Burner gun and connecting method of burner gun

Abstract

To prevent the leakage of fuel and a spray medium.SOLUTION: A burner gun comprises: a connection metal fixture 30 having a fuel connection port 31 and a spray medium connection port 32; a piping connection member 20 having a fuel supply flow passage 21 and a spray medium supply flow passage 22; a connection part 40 for switching a connection state for making the connection metal fixture 30 and the piping connection member 20 contact with each other, and a release state for making the connection metal fixture 30 and the piping connection member 20 not contact with each other; and a gasket 50 arranged between the piping connection member 20 and the connection metal fixture 30. The connection part 40 generates a pressing force in a direction in which the piping connection member 20 is made to contact with the connection metal fixture 30, and forms a seal region by pressing the gasket 50 by the pressing force, and the connection metal fixture 30 has a support part 36 for supporting the piping connection member 20 in the connection state.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present disclosure relates to a burner gun and a method for connecting the burner gun. [Background technology]

[0002] Conventionally, a burner gun equipped with a nozzle that atomizes liquid fuel supplied from outside the boiler with an atomizing medium such as air or steam and injects the atomized fuel into the boiler furnace has been known (see, for example, Patent Document 1). The burner gun of Patent Document 1 is equipped with an oil carrier pipe that carries fuel oil, a gas carrier pipe that carries air or steam, and a nozzle provided at the tip of the burner gun that injects the fuel oil carried through the oil carrier pipe and the air or steam carried through the gas carrier pipe into the furnace.

[0003] In addition, a connecting metal fitting and a piping connection member are provided at the base end of the burner gun for connecting an external oil pipe that supplies fuel oil to the oil carrier pipe from outside the boiler and an external gas pipe that supplies air or steam to the gas carrier pipe. The piping connection member is a metal block, and the ends of the oil carrier pipe and the gas carrier pipe are connected to the connecting metal fittings, respectively. An oil flow path and a gas flow path are formed in the piping connection member. As a result, the fuel oil and the air or steam are sent from the external oil pipe and the external gas pipe to the oil carrier pipe and the gas carrier pipe through the oil flow path and the gas flow path in the piping connection member.

[0004] The burner gun shown in Patent Document 1 needs to be periodically removed from the boiler in order to clean the nozzle. When removing the burner gun from the boiler, the piping connection member is disconnected from the connection fitting. For this reason, the piping connection member and the connection fitting are made detachable by a clamp member. The clamp member presses the piping connection member against the connection fitting by tightening a fastening screw, thereby connecting the piping connection member to the connection fitting. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2018-96590 A Summary of the Invention [Problem to be solved by the invention]

[0006] In the burner gun disclosed in Patent Document 1, if the clamp member cannot properly maintain the pressing force of the pipe connection member against the connection fitting, liquid fuel or spray medium may leak from the position where the pipe connection member and the connection fitting are connected. For example, if a rotational force is generated around the center of gravity in the pipe connection member, the rotational force may reduce the pressing force of the pipe connection member against the connection fitting, and liquid fuel or spray medium may leak.

[0007] The present disclosure has been made in consideration of the above circumstances, and aims to provide a burner gun that can properly maintain a connected state between a connection part to which a fuel piping and a spray medium piping are connected, and a supply part that supplies fuel and spray medium from the connection part to a nozzle part, thereby preventing leakage of liquid fuel and spray medium. [Means for solving the problem]

[0008] In order to solve the above problems, the burner gun of the present disclosure employs the following means. A burner gun according to one aspect of the present disclosure injects fuel and atomizing medium and is detachable from a boiler, and includes a fuel transport pipe for transporting the fuel, an atomizing medium transport pipe for transporting the atomizing medium, a connection unit having a fuel connection port to which a fuel piping for supplying the fuel is connected and an atomizing medium connection port to which a spraying medium piping for supplying the atomizing medium is connected, and a supply unit having a fuel supply flow path for supplying the fuel from the fuel connection port to a base end of the fuel transport pipe and an atomizing medium supply flow path for supplying the atomizing medium from the spraying medium connection port to the base end of the spraying medium transport pipe. the supply portion is connected to the fuel supply passage through the fuel connection port and the spray medium is supplied from the spray medium connection port to the spray medium supply passage, and the connection portion is connected to the supply portion through the fuel connection port, and the spray medium is supplied from the spray medium connection port to the spray medium supply passage, and the supply portion is connected to the fuel connection port through the spray medium connection port. The supply portion is provided with a gasket disposed between the supply portion and the connection portion, and the connection portion generates a pressing force in a direction that brings the supply portion into contact with the connection portion, and the pressing force presses the gasket to form a sealing area. The connection portion has a support portion that supports the supply portion in the connected state.

[0009] In a method of connecting a burner gun according to one aspect of the present disclosure, the burner gun includes a fuel transport pipe for transporting the fuel, an atomizing medium transport pipe for transporting the atomizing medium, a connection part having a fuel connection port to which a fuel pipe for supplying the fuel is connected and an atomizing medium connection port to which an atomizing medium pipe for supplying the atomizing medium is connected, a supply part having a fuel supply flow path for supplying the fuel from the fuel connection port to a base end of the fuel transport pipe and an atomizing medium supply flow path for supplying the atomizing medium from the atomizing medium connection port to the base end of the atomizing medium transport pipe, and The device has a connecting part that switches between a connected state in which the supply part is brought into contact with the connection part so that the fuel is supplied from the fuel connection port to the fuel supply passage and the spray medium is supplied from the spray medium connection port to the spray medium supply passage, and a released state in which the connection part and the supply part are not in contact, and a gasket that is arranged between the supply part and the connection part, and includes a connecting step in which the connecting part generates a pressing force in a direction to bring the supply part into contact with the connection part, and the pressing force presses the gasket to form a sealed area, and the connection part has a support part that supports the supply part in the connected state. Effect of the Invention

[0010] According to the present disclosure, a burner gun can be provided that can prevent leakage of liquid fuel and spray medium by properly maintaining a connection between a connection part to which a fuel piping and a spray medium piping are connected and a supply part that supplies fuel and spray medium from the connection part to a nozzle part. [Brief description of the drawings]

