CN100462600C

CN100462600C - Valve with counternut

Info

Publication number: CN100462600C
Application number: CNB2005100545998A
Authority: CN
Inventors: 保罗·克雷默; 雅克·施米特
Original assignee: Luxembourg Patent Co SA
Current assignee: Luxembourg Patent Co SA
Priority date: 2004-03-16
Filing date: 2005-03-16
Publication date: 2009-02-18
Anticipated expiration: 2025-03-16
Also published as: CN1670407A; KR20060043705A

Abstract

The preseent inventin provides a tap for a gas or liquid cylinder that comprises an inverted seat primary valve located in a main portion of a tap body and a secondary check valve spring biased into closed position and located below the lower end of a threaded section of a root end portion of the tap body. Both valves are actuated by an elongated stem extending from the main portion of the tap body into the root end portion. The check valve is mounted under a reduced diameter end section of the tap root end portion. When the tap is fixed to a gas or liquid cylinder, the secondary check valve is located in the cylinder, thereby remaining operative when the tap body is sheared-off at a location where it extends out from a cylinder tap aperture.

Description

The cock of gas or liquid tank

Technical field

The present invention relates to a kind of particularly means of transportation for example gas of trailer or the cock of liquid tank, be particularly related to a kind of such cock, it can be in that the jar of faucet body be outer partly be cut off the time, and the cock radicle still is retained in jar hole, prevents from that jar the splendid attire thing is uncontrolled to overflow.

Background technique

When cock was installed on gas or the liquid tank, its radicle is local at least can be threaded onto in the faucet hole of gas or liquid tank.Like this, the part of faucet body is received within jar faucet hole, and another part of cock extends to outside the jar from the jar faucet hole.Under unexpected situation, horizontal or axial force affacts on the cock part of stretching out jar faucet hole, and its power may be very big, and the faucet body that can cause stretching out near the position of jar faucet hole is cut off.If cock is cut off, be provided be used for by cock open or close the fluid passage the main valve device tap body portion with still be contained in jar part of faucet hole faucet body and separate.Like this, under the situation that the main valve device damages, the splendid attire thing in jar can be run out of, if splendid attire poisonous, inflammable or explosion hazard gases or liquid particularly jar, this is a danger close.In the prior art, the main valve upstream (between promptly in main valve device and jar) that has proposed in cock is provided with auxiliary check valve apparatus, and auxiliary check valve apparatus is pushed to closed position by the hydrodynamic pressure that holds in biasing spring and the jar.In the prior art, this is check valve apparatus or be provided with in the outer installment of jar or near the main valve device as can be known, it has is the danger of being cut off with the tap body that the main valve device is housed, or has because the effect of external force is damaged the feasible danger that can not closely close this jar hole at least.

Also have known one-way valve to be biased into the enable possition and when the main valve operating device is malfunctioning, only close by the pressure in the jar by spring.

Summary of the invention

The object of the invention is to provide the cock of a kind of improved gas or liquid tank, when the faucet body that stretches out jar faucet hole is cut off or cause the malfunctioning faucet body of main valve device to be out of shape, prevents that the liquid in the jar from flowing out.

Cock according to the invention provides a kind of gas or liquid tank comprises: one has the faucet body of radicle, and described radicle has free end and external thread section; One long valve stem equipment in described faucet body, described valve stem equipment has longitudinal axis; One reverse valve seat formula main valve device is arranged on a side opposite with described free end of radicle in the described faucet body; One auxiliary check valve apparatus, it has removable valve member, is biased into the closed position that it is cooperated with unidirectional valve seat on the radicle by spring; Wherein said valve stem equipment moves axially the described main valve device of unlatching towards the first direction of described auxiliary check valve apparatus, and overcome biasing spring power and open described auxiliary check valve apparatus, making fluid pass described faucet body from the outlet that enters the mouth flows, and allow to close described auxiliary check valve apparatus and close described main valve device by biasing spring in opposite second direction, with by fluid flowing from the described described outlet that enters the mouth of faucet body, it is characterized in that: described radicle is included in the external thread section of radicle and the reduced diameter section between its free end, one open ended sleeve pipe is fixed on the described reduced diameter section, described removable valve member is arranged in the described sleeve pipe, and described unidirectional valve seat forms on described reduced diameter section.

