WO2021227772A1 - 一种安全阀和空压机 - Google Patents

一种安全阀和空压机 Download PDF

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Publication number
WO2021227772A1
WO2021227772A1 PCT/CN2021/087706 CN2021087706W WO2021227772A1 WO 2021227772 A1 WO2021227772 A1 WO 2021227772A1 CN 2021087706 W CN2021087706 W CN 2021087706W WO 2021227772 A1 WO2021227772 A1 WO 2021227772A1
Authority
WO
WIPO (PCT)
Prior art keywords
manual knob
valve
ring
safety valve
connecting nut
Prior art date
Application number
PCT/CN2021/087706
Other languages
English (en)
French (fr)
Inventor
李中权
沈立明
Original Assignee
鑫磊压缩机股份有限公司
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Filing date
Publication date
Application filed by 鑫磊压缩机股份有限公司 filed Critical 鑫磊压缩机股份有限公司
Publication of WO2021227772A1 publication Critical patent/WO2021227772A1/zh

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
    • F16K17/0486—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with mechanical actuating means

Definitions

  • This application relates to the technical field of safety valves, in particular to a safety valve and an air compressor.
  • the existing safety valve is shown in Figure 1.
  • the safety valve includes a valve body 1, a valve core 2, a valve stem 3, a connecting nut 5 and a protective cover; the right end of the connecting nut 5 is threadedly connected with the inner ring of the valve body 1, and The left end of the nut 5 is threadedly connected with the inner ring of the protective cover.
  • the connecting nut 5 is also fitted with a lock nut 6 between the valve body 1 and the protective cover.
  • the lock nut 6 is threaded with the connecting nut 5.
  • the valve stem 3 includes a valve The core mating part 31 and the moving rod part 32, the valve core mating part 31 is located in the valve body 1, the valve core 2 is fixedly arranged at the end of the valve core mating part 31, the moving rod part 32 penetrates the connecting nut 5, and the moving rod A spring 4 is penetrated on the right side of the part 32. One end of the spring 4 abuts against the connecting nut 5, and the other end abuts against the valve core matching part 31, so that the valve core 2 is normally closed and connected to the air hole 104, and the left end of the moving rod 32 penetrates
  • the protective cover is provided with a pull ring 100. When it fails, the pull ring 100 is pulled by hand, and the moving rod 32 is pulled to move to the left so that the valve core 2 is out of the normally closed state and the safety valve is opened.
  • the purpose of this application is to solve the above-mentioned problem of the exposed valve stem of the existing safety valve and provide a safety valve that facilitates better pulling of the valve stem to open the safety valve when it fails, which is convenient for the operator to operate, and at the same time, it also increases The scope of application of the safety valve.
  • a safety valve comprising a valve body, a valve core, a valve stem, a connecting nut and a manual knob; the center of the valve body is provided with a connecting air hole, the inner right end is a connecting air cavity, and the inner left end is provided with a valve stem
  • the moving cavity, the connecting air hole is connected to the connecting air cavity and the valve stem moving cavity, and the valve stem moving cavity is provided with a vent hole communicating with the outside;
  • the right end of the connecting nut is connected with the inner ring of the valve body, and the connecting nut
  • the left end is connected with the inner ring of the manual knob.
  • the manual knob has a locking position and a relative displacement position that can be switched on the connecting nut.
  • the manual knob In the locking position, the manual knob is fixedly connected with the connecting nut, and in the relative displacement position
  • the manual knob and the connecting nut can achieve relative displacement in the axial direction;
  • the valve stem includes a valve core matching part and a moving rod part, the valve core matching part is located in the valve stem moving cavity, and the valve core is fixedly arranged on the valve.
  • the end of the core fitting part is provided with a shaft hole in the middle of the connecting nut, the movable rod part is penetrated on the shaft hole, the right part of the movable rod part is penetrated with a spring, and one end of the spring abuts against the connecting nut , The other end abuts against the valve core mating part, so that the valve core is normally closed and connected to the air hole.
  • the left side of the movable rod is located in the manual knob, and the inner ring of the manual knob is provided with a limit convex ring, and the right end of the movable rod An outer convex ring is provided on the part passing through the limiting convex ring.
  • the left end of the connecting nut and the inner ring of the manual knob are connected by threads; the stroke of the connecting nut and the inner thread of the manual knob is greater than the distance between the limit convex ring and the outer convex ring.
  • the knob moves to the left, and the limit convex ring can drive the outer convex ring to pull the moving rod to move left to make the valve core out of the normally closed state.
  • the left end of the connecting nut and the inner ring of the manual knob are connected by threads; the stroke of the connecting nut and the inner thread of the manual knob is less than or equal to the distance between the limit convex ring and the outer convex ring.
  • the connecting nut is disconnected from the inner thread of the manual knob, and the manual knob is pulled to move to the left, and the limit convex ring can drive the outer convex ring to pull the moving rod to move to the left to make the valve core out of the normally closed state.
  • an elastic boss is provided on the connecting nut, and a slideway is provided on the inner ring of the manual knob.
  • the slideway has a locking groove and at least one straight groove. The elastic boss is locked in the locking groove and rotates. After one angle of the manual knob, the elastic boss is free from the locking groove and can slide on the straight groove to make the manual knob move to the left.
