Low-flow double-fluid spray gun for flue gas denitration

Abstract

The utility model relates to the technical field of denitration equipment, in particular to a low-flow double-fluid spray gun for flue gas denitration, which comprises a spray gun body, a spray head, a gas inlet pipe, a liquid inlet pipe and an anti-backflow component, the backflow prevention assembly comprises a shell, a connecting rod, a sealing plate, a spring and a driving component, the shell is fixedly connected with the spray gun body, the sealing plate is slidably connected with the shell, the connecting rod is fixedly connected with the sealing plate, the two ends of the spring abut against the shell and the sealing plate respectively, and the spring is located in the shell. And at the moment, the sealing plate is reset under the action of the spring, then the sealing plate is moved out of the containing groove to seal the air inlet channel again, liquid left in the spray gun body cannot flow back into the air inlet pipe through the air inlet channel, and therefore the purpose of preventing the air inlet pipe or the air supply equipment from being damaged is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of denitrification equipment, in particular to a low-flow double-fluid spray gun for flue gas denitrification. Background Art

[0002] Denitrification spray guns are widely used in flue gas treatment. Traditional denitrification spray guns cannot adjust the flow rate, which makes them inconvenient to use.

[0003] The prior art CN213825428U discloses a dual-fluid denitrification spray gun with adjustable flow, comprising a first gun barrel, a connecting block is installed at the left end of the first gun barrel, a nozzle is arranged at the end of the connecting block away from the first gun barrel, a protective sleeve is provided on the outer wall of the connecting block, and the left end of the protective sleeve is connected to the top of the first gun barrel through a connecting rope. The utility model installs an adjustment mechanism, and the user pushes the handle to move to the left, and the block clamps the toggle handle on the ball valve. Driven by the toggle handle, the ball valve rotates counterclockwise with the rotating shaft as the axis. At this time, the water hole on the ball valve is connected with the first through hole on the first sealing ring and the second through hole on the second sealing ring, so as to achieve the maximum area of ​​the water hole. The movable seat can stay at any position on the top of the first gun barrel according to the needs of the user through the cooperation of the slider and the slide rail, which is convenient for adjusting the flow of the spray gun, meeting the needs of different users, and improving the practicality of the spray gun.

[0004] The above device can adjust the flow rate, but after the spray gun is used, the residual liquid inside it will pass through the air intake pipe, causing damage to the air intake pipe or the air supply equipment, affecting the use. Utility Model Content

[0005] The utility model aims to provide a low-flow dual-fluid spray gun for flue gas denitrification, which solves the problem that after the existing dual-fluid denitrification spray gun with adjustable flow is used, the residual liquid inside it will pass through the air intake pipe, causing damage to the air intake pipe or air supply equipment, thus affecting the use.

[0006] To achieve the above-mentioned purpose, the utility model provides a low-flow dual-fluid spray gun for flue gas denitrification, comprising a spray gun body, a nozzle, an air inlet pipe and a liquid inlet pipe, the nozzle being mounted on the spray gun body, the liquid inlet pipe being mounted on the spray gun body and being communicated with the spray gun body, and also comprising an anti-backflow assembly located between the spray gun body and the air inlet pipe; the anti-backflow assembly comprises an outer shell, a connecting rod, a sealing plate, a spring and a driving member, the outer shell being fixedly connected to the spray gun body and to the air inlet pipe, and being communicated with the spray gun body and the air inlet pipe respectively, the sealing plate being slidably connected to the outer shell and being located inside the outer shell, the connecting rod being fixedly connected to the sealing plate and being located on one side of the sealing plate, the two ends of the spring being respectively abutted against the outer shell and the sealing plate, the spring being located inside the outer shell, the driving member being arranged on the outer shell and driving the connecting rod to move.

[0007] Wherein, the backflow prevention assembly further comprises a guide rod, the guide rod is fixedly connected to the shell and slidably connected to the sealing plate, and is located inside the shell.

[0008] Wherein, the driving component includes a piston cylinder, a piston and an air supply component, the piston cylinder is fixedly connected to the outer shell and is located inside the outer shell; the piston is slidably connected to the piston cylinder, fixedly connected to the connecting rod, and is located inside the piston cylinder; the air supply component is arranged on the outer shell.