In a preferred embodiment, described unidirectional valve seat forms at the free end of reduced diameter section, and its unidirectional valve member comprises that one is positioned at the piston piece under the described reduced diameter section and is guided in the sleeve pipe axial motion, and preferably described one-way valve biasing spring is not in passing the fluid passage of check valve apparatus, but in spring housing, described spring housing gets around the communication passage of passing one-way valve.Like this, having reduced gas stream crosses the turbulent flow of one-way valve and has reduced spring pressure and vibration.

Thus, auxiliary one-way valve separates in contrast to tap body portion one side and the radicle thread section that comprise the main valve device at described radicle.When in the cock tank filling faucet hole, therefore auxiliary check valve apparatus is positioned at tank body dearly, it still remains on this position and prevents owing to affact the distortion that the external force in the tap body portion causes so that cut off the back in jar faucet body outside, thereby still can keep in full force and effect at the auxiliary check valve apparatus in faucet body distortion back.Cock according to the invention provides a kind of gas or liquid tank comprises: have the faucet body of radicle, described radicle has free end and external thread section, and this external thread section is suitable for being bonded in the tapped hole of gas or liquid tank; Be installed in the valve stem equipment in the described faucet body, described valve stem equipment has longitudinal axis; The main valve device is arranged in the described faucet body in a side of the described radicle opposite with described free end; Auxiliary check valve apparatus has the moveable piston part that is biased into closed position by biasing spring, cooperates with unidirectional valve seat on the radicle at moveable piston part on this closed position; Described piston piece is arranged in the open ended collar tube sub-assembly of the radicle that is fixed in described faucet body; Described long valve driveshaft device can move axially to open described main valve device at first direction, to allow fluid to flow through faucet body from its outlet that enters the mouth, and can on opposite second direction, move axially to close described main valve device, with by fluid flowing from the described described outlet that enters the mouth of faucet body, described long valve driveshaft device keeps described auxiliary check valve apparatus to be shown in an open position at least when described main valve device is shown in an open position, described radicle is included in the reduced diameter section that extends between the external thread section of radicle and the free end, the external diameter of described reduced diameter section is littler than the external diameter of described external thread section, and described unidirectional valve seat is formed on the described reduced diameter section, and an end of described collar tube sub-assembly along described reduced diameter section circumferentially be fixed in described radicle, and be suitable for annex being connected to described collar tube sub-assembly at its relative free open-mouth end place; Wherein, described piston piece comprises closed upper end and the uncovered lower end that can close with described one-way valve seated connection, described piston piece is directed carrying out axial motion and is directed by the outer annular flange of described piston piece in the interior ring-type shoulder of open ended collar tube sub-assembly, described one-way valve bias voltage is arranged at the spring around the described piston piece, described piston piece hollow interior is in the uncovered lower end of described piston piece and the internal fluid communication of described open ended collar tube sub-assembly, and described piston piece is passed at least one hole between the described flange of described piston piece and described closed upper end.

Described unidirectional valve seat forms at the free end of reduced diameter section.

Described biasing spring is arranged in the spring housing, and walks around described spring housing by the fluid flowing passage of described auxiliary check valve apparatus.

Described collar tube sub-assembly is formed with screw thread to allow that annex is connected in described collar tube sub-assembly at its relative free open-mouth end place.

Described main valve device is a reversing valve seat valve device, described long valve driveshaft device when described main valve device is in the closed position and described piston piece spaced apart slightly, make at described long valve driveshaft device when described first direction moves, described main valve device is at first opened, open described auxiliary check valve apparatus subsequently, and at described long valve driveshaft device when described opposite second direction moves, allow described auxiliary check valve apparatus at first to close, close described main valve device subsequently.

