CN208687362U - A kind of bomb valve sealing means - Google Patents

Abstract

The utility model proposes a kind of bomb valve sealing means, including shell, electric connector, main valve, off-load component, electromagnet assembly, unloading valve includes off-load component and electromagnet assembly and is therebetween to be slidably matched, electric connector is connected with electromagnet assembly, main valve is installed in the pilot hole of shell and slides axially in pilot hole, main valve is connect with off-load component by pin shaft, the face that is slidably matched between main valve and off-load component is clearance fit, it axially opposed can slide, be interference fit between pin shaft and off-load component.Bomb valve sealing means provided by the utility model are flexibly connected using pin shaft between main valve and off-load component, avoid the multi-guide between guide cylinder, electromagnet mounting hole, self-positioning performance is good, repetitive positioning accuracy is high, and sealing reliability is good.

Description

A kind of bomb valve sealing means

Technical field

The utility model belongs to bomb valve technology field, and in particular to a kind of bomb valve sealing means.

Background technique

The mainstream hydrogen storage mode of hydrogen powered vehicle is to store high pressure hydrogen using high pressure gas cylinder, to meet course continuation mileage need It asks, high pressure hydrogen pressure need to reach 70MPa, the mating cylinder valve of high pressure gas cylinder, for controlling the inflation/deflation of high pressure gas cylinder.Usual situation Under, cylinder valve is a kind of to be integrated with the pile-up valve of the components such as solenoid valve, temperature safety valve, manual switch, filter, work characteristics It include: great seal pressure differential range, wider operating temperature range, very long stream time and service life.But In practical application, because operting differential pressure is big, the factors such as abrasion, unfixed point hard time maintenance caused by long-time service generate hydrogen gas leakage, Go down for a long time, a large amount of hydrogen energy sources are wasted, it is often more important that bring insecurity factor.

Describe a kind of CNG fuel automobile cylinder valve in patent US00552117A, operating pressure up to 3600psi (about 24.8MPa), it is sealed into structure lines opposite metal hard-sealing between main valve and shell, is connected between main valve and unloading valve for pin, Main valve and unloading valve rely on the face guiding that is slidably matched between unloading valve and electromagnet.The product operating pressure is lower, sealing Pressure differential range is smaller, is unable to satisfy high pressure operation requirements.

Utility model content

To solve the problems, such as that of the existing technology, the utility model discloses a kind of bomb valve sealing means.

In order to solve the above technical problems, the utility model adopts the following technical solution:

A kind of bomb valve sealing means, including shell, deflation hand valve, electric connector, main valve, pin shaft, off-load component, electricity Magnet assemblies, main spring, magnetism-isolating loop, internal filter, external filter, pressure cap, cutting hand valve, cutting handle, deflation handle and peace Full valve component, unloading valve include off-load component and electromagnet assembly and are therebetween to be slidably matched, and deflation hand valve is in shell It slides along the axis, external power supply circuit is connect and is connected with electromagnet assembly by electric connector, and main valve is installed on leading for shell It slides axially into hole and in pilot hole, main valve is flexibly connected with off-load component by pin shaft, between main valve and off-load component Be slidably matched face be clearance fit, axially opposed can slide, between pin shaft and off-load component for interference fit, main spring peace Loaded between off-load component and electromagnet assembly and initial compression force is provided, the metallic matrix of off-load component is magnetic material.

Further, the shell includes an air inlet, a gas outlet, a safety valve exhaust port and a gas cylinder Interface, cylinder interface are connected and fixed by screw thread and high pressure gas cylinder whorl of bottleneck, by the bottleneck between shell and high pressure gas cylinder Sealing ring and bottleneck sealing ring realize sealing between the two, air inlet, gas outlet, safety valve exhaust port with cylinder interface phase It is logical, cylinder valve main channel and bleed passage, safety valve exhaust port and gas are set side by side between air inlet, gas outlet and cylinder interface It is safety valve inlet channel between bottle interface, cylinder valve main channel is used for inflation/deflation, is provided with unloading valve, main valve and cutting hand Valve, by its opening and closing of the control system of switching on or off electricity of electromagnet assembly, bleed passage connects gas outlet and gas cylinder inner cavity, is provided with and puts Gas hand valve, manually controllable deflation, safety valve inlet channel connection safety valve exhaust outlet and gas cylinder inner cavity, are arranged safety valve thereon Component, reaching assigned temperature can automatically turn on, and be vented gas in gas cylinder by safety valve exhaust port.

Further, the electric connector is divided into outer end and inner end, and outer end and inner end have positive terminal and cathode to connect The binding post of terminal, identical polar is held on, and the binding post of opposite polarity keeps insulation, and electric connector is fixedly installed in shell On in the cable aperture that is stepped, realize sealing by the first retaining ring and the first sealing ring between electric connector side and shell, Two binding posts of anode, negative terminal of electric connector inner end are connected and fixed with two lead-out wires of electromagnet assembly respectively, It is held on, two binding posts of anode, negative terminal of electric connector outer end are to retain interface, are supplied in use process with outside Electric circuit connection.

Further, on the cylinder valve main channel of the shell, perpendicular to axis, it is provided with the primary seal seam allowance of annular, together Axis is provided with pilot hole in cylinder valve main channel, and for installing main valve, cylinder valve main channel is coaxially provided with electromagnet mounting hole, uses In installation electromagnet assembly.

Further, it is provided with primary seal seam allowance on the shell, sealing ring and sealing seam allowance, off-load are provided on main valve It is provided with diaphragm seal at the top of component, when high pressure cylinder valve is in close state, sealing ring contacts with primary seal seam allowance and keeps compressing State, diaphragm seal with sealing seam allowance contact and keeps impaction state, be sealed, primary seal seam allowance top cross-section be it is arc-shaped, Inside is straight line with axis parallel, and outside is the oblique line angled with central axes, the straight line and oblique line with top Portion's circular arc is tangent, and from top to bottom, sectional area is gradually increased.Preferably, oblique line and central axes angle are 20 ° or so.

