can be arranged with an interval up and down, or with an interval left and right. In one embodiment, the upper water inlet 112 and the lower water inlet 111 are arranged with an interval up and down. The mass of the gate in a conventional cooling tower is relatively large, and it will be affected by a large gravity when it moves to switch the first state, the second state and the third state; while the upper water inlet 112 and the lower water inlet 111 are arranged with an interval up and down, so that the gate 21 moves up and down, so when switching, the gravity received by the gate 21 is in the same straight line as the direction of movement, and the gate 21 will not tilt, so that the movement through the gate 21 is more stable and reliable.

[0034] In one embodiment, the gate 21 is formed with a guide rail, the tower body 1 is formed with a slide groove, and the guide rail and the slide groove are slidably connected. The guide rail and the slide groove limit the moving direction of the gate 21 on the tower body 1, so that the gate 21 keeps moving in a straight line, and the gate 21 does not tilt, so that the movement through the gate 21 is more stable and reliable.

[0035] Furthermore, the gate 21 also includes a sealing strip, which is arranged on the guide rail and abuts against the groove wall of the slide slot to seal the guide rail and the slide slot to prevent the distribution water in the water distribution slot 11 from entering the internal water distribution channel 13 or the external water distribution channel 14 in the gap between the gate 21 and the tower body 1 and flowing to the water distribution tank 12 and causing freezing.

[0036] Specifically, the gate 21 further includes at least two pulleys. In one embodiment, the gate 21 further includes two pulleys, which are arranged at intervals on one side of the bottom wall of the guide rail facing the slide groove; and the sealing strip is arranged on both sides of the guide rail. When the pulleys are installed on the gate 21, the friction force on the gate 21 is smaller when the gate 21 is moved, so the movement is more convenient.

[0037] It can be understood that the gate 21 can be connected to the tower body 1 through a screw rod 22, or can be connected to the tower body 1 through a gear transmission mechanism. In one embodiment, the opening and closing device further includes a screw rod 22, and the gate 21 is connected to the tower body 1 through the screw rod 22. The reciprocating motion of the gate 21 can be achieved by connecting the tower body 1 through the screw rod 22, and the transmission accuracy through the screw rod 22 is higher, so that the distance moved by the gate 21 is more accurate, thereby preventing the water in the water distribution tank 11 from entering the inner water distribution channel 13 or the outer water distribution channel 14 in the gap between the gate 21 and the tower body 1 and flowing to the water distribution tank 12 to cause freezing.

[0038] The driving member for moving the gate 21 may be a hydraulic cylinder or a hoist 23. In one embodiment, the opening and closing device further includes a hoist 23 and a shaft guide frame 24. The hoist 23 is arranged on the tower body 1 and connected to the gate 21 through a screw rod 22. The shaft guide frame 24 is arranged on the tower body 1, and the screw rod 22 is passed through the shaft guide frame 24. The screw rod 22 is passed through the shaft guide frame 24, and the shaft guide frame 24 can orient the screw rod 22 so that the gate 21 will not deviate when it moves.

[0039] In one embodiment, the cooling tower 1000 further includes a temperature measuring device, which is disposed in the water distribution tank 12 and is electrically connected to the hoist 23 through the industrial computer. The temperature measuring device can measure the water temperature in the water distribution tank 12, and transmit the water temperature signal to the industrial computer, which controls the hoist 23 to move the gate 21 so that the gate 21 switches between the first state and the second state, thereby realizing automatic control of the movement of the gate.

[0040] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A cooling tower (1000), characterized in that: include: A tower body (1), the tower body (1) is formed with a water distribution trough (11), a water distribution pool (12), an inner water distribution channel (13) and an outer water distribution channel (14); the water distribution trough (11) is connected to the water distribution pool (12) through the inner water distribution channel (13) and the outer water distribution channel (14), respectively; the water distribution trough (11) is located at the center of the water distribution pool (12); the bottom wall of the water distribution pool (12) is formed with an inner water outlet and an outer water outlet, the inner water outlet is connected to the inner water distribution channel (13), and the outer water outlet is connected to the outer water distribution channel (14); the distance between the inner water outlet and the water distribution trough (11) is smaller than the distance between the outer water outlet and the water distribution trough (11); and An opening and closing device, the opening and closing device comprising a gate (21), the gate (21) being movably connected to the tower body (1) and used for controlling the opening and closing of the external water distribution channel (14).

2. The cooling tower (1000) according to claim 1, characterized in that: A lower water inlet (111) is formed on the wall of the water distribution tank (11), and the lower water inlet (111) is connected to the external water distribution channel (14).

3. The cooling tower (1000) according to claim 2, characterized in that: An upper water inlet (112) is formed on the wall of the water distribution trough (11), the upper water inlet (112) is connected to the inner water distribution channel (13), and the upper water inlet (112) and the lower water inlet (111) are located in the same plane; the gate (21) has a first state, a second state, and a third state; in the first state, the gate (21) does not cover the lower water inlet (111) and the upper water inlet (112); in the second state, the gate (21) covers the upper water inlet (112); in the third state, the gate (21) covers the lower water inlet (111).

4. The cooling tower (1000) according to claim 3, characterized in that: The upper water inlet (112) and the lower water inlet (111) are arranged vertically and spaced apart from each other.

5. The cooling tower (1000) according to any one of claims 1 to 4, characterized in that: The gate (21) is formed with a guide rail, the tower body (1) is formed with a slide groove, and the guide rail and the slide groove are slidably connected.

6. The cooling tower (1000) according to claim 5, characterized in that: The gate (21) further comprises a sealing strip, which is arranged on the guide rail and abuts against a groove wall of the slide groove so that the guide rail is sealed and connected to the slide groove.

7. The cooling tower (1000) according to claim 6, characterized in that: The gate (21) further comprises at least two pulleys, each of which is arranged at intervals on one side of the guide rail facing the bottom wall of the slide groove; and the sealing strip is arranged on both sides of the guide rail.

8. The cooling tower (1000) according to any one of claims 1 to 4, characterized in that: The opening and closing device also includes a screw rod (22), and the gate (21) is connected to the tower body (1) via the screw rod (22).

9. The cooling tower (1000) according to claim 8, characterized in that: The opening and closing device further comprises a gate hoist (23) and a shaft guide frame (24); the gate hoist (23) is arranged on the tower body (1) and connected to the gate (21) via the screw rod (22); the shaft guide frame (24) is arranged on the tower body (1), and the screw rod (22) is passed through the shaft guide frame (24).

10. The cooling tower (1000) according to claim 9, characterized in that: The cooling tower (1000) further comprises a temperature measuring device, which is arranged in the water distribution tank (12) and is electrically connected to the hoist (23).

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