The external diameter of described collar tube sub-assembly is less than the smaller diameter end of described tapered thread section.

Seal ring is arranged in the annular groove of outer annular flange of described piston piece.

Description of drawings

Further details of the present invention is described with reference to the accompanying drawings.Wherein:

Fig. 1 shows the longitdinal cross-section diagram of first embodiment of the invention cock;

Fig. 2 shows the longitdinal cross-section diagram of another embodiment of the present invention cock.

Embodiment

Referring to Fig. 1, it has demonstrated the cock of the present invention that is in vertical position, as can be seen, this cock comprises the main valve device 10 of faucet body 1, reverse valve seat formula, auxiliary check valve apparatus 24, operation main valve device 10 and and the valve stem equipment 11 of auxiliary check valve apparatus 24 and the valve rod operation equipment with handling handle 9.

Faucet body 1 has vertically extending longitudinal axis A in Fig. 1.Faucet body 1 has last main part 4a and following radicle 4b.Following radicle 4b has tapered thread section 5, and the diameter of this thread section 5 is downward more more little.Radicle 4b has the reduced diameter section 20 of cylindricality, and it extends downwards from the lower end or the smaller diameter end of tapered thread section 5, and main part 4a oppositely extends upward from the upper end or the larger diameter end of tapered thread section 5.The external diameter of reduced diameter section 20 is less than the minor diameter of tapered thread section 5.For some application, its thread section 5 can be cylindricality.The vertical hole 2 coaxial with longitudinal axis A passes completely through faucet body 1 from top to bottom.Vertically hole 2 has reaming 2a, and it extends the axial shoulder 2c up in main part 4a downwards from the upper end of faucet body 1.Main part 4a also comprises the external thread section 2d of its upper end and the approaching internal thread segment 2e of open end thereon in reaming 2a.Main part 4a also comprises the attachment portion 6 of horizontal expansion, and it has external thread section 7.

The main valve device 10 of reverse valve seat formula is set between the top and bottom of main part 4a, and it comprises annular seal loop device 13, this annular seal loop device 13 by annular seal ring retainer 14 be clamped in reaming 2a axially towards shoulder 2c on.Main valve device 10 also comprises the taper ring-type seat surface 12 up on the valve stem equipment 11, also will be further described below.Seal ring retainer 14 is by locking ring 15 lockings, and this locking ring 15 has the external thread section 15a that cooperates with the internal thread segment 2e of reaming 2a.

In the lower end of cock, auxiliary check valve apparatus 24 is installed on the radicle 4b.This check valve apparatus 24 comprises ball element 25 and volute spring 26, and this volute spring 26 upwards promotes this ball element 25, makes this ball element 25 cooperate hermetically with valve seat 27 surface current bodies on being arranged on reduced diameter section 20 lower ends.Check valve apparatus 24 is in cup-shaped spare 22 under the reduced diameter section 20, and the upper end of described cup-shaped spare 22 has the internal thread 23 that cooperates with the outside thread 21 of reduced diameter section 20.The underpart of cup-shaped spare 22 has hole 29, is used for the fluid inflow and flows out cup-shaped spare 22.

Valve stem equipment 11 comprises first or valve rod top 11-1, the upper end that it passes annular seal ring 13, seal ring retainer 14 and locking ring 15 and stretches out faucet body 1.The underpart 11-2 that has radially chap in the lower end of the valve rod top of valve stem equipment 11 11-1, it is configured in the following of annular seal ring 13 and has taper ring-type seat surface 12 up in the top.Valve stem equipment 11 also comprise second or lower extension divide 11-3, its upper end is received among the hole 11-4 that extends axially and open wide downwards of underpart 11-2 of upper valve rod part 11a chap and is fixing therein.Lower extension divides 11-3 to extend downwardly into radicle 4b and have a lower end from the underpart 11-2 of described chap, when oppositely valve seat formula main valve device 10 is closed, be seat surface 12 on the valve stem equipment 11 during with annular seal ring 13 fluid-tight engagement, described lower end and check valve apparatus 24 are a little up spaced apart.Move down at valve stem equipment 11, when making ring-type seat surface 12 move down to separate with annular seal ring 13, oppositely valve seat formula main valve device 10 is opened.Open in the near future at main valve device 10, lower extension divides the lower end of 11-3 to contact with one-way valve ball element 25, promotes one-way valve ball element 25 and lifts off a seat 27.When valve stem equipment 11 moves when promptly moving upward in the opposite direction, check valve apparatus 24 at first by the biasing force of spring 26 and jar in hydrodynamic pressure close, main valve device 10 is also closed subsequently.

