KR20110006515A - Automatic gas shut-off apparatus and valve assembly for lpg container having the same - Google Patents

Abstract

PURPOSE: An automatic gas cutoff device and a valve assembly for an LPG container using the same are provided to prevent a gas leak by simplifying the structure of components. CONSTITUTION: An automatic gas cutoff device comprises a housing body(410), a check valve(420), a check seat(430), and return springs(450). The housing body has first, second, third, and fourth inner parts with first, second, and third retaining protrusions. The check valve is slidably formed along the inner parts of the housing body in a pipe shape and has a gas flow hole(421). The check seat blocks gas flow. The return springs are formed between the third inner part of the housing body and the second outer surface of the check valve.

Description

Automatic Gas Shut-off Apparatus and Valve Assembly for LPG Container having the same}

The present invention relates to an automobile shut-off device and a valve device for a separable functional LLP container employing the separable unit, and more specifically, to connect a separate charger to the container valve for gas filling to the LPG container. In this case, the gas flow passage is opened relatively wide, which increases the filling amount of gas, thereby increasing the work efficiency. It relates to a valve device for a shut-off type Elbow container.

In general, the LPG container in which the LLP is stored is used in homes and restaurants, etc., the valve device is coupled to the top, one end is connected to the hose connected to the gas device, such as a gas range, the other end to the valve device for the LLP container, the other end The charger is coupled to charge the LPG gas or the pressure regulator is connected to control the amount and pressure of the LPG supplied from the LP container to the gas machine.

As such, when the charger or the pressure regulator is coupled to the LPG container, a flow path is formed to supply gas, and when the charger or the pressure regulator is separated from the ELP container, the gas flow is automatically blocked to prevent the outflow of gas. The need for shut-off devices has emerged.

Referring to Figure 1, it will be described a valve device having a conventional shut-off function for the LLP container disclosed in Korea Patent No. 10-0617955.

Referring to FIG. 1, a conventional valve device includes a boss part 41 fixed to an inner wall surface of a discharge part 12 and a boss partly inserted into the boss part 41 and slidingly moving in the boss part 41. Together with the portion 41, a slider 42 for selectively opening and closing the second flow passage 15b and a return spring 51 for returning the slider 42 to the original position are provided.

The slider 42 is formed in a tubular body according to its position and is formed at the end of the body portion 43 and the boss portion 41 and the body portion 43 having the first gas movement hole 46 formed therein. It has a head 44 for opening and closing the second flow path (15b) and a plurality of second gas moving holes 47 formed between the body portion 43 and the head 44 in contact.

According to the conventional valve device, when the charger 3 is not coupled, the head 44 of the slider 42 and the inclined surfaces 48a and 48b of the boss 41 are mutually contacted by the elastic force of the return spring 51. do. Therefore, since the second passage 15b is in a closed state, the gas does not move through the second passage 15b.

Then, when the charger 3 is coupled for gas charging, when the charger 3 is inserted into the discharge part 12, the insertion end of the charger 3 pushes the body 43 of the slider 42. Then, as the return spring 51 is compressed, the slider 42 is moved to the inside of the valve device, and the second gas moving hole 47 is exposed between the boss part 41 and the head 44. The flow path is formed.

When the gas is charged through the charger 3 in such a coupled state, the gas is a large amount through the large volume of the first gas moving hole 46 formed in the entire inner region of the body portion 43 of the slider 42. After this flows, it is moved to the second flow path 15b through the plurality of second gas movement holes 47, and then filled into the LLP container.

When the filling of gas is completed, the charger 3 is removed from the container valve. Then, the slider 42 is returned to its original position by the return spring 51, and the inclined surfaces 48a and 48b of the head 44 and the boss portion 41 are sealed by the sealing member 49a while contacting each other. Arbitrary discharge of gas is prevented.