Further, the main valve is installed in the pilot hole of shell, can be slid axially in pilot hole, the two Unilateral radial clearance is 0.02~0.03mm, and main valve includes the first, second two end faces, an outer circle and a unloading holes, main The first end face of valve is sealing surface, and normally, which can be higher nonmetallic using intensity, and second end face is stopped for off-load Mouthful, off-load bore dia is much smaller than primary seal seam allowance diameter, usually 0.3~0.4mm, and ream has a plane in outer circle, is used for gas Circulation, unloading hole and off-load seam allowance are in main valve central axis, off-load seam allowance end face and main valve central axis upright.

Further, the off-load component is gathered around there are two end face and an outer circle, and the metallic matrix of off-load component uses magnetic Property material be made, the first end face of off-load component is sealing surface, and common, sealing surface uses nonmetallic materials, using compound plus Work technique is fixed on off-load component metals matrix, and second end face is planar annular, and off-load component has central through hole, from second end Face extends near first end face, and first end face nearby exports justifies cylindrical side outside.

Further, the first pin shaft hole that second end face has one perpendicular to main shaft, the off-load are located on the main valve Component is located at the second pin shaft hole that first end face has one perpendicular to main shaft, and main valve is connect with off-load component by pin shaft, pin shaft It is interference between pin shaft and the second pin shaft hole also cross the first pin shaft hole on main valve, the second pin shaft hole on off-load component Cooperation, the first pin shaft bore dia are greater than pin shaft outer diameter, are clearance fit between main valve and off-load component, can occur along axial phase To sliding, maximum relative displacement amount is greater than the half of off-load bore dia.

Further, the first pin shaft bore dia 0.3~0.4mm big compared with pin shaft outer diameter, it should be ensured that off-load component first end face Rear pin shaft is contacted with main valve second end face and the first pin shaft hole is not in contact and interaction force, main valve and the off-load component Between unilateral radial clearance about 0.05~0.1mm, can occur between unloading valve and main valve around radially and tangentially small range rotate.

Further, the electromagnet assembly includes electromagnet, end cap, electromagnet housing, guide cylinder, coil (containing coil Skeleton), locking nut, block, lead-out wire, be installed in the electromagnet mounting hole of shell, electromagnet housing, end cap, block are equal For magnetic material, coil is fixedly installed in electromagnet housing inner cavity, and end cap is fixedly installed in electromagnet housing first end face, electromagnetism Iron-clad body second end face is equipped with internal thread hole, and the axis of thread is coaxial with electromagnet housing, and block is open circles column structure, block First end face be plane, have helicitic texture on the outside of second end face, centre bore circulation area should be not less than main channel minimum equivalent Circulation area, block are installed on electromagnet assembly center and by the interior of the screw thread of second end face and electromagnet housing second end face Threaded hole is connected and fixed, and passes through the relative position between the adjustable block of rotary block and electromagnet housing, adjustable gear Primary clearance between block and off-load component, locking nut are connect with the nut of block second end face, one end face and electromagnetism Iron-clad body second end face is contacted and is compressed, and main valve is opened when electromagnet assembly is powered, and gas is by being located at electromagnet assembly center The 6th channel flow to the gas outlet on shell, for absorbing the heat generated in electromagnet assembly galvanization.

Further, the guide cylinder is thin wall typed structure, and outer diameter is identical as internal coil diameter, outside internal diameter and off-load component Diameter is identical, keeps radial clearance about 0.05~0.1mm with off-load component outer diameter, guide cylinder is that non-magnetic material is made, Ke Yixuan With anti-attrition good, easy to process aluminium bronze or tin bronze, the guide cylinder is connected and fixed with block, can be turned with block Dynamic and axial movement.

Further, centre bore, the center-hole diameter and block of off-load component are provided on the block and off-load component Center bore is identical.

Further, after the main valve and electromagnet assembly are installed, sliding is formed between off-load component and guide cylinder Cooperation, off-load component second end face and block first end face are provided with the spring base of installation main spring, main spring both ends difference Compressive state is contacted and kept with aforementioned spring base, axial pre tightening force is provided, and off-load component first end face is pressed on main valve On the off-load seam allowance of biend, main spring pretightning force be greater than frictional force between main valve and shell, off-load component and guide cylinder it With initial installation gap between off-load component and block is greater than off-load bore dia, and main spring is installed on off-load component and block Between and upward axial force generated to off-load component by main spring, the coil of energization generates downward electromagnetism to off-load component Suction drives off-load component to move downward, main valve is moved downward with off-load component greater than the axial force of main spring.

Further, the cutting hand valve has both ends, and first end face is sealing surface, and second end face is T-slot, with cutting hand The T forming head of handle cooperates, and cutting hand valve is installed in shell, can slide along the axis, and the two is slidably matched face using the close of adaptation Sealing is realized in seal, corresponding, is provided with seal receptacle on shell cylinder valve main channel, is matched with cutting hand valve first end face It closing, it can be achieved that Open-close sealing, cutting handle is connect by screw thread with shell, and first end face is operating side, towards hull outside, the Biend is T forming head, is flexibly connected with the T-slot of cutting hand valve second end face, and activity between hand valve and cutting handle of cutting off connects It connects and the two can occur around axial relative rotation, but axial opposite sliding cannot occur, rotate clockwise cutting hand Handle, by connection screw thread be converted into cutting handle and cut off hand valve axial movement so that cutting hand valve first end face with Seal receptacle separation on the open close road of shell master, cylinder valve main channel are opened, and are connected to inside gas outlet and high pressure gas cylinder, conversely, the inverse time Needle rotation cutting handle, cuts off hand valve first end face with the seal receptacle on shell cylinder valve main channel and contacts, compresses and realize sealing, Cylinder valve main channel is closed, shell cut-off port and high pressure gas cylinder interior separations, can not realize that high pressure gas cylinder fills by cylinder valve main channel Deflating action.