[0009] Wherein, the air supply component includes an air supply pipe and a connecting pipe, the connecting pipe is fixedly connected to the outer shell and communicated with the outer shell; the air supply pipe is communicated with the piston cylinder and the connecting pipe, and is arranged on the connecting pipe.

[0010] Wherein, the sealing plate includes a plate body, a first sealing gasket and a second sealing gasket, the plate body is slidably connected to the outer shell, and is slidably connected to the guide rod, and is fixedly connected to the connecting rod; the first sealing gasket is fixedly connected to the plate body and is arranged on the plate body; the second sealing gasket is fixedly connected to the plate body and is arranged on the plate body.

[0011] The utility model discloses a low-flow dual-fluid spray gun for flue gas denitrification. When the device is used, air enters the outer shell through the air intake pipe. At this time, the driving component drives the connecting rod to move, and then the connecting pipe drives the sealing plate to move, so that the sealing plate compresses the spring and is received in the receiving groove. At this time, compressed air can enter the spray gun body through the air intake passage. When use is completed, the driving component is reset. At this time, the sealing plate is reset under the action of the spring, and then the sealing plate is moved out of the receiving groove to re-seal the air intake passage. At this time, the liquid remaining in the spray gun body cannot flow back to the inside of the air intake pipe through the air intake passage, thereby achieving the purpose of avoiding damage to the air intake pipe or the air supply equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0013] Figure 1 It is a schematic diagram of the overall structure of a low-flow dual-fluid spray gun for flue gas denitrification according to the first embodiment of the utility model.

[0014] Figure 2 It is a structural schematic diagram of the driving component of the first embodiment of the utility model.

[0015] Figure 3 It is a schematic diagram of the installation structure of the first sealing gasket of the second embodiment of the utility model.

[0016] In the figure: 101-spray gun body, 102-spray head, 103-air inlet pipe, 104-liquid inlet pipe, 105-air inlet channel, 106-storage groove, 107-anti-backflow assembly, 108-housing, 109-connecting rod, 110-sealing plate, 111-spring, 112-driving member, 113-guide rod, 114-piston cylinder, 115-piston, 116-air supply component, 117-air supply pipe, 118-connecting pipe, 201-plate body, 202-first sealing gasket, 203-second sealing gasket. DETAILED DESCRIPTION

[0017] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0018] First embodiment:

[0019] See also Figure 1 and Figure 2 ,in Figure 1This is a schematic diagram of the overall structure of a low-flow dual-fluid spray gun for flue gas denitrification. Figure 2 It is a structural schematic diagram of the driving component.

[0020] The utility model provides a low-flow dual-fluid spray gun for flue gas denitrification, comprising a spray gun body 101, a nozzle 102, an air inlet pipe 103, a liquid inlet pipe 104 and an anti-backflow assembly 107, wherein the anti-backflow assembly 107 comprises a housing 108, a connecting rod 109, a sealing plate 110, a spring 111, a driving member 112 and a guide rod 113, wherein the driving member 112 comprises a piston cylinder 114, a piston 115 and an air supply component 116, wherein the air supply component 116 comprises an air supply pipe 117 and a connecting pipe 118, wherein the connecting rod 109 is driven by the driving member 112 to move, and the air supply component 116 is connected to the liquid inlet pipe 118. The sealing plate 110 is driven to move so that when the device is in use, the sealing plate 110 is stored in the storage groove 106, and the compressed air can enter the spray gun body 101 through the air inlet channel 105. After use, the sealing plate 110 is reset under the action of the spring 111, and then the air inlet channel 105 is sealed to prevent the residual liquid in the spray gun body 101 from flowing back. It can be understood that the above scheme can be used to prevent the residual liquid in the spray gun body 101 from flowing back, and can also be used to solve the problem of driving the connecting rod 109 to move.

