WO2023063529A1

WO2023063529A1 - Boss unit for pressure container, guide wrench for fastening boss unit, and method for manufacturing pressure container using same

Info

Publication number: WO2023063529A1
Application number: PCT/KR2022/009567
Authority: WO
Inventors: 송건하; 이종민; 성현진; 신동환
Original assignee: 한화솔루션 주식회사
Priority date: 2021-10-12
Filing date: 2022-07-04
Publication date: 2023-04-20
Also published as: KR20230052351A; KR102564901B1

Abstract

The present invention provides a boss unit comprising: a neck portion which is extended in the lengthwise direction, has a hollow hole formed therein, and provides a passage for a fluid; a support portion which is connected to one end of the neck portion, has a fastening hole at the center thereof to be in communication with the hollow hole, has a rim expanded in comparison with the outer diameter of the neck portion, and has a seating surface formed inside the rim due to a stepped portion; a wing portion connected to the other end of the neck portion and extending outward in the radial direction; and an adaptor portion which is formed in a cylindrical shape having both end portions open, has a stud formed on the outer circumference thereof, and has a fastening pin formed on the outer circumference at one end of the stud so as to be seated and fixed on the seating surface.

Description

Boss unit for pressure vessel, guide wrench for fastening boss unit and method for manufacturing pressure vessel

The present invention relates to a boss unit for a pressure vessel, a guide wrench for fastening the boss unit, and a method for manufacturing a pressure vessel using the same. More specifically, the present invention relates to a boss unit for a pressure container that can be fastened to an adapter for connection at one end of the boss, an engaging guide for the boss unit, and a boss unit fastening method using the same.

In general, type IV pressure vessels are manufactured by winding fibers impregnated with epoxy into carbon fibers in a cylindrical structure in which a plastic liner and a metal boss are joined.

Materials for lightening the liner are made of plastic materials such as polyolefin-based resin and polyamide-based resin, and the composite material layer is made of carbon fiber or glass fiber mixed with a polymer resin such as epoxy resin to maintain strength, and is applied to the surface of the liner. It is combined to be wrapped, and the nozzle-shaped boss is made of a metal material for solid coupling with a regulator or valve made of metal, and an adapter for connection is added to connect to a regulator.

1 is a perspective view of a boss unit showing a flange according to a conventional protruding boss and an adapter inserted into the flange, viewed from above, and FIG. 2 is a side view of the boss unit according to FIG. 1 .

1 and 2, in the conventional pressure vessel 10, a metal boss provided at one end of the liner 1 extends a flange 2 at one end to facilitate fastening with the adapter 3. The polygonal surface 2a is formed on the outer circumferential surface of the flange and the boss is first fixed using a wrench, and then the adapter 3 having the polygonal surface 3a formed on a part of the outer circumferential surface is fastened to one end of the boss, and then the wrench fastened to the adapter By rotating, the adapter 3 is tightly coupled to the boss.

Conventionally, when the adapter (3) is fastened to the boss, wrenches for fixing the boss and for fastening the adapter are separately required, and in particular, to form the polygonal surface (3a) for fastening to the adapter (3), it is constantly exposed to the top of the liner. Therefore, it is disadvantageous to secure the contents in the length direction of the liner as much as the length of each side, and when the adapter (3) is fastened using a wrench, which is a hand tool after fixing the boss, an accurate torque cannot be given, depending on the skill of the technician. A problem arises in which adapter assembly quality is determined.

Republic of Korea Patent Publication No. 10-2018-0108715 discloses a pressure vessel system in which a boss and a liner are inserted into the boss to form a connection interface, but improve the coupling relationship between the boss and the boss adapter to increase the internal volume of the pressure vessel However, a configuration for increasing the accuracy and convenience of fastening of the adapter is not disclosed.

