Pressure-regulating gas supply device with automatic control function

Abstract

The utility model discloses a pressure regulating air supply device with an automatic control function. The pressure regulating air supply device comprises a self-operated pressure regulating valve, a pressure transmitter and an emptying control valve, the front end of the self-operated pressure regulating valve is connected with a gas source through a pipeline, and the rear end of the self-operated pressure regulating valve is connected with a boiler burner through a pipeline; the pressure transmitter is arranged between the self-operated pressure regulating valve and the boiler burner so as to monitor the pipeline pressure; the pipeline between the self-operated pressure regulating valve and the boiler burner is connected with an emptying pipeline, the emptying control valve is arranged on the emptying pipeline, and the emptying control valve is connected with the pressure transmitter, so that the emptying control valve is opened in an interlocking manner according to a set value of the pressure transmitter, and automatic pressure relief is realized. According to the utility model, the manual operation is reduced, the automation degree of the system is improved, and the smooth ignition of the boiler burner can be realized more safely and reliably.

Description

TECHNICAL FIELD

[0001] The utility model relates to natural gas pressure regulating gas supply technical field, specifically relates to a kind of pressure regulating gas supply device with automatic control function. BACKGROUND

[0002] The pressure regulating gas supply device is a key equipment used in natural gas or liquefied natural gas (LNG) supply system, mainly used for adjusting gas pressure and metering gas flow to ensure safe and stable gas supply to end users. It is widely used in city gate station, storage and distribution station, distribution station and natural gas supply system of small and medium-sized enterprise users and large and medium-sized public building users. It is especially suitable for pressure regulating and metering of normal temperature gas after gasification in LNG storage station.

[0003] Now, in the process of using the pressure regulating gas supply device, when the boiler burner is extinguished, the pressure between the self-operated pressure regulating valve and the boiler burner will rise rapidly due to the "water hammer effect", causing the safety valve to jump, and the safety valve reset pressure is greater than the set pressure of the gas point, so the pressure in the pipeline is higher than the set pressure of the boiler burner. Usually, the boiler burner can be successfully ignited after manual venting treatment of the internal unit. However, the site conditions are complex, which is not easy to operate and manage.

[0004] Therefore, it is necessary to provide a pressure regulating gas supply device with automatic control function, so that the boiler burner can be successfully ignited more safely and reliably. UTILITY MODEL CONTENT

[0005] The utility model aims at: in view of the dependence on manual operation of the pressure regulating gas supply device in the prior art, provide a kind of pressure regulating gas supply device with automatic control function, the device reduces manual operation, improves the degree of automation of system, can more safely and reliably realize the successful ignition of boiler burner.

[0006] The utility model realizes by the following technical scheme:

[0007] The utility model provides a kind of pressure regulating gas supply device with automatic control function, including self-operated pressure regulating valve, pressure transmitter and venting control valve;The front end of the self-operated pressure regulating valve is connected with gas source by pipeline, and the rear end is connected with boiler burner by pipeline;The pressure transmitter is arranged between the self-operated pressure regulating valve and the boiler burner to monitor the pipeline pressure;Venting pipeline is connected on the pipeline between the self-operated pressure regulating valve and the boiler burner, and the venting control valve is arranged on the venting pipeline, and the venting control valve is connected with the pressure transmitter to be interlocked and opened according to the set value of the pressure transmitter, to realize automatic pressure relief.

[0008] As a kind of feasible scheme of the utility model, still include air intake control valve, air intake control valve is set on the front end pipeline of self-operated pressure regulating valve.

[0009] As a kind of feasible scheme of the utility model, still include flowmeter, flowmeter is set on the front end pipeline of self-operated pressure regulating valve.

[0010] As a kind of feasible scheme of the utility model, still include filter, filter is set on the front end pipeline of self-operated pressure regulating valve.

[0011] As a kind of feasible scheme of the utility model, still include pressure gauge before regulating, pressure gauge before regulating is located at the front end of self-operated pressure regulating valve.

[0012] As a kind of feasible scheme of the utility model, still include pressure gauge after regulating, pressure gauge after regulating is located at the rear end of self-operated pressure regulating valve.

[0013] As a kind of feasible scheme of the utility model, still be provided with venting manual valve on the venting pipeline, venting manual valve is located at the front end of venting control valve.

[0014] As a kind of feasible scheme of the utility model, still be provided with flame arrester on the venting pipeline, flame arrester is located at the rear end of venting control valve.

[0015] As a kind of feasible scheme of the utility model, pressure transmitter is electric pressure transmitter, and output electric signal.

[0016] As a kind of feasible scheme of the utility model, venting control valve is electric or pneumatic valve.

