Movable fire-out head

Abstract

The utility model belongs to the technical field of heating devices, and particularly relates to a movable fire outlet head. In order to overcome the defect that a fire outlet component of an existing fire outlet head is fixed, the movable fire outlet head adopts the following technical scheme that the movable fire outlet head comprises a fire outlet head body provided with a main gas channel, a main fire outlet piece is arranged at a main gas outlet, and the main fire outlet piece is provided with a plurality of fire outlet holes; the movable fire outlet assembly comprises a movable gas outlet piece movably connected with the gun head body, a movable fire outlet piece is arranged at the movable gas outlet, and the movable fire outlet piece is provided with a plurality of fire outlet holes; and the movable gas outlet piece is switched between a fire outlet position and a separation position through sliding or swinging. According to the movable fire outlet head, the movable gas outlet piece and the movable fire outlet piece of the movable fire outlet assembly are movably connected with the fire outlet head body, so that the packaging and transporting size can be reduced, or when the fire outlet angle is larger than 180 degrees, the movable fire outlet head can be separated from a copper pipe in the radial direction.

Description

TECHNICAL FIELD

[0001] The utility model belongs to heating device technical field, specifically related to movable fire head. BACKGROUND

[0002] In the maintenance of refrigeration equipment, often need to heat copper pipe and so on operation, to realize the pipe, pipe expansion.

[0003] At present, the heating of copper pipe is mostly adopted by welding device without using special heating device. The fire head of welding device is mostly adopted by straight line of round pipe. The disadvantage of straight line of round pipe is that copper pipe is only heated in small part, and the local heating part is not heated uniformly.

[0004] In order to improve the heating effect, the fire head of part of copper pipe welding gun adopts hook structure, and a plurality of circumferentially distributed fire outlets are arranged on the hook structure. Although the hook fire head with a plurality of circumferential fire outlets can make the direct heating part more uniform, the fire part of the fire head adopts fixed type (the fire part is not movable), and there are problems such as large volume, the fire angle is greater than 180 degrees, and the copper pipe cannot be separated radially. INVENTION CONTENTS

[0005] The utility model provides a movable fire head to solve the problem that the fixed type of fire part of the existing fire head cannot be separated from the copper pipe radially when the fire angle is greater than 180 degrees.

[0006] In order to achieve the above object, the utility model adopts the following technical scheme: the movable fire head comprises:

[0007] The fire head main body comprises a main shell for forming a main gas channel, and the main gas channel comprises a main air inlet, a main air outlet and an end air outlet located at the end of the main air outlet.

[0008] The movable fire assembly comprises a movable air outlet connected with the fire head main body, and the movable air outlet has a movable gas channel communicated with the end air outlet of the main gas channel, and the movable gas channel comprises a movable air inlet and a movable air outlet.

[0009] The movable fire assembly is switched between the fire position and the separation position by sliding or swinging.

[0010] The movable fire head of the utility model comprises a fire head main body and a movable fire assembly, the movable air outlet of the movable fire assembly and the movable fire part are movably connected with the fire head main body, so as to reduce the packaging and transportation volume (such as the movable fire part sliding with the fire head main body) or realize the radial separation (sliding or swinging can be realized) with the copper pipe (or other material pipe) when the fire angle is greater than 180 degrees.

[0011] As an improvement, the fire head body further comprises a main arc-shaped fire outlet arranged at the main air outlet of the main shell, the main arc-shaped fire outlet having a plurality of main fire outlet holes; and / or,

[0012] The movable fire outlet assembly further comprises a movable arc-shaped fire outlet arranged at the movable air outlet, the movable arc-shaped fire outlet having a plurality of movable fire outlet holes.

[0013] As an improvement, the movable air inlet of the movable air outlet is always located in the main air channel, and the movable air outlet slides relative to the fire head body.

[0014] As an improvement, an arc-shaped guide structure is formed between the movable air outlet and the fire head body, the arc-shaped guide structure comprising an arc-shaped strip formed in the main air channel of the fire head body and an arc-shaped groove formed on the movable air outlet; and / or,

[0015] A separation-preventing structure is formed between the movable air outlet and the fire head body, the separation-preventing structure comprising a main hook portion formed by the main arc-shaped fire outlet at the end air outlet of the main air channel of the fire head body and a movable hook portion formed by the movable arc-shaped fire outlet at the movable air inlet of the movable air outlet.