An object of the present invention is to improve the structure of an adapter fastened to a metal boss disposed at one end of the liner to have an insert-type structure in which the adapter is inserted into and fastened to the inside of one end of the boss, rather than a protruding structure in which the fastened adapter protrudes from one end of the boss. The boss unit is provided to increase the internal volume of the pressure vessel and at the same time to provide a boss unit with greatly increased manufacturing efficiency. An object of the present invention is to provide a guide wrench capable of fastening an adapter to a boss at one time using a guide wrench that is adjusted to the right, and to provide a method of manufacturing a pressure vessel using the guide wrench.

The above and other objects of the present invention can all be achieved by the present invention described below.

1. One aspect of the present invention relates to a boss unit for a pressure vessel.

The boss unit includes a neck portion extending in the longitudinal direction, having a hollow formed therein, and providing a fluid passage;

a supporting portion connected to one end of the neck portion, having a fastening hole communicating with the hollow on a central portion, having an rim extending beyond the outer diameter of the neck portion, and having a seating surface formed inside the rim due to a step;

Wings connected to the other end of the neck and extending outward in a radial direction; and

It has a cylindrical shape, both ends are open, studs are formed on an outer circumferential surface, and an adapter unit is provided with a fastening pin on one end of the outer circumferential surface of the stud to be seated and fixed on the seating surface.

2. In the first embodiment, the adapter unit may include a stud provided at one end and a screw thread extending from a lower portion of the stud.

3. In the above two specific examples, a plurality of seals may be provided at one end of the screw thread.

4. In any one of the embodiments of 1 to 3, the fastening pins are spaced apart at regular intervals, and the socket part of the guide wrench is fastened to the fastening pin to rotate the adapter part so that the adapter part can be coupled to the neck part .

5. In the above 4 specific examples, the fastening pins are formed in plural, and the fastening pins may be radially spaced apart at 45° to 90° based on the cross section of the stud.

6. In the specific example of any one of 1 to 5, both ends of the fastening pin are tapered from the outer circumferential surface toward the center of the stud, and the height of the fastening pin may be determined according to Equation 1 below.

[Equation 1]

Hi ≤ Ho

Here, Hi is the distance from the bottom of the stud to the top of the fastening pin, and Ho is the depth of the step inside the frame.

7. In the specific example of any one of 1 to 6 above, the outer circumferential surface of the supporting portion may be formed as a polygonal surface.

8. Another aspect of the present invention relates to a guide wrench capable of fastening the boss unit.

The guide wrench includes a socket having a chucking part fastened to the adapter part of the boss unit to rotate the adapter part;

a connection shaft connected at the top of the socket;

a lower support in which the connecting shaft is fastened to the center and a ratchet is formed therein;

an upper support engaged with the ratchet and provided with a spring on the inside;

a torque control lever disposed outside the upper support and adjusting the pressure of the spring to adjust the degree of fastening between the lower support and the upper support;

a load arm connected to the upper support and rotating the upper support in one direction; and

and a handle provided at one end of the load arm.

9. In the eighth embodiment, the chucking part may be arranged radially with a plurality of jaws spaced apart along the edge.

10. In the ninth embodiment, the jaws may be spaced apart from each other by 45° to 90° with respect to the plane of the socket unit.

11. In any one embodiment of 8 to 10 above, the handle can adjust the length of the load arm.

12. Another aspect of the present invention relates to a pressure vessel comprising a boss unit.

The pressure vessel may include the boss unit;

a liner connected to the wing of the boss unit and having a fluid storage space therein; and

and a composite layer formed by winding the boss unit and the outer circumferential surface of the liner.

13. Another aspect of the present invention relates to a method for manufacturing a pressure vessel including a boss unit.

(a) preparing a liner equipped with a boss unit;

(b) forming a composite material layer by winding a composite material filament around an outer circumferential surface of the liner; and

(c) fastening the adapter unit to the boss unit using a guide wrench;

14. In the thirteenth embodiment, in step (a), the boss unit has a neck portion and a support portion having a diameter greater than that of the neck portion, so that the fastening pin of the adapter may be seated on the support portion.

15. In the 13th or 14th embodiment, in step (c), the guide wrench has a jaw fastened to the fastening pin, and the torque is adjusted according to the operation of the torque control lever to limit the fastening strength of the adapter can do.

