Spray gun capable of realizing on-line leak-free installation

Abstract

The utility model belongs to the technical field of spray gun installation, and discloses a spray gun capable of realizing on-line leak-free installation, which comprises a spray gun and a short pipe arranged on the outer wall of equipment to be sprayed, one end of the short pipe is communicated with the inside of the equipment to be sprayed, and the other end of the short pipe is connected with a gate valve. The end, away from the short pipe, of the gate valve is detachably connected with an integral sealing flange, a flange sealing gasket is installed between the integral sealing flange and the gate valve, and the flange sealing gasket is matched with the integral sealing flange and the gate valve to form a compressed air sealing cavity. The integral sealing flange is sleeved outside a gun body of the spray gun, and a gun body sealing O-shaped ring which is in sealing fit with the gun body is arranged in the integral sealing flange. According to the utility model, the spray gun can be mounted and dismounted on line, personnel do not need to enter an internal pipeline or equipment for overhauling, poisonous or flammable and explosive hazardous gases in the spray gun do not leak during mounting, the structure is simple, the operation is convenient, and the production stability and safety can be greatly improved.

Description

Technical Field

[0001] This utility model belongs to the field of spray gun installation technology, specifically relating to a spray gun that can achieve online leak-free installation. Background Technology

[0002] In production processes in chemical, metallurgical, and coal mining industries, spray guns are often installed on pipelines or spray towers requiring spraying. However, current technology requires the nozzles to be pre-installed inside the pipelines or equipment for leak-free maintenance. If damage or repair is needed, work must be stopped, requiring maintenance personnel to enter the area, making online maintenance and installation impossible and impacting production. Furthermore, many scenarios in chemical and metallurgical industries involve toxic or flammable / explosive gases; shutdowns disrupt production, and entering such spaces for maintenance is extremely dangerous. Therefore, there is an urgent need for a spray gun that can achieve leak-free online installation, necessitating an improvement in the spray gun installation method. Utility Model Content

[0003] The purpose of this invention is to provide a spray gun that can be installed online without leakage, in order to solve the above-mentioned problems existing in the prior art.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A spray gun capable of online leak-free installation includes a spray gun and a short pipe installed on the outer wall of the equipment to be sprayed. One end of the short pipe is connected to the interior of the equipment, and the other end of the short pipe is connected to a gate valve. The end of the gate valve away from the short pipe is detachably connected to an integral sealing flange. A flange sealing gasket is installed between the integral sealing flange and the gate valve, and the flange sealing gasket and the integral sealing flange and the gate valve cooperate to form a compressed air sealing cavity. The integral sealing flange is sleeved on the outside of the spray gun body, and a gun body sealing O-ring is installed inside the integral sealing flange to seal with the gun body. An inlet quick-connect fitting and an outlet quick-connect fitting for displacing compressed air are installed on the integral sealing flange. The inlet of the inlet quick-connect fitting is connected to a displacing compressed air source through a pipeline, and the outlet of the inlet quick-connect fitting and the inlet of the outlet quick-connect fitting are both connected to the compressed air sealing cavity.

[0006] As a preferred technical solution of this utility model, the side of the integral sealing flange away from the gate valve is detachably connected to the gun body sealing pressure plate flange, and the gun body sealing pressure plate flange and the integral sealing flange are matched and machined with an annular groove, and the gun body sealing O-ring is matched and clamped in the annular groove.

[0007] As a preferred technical solution of this utility model, a flange mounting groove is provided on one side of the integral sealing flange, and the gun body sealing pressure plate flange is matched and disposed in the flange mounting groove, and the gun body sealing pressure plate flange and the integral sealing flange are connected by screws.

[0008] As a preferred technical solution of this utility model, the outlet of the quick-connect fitting is connected to the gas analyzer via a pipeline.

[0009] As a preferred technical solution of this utility model, a first valve is installed on the body of the spray gun, and the first valve is located on one side of the integral sealing flange.

[0010] As a preferred technical solution of this utility model, the other end of the short pipe is connected to a connecting flange, and the connecting flange is detachably connected to the gate valve.

[0011] As a preferred technical solution of this utility model, a flange sealing gasket is installed between the connecting flange and the gate valve.

[0012] Beneficial Effects: This utility model utilizes a gun body sealing O-ring to complete the sealing and insertion / removal of the spray gun. A gate valve isolates flammable, explosive, or toxic fumes during production. When the spray gun needs to be installed online, first connect the integral sealing flange to one end of the gate valve. The gun body sealing O-ring and flange gasket prevent gas leakage from the gun body sealing O-ring. Then, open the gate valve and move the spray gun so that the nozzle passes through the gate valve and short pipe before entering the spray gun. The tail of the spray gun is connected to the spray liquid container via a hose for spraying. After spraying, the spray gun can be moved in the reverse direction so that the nozzle is outside the gate valve's cut-off port. Then, close the gate valve and use compressed air to displace the hazardous gas between the gate valve and the integral sealing flange, allowing the integral sealing flange to be removed. This enables online installation and removal of the spray gun. Compared to traditional built-in systems, personnel do not need to enter the internal pipes or equipment for maintenance. There is no leakage of toxic, flammable, or explosive gases during installation. Furthermore, the structure is simple and easy to operate, greatly improving production stability and safety. Attached Figure Description

[0013] Figure 1 This is a structural diagram of the present invention;

[0014] Figure 2 for Figure 1 An enlarged schematic diagram of part A in the middle.