Valve stem equipment 11 by handle 9 longitudinally axis A move up and down.Handle 9 has the internal thread segment 8 that cooperates with the outside thread of valve body 1 upper end.This handle 9 is installed on the 11-1 minor diameter upper end portion 11-5 of valve rod top, is used for valve stem equipment 11 is freely rotated.Handle 9 is installed on the valve stem equipment 11, rotating and because the mating reaction of handle internal thread and the outside thread 2d of faucet body 1 upper end when moving up and down with respect to faucet body 1 around axis A when handle 9, valve stem equipment 11 moves at axial both direction with handle 9.Handle 9 is axially fixed on the valve stem equipment 11 between lower support ring 9a and the nut part 9b, described lower support ring 9a cooperates with the shoulder up of valve rod top 11-1, and described nut part 9b is installed on the minor diameter upper end portion 11-5 of valve rod top 11-1 by screw thread.Packing ring 9a ', the 9b ' that reduces to rub is installed between supporting member 9a and the handle 9 respectively and between nut part 9b and the handle 9.

Two

seal ring

16A and 16B are installed between valve rod top 11-1 and the locking ring 15.Seal ring 16C is installed between valve rod top 11-1 and the annular seal ring retainer 14.Another seal ring 16D is installed between locking ring 15 and the reaming 2a inwall, and another seal ring 16E is installed between the external peripheral surface and reaming 2a inner circumferential surface of retainer 14.

Fluid passage 28 forms in vertical hole 2 and extends to annular seal ring 13 from the underpart 11-2 of the chap of the faucet body inlet I of reduced diameter section 20 lower ends of the radicle 4b that divides 11-3 around the lower extension of valve stem equipment 11 and valve rod top 11-1.Another fluid passage 3 forms in the attachment portion 6 of horizontal expansion and extends to reaming 2a above the annular seal ring 13 from faucet body outlet O, and be communicated with annular channel 19 by the circumferentially spaced hole 18 that forms in seal ring retainer 14, described annular channel 19 forms in retainer 14 by the reduced diameter section that forms on the valve rod top 11-1 above the 11-2 of the underpart of radially chap.

When main valve device 10 is opened,

passage

28 and 3,19 fluid communication with each other, and when check valve apparatus 24 was also opened, gas or liquid were realized the fluid discharge mode or are realized that in the opposite direction jar adds injection-molded through cock from inlet I to outlet O.When main valve device 10 was closed,

passage

28 and 3,19 separated each other.Then check valve apparatus 24 is closed, by cock flowing by gas or liquid.

Thus, can see that check valve apparatus 24 is positioned under the reduced diameter section 20 and at radicle 4b bottom, under the situation that shearing plane shown in Figure 1 is cut off, the check valve apparatus 24 of the radicle 4b foot office in remaining on tank body screw thread faucet hole keeps in full force and effect at faucet body 1.Auxiliary check valve apparatus 24 has certain interval downwards and is positioned at described tank body apart from shearing plane, makes that at faucet body 1 it can not suffer damage or be out of shape when shearing plane is cut off.If owing to made tap body do not cut off in the external force that is applied to outside the jar on the faucet body, and just because the effect of this power produces distortion, auxiliary check valve apparatus 24 would still keep in full force and effect.But, cut off or during lateral deformation at the 4a of tap body portion, when thread section 5 produced distortion owing to effect big pulling capacity thereon, the reduced diameter section 20 that auxiliary check valve apparatus 24 is installed did not directly contact with tank body, and its reduced diameter section 20 can not be out of shape thus.If reduced diameter section 20 is indeformable, its auxiliary check valve apparatus 24 is still remained valid with hermetically closing jar hole.

