KR20200051364A - Apparatus for fastening pressure vessel of vehicle - Google Patents

Abstract

In a pressure vessel having a fixing method of a band structure of the present invention, a buffer band is inserted between the pressure vessel and a band, and an insert member is inserted and secured between the band and the pressure vessel at a fastening position above a horizontal center line of the pressure vessel. Accordingly, provided is a fixing structure of the pressure vessel which effectively blocks foreign matter inflow between the pressure vessel and the band, thereby preventing problems related to safety such as bursting of the pressure vessel. The pressure vessel fixing apparatus comprises: a lower band; a lower buffer band; an upper band; an upper buffer band; a first fixing unit; and a second fixing unit.

Description

Pressure Vessel Fixture {APPARATUS FOR FASTENING PRESSURE VESSEL OF VEHICLE}

The present invention relates to a pressure vessel holding device, and more particularly, to a band type pressure vessel holding device for fixing the pressure vessel to the vehicle.

In the case of a CNG or hydrogen tank used for automobiles, a cylinder shape is generally used in order to secure a pressure-resistant performance for a storage pressure higher than 200 atm. Two methods of fixing the pressure vessel to the vehicle are used.

The first method is a method of fixing the cylinder portion to the vehicle body by wrapping it with a band, and the second method is a method of fixing the neck portion at both ends of the pressure vessel.

In the case of a passenger vehicle, when the neck portion is fixed, a band type is mainly applied because of a disadvantage in a vehicle package. The pressure vessel is mainly located at the bottom of the vehicle, and the band surrounding the tank is divided into 2-3 pieces to be assembled with bolts.

In order to fix such a band to the vehicle body, a case in which a band at the bottom of the tank greatly surrounds the tank at 180 degrees or more occurs, and in this case, an empty space between the tank and the band may be generated. In addition, even if the band does not become more than 180 degrees, the problem that space is generated between the band and the tank often occurs as an external force, etc., which may occur during driving is applied.

In this case, foreign matter such as metal, stone, sand, etc. may be deposited in the empty space while the vehicle is in operation, and the composite tank may repeatedly expand and contract during fuel charging and discharging, thereby damaging the surface. Since the surface of the composite container is composed of a fiber-resin composite material, the performance of the composite material may deteriorate when damaged by abrasion and may lead to safety accidents such as bursting of the pressure container.

Patent Document 1: Republic of Korea Registered Patent No. 10-1745289 (2017. 06. 01.)

The present invention has been devised to solve the above problems, and in the present invention, in a pressure vessel having a fixed structure of a band structure, by effectively blocking the inflow of foreign substances between the pressure vessel and the band, safety problems such as bursting the pressure vessel It is an object of the present invention to provide a fixed structure of a pressure vessel that can be prevented.

In order to achieve the above object, in a preferred embodiment of the present invention, the pressure vessel holding device, the lower band having a seating surface made of a shape corresponding to the outer peripheral surface of the pressure vessel so that the pressure vessel can be seated; A lower buffer band inserted between the lower band and the outer circumferential surface of the pressure vessel; An upper band fixed to the lower band and surrounding the pressure vessel with the lower band while fixing in the circumferential direction; An upper buffer band inserted between the upper band and the outer circumferential surface of the pressure vessel; A first fixing unit for fastening the upper band and the lower band in a first fastening position; And a second fixing unit for fastening the upper band and the lower band in a second fastening position, wherein the first fastening position is located above the horizontal center line of the pressure vessel, and with the lower band in the first fastening position. It provides a pressure vessel holding device, characterized in that the insert member is inserted and fixed between the pressure vessel.

According to a preferred embodiment of the present invention, while securing sufficient rigidity and durability of the fixed structure of the pressure vessel, it is possible to install the fixing device in close contact with the pressure vessel as much as possible, the effect of installing the pressure vessel as compact as possible in the vehicle package configuration There is.

To this end, in a portion where the position of the band fixing portion for fixing the tank is higher than the horizontal center line of the tank, even if a gap occurs between the tank and the lower band of the tank, through the insert bushing installed in the gap, foreign matter inflow into the gap is prevented. Since it can be blocked at the source, there is an effect that can fundamentally prevent durability degradation from the external environment when using a composite container for a long time.

