CN219607526U - Adjustable continuous combustion system for sand core surface drying furnace - Google Patents

Adjustable continuous combustion system for sand core surface drying furnace Download PDF

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Publication number
CN219607526U
CN219607526U CN202223411096.XU CN202223411096U CN219607526U CN 219607526 U CN219607526 U CN 219607526U CN 202223411096 U CN202223411096 U CN 202223411096U CN 219607526 U CN219607526 U CN 219607526U
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natural gas
sand core
control valve
burner
drying furnace
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郭帅
毛昌国
李保强
陈珂乐
杜莹莹
闫少华
朱雷
宋航帆
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SIPPR Engineering Group Co Ltd
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SIPPR Engineering Group Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/10—Reduction of greenhouse gas [GHG] emissions
    • Y02P10/143—Reduction of greenhouse gas [GHG] emissions of methane [CH4]

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Abstract

The utility model discloses an adjustable continuous combustion system for a sand core surface drying furnace, which comprises a combustion chamber, a burner, a natural gas conveying pipeline and an air supply pipeline, wherein the combustion chamber, the burner, the natural gas conveying pipeline and the air supply pipeline are arranged outside the sand core drying furnace; one end of the natural gas conveying pipeline is connected with a natural gas interface of the burner and the other end of the natural gas conveying pipeline is connected with a gas source, a manual control valve, an electromagnetic valve and a proportional valve are sequentially arranged on the natural gas conveying pipeline from the gas source to the burner, and a pressure interface of the proportional valve is connected with an air supply pipeline between the first control valve and the second control valve. The utility model has simple pipeline, lower requirement on the use environment, no intentional requirement on the pressure of the combustion chamber, simple maintenance, and capability of completely replacing the existing burner matched with the sand core surface drying furnace and reducing the maintenance difficulty.