The boss unit according to the present invention does not require a protruding structure for assembling the adapter part to the boss body, and the protruding structure of the boss for fastening the adapter part is excluded, so it is advantageous to secure the internal volume in the longitudinal direction of the liner, and the boss unit The guide wrench having a socket formed according to the structure can effectively prevent damage to the boss and the adapter part by adjusting the torque when the adapter part is fastened, and the internal volume of the pressure container equipped with the boss unit is increased to increase manufacturing efficiency The pressure vessel manufacturing method according to another aspect of the present invention greatly reduces the manufacturing man-hours by excluding the step of fastening the adapter unit using two wrenches when manufacturing the pressure vessel including the boss unit. and manufacturing defects that occur when the adapter unit is fastened can be effectively reduced.

1 is a perspective view of a pressure vessel showing a state in which an adapter is fastened to a conventional liner and a boss.

Figure 2 is a side view showing the coupling of the boss and the adapter according to Figure 1;

3 is an exploded perspective view of a boss unit according to one embodiment of the present invention.

4 is a perspective view illustrating a boss unit according to FIG. 3 .

5 is a perspective view of a pressure vessel including a boss unit according to another embodiment of the present invention.

6 is a side cross-sectional view taken along the line II of FIG. 5;

7 is a side cross-sectional view taken along line II-II of FIG. 5;

8 is an exploded perspective view of a guide wrench according to another aspect of the present invention.

9 is a plan view and a side view of the socket portion of the guide wrench according to FIG. 8;

10 is a use state diagram showing the boss unit and fastening of the guide wrench according to FIG. 8;

11 is a cross-sectional side view showing a fastening state of an adapter when a conventional boss body is exposed.

12 is a perspective view showing a state in which the guide wrench according to FIG. 8 is fastened to a boss unit.

13 is a process flow chart of a method for manufacturing a pressure vessel including a boss unit according to another aspect of the present invention.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings. However, the following drawings are only provided to aid understanding of the present invention, and the present invention is not limited by the drawings. In addition, since the shape, size, ratio, angle, number, etc. disclosed in the drawings are exemplary, the present invention is not limited to the illustrated details.

Like reference numbers designate like elements throughout the specification. In addition, in describing the present invention, if it is determined that a detailed description of related known technologies may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted.

When 'includes', 'has', 'consists of', etc. mentioned in this specification is used, other parts may be added unless 'only' is used. In the case where a component is expressed in the singular, the case including the plural is included unless otherwise explicitly stated.

In interpreting the components, even if there is no separate explicit description, it is interpreted as including the error range.

When the positional relationship of two parts is described by 'over', 'over', 'under', 'beside', etc., unless 'immediately' or 'directly' is used, there is a One or more other parts may be located.

Positional relationships such as 'top', 'top', 'bottom', and 'bottom' are described based on the drawings, and do not represent absolute positional relationships. That is, the positions of 'upper' and 'lower' or 'upper surface' and 'lower surface' may be changed depending on the observation position.

In this specification, "a to b" representing a numerical range is defined as "≥a and ≤b".

Hereinafter, referring to the drawings, the present invention will be described in detail.

Figure 3 is an exploded perspective view of a boss unit according to one embodiment of the present invention, Figure 4 is a perspective view showing the boss unit according to Figure 3, Figure 5 is a pressure vessel including a boss unit according to another embodiment of the present invention It is a perspective view of, Figure 6 is a side cross-sectional view taken along the line II-I of FIG. 5, Figure 7 is a side cross-sectional view taken along the line II-II of FIG.

3 to 7 , a boss unit 1000 according to one embodiment of the present invention includes a neck part 200, a support part 300, a wing part 400, and an adapter part 100.

The neck portion 200 extends in the longitudinal direction and has a hollow formed therein to provide a fluid passage. The neck portion 200 is provided and the composite material layer 600 may be formed by winding the composite material around the neck portion 200 .

The neck portion 200, the supporting portion 300, and the wing portion 400 form a boss body, and are preferably made of metal and integrally formed.

