Loop system for automatically controlling steam temperature

Abstract

The utility model relates to the technical field of thermal power generation, and discloses a loop system for automatically controlling steam temperature, which comprises a main pipeline, a return pipeline and an automatic control component arranged on the outer surface of the return pipeline. The side face of the main pipeline is sleeved with two backflow pipelines which communicate with each other, the inner sides of the two backflow pipelines are both connected with flange plates, the opposite sides of the two flange plates are sleeved with control valve bodies, and valve wheels are arranged at the tops of the control valve bodies; the automatic control component comprises an automatic support which is movably installed on the top of the control valve body, and the automatic support is connected with the valve wheel. According to the loop system for automatically controlling the steam temperature, through the connection design of the main pipeline and the backflow pipeline shaped like the Chinese character'yue ', the steam flowing path is effectively optimized, fluid resistance is reduced, the overall performance of the system is improved, and automatic and accurate control over the steam flow is achieved through cooperation of the electric control sliding block, the valve wheel and the limiting supporting rod.

Description

Technical Field

[0001] The utility model relates to the technical field of thermal power generation, in particular to a loop system for automatic steam temperature control. Background Art

[0002] As a part of the automatic control system of the production process of thermal power plants, the steam temperature automatic control loop system is updating at a much faster speed with the rapid development of computer technology, communication technology, control theory and information processing technology. The main function of this system is to maintain the stability of steam temperature through automatic adjustment, thereby ensuring the normal operation of the generator set.

[0003] At present, thermal power plants generally adopt digital, networked and intelligent control systems to monitor and adjust steam temperature in real time through sensors and actuators. In addition, with the application of new materials and new processes, the performance of steam temperature automatic control loop systems is also constantly improving.

[0004] Since the production process of thermal power plants is complex and changeable, the control of steam temperature is often affected by many factors. For a large number of valves, rapid control is required. Therefore, a loop system for automatic steam temperature control is proposed. Utility Model Content

[0005] 1. Technical issues to be solved

[0006] In view of the deficiencies in the prior art, the utility model provides a loop system for automatic steam temperature control, which has the advantages of rapid opening and closing of valves and is convenient for the loop, and solves the problem of difficulty in centralized rapid opening and closing of valves.

[0007] (II) Technical solution

[0008] In order to achieve the above-mentioned purpose of fast opening and closing valves to facilitate the circuit, the utility model provides the following technical solutions: a circuit system for automatic steam temperature control, comprising a main pipeline, a return pipeline and an automatic control component, the return pipeline is arranged on the side of the main pipeline, and the automatic control component is arranged on the outer surface of the return pipeline;

[0009] Two interconnected return pipes are sleeved on the side of the main pipe, the inner sides of the two return pipes are connected with flanges, the opposite sides of the two flanges are sleeved with a control valve body, and a valve wheel is arranged on the top of the control valve body;

[0010] The automatic control component comprises an automatic bracket, which is movably mounted on the top of the control valve body and is connected to the valve wheel.

[0011] As a preferred technical solution of the present utility model, the connection between the main pipeline and the return pipeline is in a "曰" shape. A three-phase pipe valve is sleeved at the connection of the return pipeline on the right side. Two clamping blocks are fixedly installed at the top of the three-phase pipe valve, and clamping grooves are formed on the opposite sides of the two clamping blocks.

[0012] The beneficial effects of the above preferred technical solution are as follows: This design also enhances the structural stability of the pipeline and reduces the risk of pipeline breakage or leakage caused by vibration or other external factors.

[0013] As a preferred technical solution of the present utility model, six equally spaced hole grooves are formed on the front surface of the flange plate. Positioning bolts are fixedly installed on the outer surfaces of the two mutually attached flange plates and are located inside the hole grooves. The flange plate connects adjacent return pipelines.

[0014] The beneficial effects of the above preferred technical solution are as follows: Due to the tight and stable connection, the resistance loss of steam at the pipeline connection is reduced, the steam flow efficiency is improved. At the same time, the steam leakage and energy loss caused by improper pipeline connection are also reduced, thereby improving the thermal efficiency and economic benefits of the system.

