Constant-temperature regulation and control equipment for circulating water for indirect cooling tower

Abstract

The utility model discloses constant-temperature regulation and control equipment for circulating water for an indirect cooling tower, and relates to the technical field of regulation and control equipment. The constant-temperature regulation and control equipment for the circulating water for the indirect cooling tower comprises a temperature sensor main body and a probe, the outer wall of the temperature sensor main body is provided with a mounting plate used for connecting the temperature sensor main body with the outer wall of a cooling triangular radiator, and the probe is in contact with a water body in a circulating water pipeline. According to the device, combined triangular scrapers and auxiliary scrapers are arranged on the outer wall of the probe, and the blades drive the multiple groups of scrapers to rotate along the outer wall of the probe under the impact of water flow, so that impurities covering all parts of the outer wall of the probe are effectively cleaned, the heat transfer surface of the probe is prevented from being covered by the impurities, and accurate detection of the temperature of circulating water by the probe is ensured; other devices can regulate and control the temperature of the circulating water in time according to the water temperature detection result, the temperature of the circulating water is kept in a constant-temperature state, the heat efficiency of a thermal power plant is improved, the devices are protected, and stable operation of the whole power generation process is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of control equipment technology, specifically a constant temperature control device for circulating water in an intercooling tower. Background Technology

[0002] Indirect cooling towers are the main cooling devices for circulating water in thermal power units in thermal power plants. They consist of radiators and towers. The radiators are composed of cooling triangular radiators and circulating water pipes. The cooling triangular radiators and circulating water pipes can be arranged vertically along the bottom of the indirect cooling tower and combined circumferentially to form a cooling triangular unit. In order to maintain a constant temperature of the circulating water, a temperature sensor is installed at the outlet of the cooling triangular radiator near the circulating water pipe to ensure that the circulating water temperature is kept within a suitable range.

[0003] The temperature sensor mainly consists of a temperature sensor body and a probe. The probe is located inside the pipe in the circulating water pipeline and is in complete contact with the water in the pipe. When the circulating water comes into contact with the atmosphere in the indirect cooling tower, it will bring dust and other impurities from the atmosphere into the circulating cooling water. In addition, the circulating water evaporates during the cooling process, which leads to an increase in the salt concentration in the water and the formation of scale such as calcium carbonate and calcium phosphate. This scale will cover the probe surface, thus obscuring the heat transfer surface of the probe, thereby reducing the accuracy of the probe in detecting the circulating water temperature and reducing its heat transfer efficiency. This makes it impossible to accurately control the circulating water temperature in the later stages. In view of the shortcomings of the existing technology, we propose a constant temperature control device for circulating water in indirect cooling towers to solve the above problems. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a constant temperature control device for circulating water in indirect cooling towers. It solves the problem that when circulating water comes into contact with the atmosphere inside the indirect cooling tower, it brings dust and other impurities from the atmosphere into the circulating cooling water. Furthermore, during the cooling process, the evaporation of the circulating water leads to an increase in the salt concentration in the water, forming scale such as calcium carbonate and calcium phosphate. This scale covers the probe surface, obscuring the heat transfer surface of the probe and making it impossible to accurately detect and control the temperature of the circulating water in the later stages.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a constant temperature control device for circulating water in an indirect cooling tower, comprising a temperature sensor body, a probe, and a sealing seat disposed between the temperature sensor body and the probe, wherein a protective mechanism is provided outside the probe, and the protective mechanism includes:

[0006] The bearing housing is fixedly mounted on one side of the sealing seat;

[0007] A hollow tube, the outer wall of which is fixedly connected to the inner wall of the bearing seat, and a number of triangular scrapers for cleaning impurities on the outer wall of the probe are fixedly installed on one side of the hollow tube. A blade for driving the triangular scraper to rotate in a circular motion is provided on one side of the triangular scraper.

[0008] An auxiliary scraper is fixedly connected to the end of a set of triangular scrapers, and the auxiliary scraper is used to clean the impurities adhering to the end of the probe.

