阅读说明：本技术 户外取暖装置 (Outdoor heating device ) 是由 C·詹金斯 杨雄智 唐仁坤 于 2020-05-22 设计创作，主要内容包括：本申请公开了一种户外取暖装置,包括：炉头；够移动的底座；能够置于所述底座上的压缩燃气罐；相对于所述底座固定的立柱,所述户外取暖装置还包括旋转装置,所述旋转装置具有与所述炉头固定相连的第一部件以及与所述立柱固定相连的第二部件,所述第一部件能够在与所述立柱平行或非垂直的平面中绕一旋转轴线相对于所述第二部件旋转,所述户外取暖装置还包括燃气接头,所述燃气接头具有进气连接器以与所述压缩燃气罐气体连通以及出气连接器以与所述炉头气体连通,所述进气连接器与所述出气连接器气密性连接,所述燃气接头至少部分地穿过所述旋转装置延伸,并且所述出气连接器能够绕同一旋转轴线相对于所述进气连接器自由旋转。(The application discloses outdoor heating installation includes: a furnace end; a movable base; a compressed gas canister disposable on the base; a column fixed with respect to the base, the outdoor heating installation further comprising a rotary device having a first part fixedly connected with the burner and a second part fixedly connected with the column, the first part being rotatable with respect to the second part about an axis of rotation in a plane parallel or non-perpendicular to the column, the outdoor heating installation further comprising a gas joint having an inlet connector for gas communication with the compressed gas tank and an outlet connector for gas communication with the burner, the inlet connector being connected gas-tightly with the outlet connector, the gas joint extending at least partially through the rotary device, and the outlet connector being freely rotatable with respect to the inlet connector about the same axis of rotation.)

1. An outdoor heating installation (100), comprising:

a furnace head (60);

a movable base (10);

a compressed gas canister capable of being placed on the base (10); and

-a stand (50) fixed with respect to the base (10), characterized in that the outdoor heating installation (100) further comprises a rotation device (80), the rotation device (80) having a first part fixedly connected with the burner (60) and a second part fixedly connected with the stand (50), the first part being rotatable with respect to the second part about an axis of rotation in a plane non-perpendicular to the stand (50), the outdoor heating installation (100) further comprising a gas joint (90) having an inlet connector (91) for gas communication with the compressed gas tank and an outlet connector for gas communication with the burner (60), the inlet connector (91) being connected gas-tightly with the outlet connector, the gas joint (90) extending at least partially through the rotation device (80), and the outlet connector is freely rotatable about the same axis of rotation with respect to the inlet connector (91).

2. An outdoor heating unit (100) according to claim 1, characterized in that said first member comprises a first disc and said second member comprises a second disc, said two discs being parallel to each other and having centrally coinciding openings defined therein, said gas connections (90) passing through said openings.

3. Outdoor heating installation (100) according to claim 1, characterised in that the first part rotates relative to the second part about the axis of rotation in a plane parallel to the upright (50).

4. An outdoor heating unit (100) according to claim 1, 2 or 3, wherein said gas joint (90) further comprises a cylinder (93), said cylinder (93) being formed with an inner hollow space (93a), said outlet connector (94) being partially inserted into said inner hollow space (93a) and being screw-connected with said cylinder (93).

5. Outdoor heating installation (100) according to claim 4, characterized in that the air inlet connector (91) is partially inserted into the inner hollow space (93a) of the cylinder (93), the cylinder (93) being rotatable about the axis of rotation relative to the air inlet connector (91).

6. An outdoor heating unit (100) according to claim 5, wherein the end of the air inlet connector (91) inserted into the inner hollow space (93a) is formed with a plurality of axially spaced grooves (91d) on the outer surface to receive a plurality of annular sealing rings (99), respectively, to seal between the inner wall of the inner hollow space (93a) and the end of the air inlet connector (91).

7. Outdoor heating installation (100) according to claim 6, characterized in that the air inlet connector (91) is formed on its outer surface, close to said end, with an annular recess (91b) of greater radial depth than said groove, said cylinder (93) being provided with two or more screws (96) projecting radially from said cylinder (93) into said annular recess (91b) without contacting the radially innermost side of said annular recess (91b) to prevent the cylinder (93) from axially disengaging from the air inlet connector (91).