[0016] As an improvement, the movable fire head further comprises a fire position maintaining assembly, the fire position maintaining assembly comprising a spring sheet, one end of the spring sheet being fixed to the fire head body and the other end being fixed to the end of the movable air outlet away from the fire head body; and / or,

[0017] The movable air outlet is maintained at the fire position by friction and / or elastic members.

[0018] As an improvement, the movable air outlet is sleeved outside the fire head body, and the movable air outlet swings relative to the fire head body.

[0019] As an improvement, the movable air outlet swings relative to the fire head body through a swinging assembly, the swinging assembly comprising a T-shaped hollow pipe and a rivet, the movable air outlet and the fire head body being sleeved in the small-diameter section of the T-shaped hollow pipe, and the rivet passing through the T-shaped hollow pipe at one end.

[0020] As an improvement, the movable fire head further comprises a fire position maintaining assembly, the fire position maintaining assembly comprising a force transmission assembly and an elastic member, the force transmission assembly comprising a first force transmission member and a second force transmission member, the first force transmission member being fixed to the fire head body, and the second force transmission member being fixed to the movable air outlet at one end, the elastic member abutting against the first force transmission member and the second force transmission member at two ends, and the elastic member generating an acting force for rotating the second force transmission member towards the fire head body; and / or,

[0021] The movable air outlet is maintained at the fire position by friction and / or elastic members; and / or,

[0022] The locking member is movably arranged along the thickness direction of the fire outlet head body, and is connected with the movable air outlet member and keeps the movable air outlet member in the fire outlet position.

[0023] As an improvement, when the movable air outlet member is in the fire outlet position, the end of the movable arc-shaped fire outlet member abuts against the end of the main arc-shaped fire outlet member; and / or,

[0024] The movable air outlet member comprises a base and a connecting portion extending from the end of the base, and a connecting hole is formed in the connecting portion for swing connection with the fire outlet head body, so that the movable air outlet member does not interfere with the fire outlet head body when swinging.

[0025] As an improvement, the fire outlet head body comprises a main shell for forming the main air passage, the main shell is welded by two main half shells, and the main arc-shaped fire outlet member is welded or clamped with the two main half shells; and / or,

[0026] The movable air outlet member is welded or clamped with the movable arc-shaped fire outlet member; and / or,

[0027] The end of the movable air outlet member away from the fire outlet head body is closed; and / or,

[0028] The fire outlet head body is provided with a main positioning groove, the main arc-shaped fire outlet member is provided with a main positioning portion positioned in the main positioning groove, the movable air outlet member is provided with a movable positioning groove, and the movable arc-shaped fire outlet member is provided with a movable positioning portion positioned in the movable positioning groove.

[0029] As an improvement, the main arc-shaped fire outlet member is in a grid shape or has a plurality of tubular fire outlet portions, and the movable arc-shaped fire outlet member is in a grid shape or has a plurality of tubular fire outlet portions.

[0030] The movable fire outlet head comprises a fire outlet head body and a movable fire outlet assembly, the movable air outlet member and the movable fire outlet member of the movable fire outlet assembly are movably connected with the fire outlet head body, the fire outlet head body can be radially moved relative to the copper pipe and separated from the copper pipe while realizing a larger angle of fire outlet compared with the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 is a structural schematic view of the fire outlet head of the embodiment one of the utility model (the movable fire outlet assembly is in the fire outlet position).

[0032] Figure 2 is an exploded view of the structure of the fire outlet head of the embodiment one of the utility model.

[0033] Figure 3 is a sectional view of the fire outlet head of the embodiment one of the utility model (the movable fire outlet assembly is in the fire outlet position).

[0034] Figure 4 is an exploded view of the structure of the fire outlet head body of the fire outlet head of the embodiment one of the utility model.

[0035] Figure 5 is the structural exploded view of the movable fire outlet assembly of the fire outlet head of the embodiment one of the utility model.

[0036] Figure 6 is the structural schematic view of the position keeping assembly of the fire outlet head of the embodiment one of the utility model.

[0037] Figure 7 is the structural schematic view of the fire outlet head of the embodiment two of the utility model (the movable fire outlet assembly is located at the fire outlet position).

[0038] Figure 8 is the structural exploded view of the fire outlet head of the embodiment two of the utility model.

[0039] Figure 9 is the structural exploded view of the fire outlet head main body of the fire outlet head of the embodiment two of the utility model.

[0040] Figure 10 is the structural exploded view of the movable fire outlet assembly of the fire outlet head of the embodiment two of the utility model.

[0041] Figure 11 is the structural exploded view of the swing assembly of the fire outlet head of the embodiment two of the utility model.

