Control system of steam pipeline

Abstract

The utility model relates to a control system of a steam pipeline. The control system comprises a main steam pipeline gate valve, a main steam pipeline pressure reducing valve, a first electric control valve, a first drainage pipeline gate valve, a floating ball drainage valve, a second drainage pipeline gate valve, a drainage pipeline bypass valve, a second electric control valve and a controller. According to the control system, the first electric control valve and the second electric control valve are arranged, and the controller is in communication connection with the air conditioning unit control system, so that an operator can open the steam supply gate valve without going to the site, and the working efficiency of operation is effectively improved. By arranging the first pressure sensor and the first temperature sensor, the pressure and temperature conditions in the steam pipeline can be effectively detected, the pipeline pressure can be automatically adjusted, the problems existing in manual drainage can be effectively solved, and the operation safety and stability of the steam pipeline system are effectively guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of combined air-conditioning units, and in particular to a control system for a steam pipeline. Background Art

[0002] Combined air conditioning unit is an air handling equipment assembled from various air handling functional sections, suitable for air conditioning systems with resistance greater than 100 Pa. The air handling functional sections of the air conditioning unit include air mixing, flow balancing, filtration, cooling, primary and secondary heating, dehumidification, humidification, air supply fan, return fan, water spray, silencer, heat recovery and other units.

[0003] At present, air-conditioning units can be remotely monitored and started and stopped remotely, but the steam pipe system entering the air-conditioning unit cannot be remotely controlled. Before starting the air-conditioning system, the operator needs to manually open the drain pipe bypass valve on site to drain the condensate in the pipe. After the condensate is almost drained, close the drain pipe bypass valve and open the main steam pipe gate valve to supply steam to the air-conditioning unit. After stopping the air-conditioning system, the operator needs to go to the site to close the main steam pipe gate valve.

[0004] In the case of manual operation of the steam pipe system, the operator is generally in charge of 4 to 5 air-conditioning units, and these air-conditioning units are not in the same location. In addition, the steam supply control of the air-conditioning units and the drainage work before starting the units need to be done manually, so the staff has a large workload before starting the air-conditioning units, which takes a long time and the operation efficiency is low. In addition, during manual operation, the discharge amount of condensed water needs to be manually judged. If the drainage time is too long, it will lead to waste of steam energy. If the drainage time is too short, there will be too much condensed water in the steam, which will cause water hammer, resulting in water hammer damage to the heating and humidification coils of the air-conditioning units, and there are certain safety risks in the operation. Utility Model Content

[0005] In order to solve or partially solve the problems existing in the related art, the present application provides a steam pipe control system, which can realize automatic control of the steam pipe system of the combined air-conditioning unit and improve the operating efficiency and safety.

[0006] The present application provides a control system for a steam pipeline, including: a main steam pipeline gate valve, a main steam pipeline pressure reducing valve, a first electric regulating valve, a first drain pipeline gate valve, a float drain valve, a second drain pipeline gate valve, a drain pipeline bypass valve, a second electric regulating valve and a controller;

[0007] The main steam pipeline gate valve, the main steam pipeline pressure reducing valve and the first electric regulating valve are connected in sequence through pipelines, the steam inlet end of the main steam pipeline gate valve is connected to the main steam pipeline, and the steam outlet end of the first electric regulating valve is connected to the air conditioning unit through a pipeline;

[0008] The first drain pipe gate valve, the float drain valve and the second drain pipe gate valve are connected in sequence through pipelines, the steam inlet end of the first drain pipe gate valve is connected to the main steam pipe, and the steam outlet end of the second drain pipe gate valve is connected to the external cooling water recovery system through a pipeline;

[0009] The steam inlet end of the drain pipe bypass valve is connected to the main steam pipe, the steam outlet end of the drain pipe bypass valve is connected to the steam inlet end of the second electric regulating valve, and the steam outlet end of the second electric regulating valve is connected to the external cooling water recovery system through a pipeline;

[0010] The controller establishes electrical connections with the first electric regulating valve and the second electric regulating valve respectively, and establishes a communication connection with the air conditioning unit.

[0011] Optionally, in some embodiments of the present application, the control system further comprises: a first pressure sensor, the first pressure sensor being electrically connected to the controller;

[0012] The first pressure sensor is installed on the steam outlet pipe of the first electric regulating valve.

[0013] Optionally, in some embodiments of the present application, the control system further includes: a first temperature sensor, the first temperature sensor being electrically connected to the controller;

[0014] The first temperature sensor is installed on the main steam pipeline and is located at the front end of the second electric regulating valve.