[0015] As a preferred technical solution of the present utility model, a control chamber is fixedly installed at the center of the top of the control valve body. A valve rod is threadedly connected to the inner top of the control chamber. The top of the valve rod is fixedly installed with a valve wheel. Six equally spaced limit support rods are arranged on the outer surface of the valve wheel, and a common hand wheel is arranged outside the six limit support rods.

[0016] The beneficial effects of the above preferred technical solution are as follows: By precisely adjusting the position of the valve rod, precise control of the steam flow rate can be achieved, and thus precise adjustment of the steam temperature can be realized.

[0017] As a preferred technical solution of the present utility model, two positioning blocks are fixedly installed on the left and right sides of the top of the control valve body. Automatic brackets are clamped on the tops of the two opposite positioning blocks. The automatic brackets are in an "H" shape. Electric control chutes are formed on the inner tops of the two automatic brackets, and electric control sliders are slidably installed inside the two electric control chutes.

[0018] The beneficial effects of the above preferred technical solution are as follows: By optimizing the structural design and improving the degree of automation, the risk of safety accidents caused by improper human operation or equipment failure can be reduced. At the same time, since the electric control slider can precisely control the opening degree of the valve body, precise adjustment of the steam flow rate can be achieved, thereby ensuring the stability of the steam temperature.

[0019] As a preferred technical solution of the present utility model, a telescopic shaft is installed on the top of the electric control slider in a transmission manner, a rotating wheel is installed on the top of the telescopic shaft in a rotating manner, two engaging rings that are engaged with each other are fixedly installed on the top of the rotating wheel, and the two engaging rings are wound around the outer surface of the limiting support rod. The engaging rings located on the tops of the two electric control sliders are respectively wound around the outside of the relative limiting support rods.

[0020] The beneficial effects of the above preferred technical solution are as follows: improving operation flexibility, stability and reliability, and optimizing the operation experience.

[0021] (III) Beneficial effects

[0022] Compared with the prior art, the present utility model provides a loop system for automatic control of steam temperature, which has the following beneficial effects:

[0023] In the loop system for automatic control of steam temperature, through the connection design of the "曰"-shaped main pipeline and the return pipeline, the path of steam flow is effectively optimized, the fluid resistance is reduced, the overall performance of the system is improved, and with the cooperation of the electric control slider, the valve wheel and the limiting support rod, the automatic and precise control of the steam flow rate is realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic structural diagram of the present utility model;

[0025] Figure 2 It is a schematic structural diagram of the control valve body of the present utility model;

[0026] Figure 3 It is a schematic structural diagram of the flange connection part of the present utility model.

[0027] In the figure: 1, main pipeline; 2, return pipeline; 3, flange; 31, positioning bolt; 4, three-phase pipe valve; 41, clamping block; 42, clamping groove; 5, control valve body; 51, control chamber; 52, positioning block; 6, automatic support; 61, electric control chute; 62, electric control slider; 63, telescopic shaft; 64, rotating wheel; 65, engaging ring; 7, valve wheel; 71, valve rod; 72, limiting support rod; 73, hand wheel. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0029] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0030] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0031] Please refer to Figure 1-3 , a loop system for automatic steam temperature control, including a main pipeline 1, a return pipeline 2, and an automatic control component. The return pipeline 2 is arranged on the side of the main pipeline 1, and the automatic control component is arranged on the outer surface of the return pipeline 2.

[0032] Two interconnected return pipelines 2 are sleeved on the side of the main pipeline 1. Flange plates 3 are connected to the inner sides of the two return pipelines 2. A control valve body 5 is sleeved on the opposite sides of the two flange plates 3, and a valve wheel 7 is arranged on the top of the control valve body 5.

[0033] In this embodiment, the connection shape of the main pipeline 1 and the return pipeline 2 is in a "曰" shape. A three-phase pipe valve 4 is sleeved at the connection of the return pipeline 2 on the right side. Two clamping blocks 41 are fixedly installed on the top of the three-phase pipe valve 4. Slots 42 are opened on the opposite sides of the two clamping blocks 41. The design of the clamping blocks 41 and the slots 42 facilitates the installation and fixation of the expansion components at the top of the three-phase pipe valve 4. Through the tight fit of the slots 42, it can ensure that the expansion components are firmly installed on the three-phase pipe valve 4. The expansion components can be added as devices such as air flow valves.

