Valve group of steam supply system of air conditioner

Abstract

The invention provides an air conditioner steam supply system valve group which comprises a main valve, a filter, a safety valve, a first-path valve group and a second-path valve group, the air inlet end of the main valve is used for being connected with a steam source, and the air outlet end of the main valve is connected with the air inlet end of the filter; the air outlet end of the filter is connected with the air inlet end of a first steam supply pipeline in the first valve set and the air inlet end of a second steam supply pipeline in the second valve set. The air outlet end of the first steam supply pipeline and the air outlet end of the second steam supply pipeline are connected to the air inlet end of the safety valve. A first branch valve used for controlling connection and disconnection of the first steam supply pipeline is arranged in the first valve group, and a second branch valve used for controlling connection and disconnection of the second steam supply pipeline is arranged in the second valve group. According to the invention, non-stop maintenance can be realized, so that efficient operation of downstream equipment is fully ensured, and the production efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of air conditioning systems in cigarette factories, and particularly relates to a valve group for an air conditioning steam supply system. Background Art

[0002] Generally, cigarette factories have multiple sets of process air conditioners, but they share a single pipeline for steam supply to ensure the environmental process conditions in the silk reeling workshop, cigarette making and packing workshop, silk storage room, silk blending room, and auxiliary material room. Steam supply is the basic guarantee for air conditioner operation, and the required steam pressure is between 0.25 Mpa and 0.35 MPa. However, once a failure occurs in the current steam supply pipeline, it is necessary to shut down for maintenance, resulting in low production efficiency.

[0003] Therefore, how to design a valve group for an air conditioning steam supply system to achieve maintenance without shutdown and improve production efficiency has become a technical problem urgently to be solved by those skilled in the art. Summary of the Invention

[0004] The purpose of the invention is to provide a valve group for an air conditioning steam supply system to solve the above-mentioned technical problems in the prior art.

[0005] To achieve the above purpose, the invention provides the following technical solutions:

[0006] A valve group for an air conditioning steam supply system includes a main valve, a filter, a safety valve, a first path valve group, and a second path valve group. The inlet end of the main valve is used to connect to a steam source, the outlet end of the main valve is connected to the inlet end of the filter, the outlet end of the filter is respectively connected to the inlet end of a first steam supply pipeline in the first path valve group and the inlet end of a second steam supply pipeline in the second path valve group, and the outlet ends of the first steam supply pipeline and the second steam supply pipeline are respectively connected to the inlet end of the safety valve; in the first path valve group, there is a first branch valve for controlling the on-off of the first steam supply pipeline, and in the second path valve group, there is a second branch valve for controlling the on-off of the second steam supply pipeline.

[0007] Preferably, it further includes a host computer. The first path valve group includes the first branch valve, a first self-operated pressure reducing valve, a first electric pressure regulating and flow regulating valve, and a first maintenance valve sequentially arranged on the first steam supply pipeline. A first pressure transmitter is arranged on the first electric pressure regulating and flow regulating valve. The signal output end of the first pressure transmitter is electrically connected to the signal input end of the host computer, and the first electric pressure regulating and flow regulating valve is electrically connected to the signal output end of the host computer.

[0008] Preferably, the second valve group includes a second branch valve, a second self-operated pressure reducing valve, a second electric pressure regulating and flow regulating valve, and a second maintenance valve that are sequentially arranged on the second steam supply pipeline. A second pressure transmitter is arranged on the second electric pressure regulating and flow regulating valve. The signal output end of the second pressure transmitter is electrically connected to the signal input end of the upper computer, and the second electric pressure regulating and flow regulating valve is electrically connected to the signal output end of the upper computer.

[0009] Preferably, the first valve group further includes a first vent and pressure relief valve and a first pressure gauge, which are sequentially arranged on the first steam supply pipeline between the first branch valve and the first self-operated pressure reducing valve.

[0010] Preferably, the second valve group further includes a second vent and pressure relief valve and a second pressure gauge, which are sequentially arranged on the second steam supply pipeline between the second branch valve and the second self-operated pressure reducing valve.

[0011] Preferably, a third pressure gauge is arranged on the first steam supply pipeline between the first self-operated pressure reducing valve and the first electric pressure regulating and flow regulating valve.

[0012] Preferably, a fourth pressure gauge is arranged on the second steam supply pipeline between the second self-operated pressure reducing valve and the second electric pressure regulating and flow regulating valve.