Further, the deflation hand valve has both ends, and first end face is sealing surface, and second end face is T-slot, deflation hand valve Be installed in shell, can slide along the axis, the two be slidably matched face using sealing ring realize sealing, it is corresponding, in the shell There is seal receptacle on body bleed passage, cooperates with the deflation hand valve first end face, it can be achieved that Open-close sealing, deflation handle pass through spiral shell Line is connect with shell, and first end face is operating side, and towards hull outside, second end face is T forming head, with deflation hand valve second end face T-slot be flexibly connected, be flexibly connected between deflation hand valve and deflation handle, the two can occur around axial relative rotation, But axial opposite sliding cannot occur, deflation handle is rotated clockwise, converts deflation handle for the rotation of connection screw thread It deflates logical with the axial movement of deflation hand valve so that deflation hand valve first end face is separated with the seal receptacle on shell bleed passage Road is opened, and is connected to inside the shell gas outlet and high pressure gas cylinder, conversely, the deflation handle is rotated counterclockwise, deflation hand valve First end face contacts, compresses and realizes sealing with the seal receptacle on shell bleed passage, and bleed passage is closed, and the shell is deflated Mouthful with high pressure gas cylinder interior separations, gas will not flow out in high pressure gas cylinder.

Compared with prior art, of the utility model to have the beneficial effect that

The utility model discloses a kind of bomb valve sealing means, including shell, deflation hand valve, electric connector, main valve, Pin shaft, off-load component, electromagnet assembly, main spring, magnetism-isolating loop, internal filter, external filter, pressure cap, cutting hand valve, cutting hand Handle, deflation handle, unloading valve include off-load component and electromagnet assembly and are therebetween to be slidably matched, and external power supply circuit is logical It crosses electric connector to connect and be connected with electromagnet assembly, main valve is installed in the pilot hole of shell and axially slides in pilot hole Dynamic, main valve is flexibly connected with off-load component by pin shaft, and the face that is slidably matched between main valve and off-load component is clearance fit, can Axially opposed sliding is interference fit between pin shaft and off-load component, and main spring is installed on off-load component and electromagnet assembly Between and initial compression force is provided, the metallic matrix of off-load component is magnetic material, and cutting handle is flexibly connected with hand valve is cut off And axial relative rotation occurs, by being flexibly connected with deflation hand valve, deflation hand valve slides along the axis deflation handle in shell. Bomb valve sealing means provided by the utility model, primary seal seam allowance are variable cross-section product structure, can effectively adapt to big pressure difference model Enclose interior sealing；Primary seal seam allowance and pilot hole are on Same Part, and handling ease guarantees geometric tolerance precision, processing technology Property is good；It is flexibly connected between main valve and off-load component using pin shaft, avoid between guide cylinder, electromagnet mounting hole multiple leads To self-positioning performance is good, repetitive positioning accuracy is high, and sealing reliability is good；It is connected through a screw thread between block and electromagnet housing, By turning screw thread, initial air gap between adjustable block and off-load component, and pass through locking nut after regulating Fixed position, increases valve regulated performance, achieves the beneficial effects such as good seal performance, reliable in action, modulability be good.

Detailed description of the invention

Fig. 1 is the A-A sectional structure chart of the utility model Fig. 2；

Fig. 2 is the B-B sectional structure chart of the utility model Fig. 1；

Fig. 3 is the utility model lower bottle valve main channel sealed structure chart in off position；

Fig. 4 is the primary seal seam allowance cross section structure figure of the utility model；

Fig. 5 is the structure chart of the electromagnet assembly of the utility model；

Fig. 6 is unloading valve state and gas flow schematic diagram when the utility model is inflated；

Fig. 7 is the unloading valve open state and gas flow schematic diagram of the utility model；

Fig. 8 is the main valve open state and gas flow schematic diagram of the utility model；

Fig. 9 is that the cutting hand valve of the utility model closes schematic diagram；

Figure 10 is that the deflation hand valve of the utility model opens schematic diagram；

Wherein, 1- shell；1a- primary seal seam allowance；1b- first seals seam allowance；1c- second seals seam allowance；1d- pilot hole； 2- deflation hand valve；2a- conical seal (contact) face；3- electric connector；The first retaining ring of 4-；The first sealing ring of 5-；6- bottle sealing circle；7- master Valve；7a- sealing ring；7b- seals seam allowance；7c- unloading hole；7d- limit hole；8- pin shaft；9- off-load component；9a- diaphragm seal；9b- Off-load component lower end surface；10- electromagnet assembly；10a- end cap；10b- electromagnet housing；10c- guide cylinder；10d- coil rack； 10e- coil；10g- block；10h- locking nut；10f- magnetism-isolating loop upper surface；The second retaining ring of 11-；12- bottleneck sealing ring；13- Main spring；14- magnetism-isolating loop；15- internal filter；16- circlip for shaft；The first circlip for hole of 17-；It uses in the second hole 18- Circlip；19- external filter；The second sealing ring of 20-；21- third retaining ring；22- deflation handle；23- pressure cap；24- cuts off hand Handle；25- cuts off hand valve；25a- conical seal (contact) face；26- fourth gear circle；27- third sealing ring；28- relief valve assembly；100- high Air bottle；101- gas cylinder inner cavity；102- air inlet；The gas outlet 103-；104- cylinder interface；105- cylinder valve main channel；105a- One channel；105b- first passage；105d- third channel；105e- fourth lane；105f- Five-channel；The 6th channel 105g-； The channel 105h- I；The channel 106-；106a- first passage I；106b- second channel II.