1 shows a pressure vessel secured by a pressure vessel holding device according to a preferred embodiment of the present invention,
Figure 2 shows the AA 'section for the right pressure vessel in the pressure vessel and the pressure vessel holding device of Figure 1,
3 is an enlarged view of a fastening part on a horizontal center line in the cross-section of FIG. 2,
4 is another embodiment of the present invention, showing an example of configuring the fastening portion by applying an insert member-integrated cushioning band,
Figure 5 shows a first embodiment of the insert member integral buffer band of Figure 4,
6 shows a second embodiment of the insert member integral buffer band of FIG. 4.

Hereinafter, a fixing device for a pressure vessel according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 shows a pressure vessel secured by a pressure vessel holding device according to a preferred embodiment of the present invention, and FIG. 2 shows an AA ′ cross-section for the right pressure vessel in the pressure vessel and pressure vessel holding device of FIG. 1. It is shown.

1 and 2, a pressure vessel fixing device according to a preferred embodiment of the present invention wraps the pressure vessel in a band type to fix the pressure vessel to the vehicle, and a member extending the band is fixed to the vehicle. It shows the way.

The pressure container in the present invention means a container for storing high-pressure gas, such as in a fuel cell vehicle, and preferably may be a structure including a cylindrical cylinder portion, a dome portion on both sides, and a boss portion forming both ends. However, the pressure container of the present invention is not limited to the hydrogen storage tank of such a fuel cell vehicle, and should be interpreted as a broad concept including a container for storing various types of pressure fluid.

In addition, the band-type fixing device is sufficient to have a band structure having a seating surface supporting a part of the pressure container along the outer circumference of the cylinder of the pressure container, and the entire outer circumferential surface of the pressure container must be supported by the band. It is not.

In addition, in FIG. 1, as a preferred embodiment of the present invention, a pair of bands are spaced back and forth to support and fix the pressure vessel, but the pressure vessel is not necessarily fixed by the pair of band structures. , It may be made of a structure supported by a single band assembly according to the area of the seating surface of the band. In addition, unlike FIG. 1, three or more bands may be configured to be spaced apart, so the pressure vessel fixing device of the present invention should be interpreted regardless of the number of bands.

However, hereinafter, as illustrated in FIG. 1, the present invention will be described according to an example in which the pressure vessel is fixed back and forth by a pair of bands spaced along the axial direction of the pressure vessel, and in particular, the detailed structure of the pressure vessel fixing device is It will be described according to the AA 'cross-sectional structure shown in FIG.

Specifically, the pressure vessel holding device according to a preferred embodiment of the present invention, as shown in Figures 1 and 2, a pair of lower bands 100 of a shape surrounding the pressure vessel along the outer periphery of the cylinder portion of the pressure vessel and It includes an upper band 300. The lower band 100 and the upper band 300 may be made of a metal material.

The lower band 100 is configured to have a seating surface formed in a shape corresponding to the outer peripheral surface of the pressure container so that the pressure container can be seated. In addition, the upper band 300 has a structure surrounding the pressure vessel from the upper side of the pressure vessel opposite the lower band 100. The upper band 300 and the lower band 100 may be fixed to each other by a fixing unit.

More specifically, the lower band 100 may include a seating part 110 constituting a seating surface of the pressure vessel and a pair of fastening ends located on both sides of the seating part 110.

Likewise, the upper band 300 may also include a close contact portion 310 and a pair of fastening ends positioned on both sides of the close contact portion 310 while surrounding the upper outer circumferential surface of the pressure vessel. At this time, the fixing unit is to secure the upper band 300 and the lower band 100 through each fastening end.

In addition, between the lower band 100 and the outer peripheral surface of the pressure vessel, the lower buffer band 200 is inserted and fixed, and between the upper band 300 and the outer peripheral surface of the pressure vessel, the upper buffer band 400 is inserted and fixed. Can be. The lower buffer band 200 and the upper buffer band 400 may be formed of a material having elasticity, preferably made of rubber. The upper buffer band 400 and the lower buffer band 200 prevent the pressure vessel from directly contacting the upper band 300 and the lower band 100 made of metal, thereby preventing damage to the surface of the pressure vessel while expanding during filling. , It serves to absorb some of the displacement of the contracted pressure vessel.