The conventional valve device described above may cause a problem of gas leakage such that the boss portion 41 is separated or the O-ring 49b is worn according to the working method, and the eccentric is caused by the fastening of the O-ring 49a. Or assembling may cause a problem, and since the sealing member 49 is in line contact, there is a problem of inferior airtightness.

If the user couples the pressure regulator to the valve device for the use of elbow, gas leakage may occur in the case of a regulator without packing. In the case of a regulator with a packing, it is described that the body portion 43 can be moved to form the flow path 47 after being seated on the sealing surface to maintain airtightness, but the construction thereof is not disclosed, and thus operation was impossible.

Here, if the flow path 47 is formed by pushing the body portion 43 by the end of the pressure regulator, and there is a possibility of leakage before sealing, if there is a seal. On the other hand, even if the packing is seated on the actual surface and the airtight is maintained, the packing is made of rubber, so the amount of movement of the body 43 is small, so that the flow path 47 is minutely secured, and thus the amount of gas flow is very small.

Moreover, the body portion 43 is structured to be operated by the compression of the return spring 51, but there is no stop device at the time of movement, since it depends on the elasticity of the return spring 51, the moving position of the body portion 43 is constant It was difficult to secure the same flow path because it could not be established and the gas flow was fluid due to the strength of the worker's power.

On the other hand, Korean Patent Laid-Open No. 10-2009-0010778 proposes an automobile shut-off device and a valve assembly for an LLP container by the present applicant.

Referring to FIG. 2, the valve assembly 100 for an LLP container may automatically cut off and open a flow path according to a connection of a charging adapter without a separate handle 11. ).

The valve assembly 100 for an LPI container includes a body 110, a container fastening part 50 formed at a lower side of the body 110, a charging part 120 formed at both sides of the body 110, and an LPG safety discharge part ( 30 and a handle 11 rotatably coupled to the upper portion of the body 110 to open and close the flow path between the container fastening portion 50 and the charging portion 120 as the user rotates.

The body 110 is formed with a flow path therein, the lower side of the body 110 is formed with a container fastening portion 50 is coupled to the valve coupling hole formed on the upper end of the LPG container, one side of the body 110 The protrusion 120 is formed therein is a charging unit 120 has a built-in shut-off device 200, and the LPG safety discharge portion 30 protruding to the other side of the body 110 is formed.

Here, the shut-off device 200 is inserted into the inner peripheral surface of the charging unit 120 to automatically open and block the flow path inside the body in accordance with the connection of the charging adapter, check body 210 and the check body 210 It is coupled to the check valve 220 and the check body 210 is inserted into the inner circumferential surface and elastically supports the check valve 220, and provides a restoring force to return to the original position after the pressure movement of the check valve 220 during charging The return spring 250 includes a check seat 230 coupled with a packing 235 fixedly coupled to an end of the check valve 220.

 By the way, in the conventional vehicle blocking device, a spring guide 212 protrudes from the inner circumferential surface of the check body 210 so that a spring insertion groove (not shown) into which the return spring 250 is inserted is formed, and the check body 210 is formed. The support jaw 211 is formed in the arc-shaped groove (not shown) in the inner direction so that the gas flows smoothly along the gas flow hole 221 of the check valve 220 when the gas filling the processing of each accessory This is hard.

In addition, the shut-off device 200 is kept airtight by the two O-rings (215, 225), the O-ring between the check valve 220 and the check body 210 is insufficient may cause problems such as gas leakage.

The conventional valve assembly described above may cause assembly due to eccentric leakage and difficulty in assembly by assembling many accessories having concentricity. In addition, since the range in which the check valve operates is determined by the elasticity of the spring, there is a problem that it is difficult to keep the gas flow path constant when the spring is twisted or overlapped.

Accordingly, it is an object of the present invention to provide an automobile shut-off device capable of preventing gas leakage due to its simple structure and excellent rigidity, assemblability and airtightness, and a valve function for a shut-off type Elbow container which is detachably adopted. .

