WO2014205887A1 - 一种低温储液罐的浮球限充装置 - Google Patents

一种低温储液罐的浮球限充装置 Download PDF

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Publication number
WO2014205887A1
WO2014205887A1 PCT/CN2013/080534 CN2013080534W WO2014205887A1 WO 2014205887 A1 WO2014205887 A1 WO 2014205887A1 CN 2013080534 W CN2013080534 W CN 2013080534W WO 2014205887 A1 WO2014205887 A1 WO 2014205887A1
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WIPO (PCT)
Prior art keywords
storage tank
float
liquid
liquid storage
limiting device
Prior art date
Application number
PCT/CN2013/080534
Other languages
English (en)
French (fr)
Inventor
王五开
翟兰惠
王红霞
卫丽霞
张健
王春娟
潘晓娥
董明会
张会杰
尚成文
Original Assignee
石家庄安瑞科气体机械有限公司
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Publication date
Application filed by 石家庄安瑞科气体机械有限公司 filed Critical 石家庄安瑞科气体机械有限公司
Priority to US14/899,692 priority Critical patent/US9890906B2/en
Publication of WO2014205887A1 publication Critical patent/WO2014205887A1/zh

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/04—Arrangement or mounting of valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
    • F17C13/021—Special adaptations of indicating, measuring, or monitoring equipment having the height as the parameter
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/05—Size
    • F17C2201/056—Small (<1 m3)
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
    • F17C2203/0602—Wall structures; Special features thereof
    • F17C2203/0612—Wall structures
    • F17C2203/0626—Multiple walls
    • F17C2203/0629—Two walls
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0323—Valves
    • F17C2205/0335—Check-valves or non-return valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0382—Constructional details of valves, regulators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0388—Arrangement of valves, regulators, filters
    • F17C2205/0391—Arrangement of valves, regulators, filters inside the pressure vessel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/03—Mixtures
    • F17C2221/032—Hydrocarbons
    • F17C2221/033—Methane, e.g. natural gas, CNG, LNG, GNL, GNC, PLNG
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0146—Two-phase
    • F17C2223/0153—Liquefied gas, e.g. LPG, GPL
    • F17C2223/0161—Liquefied gas, e.g. LPG, GPL cryogenic, e.g. LNG, GNL, PLNG
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/03—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the pressure level
    • F17C2223/033—Small pressure, e.g. for liquefied gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2225/00—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel
    • F17C2225/01—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel characterised by the phase
    • F17C2225/0146—Two-phase
    • F17C2225/0153—Liquefied gas, e.g. LPG, GPL
    • F17C2225/0161—Liquefied gas, e.g. LPG, GPL cryogenic, e.g. LNG, GNL, PLNG
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2225/00—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel
    • F17C2225/04—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel characterised by other properties of handled fluid after transfer
    • F17C2225/042—Localisation of the filling point
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2225/00—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel
    • F17C2225/04—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel characterised by other properties of handled fluid after transfer
    • F17C2225/042—Localisation of the filling point
    • F17C2225/043—Localisation of the filling point in the gas
    • F17C2225/045—Localisation of the filling point in the gas with a dip tube
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/04—Indicating or measuring of parameters as input values
    • F17C2250/0404—Parameters indicated or measured
    • F17C2250/0408—Level of content in the vessel
    • F17C2250/0413—Level of content in the vessel with floats
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/04—Indicating or measuring of parameters as input values
    • F17C2250/0486—Indicating or measuring characterised by the location
    • F17C2250/0491—Parameters measured at or inside the vessel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/07—Actions triggered by measured parameters
    • F17C2250/072—Action when predefined value is reached
    • F17C2250/075—Action when predefined value is reached when full
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2260/00—Purposes of gas storage and gas handling
    • F17C2260/02—Improving properties related to fluid or fluid transfer
    • F17C2260/022—Avoiding overfilling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2270/00—Applications
    • F17C2270/01—Applications for fluid transport or storage
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2270/00—Applications
    • F17C2270/01—Applications for fluid transport or storage
    • F17C2270/0165—Applications for fluid transport or storage on the road
    • F17C2270/0168—Applications for fluid transport or storage on the road by vehicles

