CN100453886C

CN100453886C - Gas cylinder valve shutting device

Info

Publication number: CN100453886C
Application number: CNB2006100262476A
Authority: CN
Inventors: 庄加保
Original assignee: Semiconductor Manufacturing International Shanghai Corp
Current assignee: Semiconductor Manufacturing International Beijing Corp
Priority date: 2006-04-29
Filing date: 2006-04-29
Publication date: 2009-01-21
Anticipated expiration: 2026-04-29
Also published as: CN101063511A

Abstract

The invention discloses an air-bottle shutoff valve, comprising a group of clamping claws that can clamp the air-bottle valve and rotate with respective to the air-bottle axis, a signal mechanism connected with the group of clamping claws, a draught spring connected with a drag-line rolled on the mechanism, wherein the signal mechanism is composed of a well base wheel for rolling the drag-line, a ratchet wheel fixed on the well base wheel, an arresting stop clamped by the ratchet wheel, an air chamber with an airway which is connected with a magnetic valve in the air collector provided with a moveable signal piston that is connected with the arresting stop by a connecting rod. The invention is applicable to the air collector with magnetic valve and air-detector and arranged on the air-bottle valve, the clamping claws of which can turn the air-bottle valve to shut off the air-bottle valve automatically to keep the safety of apparatus and persons once the gas in the air collector leaks.

Description

Gas cylinder valve shutting device

Technical field

The present invention relates to a kind of valve configurations of pressurized container, particularly a kind of self-closing device of gas cylinder.

Background technique

In industries such as semiconductor, liquid crystal manufacturings, usually need to use various high-pure gas in the production, these gases are poisonous or inflammable and explosive mostly, generally be contained in the gas cylinder, and gas cylinder is placed in the gas holder.

When the gas cylinder in the gas holder takes place to leak, must manage to close as early as possible gas cylinder valve with assurance personnel and device security.Common way is to utilize gas detecting machine to survey at present, if detect gas leakage, gas detecting machine will send signal, and the pneumatic valve in the gas holder directly cuts out, and causes adverse consequences thereby avoid gas further to leak.

Because of pneumatic valve comparatively expensive; so in traditional gas holder; pneumatic valve generally directly is not installed on the gas cylinder; leak the pneumatic valve in like this from the gas cylinder mouth to gas holder; when not connecting as joint, though can close the pneumatic valve of gas holder, gas cylinder valve can't be closed automatically; gas cylinder is still leaking, and the staff of portable compressed air breathing apparatus of only reliable wearing (SCBA) and so on protection equipment enters gas holder and removes to close gas cylinder valve.And in gas cylinder, adorn such as diborane, the dangerously explosive special gas of this class of silane, when it takes place to leak, close gas cylinder valve if enter gas holder by the staff, jeopardize the blast of staff's safety probably, therefore must use pneumatic valve on each gas cylinder, the source from gas cylinder when taking place to guarantee to leak cuts off the gas leakage approach, if but each gas cylinder is all installed pneumatic valve, cost can be very high.

Summary of the invention

The technical problem to be solved in the present invention provides a kind of gas cylinder valve shutting device that can close gas cylinder valve when gas cylinder takes place to leak automatically.

For solving the problems of the technologies described above, a kind of gas cylinder valve shutting device of the present invention, comprise one group can hold tightly gas cylinder valve and can around the holding claw of gas cylinder valve rotational, fixedly connected with this group of holding claw have signaling gear, a draught spring that chock also can rotate when gas cylinder leaks, this draught spring links to each other with a drag-line, and this drag-line is wound on this signaling gear; Described signaling gear comprises and can take turns for the recessed edge that this drag-line is reeled that one is fixed on the ratchet on this recessed edge wheel, a chock that touches with this ratchet card; Solenoid valve in an air chamber that comprises air pipe, this air pipe and gas holder is connected the ccontaining one signal piston that can slide in this air chamber within it; This signal piston is connected with this chock by a connecting rod.

The present invention can be used for having in the gas holder of solenoid valve and gas detecting machine, be installed on the gas cylinder valve, in case gas leakage takes place in the gas holder, the gas detecting machine of gas holder itself will send a signal, close gas holder, solenoid valve in the gas holder is sent to air chamber by air pipe and is sent pressed gas, after inflating in the air chamber, the driving signal piston slides in air chamber, unclamp ratchet thereby drive chock, after ratchet was released, draught spring can rotate by the recessed edge wheel of drag-line tractive, rotate thereby drive the holding claw of holding gas cylinder valve tightly, gas cylinder valve is closed in final realization automatically.