[0034] It should be noted that the "曰"-shaped connection design can effectively optimize the steam flow path, reduce the resistance of the fluid in the pipeline, thereby improving the steam flow efficiency and the overall performance of the system. At the same time, this design also enhances the structural stability of the pipeline and reduces the risk of pipeline breakage or leakage caused by vibration or other external factors.

[0035] The introduction of the three-phase pipe valve 4 provides the system with more flexible and accurate steam flow control. By adjusting the opening of the three-phase pipe valve 4, the steam flow can be accurately regulated, thereby achieving accurate control of the steam temperature, thereby facilitating the maintenance of the stability of the steam temperature.

[0036] In this embodiment, six equally spaced holes are provided on the front of the flange 3. This design not only improves the structural strength of the flange, but also provides more fixing points for its connection with the return pipe 2. The outer surfaces of the two fitting flanges 3 are fixedly installed with positioning bolts 31 located on the inner side of the holes. The cooperation between the positioning bolts 31 and the holes makes the installation of the flange 3 more precise and stable. This connection method ensures that the connection between the return pipe 2 is tight and reliable, prevents steam leakage, and thus ensures the safety and stability of the system.

[0037] In this embodiment, a control chamber 51 is fixedly installed at the top center of the control valve body 5, and a valve stem 71 is threadedly connected to the inner top of the control chamber 51. The top of the valve stem 71 is fixedly installed with the valve wheel 7. The outer surface of the valve wheel 7 is provided with six equally spaced limit support rods 72, and a common hand wheel 73 is provided on the outer side of the six limit support rods 72.

[0038] It should be noted that, through the design of the control chamber 51 , the valve stem 71 can be stably mounted on the control valve body 5 , and a tight fit is achieved through threaded connection, thereby improving the stability and reliability of the valve stem 71 .

[0039] The design of the position-limiting support rod 72 enables the hand wheel 73 to be firmly mounted on the valve wheel 7 and prevents the hand wheel 73 from slipping or deflecting during operation.

[0040] The automatic control component comprises an automatic bracket 6 , which is movably mounted on the top of the control valve body 5 , and the automatic bracket 6 is connected to the valve wheel 7 .

[0041] In this embodiment, two positioning blocks 52 are fixedly installed on the left and right sides of the top of the control valve body 5, and the tops of the two opposite positioning blocks 52 are clamped with automatic brackets 6. The automatic bracket 6 has an "H"-shaped structure, and the inner tops of the two automatic brackets 6 are provided with electric control grooves 61, and the inner sides of the two electric control grooves 61 are slidably installed with electric control sliders 62.

[0042] It should be noted that the automatic bracket 6 adopts an "H"-shaped structural design, which not only has good load-bearing capacity and stability, but also can effectively disperse the load and reduce the risk of damage caused by stress concentration. At the same time, the "H"-shaped structure also provides a suitable space for the installation of the electric control slide 61 and the electric control slider 62, making the entire control system more compact and efficient.

[0043] The sliding installation design of the electric control chute 61 and the electric control slider 62 enables the control system to have higher flexibility and automation. By precisely controlling the sliding of the slider in the chute in an electric control manner, rapid and accurate adjustment of the control valve body 5 can be achieved. This design not only improves the response speed and control accuracy of the system but also reduces the risk of human operation errors.

[0044] Through the fixed installation of the positioning block 52, the automatic bracket 6 can be stably and precisely installed on the control valve body 5. This design not only improves the structural stability of the entire control system but also makes subsequent maintenance and replacement work more convenient. It can be disassembled for easy assembly.

[0045] In this embodiment, a telescopic shaft 63 is installed at the top of the electric control slider 62 in a driving manner. A rotating wheel 64 is installed at the top of the telescopic shaft 63 in a rotating manner. Two engaging rings 65 that are engaged with each other are fixedly installed at the top of the rotating wheel 64. The two engaging rings 65 surround the outer surface of the limit support rod 72. The engaging rings 65 at the tops of the two electric control sliders 62 respectively surround the outside of the relative limit support rod 72.

