CN2874204Y - Gas pressure reducer - Google Patents
Gas pressure reducer Download PDFInfo
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- CN2874204Y CN2874204Y CN200520200893.0U CN200520200893U CN2874204Y CN 2874204 Y CN2874204 Y CN 2874204Y CN 200520200893 U CN200520200893 U CN 200520200893U CN 2874204 Y CN2874204 Y CN 2874204Y
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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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
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Abstract
本实用新型公开了一种气体减压装置，它的低压气体出口的出口截面积与高压气体进口的进口截面积之比大于或等于200倍，在高压气体进口(2)和低压气体出口之间设有阀口，在阀口上设有能够关闭或开启阀口的阀杆，在阀杆上连接有一个安装在减压阀体上的压力平衡膜片，在平衡膜片上设有支撑板，在减压阀体上设有出口压力调节螺钉，在支撑板与出口压力调节螺钉之间设有力平衡弹簧。本实用新型不仅具有结构简单、体积较小、操作调整方便、工作性能可靠的优点，而且还具有使用安全、维修容易的优点。本实用新型特别适合用于天然气汽车的燃料供给系统中适用。
The utility model discloses a gas decompression device, the ratio of the outlet cross-sectional area of the low-pressure gas outlet to the inlet cross-sectional area of the high-pressure gas inlet is greater than or equal to 200 times, between the high-pressure gas inlet (2) and the low-pressure gas outlet A valve port is provided, and a valve stem that can close or open the valve port is provided on the valve port. A pressure balance diaphragm installed on the pressure reducing valve body is connected to the valve stem, and a support plate is provided on the balance diaphragm. An outlet pressure adjustment screw is arranged on the pressure reducing valve body, and a force balance spring is arranged between the support plate and the outlet pressure adjustment screw. The utility model not only has the advantages of simple structure, small volume, convenient operation and adjustment, and reliable working performance, but also has the advantages of safe use and easy maintenance. The utility model is particularly suitable for the fuel supply system of natural gas vehicles.
Description
技术领域：Technical field:
本实用新型涉及一种用于空气、氧气、氮气或压缩天然气(CNG)减压的气体减压装置，特别是一种用于天然气汽车的燃料供给系统中的气体减压装置。The utility model relates to a gas decompression device used for decompression of air, oxygen, nitrogen or compressed natural gas (CNG), in particular to a gas decompression device used in a fuel supply system of a natural gas vehicle.
背景技术：Background technique:
目前我国车用压缩天然气(CNG)的气体减压装置主要采取两级或三级减压的方式将20MPa压力的天然气降低到0～0.4MPa，这些气体减压装置主要存在着体积大、结构复杂、流量小、低压气出口压力难于调节控制的缺点，并且很难满足0.4～1.2Mpa的使用要求。因此现有的气体减压装置在使用时，其使用效果还是不够理想。At present, the gas decompression devices of compressed natural gas (CNG) for vehicles in my country mainly adopt two-stage or three-stage decompression methods to reduce the natural gas with a pressure of 20 MPa to 0-0.4 MPa. These gas decompression devices mainly have large volume and complex structure. , small flow rate, low-pressure gas outlet pressure is difficult to adjust and control, and it is difficult to meet the use requirements of 0.4-1.2Mpa. Therefore when existing gas decompression device is in use, its use effect is still not ideal enough.
发明内容：Invention content:
本实用新型的目的是：提供一种结构简单、体积较小、操作方便、工作性能可靠的气体减压装置，以克服现有技术的不足。The purpose of this utility model is to provide a gas decompression device with simple structure, small volume, convenient operation and reliable working performance, so as to overcome the deficiencies of the prior art.