[0009] Preferably, a positioning hole is provided on one side of the auxiliary scraper, a positioning rod is fixedly provided at the end of the probe, and the end of the auxiliary scraper away from the triangular scraper is sleeved on the outer wall of the positioning rod through the positioning hole.

[0010] Preferably, the triangular scraper, auxiliary scraper, and blades are all made of corrosion-resistant materials.

[0011] Preferably, an auxiliary component is provided on one side of the hollow tube, which is used to assist in cleaning stubborn impurities on the outer wall of the probe.

[0012] Preferably, the auxiliary component includes an extension tube fixedly disposed on one side of the hollow tube and multiple sets of nozzles disposed on the bottom surface of the extension tube, wherein the bottom surface of the multiple sets of nozzles does not contact the outer wall of the probe.

[0013] Preferably, a conveying pipe is provided on the side of the hollow tube away from the extension pipe, and the conveying pipe is used to convey cleaning agents such as descaling agents.

[0014] Preferably, the outer wall of the temperature sensor body is provided with a mounting plate for connecting the temperature sensor body to the outer wall of the cooling triangular radiator, and the probe is in contact with the water in the circulating water pipeline.

[0015] This utility model discloses a constant temperature control device for circulating water in an indirect cooling tower, which has the following beneficial effects: This constant temperature control device for circulating water in an indirect cooling tower, by setting a combination of triangular scrapers and auxiliary scrapers on the outer wall of the probe, and under the impact of water flow, the blades drive multiple sets of scrapers to rotate along the outer wall of the probe, so as to effectively clean the impurities covering various parts of the outer wall of the probe, avoid the heat transfer surface of the probe being covered by impurities, ensure the probe accurately detects the circulating water temperature, so that other equipment can adjust the circulating water temperature in a timely manner based on the water temperature detection results, so that the circulating water temperature is kept constant, which is conducive to improving the thermal efficiency of thermal power plants, protecting equipment, and ensuring the stable operation of the entire power generation process. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the main structure of the temperature sensor of this utility model;

[0019] Figure 3 This is a schematic diagram of the connection structure between the temperature sensor body and the probe of this utility model;

[0020] Figure 4 This is an exploded view of the probe and protective mechanism of this utility model;

[0021] Figure 5 This is a plan view of the hollow tube, triangular scraper, and blade structure of this utility model;

[0022] Figure 6 This is a schematic diagram of the hollow tube, extension tube, and nozzle connection structure of this utility model;

[0023] Figure 7 This is an exploded view of the triangular scraper and auxiliary scraper structure of this utility model.

[0024] In the diagram: 1. Temperature sensor body; 11. Mounting plate; 2. Probe; 3. Sealing seat; 4. Protective mechanism; 41. Bearing seat; 42. Hollow tube; 43. Triangular scraper; 44. Blade; 45. Auxiliary scraper; 5. Positioning hole; 51. Positioning rod; 6. Auxiliary components; 61. Extension tube; 62. Nozzle; 63. Delivery tube. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments of this utility model are described clearly and completely. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0026] This application provides a constant temperature control device for circulating water in an indirect cooling tower. This solves the problem that when circulating water comes into contact with the atmosphere inside the indirect cooling tower, it brings dust and other impurities from the atmosphere into the circulating cooling water. Furthermore, the evaporation of circulating water during the cooling process leads to an increase in the salt concentration in the water, forming scale such as calcium carbonate and calcium phosphate. This scale covers the probe surface, obscuring the heat transfer surface of the probe and making it impossible to accurately detect and control the circulating water temperature later. This device enables timely cleaning of impurities on the probe surface.

[0027] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0028] This utility model discloses a constant temperature control device for circulating water in an indirect cooling tower.