  • the limit convex ring can drive the outer convex ring to pull the moving rod to move left to make the valve core out of the normally closed state. .
  • a movement gap is provided between the left part of the manual knob and the outer convex ring, and the limit convex ring on the manual knob moves in cooperation with the outer convex ring after passing through the movement gap.
  • the left part of the manual knob is fixedly connected with a protective cover
  • the outer wall of the right part of the protective cover is provided with a matching snap ring
  • the matching snap ring is matched and fixedly connected with the matching bayonet.
  • the inner ring of the valve body is provided with internal threads
  • the outer ring of the connecting nut is provided with external threads.
  • the valve body and the connecting nut are matched by threads; the outer side of the connecting nut is also threaded with a lock nut, and the lock nut is located on the valve body And the manual knob.
  • the right part of the connecting nut is provided with a U-shaped groove matching the spring, and the left part of the spring is located in the U-shaped groove.
  • a retaining ring groove is provided on the left side of the moving rod, and a retaining ring is sleeved on the retaining ring groove.
  • An air compressor comprising a gas storage tank and the above-mentioned safety valve.
  • the gas storage tank is provided with a pressure switch bracket hole
  • the right end of the safety valve is provided with a connecting thread
  • the safety valve is connected to the pressure switch bracket hole through the connecting thread
  • the safety valve is connected with the gas tank through the connecting thread.
  • a safety valve adopting the above technical solution.
  • the safety valve is built-in through the valve stem, which improves the protection of the valve stem, prevents other external factors from interfering with the valve stem, and prevents the valve stem from being touched to cause the safety valve to open and affect the air
  • the press works normally; when it fails, the protective sleeve and the adjusting nut are threaded, threaded and pulled, and the locking adjustment pulling is used instead of direct pulling to prevent the safety valve from being opened directly, so that the safety valve is slowly opened and lifted.
  • the opening effect of the safety valve is also convenient for the operator to better move the valve stem.
  • the safety valve also avoids the use of safety valves with exposed stems in some countries and increases the scope of application.
  • the advantages of this patent are to enhance the protection of the valve stem, prevent it from being touched, and facilitate the opening of the safety valve in the event of failure, prevent direct pulling to open, improve the opening effect, and increase the service life.
  • Figure 1 is a schematic diagram of the structure of an existing safety valve.
  • Fig. 2 is a schematic structural diagram of a safety valve used in a micro air compressor in Example 1 of the application.
  • FIG. 3 is a schematic structural diagram of a safety valve used in a micro air compressor according to Embodiment 2 of the application.
  • Fig. 4 is a schematic structural diagram of a safety valve used in a micro air compressor according to Embodiment 3 of the application.
  • An air compressor includes a gas storage tank and a safety valve for a miniature air compressor.
  • the gas storage tank is provided with a pressure switch bracket hole, and the right end of the safety valve is provided with a connecting thread 103.
  • the safety valve is connected with the pressure switch bracket hole through the connecting thread 103, and the safety valve is connected with the gas storage tank through the connecting thread 103 to realize air pressure safety control.
  • the existing safety valve includes a valve body 1, a valve core 2, a valve stem 3, a connecting nut 5 and a protective cover; , The inner side of the left end is provided with a valve stem moving cavity 101, the connecting air hole 104 is connected to the connecting air cavity 105 and the valve stem moving cavity 101, and the valve stem moving cavity 101 is provided with a vent 102 communicating with the outside; the right end of the connecting nut 5 and The inner ring of the valve body 1 is threaded, and the left end of the connecting nut 5 is threaded to the inner ring of the protective cover.
  • the connecting nut 5 is located between the valve body 1 and the protective cover and is also fitted with a lock nut 6, which is connected to The nut 5 is screw-fitted.
  • the valve stem 3 includes a valve core matching portion 31 and a moving rod portion 32.
  • the valve core matching portion 31 is located in the valve stem moving cavity 101.
  • the valve core 2 is fixedly arranged at the end of the valve core matching portion 31, and the nut is connected 5 is provided with a shaft hole 51 in the middle part, the movable rod part 32 is penetrated on the shaft hole 51, the right part of the movable rod part 32 is penetrated with a spring 4, one end of the spring 4 is against the connecting nut 5, and the other end is against the valve core
  • the matching portion 31 abuts, so that the valve core 2 is normally closed and connected to the air hole 104, the left side of the moving rod 32 is located in the protective cover, and the left end of the moving rod 32 is provided with a pull ring 100 through the protective cover. Pull the ring 100, pull the moving rod 32 to move left to make the valve core 2 out of the normally closed state, so that the safety valve is opened.
  • the working principle of the existing safety valve adjust the air pressure by screwing the connecting nut 5 into the valve body 1. After the air pressure adjustment is completed, tighten the lock nut 6.
  • the compressed air is removed from the connecting
  • the cavity 105 enters and passes through the connecting air hole 104 to push the valve core 2 to move to the left, so that the safety valve is opened and discharged through the vent hole 102.
  • the air pressure in the air storage tank drops accordingly. 2 Push back to the original position, and the safety valve will automatically close.
  • the current safety valve is exposed through the left end of the valve stem 3, and it is easy to touch the pull rod during use, thereby inadvertently opening the safety valve, so that the safety valve cannot play a good control role, and it is easy to cause it in the exposed state. Damage, affect the service life.