Meanwhile, the upper band 300 and the lower band 100 may be mounted directly on the vehicle body side or fixed on the vehicle body side as other members mounted on the vehicle body side are fastened together as in FIGS. 1 and 2. . For example, as shown in Figures 1 and 2, the horizontal member 800 is formed extending along the axial direction of the pressure vessel is located between the lower band 100 and the upper band 300, the fixed unit It can be configured to be fixed together. At this time, the horizontal member 800 is mounted on the vehicle body side.

The upper band 300 and the lower band 100 form two fastening points and are fastened to each other. For convenience, the right fastening position in FIG. 2 is called a first fastening position (E ₁ ), and the left fastening in FIG. 2 The position is referred to as a second fastening position (E ₂ ). In the first fastening position (E ₁ ), the upper band 300 and the lower band 100 may be fastened by the first fastening unit 600, and in the second fastening position (E ₂ ), the second fastening unit ( 500), the upper band 300 and the lower band 100 may be fastened.

According to a preferred embodiment of the invention, one of the two fastening positions must be located above the horizontal center line l ₁ of the pressure vessel. On the other hand, the second fastening position may be configured to be located below the horizontal center line, opposite the first fastening position (for reference, l ₂ in FIG. ₂ is a vertical center line).

The design of the fastening position is to secure the assembling property when fastening and to maximize the utilization of the internal space in consideration of the cylinder shape of the pressure vessel. When assembling the upper band 300 and the lower band 100, in order to secure sufficient rigidity and durability, it is preferable that two fastening positions are located opposite to each other based on the center of the tank.

In this regard, when the fastening position is configured by precisely matching the horizontal center line side, an additional space for fastening is required, and thus, it is not suitable as a fastening structure of a pressure vessel installed in a vehicle interior space.

Therefore, in order to properly secure the idle space of the cylinder-shaped pressure vessel and to effectively fix the pressure vessel, in a preferred embodiment of the present invention, one fastening position is formed above the horizontal center line of the pressure vessel, Another fastening position is formed below the horizontal center line of the convenience.

On the other hand, when the band fastening point is configured above the horizontal center line, a gap is generated between the pressure vessel and the lower band 100 and the lower buffer band 200, and foreign matter such as metal and stone is deposited from the outside depending on vehicle conditions. Can be. The introduced foreign matter may damage the surface of the pressure vessel during repeated expansion and contraction of the pressure vessel, which is a potential risk factor that may shorten the life of the pressure vessel.

In a preferred embodiment of the present invention, the insert member 900 is configured to be inserted into the corresponding space in order to prevent such foreign matter from being deposited. The insert member 900 may be formed of a material having elasticity that can be deformed according to the expansion and contraction of the pressure vessel, and preferably, a light and elastic material such as sponge, rubber, foamable polyurethane, and the like can be used. Therefore, the insert member 900 according to the present embodiment does not deviate from the first fastening position, as it is sufficiently squeezed and fixed in the space between the pressure vessel, the lower band 100 and the lower buffer band 200, and between them It should be configured to remove the space where foreign matter can be deposited.

More specifically, as shown in FIG. 2, the lower band 100 is a pair of lower portions extending toward the first fastening position and the second fastening position with respect to the seating portion 110 supporting the pressure vessel, respectively. It comprises a fastening end. Here, in the case of the second fastening position, since it is located below the horizontal center line of the pressure vessel, there is no space to deposit foreign substances between the lower band 100 and the pressure vessel. Accordingly, according to a preferred embodiment of the present invention, the lower band 100 has only the second lower fastening end 140 which is bent near the second fastening position and extends outwardly of the pressure vessel.

On the other hand, in the vicinity of the first fastening position, the extension portion 120 is formed extending in a generally vertical direction from the seating portion 110 and the first portion is bent in the extension portion 120 is formed to extend out of the pressure vessel It comprises a lower fastening end 130. That is, in the case of the first fastening position, since it is located above the horizontal center line, in consideration of assemblability, a portion in which the lower band 100 extends above the horizontal center line does not adhere to the outer peripheral surface of the pressure container, and Configured to fall. Therefore, in the vicinity of the first fastening position, an extension 120 extending in a generally vertical direction is formed, and at a height according to the first fastening position, the first lower fastening end 130 is bent from the extension 120. Is formed. On the other hand, the upper band 300 has a first upper fastening end 320 that is bent in the vicinity of the first fastening position and extends to the outside of the pressure vessel.