Description of drawings

Fig. 1 adopts the gas cylinder that the device that is provided is provided to place the schematic representation of gas holder;

Fig. 2 is the schematic representation of one embodiment of the invention, and it is the view of C-C direction among Fig. 1;

Fig. 3 is the generalized section of one embodiment of the invention;

Fig. 4 is the signaling gear schematic representation of one embodiment of the invention, and it is the view of E-E direction among Fig. 1;

Fig. 5 is the schematic representation of handle in the one embodiment of the invention;

Fig. 6 is the schematic representation of limiting stopper in the one embodiment of the invention;

Embodiment

The present invention is further detailed explanation below in conjunction with accompanying drawing.

Fig. 1 is that gas cylinder 20 is placed on the schematic representation in the gas holder 10 with gas detecting machine and solenoid valve, and gas cylinder valve shutting device 30 of the present invention is installed on the gas cylinder 20.

Gas cylinder valve shutting device 30 of the present invention comprises that mainly can be held tightly a gas cylinder valve 22 and can be around the holding claw 302 of gas cylinder valve 22 rotational, signaling gear 33, a draught spring of fixedlying connected with this group of holding claw 302, this draught spring 37 links to each other with a drag-line 34, this drag-line 34 is wound on this signaling gear 33, as shown in Figure 2; This signaling gear 33 comprises 332, one chocks 333 that touch with these ratchet 332 cards of ratchet that can be fixed on for the recessed edge wheel 331, that this drag-line 34 is reeled on this recessed edge wheel 331; Solenoid valve in an air chamber 339 that comprises air pipe 335, this air pipe 335 and gas holder is connected the ccontaining one signal piston 337 that can slide in this air chamber 339 within it; This signal piston 337 is connected with this chock 333 by a connecting rod 334, as shown in Figure 4.

In case in the gas holder 10 gas leakage takes place, gas holder 10 gas detecting machines own will send a signal, close gas holder, solenoid valve in the gas holder is sent to air chamber 339 by air pipe 335 and is sent pressed gas, after inflating in the air chamber 339, driving signal piston 337 slides in air chamber 339, thereby drive chock 333 and unclamp ratchet 332, after ratchet 332 is released, draught spring 37 can rotate by the recessed edge wheel 331 of drag-line 34 tractives, rotate thereby drive the holding claw 302 of holding gas cylinder valve 22 tightly, gas cylinder valve 22 is closed in final realization automatically.

For draught spring 37 is worked in the mode of easier control, among more excellent embodiment of the present invention draught spring 37 is placed in the U-shaped pipe 32 of a both ends open, be connected with a damper piston 36, and be connected with described drag-line 34 by this piston 36; On these drag-line 34 paths a pulley 35 is set, this drag-line 34 posts on pulley 35; At the opening of these U-shaped pipe 32 1 ends one stop block 38 that is fixed in the band pore of this U-shaped pipe 32 is set, described draught spring 37 is fixed on the stop block 38, as shown in Figure 2.In this embodiment, under the state that gas cylinder valve 22 is opened, drag-line 34 major parts are wound onto on the recessed edge wheel 331, draught spring 37 is tensioned and fills most of section at the U-shaped pipe, when signaling gear 33 is received signal, after ratchet 332 was released, draught spring 37 was contracted to an end of U-shaped pipe 32, because of the existence of damper piston 36, draught spring 37 can shrink more lenitively in its contraction process; But fixing draught spring 37 1 ends of stop block 38 blocks of band pore are set, and when being convenient to damper piston 37 pressurized air, air discharge U-shaped pipe 32.

For making holding claw 302 can hold gas cylinder valve 22 more steadily tightly, also comprise a push rod 303 and a jacking block 305 that is fixed on this push rod 303 and holds out against gas cylinder valve that links together with holding claw 302 in a preferred embodiment of the present invention; Push rod 303 is rabbeting on a shell block 31 around the mode of gas cylinder valve rotational, and a pawl seat 307 is fixed on this push rod 303, and holding claw 302 is hinged on this pawl seat 307; One can hold out against this pawl seat 307 along flexible tension spring 306 1 ends of these push rod 303 axis, and the other end holds out against a limiting stopper 304, and this limiting stopper 304 slidably slips and holds holding claw 302 tightly, as shown in Figure 3.In this embodiment, tension spring 306 holds out against limiting stopper 304, makes limiting stopper 304 hold holding claw 302 tightly, to guarantee that holding claw 302 can not unclamped gas cylinder valve 22 in the process that screws gas cylinder valve 22; If make holding claw 302 decontrol gas cylinder valve 22, as long as limiting stopper 304 is up lifted.The shape of limiting stopper 304 can be made as shown in Figure 6, and correspondingly the quantity of holding claw is four.