[0011] [Figure 1] 1 is a vertical cross-sectional view showing a state in which a burner gun according to a first embodiment of the present disclosure is attached to a boiler. FIG. [Diagram 2] FIG. 2 is a plan view showing the configuration of the tip end side of the burner gun shown in FIG. [Diagram 3] 2 is a cross-sectional view taken along the line AA of the pipe connection member shown in FIG. [Figure 4]2 is a vertical cross-sectional view showing the configuration of a connection portion between a pipe connection member of the burner gun shown in FIG. 1 and a fuel pipe and a spray medium pipe. FIG. [Diagram 5] 5 is a cross-sectional view of the burner gun shown in FIG. 4 taken along the line BB, illustrating a released state in which the pipe connection member is not connected to the connection fitting. [Figure 6] 5 is a cross-sectional view of the burner gun shown in FIG. 4 taken along the line BB, showing a connected state in which the pipe connection member is connected to a connecting fitting. [Figure 7] FIG. 11 is a vertical cross-sectional view showing the configuration of a connection portion between a pipe connection member of a burner gun according to a second embodiment of the present disclosure and a fuel pipe and a spray medium pipe. [Figure 8] FIG. 11 is a vertical cross-sectional view showing a configuration of a connection portion between a pipe connection member of a burner gun according to a modified example of the second embodiment of the present disclosure and a fuel pipe and a spray medium pipe. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] [First embodiment] Hereinafter, the burner gun 5 according to the first embodiment of the present disclosure will be described with reference to the drawings. Fig. 1 is a vertical cross-sectional view showing a state in which the burner gun 5 according to the first embodiment of the present disclosure is attached to a boiler 1. Fig. 2 is a plan view showing the configuration of the tip end side of the burner gun 5 shown in Fig. 1. Fig. 3 is a cross-sectional view taken along the line AA of the piping connection member 20 shown in Fig. 1. Fig. 4 is a vertical cross-sectional view showing the configuration of the connection portion between the piping connection member 20 of the burner gun 5 shown in Fig. 1 and the fuel piping 101 and the spray medium piping 102.

[0013] As shown in Fig. 1, the boiler 1 includes a furnace 2 that extends continuously in a cylindrical shape in the vertical direction, a wind box front panel 3 that is provided horizontally at intervals from a side wall 2s of the furnace 2 and covers the furnace 2 from the outside, and a plurality of burner guns 5 disposed outside the furnace 2. In such a boiler 1, fuel F such as light oil or heavy oil and spray medium G made of air or steam are injected from the burner gun 5 into the furnace 2, and the injected fuel F is burned in the furnace 2. Examples of the fuel F include petroleum such as heavy oil or light oil, various process waste liquids, liquefied ammonia, etc., and is supplied to the burner gun 5 in a liquid state.

[0014] The burner gun 5 includes a fuel transport pipe 11 for transporting the fuel F, a spray medium transport pipe 12 for transporting the spray medium G, a nozzle 13, and a piping connection member 20. The burner gun 5 injects the fuel F and the spray medium G into the furnace 2 and is detachable from the boiler 1.

[0015] The fuel conveying pipe 11 and the spray medium conveying pipe 12 are each formed of, for example, a metal pipe material. The fuel conveying pipe 11 and the spray medium conveying pipe 12 have base ends 11a, 12a connected to a piping connection member 20 and tip ends 11b, 12b connected to a nozzle 13 via flexible hoses 14, 15.

[0016] The fuel conveying pipe 11 and the spray medium conveying pipe 12 have straight pipe sections 11s, 12s extending linearly at a certain length on the tip end 11b, 12b side, respectively, and have curved sections 11t, 12t curved in a U-shape formed on the base end 11a, 12a side of the straight pipe sections 11s, 12s. The curved sections 11t, 12t are covered with a cover 25.

[0017] The nozzle 13 injects the fuel F transported through the fuel transport pipe 11 and the spray medium G transported through the spray medium transport pipe 12 into the furnace 2. The nozzle 13 is connected to the ends 11b, 12b of the fuel transport pipe 11 and the spray medium transport pipe 12 via flexible hoses 14, 15 having high elasticity. The flexible hoses 14, 15 can be bent in the vertical direction of the furnace 2, which allows the spray direction of the fuel F and the spray medium G from the nozzle 13 to be adjusted in the vertical direction. The nozzle 13 is a so-called two-fluid injection valve that atomizes the fuel F with the spray medium G and injects it.

[0018] 1 and 3, the piping connection member (supply section) 20 has a fuel supply flow passage 21 that supplies fuel F from the connecting fitting 30 to the base end 11a of the fuel transport pipe 11, a spray medium supply flow passage 22 that supplies spray medium G from the connecting fitting 30 to the base end 12a of the spray medium transport pipe 12, pipe insertion holes 23 and 24 through which the straight pipe sections 11s and 12s of the fuel transport pipe 11 and the spray medium transport pipe 12 are inserted, and a cover 25. The piping connection member 20 is a plate-shaped member formed from a metal material having high hardness and high thermal conductivity, such as carbon steel for mechanical construction (S25C material).

[0019] The fuel supply passage 21, the spray medium supply passage 22, and the pipe insertion holes 23, 24 are formed to penetrate in the plate thickness direction from one surface 20f side to the other surface 20g side of the piping connection member 20. In this embodiment, the fuel supply passage 21 and the spray medium supply passage 22 are formed side by side in the vertical direction, and the pipe insertion holes 23, 24 are formed side by side in the horizontal direction.

[0020] The connecting fitting (connecting part) 30 is a metal member having a fuel connection port 31 to which an end 101a of a fuel pipe 101 that supplies fuel F from the outside is connected, and a spray medium connection port 32 to which an end 102a of a spray medium pipe 102 that supplies spray medium G from the outside is connected. When the connecting fitting 30 is connected to the pipe connection member 20, the fuel F is supplied from the fuel connection port 31 to the fuel supply flow passage 21, and the spray medium G is supplied from the spray medium connection port 32 to the spray medium supply flow passage 22.

[0021] A gasket 50 is disposed between the connecting fitting 30 and the piping connection member 20 to suppress leakage of fuel F from the connection portion between the fuel supply passage 21 and the fuel connection port 31 of the connecting fitting 30, and leakage of spray medium G from the connection portion between the spray medium supply passage 22 and the spray medium connection port 32. The gasket 50 is formed from a rubber-based material that is softer than the connecting fitting 30 and the piping connection member 20, a metal-based material such as copper, or the like.

[0022] The gasket 50 deforms due to the pressing force applied by the pressing portion 42 of the connecting portion 40 described later to press the piping connection member 20 toward the connecting fitting 30, forming a fuel sealing area that seals the connection portion between the fuel connection port 31 and the fuel supply passage 21, and a spray medium sealing area that seals the connection portion between the spray medium connection port 32 and the spray medium supply passage 22.

[0023] As shown in FIG. 4, the gasket 50 has a communication hole 50h arranged at the connection portion between the fuel supply passage 21 and the fuel connection port 31, and a communication hole 50g arranged at the connection portion between the spray medium supply passage 22 and the spray medium connection port 32, and is arranged and formed to surround the periphery of each connection portion.