Therefore, in the vicinity of the horizontal center line, a space between the extension part 120 of the lower band 100 and the pressure vessel is gradually widened toward the upper side, and the insert member 900 is used to prevent foreign matter deposition in this space. Is inserted.

3 is an enlarged view of a fastening portion on a horizontal center line in the cross-section of FIG. 2, illustrating the function of the insert member 900. As shown in FIG. 3, in the first fastening position located above the horizontal center line of the pressure vessel, the insert member 900 is inserted and fixed in the space between the lower band 100 and the pressure vessel while depositing foreign matter in the interior space. Will be prevented.

In particular, as the insert member 900 is extended to contact one end of the lower buffer band 200, it is in close contact with the outer peripheral surface of the extension portion 120 and the pressure vessel of the lower band.

In particular, the insert member 900 may be composed of an elastic member that is securely fixed to the lower band 100 and the pressure vessel, and preferably fits into the space between the lower band 100 and the pressure vessel. Insert can be fixed. That is, the insert member 900 can be made thicker than the gap between the outer circumferential surface of the pressure vessel and the lower band 100, and is compressed and fixed to both members by using the inherent elasticity of the insert member 900.

More preferably, as shown in Figure 3, the insert member 900 may be configured in a wedge shape that fits into the space between the lower band 100 and the pressure vessel. The wedge-shaped insert member 900 is manufactured to have a large volume compared to the space between the final fastened upper and lower bands, and is inserted into the space in advance. Thereafter, as the first fixing unit 600 is assembled, its internal space is reduced, and the wedge-shaped insert member 900 is compressed to the adjacent members (compressed in the direction of the arrow) while sufficiently removing the internal space where foreign matter can be deposited. I can do it. In this case, as shown in Figure 3, the insert member 900 is fixed to the lower band 100, the upper band 300 and the pressure vessel, respectively.

In addition, FIG. 3 shows a first fixing unit 600 for fastening the upper band 300 and the lower band 100 at the first fastening position.

The first fixing unit 600 includes a first fixing bolt 610 penetrating the first lower fastening end 130 and the first upper fastening end 320 and a first fastening nut 620 fastened thereto. Including. Also, although not shown, a washer may be interposed between the first fixing bolt 610 and the first fixing nut 620. Meanwhile, the example of FIG. 3 shows an example in which the horizontal member 800 is inserted as a medium mounted on the vehicle body, and the horizontal member 800 is a hollow member, and the first pipe member 630 is provided in the interior space. The example inserted is shown. In this regard, the first pipe member 630 is inserted into the first fixing bolt 610 at a first fastening position, and supports the lower band 100 and the upper band 300 to secure the fastening structure. It is provided to improve the stiffness and durability.

On the other hand, the same structure can be applied to the second fastening position on the opposite side except for the insert member 900. However, as shown in FIG. 1, in the case of a structure for fixing two tanks, the lower band 100 has a W-type structure having a pair of seating surfaces to support a pair of pressure vessels. In this case, the fastening structure in the second fastening position should be configured as compactly as possible so that the two tanks can be placed in close contact.

That is, in the case of the second fastening position located in the center of the W-shaped lower band 100, compared to the first fastening position located at the outer end of the lower band 100, the pressure vessel volume must be reduced by reducing the space for installing the fixing unit. Can be as large as possible.

Accordingly, the upper band 300 has a second upper fastening end 330 having a hinge structure extending toward the second fastening position, and the second fixing unit 500 includes the second upper fastening end 330 It is hinged to), it may be composed of a second fixing bolt 510 penetrating the second lower fastening end 140 and a second fixing nut 520 fastened thereto. That is, the second fixing bolt 510 is configured as a T-type bolt, and the head portion of the T-type bolt is hinged to the second lower fastening end 140 to be configured.