8. Outdoor heating installation (100) according to claim 7, characterized in that annular ramps are formed between the outlet connector (94) and the inner wall of the inner hollow space (93a) facing each other, such that when the outlet connector (94) is screwed to the cylinder (93), the annular ramps contact each other to create at least one contact sealing surface (93-94-1 or 93-94-2) between the outlet connector (94) and the inner wall of the inner hollow space (93 a).

9. Outdoor heating installation (100) according to claim 8, characterised in that the cylinder (93) is provided on its outer surface with a thread, in a position corresponding to where the outlet connector (94) is in threaded engagement with the cylinder (93), and in that a nut (95) formed of a material harder than the cylinder (93) can be screwed onto the thread of the outer surface of the cylinder (93).

10. An outdoor heating unit (100) according to claim 2 or 3, wherein said first pan comprises a support sheet (86), said support sheet (86) extending axially for a length to at least partially axially overlap said gas burner (90) and being fixedly connected to said burner (60).

11. Outdoor heating device (100) according to claim 10, characterized in that the upright (50) comprises two fixed flaps (51a, 51b), the support flap (86) being two support flaps (86) radially symmetrically distributed, one flap of the two flaps (51a, 51b) being contactable with a respective one of the two support flaps (86) to define a rotational position of the burner (60).

12. An outdoor heating installation (100) according to claim 11, characterized in that the burner (60) can rotate and stay in a horizontal or vertical position when the outdoor heating installation (100) is standing on the ground.

13. An outdoor heating installation (100) according to claim 1, 2 or 3, characterized in that said upright (50) comprises a connection box (51) fixed thereto, said second component being fixed to said connection box (51).

Technical Field

The present application relates generally to outdoor heating devices, and more particularly to outdoor gas heaters.

Background

In the season of low temperature, people usually adopt a heating device to prevent cold in order to have dinner or meet outdoors. Outdoor heating devices for domestic use are generally of a relatively heavy weight, having a base and a burner. Traditionally, the jambs are horizontal and thus occupy a large volume of space. In addition, the horizontal furnace end is not favorable for the standing user to quickly heat.

Disclosure of Invention

The application aims at providing a modified outdoor heating installation for can reduce the occupation space volume of device and conveniently accomodate, and can conveniently adjust the heat radiation region to the user of different gestures, convenient to use person is nimble to keep warm.

According to an aspect of the present application, there is provided an outdoor heating apparatus, including:

a furnace end;

a movable base;

a compressed gas canister disposable on the base; and

a column fixed with respect to the base, the outdoor heating installation further comprising a rotary device having a first part fixedly connected with the burner and a second part fixedly connected with the column, the first part being rotatable with respect to the second part about an axis of rotation in a plane parallel or non-perpendicular to the column, the outdoor heating installation further comprising a gas joint having an inlet connector for gas communication with the compressed gas tank and an outlet connector for gas communication with the burner, the inlet connector being connected gas-tightly with the outlet connector, the gas joint extending at least partially through the rotary device, and the outlet connector being freely rotatable with respect to the inlet connector about the same axis of rotation. Like this, the furnace end can rotate for the stand as required to at the device during operation, the infrared heat radiation energy that sends from the furnace end can change the distribution direction as required, is favorable to expanding outdoor heating installation's application scenario. In addition, the design of the gas joint ensures that the gas supply connecting pipe cannot be wound and cause accident danger. In addition, when outdoor heating installation was out of work, because the furnace end can rotate, can conveniently accomodate this kind of outdoor heating installation.

Optionally, the first component comprises a first disc and the second component comprises a second disc, the two discs being parallel to each other and defining a centrally coincident opening in the two discs through which the gas fitting passes.

Optionally, the gas joint further comprises a barrel formed with an internal hollow space, the outlet connector being partially inserted into the internal hollow space and threadedly connected with the barrel.

Optionally, the air inlet connector is partially inserted into the interior hollow space of the barrel, the barrel being rotatable relative to the air inlet connector about the axis of rotation.