[0042] Figure 12 is the structural schematic view of the position keeping assembly of the fire outlet head of the embodiment two of the utility model.

[0043] Figure 13 is the sectional view of the fire outlet head of the embodiment two of the utility model.

[0044] Figure 14 is the sectional view when the fire outlet head of the embodiment one of the utility model adopts the main fire outlet piece with multiple edges.

[0045] Figure 15 is the sectional view when the fire outlet head of the embodiment two of the utility model adopts the main fire outlet piece with multiple edges.

[0046] In the figure, 01, fire outlet head main body;

[0047] 1, main shell;10, main gas passage;11, main half shell;12, arc-shaped strip;13, main positioning groove;14, mounting hole;15, main air inlet;16, main air outlet;17, end air outlet;

[0048] 2, main arc-shaped fire outlet piece;21, main fire outlet hole;22, main positioning part;23, main hook part;

[0049] 02, movable fire outlet assembly;

[0050] 3, movable air outlet; 30, movable air passage; 31, arc-shaped groove; 32, movable positioning groove; 33, base; 34, connecting part; 35, movable air inlet; 36, movable air outlet; 37, connecting hole;

[0051] 4, movable arc-shaped fire outlet; 41, movable fire outlet; 42, movable positioning part; 43, movable hook part;

[0052] 03, position maintaining assembly;

[0053] 5, spring sheet;

[0054] 61, nut; 62, screw; 63, special-shaped stud; 64, nut;

[0055] 7, elastic member;

[0056] 81, first force transmitting member; 82, second force transmitting member;

[0057] 04, swinging assembly;

[0058] 91, T-shaped hollow tube; 92, rivet. DETAILED DESCRIPTION

[0059] The technical solutions of the embodiments of the utility model are explained and described below, but the following embodiments are only preferred embodiments of the utility model, not all. Based on the embodiments in the embodiments, other embodiments obtained by those skilled in the art without creative labor are all within the protection scope of the utility model.

[0060] Referring to Figures 1 to 13 , the movable fire head of the embodiment of the utility model comprises:

[0061] The fire head main body comprises a main shell for forming a main air passage, and the main air passage comprises a main air inlet, a main air outlet and an end air outlet at the end of the main air outlet.

[0062] The movable fire assembly comprises a movable air outlet movably connected with the fire head main body, and the movable air outlet has a movable air passage that can communicate with the end air outlet of the main air passage, and the movable air passage comprises a movable air inlet and a movable air outlet.

[0063] The movable fire head of the embodiment of the utility model comprises a fire head main body and a movable fire assembly, and the movable air outlet of the movable fire assembly is movably connected with the fire head main body.

[0064] Embodiment one

[0065] Referring to Figures 1 to 6 , the movable fire head of the embodiment one of the utility model comprises:

[0066] The fire head body 01 has a main gas passage 10, which includes a main air inlet 15, a main air outlet 16, and an end air outlet 17 at the end of the main air outlet 16. The main air outlet 16 is provided with a main arc-shaped fire outlet 2, which has a plurality of main fire holes 21.

[0067] The movable fire assembly 02 includes a movable air outlet 3 movably connected to the fire head body 01. The movable air outlet 3 has a movable gas passage 30 that can communicate with the end air outlet 17 of the main gas passage 10. The movable gas passage 30 includes a movable air inlet 35 and a movable air outlet 36. The movable air outlet 36 is provided with a movable arc-shaped fire outlet 4, which has a plurality of movable fire holes 41.

[0068] The movable air outlet 3 switches between a fire position and a separated position. When the movable air outlet 3 is in the fire position in which the movable air inlet 35 communicates with the end air outlet 17 of the fire head body 01, the fire angle of the fire head is greater than 180°.

[0069] In this embodiment, the movable air inlet 35 of the movable air outlet 3 is always located in the main gas passage 10, and the movable air outlet 3 slides relative to the fire head body 01.

[0070] In this embodiment, an arc-shaped guide structure is formed between the movable air outlet 3 and the fire head body 01. The arc-shaped guide structure includes an arc-shaped strip 12 formed in the main gas passage 10 of the fire head body 01 and an arc-shaped groove 31 formed on the movable air outlet 3. The arc-shaped strip 12 and the arc-shaped groove 31 are both provided with two strips located on the two sides in the thickness direction.