Another object of the present invention is to provide a shut-off device capable of securing the same flow path and a valve function for a shut-off type Elbow container which is separably employed by having a step portion limiting a moving distance of a check valve when opening and closing a flow path. .

Another object of the present invention is to change the shape and configuration of the parts to improve the operability and assembling to move only the check valve itself when the flow path is opened and closed so that the interference does not occur even in the long-term use excellent durability It is an object of the present invention to provide a valve device for a shut-off type Elbow container which is detachably adopted.

According to an aspect of the present invention for achieving the above object, it is coupled to the gas filling / discharging portion of the valve device for gas container is automatically connected to the gas charging / discharging portion in accordance with the coupling of the filling adapter or pressure regulator In the shut-off device for blocking by the first, made of a tubular shape, the front end portion of the outer peripheral portion is inserted and coupled to the charging / discharging portion, the inner peripheral portion of the inner diameter is gradually reduced so as to have the first to third engaging jaw on the inner circumferential surface A housing body having a fourth inner circumference and having a supporting jaw extending in a center direction of the inner side of the fourth inner circumference; A first outer circumferential surface and a first outer circumferential surface formed of a tubular shape slidable along the inner circumferential portion of the housing body, the outer circumferential portion sealing along the second inner circumferential portion while moving along the second inner circumferential portion of the housing body. A check valve having a second outer circumferential surface whose outer diameter is set to be minutely spaced from the fourth inner circumferential portion through the stepped portion, and having at least one gas flow hole communicating with the inside of the body of the valve device from the inner circumferential portion at an inner end thereof. ; A check sheet installed at an inner end of the check valve to block gas flow through the gas flow hole when the inner surface is in intimate contact with the support jaw; And a return spring received between the third inner circumferential portion of the housing body and the second outer circumferential surface of the check valve, the leading end being in contact with the third catching jaw, and the rear end being in contact with the stepped portion. When the charging adapter or the pressure regulator is coupled to the inner circumference, the check valve is slidably moved until the step portion contacts the second locking jaw of the housing body, so that the sealing state between the support jaw of the check valve and the check seat is released. When the charging adapter or the pressure regulator is separated, the check valve is slid outward by the restoring force of the return spring, so that the check jaw and the check seat of the check valve are set to a sealing state. .

The housing body and the charge / discharge unit are coupled by a coupling O-ring to be in close contact with the metal touch to maintain airtightness.

It further includes an injection packing on one side of the check sheet for the air tight contact with the support of the housing body.

Between the outer circumferential surface of the check valve and the inner circumferential surface of the housing body is coupled by an insertion O-ring.

The housing body and the charging / discharging part have a structure that is fixed by a stop pin to prevent loosening after being partially inserted and coupled by the coupling O-ring.

The housing body and the charging / discharging part have a structure fixed by the stop ring to prevent loosening after being partially inserted and coupled by the coupling O-ring.

According to another aspect of the present invention, there is provided a gas filling / discharging portion on one side of the flow path, the valve body coupled to the gas container on the other side, and built in the gas filling / discharging portion, depending on whether the charging adapter or pressure regulator is coupled It is composed of a shut-off device for automatically blocking the flow path, the shut-off device is made of a tubular shape, the front end portion of the outer peripheral portion is inserted and coupled to the charging / discharging portion, the inner peripheral portion of the first to third engaging jaw on the inner peripheral surface A housing body having first to fourth inner circumferential parts whose inner diameter decreases in steps so as to have a diameter, and a supporting jaw extending in the center direction on an inner side of the fourth inner circumferential part; A first outer circumferential surface and a first outer circumferential surface formed of a tubular shape slidable along the inner circumferential portion of the housing body, the outer circumferential portion being sealed along the second inner circumferential portion while moving along the second inner circumferential portion of the housing body. A check valve having a second outer circumferential surface whose outer diameter is set to be minutely spaced from the fourth inner circumferential portion through the stepped portion, and having at least one gas flow hole communicating with the inside of the body of the valve device from the inner circumferential portion at an inner end thereof. ; A check sheet installed at an inner end of the check valve to block gas flow through the gas flow hole when the inner surface is in intimate contact with the support jaw; And a return spring received between the third inner circumferential portion of the housing body and the second outer circumferential surface of the check valve, the leading end being in contact with the third catching jaw, and the rear end being in contact with the stepped portion. When the charging adapter or the pressure regulator is coupled to the inner circumference, the check valve is slid until the step portion contacts the second catching jaw of the housing body so that the sealing state between the supporting jaw of the check valve and the check seat is released. When the filling adapter or the pressure regulator is separated, the check valve is slid outward by the restoring force of the return spring so that the valve device for the LPG container is set to a sealing state between the support jaw and the check seat of the check valve. to provide.