[0024] Next, the connecting portion 40 that switches between a connected state in which the pipe connection member 20 and the fitting 30 are connected and a released state in which the pipe connection member 20 and the fitting 30 are not connected will be described with reference to the drawings. Fig. 5 is a cross-sectional view of the burner gun 5 shown in Fig. 4 taken along the arrow BB, showing a released state in which the pipe connection member 20 is not connected to the fitting 30. Fig. 6 is a cross-sectional view of the burner gun 5 shown in Fig. 4 taken along the arrow BB, showing a connected state in which the pipe connection member 20 is connected to the fitting 30. Fig. 7 is a diagram showing a comparative example of the burner gun 5.

[0025] The connecting portion 40 is a device for switching between a connected state in which the connecting fitting 30 and the piping connection member 20 are in contact with each other so that fuel F is supplied from the fuel connection port 31 to the fuel supply passage 21 and spray medium G is supplied from the spray medium connection port 32 to the spray medium supply passage 22, and a released state in which the connecting fitting 30 and the piping connection member 20 are not in contact with each other.

[0026] 4, in a released state where the connection fitting 30 and the pipe connection member 20 are not in contact with each other, the coupling part 40 is positioned at the position indicated by the solid line. On the other hand, in a connected state, the coupling part 40 swings around the swing axis Y in the direction indicated by the arrow, and when pressed after being positioned at the position indicated by the dotted line, the coupling part 40 connects the connection fitting 30 and the pipe connection member 20. The connection by pressing will be described later.

[0027] 5, the coupling portion 40 has a pair of arms 41 and a pressing portion 42. The arm portion 41 is a rod-like member having one end 41a attached to the connection fitting 30 so as to be swingable around the swing axis Y. The pressing portion 42 is attached to the other end 41b of the arm portion 41 and is a device that generates a pressing force to press the pipe connection member 20 toward the connection fitting 30.

[0028] 5, the connecting fitting 30 has a pair of insertion grooves 33 into which one ends 41a of the arm portions 41 are inserted, a pair of through holes 34 formed along the oscillation axis Y so as to pass through the insertion grooves 33, and a pair of pin members 35 inserted into the through holes 34. The pair of insertion grooves 33 are arranged at an interval along the oscillation axis Y.

[0029] The through hole 34 is a hole that extends along a second direction DR2 perpendicular to the first direction DR1 in which the arm portion 41 inserted into the insertion groove 33 extends. The pin member 35 is inserted into both the insertion hole 41a1 formed on one end 41a of the arm portion 41 and the through hole 34, and is disposed along the oscillation axis Y. This results in the coupling portion 40 being attached to the connecting fitting 30 so as to be able to swing around the oscillation axis Y.

[0030] 5, the pressing portion 42 generates a pressing force in a second direction DR2 along the oscillation axis Y, pressing the pipe connection member 20 toward the connection fitting 30 at an intermediate position between a first position P1, where one of the pair of insertion grooves is disposed, and a second position P2, where the other of the pair of insertion grooves 33 is disposed. The pressing force generated by the pressing portion 42 deforms the gasket 50 to form a fuel seal area that seals the fuel connection port 31 and a spray medium seal area that seals the spray medium connection port 32 (connecting step).

[0031] The pressing portion 42 of the connecting portion 40 has a fastening bolt 42a, a female threaded portion 42b, and a pressing member 42c. Both ends of the female threaded portion 42b in the second direction DR2 are joined to the other end 41b of the arm portion 41 by welding or the like. The female threaded portion 42b has a female thread 42b1 formed thereon, which engages with a male thread 42a1 formed on the fastening bolt 42a.

[0032] The pressing member 42c is a member that transmits a pressing force along the first direction DR1 transmitted from the tip portion 42a2 of the fastening bolt 42a to the pipe connection member 20. A recess 42c1 against which the tip portion 42a2 abuts is formed at a position of the pressing member 42c facing the tip portion 42a2 of the fastening bolt 42a.

[0033] 5 shows a released state in which the pipe connection member 20 is not connected to the connection fitting 30. In the released state, the tip portion 42a2 of the fastening bolt 42a is not abutted against the recess 42c1. The worker rotates the fastening bolt 42a in the fastening direction (the direction in which the female thread portion 42b protrudes from the fastening bolt 42a) to switch the released state shown in FIG. 5 to the connected state shown in FIG.

[0034] When an operator rotates the fastening bolt 42a in the fastening direction so that the tip 42a2 of the fastening bolt 42a abuts against the recess 42c1, a pressing force acts on the pressing member 42c as the tip 42a2 of the fastening bolt 42a presses the recess 42c1 toward the pipe connection member 20. The pressing force acting on the pressing member 42c acts to bring the pipe connection member 20 closer to the connection fitting 30, and deforms the gasket 50 arranged between the pipe connection member 20 and the connection fitting 30 so as to compress it.

[0035] The reaction force of the pressing force applied by the fastening bolt 42a to the pressing member 42c acts evenly on each of the pair of pin members 35 via the pair of arms 41. The reaction force acting on the pin members 35 is transmitted to the connecting fitting 30 via the base end 35a and tip end 35b along the oscillation axis Y of the pin member 35. Because the reaction force acting on the pin member 35 is transmitted to the connecting fitting 30 via both the base end 35a and tip end 35b, deformation of the connecting fitting 30 is suppressed compared to when the reaction force is transmitted to only one of the base end 35a and tip end 35b.

[0036] Next, we will explain the structure that suppresses a decrease in the pressing force pressing the pipe connection member 20 against the connecting fitting 30 due to the rotational force around the center of gravity Gc generated in the pipe connection member 20 when the connecting fitting 30 and the pipe connection member 20 are in contact with each other and connected.

[0037] As shown in Fig. 4, the center of gravity Gc of the pipe connection member 20 is disposed at a position farther away from the connector 30 than the gasket 50 is in the horizontal direction HD. A rotational force is generated in the pipe connection member 20 in the clockwise direction in Fig. 4 around the center of gravity Gc. The gasket 50 is disposed below the center of gravity Gc of the pipe connection member 20 in the vertical direction VD. Therefore, unless a reaction force equal to the rotational force generated in the pipe connection member 20 is applied, the pressing force applied by the pipe connection member 20 to the connector 30 via the gasket 50 will be lower on the upper side than on the lower side in the vertical direction VD.

[0038] 4, the connection fitting 30 of this embodiment has a support portion 36 that supports the lower end 20a in the vertical direction VD of the pipe connection member 20 in the connected state. Specifically, the support portion 36 supports the lower end 20a in the vertical direction VD of the pipe connection member 20. The tip 36a of the support portion 36 is disposed in a position in the horizontal direction HD that is farther away from the gasket 50 than the center of gravity Gc of the pipe connection member 20. The lower end 20a in the vertical direction VD of the pipe connection member 20 is supported by the support portion 36, and a reaction force equal to the rotational force generated in the pipe connection member 20 is transmitted from the support portion 36 to the pipe connection member 20.