[0017] Compared with prior art, the utility model has the following advantages and beneficial effects:

[0018] 1, the pressure regulating gas supply device in the utility model measures and monitors device pressure by setting pressure transmitter between self-operated pressure regulating valve and boiler burner;When the boiler burner is extinguished, the pressure between self-operated pressure regulating valve and boiler burner will rapidly rise, and pressure transmitter interlock opens venting control valve, realizes automatic pressure relief, to protect device body from overpressure, improve the safety of system;When automatic pressure relief is within the ignition pressure range of boiler burner, close venting control valve, to ensure that boiler burner can be successfully started next time;

[0019] 2, the pressure regulating gas supply device in the utility model reduces manual operation, improves the degree of automation of system, can more safely and reliably realize the smooth ignition of boiler burner, with simple structure, high degree of automation, good online detection effect, safe and reliable and the like. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical scheme in the example embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced as follows. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be considered as limiting the scope. For those skilled in the art, other related drawings can be obtained without creative effort based on these drawings. In the drawings:

[0021] Figure 1 The figure is a schematic diagram of the pressure regulating gas supply device with automatic control function in the present application.

[0022] Markings in the drawings and corresponding component names:

[0023] 1 - inlet control valve, 2 - filter, 3 - flow meter, 4 - pressure gauge before pressure regulation, 5 - self-operated pressure regulating valve, 6 - pressure transmitter, 7 - pressure gauge after pressure regulation, 8 - vent manual valve, 9 - vent control valve, 10 - flame arrester. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application will be further described in detail below with embodiments and drawings. The schematic embodiments of the present application and the description thereof are only used to explain the present application, and are not intended to limit the present application.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the specification herein is for describing the specific embodiments only and is not intended to be limiting of the application; the terms "include" and "have" and any variations thereof used in the specification and claims herein are intended to cover a non-exclusive inclusion.

[0026] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features.

[0027] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearance of the phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily independent or alternative embodiments to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0028] In the description of the embodiments of the present application, the term "and / or" is merely an association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of existence of A, existence of A and B, and existence of B. In addition, the character " / " in this paper generally represents that the front and rear associated objects are in an "or" relationship.

[0029] In the embodiments of the present application, the same reference signs represent the same components, and for the sake of brevity, the detailed description of the same components is omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, and the overall thickness, length, width and other dimensions of the integrated device are only exemplary and should not constitute any limitation on the present application.

[0030] In the description of the embodiments of the present application, the term "a plurality of" means two or more (including two), and similarly, "a plurality of groups" means two or more groups (including two groups), and "a plurality of pieces" means two or more pieces (including two pieces), unless otherwise explicitly specified.

[0031] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the embodiments of the present application and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0032] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0033] Please refer to Figure 1This application provides a pressure regulating gas supply device with automatic control function, including a self-regulating pressure regulating valve 5, a pressure transmitter 6, and a vent control valve 9. The front end of the self-regulating pressure regulating valve 5 is connected to a gas source via a pipeline, and the rear end is connected to a boiler burner via a pipeline. The pressure transmitter 6 is disposed between the self-regulating pressure regulating valve 5 and the boiler burner to monitor the pipeline pressure. A vent pipeline is connected to the pipeline between the self-regulating pressure regulating valve 5 and the boiler burner. The vent control valve 9 is disposed on the vent pipeline and is connected to the pressure transmitter 6 to interlock and open according to the set value of the pressure transmitter 6 to achieve automatic pressure relief.

[0034] This application installs a pressure transmitter 6 between the self-regulating pressure regulating valve 5 and the boiler burner, and links the vent control valve 9 on the vent pipeline with the pressure transmitter 6 for control. When the boiler burner is shut down, the pressure between the self-regulating pressure regulating valve 5 and the boiler burner will rise rapidly. When the pressure transmitter 6 reaches its set value, the interlocked vent control valve 9 will open. When the pressure is vented to the set pressure of the boiler burner, the vent control valve 9 will close.

[0035] According to one feasible embodiment of this application, the pressure regulating gas supply device further includes an inlet control valve 1, which is installed on the upstream pipeline of the self-regulating pressure regulating valve 5. In use, gas enters the pressure regulating gas supply device through the inlet control valve 1, and after the pressure is regulated by the self-regulating pressure regulating valve 5, it enters the boiler burner. By setting the inlet control valve 1, the on / off state of the gas in its downstream pipeline can be controlled. When a venting operation is required, the inlet control valve 1 can be closed, thereby preventing gas from continuously entering the pipeline downstream of the inlet control valve 1.

[0036] According to one feasible embodiment of this application, the pressure regulating gas supply device further includes a flow meter 3, which is disposed between the inlet control valve 1 and the self-regulating pressure regulating valve 5. By installing the flow meter 3, gas enters the pressure regulating gas supply device through the inlet control valve 1, is measured by the flow meter 3, and then enters the boiler burner after its pressure is regulated by the self-regulating pressure regulating valve 5.

[0037] According to one feasible embodiment of this application, the pressure regulating gas supply device further includes a filter 2, which is disposed between the inlet control valve 1 and the flow meter 3. By providing the filter 2, impurities carried in the gas can be filtered out, thereby avoiding interference with the normal operation of equipment and devices downstream of the filter 2.

[0038] According to one feasible solution of the present application, the pressure regulating gas supply device further comprises a pre-regulating pressure gauge 4 located at the front end of the self-operated pressure regulating valve 5. Specifically, the pre-regulating pressure gauge 4 is located on the pipeline between the flow meter 3 and the self-operated pressure regulating valve 5 to measure the pipeline pressure before the self-operated pressure regulating valve 5.