[0029] According to the appendix Figures 1-7 As shown, the device includes a temperature sensor body 1, a probe 2, and a sealing seat 3 disposed between the temperature sensor body 1 and the probe 2. The outer wall of the temperature sensor body 1 is provided with a mounting plate 11 for connecting the temperature sensor body 1 to the outer wall of the cooling triangular radiator. The probe 2 is in contact with water in the circulating water pipe. The temperature sensor body 1, probe 2, and other components constitute a temperature sensor. (Refer to the attached diagram.) Figure 1-2 The cooling triangular radiator and circulating water pipeline are combined and installed at the bottom of the indirect cooling tower. A set of temperature sensors is installed at the outlet of each cooling triangular radiator. The temperature sensors use a three-wire hard-wired transmission method and communicate with the main DCS via RS485 communication, with flexible configuration functions. The main signals for communication with the main DCS must meet the monitoring requirements of the operators for the equipment at the indirect cooling tower. When the temperature detected by the temperature sensor deviates from the set value, the equipment will automatically activate the corresponding control mechanism to cool the circulating water, keeping the circulating water temperature constant. With the assistance of temperature sensors and other equipment, the cooling efficiency of the indirect cooling tower is effectively improved during the high-temperature period in summer. Through the precise adjustment of the indirect cooling tower fan speed and circulating water flow by the control system, the circulating water temperature can be stably controlled within the design requirements range, keeping the turbine exhaust pressure and vacuum in good condition. In cold winter weather, the heating device is activated in time to avoid the risk of pipe freezing and cracking caused by excessively low circulating water temperature, and also to ensure that the equipment can operate normally in low-temperature environments.

[0030] Drill a hole in the circulating water pipeline and insert the probe 2, which is set at one end of the temperature sensor body 1, into the pipeline so that the probe 2 can fully contact the circulating water. The insertion depth should generally ensure that the sensitive part of the probe is completely submerged in the water.

[0031] See attached document Figures 3-7 The probe 2 is equipped with a protective mechanism 4. When the circulating water comes into contact with the atmosphere inside the cooling tower, it will bring dust and other impurities from the atmosphere into the circulating cooling water. Common microorganisms in the circulating water include bacteria, fungi, and algae. During their growth and reproduction, these microorganisms secrete viscous substances, which combine with suspended particles in the water to form biological slime. These impurities will cover the surface of the probe 2, that is, the heat transfer surface, hindering heat transfer and affecting the probe 2's accurate detection of the circulating water temperature. Therefore, the protective mechanism 4 can prevent the probe 2 from being covered by impurities for a long time. The protective mechanism 4 includes a bearing seat 41, which is fixedly installed on one side of the sealing seat 3. The outer wall of the hollow tube 42 is connected to the bearing seat. The inner wall of 41 is fixedly connected, and a number of triangular scrapers 43 for cleaning impurities on the outer wall of probe 2 are fixedly installed on one side of hollow tube 42. One end of the triangular scraper 43 abuts against the outer wall of probe 2, and a blade 44 for driving the triangular scraper 43 to rotate in a circle is fixedly installed on one side of the triangular scraper 43. The triangular scraper 43, auxiliary scraper 45 and blade 44 are all made of corrosion-resistant materials. Specifically, when circulating water flows in the circulating water pipeline, under the impact of the water flow, the blade 44 can be driven to rotate in a circle around probe 2, thereby driving the triangular scraper 43 fixedly connected to the blade 44 to rotate, so that the triangular scraper 43 can scrape and clean the impurities covering the surface of probe 2, and prevent the impurities from covering the heat transfer surface of probe 2.

[0032] See attached document Figure 4 and attached Figure 7 The auxiliary scraper 45 is fixedly connected to the end of a set of triangular scrapers 43. The auxiliary scraper 45 cleans the impurities adhering to the end of the probe 2. A positioning hole 5 is provided on one side of the auxiliary scraper 45. A positioning rod 51 is fixedly provided at the end of the probe 2. The end of the auxiliary scraper 45 away from the triangular scrapers 43 is sleeved on the outer wall of the positioning rod 51 through the positioning hole 5. The positioning rod 51 can further position the movement of the auxiliary scraper 45.