本实用新型是这样实现的：它包括设有高压气体进口(2)和低压气体出口(3)的减压阀体(1)，低压气体出口(3)的出口截面积与高压气体进口(2)的进口截面积之比大于或等于200倍，在高压气体进口(2)和低压气体出口(3)之间设有阀口(4)，在阀口(4)上设有能够关闭或开启阀口(4)的阀杆(5)，在阀杆(5)上连接有一个安装在减压阀体(1)上的压力平衡膜片(6)，在平衡膜片(6)上设有支撑板(7)，在减压阀体(1)上设有出口压力调节螺钉(8)，在支撑板(7)与出口压力调节螺钉(8)之间设有力平衡弹簧(9)。The utility model is achieved in that it comprises a pressure reducing valve body (1) that is provided with a high-pressure gas inlet (2) and a low-pressure gas outlet (3), and the outlet cross-sectional area of the low-pressure gas outlet (3) is the same as that of the high-pressure gas inlet (2). ) is greater than or equal to 200 times the ratio of the inlet cross-sectional area, a valve port (4) is provided between the high-pressure gas inlet (2) and the low-pressure gas outlet (3), and there is a valve port (4) that can be closed or opened. The valve stem (5) of the valve port (4) is connected with a pressure balance diaphragm (6) installed on the pressure reducing valve body (1) on the valve stem (5). There is a support plate (7), an outlet pressure adjustment screw (8) is arranged on the pressure reducing valve body (1), and a force balance spring (9) is arranged between the support plate (7) and the outlet pressure adjustment screw (8).
在减压阀体(1)内靠近低压气体出口(3)的位置处设有能够循环热水的热水容腔(10)，并且在减压阀体(1)上设有与热水容腔(10)相通的进水口和出水口。A hot water chamber (10) capable of circulating hot water is provided in the pressure reducing valve body (1) near the low-pressure gas outlet (3), and a hot water chamber (10) is provided on the pressure reducing valve body (1). A water inlet and a water outlet that the chamber (10) communicates with.
在减压阀体(1)上安装有与低压气体出口(3)相通的安全阀(11)。A safety valve (11) communicated with the low-pressure gas outlet (3) is installed on the pressure reducing valve body (1).
高压气体进口(2)的进口截面积为0.15cm2～0.22cm2，低压气体出口(3)的出口截面积为大于或等于45cm2。The inlet sectional area of the high-pressure gas inlet (2) is 0.15cm 2 -0.22cm 2 , and the outlet sectional area of the low-pressure gas outlet (3) is greater than or equal to 45cm 2 .
阀杆(5)通过联结块(12)与压力平衡膜片(6)连接。The valve stem (5) is connected with the pressure balance diaphragm (6) through a coupling block (12).
压力平衡膜片(6)为高弹性橡胶与高强度抗拉纤维夹层复合的膜片。The pressure balance diaphragm (6) is a diaphragm composed of high-elastic rubber and high-strength tensile fiber interlayer.
由于采用了上述技术方案，本实用新型通过力平衡弹簧、压力平衡膜片以及在膜片上的支撑板，并通过用联结块和阀杆相关联的结构，这样综合利用力的平衡以及在相同气体流量下，流通面积越大，气体压力越低的原理，使本实用新型能通过一级减压就可以将压力降低致0.2～1.2MPa之间，并使其流量在0～70Kg/h之间进行调整，而且还可以通过调压螺钉对出口压力在0.2～1.2MPa之间任意调整，其出口压力的调整十分简单。由于气体在从很高的压力突然降低至很低的压力时，会吸收大量的热量，如果气体中含有水的话，很可能会在出口处造成水的凝固，形成“冰堵”，使减压装置不能正常使用，因此本实用新型专门在靠近低压气体出口的位置处设计了热水容腔，即在靠近减压区域处设计了一个“热水域”，这样可在车用天然气减压系统的实际使用中，巧妙地用发动机的冷却循环水来加热减压装置的减压区域，使得“冰堵”问题能够很好地解决。另外，本实用新型的减压装置上设置有安全阀，当减压装置出现故障，例如主阀关闭不严，出口没有流量(如减压后的气体没有使用，被封闭在一个固定容积的空间内)时，出口的减压压力会不断上升，直到升至与进口压力平衡，这个时候如果在车用CNG系统中使用，会损坏发动机，甚至发生爆炸的危险。因此，在该减压装置的设计中，考虑了这个问题，并设计了一个安全阀，这个安全阀的开启压力可以根据不同的使用要求，设计不同刚性系数的弹簧。这样，如果出现上述问题，安全阀会在出口超过设计的安全压力时开启卸放压力，并发出响声，以在一定程度上保证使用安全。