Specific embodiment

To further illustrate each embodiment, the utility model is provided with attached drawing.These attached drawings are in the utility model discloses A part of appearance mainly to illustrate embodiment, and can cooperate the associated description of specification former come the running for explaining embodiment Reason.Cooperation refers to these contents, and those of ordinary skill in the art will be understood that other possible embodiments and sheet are practical new The advantages of type.Component in figure is not necessarily to scale, and similar component symbol is conventionally used to indicate similar component.

Now in conjunction with the drawings and specific embodiments, the present invention will be further described.

As Figure 1-10 shows, a kind of bomb valve sealing means, including shell 1, high pressure gas cylinder 100, cylinder valve main channel 105, deflation hand valve 2, electric connector 3, the first retaining ring 4, the first sealing ring 5, bottle sealing circle 6, main valve 7, pin shaft 8, off-load group Part 9, electromagnet assembly 10, the second retaining ring 11, bottleneck sealing ring 12, main spring 13, magnetism-isolating loop 14, internal filter 15, axis bullet Property retaining ring 16, the first circlip for hole 17, the second circlip for hole 18, external filter 19, the second sealing ring 20, third gear Circle 21, deflation handle 22, pressure cap 23, cutting handle 24, cutting hand valve 25, fourth gear circle 26, third sealing ring 27 and safety valve Component 28, high pressure cylinder valve is connected and fixed by the screw thread on shell 1 with high pressure gas cylinder 100, for controlling filling for high pressure gas cylinder 100 It deflates, cylinder valve main channel 105 has been arranged in parallel on high pressure cylinder valve, cylinder valve main channel 105 is used for inflation/deflation, is provided with off-load Valve, main valve 7 and cutting hand valve 25, by its opening and closing of the control system of switching on or off electricity of electromagnet assembly 10, bleed passage connects gas outlet 103 With gas cylinder inner cavity 101, it is provided with deflation hand valve 2, the high pressure cylinder valve of manually controllable deflation, the utility model is installed on one It is used in a system, upstream is connect with inflating gas cylinder pipeline and charge valve, and downstream passes through blowdown piping and locked pressure reducing valve It is connected with low-voltage solenoid valve etc., these contents do not influence the utility model embodiment not within the scope of this utility model Explanation, therefore do not embodied in Fig. 1.

Fig. 1 and Fig. 2 is the structural schematic diagram of high pressure cylinder valve, and main view Fig. 1 is the A-A cross-sectional view of Fig. 2, and top view Fig. 2 is The B-B cross-sectional view of Fig. 1, the state diagram as shown in the figure that high pressure gas cylinder bottleneck is installed on for high pressure cylinder valve.Specifically, shell 1 includes One cylinder interface 104 of gas outlet 103, one of air inlet 102, one and a safety valve exhaust port 107, air inlet 102 go out Port 103 is communicated with cylinder interface 104, the bottle that high pressure cylinder valve passes through cylinder interface 104 and high pressure gas cylinder 100 on shell 1 It mouthful is threadedly coupled and to fix, by bottle sealing circle 6 and high pressure gas cylinder 100 bottleneck for being set to 100 bottle mouth position of high pressure gas cylinder Bottleneck sealing ring 12 guarantees the good sealing property between cylinder valve and high pressure gas cylinder 100, air inlet 102, gas outlet 103 and gas cylinder Cylinder valve main channel 105 and bleed passage are set side by side between interface 104, air inlet 102 is connect with upstream supply air line, outlet Mouth 103 is connect with downstream pipe.

Cylinder valve main channel 105 be duplex channel, high pressure gas cylinder 100 during being filled and deflated by working media from cylinder valve master Channel 105 passes through, and cylinder valve main channel 105 passes through external filter 19, main valve 7, off-load component by air inlet 102, gas outlet 103 9, electromagnet assembly 10, internal filter 15 extend to gas cylinder inner cavity 101, be arranged in series on cylinder valve main channel 105 there are two Shut-off valve: main valve 7 and cutting hand valve 25, wherein main valve 7 is normally off, and by the control system of switching on or off electricity of electromagnet assembly 10, it is opened Closed state, cutting hand valve 25 are normally open, its direct manually controllable open/close states.

Electric connector 3 divides for outer end and inner end, and there are positive terminal and negative terminal, identical polar in outer end and inner end Binding post be held on, the binding post of opposite polarity keeps insulation, and electric connector 3 is fixedly installed on shell 1 and is stepped Cable aperture in, inside by high pressure gas active force, between 3 side of electric connector and shell 1 rely on the first retaining ring 4 and first Sealing ring 5 realize sealing, two binding posts of anode, negative terminal of 3 inner end of electric connector respectively with electromagnet assembly 10 Two lead-out wires are connected and fixed, are held on, and two binding posts of anode, negative terminal of 3 outer end of electric connector are to retain to connect Mouthful, in use process with external power supply circuit connection.Preferably, there are one spare electric connector, electrical connections for the utility model Device 3 is mutually backups with spare electric connector and the two structure is identical, anode, the negative terminal two of spare electric connector inner end Binding post is connected and fixed with two lead-out wires of electromagnet assembly 10 respectively, is held on.

Fig. 3 is the sealed structure chart of lower bottle valve main channel 105 in off position, and there are the sealing structures of parallel relationship at two Are as follows: sealing, off-load component 9 between shell 1 and main valve 7 and the sealing between main valve 7 have good sealing performance.Meanwhile To further increase sealing effect, primary seal seam allowance 1a is provided on shell 1, corresponding position is provided at two and seals on main valve 7 Structure, respectively sealing ring 7a and sealing seam allowance 7b, are provided with diaphragm seal 9a at the top of off-load component 9, are in and close in high pressure cylinder valve Under closed state, main valve 7 is in high pressure gas cylinder 100 under the action of high pressure gas, by upward axial force, the axial force and to On initial tension of spring collective effect under, sealing ring 7a and primary seal seam allowance 1a contact and keep impaction state, are formed certain Seal pressure, prevent high pressure gas from leaking to cylinder valve main channel 105.Similarly, off-load component 9 is in high pressure gas cylinder 100 Under high pressure gas effect, by upward axial force, under the axial force and the collective effect of upward initial tension of spring, sealing Piece 9a contacts and keeps impaction state with sealing seam allowance 7b, forms certain seal pressure, prevents high pressure gas from flowing to cylinder valve master Channel 105 leaks.