On the other hand, the mounting bracket 700 shown in Figure 2 is a structure that is mounted on the vehicle body, a configuration for supporting the lower band 100. The second fixing bolt 510 may be configured to penetrate the mounting bracket 700 formed to extend parallel to the second lower fastening end 140 to be fastened to the second fixing nut 520. In addition, a spring member 550 may be inserted between the second fixing nut 520 and the mounting bracket 700, wherein the spring member 550 includes an upper buffer band 400 and a lower buffer band 200. With the expansion and contraction of the pressure vessel, the displacement of the vessel is absorbed.

Also, in the case of the second fixing bolt 510, as in the first fixing unit 600, the second pipe member 530 so as to support the lower band 100 and the mounting bracket 700. May be inserted, and the washer 540 may be inserted between the second fixing nut 520.

Meanwhile, in the example of FIG. 2, the lower band 100 and the upper band 300 are fastened by the first fixing unit 600 in the first fastening position, and in the second fastening unit 500 in the vicinity of the second fastening position. It shows an example of being fastened by. In this regard, the second fixing unit of the present invention need not necessarily include a configuration such as a second fixing bolt, a mounting bracket, as shown in FIG. 2, and can fasten the lower band 100 and the upper band 300. It should be construed to include other types of examples joined by other fastening elements. For example, the second fixing unit may be a hinge connecting the lower band 100 and the upper band 300.

4 is another embodiment of the present invention, and shows an example of configuring a fastening part by applying an insert member-integrated cushioning band, and FIGS. 5 and 6 illustrate embodiments of the insert-head integral cushioning band of FIG. 4. .

As shown in Figure 4, in another embodiment of the present invention, without using a separate insert member, in inserting and fixing the lower buffer band 200 between the pressure vessel and the lower band 100, injection, etc. It is also possible to configure to include an insert member-integrated cushioning band made to have a shape that can fill the gap by the method of. However, in the case of this embodiment, it may be disadvantageous in manufacturing method, weight, etc., compared to applying a light and highly elastic insert member.

The insert member-integrated cushioning band has a structure in which the head portion 220 that can be fixed in the inner space is integrally formed with the band body portion 210. The shape of the head portion 220 is not particularly limited, and is sufficiently compressed between the outer peripheral surface of the pressure vessel and the lower band 100 or in the inner space between the outer peripheral surface of the pressure vessel and the lower band 100 and the upper band 300. It may be configured in a shape that can be sufficiently compressed and fixed.

On the other hand, in the case of such an integrated buffer band, since there is a possibility of being detached due to permanent deformation or the like during long-term use, it is possible to adhere to peripheral parts or to apply a locking jaw structure for preventing departure.

In this regard, FIG. 5 is formed toward the contact surface with the lower band 100, and forms a pair of first locking jaws 230 on the left and right outer sides of the insert member-integrated cushioning band, so that the cushioning band is released by the locking jaws. This is an example of not being configured.

On the other hand, Figure 6 is another embodiment of the present invention, a pair of second locking formed on the left and right outer sides of the insert member-integrated buffer band toward the contact surface with the upper band 300 in addition to the lower first locking jaw 230 This is an example of forming the jaw 240.

As such, it is possible to prevent detachment of the insert member-integrated buffer band through the structure of forming the locking jaw, so that sufficient durability performance can be secured even during long-term use.

Although the present invention has been described with reference to preferred embodiments, those skilled in the art will appreciate that modifications and variations of elements of the invention are possible without departing from the scope of the invention. In addition, many modifications can be made to particular situations or materials without departing from the essential scope of the invention. Therefore, the present invention is not limited to the detailed description of the preferred embodiment of the present invention, but will include all embodiments within the scope of the appended claims.