The supporting portion 300 is connected to one end of the neck portion 200, a fastening hole 310 communicating with the hollow is formed on the center portion, and an rim 320 extending beyond the outer diameter of the neck portion 200 is provided. , The seating surface 330 due to the step is formed on the inside of the rim 320.

The support part 300 is provided with a rim 320 that is wider than the outer diameter of the neck part 200, so that when the adapter part 100 is fastened, the fastening pin 111 provided in the adapter part 100 is attached to the support part ( 300) The adapter part 100 can be stably fastened to the support part 300 by allowing it to be seated inside and preventing the fastening pin 111 from being exposed to the outside.

The seating surface 330 is formed due to a step on the inside of the rim 320, and the seating surface 330 provides a space in which the fastening pin 111 can be seated.

When the seating surface 330 is not formed, the fastening pin 111 is exposed to the outside, so that the adapter part 100 is not firmly fixed on the supporting part 300, and the fastening pin ( 111) rotates in the reverse direction, and there is a possibility that the adapter part 100 may be separated from the boss body.

The wing portion 400 is connected to one end of the neck portion 200 and extends outward in the radial direction.

The wing portion 400 extends outward in the radial direction so that the liner 500 is fused and coupled very easily, and the boss unit 1000 is easily combined with the liner 500 by placing the boss unit 1000 in a mold and performing injection molding. can make it

On the other hand, the adapter part 100 has a cylindrical shape with both ends open, and a stud 110 is formed on an outer circumferential surface, and a fastening pin 111 is provided on one end of the outer circumferential surface of the stud 110 to be seated on the seating surface 330 and fixed. do.

Since the adapter part 100 has a cylindrical shape and is opened at both ends, a communication hole 140 is formed on the inside, and the communication hole 140, together with the fastening hole 310, provides a space through which fluid can flow. can

The adapter unit 100 may include a stud 110 and a screw thread 120 . Specifically, the adapter unit 100 may include a stud 110 provided at one end and a screw thread 120 extending from a lower portion of the stud 110 .

The stud 110 provides a place where the fastening pin 111 is provided at one end, and since there is no protruding part such as the screw thread 120 on the outer circumferential surface, the adapter part 100 is fastened to the support part 300 It is very easy to fasten with the socket 2100 of the guide wrench 2000.

A plurality of seal rings 130 may be provided at one end of the screw thread 120 .

When the thread 120 is provided, a plurality of seal rings 130 may be provided, and when a plurality of seal rings 130 are provided, the space between the adapter part 100 and the neck part 200 is effectively sealed. Therefore, safety can be increased when the adapter part 100 is fastened.

The sealing 130 may be made of an elastic resin, and it is different depending on the use of the pressure vessel, but it is preferable to select one that can be supported even at an internal pressure of 200 bar or more.

The fastening pins 111 are spaced apart at regular intervals, and the socket 2100 of the guide wrench 2000 is fastened to the fastening pin 111 to rotate the adapter part 100 in one direction so that the neck part 200 The adapter unit 100 can be coupled to.

When the fastening pin 111 is provided, the fastening pin 111 can be fastened and fixed to the support part 300 only with a guide wrench 2000, and the fastening pin 111 is not provided and the outer circumferential surface of the boss When the polygonal face is provided, a wrench for supporting the boss and a separate wrench for mounting the adapter to the boss body are required, which increases work man-hours and causes assembly defects.

When the fastening pin 111 is provided, the adapter unit 100 can be effectively inserted into and fixed to the support unit 300 using only the guide wrench 2000 .

When the fastening pins 111 are spaced apart at regular intervals and fastened by rotating the fastening pins 111, the force applied to the fastening pins 111 can be dispersed, and the fastening pins 111 can be used as sockets of guide wrenches. It is easy to fasten to the part.

In one embodiment, the fastening pins 111 are formed in plural, and the fastening pins 111 may be radially spaced apart at 45° to 90° with respect to the cross section of the stud 110.