Referring to Fig. 2, it demonstrates another embodiment of the cock of the present invention that is in vertical position.At this, the difference of cock and Fig. 1 embodiment cock of Fig. 2 is only described.At first, show the neck end of jar C in Fig. 2, faucet body radicle 50 cooperates thereon.

The auxiliary one-way valve 60 of modification is installed in the open ended sleeve pipe 62, and this sleeve pipe is fixed on the minor diameter bottom 50a of radicle 50.One-way valve 60 comprises movably unidirectional valve member, and it is configured under the reduced diameter section 50a and comprises the piston piece 64 with piston skirt, and the external diameter of its piston skirt is less than the internal diameter of sleeve pipe 62.Piston piece 64 has the unlimited lower end 64-1 and the upper end 64-2 of sealing, and the upper end 64-2 of this sealing can be resisted against on the valve seat surface of reduced diameter section 50a lower end formation.Piston piece 64 promotes towards valve seat surface by screw stud spring 67, and described screw stud spring 67 is configured between the ring-type shoulder 69 and piston piece 64 outward extending collar flanges 68 that sleeve pipe 62 extends to the inside.Piston piece 64 is directed carrying out axially moving in sleeve pipe 62 and being directed by annular piston flange 68 in the ring-type shoulder 69 that extends to the inside of sleeve pipe 62.It should be noted that spring housing does not form the part of one-way valve 60 fluid passages, in other words, described spring housing gets around the fluid passage of one-way valve 60.Piston piece 64 has at least one and best a plurality of hole 66 between the upper end 64-2 of sealing and collar flange 68, make the inside of piston piece 64 be connected with outside under the closed upper end 64-2.The lower end of sleeve pipe 62 has the internal thread that is used to connect the plunger tube (not shown), and the sleeve pipe upper end has internal thread, is used for being connected with the outside thread of reduced diameter section 50a.

In another embodiment, spring 67 can be arranged in the piston skirt, and this piston skirt has axial fluid passage at its outer surface.

Fig. 2 embodiment is also that with the different of Fig. 1 embodiment valve stem equipment 111 has the upper valve rod part 111A integrally formed with lower valve rod part 111B.In addition, oppositely the annular seal device 94 of valve seat formula main valve device 54 is arranged on the valve stem equipment 111, and the ring valve seat surface 96 of main valve device 54 is arranged on the fixing tubular seat part 76 around valve stem equipment 111, this fixedly base spare be equivalent to Fig. 1 embodiment seal ring retainer 14.

In order to prevent that fluid from leaking along the upper valve rod part 111A of valve stem equipment 111, is provided with sealing configuration 78 in ring-type valve base piece 76.The sealing structure is known, no longer is further described at this.In addition,

seal arrangement

71,72,73 is set, prevents around ring-type valve base piece 76 with along the leakage of the reaming 52-1 inner peripheral surface in the main valve body 52.

Another set valve rod operation equipment comprises handle 84, and it has axial columns fixed thereon 75.This post 75 is axially aimed at valve stem equipment 111 and is connected with it by connection set 74, so that post 75 rotates with respect to moving axially of valve stem equipment 111.Ring-type or tubular valve base piece 76 are by ring-type locking ring 80 location of the upper end that is threaded in reaming 52-1 and then by cock cap 82 location that can be threaded onto on main valve body 52 outer surfaces.Post 75 has thread section, and it cooperates with thread section 82 on the ring-type locking ring 80.When handle 84 rotated in an opposite direction, it moved up and down and gives valve stem equipment 111 with this transmission of movement, and it is moved axially.