[0015] Optionally, in some embodiments of the present application, the control system further comprises: a main steam pipeline bypass valve;

[0016] The steam inlet end of the main steam pipeline bypass valve is connected to the main steam pipeline, and the steam outlet end of the main steam pipeline bypass valve is connected to the air conditioning unit.

[0017] Optionally, in some embodiments of the present application, the control system further comprises: a touch screen;

[0018] An electrical connection is established between the touch screen and the controller.

[0019] The technical solution provided by this application may have the following beneficial effects:

[0020] The present application sets up a first electric regulating valve and a second electric regulating valve, and communicates with the air-conditioning unit control system through a controller. The operator does not need to go to the site to open the steam supply gate valve, but can complete it through the corresponding host computer. The control is convenient and the operating efficiency is effectively improved.

[0021] By setting up a first pressure sensor and a first temperature sensor, the present application can effectively detect the pressure and temperature conditions inside the steam pipe, and control the first electric regulating valve and the second electric regulating valve accordingly through a controller, thereby automatically adjusting the pipeline pressure and effectively solving the problems existing in manual draining, thereby effectively ensuring the operating safety and stability of the steam pipe system.

[0022] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and other objects, features and advantages of the present application will become more apparent through a more detailed description of exemplary embodiments of the present application in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the present application.

[0024] Figure 1 It is a structural schematic diagram of a control system of a steam pipeline shown in an embodiment of the present application;

[0025] Figure 2 It is a control structure diagram of the controller shown in the embodiment of the present application.

[0026] Figure numerals: 1-main steam pipe gate valve, 2-main steam pipe pressure reducing valve, 3-first electric regulating valve, 4-first drain pipe gate valve, 5-float drain valve, 6-second drain pipe gate valve, 7-drain pipe bypass valve, 8-second electric regulating valve, 9-first pressure sensor, 10-first temperature sensor, 11-main steam pipe bypass valve, 12-air conditioning unit, 13-controller, 14-touch screen. DETAILED DESCRIPTION

[0027] The embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although the embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0028] It should be understood that although the terms "first", "second", "third", etc. may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of this application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0029] In the description of the present application, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply 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 understood as a limitation on the present application.

[0030] Unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0031] In the case of manual operation of the steam pipe system, the operator is generally in charge of 4 to 5 air-conditioning units, and these air-conditioning units are not in the same location. In addition, the steam supply control of the air-conditioning units and the drainage work before starting the units need to be done manually, so the staff has a large workload before starting the air-conditioning units, which takes a long time and the operation efficiency is low. In addition, during manual operation, the discharge amount of condensed water needs to be manually judged. If the drainage time is too long, it will lead to waste of steam energy. If the drainage time is too short, there will be too much condensed water in the steam, which will cause water hammer, resulting in water hammer damage to the heating and humidification coils of the air-conditioning units, and there are certain safety risks in the operation.

[0032] In response to the above problems, an embodiment of the present application provides a steam pipe control system, which can realize automatic control of the steam pipe system of the combined air-conditioning unit and improve operating efficiency and safety.

[0033] The technical solution of the embodiments of the present application is described in detail below with reference to the accompanying drawings.

[0034] Figure 1 It is a structural schematic diagram of a control system of a steam pipeline shown in an embodiment of the present application;

[0035] Figure 2 It is a control structure diagram of the controller shown in the embodiment of the present application.

[0036] See also Figure 1-2 , a control system for a steam pipeline, comprising: a main steam pipeline gate valve 1, a main steam pipeline pressure reducing valve 2, a first electric regulating valve 3, a first drain pipeline gate valve 4, a float drain valve 5, a second drain pipeline gate valve 6, a drain pipeline bypass valve 7, a second electric regulating valve 8 and a controller 13;

[0037] The main steam pipeline gate valve 1, the main steam pipeline pressure reducing valve 2 and the first electric regulating valve 3 are connected in sequence through pipelines, the steam inlet end of the main steam pipeline gate valve 1 is connected to the main steam pipeline, and the steam outlet end of the first electric regulating valve 3 is connected to the air conditioning unit 12 through a pipeline;

[0038] The first drain pipe gate valve 4, the float drain valve 5 and the second drain pipe gate valve 6 are connected in sequence through pipelines, the steam inlet end of the first drain pipe gate valve 4 is connected to the main steam pipe, and the steam outlet end of the second drain pipe gate valve 6 is connected to the external cooling water recovery system through a pipeline;

[0039] The steam inlet end of the drain pipe bypass valve 7 is connected to the main steam pipe, the steam outlet end of the drain pipe bypass valve 7 is connected to the steam inlet end of the second electric regulating valve 8, and the steam outlet end of the second electric regulating valve 8 is connected to the external cooling water recovery system through a pipeline;

[0040] The controller 13 establishes electrical connections with the first electric regulating valve 3 and the second electric regulating valve 8 respectively, and establishes a communication connection with the air conditioning unit 12 .