Therefore, in the present invention, the structure of the accessories is simple and robust, excellent in assembly and airtightness to provide an effect that can prevent gas leakage.

In addition, the present invention has a stop surface to allow the check valve to move a certain distance when opening and closing the flow path can ensure the same flow path.

Furthermore, in the present invention, even when the flow path is opened and closed by changing the shape and configuration of the parts to improve the operability and assemblage, the interference does not occur even in the long-term use provides excellent durability.

Hereinafter, with reference to the accompanying Figures 3 to 9 will be described in detail a preferred embodiment of the present invention.

3A and 3B are a perspective view and an exploded perspective view showing the valve device for an LLP container according to the present invention, Figure 4 is a cross-sectional view of the valve device for an LLP container shown in Figure 3A.

FIG. 5 is an enlarged cross-sectional view illustrating an enlarged cutoff device of FIG. 4, and FIG. 6 is a cross-sectional view illustrating a gas flow in an open state of the check valve in the cutoff device of FIG. 5.

7 is a cross-sectional view illustrating an o-ring structure for sealing the shutoff device of FIG. 5 to a valve device, and FIGS. 8 and 9 are cross-sectional views illustrating other embodiments for sealing the shutoff device to a valve device.

Referring to FIGS. 3A and 3B, the valve device 300 for an LLP container according to the present invention automatically has a flow path 12 depending on whether a charging adapter (not shown) is connected without a separate handle 11. 4) is coupled to the car blocking device 400 can be blocked and opened.

The valve device 300 for an LPI container may include a body 310, a container fastening portion 50 formed at a lower side of the body 310, a coupling part 320 formed at one side of the body 310, and the other side of the body. LPG safety discharge portion 30 formed and rotatably coupled to the upper portion of the body 310 to open and close the flow path 12 between the container fastening portion 50 and the coupling portion 320 as the user rotates. It includes a handle 11 and the shut-off device 400 is coupled to the coupling portion 320.

The shut-off device 400 includes a housing body 410 in which the coupling groove 325 of the coupling part 320 and its coupling jaw 414 are coupled by the coupling O-ring 415, and into the housing body 410. It consists of a check valve 420 having a gas flow hole 421 to be inserted, an insertion O-ring 425, a return spring 450, and a check sheet 430 having a packing 435.

Referring to the cross-sectional view of Figure 4, the body 310 of the valve device 300 has a flow path 12 is formed therein, the lower side of the body 310 is coupled to the container coupled to the upper end of the LLP container (not shown) Part 50 is formed, the coupling portion 320 is coupled to the cut-off device 400 is coupled to the coupling groove (325 (see Fig. 3b)) formed to one side of the body 110, the other of the body 110 LPG safety discharge portion 30 protruding to the side is formed.

Hereinafter, the automobile shutoff device 400 will be described in more detail with reference to FIGS. 5 to 7.