[0033] See attached document Figure 6-7An auxiliary component 6 is provided on one side of the hollow tube 42. The auxiliary component 6 is used to assist in cleaning stubborn impurities on the outer wall of the probe 2. The auxiliary component 6 includes an extension tube 61 fixedly installed on one side of the hollow tube 42 and multiple sets of nozzles 62 installed on the bottom surface of the extension tube 61. The bottom surface of the multiple sets of nozzles 62 does not contact the outer wall of the probe 2. During the cooling process, the circulating water evaporates, resulting in an increase in the salt concentration in the water, forming scale such as calcium carbonate and calcium phosphate. This scale will cover the surface of the probe 2, reducing the heat transfer efficiency. The hollow tube 42 and the extension tube 61 both contain descaling agents for different types of scale. A delivery pipe 63 is provided on the side away from the extension pipe 61. The delivery pipe 63 is used to deliver cleaning agents such as descaling agents. One end of the delivery pipe 63 is connected to the pump body and the container containing the descaling agent. The pump body and the container containing the descaling agent are not specifically shown in the attached drawings. The specific laying path of the delivery pipe 63 is adjusted according to the installation requirements of the temperature sensor. Specifically, when the triangular scraper 43 rotates in a circle along the outer wall of the probe 2, it can start the pump body and deliver the descaling agent through the delivery pipe 63 to the extension pipe 61, and then spray it on the outer wall of the probe 2 through the nozzle 62, so as to improve the cleaning effect of scale on the outer wall of the probe 2.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A thermostatic control device for circulating water of an indirect cooling tower, comprising a temperature sensor main body (1), a probe (2) and a sealing seat (3) arranged between the temperature sensor main body (1) and the probe (2), characterized in that, The outer part of the probe (2) is provided with a protection mechanism (4), which comprises: A bearing seat (41) is fixedly arranged on one side of the sealing seat (3); A hollow tube (42) is fixedly connected with the inner wall of the bearing seat (41), and a plurality of triangular scrapers (43) for cleaning impurities on the outer wall of the probe (2) are fixedly arranged on one side of the hollow tube (42), and one side of the triangular scraper (43) is provided with a blade (44) for driving the triangular scraper (43) to rotate circumferentially; An auxiliary scraper (45) is fixedly connected with the end of one group of triangular scrapers (43), and the auxiliary scraper (45) is used for cleaning the impurities adhered to the end of the probe (2).

2. The constant temperature regulating device for circulating water of an indirect cooling tower according to claim 1, characterized in that: One side of the auxiliary scraper (45) is provided with a positioning hole (5), and the end of the probe (2) is fixedly provided with a positioning rod (51), and the end of the auxiliary scraper (45) away from the triangular scraper (43) is sleeved on the outer wall of the positioning rod (51) through the positioning hole (5).

3. The constant temperature regulating device for circulating water of an indirect cooling tower according to claim 2, characterized in that: The triangular scraper (43), the auxiliary scraper (45) and the blade (44) are all made of corrosion-resistant material.

4. The constant temperature regulating device for circulating water of an indirect cooling tower according to claim 1, characterized in that: One side of the hollow tube (42) is provided with an auxiliary assembly (6), which is used for auxiliary cleaning of stubborn impurities on the outer wall of the probe (2).

5. The constant temperature regulating device for circulating water of an indirect cooling tower according to claim 4, characterized in that: The auxiliary assembly (6) comprises an extension pipe (61) fixedly arranged on one side of the hollow tube (42) and a plurality of nozzles (62) arranged on the bottom surface of the extension pipe (61), and the bottom surfaces of the plurality of nozzles (62) are not in contact with the outer wall of the probe (2).

6. The constant temperature regulating device for circulating water of an indirect cooling tower according to claim 5, characterized in that: One side of the hollow tube (42) away from the extension pipe (61) is provided with a conveying pipe (63), which is used for conveying cleaning agent.

7. The constant temperature regulating device for circulating water of an indirect cooling tower according to claim 1, characterized in that: The outer wall of the temperature sensor body (1) is provided with a mounting plate (11) for connecting the temperature sensor body (1) with the outer wall of the cooling triangular radiator, and the probe (2) is in contact with the water in the circulating water pipeline.

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