100: lower band 110: seating
120: extension 130: the first lower fastening end
140: second lower fastening end 200: lower buffer band
300: upper band 310: close contact
320: first upper fastening end 330: second upper fastening end
400: upper buffer band 500: second fixing unit
510: second fixing bolt 520: second fixing nut
530: second pipe member 540: washer
550: spring member 600: first fixing unit
610: first fixing bolt 620: first fixing nut
630: first pipe member 700: mounting bracket
800: horizontal member 900: insert member
210: band body portion 220: head portion
230: first locking jaw 240: second locking jaw
V: Pressure vessel E ₁ : 1st fastening position
E ₂ : 2nd fastening position l ₁ : Horizontal center line
l ₂ : Vertical center line

Claims (16)

In the pressure vessel fixing device,
A lower band having a seating surface formed in a shape corresponding to the outer peripheral surface of the pressure container so that the pressure container can be seated;
A lower buffer band inserted between the lower band and the outer circumferential surface of the pressure vessel;
An upper band fixed to the lower band and surrounding the pressure vessel with the lower band while fixing in the circumferential direction;
An upper buffer band inserted between the upper band and the outer circumferential surface of the pressure vessel;
A first fixing unit for fastening the upper band and the lower band in a first fastening position; And
And a second fixing unit for fastening the upper band and the lower band at a second fastening position,
The first fastening position is located on the horizontal center line of the pressure vessel, the pressure vessel holding device characterized in that the insert member is inserted and fixed between the lower band and the pressure vessel of the first fastening position.
The method according to claim 1,
It is formed extending along the axial direction of the pressure vessel, and is sandwiched between the lower band and the upper band, further comprising a horizontal member fixed by the first fixing unit.
The method according to claim 1,
The lower band has a first lower fastening end that is bent near the first fastening position and extends outwardly of the pressure vessel,
The upper band has a first upper fastening end that is bent near the first fastening position and extends outwardly of the pressure vessel,
The first fixing unit comprises a first fixing bolt penetrating the first lower fastening end and the first upper fastening end and a first fixing nut fastened thereto.
The method according to claim 3,
In the first fixing bolt, a pressure vessel fixing device, characterized in that a first pipe member is inserted to support the lower band and the upper band in a first fastening position.
The method according to claim 1,
The insert member is an elastic member, the pressure vessel holding device characterized in that it is fixed in close contact with the lower band and the pressure vessel.
The method according to claim 5,
The insert member is fixed to the pressure vessel, characterized in that the insert is fixed to the space between the lower band and the pressure vessel.
The method according to claim 5,
The insert member is a pressure vessel holding device, characterized in that the wedge shape is fitted in the space between the lower band and the pressure vessel.
The method according to claim 1,
The insert member is an elastic member, and the pressure vessel holding device, characterized in that the bottom band, the top band and the pressure vessel are respectively fixed in close contact.
The method according to claim 1,
The lower band has a second lower fastening end that is bent near the second fastening position and extends outwardly of the pressure vessel,
The upper band has a second upper fastening end of a hinge structure extending toward the second fastening position,
The second fixing unit is hinged to the second upper fastening end, the pressure vessel holding device characterized in that it comprises a second fastening bolt and a second fastening nut fastened to the second lower fastening end.
The method according to claim 9,
Supporting the lower band, and further includes a mounting bracket mounted on the vehicle body,
The second fixing bolt is fastened to the second fixing nut through the mounting bracket formed to extend parallel to the second lower fastening end,
A pressure container fixing device, characterized in that a spring member is inserted between the second fixing nut and the mounting bracket.
The method according to claim 10,
In the second fixing bolt, a pressure vessel fixing device, characterized in that a second pipe member is inserted to support the lower band and the mounting bracket at a second fastening position.
The method according to claim 1,
The lower band has a W-shaped structure having a pair of seating surfaces to support a pair of pressure vessels, the first fastening position is located at an outer end of the lower band, and the second fastening position is the lower Pressure vessel holding device, characterized in that located in the center of the band.
The method according to claim 1,
The second fastening position is opposite to the first fastening position, the pressure vessel holding device, characterized in that located below the horizontal center line.
The method according to claim 1,
The lower buffer band is a pressure vessel holding device, characterized in that the insert member integral buffer band formed integrally with the insert member.
The method according to claim 14,
The insert member-integrated cushioning band is a pressure vessel fixing device, characterized in that it has a pair of first locking jaws formed to protrude toward the contact surface with the lower band.
The method according to claim 15,
The insert member-integrated cushioning band is a pressure vessel holding device, characterized in that it has a pair of second locking jaws formed to protrude toward the contact surface with the upper band.

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