Optionally, the end of the air inlet connector inserted into the hollow interior space is formed with a plurality of axially spaced grooves on an outer surface to respectively receive a plurality of annular sealing rings to seal between the hollow interior wall of the interior space and the end of the air inlet connector.

Optionally, the air inlet connector is formed on its outer surface adjacent the end with an annular recess of greater radial depth than the groove, the barrel being provided with two or more screws projecting radially from the barrel into the annular recess but not contacting the radially innermost side of the annular recess to prevent axial removal of the barrel from the air inlet connector.

Optionally, annular ramps are formed between the outlet connector and the inner wall of the internal hollow space facing each other such that when the outlet connector is screwed into the barrel, the annular ramps contact each other to create at least one contact sealing surface between the outlet connector and the inner wall of the internal hollow space.

Optionally, the outer surface of the barrel is provided with a thread at a location corresponding to where the outlet connector is in threaded engagement with the barrel, and a nut formed of a harder material than the barrel is capable of being screwed onto the thread of the outer surface of the barrel.

Optionally, the first disk body comprises a support plate extending axially a length to at least partially axially overlap the gas burner and fixedly connect to the burner.

Optionally, the upright column includes two fixed blocking pieces, the two supporting pieces are radially and symmetrically distributed, and one of the two blocking pieces can be in contact with a corresponding one of the two supporting pieces to define a rotation position of the burner.

Optionally, the burner can be rotated and stay in a horizontal or vertical position when the outdoor heating unit is standing on the ground.

Optionally, the upright comprises a junction box secured thereto, the second component being secured to the junction box.

Adopt above-mentioned technical means of this application, the furnace end of outdoor heating installation can the relative rotation and can ensure simultaneously that the furnace end can not take place to twine with compressing between the gas jar, still ensured its security when improving outdoor heating installation and using the flexibility.

Drawings

The principles and aspects of the present application will be more fully understood from the following detailed description, taken in conjunction with the accompanying drawings. It is noted that the drawings may not be to scale for clarity of illustration and will not detract from the understanding of the present application. In the drawings:

fig. 1 is a perspective view schematically illustrating an outdoor heating apparatus according to an embodiment of the present application;

FIG. 2 is an exploded view schematically illustrating the outdoor heating installation of FIG. 1;

FIG. 3 schematically illustrates one example of a rotary device employed in the outdoor heating apparatus of the present application;

fig. 4 schematically illustrates the burner of the outdoor heating installation of the present application at different angles of rotation relative to the base;

fig. 5(a) and 5(b) schematically show how the burner is mounted on the column using a rotating device and rotated by different angles, respectively;

FIG. 6 is a perspective view schematically illustrating a gas joint according to an embodiment of the present application;

FIG. 7 schematically illustrates the connection of a bellows for gas supply to a gas junction; and is

Fig. 8 is an axial sectional view schematically showing an axial sectional view of the gas joint of fig. 6.

Detailed Description

In the various figures of the present application, features that are structurally identical or functionally similar are denoted by the same reference numerals.

Fig. 1 schematically illustrates an outdoor heating installation 100 according to one embodiment of the present application. As shown, the outdoor heating unit 100 generally includes a base 10, a wheel set 20 secured to the base 10, a casing 30 positioned on the base 10, an elongated support column 50 secured relative to the base 10 via a bracket 40 (fig. 2), and a burner 60 mounted on the support column 50. The wheel set 20 is provided with wheels and is fixed to the lower side of the base 10 so that a user can pull the mobile outdoor heating apparatus 100. With further reference to fig. 2, a bracket 40 may be secured to the base 10 via screws. For example, the bracket 40 has three legs, which are conveniently fixed to the base 10 via screws.

The housing 30 is sized to be slightly larger than the volume of space occupied by the bracket 40 so that, when installed in place, the bracket 40 is enclosed and hidden by the housing 30. For example, an opening 31 may be formed in the casing 30, the opening 31 being sized so that the post 50 can pass through it so that the casing 30 can be moved up and down the post 50 as desired at any time after the device 100 is assembled in place.