[0039] According to one feasible solution of the present application, the pressure regulating gas supply device further comprises a post-regulating pressure gauge 7 located at the rear end of the self-operated pressure regulating valve 5. Specifically, the post-regulating pressure gauge 7 is located on the pipeline between the self-operated pressure regulating valve 5 and the boiler burner to measure the pipeline pressure after the self-operated pressure regulating valve 5.

[0040] According to one feasible solution of the present application, the venting pipeline is further provided with a venting manual valve 8 located at the front end of the venting control valve 9. Specifically, one end of the venting manual valve 8 is connected to the self-operated pressure regulating valve 5, and the other end is connected to the venting control valve 9. By providing the venting manual valve 8, the venting pipeline can be manually disconnected, so that when the venting control valve 9 needs to be repaired or maintained, the venting manual valve 8 can be closed.

[0041] According to one feasible solution of the present application, the venting pipeline is further provided with a flame arrester 10 located at the rear end of the venting control valve 9. By providing the flame arrester 10, the flame at the venting port can be prevented from spreading to the venting control valve 9, thereby achieving high-point safety automatic diffusion.

[0042] According to one feasible solution of the present application, the pressure transmitter 6 is an electric pressure transmitter. Specifically, the electric pressure transmitter 6 is used to monitor the pressure, and its output signal is a direct current signal, which realizes linkage control of the venting control valve 9.

[0043] According to one feasible solution of the present application, the venting control valve 9 is an electric or pneumatic valve. Specifically, the venting control valve 9 can be an electric or pneumatic valve, which cooperates with the pressure transmitter 6 to realize linkage control.

[0044] When the pressure regulating gas supply device in the present application is in operation, gas enters the pressure regulating gas supply device through the gas inlet control valve 1, is metered by the flow meter 3, and then is regulated by the self-operated pressure regulating valve 5 to meet the required pressure of the gas at the gas utilization point. At the same time, the pipeline pressure is measured and monitored by the pressure transmitter 6. One end of the venting manual valve 8 is connected to the self-operated pressure regulating valve 5, and the other end is connected to the venting control valve 9, and the other end of the venting control valve 9 is connected to the flame arrester 10, thereby realizing high-point safety automatic diffusion.

[0045] When the boiler burner is extinguished, due to the "water hammer effect", the pressure between the self-regulating pressure valve 5 and the boiler burner will rapidly rise, closing the air inlet control valve 1, at this time according to the pressure transmitter 6 setting value, the interlocking opening vent control valve 9 is opened, realizing automatic pressure relief; when the pressure is reduced to the ignition pressure range of the boiler burner, the interlocking closing vent control valve 9 is closed, so that the boiler burner can be successfully started next time.

[0046] The above-described specific embodiments have further detailed the purposes, technical solutions and beneficial effects of the present application, and it should be understood that the above-described is only a specific embodiment of the present application and is not used to limit the protection scope of the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A pressure regulating gas supply device with automatic control function, characterized in that, It includes self-operated pressure regulating valve, pressure transmitter and vent control valve; the front end of the self-operated pressure regulating valve is connected with gas source through pipeline, and the rear end is connected with boiler burner through pipeline; the pressure transmitter is arranged between the self-operated pressure regulating valve and the boiler burner to monitor pipeline pressure; the pipeline between the self-operated pressure regulating valve and the boiler burner is connected with vent pipeline, and the vent control valve is arranged on the vent pipeline and connected with the pressure transmitter to be interlocked and opened according to the set value of the pressure transmitter to realize automatic pressure relief.

2. The pressure regulating gas supply device with automatic control function according to claim 1, characterized by, It also includes air inlet control valve, which is arranged on the front end pipeline of the self-operated pressure regulating valve.

3. The pressure regulating gas supply device with automatic control function according to claim 1, characterized by, It also includes flow meter, which is arranged on the front end pipeline of the self-operated pressure regulating valve.

4. The pressure regulating gas supply device with automatic control function according to claim 1, wherein It also includes filter, which is arranged on the front end pipeline of the self-operated pressure regulating valve.

5. The pressure regulating gas supply device with automatic control function according to any one of claims 1 to 4, characterized in that, It also includes pressure gauge before pressure regulating, which is located at the front end of the self-operated pressure regulating valve.

6. The pressure regulating gas supply device with automatic control function according to claim 5, wherein It also includes pressure gauge after pressure regulating, which is located at the rear end of the self-operated pressure regulating valve.

7. The pressure regulating gas supply device with automatic control function according to any one of claims 1 to 4, characterized in that, The vent pipeline is also provided with vent manual valve, which is located at the front end of the vent control valve.

8. The pressure regulating gas supply device with automatic control function according to claim 7, characterized by, The vent pipeline is also provided with flame arrester, which is located at the rear end of the vent control valve.

9. The pressure regulating gas supply device with automatic control function according to claim 1, wherein The pressure transmitter is electric pressure transmitter, which outputs electric signal.

10. The pressure regulating gas supply device with automatic control function according to claim 1, wherein The vent control valve is electric or pneumatic valve.

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