WO2021143196A1 - 金属模具预热喷火枪装置 - Google Patents

金属模具预热喷火枪装置 Download PDF

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Publication number
WO2021143196A1
WO2021143196A1 PCT/CN2020/117273 CN2020117273W WO2021143196A1 WO 2021143196 A1 WO2021143196 A1 WO 2021143196A1 CN 2020117273 W CN2020117273 W CN 2020117273W WO 2021143196 A1 WO2021143196 A1 WO 2021143196A1
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WIPO (PCT)
Prior art keywords
combustion
metal mold
pipe
natural gas
pressure air
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PCT/CN2020/117273
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English (en)
French (fr)
Inventor
王盼
董磊
韩瑞雷
任小龙
冯波
陈聪猛
王飞
任肖炜
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温州瑞明工业股份有限公司
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Publication of WO2021143196A1 publication Critical patent/WO2021143196A1/zh

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/06—Permanent moulds for shaped castings
    • B22C9/065—Cooling or heating equipment for moulds
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/38—Torches, e.g. for brazing or heating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46—Details, e.g. noise reduction means
    • F23D14/48—Nozzles
    • F23D14/52—Nozzles for torches; for blow-pipes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46—Details, e.g. noise reduction means
    • F23D14/48—Nozzles
    • F23D14/58—Nozzles characterised by the shape or arrangement of the outlet or outlets from the nozzle, e.g. of annular configuration
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46—Details, e.g. noise reduction means
    • F23D14/60—Devices for simultaneous control of gas and combustion air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2203/00—Gaseous fuel burners
    • F23D2203/007—Mixing tubes, air supply regulation

Definitions

  • the invention relates to a flame spray gun, in particular to a metal mold preheating flame spray gun device.
  • Metal molds are an indispensable and important part of the production of the foundry industry. In the process of casting production, metal molds must first be heated to reach the required process temperature before production; achieving rapid and uniform preheating of metal molds is a major part of technical production. Difficulty, common use of electric heating tube heating, kerosene heating, gas heating and other methods, but they all have uneven mold preheating, short mold life, and product defects; long preheating cycle and low production efficiency; preheating energy consumption High production costs, high production costs; diversified metal mold structures, different sizes, small application range of mold torch, or black carbon deposits in the cavity after the metal mold is preheated, and many problems such as the cleanliness that cannot meet the production requirements.
  • the purpose of the present invention is to overcome the above-mentioned shortcomings and provide a metal mold preheating torch device with sufficient fuel combustion, multi-point spraying, and uniform heating of the mold.
  • a metal mold preheating torch device includes a combustion tube, the combustion tube is of a ring structure, one end of the combustion tube is connected to a fuel mixing nozzle, and the other end of the combustion tube is connected to a support frame;
  • the ends of the fuel mixing nozzle are respectively connected with a natural gas pipe joint and a low-pressure air pipe joint, and the annular combustion pipe is provided with a plurality of combustion holes.
  • a natural gas regulating valve is installed on the fuel mixing connection pipe and on the side of the natural gas pipe joint, and a low pressure air regulating valve is installed on the fuel mixing connection pipe and on the side of the low pressure air pipe connection.
  • the positions of the combustion holes are divided into a hole position A group and a hole position B group, and the hole positions of the hole position A group and the hole position B group are arranged in a staggered manner.
  • the ends of the fuel mixing pipe are connected to the natural gas pipe joint and the low-pressure air pipe joint, so that the natural gas and low-pressure air are mixed into the combustion pipe to be fully burned, and the natural gas regulating valve and the low-pressure air regulating valve are set to adjust separately
  • the mixing ratio of natural gas and low-pressure air can control the size of the combustion flame and improve the efficiency of gas combustion.
  • the positions of the combustion holes are arranged in a staggered manner, and the multi-point and multi-directional flame spraying method can make the metal mold more uniform during the heating process, and extend the service life of the metal mold. Its simple structure is widely used, fully improves energy efficiency, and greatly improves production efficiency.
  • Figure 1 is a schematic diagram of the installation application structure of the present invention.
  • Fig. 2 is an enlarged schematic cross-sectional view of the mark F in Fig. 1.
  • Fig. 3 is a schematic diagram of the hole position setting of the combustion hole in Fig. 2 (hole position group A).
  • Figure 4 is a schematic diagram of the hole position setting of the combustion holes in Figure 2 (hole position group B).
  • the metal mold preheating torch device of the present invention includes a combustion tube 5 (made of stainless steel heat-resistant round tube).
  • the combustion tube 5 has a ring structure.
  • One end of the combustion tube 5 is connected to a fuel mixing nozzle 8.
  • the other end is connected to the support frame 7 (used to fix the torch device in the heating cavity of the metal mold 9); the ends of the fuel mixing nozzle 8 are respectively connected to the natural gas pipe joint 1 (communicating with natural gas), low pressure
  • the air pipe joint 2 communicateicating with low-pressure air
  • the annular combustion pipe 5 is provided with a number of combustion holes 6 (diameter about 5 mm).
  • a natural gas regulating valve 3 is installed on the fuel mixing nozzle 8 and on the side of the natural gas pipe joint 1, and low pressure air is installed on the fuel mixing nozzle 8 and on the side of the low pressure air pipe joint 2.
  • Adjusting valve 4 is used to adjust the mixing ratio of natural gas and low pressure air, control the size of the combustion flame, and improve the efficiency of gas combustion.
  • the mixing ratio of natural gas and low-pressure air is 1:3 (when the natural gas pressure is 0.08mpa and the low-pressure air is 0.3mpa)
  • the color of the flame sprayed is orange-red with light blue, indicating that the fuel is fully burned.
  • the positions of the combustion holes 6 can be divided into a hole position A group and a hole position B group.
  • the hole positions of the hole position A group and the hole position B group are mutually misaligned.
  • the hole position A group and the hole position B group each have three holes (A-1, A-2, A-3 and B-1, B-2, B-3), between the holes
  • the angles are respectively 90° and 60°, which are mutually spaced and misaligned (that is, the angle between the holes A-1 and A-2, B-1 and B-2 of the hole position A group or the hole position B group is 90°, The angle between the holes A-2 and A-3, B-2 and B-3 is 60°), and the multi-point and multi-directional flame spraying method can heat the metal mold more evenly during the heating process.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)