  • the safety valve is directly opened by pulling the pull ring 100 directly.
  • a safety valve includes a valve body 1, a valve core 2, a valve stem 3, a connecting nut 5 and a manual knob 7; Connecting to the air cavity 105, a valve stem moving cavity 101 is provided inside the left end.
  • the valve stem moving cavity 101 facilitates the movement of the valve stem 3 in the valve stem moving cavity 101, thereby adjusting the position of the valve core 2 and enabling the safety valve to switch.
  • the connecting air hole 104 communicates with the connecting air cavity 105 and the valve stem moving cavity 101, and the valve stem moving cavity 101 is provided with a vent hole communicating with the outside, and the vent gas is discharged through the vent to adjust the air pressure.
  • the right end of the connecting nut 5 is connected with the inner ring of the valve body 1.
  • the inner ring of the valve body 1 is provided with an internal thread
  • the outer ring of the connecting nut 5 is provided with an outer thread.
  • the valve body 1 and the connecting nut 5 are matched by threads and matched by threads The method is convenient for positioning and adjustment of the connecting nut 5.
  • the left end of the connecting nut 5 is connected with the inner ring of the manual knob 7.
  • the manual knob 7 has a locking position and a relative displacement position that can be switched on the connecting nut 5, and the manual knob 7 is fixed with the connecting nut 5 in the locked position. Connected, the relative displacement in the axial direction can be achieved between the manual knob 7 and the connecting nut 5 at the relative displacement position.
  • the outer side of the connecting nut 5 is also threadedly connected with a lock nut 6, and the lock nut 6 is located between the valve body 1 and the manual knob 7.
  • the lock nut 6 is used to lock the connecting nut 5 after adjusting its position to prevent the connecting nut 5
  • follow-up moves to improve stability and locking firmness.
  • the valve stem 3 includes a valve core matching portion 31 and a moving rod portion 32.
  • the valve core matching portion 31 is used to cooperate with the valve core 2 to drive the valve core to move, and the moving rod portion 32 is used for the valve stem 3 to move and adjust.
  • the valve core matching portion 31 is located in the valve stem moving cavity 101, the valve core 2 is fixedly arranged at the end of the valve core matching portion 31, the valve core mounting seat 301 is provided on the right side of the valve core matching portion 31, and the valve core 2 is set in the valve In the core mounting seat 301, the valve core mounting seat 301 facilitates better limiting of the valve core 2 and further improves the positioning accuracy of the valve core 2.
  • a shaft hole 51 is provided in the middle of the connecting nut 5, the moving rod portion 32 passes through the shaft hole 51, the right side of the moving rod portion 32 is provided with a spring 4, and the right part of the connecting nut 5 is provided with a spring 4 A matching U-shaped groove 501, and the left side of the spring 4 is located in the U-shaped groove 501, one end of the spring 4 abuts against the connecting nut 5, and the other end abuts against the valve core fitting part 31, so that the valve core 2 is normally closed and connected to the air hole 104.
  • the U-shaped groove 501 is used to better limit the spring 4 in the connecting nut 5, so as to facilitate the spring 4 to drive the valve core 2 on the valve stem 3 to reset.
  • the left side of the moving rod 32 is located in the manual knob 7, the inner ring of the manual knob 7 is provided with a limiting convex ring 73, the right end of the moving rod 32 passes through the limiting convex ring 73 and is provided with an outer convex ring 10.
  • the limit convex ring 73 cooperates with the outer convex ring 10 to limit the position, which improves the degree of coordination while limiting the effect.
  • the manual knob 7 By turning the manual knob 7, the manual knob 7 moves to the left, and the limit convex ring 73 can drive the outer convex ring 10 to pull
  • the moving rod part 32 moves to the left to make the valve core 2 out of the normally closed state, and the outer convex ring 10 is used to prevent the left end of the moving rod part 32 from entering the valve stem moving groove 70 on the right part of the manual knob 7 during use, resulting in inability to judge
  • the position of the moving rod 32 in the valve rod moving groove 70 is not convenient for operation, and the manual knob 7 can also drive the valve rod 3 to move to the left to open the safety valve.
  • a retaining ring groove 321 is provided on the left side of the moving rod portion 32, and a retaining ring 9 is sleeved on the retaining ring groove 321.
  • the retaining ring 9 is used to limit the outer convex ring 10 to prevent the outer convex ring 10 from separating from the moving rod portion 32.
  • a moving gap 71 is provided between the left part of the manual knob 7 and the outer convex ring 10, and the limiting convex ring 73 on the manual knob 7 moves in cooperation with the outer convex ring 10 after passing through the moving gap 71.
  • the left inner side of the manual knob 7 is provided with a mating bayonet 72, the left part of the manual knob 7 is fixedly connected with a protective cover 8, and the right outer wall of the protective cover 8 is provided with a mating snap ring 81, the mating snap ring 81 and the mating bay 72
  • the valve stem 3 is set to be built-in through the protective cover 8 to prevent leakage installation, thereby preventing other external factors from interfering with the valve stem, touching the valve stem to open the safety valve, affecting the normal operation of the air compressor , But also has an impact on air pressure control.