Preferably, the polyimides equal strength that sealing ring 7a can use compressive strength reach 150MPa is higher nonmetallic Material is made, and diaphragm seal 9a can be using nonmetallic materials systems such as intensity slightly lower polytrifluorochloroethylene or perfluoroethylene-propylene At, between non-metal workpiece and metallic matrix use hot press forming technology, prevent from collaborating.

On the cylinder valve main channel 105 of shell 1, perpendicular to axis, it is provided with annular primary seal seam allowance 1a, coaxially in cylinder valve master Channel 105 is provided with pilot hole 1d, interior to install main valve 7, and primary seal seam allowance 1a and pilot hole 1d are respectively positioned on shell 1, coaxially Cylinder valve main channel 105 is provided with electromagnet mounting hole, for installing electromagnet assembly 10, as shown in figure 4, in terms of section, it is main Seal seam allowance 1a top cross-section be it is arc-shaped, inside is straight line with axis parallel, and outside is angled with central axes Oblique line, straight line and oblique line are tangent with top arc, and from top to bottom, sectional area is gradually increased, in seal process, with In high pressure gas cylinder 100 gas pressure increase, the axial compressive force between sealing ring 7a and primary seal seam allowance 1a is increasing, uses After the structure, as axial compressive force increases, sealing ring 7a deflection increases and sealing ring 7a forced area increases, can effectively it subtract The compression incrementss of sealing ring 7a during small pressure rise guarantee that sealing ring 7a is not easy to be subject to crushing under high pressure, meet big Seal request in pressure differential range.Preferably, primary seal seam allowance 1a top arc radius is 0.25mm, outside and central axes angle It is 20 °, seam allowance total height is 0.5mm, and seam allowance surface roughness is Ra0.4.

It is sealed between shell 1 and main valve 7, between off-load component 9 and main valve 7, there is twice Open-close sealing structure, it is main On valve 7 be located at second end face have one perpendicular to main shaft the first pin shaft hole, off-load component 9 be located at first end face have one perpendicular to Second pin shaft hole of main shaft, main valve 7 are connect with off-load component 9 by pin shaft 8, and pin shaft 8 is also cross the first pin on main valve 7 Limit hole 7d is arranged on main valve 7 for the second pin shaft hole on axis hole and off-load component 9, is interference between pin shaft 8 and the second pin shaft hole Cooperation, the first pin shaft bore dia is greater than 8 outer diameter of pin shaft, and under original state, off-load component 9 is made in initial tension of spring and gas pressure Under, impaction state is kept with main valve 7, the upper and lower gap of pin shaft 8 and 7 upper limit hole 7d of main valve is respectively h10 and h20, off-load Gap between the 14 upper surface 10f of lower end surface 9d and magnetism-isolating loop of component 9 is h30, in order to ensure off-load component 9 and main valve 7 it Between keep certain normal pressure to realize sealing, gap h10 has to be larger than 0.

It is clearance fit between main valve 7 and off-load component 9, is interference fit, Ke Yifa between pin shaft 8 and off-load component 9 Raw axially opposed sliding, maximum relative displacement amount are greater than the half of unloading hole 7c diameter, for improve 7 guiding accuracy of main valve and Sealing performance；In the initial state, pin shaft 8 is not contacted with the side wall of limit hole 7d, the sliding between main valve 7 and off-load component 9 Mating surface is clearance fit, and the unilateral radial clearance in face that is slidably matched between main valve 7 and off-load component 9 is 0.05~0.1mm, pin shaft The sum of radial clearance is 0.3~0.4mm between 8 and the limit hole 7d of main valve 7, and main valve 7 is oriented in axial movement by shell Matched pilot hole 1d is provided on body 1, ensures the end face of primary seal seam allowance 1a and the axis of pilot hole 1d in machining process Line verticality in 7 closing process of main valve, passes through this flexible connection, it is possible to reduce multiple matching relationship brings the repetition of main valve 7 Constraint improves 7 guiding accuracy of main valve and sealing performance, while can simplify technique, reduces difficulty of processing.

Preferably, the first pin shaft bore dia 0.3~0.4mm big compared with pin shaft outer diameter, it should be ensured that 9 first end face of off-load component with 7 second end face of main valve contacts rear pin shaft 8 and the first pin shaft hole is not in contact and interaction force, between unloading valve and main valve 7 It can occur to rotate around radially and tangentially small range.

Fig. 5 show the structure chart of electromagnet assembly, and electromagnet assembly 10 and off-load component 9 have collectively constituted unloading valve, Be equivalent to a kind of Direct Action Type high-pressure solenoid valve in the prior art, off-load component 9 include two end faces, an outer circle rod structure, The lower end surface 9b of off-load component 9, the lower end surface 9b of off-load component 9 with magnetism-isolating loop 14 for being in contact, the outside cylinder of off-load component 9 Metallic matrix is magnetic material, and the first end face at 9 top of off-load component is sealing surface, and sealing surface uses nonmetallic materials, fixed In on the metallic matrix of off-load component 9, the second end face of bottom is planar annular, is provided on off-load component 9 identical as block 10g The centre bore in aperture, extends near first end face from second end face, and first end face is exported in outer cylindrical side, electromagnet assembly 10 are installed on shell 1 and are fixed by the threaded connection between pressure cap 23 and shell 1, off-load component 9 and electromagnet group To be slidably matched between part 10, main spring 13 is installed between the block 10g on off-load component 9 and electromagnet assembly 10, is in Pre-compressed state provides initial compression force, and main valve 7 is installed in pilot hole 1d, can slide axially in pilot hole 1d, and two The unilateral radial clearance of person is 0.02~0.03mm, and main valve 7 is gathered around there are two end face, an outer circle, a unloading hole, main valve 7 first End face is sealing surface, and normally, which can be higher nonmetallic using intensity, and second end face is off-load seam allowance, off-load Hole 7c diameter is much smaller than primary seal seam allowance 1a diameter, usually 0.3~0.4mm, and ream has a plane in outer circle, is used for gas stream Logical, 7 center of main valve is provided with unloading hole 7c, is the outlet of unloading valve, and connection gas cylinder higher-pressure region and outside low pressure area, unloading hole 7c are leaned on There is an off-load seam allowance in nearly 9 one end of off-load component, and the off-load seam allowance and off-load component 9 of main valve form Open-close sealing pair, unloading hole 7c with Off-load seam allowance is in 7 central axis of main valve, off-load seam allowance end face and 7 central axis upright of main valve.