The inset of FIG. 3 shows a plane of the adapter unit 100 on which the fastening pins 111 are formed. Referring to the inset of FIG. 3 , the fastening pins 111 are arranged radially, and any one fastening pin 111 may be disposed in plurality by being spaced apart from adjacent fastening pins 111 at a predetermined angle. For example, if the center of the fastening pin 111 is spaced apart at an angle of 90 °, the fastening pin 111 may be formed in four pieces, and when the center of the fastening pin 111 is formed at 45 °, the fastening pin 111 It is also possible to form with these 8 pieces.

The number of the fastening pins 111 depends on the diameter of the adapter part 100 and the size of the socket 2100 of the guide wrench 2000 that is fastened to the fastening pin 111 to rotate the adapter part 100. may be determined differently.

It is preferable that the number of the fastening pins 111 is determined by the number within the above range, and when the number of the fastening pins 111 does not reach the above range, the force applied to each fastening pin 111 increases to facilitate Although it can be fastened by rotating the adapter part 100, it is difficult to precisely adjust the fastening strength of the adapter part 100 because the torque is easily increased, and when the number of the fastening pins 111 exceeds the above range, Although it is easy to limit the torque, it is not preferable because the number of man-hours for manufacturing the fastening pin 111 increases and it is not easy to manufacture the socket 2100 of the guide wrench 2000 to be fastened.

In one embodiment, both ends of the locking pin 111 are tapered from the outer circumferential surface 310 toward the center of the stud 110, and the height of the locking pin 111 may be determined according to Equation 1 below.

[Equation 1]

Hi ≤ Ho

Here, Hi is the distance from the bottom of the stud 110 to the top of the fastening pin 111, and Ho is the depth of the step inside the edge 320.

When both ends of the fastening pin 111 are tapered from the outer circumferential surface 310 toward the center of the stud 110, the coupling area with the socket 2100 fastened to the fastening pin 111 increases, thereby increasing fastening strength. , The locking pin 111 can be rotated effectively with little force.

On the other hand, referring to FIGS. 6 and 7, the seating surface 330 is formed stepwise on the supporting portion 300, so that the outer circumference of the fastening pin 111 can be seated and fixed on the seating surface 330, , It is possible to configure the insert type boss unit 1000 in which the connecting portion of the adapter unit 100 is not exposed to the outside of the supporting unit 300 due to the rim 320 .

At this time, the maximum diameter of the fastening pin 111 is smaller than the inner circumferential diameter of the seating surface 330 by about 1 to 5 mm, so that when the fastening pin 111 rotates, it comes into contact with the inside of the seating surface 330 and does not cause friction. It is preferable not to

In the fastening pin 111, the distance Hi from the lower part of the stud 110 to the upper part of the fastening pin 111 is less than the depth Ho of the step inside the rim 320, so that the upper end of the fastening pin 111 Also, it is not exposed to the outside of the rim 320 of the supporting portion 300.

When the fastening pin 111 is rotated and completely fastened to the supporting part 300, it is buried inside the supporting part 300, and the fastening pin 111 does not come into contact with an external object to cause friction, so the boss unit 1000 ) can increase safety.

On the other hand, the adapter part 100 is provided with the fastening pin 111 on the outer circumferential surface of the stud 110, and rotates along the fastening hole 310 in the center of the support part 300 according to the rotation of the fastening pin 111. It is fastened and can be fixed.

The adapter unit ( 100) The thread 120 of the adapter part 100 is fastened to the supporting part 300, and the guide wrench 2000 can adjust the torque so that the force applied to the fastening pin 111 can be controlled. It is possible to prevent damage to the adapter unit 100 due to excessive torque being applied to.

In one specific example, the outer circumferential surface 321 of the supporting portion 300 may be formed as a polygonal surface.

The outer circumferential surface 321 of the supporting part 300 may have a polygonal surface. In this case, the boss unit 1000 is fixed by fastening a wrench to the polygonal surface, and an additional connecting member such as a regulator or valve When connecting to the adapter unit 100, it is also possible to increase fastening efficiency.