[0039] According to the burner gun 5 of the present embodiment described above, the following actions and effects are achieved. According to the burner gun 5 of this embodiment, the fuel F introduced from the fuel piping 101 to the fuel connection port 31 of the connecting fitting 30 is supplied from the fuel connection port 31 to the base end 11a of the fuel conveying pipe 11 via the fuel supply passage 21 of the piping connection member 20.

[0040] In addition, the spray medium G introduced from the spray medium piping 102 to the spray medium connection port 32 of the connection fitting 30 is supplied from the spray medium connection port 32 to the base end 12a of the spray medium conveying pipe 12 via the spray medium supply passage 22 of the piping connection member 20. The fuel F conveyed from the base end 11a to the tip end 11b of the fuel conveying pipe 11 and the spray medium G conveyed from the base end 12a to the tip end 12b of the spray medium conveying pipe 12 are sprayed from the nozzle 13.

[0041] According to the burner gun 5 of this embodiment, the connecting part 40 switches between a connected state in which the fitting 30 and the piping connection member 20 are brought into contact with each other so that fuel F is supplied from the fuel connection port 31 to the fuel supply passage 21 and spray medium G is supplied from the spray medium connection port 32 to the spray medium supply passage 22, and a released state in which the fitting 30 and the piping connection member 20 are not in contact with each other. Since a gasket 50 is disposed between the piping connection member 20 and the fitting 30, in the connected state, the gasket 50 is pressed and deformed by the pressing force pressing the piping connection member 20 toward the fitting 30, thereby forming a fuel sealing region and a spray medium sealing region.

[0042] According to the burner gun 5 of this embodiment, in the connected state, the lower end of the pipe connection member 20 in the vertical direction VD is supported by the support portion 36 of the connection fitting 30. Therefore, a reaction force equal to the rotational force generated in the pipe connection member 20 is transmitted from the support portion 36 to the pipe connection member 20, and the pressing force applied by the pipe connection member 20 to the connection fitting 30 via the gasket 50 becomes equal on the lower side and the upper side in the vertical direction VD. Therefore, the state in which the connection fitting 30 and the pipe connection member 20 are connected can be appropriately maintained to prevent leakage of the fuel F and the spray medium G.

[0043] According to the burner gun 5 of this embodiment, the tip 36a of the support portion 36 is positioned in a position in the horizontal direction HD that is farther away from the gasket 50 than the center of gravity Gc of the pipe connection member 20, so that the lower end 20a of the pipe connection member 20 in the vertical direction VD can be securely supported and a reaction force equal to the rotational force generated in the pipe connection member 20 can be transmitted from the support portion 36 to the pipe connection member 20.

[0044] According to the burner gun 5 of this embodiment, when the pipe connection member 20 is pressed toward the connection fitting 30 by the pressing force generated by the pressing portion 42, a reaction force of the pressing force acts on the pin member 35 via the arm portion 41. The pin member 35 inserted into the insertion hole 41a1 of the arm portion 41 has both the base end portion 35a and the tip end portion 35b supported by the region of the connection fitting 30 adjacent to the insertion groove 33.

[0045] Therefore, compared with the case where only the tip portion 35b of the pin member 35 is held by the connecting fitting 30, that is, the case where the reaction force acting on the pin member 35 is transmitted to the connecting fitting 30 only from the base end portion 35a and not transmitted to the connecting fitting 30 via the tip portion 35b, the reaction force of the pressing force acting on the pin member 35 via the arm portion 41 acts evenly on both the base end portion 35a and the tip portion 35b of the pin member 35, preventing deformation of the through hole 34 of the connecting fitting 30 into which the pin member 35 is inserted and its surroundings. Therefore, the connecting fitting 30 to which the fuel pipe 101 and the spray medium pipe 102 are connected and the pipe connection member 20 that supplies the fuel F and the spray medium G from the connecting fitting 30 to the nozzle 13 can be appropriately maintained in a connected state, thereby preventing leakage of the fuel F and the spray medium G.

[0046] Second Embodiment Next, the burner gun 5 according to the second embodiment of the present disclosure will be described with reference to Fig. 7. This embodiment is a modified example of the first embodiment, and is the same as the first embodiment except as otherwise specifically described below, and the description thereof will be omitted below. Fig. 7 is a vertical cross-sectional view showing the configuration of the connection portion between the piping connection member 20 of the burner gun 5 according to the second embodiment of the present disclosure and the fuel piping 101 and the spray medium piping 102.

[0047] 7, the connecting portion 40A of the burner gun 5 of this embodiment has a first arm portion 41A having one end attached to the connecting fitting 30, and a first pressing portion 42A attached to the other end side of the first arm portion 41A and generating a pressing force that presses the pipe connection member 20 toward the connecting fitting 30. The first arm portion 41A is attached to the connecting fitting 30 so as to be swingable around a swing axis YA.

[0048] The connecting portion 40A of the burner gun 5 of this embodiment has a second arm portion 41B having one end attached to the connecting fitting 30, and a second pressing portion 42B attached to the other end side of the second arm portion 41B and generating a pressing force that presses the pipe connection member 20 toward the connecting fitting 30. The second arm portion 41B is attached to the connecting fitting 30 so as to be swingable around the swing axis YB.

[0049] 7, the coupling part 40A is located at the position indicated by the solid line in a released state where there is no contact between the connection fitting 30 and the pipe connection member 20. On the other hand, in a connected state, the first arm 41A and the second arm 41B swing around the swing axis YA and around the swing axis YB in the directions indicated by the arrows, and are located at the position indicated by the dotted line.

[0050] The first pressing portion 42A presses the pipe connection member 20 toward the connection fitting 30 via the pressing member 42Ac at a first pressing position PA1 on the first axis X1 along which the fuel supply passage 21 extends. The second pressing portion 42B presses the pipe connection member 20 toward the connection fitting 30 via the pressing member 42Ac at a second pressing position PA2 on the second axis X2 along which the spray medium supply passage 22 extends.

[0051] 7 has a first arm 41A attached to the connecting fitting 30 so as to be swingable about the swing axis YA, and a second arm 41B attached to the connecting fitting 30 so as to be swingable about the swing axis YB, but other modifications may be used. For example, as shown in FIG 8, a connecting part 40C may be provided in which a first pressing part 42A and a second pressing part 42B are attached to a single arm 41C attached to the connecting fitting 30 so as to be swingable about the swing axis Y.