Electromagnet assembly 10 includes end cap 10a, electromagnet housing 10b, electromagnet, guide cylinder 10c, coil rack 10d, line It encloses 10e, block 10g and locking nut 10h, under coil 10e energized state, downward electromagnetic attraction is generated on off-load component 9, The electromagnetic attraction is greater than the axial pre tightening force of main spring 13, overcomes spring force that off-load component 9 is driven to move downwardly to restraining position, Gap h30 becomes 0, and after coil 10e power-off, electromagnetic attraction disappears, and under the upward responsive to axial force of main spring 13, pushes off-load Component 9 moves upwards reset.Preferably, the magnetism-isolating loop 14 of thickness 0.1mm is provided between off-load component 9 and block 10g, every magnetic Ring 14 is fixedly mounted on block 10g and is in contact with the lower end surface 9b of off-load component 9, and magnetism-isolating loop 14 is non-magnetic material, can The influence for effectively solving remanent magnetism after coil 10e is powered off improves product closing and resets reliability.Preferably, guide cylinder 10c is used and is subtracted Mill property good, easy to process aluminium bronze or tin bronze are made.

As shown in fig. 6, electromagnet assembly 10 can be by cylinder valve to high pressure gas cylinder 100 in energized state and obstructed electricity condition Inflation.Specifically, electromagnet assembly 10 is in the energized state, main valve 7 is in the open state, air inlet 102 and gas cylinder inner cavity 101 Between form access, inflating gas cylinder may be implemented；For electromagnet assembly 10 under obstructed electricity condition, gas first passes around air inlet 102, external filter 19, first passage 105a reach cylinder valve main channel 105, and 7 outside pressure of main valve is higher than inside pressure (etc. at this time In 101 pressure of gas cylinder inner cavity), under downward gas out-of-balance force effect, main valve 7, off-load component 9 is pushed to move downward, after And main spring 13 is compressed to restraining position, main valve 7 is separated with the valve seat on shell 1, cylinder valve main channel 105 and fourth lane 105e It connects, gas continues through fourth lane 105e, Five-channel 105f, the 6th channel 105g and internal filter 15 into gas cylinder Inflation is realized in inner cavity 101.After inflating, by the gas source of external cutting air inlet 102, the inside and outside pressure at both sides of main valve 7 is flat Weighing apparatus, downward gas out-of-balance force disappear, and main valve 7 and off-load component 9 move up under the responsive to axial force of main spring 13 Restraining position, cylinder valve main channel 105 seal, and prevent gas from flowing outward.

Unloading valve open state and gas flow direction figure as shown in Figure 7, electromagnet assembly 10 are powered under state, The electromagnetic field that electromagnet generates applies downward electromagnetic attraction to off-load component 9, overcomes upward initial tension of spring, drives off-load Component 9 moves downward, until gap h21 becomes 0 from h20, reaches restraining position, diaphragm seal 9a is separated with sealing seam allowance 7b, unloaded Lotus valve is opened, and high pressure gas passes through internal filter 15, channel 105g, channel 105f and unloading hole 7c, reaches gas outlet 103, this When, gas outlet 103 to downstream pipe chamber pressure constantly increases, and main valve 7 is under the effect of gas out-of-balance force, while by downward Electromagnetic attraction and upward gas out-of-balance force, electromagnetic attraction is not enough to that main valve 7 is driven to move downward, and main valve 7 remains It is in close contact with primary seal seam allowance 1a, gap h31=h30-h20, aperture h41 ≈ h20 when unloading valve is opened, circulation latus rectum is to unload The diameter d1 of lotus hole 7c, in order to guarantee that gas flows smoothly, it should be ensured that aperture h41 > d1*0.25.

Under unloading valve open state, downstream pipe chamber pressure is constantly increased, and the upward gas that main valve 7 is subject to is uneven Power is gradually reduced, until the out-of-balance force is less than downward electromagnetic attraction, downstream pipe pressure and high pressure gas cylinder 100 is interior at this time Cavity pressure basically reaches balance, under the action of electromagnetic attraction, overcomes spring axial force, main valve 7 is with off-load component 9 and pin shaft 8 It moves downwardly together, until the lower end surface 9b of off-load component 9 is contacted with magnetism-isolating loop 14, main valve 7 is fully opened, 7 opening state of main valve State and gas flowing are as shown in figure 8, high pressure gas passes through the 6th channel 105g, Five-channel 105f, fourth lane 105e, third Channel 105d and cylinder valve main channel 105 enter gas outlet 103 and downstream pipe, to avoid in electromagnet long-time galvanization Life of product and reliability are influenced because generating amount of heat and temperature rise, electromagnet is laid out in gas cylinder internal by the utility model, Built-in, main valve 7 can be opened in the case of electromagnet is powered, and gas is flowed to out by electromagnet central axis i.e. the 6th channel 105g Port 103.