The top of the bracket 40 is adapted to be bolted to the bottom of the column 50. The outdoor heating apparatus 100 further includes a compressed gas tank (not shown) for supplying gas to the burner 60. Each leg of the bracket 40 is configured to receive and provide protection for the compressed gas canister from external impacts. Thus, after the device 100 is assembled in place, the user can manually lift the housing 30, place the compressed gas canister in the space enclosed by the bracket 40 and properly adjust it, and then lower the housing 30.

Alternatively, to ensure the stability of the outdoor heating apparatus 100 during operation, the base 10 itself may be made of a heavier metal or otherwise provided with a counterweight. In addition, an edge matching the shape of the lower opening of the cover 30 may be formed on the top surface of the base 10, thereby preventing the cover 30 from being freely rotated about the pillar 50 after being seated on the base 10.

The burner 60 includes a housing 61 and a core 62 mounted within the housing 61. In the embodiment of the present application, the wick 62 may be, for example, a burner that relies on gas combustion to generate heat infrared rays to the outside for the purpose of heating. An opening is provided in the case 61, and the thermal infrared rays generated by the wick 62 are mainly radiated outward through the opening. In order to prevent the furnace core 62 from being damaged by foreign matter, a metal protective mesh 70 is disposed on the casing 61 to cover the opening.

A control box 52 may be provided on the column 50. For example, an igniter may be provided on the control box 52 for controlling the operation of the wick 62. The control box 52 may be fixed on the column 50 via screws, and control wires of an igniter of the control box 52 may be threaded in an inner hollow space of the column 50 to be connected with relevant components such as the furnace core 62.

As shown, the burner 60, and particularly the core 62, is elongated. This means that when the core 62 is operated, thermal infrared rays are emitted from the burner 60 in a narrow range. Therefore, if a user stands in front of the outdoor heating apparatus 100, it is desirable to receive as much thermal infrared radiation energy as possible in the height direction while the apparatus is operating. It is desirable to ensure that as many people receive the thermal infrared radiant energy as possible in the lateral direction if several users stand or sit in front of the outdoor heating apparatus 100. In addition, the outdoor heating device 100, in particular, the burner 60 occupies a large space, and therefore, it is desirable that the size of the occupied space of the device can be changed as much as possible when the outdoor heating device 100 does not operate, so that the device is convenient to store or load and transport.

For this reason, according to an embodiment of the present application, the burner 60 is rotatably mounted on the column 50 via a rotating device 80, so that the burner 60 can be rotated relative to the column 50 as required. In particular, the jamb 60 rotates relative to the upright 50 in a plane parallel or non-perpendicular to the upright 50. In the context of the present application, a plane parallel or non-perpendicular to the column 50 means that the plane is parallel or non-perpendicular to the longitudinal axis of the column 50. Thus, as shown in fig. 4, the burner 60 can be rotated relative to other parts of the outdoor heating apparatus 100, such as the column 50, the base 10, and the like. For example, when the base 10 of the outdoor heating apparatus 100 is placed on the ground, the burner 60 can be rotated to a horizontal position and a vertical position, respectively.

Fig. 3 schematically shows an example of a rotating device 80 according to the present application. For clarity, the portions of the rotating device 80 that are used to connect the jamb 60 and the column 50, respectively, are not shown (see fig. 5(a) and 5(b) below). The rotating device 80 substantially comprises two discs 81 and 83 parallel to each other. The disk 83 has a centrally located rim 84. The rim 84 extends perpendicularly from the plane of the disc 83. A hollow opening 85 is defined in the rim 84 for passage of a gas fitting 90 as described below. The center axis of the rim 84 coincides with the axis of rotation of the disk 81 with respect to the disk 83, i.e., the rotation center axis of the rotating device 80. The cartridge rim 84 has an axial length. The tray 81 has a central opening such that the cartridge rim 84 can be inserted into the central circular opening of the tray 81. The rim 84 is also threaded on its outer surface from the distal end towards the disc 83 so that the nut 82 can be screwed onto the threads of the rim 84 after the disc 81 is slipped onto the rim 84. The radially outer dimension of the nut 82 is set larger than the opening diameter of the disk 81, thereby ensuring that the disk 81 does not come off after the nut 82 is screwed on the thread of the rim 84. The opening diameter of the disc body 81 is set slightly larger than the outer diameter of the rim 84, which ensures that the disc body 81 is freely rotatable with respect to the disc body 83 after being mounted.