Due to the adoption of the above-mentioned technical scheme, the utility model uses the force balance spring, the pressure balance diaphragm and the support plate on the diaphragm, and through the structure associated with the coupling block and the valve stem, so that the comprehensive utilization of force balance and the same Under the gas flow rate, the larger the flow area, the lower the gas pressure, so that the utility model can reduce the pressure to 0.2-1.2MPa through one-stage decompression, and make the flow rate between 0-70Kg/h It can be adjusted at any time, and the outlet pressure can be adjusted arbitrarily between 0.2 and 1.2MPa through the pressure adjusting screw. The adjustment of the outlet pressure is very simple. Because the gas will absorb a lot of heat when it suddenly drops from a very high pressure to a very low pressure, if the gas contains water, it is likely to cause water to freeze at the outlet, forming an "ice block", making the decompression The device cannot be used normally, so this utility model specially designs a hot water chamber near the low-pressure gas outlet, that is, a "hot water area" is designed near the decompression area, so that it can be used in the vehicle natural gas decompression system. In actual use, the cooling circulating water of the engine is cleverly used to heat the decompression area of the decompression device, so that the problem of "ice blockage" can be well solved. In addition, the decompression device of the present utility model is provided with a safety valve. When the decompression device fails, for example, the main valve is not closed tightly, and there is no flow at the outlet (such as the decompressed gas is not used, it is enclosed in a fixed volume space) When it is inside), the decompression pressure at the outlet will continue to rise until it reaches a balance with the inlet pressure. If it is used in a CNG system for a vehicle at this time, it will damage the engine or even cause an explosion. Therefore, in the design of the decompression device, this problem is considered, and a safety valve is designed. The opening pressure of the safety valve can be designed with springs of different rigidity coefficients according to different usage requirements. In this way, if the above problems occur, the safety valve will open to release the pressure when the outlet exceeds the designed safety pressure, and make a sound to ensure the safety of use to a certain extent.
因此，本实用新型与现有技术相比，本实用新型不仅具有结构简单、体积较小、操作调整方便、工作性能可靠的优点，而且还具有使用安全、维修容易的优点。本实用新型特别适合用于天然气汽车的燃料供给系统中适用。Therefore, compared with the prior art, the utility model not only has the advantages of simple structure, small volume, convenient operation and adjustment, and reliable working performance, but also has the advantages of safe use and easy maintenance. The utility model is particularly suitable for the fuel supply system of natural gas vehicles.
附图说明：Description of drawings:
附图1为本实用新型的结构示意图；Accompanying drawing 1 is the structural representation of the utility model;
附图2为本实用新型安装有安全阀的结构示意图。Accompanying drawing 2 is the structure schematic diagram that safety valve is installed in the utility model.