[0071] In this embodiment, an anti-disengagement structure is formed between the movable air outlet 3 and the fire head body 01. The anti-disengagement structure includes a main hook portion 23 of the main arc-shaped fire outlet 2 of the fire head body 01 formed at the end air outlet 17 of the main gas passage 10 and a movable hook portion 43 of the movable arc-shaped fire outlet 4 formed at the movable air inlet 35 of the movable air outlet 3. By providing the anti-disengagement structure, it can be ensured that the movable fire assembly 02 will not disengage from the fire head body 01, and the requirement for the spring sheet 5 is lower. Specifically, when the movable fire assembly 02 is in the fire position, the deformation degree of the spring sheet 5 should not be too large (which will increase the operation difficulty) or completely absent (which will result in the fire angle being unable to be maximized), and the overlapping area between the movable fire assembly 02 and the fire head body 01 should also not be too large. Therefore, when the anti-disengagement structure is not provided, in order to avoid the disengagement of the movable fire assembly 02, it is necessary to increase the overlapping area between the movable fire assembly 02 and the fire head body 01 or reduce the spring force of the spring sheet 5, which will result in the actual fire angle being reduced. Moreover, if the anti-disengagement structure is not provided, the spring force of the spring sheet 5 will decrease after being used for a period of time, which will further reduce the actual fire angle (although it is still larger than that in the prior art).

[0072] In this embodiment, the movable fire outlet further comprises a fire outlet position maintaining assembly 03, which comprises a spring sheet 5, one end of which is fixed to the fire outlet body 01 and the other end of which is fixed to the end of the movable air outlet piece 3 away from the fire outlet body 01. The fire outlet position maintaining assembly 03 is arranged on one side of the fire outlet body 01 in the thickness direction.

[0073] In this embodiment, the fire outlet position maintaining assembly 03 further comprises a nut 61, a screw 62, a special-shaped stud 63 and a nut cap 64. The nut 61 is welded and fixed to the main shell 1 of the fire outlet body 01, the screw 62 is threadedly connected with the nut 61, and one end of the spring sheet 5 is sleeved on the screw 62. The special-shaped stud 63 is fixed to the movable air outlet piece 3 of the movable fire outlet assembly 02, and the nut cap 64 is threadedly connected with the special-shaped stud 63, and the other end of the spring sheet 5 is sleeved on the special-shaped stud 63. The special-shaped stud 63 comprises a block-shaped portion welded to the end of the movable air outlet piece 3 and a threaded portion. The spring sheet 5 is generally in the shape of a U, and the two ends of the spring sheet 5 are bent to form a ring-shaped portion. With this structure, the spring sheet 5 is convenient to disassemble and assemble. The nut cap 64 is made of a heat insulation component or a separate heat insulation component is arranged outside the nut cap 64 to avoid scalding of the user.

[0074] In other embodiments, the movable air outlet piece 3 is maintained at the fire outlet position by friction (the friction is directly generated between the movable air outlet piece 3 and the fire outlet body 01) and / or an elastic member (the elastic member is separately arranged between the movable air outlet piece 3 and the fire outlet body 01). This structure can make the movable air outlet piece 3 stay at any position, so that stepless adjustment or step adjustment (particular specific angles) of the fire outlet angle between the minimum angle and the maximum angle can be realized. The fire outlet holes on the movable arc-shaped fire outlet piece 4 are always in communication with the fire outlet holes on the main arc-shaped fire outlet piece 2, so that the fire outlet can be realized at any or specific angle (realized by the hole diameter being greater than the hole spacing, etc.).

[0075] In other embodiments, a locking member is arranged on the fire outlet body 01 and moves along the thickness direction of the fire outlet body 01, the locking member is connected with the movable air outlet piece 3 and maintains the movable air outlet piece 3 at the fire outlet position. For example, the locking member abuts against the movable air outlet piece 3, and the locking member maintains the movable air outlet piece 3 at the fire outlet position. This structure can make the movable air outlet piece 3 stay at any position, so that stepless adjustment or step adjustment (particular specific angles) of the fire outlet angle between the minimum angle and the maximum angle can be realized.

[0076] In this embodiment, the fire outlet body 01 comprises a main shell 1 for forming the main air passage 10, and when the movable air inlet 35 of the movable air outlet piece 3 is in communication with the end air outlet 17 of the fire outlet body 01, the whole formed by the main shell 1 and the movable air outlet piece 3 is generally symmetrical with respect to the center of the main air inlet 15. This arrangement makes the air outlet amount of the two end portions of the fire outlet body farthest from the main air inlet 15 substantially consistent, and the fire outlet is more uniform.