[0013] Preferably, both the first electric pressure regulating and flow regulating valve and the second electric pressure regulating and flow regulating valve have two control modes: manual control and automatic control.

[0014] The beneficial effects of the present invention are as follows:

[0015] For the valve group of the air-conditioning steam supply system of the present invention, when in use, the first valve group and the second valve group are used as spares for each other. When one valve group fails and needs to be repaired, the other valve group is enabled, so that maintenance can be carried out without shutting down the machine, which can fully ensure the efficient operation of downstream equipment and thus improve production efficiency. At the same time, the filter can filter with high precision and effectively intercept rust, welding slag and impurities in the pipeline, avoid jamming of the valve group actuator, and reduce the maintenance frequency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the embodiments, and will further describe the specific embodiments of the present invention in detail in combination with the drawings, where

[0017] Figure 1 is a schematic diagram of the valve group of the air-conditioning steam supply system provided by the embodiment of the present invention.

[0018] Reference numerals in the drawings:

[0019] 1. Main valve; 2. Filter; 3. Safety valve; 4. First branch valve;

[0020] 5. First self-operated pressure reducing valve; 6. First electric pressure regulating and flow regulating valve;

[0021] 7. First pressure transmitter; 8. First maintenance valve; 9. Fourth pressure gauge;

[0022] 10. Second branch valve; 11. Second self-operated pressure reducing valve;

[0023] 12. Second electric pressure regulating and flow regulating valve; 13. Second pressure transmitter;

[0024] 14. Second maintenance valve; 15. Third pressure gauge; 16. First drain and pressure relief valve;

[0025] 17. First pressure gauge; 18. First drain and pressure relief valve; 19. Second pressure gauge;

[0026] 20. First steam supply pipeline; 21. Second steam supply pipeline. Detailed implementation mode

[0027] Now, various exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that: Unless otherwise specifically stated, the relative arrangements, numerical expressions, and numerical values of the components and steps set forth in these embodiments do not limit the scope of the present invention.

[0028] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way a limitation on the present invention, its application, or its use.

[0029] Techniques, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be regarded as part of the specification.

[0030] In all the examples shown and discussed here, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values.

[0031] As Figure 1As shown in the figure, an embodiment of the present invention provides a valve group for an air-conditioning steam supply system, which includes a main valve 1, a filter 2, a safety valve 3, a first path valve group, and a second path valve group. The inlet end of the main valve 1 is used to connect to a steam gas source, the outlet end of the main valve is connected to the inlet end of the filter, the outlet end of the filter 2 is respectively connected to the inlet end of the first steam supply pipeline 20 in the first path valve group and the inlet end of the second steam supply pipeline 21 in the second path valve group, and the outlet ends of the first steam supply pipeline and the second steam supply pipeline are respectively connected to the inlet end of the safety valve 3; in the first path valve group, there is a first branch valve 4 for controlling the on-off of the first steam supply pipeline, and in the second path valve group, there is a second branch valve 10 for controlling the on-off of the second steam supply pipeline.

[0032] For the valve group of the air-conditioning steam supply system provided by the embodiment of the present invention, when in use, the first path valve group and the second path valve group are backup for each other. When one path valve group fails and needs to be repaired, the other path valve group is enabled, so that maintenance can be carried out without shutting down the machine, which can fully ensure the efficient operation of downstream equipment and thus improve production efficiency; at the same time, the filter 2 can filter with high precision and effectively intercept rust, welding slag, and impurities in the pipeline, avoiding the jamming of the valve group actuator and reducing the maintenance frequency.

[0033] Further, the valve group of the air-conditioning steam supply system further includes a host computer. The first path valve group includes the first branch valve, the first self-operated pressure reducing valve 5, the first electric pressure regulating and flow regulating valve 6, and the first maintenance valve 8 arranged in sequence on the first steam supply pipeline. A first pressure transmitter 7 is arranged on the first electric pressure regulating and flow regulating valve. The signal output end of the first pressure transmitter is electrically connected to the signal input end of the host computer, and the first electric pressure regulating and flow regulating valve is electrically connected to the signal output end of the host computer.

[0034] Specifically, the second path valve group includes the second branch valve, the second self-operated pressure reducing valve 11, the second electric pressure regulating and flow regulating valve 12, and the second maintenance valve 14 arranged in sequence on the second steam supply pipeline. A second pressure transmitter is arranged on the second electric pressure regulating and flow regulating valve. The signal output end of the second pressure transmitter 13 is electrically connected to the signal input end of the host computer, and the second electric pressure regulating and flow regulating valve 12 is electrically connected to the signal output end of the host computer.