[0015] In the diagram: 1-Spray gun; 2-Equipment to be sprayed; 3-Short pipe; 4-Gate valve; 5-Integral sealing flange; 6-Gun body sealing O-ring; 7-Gun body sealing pressure plate flange; 8-Inlet quick-connect coupling; 9-Outlet quick-connect coupling; 10-Gas analyzer; 11-First valve; 12-Connecting flange; 13-Replacement compressed air source. Detailed Implementation

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the present utility model will be briefly introduced below in conjunction with the accompanying drawings and descriptions of the embodiments or the prior art. Obviously, the following description of the structure of the accompanying drawings is only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. It should be noted that the description of these embodiments is used to help understand this utility model, but does not constitute a limitation on this utility model.

[0017] Example:

[0018] like Figure 1 and Figure 2 As shown, this embodiment provides a spray gun that can be installed online without leakage. It includes a spray gun 1 and a short pipe 3 installed on the outer wall of the device to be sprayed 2 (i.e., internal pipe or equipment). One end of the short pipe 3 is connected to the inside of the device to be sprayed 2, allowing the nozzle of the spray gun 1 to pass through the short pipe 3 and enter the inside of the device to be sprayed, so that the spray gun 1 can spray the inside of the device to be sprayed. The other end of the short pipe 3 is connected to a gate valve 4. Before installing the spray gun 1, the gate valve 4 is always in a closed state to prevent gas leakage. The above structure is always installed on the device to be sprayed 2 as a fixed structure, which includes a detachable structure, as detailed below:

[0019] The end of the gate valve 4 furthest from the short pipe 3 is detachably connected to an integral sealing flange 5, which is simply connected by bolts. This is existing technology and will not be described in detail. A flange sealing gasket is installed between the integral sealing flange 5 and the gate valve 4. The flange sealing gasket has a ring structure and is pressed between the integral sealing flange 5 and the gate valve 4, which allows the flange sealing gasket and the integral sealing flange 5 and the gate valve 4 to cooperate to form a compressed air sealing cavity, ensuring the sealing effect and preventing toxic, flammable, explosive or other dangerous gases in the spraying equipment 2 from leaking from the integral sealing flange 5 and the gate valve 4. The integral sealing flange 5 is sleeved on the outside of the spray gun 1, and an integral sealing flange 5 is installed inside the spray gun 1. The nozzle is equipped with a nozzle sealing O-ring 6 that seals with the nozzle body to ensure a seal between the integral sealing flange 5 and the nozzle body, preventing gas leakage. In practice, the integral sealing flange 5 and the nozzle sealing O-ring 6 always mate with the nozzle body of the spray gun 1. When installing the spray gun 1, first connect the integral sealing flange 5 to one end of the gate valve 4. When connecting, set the flange sealing gasket to prevent gas leakage from the nozzle sealing O-ring 6 and also to prevent gas leakage between the integral sealing flange 5 and the gate valve 4. Then open the gate valve 4 and move the spray gun 1 so that the head of the spray gun 1 passes through the gate valve 4 and the short pipe 3 and enters the spray gun 1. The tail of the spray gun 1 is connected to the spray liquid container through a hose for spraying. After spraying, the spray gun 1 can be moved in the reverse direction so that the nozzle of the spray gun 1 is moved outside the cut-off port of the gate valve 4, and then the gate valve 4 is closed. On this basis, the integral sealing flange 5 is equipped with an inlet quick-connect fitting 8 and an outlet quick-connect fitting 9 for replacing compressed air. The inlet of the inlet quick-connect fitting 8 is connected to the replacement compressed air source 13 through a pipeline. The outlet of the inlet quick-connect fitting 8 and the inlet of the outlet quick-connect fitting 9 are both connected to the compressed air sealing cavity. When removing the spray gun 1, first move the nozzle of the spray gun 1 outside the cut-off port of the gate valve 4, close the gate valve 4, and then use compressed air to purge the compressed air sealing cavity to isolate any toxic or flammable and explosive fumes that may be present inside the gun body, ensuring the safety of operation after removal, and realizing the online installation and removal of the spray gun 1.

[0020] Compared with traditional built-in designs, this invention allows for online installation and maintenance, eliminating the need for personnel to enter internal pipes or equipment. It prevents leakage of toxic, flammable, or explosive gases during installation, and features a simple structure and convenient operation, significantly improving production stability and safety. Specifically, the O-ring 6 on the gun body allows for the sealing and insertion / removal of the spray gun 1, while the gate valve 4 isolates flammable, explosive, or toxic fumes during production, ensuring online installation and removal of the spray gun 1.