[0077] In other embodiments, the main gas passage 10 and the movable gas passage 30 can be designed so that the gas output of the main gas outlet hole 21 of the main arc-shaped fire outlet 2 and the gas output of the movable gas outlet hole 41 of the movable arc-shaped fire outlet 4 are substantially consistent.

[0078] In this embodiment, the fire head body 01 includes a main shell 1 for forming the main gas passage 10, the main shell 1 is welded by two main half shells 11, and the main arc-shaped fire outlet 2 is clamped with the two main half shells 11 to realize replacement of the main arc-shaped fire outlet 2.

[0079] In other embodiments, the main shell 1 and the main arc-shaped fire outlet 2 can also be welded.

[0080] In other embodiments, the main shell 1 of the fire head body 01 can also form a main arc-shaped fire wall, and a plurality of main gas outlet holes 21 are formed on the main arc-shaped fire wall.

[0081] In this embodiment, the movable arc-shaped fire outlet 4 is clamped with the movable gas outlet 3 to realize replacement of the movable arc-shaped fire outlet 4. In other embodiments, the movable gas outlet 3 and the movable arc-shaped fire outlet 4 can also be welded.

[0082] In other embodiments, the movable gas outlet 3 can also form a movable arc-shaped fire wall, and a plurality of movable main gas outlet holes 41 are formed on the movable arc-shaped fire wall.

[0083] In this embodiment, the main arc-shaped fire outlet 2 and the movable arc-shaped fire outlet 4 are usually made of metal materials, and the end of the main arc-shaped fire outlet 2 and the end of the movable arc-shaped fire outlet 4 can be deformed to make the main arc-shaped fire outlet 2 and the movable arc-shaped fire outlet 4 more easily clamped into the main shell 1 or the movable gas outlet 3.

[0084] In this embodiment, the end of the movable gas outlet 3 away from the fire head body 01 is closed.

[0085] In this embodiment, the fire head body 01 is provided with a main positioning groove 13, the main arc-shaped fire outlet 2 forms a main positioning part 22 positioned in the main positioning groove 13, the movable gas outlet 3 is provided with a movable positioning groove 32, and the movable arc-shaped fire outlet 4 forms a movable positioning part 42 positioned in the movable positioning groove 32.

[0086] In this embodiment, the fire angle of the fire head is between 200° and 300°, and is preferably about 270°.

[0087] In this embodiment, the fire angle of the main arc-shaped fire outlet 2 is about 180°.

[0088] In this embodiment, the main arc-shaped fire outlet 2 is in a grid shape, and the movable arc-shaped fire outlet 4 is in a grid shape.

[0089] In other embodiments, the fire head body can include a main fire element with multiple edges (the main arc-shaped fire element 2 is replaced by a main fire element with multiple edges), as shown in Figure 14

[0090] The working principle of the movable fire head of the present embodiment is as follows: when the fire head is not subjected to external force, the movable fire assembly 02 is in the fire position under the action of the fire position maintaining assembly 03, when heating or other operations on the copper pipe are needed, the screw nut 64 is operated to overcome the force of the spring sheet 5, so that the movable fire assembly 02 slides along the guide groove 31 along the guide bar 12 of the fire head body 01, and after sliding through a sufficient arc, reaches the separation position (the separation position is different due to the different diameters of the copper pipe to be operated), so that the fire head is movable relative to the copper pipe in the radial direction and surrounds the copper pipe, at this time, the screw nut 64 is loosened, and under the action of the spring sheet 5, the movable fire assembly 02 is automatically reset to the fire position, at this time, the heating or other operations can be performed.

[0091] In the present embodiment, the heating and welding device can also be equipped with a fire head and a welding gun head at the same time, when welding is needed, the fire head is replaced by the welding gun head.

[0092] The beneficial effects of the movable fire head of the present embodiment are as follows: the movable fire head includes a fire head body 01 and a movable fire assembly 02, the movable air element 3 and the movable arc-shaped fire element 4 of the movable fire assembly 02 are movably connected with the fire head body 01, so that the fire head body 01 can be movable relative to the copper pipe in the radial direction and separated from the copper pipe while realizing a larger angle of fire than the prior art; the movable fire assembly 02 is slidable relative to the fire head body 01, and the fire position maintaining assembly 03 including the spring sheet 5 is arranged, so that the movable fire assembly 02 is always located at the fire position without external force; the movable air element 3 of the movable fire assembly 02 and the main housing 1 of the fire head body 01 form a guide structure, which is beneficial to the sliding of the movable fire assembly 02 relative to the fire head body 01; only the screw nut 64 of the fire position maintaining assembly 01 needs to be operated when the copper pipe is entered or exited, which is convenient to operate; the heating angle is large, and the copper pipe can be heated once to meet the requirements without being heated around the copper pipe 2-3 times; the movable fire assembly 02 can be retracted into the fire head body 01, so that the packaging, transportation and storage volume is reduced.