[0021] For this specific embodiment, the nozzle 102 is installed on the spray gun body 101, the liquid inlet pipe 104 is installed on the spray gun body 101 and is connected to the spray gun body 101, the liquid inlet pipe 104 is used to transport the ammonia solution, the air inlet pipe 103 is used to transport the compressed gas, and the spray gun body 101 is also provided with a valve structure (not shown in the figure) for adjusting the flow rate. The valve structure is a prior art and will not be described in detail here. The ammonia solution and the compressed air enter the spray gun body 101 through the liquid inlet pipe 104 and the air inlet pipe 103 respectively, and after being mixed inside the spray gun body 101, they are sprayed out through the nozzle 102.

[0022] Wherein, the shell 108 is fixedly connected to the spray gun body 101, and is fixedly connected to the air inlet pipe 103, and is communicated with the spray gun body 101 and the air inlet pipe 103 respectively; the sealing plate 110 is slidably connected to the shell 108 and is located inside the shell 108; the connecting rod 109 is fixedly connected to the sealing plate 110 and is located on one side of the sealing plate 110; the two ends of the spring 111 are respectively in contact with the shell 108 and the sealing plate 110; the spring 111 is located inside the shell 108; the driving member 112 is arranged on the shell 108, and drives the connecting rod 109 to move; the shell 108 is provided with an air inlet channel 105 and a receiving groove 106; the spring 111 is located inside the receiving groove 106; two connecting rods 109 are provided; when the device is used , air enters the housing 108 through the air intake pipe 103, at which time the driving component 112 drives the connecting rod 109 to move, thereby causing the connecting pipe 118 to drive the sealing plate 110 to move, so that the sealing plate 110 compresses the spring 111 and is received in the receiving groove 106, and at this time the compressed air can enter the spray gun body 101 through the air intake passage 105; when use is completed, the driving component 112 is reset, and at this time the sealing plate 110 is reset under the action of the spring 111, thereby causing the sealing plate 110 to be moved out of the receiving groove 106, and the air intake passage 105 is re-sealed, and at this time the residual liquid in the spray gun body 101 cannot flow back to the air intake pipe 103 through the air intake passage 105, thereby achieving the purpose of avoiding damage to the air intake pipe 103 or the air supply equipment.

[0023] Secondly, the guide rod 113 is fixedly connected to the outer shell 108 and slidably connected to the sealing plate 110, and is located inside the outer shell 108; the movement of the sealing plate 110 is guided by the guide rod 113, so that the sealing plate 110 can only move along the length direction of the guide rod 113, thereby improving the stability of the sealing plate 110 when moving.

[0024] At the same time, the piston cylinder 114 is fixedly connected to the outer shell 108 and is located inside the outer shell 108; the piston 115 is slidably connected to the piston cylinder 114, fixedly connected to the connecting rod 109, and is located inside the piston cylinder 114; the air supply component 116 is arranged on the outer shell 108.

[0025] In addition, the connecting pipe 118 is fixedly connected to the outer shell 108 and communicated with the outer shell 108 ; the air supply pipe 117 is communicated with the piston cylinder 114 and the connecting pipe 118 , and is arranged on the connecting pipe 118 .

[0026] There are two piston cylinders 114 and two pistons 115, and the two pistons 115 are respectively connected to the two connecting rods 109; when the air supply equipment delivers compressed air to the air inlet pipe 103, the compressed air enters the outer shell 108, and at this time, the compressed air first enters the connecting pipe 118, and then the compressed air is delivered to the air supply pipe 117 through the connecting pipe 118. The air supply pipe 117 delivers air to the two piston cylinders 114, and then the piston 115 moves under the action of the compressed air, thereby driving the connecting rod 109 and the sealing plate 110 to move, thereby achieving the purpose of driving the connecting rod 109 to move.