In 7 opening process of main valve, the relative position between off-load component 9 and main valve 7 is constant, i.e., gap between the two H12=h11=h10+h20, h42=h41 ≈ h20, main valve aperture h52 ≈ h31=h30-h20.Gap under original state H30 directly influences the main valve aperture and electromagnet suction size of product, and gap h30 increases, and main valve aperture increases, but electric Magnet suction is substantially reduced, and depositing can not overcome gas pressure and initial tension of spring to open unloading valve completely in a high voltage state Risk, gap h30 reduces, and electromagnet suction increases, but main valve aperture reduces therewith, may be unable to satisfy circulation area and want It asks.In order to solve the above technical problems, gap h30 is designed as adjustable item by the utility model, as shown in figure 5, block 10g passes through Screw thread is connect with electromagnet housing 10b, and when rotating clockwise block 10g, gap h30 reduces, when rotating counterclockwise block 10g, Gap h30 increases, and when being adjusted to suitable position, rotates clockwise locking nut 10h and extremely contacts and press with electromagnet housing 10b Tightly, the relative position of locking stop 10g and electromagnet housing 10b, it is ensured that gap h30 does not become in the cylinder valve course of work Change.

Internal filter 15 is fixed on 104 end of shell cylinder interface, cylinder interface 104 filtered by internal filter 15 after with Gas cylinder inner cavity 101 is connected to, and the filtering accuracy of internal filter 15 should be not less than 10 μm.External filter 19 is tubular structure, outer filtering The both ends of device 19 are entity flange and in-between section is the filter screen of tubulose, and external filter 19 passes through on both ends entity flange Through-hole and the first circlip for hole 17 matched respectively with both ends through-hole and the second circlip for hole 18 are mounted on In 1 one unthreaded hole of shell, air inlet 102 and gas outlet 103 are directly connected to by the inside of external filter 19, air inlet 102 and are gone out Port 103 is connected to by the side wall strainer of external filter 19 with gas cylinder inner cavity 101, and internal filter 15 passes through circlip for shaft 16 It is fixed on pressure cap 23, unthreaded hole internal diameter should be greater than 19 outer diameter of external filter, by unthreaded hole inner wall, 19 outer wall of external filter, the first hole An annular chamber is collectively constituted with circlip 17 and the second circlip for hole 18, annular chamber passes through cylinder valve main channel 105, puts Gas channel is connected to cylinder interface 104, and shell air inlet 102, gas outlet 103 are directly communicated with 19 inner hole of external filter, with ring Shape chamber is connected to after being filtered by 19 side wall of external filter.

Cutting handle 24 is fixedly connected by screw thread with shell 1, and cutting hand valve 25 is hand valve open in usual, hand valve unlatching with Closed state difference is as shown in Figure 2 and Figure 9, and cutting hand valve 25 has both ends, and first end face is sealing surface, and second end face is T-slot, Cutting hand valve 25 is installed in shell 1, can be slideed along the axis, and the two is slidably matched face using sealing ring realization sealing, cutting Handle 24 by T forming head with cut off hand valve 25 T-slot connect, have on shell 1 seal receptacle and with cut off 25 first end of hand valve Sealing is realized in face cooperation, and the first end face of cutting handle 24 is operating side, and towards 1 outside of shell, second end face is T forming head, with The second end face for cutting off hand valve 25 is flexibly connected, and the two can occur around axial relative rotation, but cannot occur axial The conical seal (contact) face 25a of opposite sliding, cutting hand valve 25 carries out surface carburization processing, for improving surface hardness；Turn clockwise Dynamic cutting handle 24, by the axial movement for being converted into cutting handle 24 and cutting off hand valve 25 of connection screw thread, so that cutting 25 first end face of hand valve is separated with the seal receptacle on the cylinder valve main channel 105 of shell 1, and cylinder valve main channel 105 is opened, and cuts off hand valve 25 conical seal (contact) face 25a is contacted and is compressed with the first sealing seam allowance 1b on shell 1, in gas outlet 103 and high pressure gas cylinder 100 Portion's connection, conversely, the cutting handle 24 is rotated counterclockwise, in cutting 25 first end face of hand valve and 1 cylinder valve main channel 105 of shell Seal receptacle contact, compress and realize sealing, cylinder valve main channel 105 is closed, the connection inside shell cutting and high pressure gas cylinder, nothing Method is filled and deflated by movement by the realization of cylinder valve main channel 105 high pressure gas cylinder 100.

There is bleed passage on shell 1, connects higher-pressure region and low-pressure area, be provided with deflation hand valve 2, deflation hand on bleed passage The seal receptacle of handle 22 and adaptation, for installing deflation hand valve 2, deflation hand valve 2 belongs to normally closed type hand valve, and 2 one end of deflation hand valve is Sealing surface, the other end are T-slot, and Open-close sealing pair is formed between the sealing surface and seal receptacle of deflation hand valve 2, manually controllable to put Gas, deflation handle 22 are connect by screw thread with shell 1, and deflation handle 22 is connect by T forming head with the T-slot of deflation hand valve 2, are put Gas hand valve 2 slides along the axis in shell 1, and the rotary motion of deflation handle 22 can be converted into deflation handle 22 and deflation hand valve 2 axial movement, the closing of deflation hand valve 2 and open state are distinguished as shown in figs. 2 and 10, the installation situation of deflation hand valve 2 Similar with cutting hand valve 25, deflation handle 22 is connect by screw thread with shell 1, and deflation handle 22 passes through T forming head and deflation hand valve 2 Connection, conical seal (contact) face 2a carries out surface carburization processing, for improving surface hardness；Under original state, channel 106 and high pressure gas High pressure gas connection in bottle 100, I 106a of first passage is connected to gas outlet 103 and downstream pipe, by tightening deflation clockwise Handle 22 makes its conical seal (contact) face 2a contact and compress with the second sealing seam allowance 1c on shell 1, cuts off channel 106 and first Channel 106a, prevents high pressure gas from leaking outside；When needing to open deflation hand valve 2, deflation handle 22 is rotated in the counterclockwise direction, into And deflation hand valve 2 is pulled to be axially moveable, so that conical seal (contact) face 2a is sealed seam allowance 1c with second and separate, high pressure gas passes through channel 106, I 106a of first passage and gas outlet 103 reach downstream pipe, and height can be realized under the obstructed electricity condition of electromagnet assembly 10 High pressure gas is connected to downstream pipe in air bottle 100；It preferably, can be according to actual needs by deflation handle 22 and cutting handle 24 operation element interface is set as different structure, prevents maloperation, improves operational safety.