In order to ensure that the rotation between the disks 81 and 83 can have a certain damping property so that the burner 60 can be conveniently stopped at an arbitrary rotational position, a motion damping member may be further provided between the disks 81 and 83. For example, as one example, the motion damper may be a damper sheet having a certain thickness interposed between the disks 81 and 83. Thus, by adjusting the axial force applied between the discs 81 and 83 by means of the nut 82, the frictional force affecting the damping fins, between the discs 81 and 83, can be adjusted accordingly, providing a damping effect for the rotational movement of the rotating means 80.

The rotation means 80 is located between the burner 60 and the upright 50, so that one disc 81 or 83 is fixed with respect to the burner 60 and the other disc 83 or 81 is fixed with respect to the upright 50, achieving a rotation of the burner 60 with respect to the upright 50. In particular, the disk fixed with the burner 60 rotates about a central axis of rotation in a plane parallel or non-perpendicular to the upright 50 with respect to another disk fixed with the upright 50. Further referring to fig. 5(a) and 5(b), the right part of each figure is an enlarged view (with the burner 60 portion omitted) of the dashed box of the left part. The column 50 is provided with a connection box 51 as a part thereof. For example, the connection box 51 may be fixed on the surface of the pillar 50 by a screw. One disc of the rotating means 80 is fixed to said connection box 51 so as to be non-rotatable with respect to the upright 50. The other disc of the rotating device 80 is extended to form a support plate 86. For example, two support pieces 86 are provided, each extending from the outer periphery of the disk body at a position axially symmetrical to the disk body by 180 degrees. Each support tab 86 has a length extending in an axial direction. The support piece 86 has a hole at a distal end thereof so as to be fixed to the housing 61 of the burner 60 by a screw. For example, when secured to the housing 61 of the burner 60, the two support tabs 86 are distributed along the longitudinal length of the burner 60.

In order to allow the jamb 60 to be rotatably retained in different positions with respect to the column 50, two flaps 51a and 51b are provided on the connection box 51. The two flaps 51a and 51b have a free end axial position at least beyond the support tab 86, so that the disc provided with the support tab 86 cannot rotate 360 ° with respect to the upright 50, but only within the maximum angular range specified by the two flaps 51a and 51 b. The position of the two flaps 51a and 51b on the connection box 51 is such that one of the flaps 51a and 51b can come into contact with one of the support pieces 86 when the burner 60 is rotated to a certain position relative to the upright 50. For example, as shown in fig. 5(b), in a rotational position of the burner 60 at substantially 90 degrees relative to the column 50 (i.e., the burner 60 is in a horizontal position as shown in fig. 4), one support piece 86 contacts the flap 51 b; as shown in fig. 5(a), the other support piece 86 contacts the stopper piece 51a in a rotational position of the burner 60 at substantially zero degrees with respect to the column 50 (i.e., the burner 60 is in a vertical position as shown in fig. 4). In an alternative embodiment, the flaps 51a and 51b may also be fixedly arranged on another disc of the rotating device 80 than the disc provided with the support flap 86.

While the design of the flaps 51a and 51b ensures that the rotating means 80 can stay in the desired rotational position, it will be clear to those skilled in the art that other designs that achieve a relative temporary position lock between the discs of the rotating means 80 may alternatively be used. For example, according to an alternative embodiment, it is possible to eliminate the flaps 51a and 51b and design a plurality of recesses and projections respectively engageable with each other on the facing surfaces of the two trays 81 and 83 of the rotating device 80, for example, the number of projections is smaller than the number of recesses, and they are distributed in the circumferential direction, so that when the two trays 81 and 83 are relatively rotated to a certain position, all the projections can be received in the corresponding recesses, and when rotated to another position, all the projections can be received in the recesses which do not pass, thereby ensuring temporary position locking between the trays.