Description

Adjustable continuous combustion system for sand core surface drying furnace
Technical Field
The utility model relates to the field of workpiece casting, in particular to an adjustable continuous combustion system for a sand core surface drying furnace.
Background
The workpiece casting is generally prepared by the following processes: and (3) producing the sand core by using an internal core making machine, dip-coating the sand core, then, putting the sand core into a sand core surface drying furnace for drying, and then, casting out the product. Therefore, the sand core surface drying furnace is an essential process device in the casting industry. At present, most of sand core surface drying furnaces take natural gas as a main energy source, a Bai De burner or a Wei Song burner is used as a combustion heating system for heating, and the temperature in the sand core surface drying chamber is controlled at 150-220 ℃ so as to meet the drying requirement of the sand core.
Most of the existing combustion machines in the market are integrated combustion technologies, are compact in structure, have very high requirements on the use environment, are generally used in clean working environments, and require normal pressure. However, the sand core surface dry furnace is generally positioned in a foundry, the workshop environment is poor, the combustion chamber of the sand core surface dry furnace is in a negative pressure environment, so that faults such as unsmooth ignition or fire-cutting-off site when big and small fires are switched after the combustion machine is used for a period of time are caused, the maintenance is frequent, the requirement on maintenance personnel is high, and one combustion machine is replaced every two years on average, so that the investment of enterprises is increased; the energy consumption of the burner is higher, and the production cost of casting enterprises is further increased.
In order to solve the problems of high maintenance difficulty, high maintenance cost and frequent replacement of the gas engine, the applicant tries to replace the integrated burner with a blower and a burner, which have high maintenance difficulty and high maintenance cost. However, the applicant finds that the temperature of the sand core surface drying furnace cannot be accurately controlled by directly installing the burner in the combustion chamber in actual operation, so that the actual temperature of the sand core surface drying furnace always floats near the maximum error (the error is +/-5 ℃), the temperature control effect is poor, and the drying effect of the sand core is further affected. Therefore, how to design an adjustable combustion system which can replace the existing combustion machine and realize accurate temperature control is a difficult problem to be solved in the casting industry.
Disclosure of Invention
The utility model aims to provide an adjustable continuous combustion system for a sand core surface drying furnace, which not only completely replaces a common burner used by the existing foundry, reduces the later maintenance cost of the foundry, but also realizes the accurate control of the temperature in the surface drying furnace by accurately controlling the ventilation of natural gas.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model relates to an adjustable continuous combustion system for a sand core surface drying furnace, which comprises a combustion chamber arranged outside the sand core drying furnace, a burner fixed in the combustion chamber, a natural gas conveying pipeline and an air supply pipeline, wherein the natural gas conveying pipeline and the air supply pipeline are connected with the burner;
one end of the natural gas conveying pipeline is connected with a natural gas interface of the burner and the other end of the natural gas conveying pipeline is connected with a gas source, a manual control valve, an electromagnetic valve and a proportional valve are sequentially arranged on the natural gas conveying pipeline from the gas source to the burner, and a pressure interface of the proportional valve is connected with an air supply pipeline between the first control valve and the second control valve.
In the scheme, the burner is arranged in the combustion chamber of the sand core surface drying furnace, and the natural gas is combusted in the combustion chamber through the air supply pipeline and the natural gas pipeline which are arranged outside the combustion chamber, so that the structure is simple, the requirement on the use environment is low, no intentional requirement is made on the pressure of the combustion chamber, the maintenance is simple, the existing combustion machine matched with the sand core surface drying furnace can be completely replaced, the maintenance difficulty is reduced, and the maintenance cost is reduced;
according to the utility model, the air supply flow detected by the proportional valve can accurately regulate the air supply quantity and the natural gas quantity, so that the error of the sand core surface drying furnace can be controlled to be +/-0.5 ℃, and the natural gas consumption is greatly saved. Through the test of foundry manufacturers, the air consumption of the adjustable combustion system is only 72% of that of a burner, the energy conservation is remarkable (80640 cubic natural gas can be saved per year for each sand core drying furnace), the operation cost of the sand core surface drying furnace is reduced, and the adjustable combustion system is low-carbon and environment-friendly.
In a preferred embodiment of the present utility model, the first control valve is an electric control valve, and the second control valve is a manual butterfly valve; the manual control valve is a ball valve. When the automatic sand core surface drying furnace is actually installed, the electromagnetic valve and the electric regulating valve are connected into an own electric control system of the sand core surface drying furnace, so that the automatic regulation of the air supply quantity is realized.
More preferably, a connection interface is arranged on the air supply pipeline between the first control valve and the second control valve, and the distance between the connection interface and the first control valve is equal to 3-8 times of the pipe diameter of the air supply pipeline. More preferably, the distance between the connecting interface and the first control valve is equal to 5 times of the pipe diameter of the air supply pipeline.
Compared with the prior art, the utility model has the advantages that:
according to the utility model, the burner is arranged in the combustion chamber of the sand core surface drying furnace, and the air supply pipeline and the natural gas pipeline are arranged outside the combustion chamber to realize the combustion of natural gas in the combustion chamber, so that the pipeline is simple, the requirement on the use environment is low, no intentional requirement on the pressure of the combustion chamber is caused, the maintenance is simple, the existing combustion machine matched with the sand core surface drying furnace can be completely replaced, the maintenance difficulty is reduced, and the maintenance cost is reduced.