[0093] Embodiment two

[0094] The difference between embodiment two and embodiment one is mainly in the movement mode of the movable fire assembly 02 and the fire head body 01 and the fire position maintaining assembly 03.

[0095] Referring to Figures 7 to 13 , the movable fire head of the present embodiment includes:

[0096] ​The fire head body 01 has a main gas passage 10, which includes a main gas inlet 15, a main gas outlet 16, and an end gas outlet 17 at the end of the arc-shaped gas outlet. The main gas outlet 16 is provided with a main arc-shaped fire outlet 2, which has a plurality of main fire holes 21.

[0097] The movable fire outlet assembly 02 includes a movable gas outlet 3 movably connected to the fire head body 01. The movable gas outlet 3 has a movable gas passage 30 that can communicate with the end gas outlet 17 of the main gas passage 10. The movable gas passage 30 includes a movable gas inlet 35 and a movable gas outlet 36. The movable gas outlet 36 is provided with a movable arc-shaped fire outlet 4, which has a plurality of movable fire holes 41.

[0098] The movable gas outlet 3 switches between a fire outlet position and a separated position. When the movable gas outlet 3 is in the fire outlet position in which the movable gas inlet 35 communicates with the end gas outlet 17 of the fire head body 01, the fire outlet angle of the fire head is greater than 180°.

[0099] In this embodiment, the movable gas outlet 3 is sleeved on the fire head body 01, and the movable gas outlet 3 swings relative to the fire head body 01.

[0100] In this embodiment, the movable gas outlet 3 swings relative to the fire head body 01 through a swinging assembly 04. The swinging assembly 04 includes a T-shaped hollow pipe 91 and a rivet 92. The movable gas outlet 3 and the fire head body 01 are sleeved on the small-diameter section of the T-shaped hollow pipe 91, and the rivet 92 penetrates through one end of the T-shaped hollow pipe 91. There are two sets of swinging assemblies 04. The fire head body 01 is provided with a mounting hole 14 for mounting the T-shaped hollow pipe 91, and the movable gas outlet 3 is provided with a connecting hole 37 for mounting the T-shaped hollow pipe 91.

[0101] In this embodiment, the movable fire head further includes a fire outlet position maintaining assembly 03. The fire outlet position maintaining assembly 03 includes a force transmission assembly and a resilient member 7. The force transmission assembly includes a first force transmission member 81 fixed on the fire head body 01 and a second force transmission member 82 fixed at one end on the movable gas outlet 3. The resilient member 7 is in contact with the first force transmission member 81 and the second force transmission member 82 at two ends, respectively, and generates a force that causes the force transmission member to rotate towards the fire head body 01. The end of the second force transmission member 82 away from the movable fire outlet assembly 02 forms an operating portion. Since the end of the second force transmission member 82 away from the movable fire outlet assembly 02 is far away from the movable fire outlet assembly 02, the temperature at this position is relatively low, which avoids scalding when the user operates the second force transmission member 82. The resilient member 7 is a compression spring. In other embodiments, the resilient member 7 can also be a reed.

[0102] In the embodiment, the first force transmission member 81 comprises an L-shaped portion and a first cylindrical portion, and one end of the elastic member 7 is located in the first cylindrical portion. The second force transmission member 82 is distributed along the thickness direction, and the second force transmission member 82 comprises a linear portion and a second cylindrical portion which are distributed along the V-shaped side wall of the fire head body 01, and the other end of the elastic member 7 is located in the second cylindrical portion.

[0103] In other embodiments, the movable air outlet member 3 is retained in the fire position by friction and / or elastic members.

[0104] In other embodiments, the fire head body 01 is provided with a locking member movable along the thickness direction thereof, the locking member being connected to the movable air outlet member 3 and retaining the movable air outlet member 3 in the fire position.

[0105] In the embodiment, when the movable air outlet member 3 is in the fire position, the end of the movable arc-shaped fire member 4 abuts against the end of the main arc-shaped fire member 2.

[0106] Referring to Figure 13 In the embodiment, the movable air outlet member 3 comprises a base portion 33 and a connecting portion 34 extending from the end of the base portion 33, and a connecting hole 37 is formed in the connecting portion 34 for swing connection with the fire head body 01, so that the movable air outlet member 3 does not interfere with the fire head body 01 when swinging.