The shut-off device 400 is partially inserted into the housing body 410 by the coupling O-ring 415 to the coupling groove 325 of the coupling part 320 and automatically connected to the charging adapter or the pressure regulator. By opening and blocking the flow path, the check valve 420 inserted into the inner circumferential surface of the housing body 410 and the housing body 410 are coupled to the housing body 410 and elastically support the check valve 420. The return spring 450 provides a restoring force to return to the original position after the pressure movement of the check valve 420 during filling, the check seat 430 fixedly coupled to the end of the check valve 420, and the check valve. 420 includes an insertion o-ring 425 that is secured upon insertion into the housing body 410.

The housing body 410 is a tubular shape when the engaging jaw 414 of the outer circumference (see FIG. 3B) is coupled to the coupling portion 320, the coupling o-ring 415 is inserted to engage the coupling groove of the coupling portion 320 ( 325 is coupled to.

The inner circumferential portion of the housing body 410 includes first to fourth inner circumference portions 410a to 410d whose inner diameters are gradually decreased to have first to third locking jaws 411a, 411b, and 411c on the inner circumferential surface thereof. The support jaw 416 extends in the center direction inside the fourth inner circumference 410d.

In addition, a space in which the return spring 250 is inserted is formed between the check valve 420 on an inner circumferential surface of the housing body 410, and an inner circumferential surface of the housing body 410 stops the movement of the check valve 420. Two catching jaws 411b are formed.

In addition, a coupling O-ring 415 is formed between the coupling part 320 and the housing body 410 to maintain airtightness, and the check valve 420 moves in a state where the housing body 410 is fixed during charging. Therefore, since the coupling o-ring 415 does not actually move, wear resistance may be reduced, thereby improving durability.

According to the structure in which the second catching jaw 411b is formed in the housing body 410, the check valve 420 is operated only by the distance to the second catching jaw 411b of the inner circumferential surface of the housing body 410. Accordingly, the airtightness of the check valve 420 may be improved and the operation of the return spring 450 may be guaranteed.

At this time, the coupling o-ring 415 is more efficient in maintaining the airtight than the structure that requires the existing operation at the same time as a structure that only needs to ensure the airtight because there is no movement in the state of the shut-off device 400 is assembled.

The check valve 420 may increase the filling speed by increasing the flow rate when filling the gas, the inner end is inserted in the direction in which the housing body support jaw 416 is formed, the outer diameter of the inner end is the housing body support jaw It is set smaller than the inner diameter of 416.

In addition, the length of the second outer circumferential surface 420b of the check valve 420 is set longer than the total lengths of the third and fourth inner circumferential surfaces 410c and 410d of the housing body 410.

The check valve 420 has a tubular shape that is slidable along the inner circumference of the housing body 410, and the outer circumferential portion moves along the second inner circumference 410 b of the housing body 410. The outer diameter of the first outer peripheral surface 420a is sealed between the main portion 410b and the step portion 413 from the first outer peripheral surface 420a. A second outer circumferential surface 420b is provided, and at least one gas flow hole 421 communicates with the inside of the body of the valve device from the inner circumferential portion at the inner end thereof.

In addition, a stepped portion 413 is formed between the first outer circumferential surface 420a and the second outer circumferential surface 420b of the check valve 420 to contact the return spring 450, whereby the check valve 420 returns. It has a state that is elastically supported by the spring 450.

The return spring 450 is received between the third inner circumference 410c of the housing body 410 and the second outer circumference 420b of the check valve 420, and the front end thereof contacts the third locking jaw 411c. The rear end is in contact with the step 413.

When the charging adapter or the pressure regulator is coupled to the first inner circumferential portion 410a of the housing body 410, the stepped portion 413 contacts the second locking jaw 411b of the housing body 410. The check valve 420 is slidably moved so that the sealing state between the support jaw 416 and the check seat 430 of the check valve 420 is released, and the return spring 450 when the charging adapter or the pressure regulator is detached. The check valve 420 is slid outward by the restoring force of the check valve 420 is set between the supporting jaw 416 and the check seat 430 of the check valve 420 in a sealing state.

At least one gas flow hole 421 is formed on an inner circumferential surface of the check valve 420, and the number and shape of the gas flow holes 421 may be set according to a condition.