  • the left end of the connecting nut 5 and the inner ring of the manual knob 7 are connected by threads; the stroke of the inner thread of the connecting nut 5 and the manual knob 7 is greater than the distance between the limit convex ring 73 and the outer convex ring 10. , By rotating the manual knob 7, the manual knob 7 moves to the left, and the limit convex ring 73 can drive the outer convex ring 10 to pull the moving rod 32 to move left to make the valve core 2 out of the normally closed state.
  • Rotating the protective cover 7 drives the connecting nut 5 to adjust the horizontal position of the valve stem 3, and the protective sleeve 7 and the connecting nut 5 are threaded instead of sliding fit, which is convenient for the operator to control better, and also prevents direct pulling to ensure safety The rapid opening of the valve will affect the safety valve and further enhance the use effect.
  • the working principle of the safety valve of this embodiment 1 is the same as that of the existing safety valve.
  • the safety valve needs to be opened with the help of external force, and the manual knob 7 is rotated to drive it to move to the left, so that the limit convex ring 73 on the manual knob 7 drives the outer convex ring 10 on the moving rod 32 Move to the left, so that the valve stem 3 drives the valve core to move to the left to open the safety valve.
  • the protective cover 7 When the safety valve of the present application is in normal use, the protective cover 7 is rotated regularly, and the valve stem 3 is pulled through the protective cover 7 to open the safety valve to exhaust air and clean up the dirt in the valve.
  • the structure and usage of the second embodiment are the same as those of the first embodiment, except that the coupling nut 5 and the manual knob 7 are different in cooperation.
  • the left end of the connecting nut 5 and the inner ring of the manual knob 7 are connected by threads; the stroke of the inner thread of the connecting nut 5 and the manual knob 7 is less than or equal to the limit convex ring 73 and the outer convex ring 10.
  • the safety valve In the case of safety valve failure, the safety valve needs to be opened with the help of external force.
  • the pulling efficiency is further improved by rotating first and then pulling.
  • the safety valve does not need to be opened slowly by rotating, which saves rotating time.