[0021] As a preferred embodiment of this invention, it should be further explained that the outlet of the quick-connect connector 9 is connected to the gas analyzer 10 through a pipeline. When the compressed gas sealing cavity is purged with compressed gas to isolate any toxic or flammable and explosive fumes that may exist inside the gun body, the gas analyzer can be used to ensure that the toxic or flammable and explosive gases have been replaced, ensuring that the gas between the two meets the requirements for safe maintenance, thereby more effectively ensuring the safety of the operation after dismantling.

[0022] Example 2:

[0023] This embodiment is a further improvement based on Embodiment 1. The specific differences between this embodiment and Embodiment 1 are as follows:

[0024] As a preferred embodiment of this utility model, it should be further explained that the gun body sealing plate flange 7 is detachably connected to the side of the integral sealing flange 5 away from the gate valve 4. The gun body sealing plate flange 7 and the integral sealing flange 5 are matched and machined with an annular groove. The gun body sealing O-ring 6 is matched and clamped in the annular groove to meet the accuracy requirements for installing the gun body sealing O-ring 6. After the gun body sealing O-ring 6 is pressed, it can ensure a seal.

[0025] As a preferred embodiment of this invention, it should be further explained that a flange mounting groove is provided on one side of the integral sealing flange 5, and the gun body sealing pressure plate flange 7 is matched and disposed in the flange mounting groove, so that the integral sealing flange 5 and the gun body sealing pressure plate flange 7 fit better, and the gun body sealing pressure plate flange 7 and the integral sealing flange 5 are connected by screws, which facilitates quick installation and removal.

[0026] Example 3:

[0027] This embodiment is a further improvement based on Embodiment 1 or Embodiment 2. The specific differences between this embodiment and Embodiment 1 or Embodiment 2 are as follows:

[0028] As a preferred embodiment of this utility model, it should be further explained that a first valve 11 is installed on the body of the spray gun 1. The first valve 11 is located on one side of the integral sealing flange 5. When no spraying liquid is being sprayed, the first valve 11 is closed to prevent toxic or flammable and explosive fumes from flowing back along the spray gun 1. The integral sealing flange 5 is always located on the body of the gun between the first valve 11 and the nozzle.

[0029] As a preferred embodiment of this invention, it should be further noted that the other end of the short pipe 3 is connected to a connecting flange 12, which is detachably connected to the gate valve 4, and the connection method is simple and stable.

[0030] As a preferred embodiment of this invention, it should be further noted that a flange sealing gasket is installed between the connecting flange 12 and the gate valve 4 to ensure sealing.

[0031] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A lance that can be installed online without leakage, comprising a lance (1), characterized in that, The short pipe (3) is installed on the outer wall of the to-be-sprayed equipment (2), one end of the short pipe (3) is connected with the inside of the to-be-sprayed equipment (2), the other end of the short pipe (3) is connected with the gate valve (4), the end, away from the short pipe (3), of the gate valve (4) is detachably connected with the integral sealing flange (5), the flange sealing gasket is installed between the integral sealing flange (5) and the gate valve (4), and the flange sealing gasket and the integral sealing flange (5) and the gate valve (4) are matched to form the compressed gas sealing cavity; the integral sealing flange (5) is sleeved on the gun body of the spray gun (1), the gun body sealing O-shaped ring (6) is installed in the integral sealing flange (5) and matched with the gun body; the inlet quick connector (8) and the outlet quick connector (9) are installed on the integral sealing flange (5) and used to replace the compressed gas, the inlet of the inlet quick connector (8) is connected with the replacement compressed gas source (13) through a pipeline, and the outlet of the inlet quick connector (8) and the inlet of the outlet quick connector (9) are connected with the compressed gas sealing cavity.

2. A lance according to claim 1, characterized in that The side, away from the gate valve (4), of the integral sealing flange (5) is detachably connected with the gun body sealing pressing plate flange (7), the annular groove is matched and processed between the gun body sealing pressing plate flange (7) and the integral sealing flange (5), and the gun body sealing O-shaped ring (6) is matched and clamped in the annular groove.

3. A lance according to claim 2, wherein The side of the integral sealing flange (5) is provided with the flange mounting groove, the gun body sealing pressing plate flange (7) is matched and arranged in the flange mounting groove, and the gun body sealing pressing plate flange (7) and the integral sealing flange (5) are connected through screws.

4. A lance according to any one of claims 1-3, characterized in that The outlet of the outlet quick connector (9) is connected with the gas analyzer (10) through a pipeline.

5. A spray gun capable of online leak-free installation according to claim 1, wherein, The first valve (11) is installed on the gun body of the spray gun (1) and located on one side of the integral sealing flange (5).

6. A spray gun capable of online leak-free installation according to claim 1, wherein, The other end of the short pipe (3) is connected with the connecting flange (12), and the connecting flange (12) is detachably connected with the gate valve (4).

7. A lance according to claim 6, wherein The flange sealing gasket is installed between the connecting flange (12) and the gate valve (4).

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