In addition, the seat fixing part 422 of the check valve 420 is elastically supported by the return spring 450 when it is in a normal state, and is in close contact with the support jaw 416 of the housing body 410 to shut off the gas. The housing body 410 and the check sheet 430 to keep the airtight are fixedly coupled.

 The check sheet 430 is installed at the inner end of the check valve 420 to block the gas flow through the gas flow hole 421 when the inner surface is in close contact with the support jaw 416. To this end, the check seat 430 is formed with a packing 435 in hermetic contact with the seat fixing part 422 of the check valve 420 and the support jaw 416 of the housing body 410.

The packing 435 is manufactured to be integrated with the check sheet 430 by injection injection, and is coupled to prevent departure from the check sheet 430 when gas is charged.

In this case, the packing 435 of the check sheet 430 is made of a rubber material having an elastic force, and since the surface contact is made with the support jaw 416 of the housing body 410 in the normal state, the airtight contact is maintained.

In addition, the check valve 220 is formed with at least one insertion O-ring 425 to maintain the housing body 410 and airtight.

In FIG. 5, the check valve 420 has a step portion 413 on a surface adjacent to the return spring 450 on an outer circumferential surface thereof, and a second catch on an inner side surface of the housing body 410 facing the step portion 413. The jaw 411b is formed, and the stepped portion 413 and the second catching jaw 411b are spaced apart in a state where the flow path is blocked by the elasticity of the return spring ring 450 when the charging adapter is not coupled. Located apart from each other, the housing body support jaw 416 maintains hermeticity with the check sheet 430 by the packing 435.

In addition, the coupling surface coupled to the coupling portion 320 and the housing body 410 is sealed by the coupling O-ring 415 while screwing the outer peripheral portion of the housing body 410 to the inner peripheral portion of the coupling portion 320 At the same time to form a metal touch unit 412 to maintain a tight bond to maintain the airtight. The metal touch unit 412 has a torque of 600 to 700 kg.f / cm, and when the metal touch operation is performed, the metal touch unit 412 of FIG. 5, in which the coupling unit 320 and the housing body 410 abut, is dotted. As shown by the circle, it can be kept in tight contact with each other.

Meanwhile, in the present invention, as shown in FIG. 8 in addition to the metal touch method of FIG. 7, the outer circumferential portion of the housing body 410 is screwed to the inner circumference of the coupling portion 320 and sealed by the coupling o-ring 415. At the same time maintaining the state can be maintained by preventing the loosening of the coupling portion 320 and the housing body 410 by using a stop pin (330: stop pin).

In addition, as shown in FIG. 9, while the outer peripheral portion of the housing body 410 is screwed to the inner peripheral portion of the coupling portion 320 while maintaining the sealing state by the coupling O-ring 415 and at the same time stop ring (350: stop ring) ) May be added to the coupling surface of the coupling part 320 and the housing body 410 to prevent loosening to maintain airtightness.

On the other hand, in addition to the method proposed in the present embodiments, any method that can maintain airtightness while preventing loosening between the coupling part 320 and the housing body 410 can be used without particular limitation.

Hereinafter, the operation of the valve device of the LLP container having an auto shutoff device will be described with reference to FIGS. 5 and 6.

In the state in which the filling adapter is coupled and the flow path is opened, the check valve 420 moves to the inside of the valve device by elastically deforming the return spring 450 as shown in FIG. 6 to seal the packing 435 from the housing body support jaw 416. This is separated. Then, the gas flow hole 421 of the check valve 42 is exposed on the inner space of the housing body 410 to form the flow passage 12. At this time, the check valve 420 stops the movement while the stepped portion 413 contacts the second catching jaw 411b of the housing body 410. That is, the distance between the stepped portion 413 and the second locking jaw 411b becomes a moving distance of the check valve 420 and becomes a clearance distance for opening and closing the flow path 12.