The boss unit 1000 according to one embodiment of the present invention does not require two wrenches to fasten the adapter unit 100 to the boss body, so the work man-hours are greatly reduced, and the adapter unit according to the excessive torque application of the wrench ( 100) The risk of breakage is significantly reduced, and since the fastening pin 111 provided in the adapter part 100 is not exposed to the outside of the support part 300, the protrusion of the liner for fastening the adapter part 100 is an insert type structure. Since a structure is not required, it is advantageous to secure the internal volume of the liner, so that the pressure vessel equipped with the boss unit 1000 can reduce manufacturing man-hours and increase manufacturing efficiency.

Another aspect of the present invention relates to a guide wrench 2000 capable of fastening the boss unit 1000.

Figure 8 is an exploded perspective view of a guide wrench according to another aspect of the present invention, Figure 9 is a plan view and side view of the socket portion of the guide wrench according to Figure 8, Figure 10 shows the boss unit and fastening of the guide wrench according to Figure 8 11 is a cross-sectional side view showing a fastening state of the adapter when the conventional boss body is exposed, and FIG. 12 is a perspective view showing a state where the guide wrench according to FIG. 8 is fastened to the boss unit.

8 to 12, the guide wrench 2000 according to another aspect of the present invention includes a socket 2100, a connecting shaft 2200, a lower support 2300, an upper support 2400, and a torque control lever 2600. , a load arm 2500, and a handle 2700.

The socket 2100 is provided with a chucking part 2110 coupled to the adapter part 100 so that the adapter part 100 can be fastened to the boss body by rotating the adapter part 100 in one direction.

In one specific example, a plurality of jaws 2111 may be radially spaced apart from each other along an edge of the chucking unit 2110 .

The jaw 2111 may be disposed at an angle of 45° to 90° with respect to the plane of the socket 2100 .

Specifically, the position of the jaw 2111 may be displaced from the position where the fastening pin 111 formed in the adapter part 100 of the boss unit 1000 is disposed. For example, the fastening pin 111 When the center of any one locking pin 111 is disposed at 0 ° and 90 ° positions based on the cross section of the adapter unit 100, the center of the jaw 2111 is located at 45 ° and 135 ° position correspondingly Each of them can be arranged so that they are precisely meshed.

When the jaw 2111 of the chucking part 2110 is disposed and the jaw groove 2112 is formed, it engages with the fastening pin 111 of the adapter part 100 to rotate the adapter part 100 in one direction to form a boss It can be fastened to the body, and after the fastening is completed, the socket 2100 can be easily separated.

The connecting shaft 2200 is connected at an upper end of the socket 2100 and can transfer torque according to rotation of the load arm 2500 to the socket 2100 .

In the lower support 2300, the connecting shaft 2200 is fastened to the center and a ratchet 2310 is formed on the inside.

The upper support 2400 is engaged with the ratchet 2310 and has a spring (not shown) inside, and the torque control lever 2600 is disposed outside the upper support 2400 to control the pressure of the spring. It is possible to adjust the degree of fastening of the lower support 2300 and the upper support 2400 by adjusting.

When the torque control lever 2600 adjusts the fastening emphasis of the lower support 2300 and the upper support 2400 and rotates the lower support 2300 in one direction by the ratchet 2310, the connecting shaft 2200 ) also rotates in one direction, and the torque transmitted to the socket 2100 is controlled so that the fastening strength of the adapter part 100 can be effectively controlled. The load arm 2500 is connected to the upper support 2400 and can rotate the upper support 2400 in one direction.

The load arm 2500 is rotated to transmit rotational force to the upper support 2400, and as the upper support 2400 rotates, the lower support 2300 rotates, thereby rotating the socket 2100.

The handle 2700 can adjust the length of the load arm 2500.

For example, the handle 2700 is provided as a turnbuckle to adjust the overall length of the rod arm 2500, and at this time, a torque display unit 2710 capable of displaying the amount of torque increase according to the extended length is additionally disposed. possible.