[0107] In other embodiments, the main arc-shaped fire member 2 can also have a plurality of tubular fire portions, and the movable arc-shaped fire member 4 can also have a plurality of tubular fire portions. The tubular fire portions can be equal-diameter tubes or reduced-diameter tubes (the fire end has the smallest diameter).

[0108] In other embodiments, the movable air outlet member 3 can also form a movable arc-shaped fire wall, and a plurality of movable main fire holes 41 are formed in the movable arc-shaped fire wall.

[0109] In the embodiment, the fire angle of the fire head is between 200° and 300°, and is preferably about 270°.

[0110] In the embodiment, the fire angle of the main arc-shaped fire member 2 is about 180°.

[0111] In other embodiments, the fire head body can comprise a main fire member having a plurality of sides (the main arc-shaped fire member 2 is replaced by a main fire member having a plurality of sides), as shown in Figure 15 .

[0112] In other embodiments, the movable fire member of the movable fire assembly 02 can have one or more straight sides (the movable fire member is not arc-shaped).

[0113] The working principle of the movable flame head in this embodiment is as follows: When the flame head is not subjected to external force, the movable flame assembly 02 is in the flame position under the action of the flame position holding assembly 03. When it is necessary to heat copper pipes or other materials, the second force transmission assembly 82 is operated to overcome the force of the elastic member 7, causing the movable flame assembly 02 to rotate relative to the welding torch body 01. Figure 13 Rotate the tube clockwise until it reaches the separation position (the separation position varies depending on the diameter of the copper tube). This will allow the flame head to move radially relative to the copper tube and surround the outside of the copper tube. At this time, release the second force transmission component 82. Under the action of the elastic component 7, the movable flame assembly 02 will automatically return to the flame position. At this time, heating and other operations can be performed.

[0114] The beneficial effects of the movable flame head in Embodiment 2 of this utility model are as follows: It includes a flame head body 01 and a movable flame head assembly 02. The movable gas outlet 3 and the movable arc-shaped flame outlet 4 of the movable flame head assembly 02 are movably connected to the flame head body 01, achieving a larger flame outlet angle compared to the prior art. At the same time, the flame head body 01 can move radially relative to the copper tube and separate from the copper tube. The movable flame head assembly 02 swings relative to the flame head body 01, which is smoother than the sliding movable flame head assembly 02. By setting a flame outlet position holding assembly 03 including an elastic element 7, the movable flame head assembly 02 is always in the flame outlet position when there is no external force. It is easy to operate; the flame outlet position holding assembly 01 (second force transmission element 82) only needs to be operated when entering and exiting the copper tube.

[0115] The above description is merely a specific embodiment of this utility model, but the scope of protection of this utility model is not limited thereto. Those skilled in the art should understand that this utility model includes, but is not limited to, the content described in the above specific embodiments. Any modifications that do not depart from the functional and structural principles of this utility model will be included within the scope of the claims.

Claims

1. A movable fire outlet, characterised in that: The movable fire outlet comprises: a fire outlet body (01) comprising a main shell (1) for forming a main gas passage (10), the main gas passage (10) comprising a main gas inlet (15), a main gas outlet (16) and an end gas outlet (17) at the end of the main gas outlet (16); a movable fire outlet assembly (02) comprising a movable gas outlet part (3) movably connected with the fire outlet body (01), the movable gas outlet part (3) having a movable gas passage (30) which can communicate with the end gas outlet (17) of the main gas passage (10), the movable gas passage (30) comprising a movable gas inlet (35) and a movable gas outlet (36); wherein the movable fire outlet assembly (02) is switched between the fire outlet position and the separated position by sliding or swinging.

2. The movable fire head as claimed in claim 1, wherein: The fire outlet body (01) further comprises a main arc-shaped fire outlet part (2) provided at the main gas outlet (16) of the main shell (1), the main arc-shaped fire outlet part (2) having a plurality of main fire outlet holes (21); and / or, The movable fire outlet assembly (02) further comprises a movable arc-shaped fire outlet part (4) provided at the movable gas outlet (36), the movable arc-shaped fire outlet part (4) having a plurality of movable fire outlet holes (41).

3. The movable fire head according to claim 1 or 2, characterized in that: The movable gas inlet (35) of the movable gas outlet part (3) is always located in the main gas passage (10), and the movable gas outlet part (3) slides relative to the fire outlet body (01).