[0052] According to the burner gun 5 of the present embodiment, one end of the first arm 41A is attached to the connection fitting 30, and the other end of the first arm 41A is attached to the first pressing portion 42A, and the first pressing portion 42A generates a pressing force that presses the pipe connection member 20 toward the connection fitting 30. The first pressing portion 42A presses the pipe connection member 20 toward the connection fitting 30 at a first pressing position PA1 on the first axis X1 along which the fuel supply flow passage 21 extends.

[0053] In addition, one end of the second arm portion 41B is attached to the connection fitting 30, and the other end of the second arm portion 41B is attached to the second pressing portion 42B, and the second pressing portion 42B generates a pressing force that presses the pipe connection member 20 toward the connection fitting 30. The second pressing portion 42B presses the pipe connection member 20 toward the connection fitting 30 at a second pressing position PA2 on the second axis X2 along which the spray medium supply passage 22 extends.

[0054] 7 and 8, the first pressing portion 42A presses at the first pressing position PA1 on the first axis X1, and the second pressing portion 42B presses at the second pressing position PA2 on the second axis X2, thereby making it possible to hold the contact surfaces of the connection fitting 30 and the pipe connection member 20 parallel to each other. This suppresses the generation of a rotational force (rotational moment) around the center of gravity of the pipe connection member 20, making it possible to prevent the fuel F and the spray medium G from leaking out.

[0055] Furthermore, more preferably, when the pressing force applied by the first pressing portion 42A at the first pressing position PA1 on the first axis X1 and the pressing force applied by the second pressing portion 42B at the second pressing position PA2 on the second axis X2 are each applied with an equal pressing force to bring the piping connection member 20 into contact with the connecting fitting 30, the axial force can be transmitted equally, and an equal pressing force can be applied to the gasket 50 around the fuel connection port 31 and the spray medium connection port 32, thereby more reliably preventing leakage of the fuel F and the spray medium G.

[0056] The burner gun 5 and the method of connecting the burner gun described in each of the above-described embodiments can be understood, for example, as follows. The burner gun according to the first aspect of the present disclosure injects fuel and atomizing medium and is detachable from a boiler (1). The burner gun includes a fuel conveying pipe (11) for conveying the fuel, an atomizing medium conveying pipe (12) for conveying the atomizing medium, a connection part (30) having a fuel connection port (31) to which a fuel piping (101) for supplying the fuel is connected and an atomizing medium connection port (32) to which an atomizing medium piping (102) for supplying the atomizing medium is connected, a fuel supply flow passage (21) for supplying the fuel from the fuel connection port to a base end of the fuel conveying pipe, and an atomizing medium supply flow passage (22) for supplying the atomizing medium from the atomizing medium connection port to the base end of the atomizing medium conveying pipe. the supply part (20) having a passage (22); a connecting part (40) that switches between a connected state in which the connection part and the supply part are in contact with each other so that the fuel is supplied from the fuel connection port to the fuel supply flow passage and the spray medium is supplied from the spray medium connection port to the spray medium supply flow passage, and a released state in which the connection part and the supply part are not in contact; and a gasket (50) that is disposed between the supply part and the connection part, wherein the connecting part generates a pressing force in a direction that brings the supply part into contact with the connection part, and the pressing force presses the gasket to form a sealed area, and the connection part has a support part (36) that supports the supply part in the connected state.

[0057] According to the burner gun of the first aspect of the present disclosure, the fuel introduced from the fuel pipe to the fuel connection port of the connection part is supplied from the fuel connection port to the base end of the fuel conveying pipe through the fuel supply passage of the supply part, and the spray medium introduced from the spray medium pipe to the spray medium connection port of the connection part is supplied from the spray medium connection port to the base end of the spray medium conveying pipe through the spray medium supply passage of the supply part.

[0058] According to the burner gun of the first aspect of the present disclosure, the connecting part switches between a connected state in which the connection part and the supply part are in contact with each other to supply fuel from the fuel connection port to the fuel supply passage and the spray medium is supplied from the spray medium connection port to the spray medium supply passage, and a released state in which the connection part and the supply part are not in contact. Since a gasket is disposed between the supply part and the connection part, in the connected state, a sealing area is formed by pressing the gasket with a pressing force in a direction to bring the supply part into contact with the connection part.

[0059] According to the burner gun of the first embodiment of the present disclosure, in the connected state, the supply part is supported by the support part of the connection part. Therefore, a reaction force equal to the rotational force generated in the supply part is transmitted from the support part to the supply part, and the pressing force applied by the supply part to the connection part via the gasket becomes equal on the lower side and the upper side in the vertical direction. Therefore, the connection part and the supply part can be appropriately maintained in a connected state to prevent leakage of fuel and spray medium.

[0060] The burner gun according to the second aspect of the present disclosure is the first aspect, further comprising the following configuration: That is, the tip of the support part is disposed at a position farther away from the gasket than the center of gravity (Gc) of the supply part. According to the burner gun of the second aspect of the present disclosure, the tip of the support part is positioned at a position farther away from the gasket than the center of gravity of the supply part, thereby reliably supporting the vertical lower end of the supply part and transmitting a reaction force equal to the rotational force generated in the supply part from the support part to the supply part.

[0061] The burner gun according to the third aspect of the present disclosure is the first or second aspect, and further includes the following configuration: That is, the coupling part has an arm part (41) one end of which is attached to the connection part so as to be swingable around a swing axis (Y), and a pressing part (42) attached to the other end side of the arm part and generating a pressing force in a direction to bring the supply part into contact with the connection part, and the connection part has an insertion groove (33) into which the one end of the arm part is inserted, a through hole (34) formed to pass through the insertion groove, and a pin member (35) inserted into both the insertion hole (41a1) formed in the arm part and the through hole.

[0062] According to the burner gun according to the third aspect of the present disclosure, when the supply part is brought into contact with the connection part by the pressing force generated by the pressing part, a reaction force of the pressing force acts on the pin member via the arm part. The base end and the tip end of the pin member inserted into the insertion hole of the arm part are both supported by the region of the connection part adjacent to the insertion groove. Therefore, compared with the case where only the tip end of the pin member is held in the connection part, the reaction force of the pressing force acting on the pin member via the arm part acts evenly on both the base end and the tip end of the pin member, and the through hole of the connection part into which the pin member is inserted and its surroundings are prevented from being deformed. Therefore, the connection part to which the fuel pipe and the spray medium pipe are connected and the supply part that supplies the fuel and the spray medium from the connection part to the nozzle part can be appropriately maintained in a connected state to prevent leakage of the fuel and the spray medium.