Definitions

  • the present invention relates to a charging device for a cryogenic liquid storage tank, which belongs to the field of cryogenic and atmospheric pressure liquefied gas storage and transportation, and in particular to a floating ball limiting device for a low temperature liquid storage tank.
  • Austenitic stainless steel has good toughness and strength properties under low temperature conditions, and
  • austenitic stainless steel also has the defect of low yield strength. According to GB150 pressure vessel standard, the material yield strength and tensile strength are used as the benchmark, respectively, divided by the corresponding safety book.
  • the full coefficient which is a small value to determine the allowable stress value of the material, often results in a low allowable stress value for the austenitic stainless steel material, and the material carrying capacity cannot be fully utilized. If the austenitic stainless steel material is made into a container for the storage tank without any treatment, the safety factor is very high, and correspondingly more stainless steel material is consumed, which not only increases the production cost but also increases the cost. The transportation cost and the reduction of the liquid storage space are extremely uneconomical, and the general manufacturer will not adopt this method.
  • the researchers have improved the yield strength of austenitic stainless steel materials through strain hardening, and the strain-strengthened tank not only reduces the safety factor, but also saves the cost of the production materials, and also makes the tank simultaneously.
  • a buffer tank structure is generally used in the tank liner to achieve this purpose, but the buffer tank has a cumbersome structure, poor accuracy, and can not effectively limit the charge when the non-empty tank is filled. Function; also use the float ball type charge valve to achieve the purpose of limiting charge.
  • a float valve is often used in daily life.
  • the patent publication [CN101561057A] discloses a float valve, a float ball is provided outside the valve, the float ball is connected to the internal valve through a lever, and the float is used in the liquid in the liquid.
  • the buoyancy in the ball reaches the purpose of opening and closing the valve.
  • This type of float valve is very unstable due to the float ball being placed outside the valve.
  • the valve assembly is prone to wear and tear.
  • the stability of the floating ball limiting valve is enhanced, but a new problem arises soon, because the filling pipe is fixed inside the tank, adding liquid
  • the diameter of the tube should not be too large, and the size of the float ball is limited, which often causes the float ball and the limit charge valve to fail, and the inner diameter of the float ball and the pipe body of the liquid pipe cannot closely fit, although the float ball is disposed inside the pipe, Still, the stability of the float ball cannot be guaranteed.
  • the limit charge valve fails, the cryogenic cryogenic liquid is infinitely filled in the tank body, causing the tank body to be overstressed and extremely prone to explosion.
  • the improved float limiting device although it is disposed in the filling tube, limits the floating ball to a certain extent, but since the floating ball cannot be made too large and the floating ball is not completely restricted, The floating ball limit valve in the tank transportation process is still very unstable, which seriously affects the safe transportation of the tank. And because the book float valve is not stable, resulting in an increase in the frequency of damage, although only a small part of the charge-retaining valve is damaged, it is impossible to replace or repair the tank re-opening, resulting in a float Once the limit valve is damaged, it means the result of the tank being scrapped. Therefore, in order to prolong the life of the storage tank, how to ensure the stability of the charging device becomes a major problem for those skilled in the art.
  • the present invention solves the technical problem that the structure of the existing floating ball limiting device is unstable and causes the storage tank to be scrapped, and designs a floating ball limiting device for the low temperature liquid storage tank, which is set through the liquid outlet of the filling pipe.
  • the slide valve driven by the float lever solves the technical problem of unstable structure of the float limiting device and prolongs the service life of the tank.
  • the technical solution adopted by the present invention for achieving the object of the invention is a float ball limiting device for a low temperature liquid storage tank, wherein the structure comprises a liquid adding pipe provided at the liquid discharging end in the liquid storage tank, and the liquid pipe is sprayed
  • the liquid hole is located on the pipe wall at the top of the pipe.
  • the key point is: the top end of the liquid pipe is matched with a slide valve, and the slide valve has a sliding fit in a vertical direction by the float ball type driving mechanism and the liquid pipe, and the limit is used.
  • the mechanism forms a opening and closing mechanism of the liquid discharge hole.
  • One of the key points of the design of the present invention is: separating the slide valve from the float ball and connecting them by a lever, the two movement directions are opposite, when the liquid flow needs to be closed, the float ball moves upward, the slide valve moves downward, the slide valve The gravity and the buoyancy of the float ball amplified by the lever act together on the slide valve, and the closing force is large and the action is more reliable.