Although specifically showing and describing the utility model in conjunction with preferred embodiment, those skilled in the art is answered This is understood, in the spirit and scope for not departing from the utility model defined by the appended claims, in form and details On the utility model can be made a variety of changes, be the protection scope of the utility model.

Claims (8)

1. a kind of bomb valve sealing means, which is characterized in that including shell (1), electric connector (3), main valve (7), off-load group Part (9) and electromagnet assembly (10) are provided with primary seal seam allowance (1a) on the shell (1), and main valve (7) is installed on shell (1) Pilot hole (1d) in and slide axially in the pilot hole (1d), sealing ring (7a) is provided on main valve (7) and seals seam allowance (7b), off-load component (9) top is provided with diaphragm seal (9a), and when high pressure cylinder valve is in close state, sealing ring (7a) and master are close Sealing mouth (1a) contacts and keeps impaction state, and diaphragm seal (9a) contacts and keep impaction state with sealing seam allowance (7b), carries out Sealing, the binding post of electric connector (3) are connected with the lead-out wire of electromagnet assembly (10), and main valve (7) passes through with off-load component (9) Pin shaft (8) is flexibly connected, and the face that is slidably matched between main valve (7) and off-load component (9) is clearance fit, can axially opposed cunning It is dynamic, it is interference fit between pin shaft (8) and off-load component (9), when off-load component (9) compresses main valve (7), pin shaft (8) and main valve (7) it is not contacted between pin shaft hole, off-load component (9) is installed in the guide cylinder (10c) of electromagnet assembly (10), off-load component (9) formation is slidably matched between guide cylinder (10c) and radial clearance between the two is 0.05~0.1mm.

2. a kind of bomb valve sealing means as described in claim 1, which is characterized in that at the top of the primary seal seam allowance (1a) Section be it is arc-shaped, inside is straight line with axis parallel, and outside is the oblique line angled with central axes, the straight line Tangent with top arc with oblique line, from top to bottom, sectional area is gradually increased.

3. a kind of bomb valve sealing means as claimed in claim 2, which is characterized in that at the top of the primary seal seam allowance (1a) Arc radius is 0.25mm, and outside and central axes angle are 20 °, and seam allowance total height is 0.5mm, and seam allowance surface roughness is Ra0.4。

4. a kind of bomb valve sealing means as described in claim 1, which is characterized in that electromagnet assembly (10) installation In in the electromagnet mounting hole on shell (1), electromagnet assembly (10) includes end cap (10a), lead-out wire, electromagnet housing (10b), guide cylinder (10c), coil rack (10d), coil (10e), block (10g) and locking nut (10h), end cap (10a) It is fixedly installed in electromagnet housing (10b) first end face, electromagnet housing (10b) second end face is equipped with internal thread hole and its screw thread Coaxially, coil (10e) is fixedly installed in the inner cavity electromagnet housing (10b), block (10g) peace by axis and electromagnet housing (10b) Loaded on electromagnet assembly (10) center, block (10g), which is connected through a screw thread, to be installed on electromagnet housing (10b), locking nut (10h) and block (10g) is connected through a screw thread and compresses electromagnet housing (10b), adjusts block by rotary block (10g) Relative position between (10g) and electromagnet housing (10b), it is initial between adjustable block (10g) and off-load component (9) Gap.

5. a kind of bomb valve sealing means as described in claim 1, which is characterized in that the metal of the off-load component (9) Matrix is magnetic material, and the first end face of off-load component (9) is sealing surface, and sealing surface uses nonmetallic materials, is fixed on off-load On the metallic matrix of component (9), second end face is planar annular, and off-load component (9) is provided with centre bore, extends to from second end face First end face, first end face are exported in outer cylindrical side.

6. a kind of bomb valve sealing means as described in claim 1, which is characterized in that be provided with one on the main valve (7) and hang down Directly in be provided on the first pin shaft hole of main shaft, the off-load component (9) one perpendicular to main shaft the second pin shaft hole, pin shaft It (8) is interference fit, the first pin shaft between pin shaft (8) and the second pin shaft hole also cross the first pin shaft hole and the second pin shaft hole Bore dia is greater than pin shaft (8) 0.3~0.4mm of outer diameter, and unilateral radial clearance 0.05 between main valve (7) and off-load component (9)~ 0.1mm。

7. a kind of bomb valve sealing means as described in claim 1, which is characterized in that there is off-load at main valve (7) center Hole (7c), higher-pressure region and outside low pressure area for being connected in high pressure gas cylinder (100), unloading hole (7c) is close to off-load component (9) There is off-load seam allowance in one end and itself and off-load component (9) form Open-close sealing pair, the pilot hole (1d) of main valve (7) and shell (1) it Between unilateral radial clearance be 0.02~0.03mm, the sum of radial clearance is between pin shaft (8) and the limit hole (7d) of main valve (7) 0.3~0.4mm, the maximum relative displacement amount between main valve (7) and off-load component (9) are greater than the radius of unloading hole (7c).

8. a kind of bomb valve sealing means as described in claim 1, which is characterized in that the sealing ring (7a) is using compression The polyimides that intensity reaches 150MPa is made, and diaphragm seal (9a) is made of polytrifluorochloroethylene or perfluoroethylene-propylene.