[0035] Further, the first valve group further includes a first drain and pressure relief valve 16 and a first pressure gauge 17, which are sequentially arranged on the first steam supply pipeline between the first branch valve and the first self-operated pressure reducing valve. With this solution, the operating pressure on the first steam supply pipeline between the first branch valve and the first self-operated pressure reducing valve in the first valve group can be detected by the first pressure gauge; during maintenance, when the first drain and pressure relief valve is opened, the remaining steam pressure can be prevented from scalding personnel.

[0036] Preferably, the second valve group further includes a second drain and pressure relief valve 18 and a second pressure gauge 19, which are sequentially arranged on the second steam supply pipeline between the second branch valve and the second self-operated pressure reducing valve. With this solution, the operating pressure on the second steam supply pipeline between the second branch valve and the first self-operated pressure reducing valve in the second valve group can be detected by the second pressure gauge; during maintenance, when the second drain and pressure relief valve is opened, the remaining steam pressure can be prevented from scalding personnel.

[0037] Further, a third pressure gauge 15 is arranged on the first steam supply pipeline between the first self-operated pressure reducing valve and the first electric pressure and flow regulating valve, so that the pressure value of the first steam supply pipeline between the first self-operated pressure reducing valve and the first electric pressure and flow regulating valve can be monitored at any time through the third pressure gauge, facilitating the adjustment of the working state at any time.

[0038] Preferably, a fourth pressure gauge 9 is arranged on the second steam supply pipeline between the second self-operated pressure reducing valve and the second electric pressure and flow regulating valve. Thus, the pressure value of the second steam supply pipeline between the second self-operated pressure reducing valve and the second electric pressure and flow regulating valve can be monitored at any time through the fourth pressure gauge, facilitating the adjustment of the working state at any time.

[0039] Specifically, both the first electric pressure and flow regulating valve and the second electric pressure and flow regulating valve have two control modes: manual control and automatic control, so that the first electric pressure and flow regulating valve and the second electric pressure and flow regulating valve can be manually controlled and automatically controlled.

[0040] The general working process of the valve group of the air-conditioning steam supply system of the present invention is as follows:

[0041] During specific operation, the steam source is transmitted through the main valve 1 and the filter 2 and then divided into two valve groups, namely the first valve group and the second valve group. The main valve 1 is used to control the on-off of the entire system;

[0042] Among them, the first valve group and the second valve group are in standby with each other. During normal operation, operations are carried out on the upper computer. Only one valve group is allowed to operate at a time. Each group has manual control and automatic control functions, a parameter modification function, an alarm and a function of stopping operation in case of failure; it operates in two modes, namely the summer mode and the winter mode automatically;

[0043] In spring and autumn, according to the external environmental temperature, the parameters of the electric pressure and flow regulating valve can be set in the range of 0.2 MPa - 0.35 MPa to make the valve group operate manually; when the first valve group is actually operating, the steam source provided by the separate steam header is about 1.0 MPa. After passing through the main valve 1, filter 2, first branch valve 4, it is reduced to 0.3 MPa by the first self-operated pressure reducing valve 5 to reduce the back pressure of the first electric pressure and flow regulating valve and adapt to the operating range of the first electric pressure and flow regulating valve 6. The upper computer controls the opening of the first electric pressure and flow regulating valve 6 according to the signal fed back by the first pressure transmitter 7. The first electric pressure and flow regulating valve 6 adjusts its opening in real time between 0 - 100 according to the steam consumption of the downstream air-conditioning unit to meet the operating requirements of the air-conditioning unit; the upper computer monitors and operates the control of the first electric pressure and flow regulating valve 6 in real time according to the requirements of the air-conditioning unit. The first electric pressure and flow regulating valve 6 has manual control and automatic control functions, parameter modification function, alarm and stop operation functions, avoiding the problem of being time-consuming and laborious caused by going to the site to close the main valve 1 to cut off the steam source after the air-conditioning unit stops running.

[0044] When overhauling the first valve group, the upper computer is used to control the stop of the operation of the first valve group. At the same time, the second valve group is started to operate. The power supply of the first valve group is disconnected, and the first branch valve 4 and the first maintenance valve 8 are closed, then the first valve group can be overhauled; similarly, this method can be used to overhaul the second valve group.