  • the second key design of the present invention is: the float ball is set on the pendulum shaft to eliminate the sway of the float ball; at the same time, the central blind hole of the float ball and the swing bar constitute a plunger cylinder, and the gap between the two is controlled. , forming a damping of fast motion, can slow the vibration caused by bumps, avoid system shock, and improve the seismic performance of the system. At the same time, regardless of the high liquid level in the original container, the device can achieve precise control of the highest liquid level.
  • DRAWINGS 1 is a schematic view showing a state in which a spool valve is opened in the present invention.
  • FIG. 2 is a schematic view showing the state of the spool wall of the present invention.
  • FIG. 3 is a top plan view of the horizontal lever of FIG. 1.
  • 1 represents a liquid storage tank
  • 2 represents a liquid supply pipe
  • 3 represents a liquid discharge hole
  • 4 represents a slide valve
  • 4-1 represents a horizontal pin
  • 5 represents a pallet
  • 6 represents a pendulum
  • 7 represents a float.
  • Ball, 8 stands for horizontal lever
  • 9 stands for connecting rod
  • 10 stands for sliding sleeve
  • 10-1 stands for blind hole.
  • a float ball limiting device for a cryogenic liquid storage tank the structure includes a liquid adding pipe 2 disposed at a liquid discharging end in the liquid storage tank 1, and a liquid discharging pipe 3 of the liquid adding pipe 2 is located at a pipe at the top of the pipe On the wall, the top end of the liquid supply pipe 2 is matched with a slide valve 4, and the slide valve 4 has a sliding fit with the liquid supply pipe 2 in a vertical orientation by means of a float type lever drive mechanism, and a liquid discharge hole is formed by the limit mechanism.
  • the structure of the floating ball type lever driving mechanism comprises: a swinging rod 6 whose one end is fixed on the pallet 5 of the inner wall of the liquid storage tank 1, a floating ball 7, and a horizontal lever 8, and one end of the horizontal lever 8 is connected
  • the rod 9 is connected to the spool 4, and the other end is hinged to the float ball 7 by means of a connecting assembly provided on the central axis of the float ball, and the other end of the swing rod 6 is restrained in the float ball 7 along the central axis of the float ball 7, and
  • the floating ball 7 has a sliding fit in a vertical orientation.
  • the connecting component disposed on the central axis of the floating ball is a sliding sleeve 10 having a blind hole 10-1 at the upper portion, the upper end of the sliding sleeve 10 is hinged with the horizontal lever 8, and the swinging rod 6 is slidably restricted by the lower end of the sliding sleeve 10.
  • the floating ball In the sliding sleeve 10; the floating ball is limited by the blind hole 10-1 in the sliding sleeve 10.
  • the swing rod 6 and the blind hole 10-1 form a plunger cylinder damping mechanism by means of a clearance fit.
  • the limiting mechanism of the spool valve 4 is a horizontal pin 4-1 that is traversed at the top end of the spool valve 4.
  • the ratio of the arm end of the horizontal lever 8 to the arm length of the driving end is: 1 ⁇ 3:1.
  • the liquid discharge holes 3 on the liquid addition pipe 2 are provided in groups of 2 to 4, which are uniformly distributed on the pipe wall, and the top end of the liquid supply pipe 2 is closed.
  • the driving end of the horizontal lever 8 has a U-shaped fork structure.
  • a pin shaft is arranged on both sides of the lower portion of the spool valve 4, and a horizontal pin shaft 4-1 is arranged on the upper portion; the spool valve 4 is placed on the upper portion of the liquid filling pipe 2.
  • the spool 4 is connected to the float ball 7 via a connecting rod 9 and a horizontal lever 8.
  • the center of the float ball 7 has a through shaft, and the top end of the shaft is formed with a pin hole, which is fixed by the pin shaft and the long arm end of the horizontal lever 8; a blind hole 10-1 is formed on the central axis of the float ball to form a sliding sleeve 10, so that the float The ball 7 is placed on the swinging rod 6.
  • the limit end of the swing lever 6 is fixed to the pallet 5 by a pin shaft, and is restricted from swinging only to the left and right.
  • Action description Referring to Fig. 2, when the liquid level drops, the float ball descends with the liquid surface, the slide valve is moved upward by the lever, the liquid discharge port is opened, and the liquid can be added to the container through the liquid inlet tube; Lower, the pendulum will hold against the bottom of the blind hole of the float, restricting the float and slide valve from moving. Referring to Fig.
  • the liquid adding device detects the signal of increasing resistance, that is, stops adding liquid;
  • the traverse pin on the upper part of the spool will contact the top of the inlet tube to restrict the spool from moving down.
  • One of the key points of the design of the present invention is: separating the slide valve from the float ball, connecting each other through a lever, the movement direction of the two is opposite, when the liquid flow needs to be closed, the float ball moves upward, the slide valve moves downward, the slide valve Gravity and floating ball through the lever
  • the buoyancy works together on the slide valve, which has a large closing force and a more reliable action.
  • the second key to the design of the present invention is: the float ball is placed on the pendulum shaft to eliminate the sloshing of the float ball; at the same time, the central blind hole of the float ball and the swing bar constitute a plunger cylinder, and the control between the two is controlled.
  • Gap forming a damping of fast motion, can slow the vibration caused by bumps, avoid system oscillations, and improve the seismic performance of the system.
  • the device can achieve precise control of the highest liquid level.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Float Valves (AREA)