[0063] A burner gun according to a fourth aspect of the present disclosure injects fuel and atomizing medium and is detachable from a boiler, and includes a fuel transport pipe for transporting the fuel, an atomizing medium transport pipe for transporting the atomizing medium, a nozzle to which the fuel transport pipe and the tip end of the atomizing medium transport pipe are connected and for injecting the fuel and the atomizing medium, a connection part having a fuel connection port to which a fuel pipe for supplying the fuel is connected and an atomizing medium connection port to which an atomizing medium pipe for supplying the atomizing medium is connected, a supply part having a fuel supply flow path for supplying the fuel from the fuel connection port to a base end of the fuel transport pipe and an atomizing medium supply flow path for supplying the atomizing medium from the atomizing medium connection port to the base end of the atomizing medium transport pipe, a connected state in which the connection part and the supply part are in contact with each other so that the fuel is supplied from the fuel connection port to the fuel supply flow path and the atomizing medium is supplied from the atomizing medium connection port to the atomizing medium supply flow path, and a connected state in which the connection part and the supply part are not in contact with each other. and a gasket disposed between the supply portion and the connection portion, the supply portion generating a pressing force in a direction to bring the supply portion into contact with the connection portion, and the pressing force presses the gasket to form a sealed area, the supply portion including a first arm portion (41) having one end attached to the connection portion, a second arm portion (41B) having one end attached to the connection portion, and a second arm portion (41B) attached to the other end side of the first arm portion and bringing the supply portion into contact with the connection portion. The fuel supply passage has a first pressing portion (42) that generates a pressing force in a direction away from the fuel supply portion, and a second pressing portion (42B) that is attached to the other end side of the second arm and generates a pressing force in a direction to bring the supply portion into contact with the connection portion, the first pressing portion bringing the supply portion into contact with the connection portion at a first pressing position (PA1) on a first axis (X1) along which the fuel supply flow passage extends, and the second pressing portion bringing the supply portion into contact with the connection portion at a second pressing position (PA2) on a second axis (X2) along which the spray medium supply flow passage extends.

[0064] According to the burner gun of the fourth aspect of the present disclosure, the fuel introduced from the fuel pipe to the fuel connection port of the connection part is supplied from the fuel connection port to the base end of the fuel conveying pipe through the fuel supply passage of the supply part, and the spray medium introduced from the spray medium pipe to the spray medium connection port of the connection part is supplied from the spray medium connection port to the base end of the spray medium conveying pipe through the spray medium supply passage of the supply part.

[0065] According to the burner gun of the fourth aspect of the present disclosure, the connecting part switches between a connected state in which the connection part and the supply part are brought into contact with each other to supply fuel from the fuel connection port to the fuel supply passage and the spray medium is supplied from the spray medium connection port to the spray medium supply passage, and a released state in which the connection part and the supply part are not in contact. Since a gasket is disposed between the supply part and the connecting part, in the connected state, a sealing area is formed by pressing the gasket with a pressing force in a direction to bring the supply part into contact with the connecting part.

[0066] According to the burner gun of the fourth aspect of the present disclosure, one end of the first arm is attached to the connection portion, the other end of the first arm is attached to the first pressing portion, and the first pressing portion generates a pressing force in a direction to bring the supply portion into contact with the connection portion. The first pressing portion brings the supply portion into contact with the connection portion at a first pressing position on a first axis along which the fuel supply flow passage extends. Since a uniform pressing force is applied to the gasket around the fuel connection port, it is possible to reliably prevent fuel from leaking from the fuel connection port.

[0067] According to the burner gun of the fourth aspect of the present disclosure, one end of the second arm is attached to the connection portion, the other end of the second arm is attached to the second pressing portion, and the second pressing portion generates a pressing force in a direction to bring the supply portion into contact with the connection portion. The second pressing portion brings the supply portion into contact with the connection portion at a second pressing position on the second axis along which the spray medium supply flow passage extends. Since a uniform pressing force is applied to the gasket around the spray medium connection port, it is possible to reliably prevent the spray medium from leaking from the spray medium connection port.

[0068] The burner gun according to the fifth aspect of the present disclosure is the fourth aspect, and further includes the following configuration: the first arm portion (41A) having one end attached to the connecting portion and the second arm portion (41B) having one end attached to the connecting portion press the supply portion so as to keep the contact surface of the connecting portion parallel.

[0069] The burner gun according to a sixth aspect of the present disclosure is the fifth aspect, further comprising the following configuration: That is, a first pressing force acting in a direction in which the first pressing portion brings the supply portion into contact with the connection portion at the first pressing position (PA1) on the first axis (X1) and a second pressing force acting in a direction in which the second pressing portion brings the supply portion into contact with the connection portion at the second pressing position (PA2) on the second axis (X2) are equal.

[0070] In a connecting method of a burner gun according to a seventh aspect of the present disclosure, the burner gun includes a fuel transport pipe for transporting the fuel, an atomizing medium transport pipe for transporting the atomizing medium, a connecting portion having a fuel connection port to which a fuel piping for supplying the fuel is connected and an atomizing medium connection port to which an atomizing medium piping for supplying the atomizing medium is connected, a supply portion having a fuel supply flow path for supplying the fuel from the fuel connection port to a base end of the fuel transport pipe and an atomizing medium supply flow path for supplying the atomizing medium from the atomizing medium connection port to the base end of the atomizing medium transport pipe, and The device has a connecting part that switches between a connected state in which the supply part is brought into contact with the fuel connection port to supply the fuel to the fuel supply flow passage and the spray medium is supplied from the spray medium connection port to the spray medium supply flow passage, and a released state in which the connection part and the supply part are not in contact, and a gasket that is arranged between the supply part and the connection part, and is provided with a connecting process in which the connecting part generates a pressing force in a direction to bring the supply part into contact with the connection part, and the gasket is pressed by the pressing force to form a sealed area, and the connection part has a support part that supports the supply part in the connected state.

[0071] According to the burner gun connecting method according to the seventh aspect of the present disclosure, the fuel introduced from the fuel piping to the fuel connection port of the connection part is supplied from the fuel connection port to the base end of the fuel conveying pipe via the fuel supply passage of the supply part, and the spray medium introduced from the spray medium piping to the spray medium connection port of the connection part is supplied from the spray medium connection port to the base end of the spray medium conveying pipe via the spray medium supply passage of the supply part.

[0072] According to the burner gun connecting method of the seventh aspect of the present disclosure, the connecting part switches between a connected state in which the connection part and the supply part are brought into contact with each other to supply fuel from the fuel connection port to the fuel supply passage and the spray medium is supplied from the spray medium connection port to the spray medium supply passage, and a released state in which the connection part and the supply part are not in contact. Since a gasket is disposed between the supply part and the connecting part, in the connected state, a sealing area is formed by pressing the gasket with a pressing force in a direction to bring the supply part into contact with the connecting part.