Do not open the internal thread of the operation equipment of assisting one-way valve 60 except radicle 50 has faucet body to be used to admit when the shearing plane of Fig. 2 is cut off, Fig. 2 embodiment's others are identical with Fig. 1 embodiment.

Though, more than describe two different embodiments of the present invention in detail, it will be understood, in the scope of the invention and design scope, can carry out various modifications and distortion.For example, can adopt other valve rod operation equipment, for example surge, pneumatic or electronic device.The reduced diameter section 20a of Fig. 1 and the reduced diameter section 50a of Fig. 2 can also be longer again, and one-way valve is arranged in the described reduced diameter section.One-way valve seat 27 (Fig. 1) face can be positioned at part 20 or 50a the opposite end the centre and not on its free end.

Claims

1. the cock of gas or liquid tank comprises:

Faucet body with radicle, described radicle has free end and external thread section, and this external thread section is suitable for being bonded in the tapped hole of gas or liquid tank;

Be installed in the valve stem equipment in the described faucet body, described valve stem equipment has longitudinal axis;

The main valve device is arranged in the described faucet body in a side of the described radicle opposite with described free end;

Auxiliary check valve apparatus has the moveable piston part that is biased into closed position by biasing spring, cooperates with unidirectional valve seat on the radicle at moveable piston part on this closed position; Described piston piece is arranged in the open ended collar tube sub-assembly of the radicle that is fixed in described faucet body;

Described valve stem equipment can move axially to open described main valve device at first direction, to allow fluid to flow through faucet body from its outlet that enters the mouth, and can on the second direction opposite, move axially to close described main valve device with first direction, with by fluid flowing from the described described outlet that enters the mouth of faucet body, described valve stem equipment keeps described auxiliary check valve apparatus to be shown in an open position at least when described main valve device is shown in an open position

It is characterized in that, described radicle also is included in the reduced diameter section that extends between the external thread section of radicle and the free end, the external diameter of described reduced diameter section is littler than the external diameter of described external thread section, and described unidirectional valve seat is formed on the described reduced diameter section, and an end of described collar tube sub-assembly along described reduced diameter section circumferentially be fixed in described radicle, and be suitable for annex being connected to described collar tube sub-assembly at the relative free open-mouth end place of described collar tube sub-assembly;

Wherein, described piston piece comprises closed upper end and the uncovered lower end that can close with described one-way valve seated connection, described piston piece is directed carrying out axial motion and is directed by the outer annular flange of described piston piece in the interior ring-type shoulder of open ended collar tube sub-assembly, described auxiliary check valve apparatus bias voltage is arranged at the spring around the described piston piece, described piston piece hollow interior is in the internal fluid communication of the uncovered lower end of described piston piece and open ended described collar tube sub-assembly, and described piston piece is passed at least one hole between the described flange of described piston piece and described closed upper end.

2. cock as claimed in claim 1 is characterized in that: described unidirectional valve seat forms at the free end of reduced diameter section.

3. cock as claimed in claim 1 is characterized in that: described biasing spring is arranged in the spring housing, and walks around described spring housing by the fluid flowing passage of described auxiliary check valve apparatus.

4. cock as claimed in claim 1 is characterized in that: described collar tube sub-assembly is formed with screw thread to allow that annex is connected in described collar tube sub-assembly at its relative free open-mouth end place.

5. cock as claimed in claim 1, it is characterized in that: described main valve device is a reversing valve seat valve device, described valve stem equipment when described main valve device is in the closed position and described piston piece spaced apart slightly, make at described valve stem equipment when described first direction moves, described main valve device is at first opened, open described auxiliary check valve apparatus subsequently, and at described valve stem equipment when described opposite second direction moves, allow described auxiliary check valve apparatus at first to close, close described main valve device subsequently.

6. cock as claimed in claim 1 is characterized in that: the external diameter of described collar tube sub-assembly is less than the smaller diameter end of described external thread section.

7. cock as claimed in claim 1 is characterized in that: seal ring is arranged in the annular groove of outer annular flange of described piston piece.