Abstract

一种低温储液罐的浮球限充装置。包括出液端设置在储液罐（1）内的加液管（2），加液管的喷液孔（3）位于管道顶部的管壁上。加液管的顶端配套滑阀（4），滑阀借助浮球式杠杆驱动机构与加液管具有沿竖直方位的滑动配合，并借助限位机构形成喷液孔的启闭机构。由此，解决现有浮球限充装置结构不稳固从而导致储罐报废的问题。

Description

一种低温储液罐的浮球限充装置 技术领域
[0001] 本发明是一种低温储液罐的限充装置， 属于深冷、 常压液化气储存及运输领域， 特 别是一种低温储液罐的浮球限充装置。
背景技术
[0002] 液化天然气的储存及运输是极其特殊的一个领域， 对液化天然气的储罐要求也不是 一般金属容器就能做到的。 奥氏体不锈钢在低温条件下具有较好的韧性和强度性能， 且与天 说
然气能很好相容， 经常被选用作为内部储罐的材质。 但奥氏体不锈钢同时也具有屈服强度低 的缺陷， 按 GB150 压力容器标准， 以材料屈服强度和抗拉强度为基准， 分别除以相应的安 书
全系数， 取其小值来确定材料许用应力值的方法， 往往导致奥氏体不锈钢材料许用应力值偏 低， 不能充分发挥材料承载能力。 若对奥氏体不锈钢材料不做任何处理而制成储罐的容器， 那么对其安全系数的要求就非常高， 相应也就要耗费更多的不锈钢材料， 不但增加了生产成 本， 同时也增加了运输成本， 减少了储液空间， 这是极其不经济的做法， 一般生产厂家都不 会采用这种方式。 为此， 研究人员通过应变强化实现了提高奥氏体不锈钢材料的屈服强度， 而经过应变强化处理的罐体不但降低了对安全系数的要求， 节约了生产材料的成本， 而且也 使罐体同时具备了较好的韧性、 强度性能和屈服强度。 经过应变强化后的储罐一旦在罐体上 重新开孔， 就会影响罐体整体的结构强度， 使得应变强化变得毫无意义， 罐体也就报废不能 继续使用。 所以， 储罐一旦投入使用就不能再重新开口进行检修或其他操作， 因此， 对设置 在储罐内部的辅助装置的要求， 尤其是用于转运的储罐的要求就显得尤其重要， 首先要具有 的品质是稳定性高。
[0003] 具体到用于运输天然气的液化天然气汽车上的储罐， 对储罐内结构的稳固性要求就 更高了。 现有储罐在车载瓶充液时， 要确保气瓶内胆顶部留有一定安全空间， 所以需要在储 罐内胆中设置防过充装置。
[0004] 现有技术， 一般采用在储罐内胆中设置缓冲罐的结构来达到此目的， 但缓冲罐的结 构笨重， 准确性差， 并且不能在非空罐充装时起到有效的限充作用； 也有采用浮球式限充阀 来达到限充的目的。
[0005] 浮球阀在日常生活中经常使用， 公开号为 【CN101561057A】 的专利公开了一种浮球 阀， 在阀门外设置浮球， 浮球通过杠杆与内部阀门连接， 利用浮球在液体在液体中的浮力达 到启闭阀门的目的。 这种浮球阀由于浮球设置在阀门外， 应用在罐体运输过程中非常不稳 定， 阀门组件容易磨损造成失灵。 为了使浮球阀能在液化气运输罐中使用， 首先要保证浮球 限充阀的稳定性， 降低其磨损， 为了达到这一目的， 本领域技术人员想到将浮球直接设置在 加液管中， 依靠加液管内壁限制住浮球， 使其不能自由晃动， 增强了浮球限充阀的稳定性， 但很快又出现了新的问题， 由于加液管固定在罐体里边， 加液管的直径不能太大， 浮球的大 小也就受到限制， 经常造成浮球和限充阀门失灵， 并且浮球与加液管管壁内径并不能紧密贴 合， 虽然浮球设置在管内， 但仍然无法保证浮球的稳定， 一旦限充阀门失灵， 低温深冷液体 无限充满在罐体内， 造成罐体压力过大， 极易发生爆炸。