[0046] It should be noted that through the design of the engaging ring 65, a stable connection between the rotating wheel 64 and the limit support rod 72 is achieved. The engaging ring 65 surrounds the outer surface of the limit support rod 72. By means of the relative sliding of the two electric control sliders 62, the valve wheel 7 is driven to rotate, which is used to operate the opening and closing of the control valve body 5 to achieve automatic control.

[0047] The working principle of the above embodiment is as follows:

[0048] Steam flows in the main pipeline 1. When the steam temperature needs to be adjusted, the system will adjust the steam flow rate in the return pipeline 2 through the automatic control component 6. When at the connection of the return pipeline 2, through the cooperation of the valve stem 71 and the valve wheel 7, and by means of the engaging ring 65 at the top of the electric control slider 62, which surrounds the outer surface of the limit support rod 72, the hand wheel 73 is driven to rotate through relative sliding, thereby changing the opening degree of the control valve body 5 to achieve precise control of the steam flow rate.

[0049] The beneficial effects of the above embodiment are as follows:

[0050] Through the connection design of the "曰"-shaped main pipeline 1 and the return pipeline 2, the steam flow path is effectively optimized, the fluid resistance is reduced, and the overall performance of the system is improved. By means of the cooperation of the electric control slider 62 with the valve wheel 7 and the limit support rod 72, automatic and precise control of the steam flow rate is achieved.

[0051] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A loop system for automatic control of steam temperature, comprising a main pipeline, a reflux pipeline and an automatic control component. The reflux pipeline is arranged on the side of the main pipeline, and the automatic control component is arranged on the outer surface of the reflux pipeline; Features: Two interconnected reflux pipelines are sleeved on the side of the main pipeline. Flange plates are connected to the inner sides of the two reflux pipelines. A control valve body is sleeved on the opposite sides of the two flange plates. A valve wheel is arranged on the top of the control valve body; The automatic control component includes an automatic support, which is movably installed on the top of the control valve body and is connected to the valve wheel.

2. A loop system for automatic steam temperature control according to claim 1, characterized in that: The connection between the main pipeline and the reflux pipeline is in a "曰” shape. A three-phase pipe valve is sleeved at the connection of the reflux pipeline on the right side. Two blocks are fixedly installed on the top of the three-phase pipe valve, and clamping grooves are arranged on the opposite sides of the two blocks.

3. A loop system for automatic steam temperature control according to claim 1, characterized in that: Six equally spaced hole grooves are arranged on the front of the flange plate. Positioning bolts located inside the hole grooves are fixedly installed on the outer surfaces of the two mutually fitting flange plates. The flange plates connect the adjacent reflux pipelines.

4. A loop system for automatic steam temperature control according to claim 1, characterized in that: A control chamber is fixedly installed at the center of the top of the control valve body. A valve rod is threadedly connected to the inner top of the control chamber. The top of the valve rod is fixedly installed with the valve wheel. Six equally spaced limit support rods are arranged on the outer surface of the valve wheel. A common hand wheel is arranged on the outer sides of the six limit support rods.

5. A loop system for automatic steam temperature control according to claim 4, characterized in that: Two positioning blocks are fixedly installed on the left and right sides of the top of the control valve body. The automatic supports are clamped on the tops of the two opposite positioning blocks. The automatic support is in an "H” shaped structure. Electric control chutes are arranged on the inner tops of the two automatic supports. Electric control sliders are slidably installed inside the two electric control chutes.

6. A loop system for automatic steam temperature control according to claim 5, characterized in that: A telescopic shaft is drivingly installed on the top of the electric control slider. A rotating wheel is rotatably installed on the top of the telescopic shaft. Two engaging rings that are mutually clamped are fixedly installed on the top of the rotating wheel. The two engaging rings are wound around the outer surface of the limit support rod. The engaging rings located on the tops of the two electric control sliders are respectively wound around the outer sides of the opposite limit support rods.

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