According to an embodiment of the present application, the gas joint 90 partially passes through the central opening 85 of the rotating device 80. Meanwhile, because the supporting plate 86 has a certain axial length, the design can ensure that the gas joint 90 is always surrounded by the rotating device 80 and partially overlapped with the supporting plate 86 in the axial direction after the outdoor heating device 100 is assembled in place, thereby reducing the possibility that the gas joint 90 is damaged due to external impact and improving the safety of the whole device. Furthermore, the design of the gas joint 90 in the rotary device 80 also ensures that the risks associated with damage to the gas supply line due to rotation of the burner 60 relative to the column 50 are not present, thus improving the safety of the entire device.

Fig. 6 schematically illustrates a perspective view of a gas joint 90 according to an embodiment of the present application. The gas joint 90 comprises an air inlet connector 91 and a cylinder 93 rotatably sleeved on the air inlet connector 91, and an air outlet connector 94 is arranged at the other end of the cylinder 93 opposite to the air inlet connector 91. The air inlet connector 91 is formed with a hollow interior passage 91a (fig. 8). The outlet connector 94 is formed with a passage 94a (fig. 8) having a hollow interior. An internally hollow space 93a is also formed in the cylinder 93 so that the passages 91a, 94a and the space 93a communicate with each other after the inlet connector 91, the cylinder 93 and the outlet connector 94 are connected to each other in place as described below.

Referring further to fig. 6, a fixing portion 92 is integrally formed on the air inlet connector 91. The fixing portion 92 is used to fix the air inlet connector 91 to the column 50, and may be fixed to the connection box 51 of the column 50 by a screw, for example. Near the end of the barrel 93 adjacent the air inlet connector 91, a stop screw 96 is threaded into the barrel 93 for preventing the air inlet connector 91 from disengaging from the barrel 93 as described below. In the present example, the air inlet connector 91 is substantially L-shaped, ensuring that a bellows for air supply can be conveniently connected when it is partially in the internal hollow space of the column 50. In an embodiment of the present application, the bellows for supplying gas may be a metal bellows, and thus may be bent accordingly as needed; other bellows can be used for supplying the compressed gas. The corrugated pipe is provided at both ends thereof with connection ends so as to be detachably connected to corresponding joints or a compressed gas tank or a burner.

Fig. 7 schematically shows two bellows 97, 98 connected to the gas connection 90. For example, bellows 97 is connected to the gas inlet connector 91 of the gas connector 90. Therefore, an internal thread is provided on one connecting end 97a of the bellows 97, and an external thread is provided on the outer surface of the air inlet connector 91, so that both can be connected together air-tightly by screwing. A screw thread is also provided on the opposite connection end 97b of the bellows 97 for connection to the compressed gas tank via a gas distribution valve or other necessary components; similarly, a bellows 98 may be connected between the gas joint 90 and the wick 62, so that gas supply from a compressed gas tank (not shown) to the wick 62 may be achieved. The bellows 97 may be inserted into the inner hollow space of the pillar 50.

With further reference to FIG. 8, two axially spaced annular grooves 91d are formed in the outer surface of the end 91c of the air inlet connector 91 that projects into the barrel 93. The two annular grooves 91d accommodate the annular sealing rings 99 in a distributed manner, so that after the end portions 91c project into the hollow space 93a of the interior of the cylinder 93, the annular sealing rings 99 respectively seal in an airtight manner against the inner wall of the space 93 a. The end 91c is radially sized so that the cylinder 93, which is disposed over the end 91c, is free to rotate. It should be clear to those skilled in the art that the air inlet connector 91 of the present application is not limited to providing only two annular grooves 91d, and designs of three or more annular grooves 91d are also contemplated. The design of the plurality of annular grooves 91d and the annular sealing ring 99 requires that the end portion 91c has a certain axial length in the inner hollow space 93a of the cylinder 93, which ensures that tilting about the central axis is avoided affecting the rotation when the cylinder 93 is rotated about the central axis. In addition, the design of the plurality of annular seal rings 99 also ensures airtightness on the side of the intake connector 91.