[0006] 因此， 改进后的浮球限充装置虽说然设置在加液管内在一定程度上限制住了浮球， 但 由于浮球不能做的太大以及浮球并未被完全限制住， 在罐体运输过程中浮球限充阀仍然非常 不稳定， 严重影响了储罐的安全运输。 并且由于书浮球限充阀的不稳固， 造成其损坏频率的增 加， 虽然仅仅只是一小部分限充阀受到了损坏， 但由于不可能对储罐重新开口进行更换或检 修， 从而导致浮球限充阀一旦损坏就意味着储罐报废的结果。 因此， 为了延长储罐的使用寿 命， 如何保证限充装置的稳定性就成为困扰本领域技术人员的一大难题。
发明内容
[0007] 本发明为解决现有浮球限充装置结构不稳固从而导致储罐报废的技术问题， 设计了 一种低温储液罐的浮球限充装置， 通过在加液管出液口设置由浮球式杠杆驱动的滑阀， 解决 了浮球限充装置结构不稳定的技术问题， 延长了储罐的使用寿命。
[0008] 本发明为实现发明目的采用的技术方案是， 一种低温储液罐的浮球限充装置， 结构 中包括出液端设置在储液罐内的加液管， 加液管的喷液孔位于管道顶部的管壁上， 关键在 于： 所述加液管的顶端配套滑阀， 滑阀借助浮球式杠杆驱动机构与加液管具有沿竖直方位的 滑动配合， 并借助限位机构形成喷液孔的启、 闭机构。
[0009] 本发明的设计关键之一是： 将滑阀与浮球分离， 通过杠杆相互连接， 二者运动方向 相反， 需要封闭液流时， 浮球向上移动， 滑阀向下移动， 滑阀的重力和通过杠杆放大的浮球 浮力共同作用在滑阀上， 关断力大， 动作更可靠。
[0010] 本发明的设计关键之二是： 浮球套装在摆轴上， 消除了浮球的晃动； 同时浮球的中 心盲孔与摆杆组成柱塞缸， 通过控制二者之间的间隙， 形成对快速运动的阻尼， 可减缓浮球 因颠簸引起的震动， 避免系统震荡， 提高了系统的抗震性能。 同时无论原来容器内液位高 低， 本装置都能实现对最高液面的精确控制。
[0011] 下面结合附图对本发明进行详细说明。
附图说明 [0012] 图 1是本发明中滑阀开启状态示意图。
[0013] 图 2是本发明中滑阀管壁状态示意图。
[0014] 图 3是图 1中水平杠杆的俯视图。
[0015] 图中， 1 代表储液罐， 2 代表加液管， 3 代表喷液孔， 4 代表滑阀， 4-1 代表水平销 轴， 5代表托板， 6代表摆杆， 7代表浮球， 8代表水平杠杆， 9代表连杆， 10代表滑套， 10-1代表盲孔。
具体实施方式
[0016] 一种低温储液罐的浮球限充装置说， 结构中包括出液端设置在储液罐 1 内的加液管 2， 加液管 2的喷液孔 3位于管道顶部的管壁上， 所述加液管 2的顶端配套滑阀 4， 滑阀 4借助 浮球式杠杆驱动机构与加液管 2具有沿竖直方位书的滑动配合， 并借助限位机构形成喷液孔 3 的启、 闭机构。