Looking at such a gas flow, first of all, the present invention improves the size and shape of the gas flow hole 421 of the check valve 420 to allow the gas to flow smoothly during gas filling, and maximizes the efficiency of the flow path by minimizing the filling resistance. Overall, the use of the valve device 300 for the LLP container according to the present invention can shorten the filling time.

On the other hand, the clearance of the movement of the check valve 420 is made according to the clearance distance between the second catching jaw (411b) of the housing body 410 and the stepped portion 413 of the check valve 420, the desired clearance Accordingly, the play distance can be changed in design.

Therefore, since the check valve 420 moves the same each time by the separation distance between the stepped portion 413 and the second locking jaw 411b to form the same flow path 12, the amount of elastic deformation of the return spring 450 is the same. There is no problem such as wear or twist of the return spring 450 is excellent in durability.

As described above, the check valve 420 of the present invention is combined with the return spring 450 in the housing body 410 and is formed as one accessory regardless of the valve, thereby ensuring airtightness and may occur when assembling parts. Eccentricity can be completely eliminated.

In addition, since the check valve 420 is operated inside the housing body 410, the influence of the external shock is less, thereby ensuring the operation of the check valve 420.

That is, the valve device 300 for the LLP container according to the present invention moves the check valve 420 fixedly coupled to the check seat 430 by inserting and partially coupling the housing body 410 to the coupling part 320, and the gas is The gas flow hole 421 of the check valve 420 flows directly to the outlet so that the gas flows smoothly, thereby minimizing the filling resistance of the gas to shorten the charging time.

In addition, the present invention can further secure airtightness by the coupling O-ring 415, the insertion O-ring 425 and the packing 435, because the structure is improved to achieve a multi-sealing by going through several sealing steps.

The present invention can be applied to the valve device for opening and closing the flow path in a variety of devices, as well as the valve device for the LPG container used in many homes and restaurants.

1 is a cross-sectional view for explaining a conventional valve device for LLP container,

Figure 2 is an exploded perspective view for explaining a valve assembly for a conventional vehicle shut-off device and LLP container,

3A and 3B are a perspective view and an exploded perspective view showing a valve device for an LLP container according to the present invention;

4 is a cross-sectional view of the valve device for an LLP container shown in FIG. 3A,

5 is an enlarged cross-sectional view illustrating an enlarged cutoff device of FIG. 4;

Figure 6 is a cross-sectional view showing the gas flow in the check valve is open in the shutoff device of Figure 5,

7 is a cross-sectional view illustrating an O-ring structure for sealing the shutoff device of FIG. 5 to a valve device;

8 and 9 are cross-sectional views showing other embodiments for sealing the shut-off device to the valve device.

DESCRIPTION OF THE REFERENCE NUMERALS

300: valve device 320: coupling portion

325: coupling groove 400: car blocking device

330: stop pin 350: stop ring

410: housing body 410a ~ 410d: first to fourth inner peripheral portion

420: check valve 430: check seat

450: return spring 411a ~ 411c: first to third locking jaw

412: metal touch parts 420a and 420b: first and second outer peripheral surfaces

413: step 414: coupling jaw

415: coupling O-ring 416: housing body support jaw

421 gas flow hall 422 seat fixing section

425: insert O-ring 435: packing

Claims (8)