Specifically, the torque control lever 2600 adjusts the degree of fastening of the upper support 2400 and the lower support 2300 and adjusts the length of the handle 2700 to connect the socket 2100 along the connecting shaft 2200. It is possible to effectively prevent the adapter part 100 from being damaged by excessive torque while being fastened to the supporting part 300 by precisely adjusting the transmitted torque.

Therefore, the guide wrench 2000 according to another aspect of the present invention is provided with a socket 2100 corresponding to the arrangement of the fastening pin 111 in the process of forming a boss unit, so that torque can be adjusted when the adapter unit 100 is fastened. Since the adapter unit 100 is prevented from being damaged and the entire adapter unit 100 is wrapped and fastened, fastening convenience can be greatly increased.

Referring to FIG. 11, conventionally, a wrench (W1) for fixing the boss nozzle (B) and a wrench (W2) for fixing the adapter are separately required to fix the adapter, but the guide wrench (2000) is a single wrench. It is possible to fasten the adapter part 100 only with the pressure container manufacturing man-hour and greatly increase the manufacturing efficiency.

Another aspect of the present invention relates to a pressure vessel including a boss unit.

The pressure vessel may include a boss unit; It includes a liner and a composite layer.

The liner 500 is connected to the wing portion 400 of the boss unit 1000 and a fluid storage space is formed therein.

The boss unit 1000 may be manufactured by injection molding together with the liner 500 .

The composite material layer 6000 is formed by winding the outer peripheral surfaces of the boss unit and the liner.

Therefore, the pressure vessel including the boss unit according to another aspect of the present invention does not require a polygonal surface having a certain depth on the outer circumferential surface of the adapter to fasten the adapter when a connecting member is added to the boss body, such as a regulator or a valve. Since a portion extending for fastening the adapter is excluded, the internal volume of the liner in the longitudinal direction can be increased.

Another aspect of the present invention relates to a method for manufacturing a pressure vessel including a boss unit.

Referring to FIG. 13, a method of manufacturing a pressure vessel including a boss unit includes (a) preparing a liner equipped with a boss unit; (b) forming a composite material layer by winding a composite material filament around an outer circumferential surface of the liner; and (c) fastening the adapter to the boss unit using a guide wrench.

First, a liner equipped with a boss unit is prepared (S100).

The boss unit is preferably formed by being injected together by a mold injection method during liner molding, but it is also possible to combine the boss unit after forming the liner, and any method capable of combining the metal boss body with the liner is not limited.

In the S100, the boss unit has a neck portion and a support portion having a diameter greater than that of the neck portion, so that the fastening pin of the adapter portion may be seated on the support portion.

Since the fastening pin is seated inside the supporting portion and the fastening pin is not exposed to the outside of the supporting portion, the adapter can be formed as an insert type structure, and external substances are prevented from being exposed to the boss unit. can prevent getting caught.

A composite material layer is formed by winding a composite material filament around the outer circumferential surface of the liner (S200).

Since the composite material layer is formed, physical properties such as rupture pressure of the pressure container can be greatly increased.

The adapter unit is fastened to the boss unit using the guide wrench (S300).

The guide wrench has a jaw fastened to the fastening pin, and the torque is adjusted according to the torque control lever to limit the fastening strength of the adapter.

Specifically, when the adapter provided in the boss unit is coupled to the boss body by rotating the adapter by adjusting the torque using the guide wrench, it is possible to prevent damage due to application of excessive torque when fastening the adapter, and the adapter to the boss body. In case of fastening the part, the boss unit can be finally completed by fastening the adapter part to the boss body only with a guide wrench without using two wrenches.

Therefore, in the pressure container manufacturing method according to the present invention, there is no need to form a polygonal surface for wrench fastening in the longitudinal direction on the outer periphery of the adapter part in order to fasten the adapter part to the boss body, and the boss unit is formed using the adapter part on which the fastening pin is formed. In addition, a socket corresponding to the fastening pin is provided, and a torque control lever is provided to adjust the torque using a guide wrench to adjust the torque to fasten the adapter unit to prevent damage to the adapter unit and the boss body due to excessive torque. can

So far, the present invention has been looked at mainly through embodiments. Those skilled in the art to which the present invention pertains will be able to understand that the present invention can be implemented in a modified form without departing from the essential characteristics of the present invention. Therefore, the disclosed embodiments should be considered from an illustrative rather than a limiting point of view. The scope of the present invention is shown in the claims rather than the foregoing description, and all differences within the equivalent scope will be construed as being included in the present invention.