  • the structure and usage of the third embodiment are the same as those of the first embodiment, except that the coupling nut 5 and the manual knob 7 are different in cooperation.
  • an elastic boss 50 is provided on the connecting nut 5, and a slideway 700 is provided on the inner ring of the manual knob 7.
  • the slideway has a locking groove and at least one straight groove. Lock in the groove. After rotating the manual knob 7 for an angle, the elastic boss can be detached from the locking groove and can slide on the straight groove to move the manual knob 7 to the left.
  • the limit convex ring 73 can drive the outer convex ring 10 to pull and move. The rod 32 moves to the left so that the valve core 2 is out of the normally closed state.
  • the safety valve When the safety valve fails, the safety valve needs to be opened by external force.
  • the manual knob 7 is rotated to a certain angle to separate it from the connecting nut 5, and the slide on the manual knob 7 is matched with the straight groove to directly pull it.
  • the pulling efficiency is further improved, and the safety valve does not need to be slowly opened through the rotating method, which saves the time of rotation.
  • the safety valve of the present application has stable quality, safe and reliable performance, and rarely fails.
  • the safety valve should be inspected regularly (usually once a month). Occasionally, air leakage may occur, which reduces the working pressure of the air compressor. Up to the rated working pressure, no other safety problems will occur, and the safety valve also avoids the problem that safety valves with exposed stems cannot be used in some countries, increasing the scope of application.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mechanically-Actuated Valves (AREA)
  • Safety Valves (AREA)
  • Preventing Unauthorised Actuation Of Valves (AREA)

Abstract

一种安全阀和空压机，该安全阀包括阀体（1）、阀芯（2）、阀杆（3）、连接螺母（5）和手动旋钮（7）；连接螺母（5）的右端与阀体（1）的内圈相连接，连接螺母（5）的左端与手动旋钮（7）的内圈相连接，手动旋钮（7）在连接螺母（5）上具有能够相互切换的一个锁止位置和相对位移位置，在锁止位置上手动旋钮（7）与连接螺母（5）固定连接，在相对位移位置手动旋钮（7）与连接螺母（5）之间能实现轴向的相对位移；阀杆（3）包括阀芯配合部（31）和移动杆部（32），阀芯（2）固定设置于阀芯配合部（31）的端部，并在连接螺母（5）中部设有轴孔（51），移动杆部（32）穿设在轴孔（51）上，移动杆部（32）的右侧部上穿设有弹簧（4），移动杆部（32）的左侧部位于手动旋钮（7）内，手动旋钮（7）的内圈设有限位凸环（73），移动杆部（32）右侧端部穿过限位凸环（73）设有外凸环（10）。该技术方案将提升对阀杆（3）的保护性，便于失效时打开安全阀。

Description

一种安全阀和空压机 技术领域
本申请涉及安全阀技术领域，尤其涉及一种安全阀和空压机。
 背景技术
现有的安全阀如图1所示，该安全阀包括阀体1、阀芯2、阀杆3、连接螺母5和防护罩；连接螺母5的右端与阀体1的内圈螺纹连接，连接螺母5的左端与防护罩的内圈螺纹连接，连接螺母5上位于阀体1和防护罩之间还配合有锁紧螺母6，锁紧螺母6与连接螺母5螺纹配合，阀杆3包括阀芯配合部31和移动杆部32，阀芯配合部31位于阀体1内，阀芯2固定设置于阀芯配合部31的端部，移动杆部32穿设在连接螺母5上，移动杆部32的右侧部上穿设有弹簧4，弹簧4的一端与连接螺母5相抵，另一端与阀芯配合部31相抵，使阀芯2常闭连接气孔104，移动杆部32的左端穿过防护罩设置有拉环100，失效时，用手拉动拉环100，拉动移动杆部32左移使阀芯2脱离常闭状态，使安全阀打开。