In an automobile shut-off device that is coupled to the gas filling / discharging portion of the valve device for the gas container is automatically shut off the flow path in communication with the gas charging / discharging portion in accordance with the coupling of the charging adapter or pressure regulator, It has a tubular shape and the front end portion of the outer peripheral portion is inserted and coupled to the charging / discharging portion, the inner peripheral portion has a first to fourth inner circumference portion of the inner diameter is gradually reduced so as to have a first to third engaging jaw on the inner circumferential surface, A housing body in which a support jaw extends in a center direction of the fourth inner circumference; A first outer circumferential surface and a first outer circumferential surface formed of a tubular shape slidable along the inner circumferential portion of the housing body, the outer circumferential portion being sealed along the second inner circumferential portion while moving along the second inner circumferential portion of the housing body. A check valve having a second outer circumferential surface whose outer diameter is set to be minutely spaced from the fourth inner circumferential portion through the stepped portion, and having at least one gas flow hole communicating with the inside of the body of the valve device from the inner circumferential portion at an inner end thereof. ; A check sheet installed at an inner end of the check valve to block gas flow through the gas flow hole when the inner surface is in intimate contact with the support jaw; And A return spring received between the third inner circumferential portion of the housing body and the second outer circumferential surface of the check valve, the leading end being in contact with the third locking jaw, and the rear end being in contact with the step; When the charging adapter or the pressure regulator is coupled to the first inner circumference of the housing body, the check valve is slidably moved until the step portion contacts the second catching jaw of the housing body, thereby between the support jaw and the check seat of the check valve. The sealing state is released, and when the charging adapter or the pressure regulator is separated, the check valve is slid outward by the restoring force of the return spring, characterized in that the setting between the supporting jaw and the check seat of the check valve is set to the sealing state Shut-off device. The method of claim 1, And the housing body and the charging / discharging part are integrated by a metal touch in a sealed state by a coupling O-ring. The method of claim 1, Automotive blocking device further comprises an injection packing for making a close contact with the supporting jaw of the housing body on one side of the check sheet. The method of claim 1, And between the first outer circumferential surface of the check valve and the second inner circumferential portion of the housing body are sealed by an insertion O-ring inserted into the first outer circumferential surface. The method of claim 1, And the housing body and the charging / discharging part have a structure which is fixed by a stop pin to prevent loosening after being partially inserted and coupled by a coupling O-ring. The method of claim 1, And the housing body and the charging / discharging part have a structure fixed to the stop ring to prevent loosening after being partially inserted and coupled by the coupling O-ring. 2. The automobile shut-off device according to claim 1, wherein the length of the second outer circumferential surface of the check valve is set longer than the total length of the third and fourth inner circumferential surfaces of the housing body. An auto shut-off unit having a gas filling / exhausting unit on one side of the flow path, a valve body coupled to the gas container on the other side, and a built-in gas filling / exhausting unit to automatically shut off the flow path depending on whether the charging adapter or the pressure regulator is coupled. Consists of devices, The car blocking device, It has a tubular shape and the front end portion of the outer peripheral portion is inserted and coupled to the charging / discharging portion, the inner peripheral portion has a first to fourth inner circumference portion of the inner diameter is gradually reduced so as to have a first to third engaging jaw on the inner circumferential surface, A housing body in which a support jaw extends in a center direction of the fourth inner circumference; A first outer circumferential surface and a first outer circumferential surface formed of a tubular shape slidable along the inner circumferential portion of the housing body, the outer circumferential portion being sealed along the second inner circumferential portion while moving along the second inner circumferential portion of the housing body. A check valve having a second outer circumferential surface whose outer diameter is set to be minutely spaced from the fourth inner circumferential portion through the stepped portion, and having at least one gas flow hole communicating with the inside of the body of the valve device from the inner circumferential portion at an inner end thereof. ; A check sheet installed at an inner end of the check valve to block gas flow through the gas flow hole when the inner surface is in intimate contact with the support jaw; And A return spring received between the third inner circumferential portion of the housing body and the second outer circumferential surface of the check valve, the leading end being in contact with the third locking jaw, and the rear end being in contact with the step; When the charging adapter or the pressure regulator is coupled to the first inner circumference of the housing body, the check valve is slid until the step portion contacts the second locking jaw of the housing body so that the check valve is moved between the support jaw of the check valve and the check seat. The sealing state is released, and when the charging adapter or the pressure regulator is separated, the check valve is slid outward by the restoring force of the return spring, so that the sealing jaw and the check seat of the check valve are set to a sealing state. Valve device for container.

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