4. The movable fire head as claimed in claim 3, wherein: An arc-shaped guide structure is formed between the movable gas outlet part (3) and the fire outlet body (01), the arc-shaped guide structure comprising an arc-shaped strip (12) formed in the main gas passage (10) of the fire outlet body (01) and an arc-shaped groove (31) formed on the movable gas outlet part (3); and / or, A separation-preventing structure is formed between the movable gas outlet part (3) and the fire outlet body (01), the separation-preventing structure comprising a main hook portion (23) formed by the main arc-shaped fire outlet part (2) at the end gas outlet (17) of the main gas passage (10) of the fire outlet body (01) and a movable hook portion (43) formed by the movable arc-shaped fire outlet part (4) at the movable gas inlet (35) of the movable gas outlet part (3).

5. The movable fire head as claimed in claim 3, wherein: The movable fire outlet further comprises a fire outlet position maintaining assembly (03), the fire outlet position maintaining assembly (03) comprising a spring sheet (5), one end of the spring sheet (5) being fixed on the fire outlet body (01) and the other end being fixed on the end of the movable gas outlet part (3) away from the fire outlet body (01); and / or, The movable gas outlet part (3) is maintained in the fire outlet position by friction and / or an elastic part.

6. The movable fire head as claimed in claim 1 or 2, wherein: The movable gas outlet part (3) is sleeved on the fire outlet body (01), and the movable gas outlet part (3) swings relative to the fire outlet body (01).

7. The movable fire head as claimed in claim 6, wherein: The movable gas outlet part (3) swings relative to the fire outlet body (01) through a swinging assembly (04), the swinging assembly (04) comprising a T-shaped hollow tube (91) and a rivet (92), the movable gas outlet part (3) and the fire outlet body (01) being sleeved on a small-diameter section of the T-shaped hollow tube (91), and one end of the rivet (92) penetrating through the T-shaped hollow tube (91).

8. The movable fire head as claimed in claim 6, wherein: The movable fire outlet further comprises a fire outlet position maintaining assembly (03), the fire outlet position maintaining assembly (03) comprises a force transmission assembly and an elastic member (7), the force transmission assembly comprises a first force transmission member (81) and a second force transmission member (82), the first force transmission member (81) is fixed on the fire outlet body (01), one end of the second force transmission member (82) is fixedly connected to the movable air outlet member (3), the elastic member (7) abuts against the first force transmission member (81) and the second force transmission member (82) at two ends respectively, the elastic member (7) generates an acting force for rotating the second force transmission member (82) towards the fire outlet body (01), and the elastic member (7) is a compression spring or a spring leaf; and / or, The movable air outlet member (3) is maintained at the fire outlet position by friction and / or an elastic member; and / or, The fire outlet body (01) is provided with a locking member movable along the thickness direction of the fire outlet body (01), the locking member is connected with the movable air outlet member (3) and maintains the movable air outlet member (3) at the fire outlet position.

9. The movable fire head as claimed in claim 6, wherein: When the movable air outlet member (3) is located at the fire outlet position, the end of the movable arc-shaped fire outlet member abuts against the end of the main arc-shaped fire outlet member (2); and / or, The movable air outlet member (3) comprises a base (33) and a connecting portion (34) extending from the end of the base (33), the connecting portion (34) is provided with a connecting hole (37) for swing connection with the fire outlet body (01), so that the movable air outlet member (3) does not interfere with the fire outlet body (01) when swinging.

10. The movable fire head as claimed in claim 1, wherein: The fire outlet body (01) further comprises a main arc-shaped fire outlet member (2), the main housing (1) is welded by two main half housings (11), the main arc-shaped fire outlet member (2) is welded or clamped with the two main half housings (11), the main arc-shaped fire outlet member (2) is in a grid shape or has a plurality of tubular fire outlet portions; and / or, The movable fire outlet assembly (02) further comprises a movable arc-shaped fire outlet member (4), the movable air outlet member (3) is welded or clamped with the movable arc-shaped fire outlet member (4), the movable arc-shaped fire outlet member (4) is in a grid shape or has a plurality of tubular fire outlet portions, and the end of the movable air outlet member (3) away from the fire outlet body (01) is closed; and / or, The fire outlet body (01) is provided with a main positioning groove (13), the main arc-shaped fire outlet member (2) forms a main positioning portion (22) positioned in the main positioning groove (13), the movable air outlet member (3) is provided with a movable positioning groove (32), and the movable arc-shaped fire outlet member forms a movable positioning portion (42) positioned in the movable positioning groove (32).

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