Abstract

本发明公开了一种金属模具预热喷火枪装置，其燃烧管（5）为环形结构，该燃烧管的一端连接燃料混合接管（8）、其另一端连接支撑架（7）；所述燃料混合接管的端部分别连接天然气管接头（1）、低压空气管接头（2），所述环形燃烧管上设有若干燃烧孔（6）。在所述燃料混合接管上、并在天然气管接头的侧边处装有天然气调节阀（3），在所述燃料混合接管上、并在低压空气管接头的侧边处装有低压空气调节阀（4）。所述燃烧孔的孔位互为错位布设。本发明能使天然气和低压空气混合进入燃烧管充分燃烧，提高燃气燃烧效率。燃烧孔的孔位互为错位布设，多点多方向喷火方式能将金属模具在加热过程中会更加均匀，延长了金属模具的使用寿命。其结构简单应用广泛，充分提高能源利用率，大幅提升生产效率。

Description

金属模具预热喷火枪装置 技术领域
本发明涉及一种喷火枪，具体是涉及一种金属模具预热喷火枪装置。
 背景技术
金属模具是铸造行业生产不可或缺的重要组成部分，而金属模具在铸造生产过程中都必须先加热模具，到达要求的工艺温度，再进行生产；实现金属模具快速均匀预热是技术生产一大难点，常见采用电热管加热、燃烧煤油加热、煤气加热等多种方式，但都存在模具预热不均、模具寿命短，产品易出现缺陷；预热周期长，生产效率低；预热能耗高，生产成本居高不下；金属模具结构多样化、尺寸不一，模具喷火枪适用范围小或金属模具预热后型腔发黑积碳，清洁度无法满足生产要求等诸多问题。
 技术问题
本发明的目的在于克服上述的不足，而提供一种燃料燃烧充分、采用多点喷火、模具受热均匀的金属模具预热喷火枪装置。
 技术解决方案
本发明的目的通过如下技术方案来实现：金属模具预热喷火枪装置，包括燃烧管，所述燃烧管为环形结构，该燃烧管的一端连接燃料混合接管、其另一端连接支撑架；所述燃料混合接管的端部分别连接天然气管接头、低压空气管接头，所述环形燃烧管上设有若干燃烧孔。
在所述燃料混合接管上、并在天然气管接头的侧边处装有天然气调节阀，在所述燃料混合接管上、并在低压空气管接头的侧边处装有低压空气调节阀。
所述燃烧孔的位置分为孔位A组与孔位B组，所述该孔位A组、孔位B组的孔位互为错位布设。
 有益效果
采用发明后，由于燃料混合接管的端部分别连接天然气管接头、低压空气管接头而使天然气和低压空气混合进入燃烧管充分燃烧，且天然气调节阀、低压空气调节阀的设置，用来分别调节天然气和低压空气的气量混合比例，控制燃烧火焰大小，提高燃气燃烧效率。燃烧孔的孔位互为错位布设，多点多方向喷火方式能将金属模具在加热过程中会更加均匀，延长了金属模具的使用寿命。其结构简单应用广泛，充分提高能源利用率，大幅提升生产效率。
 附图说明
图1为本发明的安装应用结构示意图。
图2为图1中的标记F的剖视放大示意图。
图3为图2中燃烧孔的孔位设置示意图（孔位A组）。
图4为图2中燃烧孔的孔位设置示意图（孔位B组）。
 本发明的实施方式
参照图1可知，本发明金属模具预热喷火枪装置，包括燃烧管5（采用不锈钢耐热圆管制作），所述燃烧管5为环形结构，该燃烧管5的一端连接燃料混合接管8、其另一端连接支撑架7（用于将此喷火枪装置固定在金属模具9的需加热型腔内）；所述燃料混合接管8的端部分别连接天然气管接头1（与天然气相通）、低压空气管接头2（与低压空气相通），所述环形燃烧管5上设有若干燃烧孔6（直径约为5mm）。在所述燃料混合接管8上、并在天然气管接头1的侧边处装有天然气调节阀3，在所述燃料混合接管8上、并在低压空气管接头2的侧边处装有低压空气调节阀4，用来调节天然气和低压空气的气量混合比例，控制燃烧火焰大小，提高燃气燃烧效率。当天然气与低压空气混合比例为1:3时（天然气压力0.08mpa、低压空气为0.3mpa情况下），喷出的火焰颜色为橘红色带淡蓝色，表示燃料充分燃烧。
如图2、图3、图4所示，所述燃烧孔6的位置可分为孔位A组与孔位B组，所述该孔位A组、孔位B组的孔位互为错位布设；所述孔位A组、孔位B组又各有三个孔位（A-1、A-2、A-3与B-1、B-2、B-3），其孔位之间角度分别为90°与60°互为间隔错位布设（即孔位A组或孔位B组的孔位A-1与A-2、B-1与B-2之间的角度为90°，其孔位A-2与A-3、B-2与B-3之间角度为60°），其多点多方向喷火方式能将金属模具在加热过程中会更加均匀受热。