Be provided with an integrally formed handle 301 in one embodiment of the invention, be connected to push rod 303 tops, six prismatics are made in the end 3108 of handle 301, make the groove of a respective shapes on the push rod 303 and can realize clamping; Be right after end 3108 draw-in groove 3107 is set, these draw-in groove 3107 upper ends are provided with a card section 3106; Be provided with on the shell block 31 one can with the fixture block 309 of this card section 3106 clampings, the circumscribed circle diameter of this draw-in groove 3107 is less than these fixture block 309 inscribed circle diameters, the height of this draw-in groove 3107 is greater than the thickness of this fixture block 309; These card section 3106 upper ends are provided with a catch 3105, and catch 3105 upper ends are provided with a locating slot 3104, and these locating slot 3104 upper ends are provided with handlebar 3103, and the handlebar upper end is provided with holds end 3102; One dismountable location piece 308 is set on shell block 31, and this location piece 308 embeds in locating slots 3104, and this locating slot 3104 highly deducts this location piece 308 and embeds the difference of thickness of the part in locating slots 3104 greater than the height of this card sections 3106.In this embodiment, gas cylinder valve 22 is closed, after operator enter gas holder 10, if want to fasten or unclamp gas cylinder valve 22, then can hold end 3102 handle 301 mentioned certain altitude, make card section 3106 break away from fixture blocks 309, and make draw-in groove 3107 parts be positioned at fixture block 309 relevant positions, handle 301 is just free to rotate, and at this moment handle with sleeve 301 can switch gas cylinder valve 22.

Position regulation frame 40 among Fig. 4 and Fig. 1 can be used to adjust the position of gas cylinder valve shutting device 30, is convenient to gas cylinder valve shutting device 30 and aims at when loading and unloading or disengaging gas cylinder valve 22, and its meaning is very bright, and is superfluous.

Adopt gas cylinder valve shutting device provided by the invention, close gas cylinder valve automatically when gas cylinder that can be in gas holder takes place to leak, not only can reduce cost, can also prevent to blast in the gas holder, thus support facility and personal safety.

Claims

1, a kind of gas cylinder valve shutting device, it is characterized in that, comprise one group can hold tightly gas cylinder valve and can around the holding claw (302) of gas cylinder valve rotational, fixedly connected with this one group of holding claw (302) have signaling gear (33), a draught spring (37) that chock also can rotate when gas cylinder is revealed, this draught spring (37) links to each other with a drag-line (34), and this drag-line (34) is wound on this signaling gear (33); Described signaling gear (33) comprises and can take turns (331) for the recessed edge that this drag-line (34) is reeled that one is fixed on the ratchet (332) on this recessed edge wheel (331), a chock (333) that touches with this ratchet (332) card; Solenoid valve in an air chamber (339) that comprises air pipe (335), this air pipe (335) and gas holder is connected the ccontaining one signal piston (337) that can slide in this air chamber (339) within it; This signal piston (337) is connected with this chock (333) by a connecting rod (334).

2, gas cylinder valve shutting device according to claim 1, it is characterized in that, described draught spring (37) is placed in the U-shaped pipe (32) of a both ends open, is connected with a damper piston (36), and is connected with described drag-line (34) by described damper piston (36); On this drag-line (34) path a pulley (35) is set, this drag-line (34) posts on pulley (35); At the opening of these U-shaped pipe (32) one ends one stop block (38) that is fixed in the band pore of this U-shaped pipe (32) is set, described draught spring (37) is fixed on the stop block (38).

3, gas cylinder valve shutting device according to claim 1 is characterized in that, also comprises a push rod (303) and a jacking block (305) that is fixed on this push rod (303) and holds out against gas cylinder valve that links together with described holding claw (302).

4, gas cylinder valve shutting device according to claim 3, it is characterized in that, described push rod (303) is rabbeting on a shell block (31) around the mode of gas cylinder valve rotational, a pawl seat (307) is fixed on this push rod (303), and described one group of holding claw (302) is hinged on this pawl seat (307); One can hold out against this pawl seat (307) along flexible tension spring (306) one ends of this push rod (303) axis, and the other end holds out against a limiting stopper (304), and this limiting stopper (304) slidably slips and holds described holding claw (302) tightly.

5, gas cylinder valve shutting device according to claim 4, it is characterized in that, described push rod (303) top clamping one handle (301), described handle one end have one can with the end (3108) of this push rod (303) clamping, upper end, this end (3108) is provided with a draw-in groove (3107), and this draw-in groove (3107) upper end is provided with a card section (3106); Be provided with on the described shell block (31) one can with the fixture block (309) of this card section (3106) clamping, the circumscribed circle diameter of this draw-in groove (3107) is less than this fixture block (309) inscribed circle diameter, the height of this draw-in groove (3107) is greater than the thickness of this fixture block (309); This card section (3106) upper end is provided with a catch (3105), and catch (3105) upper end is provided with a locating slot (3104), and this locating slot (3104) upper end is provided with handlebar (3103), and the handlebar upper end is provided with holds end (3102); One dismountable location piece (308) is set on described shell block (31), this location piece (308) embeds in the locating slot (3104), and this locating slot (3104) highly deducts this location piece (308) and embeds the difference of thickness of the part in the locating slot (3104) greater than the height of this card section (3106).