Near the end 91c, an annular recess 91b is formed on the outer surface of the air inlet connector 91. The radial depth of the annular recess 91b is greater than the annular groove 91 d. Two limit screws 96 are respectively screwed into the cylinder 93 from the outside inwards in a radial symmetry manner on the cylinder 93. The two screws 96 can be screwed in to such a depth that the ends of the screws can radially extend into the annular recess 91b but do not contact the radially innermost side of the annular recess 91 b. Thus, the ends of the two screws 96 extending into the recesses 91b will axially contact the end 91c of the inlet connector 91, thereby blocking the barrel 93 from disengaging the inlet connector 91. It will be clear to those skilled in the art that more or fewer screws 96 are possible.

The end of the outlet connector 94 projecting into the hollow interior space 93a of the cylinder 93 is formed with external threads which can engage internal threads provided in the end of the cylinder 93 opposite the inlet connector 91 so that the end of the outlet connector 94 can be screwed into the hollow interior space 93 a. In order to ensure airtightness between the outlet connector 94 and the cylinder 93, as shown in the enlarged views of the two circles in fig. 8, a ring of flange 93b is formed on the inner wall of the inner hollow space 93a so that when the end of the outlet connector 94 is screwed into the inner hollow space 93a, the outer chamfered surface of the end can be brought into press contact with a ring of inclined surface of the ring of flange 93b toward the end to form a contact sealing surface 93-94-1. Furthermore, a ring of flange 94b may be formed on the outer surface of the outlet connector 94 so that when the end of the outlet connector 94 is screwed into the inner hollow space 93a, a ring of inner inclined surface on the inner wall of the end of the inner hollow space 93a can be pressed into contact with a ring of inclined surface of the ring of flange 94b facing the cylinder 93 to form another contact sealing surface 93-94-2. To ensure the press contact airtightness, the cylinder 93 and the outlet connector 94 may be made of a metal that can be slightly deformed after being pressed, such as copper. Further, the end of the outlet connector 94 inserted into the inner hollow space 93a may be formed to slightly radially expand in a direction away from the cylinder 93 or the threaded hole of the cylinder 93 receiving the outlet connector 94 may be formed to slightly radially narrow in a direction toward the cylinder 93, so that screwing to the cylinder 93 may cause the cylinder 93 to slightly radially expand outward. Meanwhile, in order to suppress such radial expansion and thus ensure airtightness of the connection, an external thread is further formed at a position of an outer surface of the cylinder 93 corresponding to the end of the screwed outlet connector 94 so that the nut 95 can be screwed thereon. Preferably, the nut 95 may be made of a harder material than the cylinder 93, so as to be able to inhibit the deformation of the outlet connector 94 after it has been screwed into the cylinder 93 and thus ensure the tightness of the connection.

In the technical scheme of this application, the rotation central axis of barrel 93 coincides with rotary device 80's rotation central axis, and when furnace end 60 was rotated for stand 50 like this, two bellows 97 and 98 that link to each other with gas joint 90 can remain the position motionless respectively, have avoided causing the unable rotation of furnace end 60 or even the bellows to cause the winding to break the accident that the gas leaked because of the rotation of bellows winding.

It will be apparent to those skilled in the art that the outlet connector 94 may be integrally formed with the barrel 93 as a one-piece outlet connector, thus eliminating the design described above in connection with the threaded connection and the contact sealing surfaces 93-94-1 and 93-94-2; in this case, the outlet connector and the inlet connector axially at least partially coincide. In an alternative embodiment, the air-tight connections of the inlet connector 93 and the outlet connector 94 may be interchanged with one another. Furthermore, although in the above described embodiment the inlet connector is inserted into the barrel 93, it will be clear to the skilled person that in an alternative embodiment the barrel could be designed to be inserted into the inlet connector and that the design of figure 8 with respect to the annular groove 91d and the annular sealing ring 99 could be correspondingly modified to the outer surface of the barrel.

Although specific embodiments of the present application have been described herein in detail, they have been presented for purposes of illustration only and are not to be construed as limiting the scope of the application. Further, it should be clear to those skilled in the art that the various embodiments described in this specification can be used in combination with each other. Various substitutions, alterations, and modifications may be conceived without departing from the spirit and scope of the present application.