现有的安全阀存在以下几点问题：（一）由于阀杆是外露的，在使用过程中很容易接触拉杆，从而将安全阀不经意的打开，这样安全阀无法起到很好的控制作用；（二）由于外露也很容易造成损坏，影响使用寿命；（三）目前部分国家对外露的拉环方式已经下令停止使用，在适用范围上也有所影响。
 技术问题
本申请的目的是为了解决上述现有安全阀阀杆外露的问题，提供一种安全阀，该安全阀便于失效时更好的拉动阀杆将安全阀打开，方便操作员操作，同时也增加了该安全阀的适用范围。
 技术解决方案
为本申请之目的，采用以下技术方案予以实现。
一种安全阀，该安全阀包括阀体、阀芯、阀杆、连接螺母和手动旋钮；所述的阀体的中心上设置有连接气孔，右端内部为连接气腔，左端内侧设置有阀杆移动腔，连接气孔连通连接气腔和阀杆移动腔，并在阀杆移动腔上设置有与外界连通的泄气孔；所述的连接螺母的右端与阀体的内圈相连接，连接螺母的左端与手动旋钮的内圈相连接，所述的手动旋钮在连接螺母上具有能够相互切换的一个锁止位置和相对位移位置，在锁止位置上手动旋钮与连接螺母固定连接，在相对位移位置手动旋钮与连接螺母之间能实现轴向的相对位移；所述的阀杆包括阀芯配合部和移动杆部，阀芯配合部位于阀杆移动腔内，所述的阀芯固定设置于阀芯配合部的端部，并在所述的连接螺母中部设置有轴孔，移动杆部穿设在轴孔上，移动杆部的右侧部上穿设有弹簧，弹簧的一端与连接螺母相抵，另一端与阀芯配合部相抵，使阀芯常闭连接气孔，所述的移动杆部的左侧部位于手动旋钮内，手动旋钮的内圈设置有限位凸环，移动杆部右侧端部穿过限位凸环设置有外凸环。
作为优选，连接螺母的左端与手动旋钮的内圈通过螺纹相连接；连接螺母与手动旋钮的内圈螺纹的行程大于限位凸环与外凸环之间的距离，通过旋动手动旋钮，手动旋钮左移，限位凸环能驱动外凸环拉动移动杆部左移使阀芯脱离常闭状态。
作为优选，连接螺母的左端与手动旋钮的内圈通过螺纹相连接；连接螺母与手动旋钮的内圈螺纹的行程小于等于限位凸环与外凸环之间的距离，通过旋动手动旋钮使连接螺母与手动旋钮的内圈螺纹脱离连接，拉动手动旋钮左移，限位凸环能驱动外凸环拉动移动杆部左移使阀芯脱离常闭状态。
作为优选，连接螺母上设置一个弹性凸台，手动旋钮内圈设置有一个滑道，该滑道具有一个锁止凹槽和至少一条直槽，弹性凸台在锁止凹槽内锁定，在旋转手动旋钮一个角度后，弹性凸台脱离锁止凹槽，能在直槽上滑动，使手动旋钮左移，限位凸环能驱动外凸环拉动移动杆部左移使阀芯脱离常闭状态。
作为优选，手动旋钮的左部与外凸环之间设置有移动间隙，手动旋钮上的限位凸环经过移动间隙后与外凸环相配合移动。
作为优选，手动旋钮的左部固定连接有防护盖，防护盖的右部外壁设置有配合卡环，配合卡环与配合卡口相配合固定连接。
作为优选，阀体的内圈设置有内螺纹，连接螺母的外圈设置外螺纹，阀体和连接螺母通过螺纹配合；连接螺母外侧还通过螺纹连接有锁紧螺母，且锁紧螺母位于阀体和手动旋钮之间。
作为优选，连接螺母的右部设置有与弹簧相匹配的U型槽，且弹簧的左侧部位于U型槽内。
作为优选，移动杆部左侧设置有挡圈槽，挡圈槽上套设有挡圈。
一种空压机，该空压机包括储气罐和上述的安全阀，储气罐上设置有压力开关支架孔，安全阀的右端设置有连接螺纹，安全阀通过连接螺纹与压力开关支架孔相连接，且安全阀通过连接螺纹与储气罐连通。
 有益效果
采用上述技术方案的一种安全阀，该安全阀通过阀杆设为内置，提升对阀杆保护性，防止外界其他因素对阀杆造成干扰，防止将阀杆触碰使安全阀开启从而影响空压机正常工作；失效时，通过防护套与调节螺母以螺纹配合的方式、螺纹和拉动配合方式以及锁止调节拉动代替直接拉动的方式，防止直接将安全阀开启，使安全阀缓慢打开，提升安全阀开启效果，同时也便于操作员更好的对阀杆进行移动操作，通过该安全阀也避免了部分国家无法使用外露阀杆的安全阀，增加了适用范围。
综上所述，本专利的优点是将提升对阀杆的保护性，防止被触碰，并且便于失效时打开安全阀，防止直接拉动打开，提升开启效果，提升使用寿命。
 附图说明
图1为现有安全阀的结构示意图。
图2为本申请实施例1微型空压机用的安全阀的结构示意图。
图3为本申请实施例2微型空压机用的安全阀的结构示意图。
图4为本申请实施例3微型空压机用的安全阀的结构示意图。
 本发明的实施方式
下面结合附图对本申请的具体实施方式做一个详细的说明。
一种空压机，该空压机包括储气罐和微型空压机用的安全阀，储气罐上设置有压力开关支架孔，安全阀的右端设置有连接螺纹103。安全阀通过连接螺纹103与压力开关支架孔相连接，且安全阀通过连接螺纹103与储气罐连通实现气压安全控制。
如图1所示，现有的安全阀包括阀体1、阀芯2、阀杆3、连接螺母5和防护罩；阀体1的中心上设置有连接气孔104，右端内部为连接气腔105，左端内侧设置有阀杆移动腔101，连接气孔104连通连接气腔105和阀杆移动腔101，并在阀杆移动腔101上设置有与外界连通的泄气孔102；连接螺母5的右端与阀体1的内圈螺纹连接，连接螺母5的左端与防护罩的内圈螺纹连接，连接螺母5上位于阀体1和防护罩之间还配合有锁紧螺母6，锁紧螺母6与连接螺母5螺纹配合，阀杆3包括阀芯配合部31和移动杆部32，阀芯配合部31位于阀杆移动腔101内，阀芯2固定设置于阀芯配合部31的端部，连接螺母5中部设置有轴孔51，移动杆部32穿设在轴孔51上，移动杆部32的右侧部上穿设有弹簧4，弹簧4的一端与连接螺母5相抵，另一端与阀芯配合部31相抵，使阀芯2常闭连接气孔104，移动杆部32的左侧部位于防护罩内，且移动杆部32的左端穿过防护罩设置有拉环100，失效时，用手拉动拉环100，拉动移动杆部32左移使阀芯2脱离常闭状态，使安全阀打开。 