[0017] 所述浮球式杠杆驱动机构的结构中包括： 一端限位在储液罐 1 内壁的托板 5 上的摆 杆 6、 浮球 7、 水平杠杆 8， 水平杠杆 8的一端借助连杆 9连接在滑阀 4上， 另一端借助设 置在浮球中心轴上的连接组件与浮球 7铰连， 摆杆 6的另一端沿浮球 7中心轴限位在浮球 7 内， 并与浮球 7具有沿竖直方位的滑动配合。
[0018] 所述设置在浮球中心轴上的连接组件是上部具有盲孔 10-1 的滑套 10， 滑套 10上端 与水平杠杆 8铰连， 摆杆 6由滑套 10下端滑动限位在滑套 10内； 浮球借助滑套 10内的盲 孔 10-1限位。
[0019] 所述摆杆 6与盲孔 10-1借助间隙配合形成柱塞缸式阻尼机构。
[0020] 所述水平杠杆 8的支点借助销轴限位在加液管 2管壁上的支座上。
[0021] 所述滑阀 4的限位机构是横贯限位在滑阀 4顶端的水平销轴 4-1。
[0022] 所述水平杠杆 8的限位端与驱动端的臂长比例是： 1~3： 1。
[0023] 所述加液管 2上的喷液孔 3设有 2~4组， 均布在管壁上， 加液管 2的顶端封闭。
[0024] 所述水平杠杆 8的驱动端呈 U型拨叉式结构。
[0025] 装配过程： 参看图 1， 加液管 2 顶部堵死， 在靠近顶部的圆截面上开有多个喷液孔
3。 滑阀 4下部两侧装有销轴， 上部横贯设有水平销轴 4-1 ; 将滑阀 4套装在加液管 2上部。 滑阀 4通过连杆 9和水平杠杆 8与浮球 7相连接。 浮球 7中心有贯通轴， 轴的顶端制作销 孔， 通过销轴与水平杠杆 8 的长臂端固定； 浮球中心轴上制作开口向下的盲孔 10-1 形成滑 套 10， 使浮球 7套装在摆杆 6上。 摆杆 6的限位端通过销轴固定在托板 5上， 限制其只能 左、 右摆动。 [0026] 动作描述： 参看图 2， 当液面下降， 浮球随液面下降， 通过杠杆带动滑阀向上移动， 喷液口被打开， 可以通过进液管向容器内加液； 液面继续降低， 摆杆将顶住浮球盲孔的底 部， 限制浮球和滑阀继续移动。 参看图 1， 当液面上升， 浮球随液面上升， 通过杠杆带动滑 阀向下移动， 直至喷液口被封闭； 此时加液装置检测到阻力增大的信号， 即停止加液； 滑阀 降至最下位置时， 滑阀上部的横贯销轴将与进液管顶部接触， 限制滑阀继续下移。
[0027] 本发明的设计关键之一是： 将滑阀与浮球分离， 通过杠杆相互连接， 二者运动方向 相反， 需要封闭液流时， 浮球向上移动， 滑阀向下移动， 滑阀的重力和通过杠杆放大的浮球 说
浮力共同作用在滑阀上， 关断力大， 动作更可靠。 本发明的设计关键之二是： 浮球套装在摆 轴上， 消除了浮球的晃动； 同时浮球的中心盲孔与摆杆组成柱塞缸， 通过控制二者之间的间 书
隙， 形成对快速运动的阻尼， 可减缓浮球因颠簸引起的震动， 避免系统震荡， 提高了系统的 抗震性能。 同时无论原来容器内液位高低， 本装置都能实现对最高液面的精确控制。