Claims

A neck portion extending in the longitudinal direction, having a hollow formed therein, and providing a fluid passage;

a supporting portion connected to one end of the neck portion, having a fastening hole communicating with the hollow on a central portion, having an rim extending beyond the outer diameter of the neck portion, and having a seating surface formed inside the rim due to a step;

Wings connected to the other end of the neck and extending outward in a radial direction; and

A boss unit including an adapter unit having a cylindrical shape with both ends open, studs formed on an outer circumferential surface, and an adapter unit provided with a fastening pin on one end of the outer circumferential surface of the stud to be seated and fixed on the seating surface.
The boss unit of claim 1, wherein the adapter unit includes a stud provided at one end and a screw thread extending from a lower portion of the stud.
The boss unit according to claim 2, characterized in that a plurality of seals are provided at one end of the screw thread.
The boss unit according to claim 1, wherein the fastening pins are spaced apart at regular intervals, and a socket part of a guide wrench is fastened to the fastening pin to rotate the adapter part so that the adapter part is coupled to the neck part.
The boss unit according to claim 4, wherein a plurality of fastening pins are formed, and the fastening pins are radially spaced apart from each other by 45° to 90° with respect to the cross section of the stud.
The boss unit according to claim 1, wherein both ends of the fastening pin are tapered from the outer circumferential surface toward the center of the stud, and the height of the fastening pin is determined according to Equation 1 below:

[Equation 1]

Hi ≤ Ho

Here, Hi is the distance from the bottom of the stud to the top of the fastening pin, and Ho is the depth of the step inside the frame.
The boss unit according to claim 1, wherein an outer circumferential surface of the supporting portion is formed as a polygonal surface.
A guide wrench for fastening the boss unit according to any one of claims 1 to 7,

a socket provided with a chucking part coupled to the adapter part of the boss unit to rotate the adapter part;

a connection shaft connected at the top of the socket;

a lower support in which the connecting shaft is fastened to the center and a ratchet is formed therein;

an upper support engaged with the ratchet and provided with a spring on the inside;

a torque control lever disposed outside the upper support and adjusting the pressure of the spring to adjust the degree of fastening between the lower support and the upper support;

a load arm connected to the upper support and rotating the upper support in one direction; and

A guide wrench including a handle provided at one end of the rod arm.
[Claim 9] The guide wrench according to claim 8, wherein a plurality of jaws of the chucking part are spaced apart from each other and arranged radially along an edge.
[Claim 10] The guide wrench according to claim 9, wherein the jaws are spaced apart from each other by 45*?* to 90*?* with respect to the plane of the socket.
[Claim 9] The guide wrench according to claim 8, wherein the handle can adjust the length of the rod arm.
A boss unit according to any one of claims 1 to 7;

a liner connected to the wing of the boss unit and having a fluid storage space therein; and

A pressure vessel including a composite layer formed by winding the boss unit and the outer circumferential surface of the liner.
(a) preparing a liner equipped with a boss unit according to any one of claims 1 to 7;

(b) forming a composite material layer by winding a composite material filament around an outer circumferential surface of the liner; and

(c) fastening the adapter part of the boss unit by using a guide wrench; a pressure vessel manufacturing method comprising the.
14. The method of claim 13, wherein in step (a), the boss unit has a neck portion and a support portion having a diameter greater than that of the neck portion, and the fastening pin of the adapter is seated on the support portion. method.
The method of claim 13, wherein in the step (c), the guide wrench has a jaw fastened to the fastening pin, and the torque is adjusted according to the operation of the torque control lever to limit the fastening strength of the adapter. Method for manufacturing a pressure vessel.