[0045] When the steam pressure fluctuates in the present invention, the pressure transmitter gives control and feedback signals, enabling the upper computer to adjust the two valve groups; the two valve groups are used as spares for each other. When one road needs to be overhauled due to a fault, the upper computer directly issues a control command. While closing this road valve group, it controls the other road valve group to start operating. At the same time, the present invention can perform dual-mode switching during operation: in summer mode, according to the relevant parameters such as the steam pressure, temperature, and flow rate used in the air-conditioning, the opening of the working electric pressure and flow regulating valve is adjusted to achieve precise matching through the steam flow rate; in winter mode, according to the relevant parameters such as the steam pressure, temperature, and flow rate used in the air-conditioning, the opening of the working electric pressure and flow regulating valve is adjusted to achieve precise matching through the steam flow rate, avoiding overpressure and underpressure phenomena in the steam supply pipeline, improving the stability of the steam supply pressure, achieving precise gas supply, improving the stable continuity of the safe operation of the air-conditioning, and achieving energy conservation and consumption reduction.

[0046] Although some specific embodiments of the present invention have been described in detail by way of examples, those skilled in the art should understand that the above examples are only for illustration and not for limiting the scope of the present invention. Those skilled in the art should understand that the above embodiments can be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A valve group for an air conditioning steam supply system, characterized in that: It includes a main valve, a filter, a safety valve, a first valve group and a second valve group. The air inlet end of the main valve is used to connect to a steam source, the air outlet end of the main valve is connected to the air inlet end of the filter, the air outlet end of the filter is respectively connected to the air inlet end of a first steam supply pipeline in the first valve group and the air inlet end of a second steam supply pipeline in the second valve group, the air outlet end of the first steam supply pipeline and the air outlet end of the second steam supply pipeline are respectively connected to the air inlet end of the safety valve; the first valve group is provided with a first branch valve for controlling the on-off of the first steam supply pipeline, and the second valve group is provided with a second branch valve for controlling the on-off of the second steam supply pipeline.

2. The air conditioning steam supply system valve group according to claim 1, characterized in that: It also includes a host computer, and the first valve group includes the first branch valve, the first self-powered pressure reducing valve, the first electric pressure regulating and flow regulating valve and the first inspection valve which are sequentially arranged on the first steam supply pipeline. The first electric pressure regulating and flow regulating valve is provided with a first pressure transmitter, and the signal output end of the first pressure transmitter is electrically connected to the signal input end of the host computer, and the first electric pressure regulating and flow regulating valve is electrically connected to the signal output end of the host computer.

3. The air conditioning steam supply system valve group according to claim 2, characterized in that: The second valve group includes the second branch valve, the second self-operated pressure reducing valve, the second electric pressure regulating and flow regulating valve and the second inspection valve which are sequentially arranged on the second steam supply pipeline. The second electric pressure regulating and flow regulating valve is provided with a second pressure transmitter. The signal output end of the second pressure transmitter is electrically connected to the signal input end of the host computer, and the second electric pressure regulating and flow regulating valve is electrically connected to the signal output end of the host computer.

4. The air conditioning steam supply system valve group according to claim 2, characterized in that: The first valve group further includes a first exhaust pressure relief valve and a first pressure gauge, which are sequentially arranged on the first steam supply pipeline between the first branch valve and the first self-operated pressure reducing valve.

5. The air conditioning steam supply system valve group according to claim 3, characterized in that: The second valve group also includes a second exhaust pressure relief valve and a second pressure gauge which are sequentially arranged on the second steam supply pipeline between the second branch valve and the second self-operated pressure reducing valve.

6. The air conditioning steam supply system valve group according to claim 2, characterized in that: A third pressure gauge is provided on the first steam supply pipeline between the first self-operated pressure reducing valve and the first electric pressure regulating and flow regulating valve.

7. The air conditioning steam supply system valve group according to claim 3, characterized in that: A fourth pressure gauge is provided on the second steam supply pipeline between the second self-operated pressure reducing valve and the second electric pressure regulating and flow regulating valve.

8. The air conditioning steam supply system valve group according to any one of claims 2 to 7, characterized in that: The first electric pressure-regulating and flow-regulating valve and the second electric pressure-regulating and flow-regulating valve both have two control modes: manual control and automatic control.

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