The utility model accurately adjusts the air supply quantity and the natural gas quantity through the air supply flow detected by the proportional valve, not only can control the error of the sand core surface drying furnace to +/-0.5 ℃, but also greatly saves the natural gasAmount of the components. Through the test of foundry manufacturers, the gas consumption of the utility model is only 72% of that of the burner, and the energy conservation is remarkable. Each sand core drying furnace can save 80640 cubic natural gas every year by running for 24 hours per day and 300 hours per year. In unit price of 4 yuan/m 3 And each sand core drying furnace can save 32 ten thousand yuan, greatly reduce the operation cost of the sand core surface drying furnace, and is low-carbon and environment-friendly.
Drawings
Fig. 1 is a schematic structural view of the present utility model.
Fig. 2 is an enlarged view of fig. 1 (omitting the sand core surface drying oven).
Detailed Description
The following describes embodiments of the present utility model in detail with reference to the accompanying drawings, and the embodiments and specific operation procedures are given by the embodiments of the present utility model under the premise of the technical solution of the present utility model, but the scope of protection of the present utility model is not limited to the following embodiments.
It should be noted that in the description of the present utility model, relational terms such as "first" and "second", and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.
In the description of the present utility model, the terms "mounted," "connected," "coupled," and "connected," as may be used broadly, and may be connected, for example, fixedly, detachably, or integrally, unless otherwise specifically defined and limited; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those skilled in the art in specific cases.
As shown in fig. 1-2, the adjustable continuous combustion system for the sand core surface drying furnace comprises a combustion chamber 2, a burner 3, a natural gas conveying pipeline 4 and an air supply pipeline 5, wherein the combustion chamber 2 is connected with the sand core drying furnace 1, the burner 3 is arranged at the middle position of the side wall of the combustion chamber 2, and the natural gas conveying pipeline 4 and the air supply pipeline 5 are connected with the burner 3; the burner 3 (model number SECM 140) is provided with a combustion air interface, a natural gas interface and a flame interface, wherein the flame interface of the burner 3 is positioned in the combustion chamber 2, and the combustion air interface and the natural gas interface are positioned outside the combustion chamber 2;
one end of the air supply pipeline 5 is connected with a combustion air port of the burner 3, the other end of the air supply pipeline is connected with a blower 6, and a first control valve and a second control valve are arranged on the air supply pipeline 5 at intervals; in actual installation, the first control valve is an electric control valve F1 (such as a control valve with the model of SAM 2-60/I+SKA65), and the second control valve is a manual butterfly valve F2 (in a normally open state in the running process);
one end of the natural gas conveying pipeline 4 is connected with a natural gas interface of the burner 3, the other end of the natural gas conveying pipeline is connected with a natural gas source, and a manual control valve (preferably a manual ball valve F3), an electromagnetic valve F4 and a proportional valve F5 (preferably a pressure proportional valve) are sequentially arranged on the natural gas conveying pipeline 4;
the air supply pipeline 5 between the electric regulating valve F1 and the manual butterfly valve F2 is provided with a connecting interface, the distance between the connecting interface and the electric regulating valve F1 is equal to 5 times of the pipe diameter of the air supply pipeline, and when the electric butterfly valve is actually installed, the pressure interfaces of the air supply pipeline 5 and the proportional valve F5 are connected together through a hose.
In order to realize automatic combustion, the electric control regulating valve and the electromagnetic valve are connected to an electric control system of the sand core surface drying furnace, the electric control system controls the opening of the electric control regulating valve F1 according to the temperature detected by the temperature sensor in the sand core surface drying furnace, and the proportional valve F5 automatically regulates the opening according to the opening of the electric control regulating valve F1, so that combustion air and natural gas always keep the optimal combustion ratio, the temperature can be controlled to be +/-0.5 ℃, and the natural gas consumption is greatly saved.
Before operation, opening a manual butterfly valve F2 on the air supply pipeline 5, and a manual ball valve F3 and a solenoid valve F4 on the natural gas conveying pipeline 4; the blower 4 is started, the blower 4 supplies combustion air to the burner through the air supply pipeline, the electric regulating valve F1 and the proportional valve F5 are both in the minimum opening position, then ignition is carried out, and natural gas is fully combusted under the action of the combustion air.
In the operation process, the proportional valve on the natural gas conveying pipeline 4 can automatically adjust the opening according to the opening of the electric control regulating valve F1. When the temperature needs to be raised, the electric control regulating valve F1 is continuously opened, and the proportional valve F5 is automatically opened according to the opening degree of the electric control regulating valve F1, so that the combustion proportion and the combustion sufficiency of the natural gas and the combustion air are ensured, and the uniform temperature rise of the sand core surface drying furnace 1 is realized; when the temperature needs to be reduced, the opening of the electric control regulating valve F1 is gradually reduced, and at the moment, the proportional valve F5 automatically reduces according to the opening of the electric control regulating valve F1, so that combustion heat is reduced, and uniform temperature reduction of the sand core surface drying furnace 1 is realized;
when the constant temperature is required to be maintained, the electric control regulating valve F1 can automatically regulate the opening according to the actual temperature in the sand core surface drying furnace 1, and the proportional valve F5 automatically regulates according to the opening of the electric control regulating valve F1, so that the temperature of the sand core surface drying furnace 1 is controlled to be +/-0.5 ℃, and the accurate temperature control of the sand core surface drying furnace is realized.
According to the utility model, the air supply flow detected by the proportional valve can accurately regulate the air supply quantity and the natural gas quantity, so that the error of the sand core surface drying furnace can be controlled to be +/-0.5 ℃, and the natural gas consumption is greatly saved. Through the test of foundry manufacturers, the gas consumption of the utility model is only 72% of that of the burner, and the energy conservation is remarkable. Each sand core drying furnace can save 80640 cubic natural gas every year by running for 24 hours per day and 300 hours per year. In unit price of 4 yuan/m 3 And each sand core drying furnace can save 32 ten thousand yuan, greatly reduce the operation cost of the sand core surface drying furnace, and is low-carbon and environment-friendly.
It should be emphasized that the above description is only a preferred embodiment of the present utility model, and the present utility model is not limited to the above-described embodiment, but may be modified without inventive effort or equivalent replacement of some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (3)