Claims (4)

  1. 金属模具预热喷火枪装置，包括燃烧管（5），其特征在于：所述燃烧管（5）为环形结构，该燃烧管（5）的一端连接燃料混合接管（8）、其另一端连接支撑架（7）；所述燃料混合接管（8）的端部分别连接天然气管接头（1）、低压空气管接头（2），所述环形燃烧管（5）上设有若干燃烧孔（6）。
  2. 根据权利要求1所述的金属模具预热喷火枪装置，其特征在于：在所述燃料混合接管（8）上、并在天然气管接头（1）的侧边处装有天然气调节阀（3），在所述燃料混合接管（8）上、并在低压空气管接头（2）的侧边处装有低压空气调节阀（4）。
  3. 根据权利要求1或2所述的金属模具预热喷火枪装置，其特征在于：所述燃烧孔（6）的位置分为孔位A组与孔位B组，所述该孔位A组、孔位B组的孔位互为错位布设。
  4. 根据权利要求3所述的金属模具预热喷火枪装置，其特征在于：所述孔位A组、孔位B组又各有三个孔位，其孔位之间角度分别为90°与60°互为间隔错位布设。
PCT/CN2020/117273 2020-01-18 2020-09-24 金属模具预热喷火枪装置 WO2021143196A1 (zh)

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Publication number Priority date Publication date Assignee Title
CN111189046A (zh) * 2020-01-18 2020-05-22 温州瑞明工业股份有限公司 金属模具预热喷火枪装置

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Publication number Priority date Publication date Assignee Title
JPH07185715A (ja) * 1993-12-28 1995-07-25 Showa:Kk 金型予熱装置
CN102642014A (zh) * 2011-02-21 2012-08-22 远轻铝业（中国）有限公司 铸造金属模具加热装置
CN103111607A (zh) * 2012-12-31 2013-05-22 温州瑞明工业股份有限公司 金属模具预热装置及其金属模具预热工艺
CN103706779A (zh) * 2013-12-27 2014-04-09 广东鸿特精密技术股份有限公司 铝合金重力铸造燃气加热分段控制模具温度的方法及装置
CN203610652U (zh) * 2013-12-26 2014-05-28 湖北航特装备制造股份有限公司 一种用于金属型重力铸造模具的燃气加热装置
CN111189046A (zh) * 2020-01-18 2020-05-22 温州瑞明工业股份有限公司 金属模具预热喷火枪装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07185715A (ja) * 1993-12-28 1995-07-25 Showa:Kk 金型予熱装置
CN102642014A (zh) * 2011-02-21 2012-08-22 远轻铝业（中国）有限公司 铸造金属模具加热装置
CN103111607A (zh) * 2012-12-31 2013-05-22 温州瑞明工业股份有限公司 金属模具预热装置及其金属模具预热工艺
CN203610652U (zh) * 2013-12-26 2014-05-28 湖北航特装备制造股份有限公司 一种用于金属型重力铸造模具的燃气加热装置
CN103706779A (zh) * 2013-12-27 2014-04-09 广东鸿特精密技术股份有限公司 铝合金重力铸造燃气加热分段控制模具温度的方法及装置
CN111189046A (zh) * 2020-01-18 2020-05-22 温州瑞明工业股份有限公司 金属模具预热喷火枪装置

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