[0073] According to the burner gun connecting method according to the seventh aspect of the present disclosure, in the connected state, the lower end of the supply part in the vertical direction is supported by the support part of the connection part. Therefore, the same reaction force as the rotational force generated in the supply part is transmitted from the support part to the supply part, and the pressing force applied by the supply part to the connection part via the gasket becomes equal on the lower side and the upper side in the vertical direction. Therefore, the connection part and the supply part can be appropriately maintained in a connected state to prevent leakage of fuel and spray medium.

[0074] A method for connecting a burner gun according to an eighth aspect of the present disclosure, a method for connecting a burner gun which injects fuel and atomizing medium and is detachable from a boiler, the burner gun includes a fuel transport pipe which transports the fuel, an atomizing medium transport pipe which transports the atomizing medium, a nozzle to which the fuel transport pipe and the tip end of the atomizing medium transport pipe are connected and which injects the fuel and the atomizing medium, a connection part having a fuel connection port to which a fuel piping which supplies the fuel is connected and an atomizing medium connection port to which a spraying medium piping which supplies the spraying medium is connected, a supply part having a fuel supply flow path which supplies the fuel from the fuel connection port to a base end of the fuel transport pipe and an atomizing medium supply flow path which supplies the spraying medium from the spraying medium connection port to the base end of the spraying medium transport pipe, and a connection part and a supply part are brought into contact with each other so that the fuel is supplied from the fuel connection port to the fuel supply flow path and the atomizing medium is supplied from the spraying medium connection port to the atomizing medium supply flow path. The connecting portion has a connecting portion that switches between a connected state and a released state in which the connection portion and the supply portion are not in contact with each other, and a gasket that is disposed between the supply portion and the connection portion, and the connecting portion has a first arm portion having one end attached to the connection portion, a second arm portion having one end attached to the connection portion, a first pressing portion that is attached to the other end of the first arm and generates a pressing force in a direction in which the supply portion contacts the connection portion, and a second pressing portion that is attached to the other end of the second arm and connects the supply portion to the connection portion. and a second pressing portion that generates a pressing force in a direction that brings the supply portion into contact with the connection portion, and a connecting process is provided in which the connecting portion generates a pressing force in a direction that brings the supply portion into contact with the connection portion, and the gasket is pressed by the pressing force to form a sealed area, and in the connecting process, the first pressing portion brings the supply portion into contact with the connection portion at a first pressing position on a first axis along which the fuel supply flow passage extends, and the second pressing portion brings the supply portion into contact with the connection portion at a second pressing position on a second axis along which the spray medium supply flow passage extends.

[0075] According to the burner gun connecting method according to the eighth aspect of the present disclosure, the fuel introduced from the fuel piping to the fuel connection port of the connection part is supplied from the fuel connection port to the base end of the fuel conveying pipe via the fuel supply passage of the supply part, and the spray medium introduced from the spray medium piping to the spray medium connection port of the connection part is supplied from the spray medium connection port to the base end of the spray medium conveying pipe via the spray medium supply passage of the supply part.

[0076] According to the burner gun connecting method of the eighth aspect of the present disclosure, the connecting part switches between a connected state in which the connection part and the supply part are brought into contact with each other to supply fuel from the fuel connection port to the fuel supply passage and the spray medium is supplied from the spray medium connection port to the spray medium supply passage, and a released state in which the connection part and the supply part are not in contact. Since a gasket is disposed between the supply part and the connecting part, in the connected state, a sealing area is formed by pressing the gasket with a pressing force in a direction to bring the supply part into contact with the connecting part.

[0077] According to a connecting method for a burner gun according to an eighth aspect of the present disclosure, one end of the first arm is attached to the connecting portion, the other end of the first arm is attached to the first pressing portion, and the first pressing portion generates a pressing force in a direction to bring the supply portion into contact with the connecting portion. The first pressing portion brings the supply portion into contact with the connecting portion at a first pressing position on a first axis along which the fuel supply flow passage extends. Since a uniform pressing force is applied to the gasket around the fuel connection port, it is possible to reliably prevent fuel from leaking from the fuel connection port.

[0078] According to the burner gun connecting method according to the eighth aspect of the present disclosure, one end of the second arm is attached to the connection portion, the other end of the second arm is attached to the second pressing portion, and the second pressing portion generates a pressing force in a direction to bring the supply portion into contact with the connection portion. The second pressing portion brings the supply portion into contact with the connection portion at a second pressing position on the second axis along which the spray medium supply flow passage extends. Since a uniform pressing force is applied to the gasket around the spray medium connection port, it is possible to reliably prevent the spray medium from leaking from the spray medium connection port. [Explanation of symbols]

[0079] 1. Boiler 2 Furnace 2s side wall 3 Wind box front plate 5. Burnagan 11 Fuel transport pipe 11a,12a Base end 11b,12b Tip 11s,12s straight pipe section 11t,12t curved section 12 Spray medium transport pipe 13 Nozzle 14,15 Flexible hose 20 Piping connection parts (supply section) 20a bottom end 20f one side 20g other side 21 Fuel supply passage 22 Atomizing medium supply passage 23,24 Pipe insertion hole 25 Cover 30 Connection fittings 31 Fuel connection port 32 Atomizing medium connection port 33 Insertion groove 34 Through hole 35 Pin material 35a Proximal end 35b Tip 36 Support part 36a Tip 40,40A,40C connection part 41 Arm 41A 1st arm 41B 2nd arm 41C Arm 41a one end 41a1 Insertion hole 41b Other end 42 Pressing part 42A First pressing part 42c, 42Ac Pressing member 42B Second pressing part 42a Fastening bolt 42a1 Male thread 42a2 Tip 42b Female thread 42b1 Female thread 42c1 recess 50 Gasket 50g,50h communication hole 101 Fuel piping 101a End 102 Spray media piping 102a End DR1 1st direction DR2 2nd direction F fuel G Spray media Gc center of gravity HD horizontal P1 1st position P2 2nd position PA1 First pressing position PA2 Second pressing position VD Vertical direction X1 1st axis X2 2nd axis Y, YA, YB Swing axis

Claims

1. A burner gun that injects fuel and an atomizing medium and is detachable from a boiler, a fuel transport pipe for transporting the fuel; A spray medium conveying pipe for conveying the spray medium; a connection portion having a fuel connection port to which a fuel pipe for supplying the fuel is connected and an atomizing medium connection port to which an atomizing medium pipe for supplying the atomizing medium is connected; a supply unit having a fuel supply flow passage that supplies the fuel from the fuel connection port to a base end of the fuel transport pipe and an atomizing medium supply flow passage that supplies the atomizing medium from the atomizing medium connection port to the base end of the atomizing medium transport pipe; a connecting portion that switches between a connected state in which the connecting portion and the supply portion are brought into contact with each other so that the fuel is supplied from the fuel connection port to the fuel supply flow passage and the spray medium is supplied from the spray medium connection port to the spray medium supply flow passage, and a released state in which the connecting portion and the supply portion are not in contact with each other; a gasket disposed between the supply portion and the connection portion, the coupling portion generates a pressing force in a direction in which the supply portion contacts the connection portion, and the pressing force presses the gasket to form a seal region; The burner gun, wherein the connection portion has a support portion that supports the supply portion in the connected state.