具体实施方式：Detailed ways:
本实用新型的实施例：设有高压气体进口(2)和低压气体出口(3)的减压阀体(1)可采用金属或塑料材料制作，制作时，将低压气体出口(3)的出口截面积与高压气体进口(2)的进口截面积之比制作成大于或等于200倍，最好将高压气体进口(2)的进口截面积制作成能在0.15cm2～0.22cm2之间可调，将低压气体出口(3)的出口截面积制作成大于或等于45cm2；然后在高压气体进口(2)和低压气体出口(3)之间制作出阀口(4)，在阀口(4)上安装一个能够关闭或开启阀口(4)的阀杆(5)，在阀杆(5)上连接上一个能够安装固定在减压阀体(1)上的压力平衡膜片(6)，并在平衡膜片(6)上安装一个支撑板(7)，然后在减压阀体(1)上安装一个出口压力调节螺钉(8)，在支撑板(7)与出口压力调节螺钉(8)之间安装一个力平衡弹簧(9)；为了使工作性能更加稳定，最好将阀杆(5)通过一个联结块(12)与压力平衡膜片(6)连接，并且其压力平衡膜片(6)最好采用市场上出售的用高弹性橡胶与高强度抗拉纤维夹层复合成的材料来制作膜片；为了防止本实用新型在工作时可能出现的“冰堵”现象，可在减压阀体(1)内靠近低压气体出口(3)的位置处制作一个能够存装循环热水的热水容腔(10)，并且在减压阀体(1)上制作一个能与热水容腔(10)相通的进水口和出水口，这样在使用时就能方便地将汽车的发动机冷却水管与其连接；为了在使用时更加安全可靠，可在减压阀体(1)上安装一个与低压气体出口(3)相通的安全阀(11)即成。Embodiment of the present utility model: the pressure reducing valve body (1) that is provided with high-pressure gas inlet (2) and low-pressure gas outlet (3) can adopt metal or plastic material to make, and when making, the outlet of low-pressure gas outlet (3) The ratio of the cross-sectional area to the cross-sectional area of the high-pressure gas inlet (2) is made greater than or equal to 200 times . adjust, the outlet cross-sectional area of the low-pressure gas outlet (3) is made greater than or equal to 45cm 4) Install a valve stem (5) that can close or open the valve port (4), and connect a pressure balance diaphragm (6) that can be installed and fixed on the pressure reducing valve body (1) on the valve stem (5). ), and install a support plate (7) on the balance diaphragm (6), then install an outlet pressure adjustment screw (8) on the pressure reducing valve body (1), and install the outlet pressure adjustment screw (8) on the support plate (7) and the outlet pressure adjustment screw A force balance spring (9) is installed between (8); in order to make the working performance more stable, it is better to connect the valve stem (5) with the pressure balance diaphragm (6) through a coupling block (12), and its pressure balance Diaphragm (6) preferably adopts the material that sells on the market to be compounded with high elastic rubber and high-strength tensile fiber interlayer to make diaphragm; Make a hot water chamber (10) capable of storing circulating hot water at a position close to the low-pressure gas outlet (3) in the pressure reducing valve body (1), and make a chamber (10) that can be connected with the pressure reducing valve body (1) The water inlet and water outlet of the hot water chamber (10) are connected, so that the engine cooling water pipe of the car can be easily connected with it during use; Install a safety valve (11) that communicates with the low-pressure gas outlet (3).
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Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200520200893.0U CN2874204Y (en) | 2005-12-29 | 2005-12-29 | Gas pressure reducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200520200893.0U CN2874204Y (en) | 2005-12-29 | 2005-12-29 | Gas pressure reducer |
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| Publication Number | Publication Date |
|---|---|
| CN2874204Y true CN2874204Y (en) | 2007-02-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200520200893.0U Expired - Fee Related CN2874204Y (en) | 2005-12-29 | 2005-12-29 | Gas pressure reducer |
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| CN (1) | CN2874204Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103994324A (en) * | 2014-05-09 | 2014-08-20 | 宁波市成大机械研究所 | High-pressure gas barrel capable of automatically deflating underwater |
-
2005
- 2005-12-29 CN CN200520200893.0U patent/CN2874204Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103994324A (en) * | 2014-05-09 | 2014-08-20 | 宁波市成大机械研究所 | High-pressure gas barrel capable of automatically deflating underwater |
| CN103994324B (en) * | 2014-05-09 | 2016-04-06 | 宁波市成大机械研究所 | Can in water the high pressure air bucket of automatic deflation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070228 Termination date: 20121229 |