[0041] After the connection is completed, under normal circumstances, the power steam flows to the heater and humidifier in the air-conditioning unit 12 through the main steam pipeline gate valve 1, the main steam pipeline pressure reducing valve 2 and the first electric regulating valve 3 to complete the energy exchange. In addition, the condensed water generated by the main steam pipeline can be discharged to the condensed water recovery system through two loops. One loop is that the condensed water generated by the main steam pipeline is discharged to the condensed water recovery system through the first drain pipeline gate valve 4, the float drain valve 5 and the second drain pipeline gate valve 6 in turn, and the other loop is that the condensed water generated by the main steam pipeline is discharged to the condensed water recovery system through the drain pipeline bypass valve 7 and the second electric regulating valve 8 in turn. Among them, the former situation occurs in normal operation, and the latter situation occurs before the air-conditioning unit 12 is started and after it is shut down.

[0042] By setting the first electric regulating valve 3 and the second electric regulating valve 8, and communicating with the air-conditioning unit 12 control system through the controller 13, the operator does not need to go to the site to open the steam supply valve, but can complete it through the corresponding host computer, which is convenient to control and effectively improves the operating efficiency.

[0043] The controller 13 is a PLC controller and has a PID control function module.

[0044] Specifically, the control system further includes: a first pressure sensor 9, which is electrically connected to the controller 13;

[0045] The first pressure sensor 9 is installed on the steam outlet pipe of the first electric regulating valve 3 .

[0046] By setting the first pressure sensor 9, the pressure inside the pipeline can be detected, and the first electric regulating valve 3 can be controlled by the controller 13 to make corresponding adjustments, so as to realize automatic adjustment of the pipeline pressure, ensure the stable operation of the system, and make timely adjustments and responses according to actual needs. Specifically, the controller 13 is set to the reaction control. After starting, the initial opening of the first electric regulating valve 3 is set to be large. Under the control of the controller 13, the first electric regulating valve 3 is slowly closed as the pressure of the steam pipeline increases, until the detected pressure of the steam pipeline reaches the set value, and the first electric regulating valve 3 is controlled to be in the minimum opening state.

[0047] Specifically, the control system further includes: a first temperature sensor 10, wherein an electrical connection is established between the first temperature sensor 10 and the controller 13;

[0048] The first temperature sensor 10 is installed on the main steam pipeline and is located at the front end of the second electric regulating valve 8 .

[0049] By setting up the first temperature sensor 10, the temperature condition inside the pipeline can be detected, and the second electric regulating valve 8 can be controlled by the controller 13 to make corresponding adjustments to realize automatic discharge of condensed water, specifically: the controller 13 is set to reaction control, and after startup, the initial opening of the second electric regulating valve 8 is set to be large. Under the control of the controller 13, the second electric regulating valve 8 slowly closes as the temperature of the steam pipeline increases until the detected temperature of the steam pipeline reaches the set value, and the second electric regulating valve 8 is controlled to be in a completely closed state.

[0050] The reason why the condensate can be automatically discharged is that: when the steam pipe is initially supplied with steam, the pipe temperature is low. At this time, the second electric regulating valve 8 is controlled to be in a fully open state, and the condensate in the pipe is discharged to the condensate collection system. As the steam pipe temperature rises and exceeds the set temperature, the controller 13 controls the second electric regulating valve 8 to be in a closed state; when the air-conditioning unit 12 is shut down, the controller 13 receives a shutdown signal, the main steam pipe stops supplying steam, the steam pipe pressure gradually decreases, and the steam pipe temperature is lower than the set value. The controller 13 controls the second electric regulating valve 8 to open gradually. When the steam pipe pressure is zero, the second electric regulating valve 8 is controlled to be fully opened, and the condensate in the pipe is discharged to the condensate collection system. Through such a control method, the system can realize automatic discharge of condensate, ensuring the normal operation of the steam pipe and the effective treatment of condensate.