2. The burner gun according to claim 1 , wherein a tip of the support portion is disposed at a position farther away from the gasket than the center of gravity of the supply portion.

3. The connecting portion is an arm portion having one end attached to the connection portion so as to be swingable around a swing axis; a pressing portion attached to the other end side of the arm portion and generating a pressing force in a direction to bring the supply portion into contact with the connection portion, The connection portion is an insertion groove into which the one end of the arm portion is inserted; A through hole formed to penetrate the insertion groove; The burner gun according to claim 1 or 2, further comprising a pin member inserted into both an insertion hole formed in the arm portion and the through hole.

4. A burner gun that injects fuel and an atomizing medium and is detachable from a boiler, a fuel transport pipe for transporting the fuel; A spray medium conveying pipe for conveying the spray medium; a nozzle to which the tip end of the fuel transport pipe and the tip end of the atomizing medium transport pipe are connected and which injects the fuel and the atomizing medium; a connection portion having a fuel connection port to which a fuel pipe for supplying the fuel is connected and an atomizing medium connection port to which an atomizing medium pipe for supplying the atomizing medium is connected; a supply unit having a fuel supply flow passage that supplies the fuel from the fuel connection port to a base end of the fuel transport pipe and an atomizing medium supply flow passage that supplies the atomizing medium from the atomizing medium connection port to the base end of the atomizing medium transport pipe; a connecting portion that switches between a connected state in which the connecting portion and the supply portion are brought into contact with each other so that the fuel is supplied from the fuel connection port to the fuel supply flow passage and the spray medium is supplied from the spray medium connection port to the spray medium supply flow passage, and a released state in which the connecting portion and the supply portion are not in contact with each other; a gasket disposed between the supply portion and the connection portion, the coupling portion generates a pressing force in a direction in which the supply portion contacts the connection portion, and the pressing force presses the gasket to form a seal region; The connecting portion is A first arm portion having one end attached to the connection portion; A second arm portion having one end attached to the connection portion; a first pressing portion attached to the other end side of the first arm portion and generating a pressing force in a direction to bring the supply portion into contact with the connection portion; a second pressing portion attached to the other end side of the second arm portion and generating a pressing force in a direction to bring the supply portion into contact with the connection portion, the first pressing portion brings the supply portion into contact with the connection portion at a first pressing position on a first axis along which the fuel supply flow passage extends, The second pressing portion brings the supply portion into contact with the connection portion at a second pressing position on a second axis along which the spray medium supply passage extends.

5. The burner gun according to claim 4, wherein the first arm portion, one end of which is attached to the connection portion, and the second arm portion, one end of which is attached to the connection portion, press the supply portion so as to keep the contact surface of the connection portion parallel.

6. The burner gun as described in claim 5, wherein a first pressing force acting in a direction to bring the supply portion into contact with the connection portion at the first pressing position on the first axis by the first pressing portion and a second pressing force acting in a direction to bring the supply portion into contact with the connection portion at the second pressing position on the second axis by the second pressing portion are equal.

7. A method for connecting a burner gun that injects fuel and an atomizing medium and is detachable from a boiler, comprising the steps of: The burner gun is a fuel transport pipe for transporting the fuel; A spray medium conveying pipe for conveying the spray medium; a connection portion having a fuel connection port to which a fuel pipe for supplying the fuel is connected and an atomizing medium connection port to which an atomizing medium pipe for supplying the atomizing medium is connected; a supply unit having a fuel supply flow passage that supplies the fuel from the fuel connection port to a base end of the fuel transport pipe and an atomizing medium supply flow passage that supplies the atomizing medium from the atomizing medium connection port to the base end of the atomizing medium transport pipe; a connecting portion that switches between a connected state in which the connecting portion and the supply portion are brought into contact with each other so that the fuel is supplied from the fuel connection port to the fuel supply flow passage and the spray medium is supplied from the spray medium connection port to the spray medium supply flow passage, and a released state in which the connecting portion and the supply portion are not in contact with each other; a gasket disposed between the supply portion and the connection portion, a connecting step in which the connecting portion generates a pressing force in a direction in which the supply portion contacts the connection portion, and the gasket is pressed by the pressing force to form a sealing region, A method for connecting a burner gun, wherein the connection portion has a support portion that supports the supply portion in the connected state.

8. A method for connecting a burner gun that injects fuel and an atomizing medium and is detachable from a boiler, comprising the steps of: The burner gun is a fuel transport pipe for transporting the fuel; A spray medium conveying pipe for conveying the spray medium; a nozzle to which the tip end of the fuel transport pipe and the tip end of the atomizing medium transport pipe are connected and which injects the fuel and the atomizing medium; a connection portion having a fuel connection port to which a fuel pipe for supplying the fuel is connected and an atomizing medium connection port to which an atomizing medium pipe for supplying the atomizing medium is connected; a supply unit having a fuel supply flow passage that supplies the fuel from the fuel connection port to a base end of the fuel transport pipe and an atomizing medium supply flow passage that supplies the atomizing medium from the atomizing medium connection port to the base end of the atomizing medium transport pipe; a connecting portion that switches between a connected state in which the connecting portion and the supply portion are brought into contact with each other so that the fuel is supplied from the fuel connection port to the fuel supply flow passage and the spray medium is supplied from the spray medium connection port to the spray medium supply flow passage, and a released state in which the connecting portion and the supply portion are not in contact with each other; a gasket disposed between the supply portion and the connection portion; The connecting portion is A first arm portion having one end attached to the connection portion; A second arm portion having one end attached to the connection portion; a first pressing portion attached to the other end side of the first arm portion and generating a pressing force in a direction to bring the supply portion into contact with the connection portion; a second pressing portion attached to the other end side of the second arm portion and generating a pressing force in a direction to bring the supply portion into contact with the connection portion, a connecting step in which the connecting portion generates a pressing force in a direction in which the supply portion contacts the connection portion, and the gasket is pressed by the pressing force to form a sealing region, A method for connecting a burner gun, in which, in the connecting process, the first pressing portion contacts the supply portion with the connection portion at a first pressing position on a first axis along which the fuel supply flow path extends, and the second pressing portion contacts the supply portion with the connection portion at a second pressing position on a second axis along which the spray medium supply flow path extends.

Images