现有的安全阀工作原理：通过将连接螺母5拧入阀体1内进行气压调整，气压调整完毕后，拧紧锁紧螺母6，当储气罐的气压超过正常气压时，压缩空气从连接气腔105处进入经过连接气孔104推动阀芯2向左运动，使安全阀打开并通过泄气孔102排出，储气罐内气压随之下降，达到正常气压时，通过弹簧4的回复力将阀芯2推回至原始位置，安全阀自动关闭。
安全阀在失效的情况下需要借助外力控制，通过拉动移动杆部32端部的拉环100带动阀杆3向左侧移动，从而使阀芯2向左移动，使安全阀打开。
目前的安全阀通过阀杆3左端是外露，在使用过程中很容易接触拉杆，从而将安全阀不经意的打开，这样安全阀无法起到很好的控制作用，并且在外露状态下也很容易造成损坏，影响使用寿命。在操作员外力控制时，直接拉动拉环100的方式，将安全阀直接打开，没有一定的缓冲，容易对安全阀造成，手动开启效果较差；并且目前现有这种外露阀杆式的安全阀在部分国家已经下令停止使用，所以这种外露阀杆式的安全阀在适用范围上也有所影响。
实施例 1
如图2所示，一种安全阀，该安全阀包括阀体1、阀芯2、阀杆3、连接螺母5和手动旋钮7；阀体1的中心上设置有连接气孔104，右端内部为连接气腔105，左端内侧设置有阀杆移动腔101，通过阀杆移动腔101便于阀杆3在阀杆移动腔101进行移动，从而调节阀芯2位置，使安全阀实现开关。连接气孔104连通连接气腔105和阀杆移动腔101，并在阀杆移动腔101上设置有与外界连通的泄气孔，通过泄气将孔气体排出，从而进行气压调节。连接螺母5的右端与阀体1的内圈相连接，阀体1的内圈设置有内螺纹，连接螺母5的外圈设置外螺纹，阀体1和连接螺母5通过螺纹配合，通过螺纹配合的方式便于使连接螺母5进行定位调整。连接螺母5的左端与手动旋钮7的内圈相连接，手动旋钮7在连接螺母5上具有能够相互切换的一个锁止位置和相对位移位置，在锁止位置上手动旋钮7与连接螺母5固定连接，在相对位移位置手动旋钮7与连接螺母5之间能实现轴向的相对位移。连接螺母5外侧还通过螺纹连接有锁紧螺母6，且锁紧螺母6位于阀体1和手动旋钮7之间，锁紧螺母6用于连接螺母5调整位置后将其锁紧，防止连接螺母5后续进行移动，提升稳定性和锁紧牢固性。阀杆3包括阀芯配合部31和移动杆部32，阀芯配合部31用于与阀芯2相配合，带动阀芯移动，移动杆部32用于阀杆3进行移动调节。阀芯配合部31位于阀杆移动腔101内，阀芯2固定设置于阀芯配合部31的端部，阀芯配合部31的右侧设置有阀芯安装座301，阀芯2设置在阀芯安装座301内，通过阀芯安装座301便于更好将阀芯2进行限位，进一步提升阀芯2定位精度。在连接螺母5中部设置有轴孔51，移动杆部32穿设在轴孔51上，移动杆部32的右侧部上穿设有弹簧4，且连接螺母5的右部设置有与弹簧4相匹配的U型槽501，且弹簧4的左侧部位于U型槽501内，弹簧4的一端与连接螺母5相抵，另一端与阀芯配合部31相抵，使阀芯2常闭连接气孔104，通过U型槽501便于更好将弹簧4限位在连接螺母5内，从而便于使弹簧4带动阀杆3上的阀芯2进行复位。移动杆部32的左侧部位于手动旋钮7内，手动旋钮7的内圈设置有限位凸环73，移动杆部32右侧端部穿过限位凸环73设置有外凸环10，通过限位凸环73与外凸环10相配合进行限位，提升配合度的同时限位效果，通过旋动手动旋钮7，手动旋钮7左移，限位凸环73能驱动外凸环10拉动移动杆部32左移使阀芯2脱离常闭状态，通过外凸环10用于使用时防止将移动杆部32的左端进入至手动旋钮7右部的阀杆移动槽70内，导致无法判断移动杆部32在阀杆移动槽70内的位置，不便于操作，并且也能通过手动旋钮7带动阀杆3向左移动，将安全阀打开。移动杆部32左侧设置有挡圈槽321，挡圈槽321上套设有挡圈9，通过挡圈9用于将外凸环10进行限位，防止外凸环10脱离移动杆部32。手动旋钮7的左部与外凸环10之间设置有移动间隙71，手动旋钮7上的限位凸环73经过移动间隙71后与外凸环10相配合移动。防止使限位凸环73直接拉动外凸环10向左侧移动，使阀芯直接打开，没有缓冲或逐渐打开的过程，以直接打开的方式对安全阀造成损坏，影响使用寿命。手动旋钮7的左部内侧设置有配合卡口72，手动旋钮7的左部固定连接有防护盖8，防护盖8的右部外壁设置有配合卡环81，配合卡环81与配合卡口72相配合固定连接，通过防护盖8实现将阀杆3设为内置，防止外漏安装，从而防止外界其他因素对阀杆造成干扰，将阀杆触碰使安全阀开启，影响空压机正常工作，同时也对气压控制有所影响。
本实施例1通过连接螺母5的左端与手动旋钮7的内圈通过螺纹相连接；连接螺母5与手动旋钮7的内圈螺纹的行程大于限位凸环73与外凸环10之间的距离，通过旋动手动旋钮7，手动旋钮7左移，限位凸环73能驱动外凸环10拉动移动杆部32左移使阀芯2脱离常闭状态。通过旋转防护罩7带动连接螺母5将阀杆3进行横向位置调节，并且防护套7与连接螺母5以螺纹配合的方式代替滑动配合，便于操作员更好的进行控制，也防止直接拉动将安全阀快速打开对安全阀造成的影响，进一步提升使用效果。
本实施例1的安全阀的工作原理与现有的安全阀工作原理相同。但在安全阀失效的情况下需要借助外力将安全阀打开，通过旋转手动旋钮7带动向左侧移动，从而使手动旋钮7上的限位凸环73带动移动杆部32上的外凸环10向左移动，进而使阀杆3带动阀芯向左侧移动将安全阀开启。
本申请的安全阀正常使用时，定期通过旋转防护罩7，再通过防护罩7拉动阀杆3来打开安全阀排气，清理阀内污物。
实施例 2
本实施例2与实施例1的结构和使用方式相同，仅在连接螺母5和手动旋钮7配合上存在不同。
如图3所示，连接螺母5的左端与手动旋钮7的内圈通过螺纹相连接；连接螺母5与手动旋钮7的内圈螺纹的行程小于等于限位凸环73与外凸环10之间的距离，通过旋动手动旋钮7使连接螺母5与手动旋钮7的内圈螺纹脱离连接，拉动手动旋钮7左移，限位凸环73能驱动外凸环10拉动移动杆部32左移使阀芯2脱离常闭状态。