1. An adjustable continuous combustion system for a sand core surface drying furnace, comprises a combustion chamber arranged outside the sand core drying furnace, and is characterized in that: the burner is fixed in the combustion chamber, a natural gas conveying pipeline and an air supply pipeline are connected with the burner, one end of the air supply pipeline is connected with a combustion-supporting air interface of the burner, the other end of the air supply pipeline is connected with a blower, and a first control valve and a second control valve are arranged on the air supply pipeline at intervals;
one end of the natural gas conveying pipeline is connected with a natural gas interface of the burner and the other end of the natural gas conveying pipeline is connected with a gas source, a manual control valve, an electromagnetic valve and a proportional valve are sequentially arranged on the natural gas conveying pipeline from the gas source to the burner, and a pressure interface of the proportional valve is connected with an air supply pipeline between the first control valve and the second control valve.
2. The regulated continuous combustion system for a sand core surface drying furnace of claim 1, wherein: the first control valve is an electric regulating valve, and the second control valve is a manual butterfly valve; the manual control valve is a manual ball valve.
3. The regulated continuous combustion system for a sand core surface drying furnace of claim 1, wherein: the air supply pipeline between the first control valve and the second control valve is provided with a connecting interface, and the distance between the connecting interface and the first control valve is equal to 3-8 times of the pipe diameter of the air supply pipeline.
CN202223411096.XU 2022-12-20 2022-12-20 Adjustable continuous combustion system for sand core surface drying furnace Active CN219607526U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202223411096.XU CN219607526U (en) 2022-12-20 2022-12-20 Adjustable continuous combustion system for sand core surface drying furnace

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202223411096.XU CN219607526U (en) 2022-12-20 2022-12-20 Adjustable continuous combustion system for sand core surface drying furnace

Publications (1)

Publication Number Publication Date
CN219607526U true CN219607526U (en) 2023-08-29

Family

ID=87742754

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202223411096.XU Active CN219607526U (en) 2022-12-20 2022-12-20 Adjustable continuous combustion system for sand core surface drying furnace

Country Status (1)

Country Link
CN (1) CN219607526U (en)

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