[0027] When the low-flow dual-fluid spray gun for flue gas denitrification of this embodiment is used, compressed air enters the housing 108 through the air inlet pipe 103, and then the compressed air enters the connecting pipe 118 and the air supply pipe 117, and then the compressed air enters the piston cylinder 114, so that the compressed air drives the piston 115 to move, and then the piston 115 drives the connecting rod 109 and the sealing plate 110 to move, so that the sealing plate 110 squeezes the spring 111 and is stored in the storage groove 106. At this time, the air inlet pipe 103 is used to press the spring 111 and store it in the storage groove 106. The air inlet passage 105 is opened, so that the compressed air can enter the spray gun body 101 through the shell 108; when use is completed, the air inlet pipe 103 stops supplying air, and the sealing plate 110 is reset under the action of the spring 111, thereby re-sealing the air inlet passage 105 to prevent the residual liquid in the spray gun body 101 from flowing back to the air inlet pipe 103 and the air supply equipment, thereby preventing the liquid in the spray gun body 101 from flowing back and causing damage to the air inlet pipe 103 and the air supply equipment.

[0028] Second embodiment:

[0029] Based on the first embodiment, please refer to Figure 3 , Figure 3 2 is a schematic diagram of the installation structure of the first sealing gasket of the second embodiment. The sealing plate 110 of this embodiment includes a plate body 201 , a first sealing gasket 202 and a second sealing gasket 203 .

[0030] According to this specific embodiment, the plate body 201 is slidably connected to the outer shell 108, and is slidably connected to the guide rod 113, and is fixedly connected to the connecting rod 109; the first sealing gasket 202 is fixedly connected to the plate body 201 and is arranged on the plate body 201; the second sealing gasket 203 is fixedly connected to the plate body 201 and is arranged on the plate body 201; the sealing effect of the sealing plate 110 is improved by the first sealing gasket 202 and the second sealing gasket 203, thereby preventing liquid from entering the intake pipe 103 through the gap between the plate body 201 and the outer shell 108.

[0031] What is disclosed above is only one or more preferred embodiments of the present application, and cannot be used to limit the scope of rights of the present application. Ordinary technicians in this field can understand that all or part of the processes of implementing the above embodiments and equivalent changes made according to the claims of the present application are still within the scope covered by the present application.

Claims

1. A low-flow dual-fluid spray gun for flue gas denitrification, comprising a spray gun body, a nozzle, an air inlet pipe and a liquid inlet pipe, wherein the nozzle is mounted on the spray gun body, the liquid inlet pipe is mounted on the spray gun body and communicated with the spray gun body, characterized in that: Also included is a backflow prevention assembly located between the spray gun body and the air inlet pipe; The backflow prevention assembly includes a shell, a connecting rod, a sealing plate, a spring and a driving member. The shell is fixedly connected to the spray gun body and the air intake pipe, and is communicated with the spray gun body and the air intake pipe respectively. The sealing plate is slidably connected to the shell and is located inside the shell. The connecting rod is fixedly connected to the sealing plate and is located on one side of the sealing plate. The two ends of the spring are respectively abutted against the shell and the sealing plate. The spring is located inside the shell. The driving member is arranged on the shell and drives the connecting rod to move.

2. The low-flow dual-fluid spray gun for flue gas denitrification according to claim 1, characterized in that: The backflow prevention assembly further comprises a guide rod, which is fixedly connected to the shell and slidably connected to the sealing plate and is located inside the shell.

3. The low-flow dual-fluid spray gun for flue gas denitrification according to claim 1, characterized in that: The driving component includes a piston cylinder, a piston and an air supply component. The piston cylinder is fixedly connected to the outer shell and is located inside the outer shell; the piston is slidably connected to the piston cylinder, fixedly connected to the connecting rod, and is located inside the piston cylinder; the air supply component is arranged on the outer shell.

4. The low-flow dual-fluid spray gun for flue gas denitrification according to claim 3, characterized in that: The air supply component includes an air supply pipe and a connecting pipe. The connecting pipe is fixedly connected to the shell and communicated with the shell. The air supply pipe is communicated with the piston cylinder and the connecting pipe and is arranged on the connecting pipe.

5. The low-flow dual-fluid spray gun for flue gas denitrification according to claim 2, characterized in that: The sealing plate includes a plate body, a first sealing gasket and a second sealing gasket. The plate body is slidably connected to the outer shell, slidably connected to the guide rod, and fixedly connected to the connecting rod; the first sealing gasket is fixedly connected to the plate body and arranged on the plate body; the second sealing gasket is fixedly connected to the plate body and arranged on the plate body.

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