在安全阀失效的情况下需要借助外力将安全阀打开，通过先旋转后拉动的方式，进一步提升拉动效率，不用一直通过旋转的方式将安全阀缓慢打开，节省旋转的时间。
实施例 3
本实施例3与实施例1的结构和使用方式相同，仅在连接螺母5和手动旋钮7配合上存在不同。
如图4所示，连接螺母5上设置一个弹性凸台50，手动旋钮7内圈设置有一个滑道700，该滑道具有一个锁止凹槽和至少一条直槽，弹性凸台在锁止凹槽内锁定，在旋转手动旋钮7一个角度后，弹性凸台脱离锁止凹槽，能在直槽上滑动，使手动旋钮7左移，限位凸环73能驱动外凸环10拉动移动杆部32左移使阀芯2脱离常闭状态。
在安全阀失效的情况下需要借助外力将安全阀打开，通过将手动旋钮7旋转一定角度，使其与连接螺母5脱离，并通过手动旋钮7上的滑道与直槽相配合直接进行拉动，通过锁止拉动的方式，进一步提升拉动效率，不用一直通过旋转的方式将安全阀缓慢打开，节省旋转的时间。
综上所述，本申请的安全阀质量稳定，性能安全可靠，很少出现故障，安全阀应定期检查(一般一个月一次)，偶有发生漏气，使空压机工作压力降低，达不到额定工作压力，不会产生其它安全问题，并且该安全阀也避免了部分国家无法使用外露阀杆的安全阀的问题，增大了适用范围。

Claims (10)

  1. 一种安全阀，其特征在于，该安全阀包括阀体（1）、阀芯（2）、阀杆（3）、连接螺母（5）和手动旋钮（7）；所述的阀体（1）的中心上设置有连接气孔（104），右端内部为连接气腔（105），左端内侧设置有阀杆移动腔（101），连接气孔（104）连通连接气腔（105）和阀杆移动腔（101），并在阀杆移动腔（101）上设置有与外界连通的泄气孔；所述的连接螺母（5）的右端与阀体（1）的内圈相连接，连接螺母（5）的左端与手动旋钮（7）的内圈相连接，所述的手动旋钮（7）在连接螺母（5）上具有能够相互切换的一个锁止位置和相对位移位置，在锁止位置上手动旋钮（7）与连接螺母（5）固定连接，在相对位移位置手动旋钮（7）与连接螺母（5）之间能实现轴向的相对位移；所述的阀杆（3）包括阀芯配合部（31）和移动杆部（32），阀芯配合部（31）位于阀杆移动腔（101）内，所述的阀芯（2）固定设置于阀芯配合部（31）的端部，并在所述的连接螺母（5）中部设置有轴孔（51），移动杆部（32）穿设在轴孔（51）上，移动杆部（32）的右侧部上穿设有弹簧（4），弹簧（4）的一端与连接螺母（5）相抵，另一端与阀芯配合部（31）相抵，使阀芯（2）常闭连接气孔（104），所述的移动杆部（32）的左侧部位于手动旋钮（7）内，手动旋钮（7）的内圈设置有限位凸环（73），移动杆部（32）右侧端部穿过限位凸环（73）设置有外凸环（10）。
  2. 根据权利要求1所述的一种安全阀，其特征在于，连接螺母（5）的左端与手动旋钮（7）的内圈通过螺纹相连接；连接螺母（5）与手动旋钮（7）的内圈螺纹的行程大于限位凸环（73）与外凸环（10）之间的距离，通过旋动手动旋钮（7），手动旋钮（7）左移，限位凸环（73）能驱动外凸环（10）拉动移动杆部（32）左移使阀芯（2）脱离常闭状态。
  3. 根据权利要求1所述的一种安全阀，其特征在于，连接螺母（5）的左端与手动旋钮（7）的内圈通过螺纹相连接；连接螺母（5）与手动旋钮（7）的内圈螺纹的行程小于等于限位凸环（73）与外凸环（10）之间的距离，通过旋动手动旋钮（7）使连接螺母（5）与手动旋钮（7）的内圈螺纹脱离连接，拉动手动旋钮（7）左移，限位凸环（73）能驱动外凸环（10）拉动移动杆部（32）左移使阀芯（2）脱离常闭状态。
  4. 根据权利要求1所述的一种安全阀，其特征在于，连接螺母（5）上设置一个弹性凸台（50），手动旋钮（7）内圈设置有一个滑道（700），该滑道（700）具有一个锁止凹槽和至少一条直槽，弹性凸台（50）在锁止凹槽内锁定，在旋转手动旋钮（7）一个角度后，弹性凸台（50）脱离锁止凹槽，能在直槽上滑动，使手动旋钮（7）左移，限位凸环（73）能驱动外凸环（10）拉动移动杆部（32）左移使阀芯（2）脱离常闭状态。
  5. 根据权利要求1所述的一种安全阀，其特征在于，手动旋钮（7）的左部与外凸环（10）之间设置有移动间隙（71），手动旋钮（7）上的限位凸环（73）经过移动间隙（71）后与外凸环（10）相配合移动。
  6. 根据权利要求1所述的一种安全阀，其特征在于，手动旋钮（7）的左部内侧设置有配合卡口（72），手动旋钮（7）的左部固定连接有防护盖（8），防护盖（8）的右部外壁设置有配合卡环（81），配合卡环（81）与配合卡口（72）相配合固定连接。
  7. 根据权利要求2所述的一种安全阀，其特征在于，阀体（1）的内圈设置有内螺纹，连接螺母（5）的外圈设置外螺纹，阀体（1）和连接螺母（5）通过螺纹配合；连接螺母（5）外侧还通过螺纹连接有锁紧螺母（6），且锁紧螺母（6）位于阀体（1）和手动旋钮（7）之间。
  8. 根据权利要求1所述的一种安全阀，其特征在于，连接螺母（5）的右部设置有与弹簧（4）相匹配的U型槽（501），且弹簧（4）的左侧部位于U型槽（501）内。
  9. 根据权利要求1所述的一种安全阀，其特征在于，移动杆部（32）左侧设置有挡圈槽（321），挡圈槽（321）上套设有挡圈（9）。
  10. 一种空压机，其特征在于，该空压机包括储气罐和权利要求1~9中任意一项权利要求所述的安全阀，储气罐上设置有压力开关支架孔，安全阀的右端设置有连接螺纹（103），安全阀通过连接螺纹（103）与压力开关支架孔相连接，且安全阀通过连接螺纹（103）与储气罐连通。
PCT/CN2021/087706 2020-05-14 2021-04-16 一种安全阀和空压机 WO2021227772A1 (zh)

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