[0051] Specifically, the control system further includes: a main steam pipeline bypass valve 11;

[0052] The steam inlet end of the main steam pipeline bypass valve 11 is connected to the main steam pipeline, and the steam outlet end of the main steam pipeline bypass valve 11 is connected to the air conditioning unit 12 .

[0053] The main steam pipeline bypass valve 11 is normally closed and is opened when the main steam pipeline gate valve 1, the main steam pipeline pressure reducing valve 2 and the first electric regulating valve 3 fail. By opening the main steam pipeline bypass valve 11, steam can bypass the failed components and flow directly to the air conditioning unit 12 to maintain normal supply.

[0054] Specifically, the control system further includes: a touch screen 14;

[0055] The touch screen 14 is electrically connected to the controller 13 .

[0056] By arranging the touch screen 14 to cooperate with the corresponding upper computer level, the operator can directly control and monitor the system through touch operation, which improves the convenience and intuitiveness of the operation.

[0057] The technical solution of the embodiment of the present application includes the following beneficial effects:

[0058] The present application sets a first electric regulating valve 3 and a second electric regulating valve 8, and communicates with the air-conditioning unit 12 control system through a controller 13. The operator does not need to go to the site to open the steam supply valve, but can complete it through the corresponding host computer. The control is convenient and the operating efficiency is effectively improved.

[0059] The present application can effectively detect the pressure and temperature conditions inside the steam pipe by setting the first pressure sensor 9 and the first temperature sensor 10, and correspondingly control the first electric regulating valve 3 and the second electric regulating valve 8 through the controller 13, thereby realizing automatic adjustment of the pipe pressure, and effectively solving the problems existing in manual drainage, thereby effectively ensuring the operational safety and stability of the steam pipe system.

[0060] Finally, it should be noted that, in this article, relationships such as first and second, etc. are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms include, include or any other variations are intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0061] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0062] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0063] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application.

[0064] The embodiments of the present application have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A steam pipeline control system, characterized in that: include: A main steam pipeline gate valve (1), a main steam pipeline pressure reducing valve (2), a first electric regulating valve (3), a first drain pipeline gate valve (4), a float drain valve (5), a second drain pipeline gate valve (6), a drain pipeline bypass valve (7), a second electric regulating valve (8) and a controller (13); The main steam pipeline gate valve (1), the main steam pipeline pressure reducing valve (2) and the first electric regulating valve (3) are connected in sequence through pipelines, the steam inlet end of the main steam pipeline gate valve (1) is connected to the main steam pipeline, and the steam outlet end of the first electric regulating valve (3) is connected to the air conditioning unit (12) through a pipeline; The first drain pipe gate valve (4), the float drain valve (5) and the second drain pipe gate valve (6) are sequentially connected through pipelines, the steam inlet end of the first drain pipe gate valve (4) is connected to the main steam pipe, and the steam outlet end of the second drain pipe gate valve (6) is connected to the external cooling water recovery system through a pipeline; The steam inlet end of the drain pipe bypass valve (7) is connected to the main steam pipe, the steam outlet end of the drain pipe bypass valve (7) is connected to the steam inlet end of the second electric regulating valve (8), and the steam outlet end of the second electric regulating valve (8) is connected to the external cooling water recovery system through a pipeline; The controller (13) is electrically connected to the first electric regulating valve (3) and the second electric regulating valve (8), respectively, and a communication connection is established between the controller (13) and the air conditioning unit (12).

2. The control system according to claim 1, characterized in that: The control system further comprises: a first pressure sensor (9), wherein the first pressure sensor (9) is electrically connected to a controller (13); The first pressure sensor (9) is arranged and installed on the steam outlet pipe of the first electric regulating valve (3).

3. The control system according to claim 2, characterized in that: The control system further comprises: a first temperature sensor (10), wherein an electrical connection is established between the first temperature sensor (10) and the controller (13); The first temperature sensor (10) is installed on the main steam pipeline and is located at the front end of the second electric regulating valve (8).

4. The control system according to claim 3, characterized in that: The control system further comprises: a main steam pipeline bypass valve (11); The steam inlet end of the main steam pipeline bypass valve (11) is connected to the main steam pipeline, and the steam outlet end of the main steam pipeline bypass valve (11) is connected to the air conditioning unit (12).

5. The control system according to any one of claims 1 to 4, characterized in that: The control system further comprises: a touch screen (14); An electrical connection is established between the touch screen (14) and the controller (13).

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