Claims

权 利 要 求 书
1. 一种低温储液罐的浮球限充装置， 结构中包括出液端设置在储液罐 （1) 内的加液管 (2)， 加液管 （2) 的喷液孔 （3) 位于管道顶部的管壁上， 其特征在于： 所述加液管 （2) 的顶端配套滑阀 （4)， 滑阀 （4) 借助浮球式杠杆驱动机构与加液管 （2) 具有沿竖直方位的 滑动配合， 并借助限位机构形成喷液孔 （3) 的启、 闭机构。
2. 根据权利要求 1 所述的一种低温储液罐的浮球限充装置， 其特征在于： 所述浮球式杠杆 驱动机构的结构中包括： 一端限位在储液罐 （1) 内壁的托板 （5) 上的摆杆 （6)、 浮球
(7)、 水平杠杆 （8)， 水平杠杆 （8) 的一端借助连杆 （9) 连接在滑阀 （4) 上， 另一端借 助设置在浮球中心轴上的连接组件与浮球 （7) 铰连， 摆杆 （6) 的另一端沿浮球 （7) 中心 轴限位在浮球 （7) 内， 并与浮球 （7) 具有沿竖直方位的滑动配合。
3. 根据权利要求 2 所述的一种低温储液罐的浮球限充装置， 其特征在于： 所述设置在浮球 中心轴上的连接组件是上部具有盲孔 （10-1) 的滑套 （10)， 滑套 （10) 上端与水平杠杆
(8) 铰连， 摆杆 （6) 由滑套 （10) 下端滑动限位在滑套 （10) 内； 浮球借助滑套 （10) 内 的盲孔 （10-1) 限位。
4. 根据权利要求 3 所述的一种低温储液罐的浮球限充装置， 其特征在于： 所述摆杆 （6) 与 盲孔 （10-1) 借助间隙配合形成柱塞缸式阻尼机构。
5. 根据权利要求 2 所述的一种低温储液罐的浮球限充装置， 其特征在于： 所述水平杠杆 (8) 的支点借助销轴限位在加液管 （2) 管壁上的支座上。
6. 根据权利要求 1 所述的一种低温储液罐的浮球限充装置， 其特征在于： 所述滑阀 （4) 的 限位机构是横贯限位在滑阀 （4) 顶端的水平销轴 （4-1)。
7. 根据权利要求 2 所述的一种低温储液罐的浮球限充装置， 其特征在于： 所述水平杠杆 (8) 的限位端与驱动端的臂长比例是： 1〜3： 1。
8. 根据权利要求 1 所述的一种低温储液罐的浮球限充装置， 其特征在于： 所述加液管 （2) 上的喷液孔 （3) 设有 2〜4组， 均布在管壁上， 加液管 （2) 的顶端封闭。
9. 根据权利要求 2 所述的一种低温储液罐的浮球限充装置， 其特征在于： 所述水平杠杆 (8) 的驱动端呈 U型拨叉式结构。
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JP2006329385A (ja) * 2005-05-30 2006-12-07 Morita Tekkosho:Kk フロート式水位調整弁
CN202868928U (zh) * 2012-08-23 2013-04-10 浙江吉利汽车研究院有限公司杭州分公司 一种自动供水装置

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* Cited by examiner, † Cited by third party
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CN112320121A (zh) * 2019-08-05 2021-02-05 张家港中集圣达因低温装备有限公司 船用储罐
CN112320121B (zh) * 2019-08-05 2022-04-19 张家港中集圣达因低温装备有限公司 船用储罐

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